2003 Vol. 17, No. 3

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Testing and Optimized Design of Rock-socked Piles Embedded in the Mudstone
LI Xiang-xin, CHEN Ru-gui
2003, 17(3): 125-128,159.
[Abstract](27) [PDF 378KB](5)
Abstract:
Through dealing with the test carried out on the end of rock-socked piles embedded in the mudstone, and the piles embedded sliding micrometer pipe, by means of pile end batholite load test and static load test, analyzing the distribution of pile lateral resistance and pile end bearing under the static load,then providing the simplified formula to get the limit friction of the pile lateral resistance. Base on the result, it carries out optimum design of rock-socked piles.
Composition,Structure and Stabilization of Soil
HE Xing-yang, CHEN Yi-min, ZHANG Wen-sheng
2003, 17(3): 129-133.
[Abstract](39) [PDF 209KB](4)
Abstract:
On the base of having given a deep analysis on composition and structure of soil,drawing a conclusion that the principle of soil stabilization is enhancing the strength of joints among soil particles and improving the contact of soil particles, proposing that the key technology of increasing the soil strength is chemical reaction occurring between bonding materials and soil particles.And summarizing some important technical methods of soil consolidation.Moreover analyzing the method of soil consolidation agent which is often used at present in soil stabilization and probing into some kinds of soil consolidation agents.At last,analyzing some important factors that influence the stabilizing soil durability such as shrinkage,water resistance,freeze-thaw durability.
A Simple Calculation for Composite Pile Fourdations Nonlinear Settlemert
HE Li-ming
2003, 17(3): 134-137.
[Abstract](41) [PDF 305KB](6)
Abstract:
Through using the load-transfer hyperbolic function, deducing a simple method to calculate the nonlinear settlement of composite pile foundation. Its feasibility is proved by comparing the p-s curve of testing to that of calculating.
Deformation Prediction for Deep Foundation Soil Considering Couple Effect
LI Xiao-yan
2003, 17(3): 138-141.
[Abstract](37) [PDF 312KB](3)
Abstract:
Based on Biot's consolidation theory, considering couple effect of seepage and stress of deep foundation soil during the process of water discharging, the efficient deformation prediction method for deep foundation engineering is introduced. The method is used in practical deep foundation engineering. couple, deep foundation pit; soil deformation, deformation prediction
Nonlinear Theories Research of Stability of Surrounding Rock
XU Chuan-hua, REN Qing-wen
2003, 17(3): 142-146.
[Abstract](42) [PDF 217KB](4)
Abstract:
Surrounding rock of underground engineering has high nonlinear characteristics, so its mechanical qualities can be studied and predicted by nonlinear theories. Research of stability of surrounding rock with dissipative structure and catastrophy theory helps to unveil procedures and causes of rock failure and develop a method of solving stability of surrounding rock.
Study on Frame-Spring-Peripheral Foundation System Model for the Numerical Cross-section Analysis of Segments in Shield Tunnel
HU Zhi-ping, LUO Li-juan
2003, 17(3): 147-150.
[Abstract](31) [PDF 179KB](3)
Abstract:
The lining structure of shield tunnel is composed of several segments and joints.In the analysis of the cross-section subjected to a definite external loading,beam-spring model is usually employed. The frame-spring-peripheral foundation system model is proposed to analyze the respond of external loading.This model has some advantages,like continuous ground reaction and impairment of joint stiffness.Furthermore,based on the example of the shield tunnel through Yangzi River,some valuable results are presented.
Numerical Simulation of Dynamic Excavation Construction Process of Tongyu Tunnel Entrance
ZHANG Peng-yong, XU Lin-sheng, YANG Jun
2003, 17(3): 151-154.
[Abstract](26) [PDF 351KB](3)
Abstract:
According to the character of step branch excavating in the Tongyu tunnel entrance construction,the dynamic excavation simulatation of construction process has been conducted with FEM methods,feedback controlling design is realized and the construction is controlled.
Equivalent Transformation of Mohr-Coulomb Criterion and Its Application in Slope Stability Analysis
SHI Wei-min, ZHENG Ying-ren
2003, 17(3): 155-159.
