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The Application of the Soil Nail Reinforced Slope and the Anchored Pile Structure in a Complex Deep Excavation ZHOU Peifeng1,ZHANG Yundong2 null    2012, 26 (5): 1-3.   Abstract （3446）            Knowledge map    A combination of soil nailed upper slope and anchored pile wall for the lower wall was applied to the foundation pit excavation. The proportion of upper slope and lower wall was optimized by global stability and external stability analyses.  During construction, with strict QA/QC, detailed plan for emergency response and close field instrumentation, the monitored movement of the slope and the wall was kept below target value. Related Articles | Metrics

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Geological Investigations of Cement Production Line andKarst Features in Central South Shangdong JIANG Wenfu1, HOU Fang2, WANG Hongbo1, SUN Wenlai1, YANG Yongqiang1 null    2012, 26 (6): 80-83.   Abstract （2299）            Knowledge map    Typical regional engineering geological characteristics and karst features of the proposed six (6) large dryprocess cement production lines in the rolling hills of central south Shangdong are introduced in this paper. The Karst development features of these sites are summarized based on the test borings and test pits. The physical and mechanical properties of soils between the rock pinnacles are statistically analyzed. As a result of these analytical works, geological investigation methods in the Karst terrain are proposed. Related Articles | Metrics

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Stability Analysis and Mitigation Solutions of a Landslide at Shiqian Springs Road in Guizhou MA Ning， ZHAO Yejiang null    2014, 28 (5): 16-19.   Abstract （1615）            Knowledge map    The case history of a landslide at Shiqian Springs Road in Guizhou is presented in this paper. The site environmental geology conditions, geotechnical information of the subsurface conditions are analyzed based on the site specific investigation dada. The stability analyses along different soil strata are performed by using block failure method. The factor of safety of the site is obtained as a result of the analysis and the mitigation measures are proposed. The investigation results indicate: The slope is located on a daylight site. During the long construction period and under prolonged heavy precipitation, the unit weight of the surficial soil is increased and the shear strength of the sliding surface is also reduced, therefore, the geological hazards, such as landslide, might be triggered. Related Articles | Metrics

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The Evaluations of the Highway Embankment Settlements WANG Bing1, ZENG Chao2 null    2011, 25 (6): 35-.   Abstract （2723）            Knowledge map    In this paper, the case study of the highway embankment settlement monitoring and evaluation are presented. The distribution of the settlement monitoring points is first introduced. The observed settlement data are analyzed and evaluated. These data are used for the benefit of the construction.   Related Articles | Metrics

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Comparison of Soil Dielectric Constant-Water Content Models LIU Hua gui， ZENG Jian null    2011, 25 (2): 58-.   Abstract （3685）            Knowledge map    The Time Domain Reflectometry(TDR) used to estimate soil water content was based on the relationship of soil dielectric constant\|water content. Errors of Topp model, Mixing model and Diffusion model were analyzed with test results. Test results show that parameters of Mixing model and Diffusion model are too randomly to be determined, but parameters of Topp model with neglecting the forms of soil component can be used in engineering with proper revising in despite of the error in the model. Related Articles | Metrics

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Identification and Application of Seismic Wave Advanced Detection to Strata Breaking Zone LU Wei1,2, ZHAO Ru xiang3, WEI Wei4, ZHONG Zong qing2 null    2011, 25 (3): 71-.   Abstract （2404）            Knowledge map    Based on the application of advanced geology forecast system TSP203 in the geological detection of Zhengjiaya tunnel of Yichang\|Badong Expressway, the judging criteria of detection of strata breaking zone by TSP, the detected results coincided with the results of excavation, which was the guideline for tunnel construction and as the reference for similar engineering. Related Articles | Metrics

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Dynamic research of subgrade soil of group A, B crushed stone filler in high speed railway GUO Jianhu null    2012, 26 (5): 116-120.   Abstract （2142）            Knowledge map    The dynamic triaxial test model was established aiming on the longterm dynamic deformation stability problems of the high speed railway subgrade that made of group A, B crushed stone fillers based on the shorttime indoor dynamic triaxial test and the working conditions of the high speed railway subgrade. The dynamic modulus and damping ratio test was conducted for the bed bottom and subgrade body of the group A, B crushed stone fillers. Then, we concluded that the compaction degree, confined pressure are the main influential factors of dynamic modulus and damping ratio. Finally, we established the correlation model of dynamic modulus, damping ratio and dynamic shear strain by considering the influence of compaction degree and the confined pressure. It is confirmed that the dynamic stressstrain relationships can be described using the modified HardinDrnevich model. This is of great significance for the indepth study of longterm dynamic deformation stability of high speed railway. 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 null    2013, 27 (3): 76-79.   Abstract （1900）            Knowledge map    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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An Evaluation Method in Micro-Zoning for Karst Development Degree WANG Yu, FAN Lian, MEI Tao, WANG Xing yun null    2011, 25 (4): 56-58.   Abstract （3479）            Knowledge map    As a special engineering geology phenomenon, the development degree evaluation of karst is one key of engineering design. Based on karst foundation engineering of Ye Gang 220 kV substation in Huangshi, the engineering site is divided into some small zones, and the surface density contour of karst cavity, three dimensional contour of bedrock surface, and drilling hole event rate contour are drawn by using software sufer. Based on the graphics and practical data the micro\|zoning of different karst development degree is evaluated, which provides reference for engineering optimization design. Related Articles | Metrics

