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20 June 2013, Volume 27 Issue 3 Previous Issue    Next Issue

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The Application of a Double Half-Ring Supporting Structure in the Deep Excavation in Soft Soils ZENG Huajian, WANG Zhanpeng, WU Chuanqing 2013, 27 (3):  1-4.  Abstract ( 2023 )   Save The double halfring supporting system is a new type of deep excavation supporting structure. It has received a wider application in the complicated urban environment and the adverse subsurface conditions. This paper presents a case history using this supporting structure in the deep excavations in Zhongshan soft soils. The technical aspects of structure are also introduced. Related Articles | Metrics

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The Supporting System for a Deep Excavation Design FAN Lian, WANG Xingyun, TANG Xiaochao 2013, 27 (3):  5-6.  Abstract ( 2123 )   Save This paper presents a case study of the supporting design for a deep excavation. The geotechnical design parameters are obtained through a thorough investigation of the site topographical, geotechnical and hydrological conditions in combination with insitu and laboratory test results. The final supporting system selected was the rotary drilled and cast-in-place soldier piles plus three layers of reinforced concrete beam supports. The jet grout was utilized to seal off groundwater among soldier piles. The paper also briefly introduces the deep excavation construction and the site monitoring program. Related Articles | Metrics

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Applications of Deep Dynamic Compaction in Eliminating the Collapsible Potentials of Loess Soils XU Shuanqun 2013, 27 (3):  7-9.  Abstract ( 2155 )   Save This paper presents a case of using Deep Dynamic Compaction (DDC) method in the eliminating of the wetting collapse potential of the collapsible loess. For the important building structures over the collapsible soils, the collapsible potential is to be completely eliminated and bearing capacity of the treated soils needs to be improved. The paper demonstrates the treatment results. Related Articles | Metrics

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Soil Improvement Techniques in Xinjiang Saline Soils SHI Zhaoqing1, LIU Junyong2 2013, 27 (3):  10-12.  Abstract ( 2095 )   Save The saline soil distribution and its regional characteristics in Xinjiang are investigated and analyzed in this paper. The soil improvement techniques for the highway projects in saline soils are proposed. Case histories of the soil improvement in saline soils are also presented. Related Articles | Metrics

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Application of Rotary and Percussion Drillings in Bored Cast-in-Place Piles in Karst CHEN Fei1，CHEN Huaren2, WANG Zhaohui3 2013, 27 (3):  13-15.  Abstract ( 2409 )   Save The subsurface conditions of the Taoyuanchun Residential Development are complicated. The bored castinpace piles are to be installed in the highly developed karst terrain with rock caverns and pinnacles. The combination of rotary and percussion drilling techniques are used found to be the optimum installation method. This paper summarizes the construction techniques of this combination method. Related Articles | Metrics

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Rainfall Infiltration on the Stability of the No.2 Landslide at Sichuan Tibet Highway XU Guotao1,WANG Peiqing1,2,HE Qiang1, LU Wenbin1 2013, 27 (3):  16-19.  Abstract ( 2118 )   Save The 102 Landslide Group is located in Yigong Town, Bomi County of Linzhi, Tibet. They are on the right bank of Purlung Tsangpo River, which is the first tributary of Brahmaputra River. This landslide group is near the 102 Service Station of SichuanTibet Highway, and is about 60 km to the east of Bomi and 100 km to the west of Linzhi. The No.2 Landslide has the largest scale among this landslide group. The laboratory testing, such as, grain size distribution, Proctor test, permeability and direct shear tests are performed on samples from the landslide zone. Both the tests results and the FLAC3D numerical simulations show that the failed body is composed of glacial moraine and alluvial deposits. The rainfall is one of the main factors triggering the landslide. Related Articles | Metrics