[Abstract](30) [PDF 208KB](5)
Abstract:
Deducing a general expressions by comparing and analyzing the Mohr-Coulomb yield criterion and von Mises yield criterion. Based on the condition that the area of equivalent circle equal to the area of Mohr-Coulomb yield criterion, then Lode angle of the equivalent circle is obtained, so the Mohr-Coulomb yield criterion and von Mises yield criterion achieve to unify, which makes easy program. The functional expressions relative to the equivalent area circle and every D-P criterion provide a transformation between each other, which make calculation simpler. The results show the method mentioned above is feasible.
Discussion on Soil Reaction Spread of Whole Foundation for Tall Building with Podium
PAN An-ping
2003, 17(3): 160-162,174.
[Abstract](33) [PDF 182KB](5)
Abstract:
Through finite element analisys method, the model of soil reaction spread is set up. It is obtained that the soil reaction spread principally is dependent on raft thick, elastic modulus of soil and loads of tall building. In fact the reaction spread is reduced from concret wall of tall building to frame of podium,and the spread range about is 2~4 spans of podium.
Discussion on the Calculation of Bearing Capacity for the Double-direction Eccentricity Rectanglar Extended Foundations
HUANG Tai-hua, ZHOU Jing, HUANG Shao-hong
2003, 17(3): 163-166.
[Abstract](25) [PDF 296KB](5)
Abstract:
Based on the current calculational method of the single-direction eccentricity magnified coefficent,deducing another coefficent metheod of the calculation of bearing capacity for the double-direction eccentricity rectanglar extended foundations by an eccentricity K(e) corresponding directly to a dimension of extended foundations.Its feasibility is proved by practice. coefficient methed;double-direction eccentricity;extended foundation;bearing capacity of foundation
Over-deformation Method and Its Application in Deep Excavation
HU Qiang, LIU Ning, LI Jin-hui
2003, 17(3): 167-170.
[Abstract](38) [PDF 338KB](5)
Abstract:
Based on over-deformation rule, a new method to determine the stabilization of pit, over-deformation method, is established. It becomes facility to calculate the critical guideline of the deformation of the pit. Regarding it as the precaution guideline, we can directly evaluate the stabilization of the pit. Finally, it is applied in the evaluation of the RunYang Bridge deep pit's stabilization and it is proved more efficient than other method.
Applacation of Prefabrication Drains in the Soft Soil Foudation in the Northeast
YANG Wen-fu, NAI Lei, LI Yong
2003, 17(3): 171-174.
[Abstract](46) [PDF 192KB](4)
Abstract:
Prefabricated drains is successful applied as a drainage system in the soft soil foundation improvement in the northeast firstly. Through this project, the relationship between the consolidation of prefabrication drains and the thickness of clay is concluded:in some region, the more thickness of clay, the more effect we can found, on the contrary, the effect is not obvious in the thin clay. It can be refered for the similar engineering in northeast.
An Engineering case of Large Diameter Bored Pile by Churning Drive
ZHANG Jian-ying, XING Xin-kui, YAO Ke-jian
2003, 17(3): 175-179.
[Abstract](23) [PDF 410KB](5)
Abstract:
By an engineering case of large diameter bored pile by churning drive in Xi' an area of China, the process of design and application of pile foundation is brief introduced.The experiences about application of pile foundation are summarized and disclosed in order to put the churning drive technique into use widely in loess area.The current exsiting problems are pointed out combining with practice.
Risk Analysis of the Middle Side South-North Water Transfer Project
JIA Chao, LIU Ning, CHEN Jin
2003, 17(3): 180-183.
[Abstract](50) [PDF 168KB](6)
Abstract:
The South-North Water Transfer Project (SNWTP) is a world-attracted giant trans-basin water transrer project.Studying it's risk is very necessary.There are lots of risk factors in it, such as engineering geology risks,engineering structural reliability risks,hydrology risks etc.These risks are summarized and the proper disposal measures are proposed. The risk analysis foreground view is given.
The Ground Treatment Method for the Common Foundation Soil in Xianyang Area of Shanxi
LUO Zhang-sheng, LIU Jun-feng
2003, 17(3): 184-187.
[Abstract](23) [PDF 166KB](5)
Abstract:
Discussing and summarizing the methods of ground treatment for the collapsible loess,saturated loess,saturated sand soil and miscellaneous in Xianyang area.

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