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20 December 2017, Volume 31 Issue 6 Previous Issue    Next Issue

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Case History of Soil Improvements of Miscellaneous Fills in Yellow River Delta Alluvium of Shandong HOU Fang 2017, 31 (6):  655-658.  Abstract ( 893 )   Save In the urban construction, the improvement of miscellaneous fill soils is frequently encountered. The miscellaneous fill soil in Shandong Yellow River delta alluvium has the characterization of shallow groundwater and soft soil underlying layers. The two typical characterizations strongly affect the selection of soil improvement methods, soil improvement depth, material and construction equipment. Based on the site subsurface conditions as well as building requirements at two sites, three soil improvement methods; CementFlyash Gravel (CFG) columns; soil replacement with compacted graded sand and gravel and composite ground with columns of expanded base formed by founding; are compared and discussed. This design and construction aspects of these soil improvement methods are also introduced. Related Articles | Metrics

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An Innovative Deep Excavation Support of Combining DoubleRow Piles with Vertical Ground Anchors GUO Shengjuan1, TANG Wei2 2017, 31 (6):  659-661.  Abstract ( 1027 )   Save Deep excavation supporting projects with the constraint of rightofway are frequently encountered during the construction. The conventional supporting methods under this situation are: internal support; rakes; partial internal supports, doublerow piles and topdown construction. All above mentioned supporting methods are complicated and time consuming. An innovative excavation supporting system is introduced with a project case history. The new supporting system is the combination of conventional doublerow pile and vertical ground anchors. The horizontal anchors in the conventional supporting system are switched to the vertical direction. Since the doublerow piles and groundwater anchors are conventional construction technique, the construction of the new supporting system can be simplified. Related Articles | Metrics

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Seepage Characterization of Slurry Walls Constructed by TRD Method in Complex Soil Strata HUANG Bingde， DI Guoen 2017, 31 (6):  662-666.  Abstract ( 1043 )   Save The seepage and strength properties for the Trenching cutting and Remixing Deep (TRD) wall as the slurry wall are critical for a safe foundation excavation projects as well as minimizing the adverse impact to the adjacent environment. This paper presents the statistical analysis results of the laboratory and insitu tests on the seepage properties of the soilmixed the walls. The seepage properties and the construction quality of the slurry walls constructed with TRD method were examined from the constructability point of view. The test results indicate that, the seepage properties of the constructed TRD wall are significantly reduced, compared with the original insitu soils, especially, silty and sandy soils. The tested coefficient of permeability of slurry wall in silty and sand soils is between 10-6 cm/s and 10-8 cm/s. The construction results show that the TRD constructed slurry can effectively separate the connections between the excavated area and soil behind the wall. It can also separate the hydraulic link of the artesian groundwater in the deep thick sandy stratum. Related Articles | Metrics

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A Cause Study of the Remediation of an OffAligned Viaduct Pier WANG Junrong1, YIN Jianguang2 2017, 31 (6):  667-669.  Abstract ( 1267 )   Save The construction quality of the engineering is frequently defective. If these flawed elements are completely rejected and reconstructed, it is usually associated with large construction cost increase and delayed schedule.  In the reinforced concrete bored pile in soft soil, it is especially difficult for the reconstruction of a new bored pile at the original location. This paper presents a case study of the remediation of a defective reinforced concrete bored pile. The constructible, reliable, safe and cost effective solutions have also proposed. \= Related Articles | Metrics

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Preliminary Study on the Expansive SoilIssues in Wuhan Tianhe International Airport Area JIN Xinfeng 2017, 31 (6):  670-673.  Abstract ( 1006 )   Save Based on the final geotechnical investigation results, a special expansive soil investigation program was conducted for the Tianhe International Airport Third Phase Expansion Project. Through the field sampling, laboratory tests and field investigations, the expansive soils in Tianhe area are characterized to have a small expansion when absorbing moisture and high contraction after the moisture loss. In engineered fill areas with the onsite soils, the expansion indices are generally higher than the original undisturbed expansive soils. As a result of this special investigation program, the horizontal and vertical distribution limits of the expansive soil are presented and this would lead to a significant construction and operational cost saving. The preventive control measures of the expansive soil are also provided in the paper. Related Articles | Metrics

