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15 November 2011, Volume 25 Issue 3 Previous Issue    Next Issue

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Technology of Support and Water-Seal Design of Deep Foundation Pit in Deep Silty Fine Sand Layer ZHANG Zai xi 2011, 25 (3):  1-4.  Abstract ( 3009 )   Save Based on the engineering, the support selection, water\|seal design of deep foundation pit in deep silty fine sand layer was introduced, in which the curtain for cutting off water was improved and the isolation pile was set to make sure the support success in island of river center by pile\|anchor system. It showed the engineering was secure, the construction period was shortened and the cost was lowered. Related Articles | Metrics

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Design, Calculation and Monitoring of Deep Foundation Pit with Pile-Anchor Retaining Structure Zhang Hong bin, An Guan feng, Liu Tian jun 2011, 25 (3):  5-8.  Abstract ( 3732 )   Save The deep foundation pit was located in the CBD region in Zhujiang Newtown in Guangzhou, which had the following characteristics, the high excavation depth, the poor property of soil and the complex around environment. The general situation and design of this deep foundation pit was introduced, which included two support structures: the manual hole digging pile and prestressed anchor retaining structure and the manual hole digging pile and concrete internal bracing support structure, and the Finite element method analysis was used to calculate the effect of manual hole digging pile and prestressed anchor retaining structure. The rationality and reliability of design was verified by the comparison between FEM analysis data and monitoring data. Related Articles | Metrics

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Stability Analysis of Taipingxi Slope and Its Integrated Control in front of Dam in Three Gorges Reservoir LI Guang cheng, HOU Guo lun 2011, 25 (3):  9.  Abstract ( 3046 )   Save Taipingxi slope was the high slope in front of dam in the Three Gorges Reservoir. If it was unstable, the new built Taipingxi migrant settlement would be threantened. According to its engineering geological conditions, it was divided into several zones by geological survey and its stability was analyzed, then different treatments were proposed based on different characteristics of different divided zones. After the treatment, it was stable. The engineering was provided as reference for similar engineering. Related Articles | Metrics

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Comparison and Selection of Enclosure Structure at Jianghan Road Station of Wuhan Metro Line No.2 DONG Jun 2011, 25 (3):  13.  Abstract ( 2882 )   Save Based on the geological conditions of Jianghan Road Station of Wuhan metro line No.2, there are two possible supporting schemes for deep foundation pits, the combination of row piles with diaphragm wall and the diaphragm wall only. In order to select the best supporting scheme for the foundation pit, the two schemes are compared and analyzed by the finite element method. The conclusion shows if the combination scheme is used, the deformation of the enclosure structure is unsymmetrical seriously, and the deformation of diaphragm is large. However, if the other is used, the deformation of the enclosure structure is reasonable and meets the requirement of code standard. Therefore, the diaphragm wall is selected. This study is provided as references for similar projects. Related Articles | Metrics

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Discussion of Consolidation Drainage Measures of Soft Ground ZHAO Jian xiong 2011, 25 (3):  17.  Abstract ( 2903 )   Save Two consolidation drainage measures were discussed from the viewpoints of increasing drainage channel and discharging consolidated water as soon as possible. The one was the combination of plastic drainage plate, sand cushion and geogrid, the other was the combination of plastic drainage plate and vertical drainage pipe. Monitoring results showed that the consolidation settlement was 60~80 cm during construction. It was the new technology of the vertical drainage pipe in the consolidation drainage measures. Related Articles | Metrics

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Study on Support Design of Deep Foundation for High Building AN Guan feng, LIU Tian jun, ZHANG Hong bin 2011, 25 (3):  20.  Abstract ( 2952 )   Save Based on the deep foundation design of a high building in Guangzhou, the security hidden troubles for its support design is analyzed. Related Articles | Metrics