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Sample Preparations for Strong Slaking Soft Rocks LV Longlong1,2, SONG Li1,2, ZHANG Tianyu2 null    2016, 30 (5): 601-603.   Abstract （1240）            Knowledge map    The redbed soft rock samples from the Humaling Tunnel of LanYu Railway Project is Dingxi City, Gansu Province have strong slaking properties and they are disintegrated quickly during the sample preparation process. A new sample preparation tool consisting of nylon sample holding tube and sample grinding clamp was developed to isolate the sample from the water in sample preparation process. This device can improve the quality of the test sample. Related Articles | Metrics

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Study of Optimized Mixing Ratio of High Pressure Prefabricated Cement-Soil Columns GUO Yukui1， CHEN Dafen2， DAI Ye3， FENG Lei2 null    2018, 32 (1): 106-110.   Abstract （1114）            Knowledge map    The development of a new prefabricated high pressure formed cement mixing soil column equipment is introduced in this paper. Under a pressure of 25 MPa, the relationship between the cement ratios and the compressive strength of prefabricated cementsoil columns are investigated. The cementsoil block samples with different mixing ratios and the unconfined compressive strength correlations are obtained throughout the regression analysis. The amount of cement, lime and water in the prefabricated high pressure formed cementsoil columns are optimized and the appropriate cementwater ratio range is between 0.4 and 0.7. Related Articles | Metrics

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Lining Thickness on the Supporting Stability of Multi arch Tunnels WANG Fei, LI Haoyu, SHEN Hongbo null    2012, 26 (1): 45-48.   Abstract （2557）            Knowledge map    The stress distributions in the multiarch tunnels with various lining thickness were analyzed through the finite element method. The factor of safety of the lining structure correspondent to the lining thickness is obtained from the analyses so that the appropriate lining thickness can be selected. These results can be used in the design the similar lining structures for the multiarch tunnels. Related Articles | Metrics

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Insitu Permeability Tests in Guizhou Basalt Residual Soils TIAN Xiaobo1, LIU Xin2 null    2012, 26 (4): 123-125.   Abstract （2309）            Knowledge map    Insitu permeability tests in the basalt residual soils were required in the Biwei Expressway in Guizhou. The doublering permeability method was selected for the basalt saprolite soils with different degrees of weathering. The test results demonstrate that the coefficient of permeability of the reddish brown residual soil is greater than that of yellowish brown soil. The colluvial soils with large degrees of weathering at both sides of the natural slope are slightly more permeable than soils with less degrees of weathering in the middle. The permeability decreases with the increase of the unit weight of the residual soils. Related Articles | Metrics

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Ultimate Settlement Analyses of the Testing Area for a Soil Improvement Project WANG Kun，XIE Wandong, LIN Yougao null    2013, 27 (4): 23-26.   Abstract （1909）            Knowledge map    Three settlement analysis methods: ThreePoint, Asaoka, and Hyperbolic, are used to predict the ultimate settlement of the testing area of a soil improvement project. The measured settlement values are compared with the predicted values. The empirical settlement coefficient of the test area is then obtained through the comparison and this settlement coefficient can be used for predicting the settlement magnitudes of the project. Related Articles | Metrics

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Comparative FEM Studies on Embankment Settlement Using Elastic and Elasto-Plastic Theories LIU Xinghua1,2, YE Chong3, LI Xuchong1,2 null    2014, 28 (4): 78-81.   Abstract （1653）            Knowledge map    The instant settlement, pore pressure as well as the consolidation settlement of an assumed embankment over cohesive soils is numerically analyzed by using finite element method (FEM) with both elastic and elastoplastic theories. The results indicate that, the zone of loading influence using elastic theory is significantly greater than the results using elastoplastic theory. The elastoplastic analysis should be used in embankments over the normally to slightly over consolidated soils. For embankment or atgrade roadway on heavily overconsolidated soils, elastic theory might be used. It is also concluded that the boundary conditions have strong influence on the analytical results. Related Articles | Metrics