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Analyses of Cement Mixed Walls in Deep Excavations XU Guangbing, SHI Huanhuan, HAN Chenwei, WANG Bangyuan 2013, 27 (3):  20-22.  Abstract ( 2089 )   Save With the rapid urban developments, more and more highraised buildings are constructed in the limited urban areas. There is a trend to utilize the underground spacing for these highraised buildings. As a result, the supporting demand for the deep excavation is ever increasing. There are many supporting techniques and their associated design methods available. For a specific deep excavation project, the selection of the supporting method and the appropriate design method are among the first objective. This paper presents a case history of using the cement mixed wall for a deep excavation supporting system. The subsurface conditions, the adjacent construction environment for the proposed deep excavation site as well as the stability analysis of the proposed excavation are introduced. Related Articles | Metrics

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Stability Analysis on the North Slope for Tank Farms at CNPC's Xingang Site LIU Tianyu 2013, 27 (3):  23-25.  Abstract ( 1950 )   Save A high slope of China National Petroleum Corporation (CNPC) International Reserve tank farm in Xingang, Dalian is at the north of the site and is adjacent to the Xingang Port. The total length of this slope is 1210 meters and the elevations at the crest of the slope are greater than 30 meters with a maximum elevation of 107.8 meters. The elevation changes in the crosssectional directions are also large. The inclination of the rock joints is unfavorably daylighted to the slope; further, there is a loose and broken bedrock zone at the top. Both limit equilibrium based circular slicing and the finite element analysis based strength reduction methods are utilized to evaluation the stability of this slope. The results indicate that the circular slicing method could not accurately determine the potential sliding surface and the results are not reliable. The strength reduction method results indicate that the slope stabilization mitigation measures are necessary. Related Articles | Metrics

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The Application of Dynamic Compaction in the Thick Boulder Fills LIANG Zhenglin, WEI xingbiao, LI Jiachu 2013, 27 (3):  26-28.  Abstract ( 2279 )   Save This paper presents a case history of the application of dynamic compaction in the large battery factory foundation constructions over the thick newly filled materials. The fill material consisted of medium consistency silty clay, strongly to moderately weathered sandstone and sandy claystone fragments. The average grain size of the fill materials is between 500 and 800 mm with a localized large size ranging from 1200 to 1800 mm. The thickness of the newly filled material is between 3.5 m and 21.5 m. The paper introduces the dynamic compaction procedures in these fills. Related Articles | Metrics

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The Design of the Composite Soil Nailed Walls as Deep Excavation Supporting System ZHOU Shudong 2013, 27 (3):  29-32.  Abstract ( 1919 )   Save The composite soil nailed walls are widely used as the supporting system of deep excavations due to its cost effective, simple construction procedures as well as effective for a wide spectrum of soil materials. This paper introduces the state of the practice of the soil nailed wall constructions as well as the application aspects of different composite soil nail walls. Related Articles | Metrics

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Analysis and Mitigation of a Slope Failure at K1527+650 in Yong-tai-wen Expressway WANG Jianlin1, WEN Renxia1, WANG Huajun2 2013, 27 (3):  33-35.  Abstract ( 2318 )   Save A slope failure occurred at NingboTaizhouWenzhou Expressway Station K1527+650 on August 8\+\{th\}, 2012 and the traffic was interrupted. This failure was triggered by the 11\+\{th\} strong typhoon "Haikui". Based on the field investigation and analysis, the failure mode was determined to be the surficial failure in the loose overburden materials. The emergency mitigation as well as the permanent stabilization measures were proposed and implemented. Related Articles | Metrics

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Stability Analyses of a Landslide XU Xiang 2013, 27 (3):  36-37.  Abstract ( 2278 )   Save This paper presents the geotechnical conditions of a landslide mitigation project. The global stability factor of safety is calculated under different boundary conditions. The factors that are most sensitive to the stability factors are selected throughout the parametric studies. Related Articles | Metrics