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Stability Analysis of a Collapsible Loess Slope TIAN Jingkai 2017, 31 (6):  674-677.  Abstract ( 829 )   Save Collapsible loess is a typical problematic soil which is very sensitive to the moisture content. The collapsible loess slopes are widely distributed in Shanxi, and geological hazards are frequently occurred. This paper presents the stability evaluation and remediation results of a failed loess slope in Linxian County, Shanix Province. A geotechnical investigation program was conducted at the failed slope site. It is evident that the intrinsic strength of the loess slope weakened by the infiltration of surface water from the precipitation. The failed slope was analyzed by using Huaning Geotechnical Engineering software and the remediation scheme was then proposed. The case history indicates that the proper drainage system is critically important for the stability of the loess slopes. Related Articles | Metrics

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A New Reinforcement Design Method for a Rolling Rock Mass at Beishan Park of Yangjiang City XIAO Rongjun 2017, 31 (6):  678-681.  Abstract ( 913 )   Save This paper presents a new design method for the remediation of a rolling rock mass at Beishan Park of Yangjiang City. Factors that might affect the stability of the rolling rock mass, such as, geological conditions, construction methods and adjacent environments, are investigated. A new design method for stabilizing the rolling rock mass by using the combination of shallow buried reinforced concrete grid beam support system and steel pipe piles. Both strength of both the supporting beams and the pipe piles are checked. The displacement of the rolling rock mass was also monitored during and after the construction and the results are satisfactory. The case study has proved that this new design method is appropriate. Related Articles | Metrics

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Excavation of a Tunnel Exit Portal with Thin Overburden in N--J Project WANG Fan, PENG Huichun 2017, 31 (6):  682-684.  Abstract ( 920 )   Save In the tunnel excavation construction in the mountain area, the conventional excavation sequence is started from the outside of the mountain. The access road and the excavation platform are necessary and these auxiliary facilities are resulted in large disturbance at the portal of the tunnel. A new tunnel excavation method, which is excavated from inside of the tunnel towards the exit, was applied in the water tunnel exit portal in NJ Hydraulic Electricity Project. The advantages of this method are the following: the disturbance to the adjacent area of the exit portal is significantly reduced; the cost for the purchase of the required property around the portal area is reduced; and the construction safety is also improved. Related Articles | Metrics

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Evaluation and Settlement Analysis of Collapsible Loess Soils Improved by Dynamic Compaction YA Ruwen 2017, 31 (6):  685-689.  Abstract ( 3835 )   Save This paper presents the geotechnical engineering investigation and evaluation results of a collapsible loess project site in the east Ningxia before and after the soil improvement by the dynamic compaction. The investigation methods included laboratory soil tests, standard penetration tests, Becker penetration tests as well as insitu plate loading tests before and after the soil improvement. The settlement of the site was also evaluated. The following results can be obtained: 1)the unit weight of the loess soils was significantly increased. The compressibility of the loess soil was low and the collapsible potential of the surficial loess soils were reasonably eliminated. The bearing capacity of the improved loess soils reached the design requirements. The dynamic compaction was suitable for improving the east Ningxia loess soils. 2)for sites that were backfilled with collapsible loess soils, a layer of cushion material is necessary at the bottom of the foundation so that the minor settlement induced by the surface water infiltration could be avoided. Gravel is the desired cushion material. 3)The consolidation induced by the backfill material and soaking of the collapsible loess filling material could also induce settlement in loess soils. Related Articles | Metrics

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Application of Steel Sheet Pile in Deep Silty Soil Foundation Pit HOU Xingli, XIE Suna 2017, 31 (6):  690-692.  Abstract ( 963 )   Save With the increasing demand for the underground space in the urban area, the various supporting systems for the deep excavations are developed and each of the system could be applied for dealing with the specific site geological and hydrological conditions. Both construction safety and the cost are critical to the selection of the appropriate excavation supporting method. The soft mucky soils have adverse geotechnical properties and high construction risk exists in the deep excavation projects in this soil. This paper presents a supporting system using steel sheet piles for a deep excavation project in soft mucky soils in Guangzhou City. The passive zone inside the excavation area was improved so that deformation of the supporting system could be reduced and they were well within the permissible range. Related Articles | Metrics

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A Case Study of the Failure Mechanism and Stability Analysis of Reservoir Bank Slope HU Yang 1, XIONG Lei 1,2, ZHOU Qingyong 1, HONG Wenhao 1,2 , HU Guoping 1,2 2017, 31 (6):  693-696.  Abstract ( 1108 )   Save Based on the investigation of the engineering geological conditions in the reservoir bank slope，the failure mechanism of the reservoir bank landslide has been studied. The physical and mechanics parameters are determined by the inverse analysis method and the engineering geologic analogy method. The safety factors of the slope under different working conditions and parameters are obtained based on the residual thrust method. Finally, the engineering treatment of the landslide has been proposed. Related Articles | Metrics