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Landslide Stability Evaluation in Fangxian HUANG Jia hai1, XU Guo xing2 2011, 25 (3):  24.  Abstract ( 2681 )   Save The geological environment and basic characteristics of landslide in Fangxian was invested by using field geology survey and drilling, the shear strength parameter of soil in slide zone was obtained by using laboratory test, engineering geological analogy and inversion analysis, then the stability of typical cross section of landslide was analyzed. Results showed that under the natural condition, the slope is on creeping state and its stability coefficient is lower safety coefficient, which is lack of stability state; under the heavy rain and seismic conditions, its stability coefficient is lower 1.0, which is on unstable state and should be treated. Related Articles | Metrics

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Analysis on Earth Pressure of Bridge Abutment with Reinforced Earth by Earth Pressure in Increments WANG Pei qing, HE Qiang, HUANG Yi 2011, 25 (3):  27.  Abstract ( 2416 )   Save During the embankment construction of the Dong yi\|dao's viaduct bridge of Ninghuai expressway, there was the field test to study the effect of reinforced earth in reducing the earth pressure of abutment. Test results showed that the distribution of earth pressure along the height of abutment is not smooth quadratic curve, but rather an irregular S\|shaped curve. In order to eliminate various factors effect on test accuracy in construction field and find out reasons of measurement error, it is suggest that is expressed as increase of earth pressure changes with the filling height. Related Articles | Metrics

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Time-Dependent Effect of Bearing Performance in Driven Pile LI Yong 2011, 25 (3):  30.  Abstract ( 2900 )   Save Time-dependent effect of bearing capacity of driven pile in saturated soft soil has been known in the engineering practice effectively. Combined with in situ load test results, the mechanism of time-dependent effect on bearing capacity of driven pile in saturated soft soil is analyzed． The results showed that the structure strength of the disturbed soil around the pile is regained with the time increasing and the lateral friction of pile is also increased, which shows time-dependent effect. Related Articles | Metrics

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Application of CFG Pile Composite Foundation in High Rise Building GAO Yan, YAO JI ling 2011, 25 (3):  33.  Abstract ( 2774 )   Save CFG pile is a kind of high strength pile with good adhesiveness which is the mixture of cement, gravel, stone chips or sand, fly ash with water, it is combined with soil between piles and cushion into the composite foundation, in which the bearing performance of soil between piles is fully used and the load is transferred to the deep stratum by the cooperation between piles and soil between piles. The CFG pile composite foundation has good technical performance and economic effects. Based on the engineering, its application is introduced in ground treatment. Related Articles | Metrics

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Application of Slope Bioengineering Protection Technologyin Ningde Nuclear Power Station of Fujian Province YAN Shu, LI Xiao Qiang 2011, 25 (3):  36.  Abstract ( 2697 )   Save The technology of slope bioengineering protection is more and more important and used widely. It has good effect in economy, environment and society, and it is also one of the important measures for sustainable development of construction. Based on the slope bioengineering protection engineering in Ningde nuclear power station of Fujian Province, its design and application effect are analyzed systematacially from its theory, plant selection, main types and its suitability. Related Articles | Metrics

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Application and Renovation Technology of Vacuum Preloading Combined with Surcharge Preloading ZHOU Yong hui 2011, 25 (3):  40.  Abstract ( 2134 )   Save Based on Nanhai Sanlu soft soil foundation treatment engineering, the technology of vacuum preloading combined with surcharge preloading was introduced, then its renovation and improvement were also introduced. Its results were proved. Related Articles | Metrics

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Construction of Static Pressure High Tensile Pipe Pile ZHAO Hua， FU Zai long 2011, 25 (3):  42.  Abstract ( 2299 )   Save Based on the static pressure high tensile pipe pile engineering of phase I of Times Square Project, the construction of static pressure high tensile pipe pile was introduced, which was provided as the reference for similar engineering.   Related Articles | Metrics

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Study on Settlement Calculation of CFG Pile Composite Foundation on High-Speed Railway YAO Jian wei 2011, 25 (3):  46.  Abstract ( 3024 )   Save Based on the monitoring data of 28 sections of 2 work sites on Wuhan-Guangzhou High-speed Railway, the deformation characteristic of CFG pile composite foundation under embankment load was analyzed. The settlement correction coefficient   was obtained by using the layering summation method, so it was use to calculate the settlement of CFG pile composite foundation under embankment load, which could provide a useful reference for the similar engineering. Related Articles | Metrics