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Mitigation of Collapse in the Soft and Hard Rock Transition Zone in Renge Tunnel XIONG Yanhui 2013, 27 (3):  38-40.  Abstract ( 2030 )   Save Due to the different degrees of weathering and the tectonic structures of the rock mass, the nonuniform strength in the rock mass is commonly encountered in the tunneling engineering. The variation of the rock mass strength might cause great difficulties for the tunnel construction. This paper presents a case study of mitigation of a large scale tunnel collapse in the Renge Highway Tunnel of ShuangYong Expressway in Longyan City, Fujian Province. The collapse occurred in August 2010 at the soft rock mass zone. The mitigation techniques involved using steel H beams placing at the arch of the tunnel and using small diameter casing in the aheadgrouting supporting. Related Articles | Metrics

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Application of the Lean Concrete in the Hambantota International Airport YANG Hailiang1, WANG Zhengliang2, YUAN Jingbo2 2013, 27 (3):  41-43.  Abstract ( 2034 )   Save This paper introduces the mix design and the strength requirements of the lean concrete that is used in the construction of the Hambantota International Airport project. The construction characteristics of lean concrete as the cushion layer and its Quality Assurance and Quality Control procedures are also discussed. Related Articles | Metrics

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Contact Effect of the Interfaces between Soft Soil and Large Diameter Cylindrical Jetty HOU Hongwei1, FAN Qinglai2 2013, 27 (3):  44-46.  Abstract ( 1982 )   Save The elastoplastic finite element analyses are performed to study the impact of soilstructure interface on the performance of a large diameter cylindrical jetty in soft soils under the cyclic wave pressure. The soft soils are modeled with the modified CamClay model. Related Articles | Metrics

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Applications of Piled Raft Foundations Considering the Pile-Soil Interaction TAN Fang1, YANG Xiaoping2 2013, 27 (3):  47-49.  Abstract ( 1731 )   Save In the conventional design approach of the piled raft foundation, the structural loads are completely carried by the piles and the contribution of the bearing capacity by the soils is usually ignored. The new approach considers the soil bearing resistance and leads to the reduction of the number of piles. It has an obvious cost advantage. Related Articles | Metrics

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Developments of the Tiered Wall with Anchor Pile System for Deep Excavation Support XIAO Rongjun, SHI Hongyan, YANG Xueqiang 2013, 27 (3):  50-53.  Abstract ( 2280 )   Save This paper presents a literature review of the development of the tiered wall with anchor pile system for the deep excavation support. Various earth pressure estimation methods for this system are reviewed in the paper. Different design analysis results from the assumptions of rigid supporting structures and structures with deformed anchor piles, walers and supporting components are also presented. Related Articles | Metrics

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The Evaluation of Mine Rock Slope Stabilities LIU Pan, TU Lidong 2013, 27 (3):  54-58.  Abstract ( 1999 )   Save With the economic development, the ecological, geological and environmental problems are becoming an ever increasing concern. The stability of the mining slopes is a very important engineering problem. In this paper, the reliability evaluations are performed on the mine material slopes using conventional force limit equilibrium and point estimate methods in a mine in, Hubei Province. Both the factors of safety and the reliability indices are obtained throughout these analyses. The finite difference numerical analysis models are also established using software FLAC3D. The displacement and the rate of the deformation of the slope are evaluated and the factor of safety is also obtained through the numerical analysis. The factors of safety are also analyzed by different limit equilibrium methods, such as, Swedish, Biship and Janbu methods. The results indicate that the engineering geology environment factors, such as, cohesion, internal friction angle and the unit weight, have large impact on the stability of the slope. The numerical analysis results by FLAC3D are consistent with the other simplified analytical results. Under the special environment of in the mining area, the point estimate method can effectively avoid the errors originated from the uncertainties. The simple analytical approach and reasonable results have a significant advantage over other methods. It is also concluded that, for a complicated slope problem with higher requirement, multiple analyses are desired in order to result in the reliable conclusions. Related Articles | Metrics