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The Camber Arch Support for the Broken Roof of a Deeply Buried Roadway YAO Gang， BIAN Jingqiang 2017, 31 (6):  697-701.  Abstract ( 737 )   Save When mining in the deep buried coal seams, the roof of the excavated gallery is usually broken due to the effect of the coal extraction. The broken roof could result in a safety hazard to the safe of the gallery construction. This paper presents the numerical analysis results on the effect of the camber arch support on the stability of the coal extraction galleries using the case history of 143down04 gallery in Dongtan Coal Mine. The results indicate that height of the camber arch has a significant impact on the deformation and stresses in the supporting system. The settlement at the gallery roof decreases with the increase of the camber arch height, but the axial stress and the bending moments in the roof beam increase. The optimized arch height in the case history was determined to be 15 cm. The other parameters for the supporting design was also determined. The settlement observed in the coal roof supported by the camber arches were reduced and the settlement was stabilized in a short period of time. Related Articles | Metrics

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Performance of Hot Rolled Steel Beam Reinforced Soil Cement Mixed Wall Constructed by TRD Method as the Deep Excavation Support in Soft Soils ZHU Hongwei 2017, 31 (6):  702-708.  Abstract ( 898 )   Save Compared with the conventional Soil Mixed Wall (SMW) system as the deep excavation supporting system with excavation depths less than 10 meters, the hot rolled steel beam reinforced soilcement mixed wall constructed by the Trench cutting Remixing Deep (TRD) method has the cost effective as well as the advantages since the TRD wall can serves both the retaining and slurry walls. Similar to other soil cement mixed walls, the wall thickness over the entire length is usually a challenge. The nonuniform TRD walls will certainly affect the supporting performance but the case histories rarely reported. This paper presents the study of the strength distribution within the TRD constructed and hot rolled steel beam reinforced soil cement mixed walls. The impact of the strength variation within the soil mixed wall on the deep excavation supporting system is numerically investigated. It is concluded that the construction quality control during the wall excavation is critical for this type of excavation supporting system. Related Articles | Metrics

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Stability Analysis of Soil Cave in Finite Element Method and Foundation Treatment HU Shuangzi 2017, 31 (6):  709-711.  Abstract ( 897 )   Save The analysis methods on the stability of soil cavities have developed rapidly at both domestically and abroad. The Finite Element Method (FEM) with Strength Reduction Method is frequently used in the stability evaluation of soil cavities. This paper presents the analytical results of FEM with Strength Reduction Method by using PLAXIS on the stability of a soil cavity without considering the effect of groundwater and seepage. The results were also examined by the stability charts developed by Drumm et al through FEM. The results indicate that the FEM evaluation of soil cavity stability with PLAXIS is appropriate. The approach used also improved the charts developed by Drumm et al since no surcharge was considered in the charts. Related Articles | Metrics

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Precipitated Gel at the Spillway Gallery at Dam of Guinea Kaleta Hydropower Station GAO Xiaoyu 2017, 31 (6):  712-715.  Abstract ( 1009 )   Save With the pooling of reservoir of the Kaleta Hydropower Station, the precipitated gel was found to be accumulated at the entrance of the spillway gallery near the base of the dam. The precipitated gel was sampled and laboratorial analyzed for its chemical component; microstructure and item composition. The mechanism of the precipitated material accumulation was investigated from its source and environment. It is concluded that the alkaline water seeped from the concrete dam was from the interaction of groundwater, concrete and soilcrete from the seepage slurry wall. The stability of the dam foundation can be improved by reducing the seepage at the spillway gallery. Related Articles | Metrics

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Karst Sinkhole Occurrences in Lingui New District of Guilin City YU Dongge1, GAO Wuzhen2 2017, 31 (6):  716-720.  Abstract ( 884 )   Save Karst sinkhole occurrences are the results of many potential influential factors. The development of the underground soil and rock cavities is one of the essential factors. The soluble bedrock and the groundwater conditions are the major factors that affecting development of cavities. The degree of karst terrain development, the density of the collapsed sinkholes and the underground soil and rock cavities are the controlling factors affecting sinkhole occurrences. This paper presents the investigation results of karst terrain in Lingui New District of Guilin City. The results can be used in the geological hazards of sinkhole reduction practice. Related Articles | Metrics