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Elastic-Plastic Analysis of Surrounding Rock of Water Tunnel in Nuclear Power Plant LI Yong lin1， YAN Hong wei1， WANG Feng xian2 2011, 25 (3):  49.  Abstract ( 2273 )   Save Water tunnel is an important part of the pressurized water reactor nuclear power plant, also a key factor in affecting its safe operation. Preliminary scheme comparison of water tunnel is completed with the classical elastic\|plastic theory. Through above analysis, the calculated stress field, displacement field and plastic zone have some reference value for determination of the final scheme and post design of the supporting structure. Related Articles | Metrics

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Discussion of M-Method in Pile Foundation LIU Lan hua 2011, 25 (3):  51.  Abstract ( 2556 )   Save By using the symbolic mathematical software Maple, the precise solution of m\|method is obtained in pile foundation and compared with the results from the table look-up scheme method and finite difference method. The main parameters of m-method is discussed. Through the parameters analysis, the influence of main parameters for calculation results is discussed. Related Articles | Metrics

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Discussion of Influent Factors of Slope Stability Based on Meshless Method YANG Hong po1, YANG Shun cun2, XIE Xin yu3 2011, 25 (3):  54.  Abstract ( 2389 )   Save The density of discrete particle in computational domain, different yield conditions and flow rule were analyzed by the reproducing kernel particle method, which influences the slope stability. Their results were compared with the results both of ultimate equilibrium method and finite element method, then the reasonable value was suggested in engineering. Related Articles | Metrics

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Plan Optimization of Shallow Tunnel Based on Blasting Vibration Control in Urban HUANG Ye 2011, 25 (3):  57.  Abstract ( 2687 )   Save There are lithostratigraphic environments in the elevation range of shallow tunnel in urban. In such environment, ground surface is influenced by blasting vibration from borehole blasting method, which threatens the building on the ground. Based on JC3 segment of Jichang Road tunnel engineering in Xiamen, the propagation of vibration and its influence for ground surface were analyzed by in situ monitoring, then the blasting plan was optimized, in which the influence of vibration to ground surface was controlled. Related Articles | Metrics

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Study on Engineering Geology Characteristics of Soil and Foundation Type in Huai'an WANG Ming peng1, XUE Ning ju2 2011, 25 (3):  60.  Abstract ( 2869 )   Save On the basis of the engineering geological investigation for many years, properties, distribution and engineering geological characteristics of soil mass within 50 m depth in urban area of Huai'an were studied. It was divided into three engineering geological area according to the spatial distribution and structural characteristics of soil layers, then the physical mechanics character of soil mass that affected soil and foundation was studied. Finally, the foundation's bearing stratum choice and type were discussed. Related Articles | Metrics

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1∶200,000 Scale Active Fault Database in Shandong Province GE Fu gang, WANG Dong lei, WANG Zhi cai, SHEN De xiu 2011, 25 (3):  64.  Abstract ( 2343 )   Save  The database, as reference as from the geological map spatial database model of Digital Geological Map and Spatial Database, is built on the Mapinfo platform, which has the powerful solution for mapping geographic information. The data model is extended to include the basic feature class of the earthquake catalog, the database is provided for the basic information of earthquake preparedness and disaster reduction. Related Articles | Metrics