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Back Analysis Method for the Strength Parameters of a Sliding Surface NA Yunlong 2013, 27 (3):  59-61.  Abstract ( 1759 )   Save According to the requirements in Section 5.2.7.3 of the new "Geotechnical Engineering Investigation Specifications (GB50021-2009), the back analysis should be used to examine the strength parameters of the sliding surface. However, the specifications do not explicitly suggest the back analysis procedure. This paper presents a case history of the application of the back analysis method in determining the strength parameters of a sliding surface. It is concluded that the appropriate strength parameters could be obtained by the combination of back analysis and the stability analysis of the sliding surface. Related Articles | Metrics

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Major Factors that Control the Landslide in the Mountain Areas CHENG Jiangtao, CAI Qing, CHEN Xinxin 2013, 27 (3):  62-65.  Abstract ( 2280 )   Save The form of a landslide is a combination of internal static intrinsic factors and the external dynamic triggering factors. For the internal intrinsic factors, the impact of the topographic, tectonic and lithological conditions on the landslide development is different.  A thorough analysis the relationships among these factors are important to the reveal of the mechanism, forecast as well as mitigation of the landslides. This paper presents the investigation results of 51 landslides in Tongren Prefecture, Guizhou Province. The eight (8) factors: the topography of the slope, slope angle, elevation difference, lithology underneath the potential sliding body, bedrock inclination, geological structure of the sliding area, thickness of the sliding body as well as the inclination angle, are analyzed by using the principal factor method. The influence of each factor is able to be quantified; therefore, the weighted influence factor is assigned to each factor. A landslide evaluation model in Tongren Prefecture is established on the principal influence factors. The results indicate that the following six (6) factors:  the topography of the slope, the inclination angle, slope angle, elevation difference, lithology underneath the potential sliding body, and bedrock inclination, are the principal influence factors in the landslide in the Tongren Area. Among these principal factors, the sliding body factors (lithology underneath the potential sliding body, the inclination angle and the geological structure of the sliding area) are the first and primary controlling factors. Whereas, the slope surface factors (the topography of the slope, slope angle and the elevation difference) are the secondary factors.  The sliding surface factor (inclination angle of the sliding body) is the third controlling factor. Related Articles | Metrics

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Analysis of Failure Mechanisms of Tunnels in Jointed Rock Mass CHEN Gaokui, LIU Chengyu, ZHANG Zheling, WU Kelin 2013, 27 (3):  66-69.  Abstract ( 2369 )   Save The failure mode of tunnels in the jointed rock mass has a close relationship with the rock joint characteristics. Based on a jointed rock mass model of a tunnel project in Fujian Province, the discrete element method was utilized to establish the failure mode of tunnels in jointed rock mass with various dip angels, rock fragment strengths, joints strengths, buried depths and joint spacing. The following results can be concluded: 1) the failure direction of tunnel in jointed rock mass is governed by the dip angle of the joints; 2) the rock fragment strengths, joints strengths and buried depths have an effect on the degree of damage of tunnels in jointed rock mass; 3) the joint spacing also might have an effect on the degree of damage of the tunnel. Related Articles | Metrics

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Geotechnical Investigation Aspects on the Deep Excavations in Wuhan Urban Areas XU Shuichao, LIU Xiuzhen 2013, 27 (3):  70-72.  Abstract ( 1954 )   Save This paper presents the technical aspects of the geotechnical report preparation for the deep excavation in Wuhan urban areas. Key parameters that might affect the excavation supporting design are also discussed. Related Articles | Metrics

