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Transactions of Tianjin University 2011年第3期17卷 175-180页

作者：孔纲强杨庆 key laboratory for {2. and Embankment engineering of Ministry of Education Geotechnical Research Institute Hohai University State key laboratory of Coastal and Offshore {2. Dalian University of Technology

The performance of inclined pile group embedded in consolidating soil under surcharge load was investigated by experiment in comparison with vertical pile group and single pile under the same conditions; dragload, downdrag, and layered soil settlement were measured. A three-dimensional numerical model was built via FLAC3D software, and verified by the experimental results. Influence factors, such as consolidation time, pile spacing, and pile tilt angle were analyzed. The results show that dragload of inclined pile group increases with the increase of consolidation time and pile spacing or the decrease of pile tilt angle. Downdrag of inclined pile group increases with the increase of consolidation time, pile spacing and pile tilt angle.

关键词： pile group negative skin friction consolidating soil downdrag dragload neutral plane

Estimating groundwater recharge following land-use change using chloride mass balance of soil profiles:a case study at Guyuan and Xifeng in the Loess Plateau of china

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Estimating groundwater recharge following land-use change us...

EVALUATION OF ROCK SLOPE STABILITY IN TERMS OF TWO INDICES,RMII AND PR

中国科学院地质与地球物理研究所第11届（2.11年度）学术年会

作者： Tianming Huang Zhonghe Pang key laboratory of engineering geomechanics, institute of {2. and geophysics, chinese academy of sciences, 19 Beituchengxilu Rd,Beijing 10002.,china

Groundwater recharge is affected by land use in (semi)arid areas.A new application of the chloride-mass-balance approach has been developed to estimate the reduction in groundwater recharge following land-use change by comparing chloride concentrations below the root zone and above the base of the chloride accumulation zone,before and after the land-use *** sites in the Loess Plateau of central china have been selected for *** from the Guyuan terrace region show that groundwater recharge beneath natural sparse small-grass was 100 mm/year,but the conversion to winter wheat about 100 years ago has reduced groundwater recharge to 55 mm/*** the Xifeng Loess Plain the conversion from winter wheat,with groundwater recharge at 33 mm/year,to apple orchard 7 years ago has led to chloride accumulation to 5 m below land surface, suggesting the recharge rate has been *** is in agreement with previous studies in these areas which have shown that the regional afforestation and other land-use conversions have resulted in deep soil desiccation and have caused an upper boundary to form with low matrix potential,thus preventing the soil moisture from actually recharging the aquifer.

关键词： Groundwater recharge/water budget Unsaturated zone Chloride mass balance Land-use change china

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Scientia Geologica Sinica 1998年第2期 38-39+41-47页

作者： Shang Yanjun and Yang Zhifa engineering geomechanics {2., institute of geology, chinese academy of sciences, Beijing 10002.

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１．ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｏｎｅｋｅｙｃｈａｉｎｆｏｒａｓｅｓｉｎｇｓｌｏｐｅｓｔａｂｉｌｉｔｙ，ｔｈｅａｎａｌｙｓｉｓｏｆｅｎｇｉｎｅｅｒｉｎｇｇｅｏｌｏｇｉｃａｌｓｉｔｕａｔｉｏｎｓｈａｓａｔｒａｃｔｅｄｍｏｒｅａｎｄｍｏｒｅａｔｅｎｔｉｏ...

关键词： ROCK SLOPE OF STABILITY EVALUATION AND

Dilatancy equation of rockfill material under the true triaxial stress condition

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Science china(Technological sciences) 2011年第S1期54卷 175-184页

作者： XIAO Yang 1,2.LIU HanLong 1,2.ZHU JunGao 1,2.& SHI WeiCheng 1,3 1 key laboratory of Ministry of Education for {2. and Embankment engineering,Hohai University,Nanjing 2.0098,china 2.Geotechnical Research institute,Hohai University,Nanjing 2.0098,china 3 School of Civil engineering and Architecture,Changzhou institute of Technology,Changzhou 2.9}02.china 1. key laboratory of Ministry of Education for {2. and Embankment engineering Hohai University Nanjing 210098 China2. Geotechnical Research Institute Hohai University Nanjing 210098 China3. School of Civil Engineering and Architecture Changzhou Institute of Technology Changzhou 213002 China