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Research on Qinggaoni Obtained from Mausoleum of Yue Kindom in Yinshan ZHANG Hui, WAN Li, YANG Jun yong 2011, 25 (3):  68.  Abstract ( 2933 )   Save The Qinggaoni from the mausoleum of Yue Kindom was studied to improve the engineering quality through some tests such as liquid limit test, plastic limit test, the compaction test. Tests showed that it is silt and its water content is 16.7% when it is the maximum dry density. Tests also showed that the compaction coefficient of backfilled Qinggaoni is above 0.90. which implies its compaction coefficient is satisfied with strength requirement. 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 2011, 25 (3):  71.  Abstract ( 2404 )   Save 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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Influence of Rainfall Intensity on Loose Deposits Slopes Failure by Model Tests YIN Hong jiang1, WANG Zhi bing2, HU Ming jian2 2011, 25 (3):  74.  Abstract ( 2811 )   Save There are indoor artificial rainfall experiments in self\|designed model under different rainfall intensity (26 mm/h, 51 mm/h, 68 mm/h) to study the mechanism of loose deposit slope stability in the debris region. The results showed that the soil loss under low rainfall intensities of 26mm/h is least, and the failure mode of slope is slope surface erosion; but under high rainfall intensities of 51 and 68mm/h, both failure modes of slope are slope surface erosion and gully erosion, and flowslide is the main failure mode, which are correspond to the mutation point of curve of cumulative soil loss vs time. Intermittent debris flow is formed under high rainfall intensities of 68 mm/h. Related Articles | Metrics

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Dispersity Study on Anti\|Infiltration Soil of Hydro-Junction of Kenzwat River In Manas, Xinjiang YU Wei, MA Long, WANG Qiu Li 2011, 25 (3):  77.  Abstract ( 2041 )   Save The Quaternary Pleistocene wind\|blown loess layer is widely distributed in north Tianshan mountain area of China, which belongs to the low liquid limit silt which has less cosmid and higher content of water soluble salt. According to the identification test of dispersive clay in current code, the silt is dispersive, Therefore, for the identification of dispersive soil, it is not only to macro judge from its topographic feature and lithology in the field, but also to combine with the tests in the lab such as particle analysisi test and ion content test. Related Articles | Metrics

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Construction Environmental Monitoring of Static Pressure Pile WANG Xiao jun, XU Xiang qi 2011, 25 (3):  81.  Abstract ( 2525 )   Save The surrounding environment was influenced due to the soil squeezing effect during the process of pile sinking of static pressure pile. By analyzing monitoring data, the influence region of it was obtained, which was provided as the reference for the similar engineering. Related Articles | Metrics

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Identification and Interpretation of Electrical Geophysical Prospecting for Karst Roadbed in Xiangcheng Section of Hangzhou-Changsha Passenger Dedicated Railway CHEN De ping 2011, 25 (3):  84.  Abstract ( 2581 )   Save The influence factors of karst development in Xiangcheng section of the passenger dedicated railway from Hangzhou to Changsha was analyzed systematically. By researching on the rule of electrical relative change of different lithology and combining with the cross section of electrical geophysical prospecting, the developed position and developing scale of karst in Xiangcheng section was studied. In the end, based on the engineering drilling data, the accuracy of electrical geophysical prospecting was verified. Related Articles | Metrics

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Survey and Analysis of Seepage and Bank Stability in Maojiahe Reservoir WANG Geng1, WANG Jian hua2, ZHANG Mao jun3 2011, 25 (3):  87.  Abstract ( 2664 )   Save The initial dam site for Maojiahe hydropower station was not ideal one for the high concrete dam according to its geological condition, therefore there was the additional survey for the potential dam site between Muzhu canyon and Changtan canyon, in which the rationality of potential dam site was studied and suggestions were provided. Related Articles | Metrics

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On-Site Monitoring and Analysis of Taining Deep-Buried and Long Tunnel JIANG Jing shun 2011, 25 (3):  90.  Abstract ( 2165 )   Save The stability of surrounding rock was studied during the benching tunneling construction period under the complicated geological condition through the on\|site monitoring of settlement of vault, convergence of surrounding rock, pressure of surrounding rock and internal force of steel arch based on Taining tunnel. The method, analysis and conclusion of research was as the reference in design, construction, monitoring and further theoretical research on tunnel engineering under similar condition. Related Articles | Metrics

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Dam Site Engineering Geological Evaluation in Hydropower Station WANG Jian hua1, WANG Geng2, ZHANG Mao jun3 2011, 25 (3):  94.  Abstract ( 2108 )   Save The engineering geological condition and evaluation of dam site  is the key in the survey of Maojiehe hydropower station construction, which plays an important role for its security, construction period and cost. Related Articles | Metrics