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Application of the Fuzzy Comprehensive Evaluation Method in the Risk Assessments YIN Liang,LIANG Hongqin 2013, 27 (3):  73-75.  Abstract ( 1820 )   Save Engineering project risk assessment is a rather complicated work, which includes many uncertain factors. Hence, it is different for an accurate comprehensive approach using quantitative method. Due to the complexity, fuzziness nature of the risk assessment, the evaluation presented in this paper selects the major parameters that affect the projects risk. The index weights at all levels are determined by using the principal component analysis (PCA) method and these weights are used in a comprehensive fuzzy risk evaluation. The evaluation results indicate that the fuzzy evaluation method in the risk assessment is feasible. Related Articles | Metrics

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Forecast of the Instability of Surrounding Rock Mass in Tunnels in the Mountain Areas ZHUANG Shaoyong1,2 2013, 27 (3):  76-79.  Abstract ( 1900 )   Save The Daqiulin 2nd Tunnel is a separated bidirectional fourlane highway tunnel. Due to the unfavorable geological as well as topographical conditions, the potential construction interruptions resulted from the instabilities of the rock mass, could have lengthened the construction schedule and increased the investment. During the construction of this tunnel, the instability of the rock mass was forecasted with the both the Tunnel Seismic Prediction (TSP) form the long distance and the Ground Penetrating Radar (GPR) in the short distance. The deformation of the tunnel roof and the surrounding rock mass; the stresses in the supporting system and in the rock mass were also monitored. The construction safety is able to be warranted. Related Articles | Metrics

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Estimating of the Axial Nailing Stress in Soil Nailed Walls CAO Jie, XIAO Minggui, XU Xiaohu 2013, 27 (3):  80-82.  Abstract ( 2139 )   Save The axial nail stresses in the soil nailed walls are estimated using the incremental method that considering the soil excavation and other construction process. The analysis results are consistent with the monitored values. Related Articles | Metrics

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Prediction of Pavement Performance Based on the Back Propagation Neural Network HAN Yanhua 2013, 27 (3):  83-85.  Abstract ( 1701 )   Save This paper discussed the deficiencies existed in the current pavement performance prediction methods and establishes a new performance prediction model based on the neural network theory with back propagation (BP) algorithm. The model uses the temperature, humidity and traffic volume as the influence factors and rate of pavement damage, deflection as the pavement performance prediction indices. This model was applied to five existing roads which have extensive data collected. The results are satisfactory. Related Articles | Metrics

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The Engineering Geology of Fluvial Plains of Shihezi and Its Investigation YANG Hailiang1, CHENG Jianjun2, LIU Yi2 2013, 27 (3):  86-88.  Abstract ( 1959 )   Save Based on the practical experiences in geotechnical investigations of the fluvial plains in Shihezi, the characteristics of topography, geomorphology and groundwater conditions are summarized in this paper. The soil improvement alternates and the geotechnical investigation techniques are also suggested. Related Articles | Metrics

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Impact of the Soil Lateral Displacement on the Performance of the Adjacent Composite Ground ZHANG Jingyao1, QIAO Jingsheng2, LIANG Lejie3 2013, 27 (3):  89-93.  Abstract ( 2094 )   Save This paper presents the finite element analysis results on the impact of soil lateral displacement on the performance of the adjacent composite ground. The composite ground consists of cementflyashgravel (CFG) columns. Under the lateral deflection, the response of the column and the soil between columns as well as the stress distribution are analyzed. The formula of estimating the column lateral deflection by considering the excavation depth and distance from the CFG column is also proposed. Related Articles | Metrics

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Design of Groundwater Cut-off Curtain in Deep Excavations WANG Xiaoxia 2013, 27 (3):  93-95.  Abstract ( 2558 )   Save The groundwater cutoff curtain is one of the important aspects in the design of deep excavation supporting system. This paper introduces the type of cutoff curtains that applied in the deep excavation engineering; these types including: cement mixed soil columns, jet grouts, and pressure grout formed curtains. The major design parameters as well as the commonly encountered problems and their solutions in each type of the curtain are also introduced. Related Articles | Metrics