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Review of Seepage Models in Fissured Soils GUO Jinxi, YI Yuan 2017, 31 (6):  721-724.  Abstract ( 909 )   Save In the engineering practice such as slopes, highway embankments and bridge projects, the seepage in fissured soils has a coupled effect on the stability, bearing capacity. This paper reviews the advantages and disadvantages of several main seepage models in fissured soils. The equivalent continuum model is the most widely used model. The disadvantages of this model are: inaccurate description of some tensors, such as, geometry parameter of fissured media, effective porosity and effective seepage tensor. The coupled models that starting from the micromechanics have very promising applications. Related Articles | Metrics

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Deterioration of Soil Properties in Residual Soil Slopes under Humid and Low Temperature Environment CHEN Xiaozhen 2017, 31 (6):  725-728.  Abstract ( 922 )   Save Fujian Province is located in the southeast coast of China. Under the humid tropical environment, the weathering of residual soil slopes is common. The weathering will adversely affect mechanical properties of residual soils and further affect the longterm stability and duration of the residual soil slopes. The typical granitic residual soil samples from Fuzhou and Quanzhou were collected and the laboratory simulations of weathering conditions on soil sample from both areas were performed in the test chamber that both the humidity and temperature could be controlled. The effect of low temperature and high humidity environment on the deterioration of the shear strength properties of residual soil samples was investigated. The test results indicate, under the laboratory test conditions, the internal friction angles for both residual soils remained approximately unchanged. The shear strength and the cohesion of soil samples from both areas are reduced in power relationship with time. The degree of strength reduction and the contraction characteristics under low temperature conditions are related to the mineral composition of the soil samples. The weathering deterioration in 〖JP2〗Fuzhou soil samples is slightly greater than those sample from Quanzhou area. Related Articles | Metrics

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Back Analysis and Stability Evaluation of a Xiulingzhongcun Landslide LI Xieneng, JIANG Xuhui, ZHOU Lianyi 2017, 31 (6):  729-733.  Abstract ( 836 )   Save TheXiulingzhongcun landslide is located at the slope area of Baimupu gully in Yangbi River Basin of Lancang River watershed. The landside is a first time occurred slide caused by the tectonic erosion in the deep incised mountain valleys. A detailed geological background and landslide characteristics investigation was performed and the limit equilibrium analysis was conducted. The slide shear strength parameters were obtained. The analytical results concluded that heavy precipitation and the earthquake are the major triggering factors resulting the landslide. The site reconnaissance indicated that the slide is a typical heavy rain induce shallow failure. The caisson and surface drainage structure were used to remediate the failure. Related Articles | Metrics

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Stability Evaluation of a Landslide in Qingxi, Chongqing City LIU Rongcan, YANG Yang， WANG Xianjiu 2017, 31 (6):  734-737.  Abstract ( 1499 )   Save This paper presents the comprehensive stability evaluation results of a landslide in Qingxi, Chongqing City. The site geological conditions, geotechnical properties, potential contributing and triggering factors were investigated in detail. It is concluded that the Qingxi landslide was the results of the combination actions of heavy precipitations, river erosion and human activities. The weak zone formed by the daylighting sandstonemudstone weak zones and the unloading at the front of the slide are the main triggering factors. The limit equilibrium analysis under various conditions indicate that the stability of the site slope under the adverse effect of the heavy rain, raise of reservoir water level and human activities was compromised and the stability state changed to instable. The analytical results provided the basis for the slope stability mitigation measures. Related Articles | Metrics

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Optimization of Supporting Strength Parameters for TBM Section of a Water-Carrying Tunnel of N-J Hydropower Station in Pakistan PENG Huichun 2017, 31 (6):  738-742.  Abstract ( 986 )   Save In order to solve the problem of soft rock deformation in the construction stage of a deep buried watercarrying tunnel of NJ Hydropower Station in Pakistan, a combined approach consisting of indoor rheological test, field monitoring and rheological parameter inversion was used to evaluate the tunnel supporting strength parameters of the TBM construction section (NJTBM) in NJ Hydropower Station. And the existing supporting systems at different depths of NJTBM in different types of surrounding rock were optimized by the numerical simulation and capacity checking. It is proposed to increase the thickness of concrete in Type Q5 surrounding rock mass and fault extrusion section to improve the safety and stability in the construction of NJTBM tunnel. This measure also provided as reliable technical basis for the construction of the project. Related Articles | Metrics