Rockfill material is widely used for construction of high rockfill dam due to its facility,economical cost,high strength and effective aseismatic *** is provoked profoundly to propose a suitable constitutive model for a better application of this *** dilatancy equation of rockfill material plays a significant role in the constitutive *** the sake of simplicity,a dilatancy equation is established by the linear least square method on the basis of the rearranged data of rockfill material in the true triaxial *** on the fact that the rearranged data at different initial confining pressures are aligned in a narrow band,the dilatancy behavior of rockfill material is independent of the initial confining ***,different from the initial confining pressure,both the intermediate principal stress ratio and the specimen density exhibit a remarkable influence on the dilatancy behaviors of rockfill ***,the predictions of the proposed dilatancy equation are in a good agreement with the rearranged test data of rockfill material at different specimen densities and stress paths.

关键词： rockfill material dilatancy equation true triaxial test density stress path initial confining pressure

Analysis on the Dynamical Process of Donghekou Rockslide-Debris Flow Triggered by 5.12.Wenchuan Earthquake

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Journal of Mountain Science 2011年第2期8卷 140-148页

作者： SUN Ping ZHANG Yongshuang SHI Jusong CHEN Liwei key laboratory of Neotectonic Movement & Geohazard Ministry of Land and Resources Beijing China institute of geomechanics Chinese Academy of Geological Sciences Beijing China china Nuclear Power engineering Corporation Ltd. Beijing China

Among the geo-hazards caused by the great Wenchuan Earthquake, the rapid and long runout rockslide-debris flow is of primary concern due to the large volume of displaced material and the resultant catastrophic impacts to the landscape and socioeconomic structure. In order to analyze the dynamical process of this kind of geo-hazard, the Donghekou rockslide-debris flow is given as an example in this paper. This event, which killed 780 people, initiated at an elevation of 13.0 m with a total long run-out distance of more than 2.00 m. The slide mass is mainly composed of dolomite limestone and siliceous limestone of Sinian system, together with carbon slate and phyllite of Cambrian. During the processes from slide initiation to the final cessation of slide movement, five dynamic stages took place, here identified as the initiation stage, the acceleration of movement stage, the air-blast effect stage, the impact and redirection stage and the long runout slidematerial accumulation stage. Field investigations indicate that due to the effects of the earthquake, the dynamics of the Donghekou rockslide-debris flow are apparently controlled by geologic and tectonic conditions, the local geomorphological aspects of the terrain, and the microstructural and macroscopic mechanical properties of rocks which compose the slide mass. These three main factors which dictate the Donghekou rockslide-debris flow dynamics are discussed in detail in this paper, and significant results of field investigations and tests of materials are presented. The above dynamical processes are analyzed in this paper, and some useful conclusions have been gained.

关键词： Dynamical process Donghekou Rockslide-debris flow Wenchuan earthquake

Palaeoenvironmental implication of the Plio-Pleistocene loess deposits in southern Tarim Basin

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chinese Science Bulletin 2002年第8期47卷 700-704页

作者： ZHENG Hongbo, CHEN Huizhong & CAO Junjilaboratory of Marine geology, Tongji University, Shanghai 2.0092.{2. institute of Earth Environment, chinese academy of sciences, Xi’an 710054,{2. institute of Environment and engineering of Cold and Arid Regio laboratory of Marine geology Tongji University Shanghai 200092 China

The sedimentary characteristics, grain-size distribution, geochemical composition and surface characteristics of quartz grains, together with palaeoenvironmental reconnaissance, all point to an aeolian origin for the intercalated siltstone beds in the Plio-Pleistocene Artux and Xiyu Formations along the southern margins of the Tarim Basin, indicating that loess deposition in the region started, at least, in the Early Pliocene. Loess deposition in the southern Tarim Basin was a response to the global deterioration, which might be attributed to the uplift of the Tibetan Plateau.

关键词： eolian loess Plio-Pleistocene Tarim Basin.