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Deep Excavations in a Soft Clay Site in Sanmen Nuclear Power Plant LI Fan 2013, 27 (3):  96-99.  Abstract ( 2395 )   Save The circulation water discharge  culvert in Sanmen Nuclear Power Plant is within the thick soft soils. It is characterized as having a complicated geotechnical conditions, long total linear length and the variation of the box width. Three deep excavation alternates are used: anchored soldier pile and lagging wall, soldier pile plus rake and gravity wall. A slurry wall is formed by using the jet grout between the soldier piles. The transporting of the excavated soils is through the artificial island. The construction and the safety of the excavated area is warranted through an integral system consisting of supporting piles, slurry wall as well as foundation structure piles at the bottom. The paper also presents the results of the construction optimization of the installation sequence. Related Articles | Metrics

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The Fabrication of Large Diameter Long Segment Concrete Pipe Piles ZHANG Junjuan1，FAN Jinguang1，LI Chaoxiong2 2013, 27 (3):  100-103.  Abstract ( 2351 )   Save The post tensioned, prestressed concrete pipe piles made with posttension method have been widely used in China for almost 30 years. However，Due to the limitations of then technology and manufacture equipment, the performance of these piles is not completely satisfactory. Currently, the hydraulic engineering projects demand better performed posttensioned piles. More and more innovative ideas are applied in the fabricating and engineering applications in the large diameter and long segment posttensioned, prestressed concrete pipe piles. These piles are different from the conventional prefabricated concrete piles in many aspects since it is a systematic framework. The manufacture of the large diameter and long segment pipe piles requires carefully planning starting the design, fabricating, splicing, storage and transporting as well as quality assurance and quality control. Related Articles | Metrics

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Research on The Geotechnical Problems Of Metro Line 2 In Wuhan City He wen hua1， Li wei zhong2 2013, 27 (3):  104-107.  Abstract ( 2145 )   Save Due to the complicated engineering geological conditions along the metro line 2 in wuhan, , a lot of geotechnical engineering problems occuered in in the route reconnaissance, design and construction. The main geotechnical problems such as soft soil, newly despoited soil , groundwater, krast based on the detailed engineering geological conditions, and summarize the reasonable measures to solve these problems, which could provide certain reference for future similar construction. Related Articles | Metrics

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Role of Steel Reinforcement in the Grouted and Geotextile Tube Reinforced Gravel Columns TANG Xin1, GU Xiangsheng2 2013, 27 (3):  108-110.  Abstract ( 1898 )   Save There are two types of grouted, geotextile tube reinforced gravel columns: columns with or without steel reinforcement. The role of steel reinforcement is studied throughout the insitu loading tests. A total of eight columns are divided into groups with/without reinforcements for the comparative studies. The test items are: column integrity tests with low stress wave reflection method, unconfined compressive tests on grouted samples cored from the columns as well as vertical and horizontal loading tests on the single columns. The results indicate that the steel reinforcement has a positive influence on the column integrity and the introduction of grouting tubing simplifies the construction procedures. The steel reinforcement has limited impact on the axial capacity, but it has a significant impact on the lateral load resistance. Related Articles | Metrics

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In-situ Shear Test Studies on the Expansive Rock and Soil in Chengdu Area QIAN Xiao1, ZHU Lianhua2, CHEN Huixian2, LI Tao2 2013, 27 (3):  111-113.  Abstract ( 1875 )   Save Both the shear strength indices and the stressstrain characteristic of the expansive soil and rock materials in Chengdu Wangjiangjinyuan are studied by the in-situ pressure-shear tests and horizontal shear test. The test results show that, under the same normal stress, the soil samples from deeper depths which has less influence by the precipitation has a higher shear strength and much larger shear strength indices than samples from the shallower depth. The shear strength values have strong correlations with the water content of the soil samples. It is concluded that the importance of control the water content during the construction. Related Articles | Metrics