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Integrated Design Analysis of a Subway Station and the Structures Above 2017, 31 (6):  743-746.  Abstract ( 846 )   Save The integrated design of the subway and the structure above it should consider not only the feasibility of the project, but also the overall coordination of the landscape design. At the same time, it is also necessary to maximize the commercial value of property above. In this paper, the subway station of Nanjing Metro and the property above the station was studied as a case history considering the combination of the design and construction of subway and the property of above the station and the integration of four small structures above the ground. The results show that, in the early concept design stage and the final engineering development stage, reserve enough flexibility of the property above can results in a better property development after the subway construction. Related Articles | Metrics

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Tunnel Excavated by the Double Side Drift Method BAI Chuanpeng1,2, WANG Xingchang3, ZHANG Qingguang3, Wang Yong2, CAI Zijian2 2017, 31 (6):  747-752.  Abstract ( 1423 )   Save The mechanical characteristics of the shallow buried large span and unsymmetrical tunnel construction with imbalanced pressures could be very complicated since its surrounding rock could be very easily to cause the stability issue and even lead to tunnel collapse under the different construction activities. In order to analyze the excavation process of the ultrashallow buried, largespan & bias tunnel with the double side drift method, a threedimensional model of the tunnel was established using the commercial finite element software ABAQUS. The stress and displacement fields of the surrounding rock mass as well as the stress features of the supporting structures were studied during the excavation. The results show that: (1) the settlement ratio between the ground surface and the vault at the same section is close to 1, and the settlement of monitoring points in deep buried side of the tunnel is larger than those of in the shallow depths; (2) during the excavation, the stress of the surrounding rock mass changes constantly;  the surrounding rock mass at the vault of tunnel, the middle and bottom of the arch of the deep buried side have greater tensile stress, whilst those at the both side walls, and the middle of the arch of shallow buried side have a greater compressive stress; (3) when the benches of the both headings are excavated, the plastic area comes into being in the middle core soil of the tunnel; (4) the force of first lining changes continuously in process of the excavation; when the whole section of the tunnel is closed, the tensile stress concentration occurs mainly at the arch bottom and vault, whilst the smaller tensile stress occurs at the arch bottom of the second lining. Related Articles | Metrics

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Numerical Simulation of Water-increased Expansion of Expansive Soil in Hefei FAN Congyou 2017, 31 (6):  753-757.  Abstract ( 903 )   Save The swelling stress field caused by the change in the moisture content in expansive soils will lead to an adverse effect on the behavior of retaining structures of tunnels and deep excavations. Based on the similarity of relevant theoretical expressions of thermal field and moisture field, the water absorbance induced expansion can be simulated by the temperature induced expansion in which the thermal expansion coefficient, α, and the thermal conductivity coefficient, λ, need to be firstly backanalyzed. A series of swelling force tests and surface wetting tests were conducted on the expansive soil samples taken from three typical strata in Hefei. The relationship between the swelling force and the initial moisture content and the empirical relations between the moisture content and the infiltrating time were established. Then the axisymmetric numerical model was established to simulate the swelling force test and the surface wetting test through thermalmechanical coupling analysis. Both the numerical simulations and the laboratory tests resulted in consistent results and the thermal expansion coefficient and thermal conductivity coefficient could be statistically back analyzed. The backanalyzed parameters could then be used in further analysis of tunneling and excavation engineering in expansive soils considering waterabsorbance process. Related Articles | Metrics

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Triaxial Test of the Dynamic Response of Soft Clay Samples under Various Impact Loads KANG Wenwu 2017, 31 (6):  758-761.  Abstract ( 852 )   Save This paper presents the laboratory test results of the dynamic response of soft clay samples under dynamic load and undrained conditions by the improved static and dynamic true triaxial test system SPAX2000. The typical soft clay samples (moisture contents between 50% and 68%) were under various cell confining pressures (100 kPa, 150kPa and 200 kPa) and tested with different loading frequencies (1 Hz, 5 Hz and 10 Hz). The following conclusions can be obtained: within the shock loading consolidation stage, under the same cell confining pressure and different loading frequencies, the peak value of the deviator stress and the axial strain decrease with the increase of loading frequency; under the same loading frequency and different cell confining pressures, the peak value of deviator stress increases with the cell confining pressure; and the axial strain decreases with the cell confining pressure. The relationship between the rate of the deformation modulus increase and the number of dynamic loading are established from the test results. The application range of this empirical relationship is also provided in the paper. Related Articles | Metrics

