2007 Vol. 13, No. 3

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CENOZOIC EVOLUTION AND TECTONIC RECONSTRUCTION OF THE QAIDAM BASIN: EVIDENCE FROM SEISMIC PROFILES
YIN An, DANG Yu-qi, CHEN Xuan-hua, WANG Li-qun, JIANG Wu-ming, JIANG Rong-bao, WANG Xiao-feng, ZHOU Su-ping, LIU Ming-de, MA Li-xie
2007, 13(3): 193-211.
Abstract (629) HTML (184) PDF (938KB)(44)
Abstract:
The Qaidam basin is the largest topographic depression inside the Tibetan plateau. Understanding the tectonic origin of the Qaidam basin has important implications for unraveling the formation mechanism and growth history of the Tibetan plateau.In this paper, the authors analyze regional seismic-ref...
RHEOLOGIC IMPLICATIONS OF CONJUGATE SHEAR ANGLES
ZHANG Yi-kun
2007, 13(3): 212-219.
Abstract (303) HTML (144) PDF (353KB)(10)
Abstract:
A rheologic theory on conjugate shear angles is proposed based on the maximum lateral displacement rate (MLDR)hypothesis, which states that when compressive or tensile stress is applied to a solid, shear bands are formed in the solid in the orientations that give rise to the maximum lateral displace...
EFFECTS OF POISSON'S RATIO ON FAILURE MODE AND OVERALL DEFORMATIONAL CHARACTERISTICS OF A ROCK SPECIMEN
WANG Xue-bin
2007, 13(3): 220-226.
Abstract (436) HTML (167) PDF (413KB)(16)
Abstract:
Using FISH functions written in FLAC to calculate the overall deformational characteristics, the effects of Poisson's ratio in the elastic stage on the failure mode and overall deformational characteristics were modeled for a rock specimen with a material imperfection in plane strain compression. In...
PREDICTION OF CRUSTAL STRESS OF DEEP-BURIED TUNNELS BASED ON BP ARTIFICIAL NEURAL NETWORK
SUN Wei-feng, TAN Cheng-xuan, WANG Zhi-ming, ZHANG Chun-shan, WU Shu-ren
2007, 13(3): 227-232.
Abstract (232) HTML (231) PDF (243KB)(19)
Abstract:
The measurement of the crustal stress at depth is a difficult problem in geological engineering projects.The crustal stress is hard to determine or measuring data are not ideal because of the limitation of unduly simple research means and measuring techniques.On the other hand, satisfying results ca...
NUMERICAL SIMULATION OF THE TECTONIC STRESS FIELD AND FORECASTING OF FRACTURES BASED ON MSC MARC
LI Zhi-yong, ZENG Zuo-xun, HUANG Zheng, LIU Li-lin, WEI Zhong-yuan, ZHANG Kun
2007, 13(3): 233-238, 232.
Abstract (273) HTML (138) PDF (298KB)(10)
Abstract:
MSC MARC is a nonlinear FEA program.Its ability of highly nonlinear finite element analysis and good secondary development interface enable us to construct a complicated 3D geological numerical model and perform 3D tectonic stress modeling and nonlinear analysis, and complex constitutive equations a...
SIMULATION STUDY OF THE TECTONIC STRESS FIELD IN MINES———A CASE STUDY OF THE BAODIAN COAL MINE
WANG Ji-lin, JIANG Bo, WANG Chao-yong
2007, 13(3): 239-246.
Abstract (262) HTML (113) PDF (415KB)(10)
Abstract:
By physical experiments and numerical simulation, the ruptural deformation process and failure morphological features of rock masses were analysed.The rule in the course of rock mass failure deformation was summarized.The rock mass with homogeneous lithologic character can be treated as isotropy on ...
MECHANIC RESPONSE OF A SHALLOW-EMBEDDED AND DOUBLE-ARCH TUNNEL UNDER PARTIAL PRESSURES DURING CONSTRUCTION
XIANG An-tian, ZHU He-hua, DING Wen-qi, JIA Ming-hui
2007, 13(3): 247-254.
Abstract (213) HTML (158) PDF (395KB)(6)
Abstract:
Taking an expressway in Jiangxi province as the engineering background, the behavior of a shallow-embedded and double-arch tunnel with partial-pressure during construction is simulated.Several aspects, such as stress concentration and transfer, plastic zone distribution, vault displacement and chang...
NUMERICAL SIMULATION OF SEISMIC RESPONSE AT THE ENTRANCE OF THE UNSYMMETRICAL LOADING TUNNEL
XIONG Liang-xiao, LI Tian-bin, LIU Yong
2007, 13(3): 255-260.
Abstract (368) HTML (122) PDF (268KB)(12)
Abstract:
In the mathematic modeling of the seismic response of a tunnel, the lateral calculation range and artificial boundary have great influence on the result of calculation.With the Huangcaoping tunnel as the study objective, its seismic response is simulated using the finite difference procedure FLAC3D....
ENGINEERING PROPERTIES OF EARLY HOLOCENE SOFT CLAY ON THE EAST BANK OF ERHAI LAKE
WANG Xian-li, QU Yong-xin, JIANG Liang-wen, ZHANG Yong-shuang
2007, 13(3): 261-269.
Abstract (286) HTML (148) PDF (439KB)(9)
Abstract:
Early Holocene thick soft clay is distributed around Erhai Lake.The results of engineering property tests indicate that the soft clay on the east bank of Erhai Lake has such engineering properties as a high water content, a high porosity ratio, high compressibility, low strength and high plasticity....
RELATION BETWEEN THE GROUND STRESS STATE AND GEOLOGICAL HAZARDS IN THE UPPER REACHES OF THE YELLOW RIVER
ZHANG Chun-shan, NAN Qing-min, LIAO Chun-ting, TAN Cheng-xuan, WU Man-lu, MA Yin-sheng
2007, 13(3): 270-277, 269.
Abstract (245) HTML (135) PDF (779KB)(14)
Abstract:
On the basis of the data collected from the study region extensively, this paper simulates the ground stress state of the region and discusses the relation between the stress state and geological hazards according to the measured values of the ground stress. The conclusion is as follows : earthquake...
ASSESSMENT OF CRUSTAL STABILITY IN THE QINLING-DABA REGION
HAN Jin-liang, WU Shu-ren, TAN Cheng-xuan, LI Dong-lin, SHI Ling
2007, 13(3): 278-288.
Abstract (209) HTML (110) PDF (589KB)(5)
Abstract:
The Three Gorges reservoir water-diversion project is a new line of the south-north water diversion project.There are six major factors affecting the crustal stability in the region :crustal structure, present tectonic stress fields, tectonic framework, fault activity, earthquake activity and rock p...

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