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Water-Fill Method in the Measurement of the Degree of Compaction of Soils with Large Grain Size CHEN Jiaqiong 2013, 27 (3):  114-116.  Abstract ( 3557 )   Save The site for the Coking Coal-Electricity-Steel integration project in Panxian County, Guizhou, is required to have high cut and high fills. The fill area is improved by the dynamic compaction and the degree of compaction after the compaction should be greater than 97% of the maximum dry density. The water-fill method is used for the in situ density test. Comparing with the laboratory Proctor test results, it is found that the in situ testing is more realistic since soils with grain size larger than 40 mm are removed in the Proctor test. Related Articles | Metrics

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Application and analysis of in-situ test & laboratory soil test in the soft soil layer HE Jinmei1, ZENG Sujuan2 2013, 27 (3):  117-119.  Abstract ( 1947 )   Save The engineering properties at a soft soil project site were tested by both insitu and laboratory testing. The results indicate that the in situ testing results are more reliable. The factors that affect the accuracy of the results are also discussed. Related Articles | Metrics

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Deformation Monitoring and Analysis of Manmade Hills on Soft Soils in Wuhan HUANG Wei, XIE Zhinian 2013, 27 (3):  120-123.  Abstract ( 2159 )   Save Currently, there are few construction experience and design procedures for the large scale manmade hills on soft soils. This paper presents a case history of a manmade hill project in Wangjiadun Theme Park. The soil improvement design as well as the manmade hill construction is introduced in details. A geotechnical instrumentation program was implemented during the construction.  The vertical and lateral deformation of the ground surface, lateral deflection at various soil depths, excessive pore water pressure, total soil stress as well as the groundwater surface are monitored. The results indicated that the sand/gravel drains plus dynamic compaction and surcharge method receives a satisfactory result. The results also show that large lateral deformations are recorded at the intersection area of two hills. A stress concentration zone is observed at depth of 8 meters below the hill. Related Articles | Metrics

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Studies on the Compaction Properties of Low Liquid Limit Silty Soils YAO Caixia1, YAO Xiao2 2013, 27 (3):  124-126.  Abstract ( 2106 )   Save Throughout a series of compaction tests on different soil samples, the family of dry density curves of the low liquid limit silty soils is developed in order to study the compaction mechanism of these soils. The test results show that: there is a significant amount of the air existing in the pore voids of the silty soils so that they are not really well compacted. It is also necessary to replace the traditional method of compaction with more effective vibratory compaction method or to mix the silty soils with the finer particles so that the soil properties could be improved. Silty soils are very sensitive to water content. A strict control of the moisture content during the construction is necessary. Related Articles | Metrics

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Methods that Estimating the Side Frictions from the Portion to be Excavated in the Pile Axial Static Loading Tests HONG Changdi 2013, 27 (3):  127-129.  Abstract ( 1558 )   Save This paper presents three methods of estimating the side frictions from the port of the pile that to be excavated during the construction. Both advantages and disadvantages of these methods are discussed. Related Articles | Metrics

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On the Application of Magnetic Method in the Steel Reinforcement Cage Length Determination Yao Liming 2013, 27 (3):  130-131.  Abstract ( 2289 )   Save This paper discusses the impact of the steel reinforcement length on the axial capacity of the pipe piles. The need of steel reinforcement length detection during the construction is also discussed. As an example, the feasibility and the accuracy of using magnetic method in the steel reinforcement length detection are presented. Related Articles | Metrics

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In Situ Test Results of Basaltic Residual Soils DU Peng 2013, 27 (3):  132-134.  Abstract ( 1841 )   Save The thickness of the residual soils is related to their deposition locations: erosions are severe at the top of hills and the thickness is smaller whereas a thicker deposit can be found in the valleys. This paper presents a case study of the residual soils in Bijie-Weining Expressway construction project in Guizhou Province. The in situ tests, such as, light dynamic penetration test, shear wave velocity test, are performed in the strongly structured residual soils. Related Articles | Metrics