2003 Vol. 17, No. 6

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Object-oriented Genetic Algorithm and Its Application in the Optimization of the Anti-slide Pile
ZHOU Hai-qing
2003, 17(6): 311-314,367.
[Abstract](51) [PDF 214KB](15)
Abstract:
A new type of object-oriented class of genetic algorithm is defined. And based on this, an anti-slide pile optimization program is developed. This program is applied in a land-slide control engineering, the results indicate that it's effective to optimize the anti-slide pile design with genetic algorithm.
Study on the Method of Checking Computation for Retaining Wall's Ground Bearing Capacity and the Anti-overturning Stability
HUANG Tai-hua, RAO Ying-ming, TAN Ping
2003, 17(6): 315-318.
[Abstract](41) [PDF 170KB](22)
Abstract:
Through analyzing the factors influencing the retaining wall's anti-overturning stability, putting forward a new method with introducing the partial factor of retaining wall's active earth pressure to deal with the checking computation for retaining wall's anti-overturning stability. In this method, the checking computation for ground bearing capacity and the checking computation for anti-overturing stability have been united. The concept is clear and the consequence is reliable, moreover, it is consistent with the 《Unified standard for reliability design of building structures》(GB 50068-2001) and 《Load code for the design of building structures》(GB 50009-2001).
Reliability Analysis of Bearing Capacity of Foundation
ZHANG Gao-feng, DU Hai-jin
2003, 17(6): 319-323.
[Abstract](32) [PDF 213KB](8)
Abstract:
The main factors influencing ultimate bearing capacity of foundation determined by Hansen formula are regarded as random variables.Combined with a practical project,ultimate bearing capacity of foundation is simulated and calculated by Monte Carlo method.The reliability indexes on bearing capacity of foundation under many circumstances,corresponding to the safety level of the current deterministic design method,are calculated by JC method.Analysis of sensitivity of the main factors influencing reliability index is also carried out.
Rheological Properties of Rockmass Discontinuities and Trial Research of Its Long-term Strength
HOU Hong-jiang, SHEN Ming-rong
2003, 17(6): 324-326,353.
[Abstract](38) [PDF 297KB](12)
Abstract:
The rheological properties of rock mass discontinuities are researched by laboratory creep test. By analyzing the obtained rheological curve, a function relation formula between the strain and time is established. Study shows that the strain is not only related to time but also to the stress loaded. Finally the long term strength is determined.
Study on the Factors Influencing Lateral Deformation of Vacuum Preloading
ZHU Ji-wei, YAN Shu-wang, SUN Wan-he
2003, 17(6): 327-332.
[Abstract](48) [PDF 410KB](5)
Abstract:
Based on a large number of data determined from the practical projects treated by vacuum preloading and the result of finite element analysis on the basis of Biot's consolidation theory,the factors including coefficient of consolidation, depth of the plastic drain, distance between the plastic drain, degree of vacuum and the preloading area, are studied which determine the lateral deformation of the foundation treated by vacuum preloading.The hypothesis of single well in Barron's theory of axially symmetric consolidation is also proved to be reasonable.
Appticalion of GM(1,1) Model in the Settlement Prediction for High Fills
LIU Chun, BAI Shi-wei
2003, 17(6): 333-336.
[Abstract](39) [PDF 304KB](87)
Abstract:
The GM(1,1) model in Gray Theory is used to predict the settlement value of high fills. The result of prediction is similar to the actual settlement value. The research shows that the GM(1,1) model can be used in prediction of settlement of high fills. The new data should be added to calculation for getting more accurate result.
Study on the Hysteresis Loop of the Saturated Sand in Dynamic Triaxial Test
ZHOU Hai-lin, WANG Xing-hua
2003, 17(6): 337-342.
[Abstract](33) [PDF 256KB](4)
Abstract:
The development of strain of saturated sand is studied based on the dynamic triaxial test. Hmsteresis Loop of the Saturated Sand in the dynamic triaxial Test is studied form view of the theory analytics and stress state. The result of research shows that attenuation of stiffness and appearance of shear dilatation affect the shape of hysteresis loop greatly, these explain the phenomenon in the dynamic triaxial Test, then the mechanism of the saturated sand liquefaction is more clear than before.
Study on Prevention and Formation of Karstic Earth Cave of Fort Hill in Dalian Development Area
CAI Qiu-jing, LIN Shi-wen
2003, 17(6): 343-345,348.
[Abstract](27) [PDF 363KB](3)
Abstract:
The seasonal precipitation gathers in the recharge areas, goes along permeable passage and gradually forms the karstic earth cave of a certain scope. It has condition each other with the special landform unit,statigraphic struction, recharge and drainage. Its pan erosion effect has a potential unsafety influence on nearby surface structures.
Lab Study on Early Strength of Cement-Stabilized Soil
YE Guan-bao, CHEN Wang-chun, YANG Xiao-ming
2003, 17(6): 346-348.
[Abstract](31) [PDF 135KB](7)
Abstract:
The early strength of cement stabilized soil with high efficiency slushing agent SN-Ⅱ,early strength agent Al(OH) 3 and without additive are respectively studied by unconfined compression test at age of 3d,7d,10d.The increasing law of early strength and effect of additive are analyzed.
Study on Raft and Superstructure Column Internal Force of Tall Building with Podium and Soil Due to Interaction
PAN An-ping, LIU Yi-chuan, TANG Han
2003, 17(6): 349-353.
[Abstract](38) [PDF 211KB](6)
Abstract:
Through finite element analisys method, the model of internal force distribution of raft foundation and superstructure column is set up. It is obtained that the moment of raft and superstructure column is mainly dependent on the global raft bending.
The Study on Coefficient of Earth Pressure at Rest
JIANG An-long, GUO Yun-ying, GAO Da-zhao
2003, 17(6): 354-359.
[Abstract](49) [PDF 238KB](14)
Abstract:
Coefficient of earth pressure at rest is an important computation parameter in geotechnical engineering. The relation of K0 and soil physics mechanics parameters is studied, and the methods of determining value of K0 and some factors affecting precisely determine value of K0 are analyzed, finally some suggestions are given to determine K0.
Developments in Constitutive Model of Reinforced Soil
CHEN Qun, ZHU Fen-qing, HE Chang-rong
2003, 17(6): 360-363.
[Abstract](25) [PDF 172KB](4)
Abstract:
The analysis methods of reinforced soil and the developments of constitutive model that is necessary to study reinforced soil using composite model are summarized. The applicability and localization of all kinds of constitutive models are comprehensively analyzed and the focus for future research of reinforced soil is pointed.
Some Remarks on Analytic Theories and Applications about Piles-sinking
WANG Sheng-hui, YUAN Yong
2003, 17(6): 364-367.
[Abstract](33) [PDF 170KB](6)
Abstract:
Analytic ways are still very important for its academic maturity and convenience whereas the rapid development of computer technique. Based on the reference of literatures on analytic theories and applications about piles sinking,the reasons for the diversity between the anticipated displacement of soil when sinking piles using the analytic theories and the measured results are discussed and some remarks are presented for resolving problems of piles-sinking effectively and reasonably.
Study on the Ratio of Pile's Stress and Soil's Stress in Composite Foundation of CFG Piles Utilizing Slip Line Field Theory
WANG Rui-yong, LI Jian-guang
2003, 17(6): 368-371.
[Abstract](31) [PDF 170KB](6)
Abstract:
Generation and development processes of upper stab wound amount are reasonably analyzed utilizing slip line field theory. Mechanical condition of upper stab wound amount is derived and a new method of computing the ratio of pile's Stress and soil's Stress is supplied.

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