Mesozoic subduction-accretion zone in northeastern South china Sea inferred from geophysical interpretations

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Science china Earth sciences 2006年第5期49卷 471-482页

作者： ZHOU Di1, WANG Wanyin2. WANG Jialin3, PANG Xiong4, CAI Dongsheng5 & SUN Zhen1 1. key laboratory of Marginal Sea {2., South china Sea institute of Oceanology, chinese academy of sciences, Guang- zhou 510301, china 2. College of Geological and Topographical engineering, Chang’an University, Xi’an 710054, china 3. key laboratory of Marine {2., Tongji University, Shanghai 2.0092. china 4. china National Offshore Oil Co. Limited – Shenzhen Branch, Shenzhen 518067, china 5. china National Offshore Oil Co. Limited – Research Center, Beijing 10002., china 1. key laboratory of Marginal Sea {2. South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China 2. College of Geological and Topographical engineering Chang’an University Xi’an 710054 China 3. key laboratory of Marine {2. Tongji University Shanghai 200092 China 4. china National Offshore Oil Co. Limited — Shenzhen Branch Shenzhen 518067 China 5. china National Offshore Oil Co. Limited — Research Center Beijing 100027 China

A segment of Mesozoic subduction-accretion zone was inferred across thenortheastern South china Sea at approximately NE450 orientation. Basic evidence includes thefollowing: A belt of peek gross horizontal Bouguer gravity gradient (PGHGBA) is comparable in sizeand intensity to that of the Manila subduction-accretion zone. A belt of high positive magneticanomalies appears to the north and sub-parallel to the PGHGBA, representing the volcanic arcassociated to the subduction zone. The PGHGBA crosses obliquely both Cenozoic structures and presentseafloor topography, indicating a pre-Cenozoic age. The segment is offset left-laterally byNW-running strike-slip faults, in concord with the Mesozoic stress field of South china. Inaddition, the existence of the subduction zone is supported by wide-angle seismic data obtained indifferent years by different institutions. At approximate localities, a north-dipping ramp of Mohosurface is indicated by records of ocean-bottom seismometers, and a strong reflector about 8 kmbeneath the Moho reflector is indicated by both OBS and long-cable seismic records. Theidentification of a segment of Mesozoic subduction zone in NE South china Sea fills nicely the gapof the Great Late Mesozoic Circum SE Asia Subduction-acrretion Zone, which extended from Sumatra,Java, SE Kalimantan to N Palawan, and from Taiwan, Ryukyu to SW Japan.

关键词： Mesozoic, subduction zone, SE Asia, NE South china Sea, geophysics.

In situ experiments on width and evolution characteristics of excavation damaged zone in deeply buried tunnels

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Science china(Technological sciences) 2011年第S1期54卷 167-174页

作者： LI ShaoJun 1,FENG XiaTing 1,LI ZhanHai 3,CHEN BingRui 1,JIANG Quan 1,WU ShiYong 2.HU Bin 2.&XU JinSong 2.1 State key laboratory of {2. and Geotechinical engineering,institute of Rock and Soil Mechanics,chinese academy of sciences,Wuhan 430071,china 2.Ertan Hydropower Development Company,Ltd.,Chengdu 610051,china 3 School of Resources and Civil engineering,Northeastern University,Shenyang 110004,china 1. State key laboratory of {2. and Geotechinical engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China3. School of Resources and Civil Engineering Northeastern University Shenyang 110004 China2. Ertan Hydropower Development Company Ltd. Chengdu 610051 China

The seven long tunnels of Jinping II hydropower station are deeply *** width and evolution characteristics of excavation damaged zone(EDZ) are the key problem to the design of tunnels excavation and *** order to study this problem,several specific experimental tunnels with different overburden and geometric sizes were excavated at this *** borehole camera,sliding micrometer,cross-hole acoustic wave equipment and acoustic emission apparatus were *** paper introduced the comprehensive in situ experimental methods through pre-installed facilities and pre-drilled *** properties of the surrounding rock mass,including cracks,deformation,elastic wave and micro fractures,were measured during the whole process of the tunnel *** width and characteristics of formation and evolution of tunnels EDZ were analyzed under different construction methods involving of TBM and drilling and blasting,the test tunnels were excavated by full-face or two *** relationships between EDZ and tunnel geometry sizes,overburden and excavation method were described as *** results will not only contribute a great deal to the analysis of rock mass behavior in deeply buried rock mass,but also provide direct data for support design and rockburst prediction.

关键词： deeply buried tunnel excavation damaged zone evolution characteristics in situ experiments

Changes in groundwater induced by water diversion in the Lower Tarim River,Xinjiang Uygur,NW china:Evidence from environmental isotopes and water chemistry

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Changes in groundwater induced by water diversion in the Low...