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Blasting Effects of Mining Operation on the Final Open-Pit Slope in Zijinshan Gold-Copper Mine LAI Hongyuan null    2014, 28 (6): 103-107.   Abstract （1443）            Knowledge map    In order to analyze the blasting effects during the mining operation and the dynamic response of the slope excavation by blasting, the vibrations on the open pit slopes induced by the blasting are monitored and the collected data are analyzed by the regression method. The results indicate, at locations close to the slope, the controlled blasting is necessary. The total blasting charge as well as the initiation sequence should be carefully designed. The presplit blasting is necessary at locations near the end and at the bench of the slope in order to maintain the integrity of the bench and minimize the direct blasting impact on the bench. Related Articles | Metrics

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Stability Analysis and Mitigation of a High Cut Slope in Wushan County,Three Gorges Reservoir Area GUAN Hongfei, XIAO Shirong, SONG Guilin, MING Chengtao null    2014, 28 (2): 64-67.   Abstract （1916）            Knowledge map    There are many high cut and fill slopes created in the Phase IV Immigration Project for the Three Gorges Reservoir affected areas in Wushan County. The instability or excessive deformation of these slopes might post a potential hazard to the safety of infrastructures, buildings and human life. This paper presents a case study of the stability evaluation of a high cut slope for the site of Western China Teachers Residential Community in Wushan County. Factors that affecting the stability of this slope are discussed in the paper. The limit equilibrium and geological analogy methods are used in the stability evaluation and prediction work. The stability mitigation scheme is a combination of masonry gravity retaining wall, flattening slope, reinforced concrete grid beams and installation of drainage system. Related Articles | Metrics

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Engineering Geology Characteristics of Jintan Salt Mine HUANG Mengyun1, LIU Wei2, SHI Xilin2 null    2014, 28 (6): 92-95.   Abstract （1973）            Knowledge map    Energy storage caverns constructed in salt formations is one of the most widely adopted patterns in the world. To explore the feasibility of storage clusters in the Jintan deep salt mine, the geophysical explorations and research works have been performed on the regional geological and tectonic characteristics as well as the geological occurrence of the salt mine. The following conclusions have been obtained: 1) the sedimentary boundaries of Jintan salt basin are controlled by several faults. These faults, which are currently inactive, belong to the compressional faults, and have fairly gas tight character. 2) The salt mines mainly deposit in the fourth section of FuNing Group, Eocene Series. The salt layer and other layers are horizontally alternatively deposited. The salt layers are gradually wedging out in all directions. In the center area of salt basin, the thickness of salt is in range of 68231m with a good engineering property. The salt rock in this area has a great potential for the energy storage. (3) Both the overlying and the underling rock consist of mudstone, glauberite and other very low permeability rock formations. They have excellent gas tight property for the proposed storageclusters. In conclusion, the regional stability and tightness of Jintan salt basin are satisfactory and can be selected as the candidate site for energy storage clusters. Related Articles | Metrics

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Correlations between the SPT N Values and the Shear Wave Velocity of Soils in Shandong Yellow River Alluvial Plains CHEN Weibing1, LV Yinghui2, JIANG Hao1 null    2015, 29 (1): 88-89.   Abstract （1745）            Knowledge map    The shear wave velocity of the subsurface soils is one of the important parameters for the site seismic evaluations. This parameter can also be used in the site seismic and well as building classifications. This paper summarizes the standard penetration testing (SPT) N values as well as the shear wave velocity values in several coal burning power stations in Shandong Yellow River Alluvial soils. The regression analyses are performed on the two groups of data. An empirical relationship between the SPT N values and the shear wave velocity is developed for the preliminary design purposes. Related Articles | Metrics

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RPC Railway Bridge Pier Design Analysis YANG Bo, CHEN Yan ru, ZHANG Peng null    2011, 25 (2): 55-.   Abstract （2499）            Knowledge map    Active fly ash concrete(RPC), is a new kind of activity in the future, high\|performance materials bridge engineering, there will be good economic and use value. This study uses “Midas” software modeling analysis in Xiping railway bridge in the omo valley poses the design and application of coal ash concrete compared the RPC concrete hollow thin\|wall piers and traditional pier stiffness, strength, especially in the construction, a systematic analysis of structural mechanics data pier. Discusses the RPC concrete hollow thin-wall piers in railway bridge in the application of the stiffness, puts forward the reasonable design scheme and technical measures.   Related Articles | Metrics