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Experimental Study on the Unconfined Compressive Strength of the Compacted Cement Mixed Soil Sample with Short Curing Age GAO Jianxi, HE Jie, WANG Ren 2017, 31 (6):  762-765.  Abstract ( 730 )   Save The laboratory experimental studies of the unconfined compressive strength of the saturated compacted cement mixed soils with short curing age. The relationship among the compressive strength of the samples, curing age and cement to soil ratio are investigated and the empirical correlations are obtained. The axial stress strain relationship of the cement mixed soils with the curing ages and the failure modes are examined. The results can be used in the engineering applications. Related Articles | Metrics

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Curtain Grouting Tests of Fracture Rock Mass SUN Xiaodong 2017, 31 (6):  766-770.  Abstract ( 915 )   Save In order to verify the feasibility of the curtain grouting to improve the performance of the seepage control in the fracture rock zone, the field grouting tests were performed. The grouting test used diamond bit, rotary drilling, the inner circulation, topdown segmentation and grouting method. The rock core sampling and water pressurizing tests indicate that the grouting method was appropriate and the seepage of the fractured rock zone was able to reduce. The test results indicate that the row spacing of the curtain grouting should be smaller than 1.7R, where R is the radius of the grouting slurry penetrating distance, and the borehole spacing should be les 1.5R. different grouting tests were performed for the selection of grouting materials, sequence and grouting slurry penetrating radius. Related Articles | Metrics

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Discussions on the NonDefective Factors of the Bored Pile Detection by Crosshole Sonic Logging MENG Xinqiu, MA Jian, LIU Li 2017, 31 (6):  771-774.  Abstract ( 796 )   Save Based on the actual project case histories, this paper discusses the nondefect factors encountered in the data acquisition and the integrity judgment process in the concrete integrity inspection of bored piles by the Cross-hole Sonic Logging method. The acquisition of the sonic velocity value is affected by the change of ‘zero sound’ and the tube spacing. The acquisition of the amplitude value is affected by many factors, such as, the instrument system performance, the transducer coupling status, the pipe distance, the transducer transmit and receive angles. During the test, the operator must ensure that the transducer probes are in the ideal positions and pull the rope smoothly and slowly. Further, the possible slip of wheel that are used for counting distance should be noted in winter seasons. In the data processing, the weld joints, elbow locations and the continuous lower than threshold value of the sonic velocity can easily lead to the misinterpreted results and further data acquisition are necessary. Related Articles | Metrics

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Field Tests of Cement Stabilized Soft Soils for Utility Tunnels JIANG Nanning, YOU Yi 2017, 31 (6):  775-778.  Abstract ( 823 )   Save The soft soils improved by the cement agents have received different results due to the significant variation of the components and sedimentary environments of soft soils in different regions. This paper presents the field test results of soft soil mixed with different content of cement for the utility tunnel construction project in a coastal city. The performance of the utility tunnel in soft soils before and after the improvement was also analyzed by using finite element method. The test results indicate that the wet mixing method is more appropriate to apply the cement in the onsite soft soil strata. The compressive strength of cement mixed soil increases with the cement contents. The most costeffective cement content is 25%. The numerical analysis results indicate that the utility tunnel would have a tension failure potential and the performance of the utility tunnel after the soil improvement is satisfactory. Related Articles | Metrics

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Lateral Earth Pressure Measurement on the Pile-Soil Interface for the Jacked Pile Installation Using Silicon Piezoresistive Sensors WANG Yonghong1,2 , ZHANG Mingyi1, 2 , SANG Songkui1,2 , MIAO Dezi1,2  2017, 31 (6):  779-782.  Abstract ( 788 )   Save Silicon piezoresistive sensors have the characters of having high sensitivity, high accuracy, high dynamicfrequency, wide measuring range and small size. These characteristics can be used to monitor the jacked pile installation. The silicon piezoresistive earth pressure sensors and pore water pressure sensors were used to test lateral pressure and pore water pressure at the interface between the pile and the soil. The test results show that the silicon piezoresistive sensors can be used to monitor the jacked pile installation for they can accurately measure the lateral earth pressure and the pore water pressure at the interface between the pile and the soil at various installation depths. Related Articles | Metrics