2002 Vol. 16, No. 1

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Application of Kalman Filter Method Based on AR(1) Model in Dangerous Rock Mass Deformation Analysis
2002, 16(1): 1-3.
[Abstract](28) [PDF 228KB](2)
Abstract:
Looking the model parameter of AR(1) model as the status vector,using Kalman filter method to analysis the deformation of dangerous rock mass.The result shows that the method could improve the accuracy of fitting and forecasting.
Study on the Bearing Capacity of Weak Rock in Guangzhou
2002, 16(1): 4-7.
[Abstract](29) [PDF 335KB](7)
Abstract:
Based on the many laboratory and in-situ testing data,the determination of the natural foundation's bearing capacity in weak rock and the selection of the design parameter in socketed pile are studied,some opinions and improved methods are proposed.
Application of Steel-ash Cushion for Treating Soft Clay Ground in Shallow Ground Water Zone
2002, 16(1): 8-12.
[Abstract](34) [PDF 393KB](3)
Abstract:
Researching a series of problems about using steel-ash cushion to consolidate the soft clay ground,such as properties of materials,construct process,quality control and examination.The result shows,using steel-ash cushion to consolidate the soft clay ground is a reliable and economic method.
Engineering Geologic Research of Special Rock and Soil along Nanning-Kunming Railway
2002, 16(1): 13-17.
[Abstract](39) [PDF 420KB](4)
Abstract:
The geologic setting is complex and the geologic hazard is serious along Nanning-Kunming railway. One of key problems is engineering geology in construction of the railway.Test and research of engineering geologic characteristics of swelling red soil,expansive rock and peat soil are developed.Outstanding achievements of above research provide scientific foundation for design,construction and precaution hazard of the railway.
Optimum Design of Cement Mixing Pile Length
2002, 16(1): 18-21.
[Abstract](38) [PDF 166KB](8)
Abstract:
Pile length is a key parameter in cement mixing pile composite foundation design.The pile length must be limited within the effective length of cement mixing piles.The effective length of piles not only depends on soil and pile characteristic,but also depends on grouped piles and loads distribution.The pile stiffness is reduced by the pile-pile interaction and the effective length of piles becomes longer.A new optimum design method of cement mixing pile length is to control the composite foundation settlement to get a desired numerical value.
Can Static Load Test Reflect True Conditions of Composite Foundation?
2002, 16(1): 22-24,28.
[Abstract](39) [PDF 311KB](4)
Abstract:
The reliability of the test for composite foundations deserves solid consideration,because the condition of single pile load test is far from that of the composite foundations,and the load board test of composite foundation has obvious size effect compared with buildings in true conditions.Based on the analysis of the affecting factors,put forward some useful opinion for design purposes.
Discussion on the Settlement Evaluation of Rigid-pile Composite Foundation in Tianjin Urban District
2002, 16(1): 25-28.
[Abstract](42) [PDF 302KB](5)
Abstract:
The rigid pile composite foundation is widely used in Tianjin eara, the methods for calculating its settlement include Layer wise summation method and "Qi Ming Xing" program calculation method of Tongji University.The two calculation methods are matched and analyzed each other through some engineering cases.
Analysis of Factors Affecting the Consolidation Results by Using Prefabricated Drains
2002, 16(1): 29-32,44.
[Abstract](27) [PDF 370KB](3)
Abstract:
Taking the engineering geological condition of the No.4 soft embankment test section of the Guangzhou-Zhuhai Quasi-High-speed Railway for example,Analgzing the factors affecting the consolidation results by using prefabricated drains,such as,the spacing between prefabricated drains,the depth of treatment,and the effects of well resistance and smear,etc.
Dynamic Compaction-Prefabricated Drain Soft Foundation Treating Method and Its Application
2002, 16(1): 33-35.
[Abstract](28) [PDF 268KB](5)
Abstract:
Discussing the strengthened behavior of dynamic compaction-prefabricated drain,briefly,introducing the test in-situ of a engineering in which this method is adopted.Based on the result of test,evaluating the practicability and effect of this method,scientifically and reasonably.
Mechanism Study on the Post-Grouting Technology Applied In Soft Soil
2002, 16(1): 36-39.
[Abstract](29) [PDF 324KB](3)
Abstract:
The post-grouting technology could improve the bearing capacity of bored piles and shorten their lenghth in soft soils.The reinforcing mechanism of the post-grouting technology is analysized deeply in association with the testing results of practical engineering.
A New Method to Analyse Pile-Cap Structure
2002, 16(1): 40-44.
[Abstract](41) [PDF 212KB](3)
Abstract:
Based on the finite element finite compressible stratums method, the stiff matrix of the pile-soil sustaining system is established and interaction equation is elicited. Some useful conclusions are concluded by applying program analyzing the settlement of pile bearing beam and the loads on the top of piles under the condition of pile-soil interaction,the results is approximately in accordance with those analyzed by elastic theory method.
True Triaxial Test of Medium Stress Influence on Duncan-Zhang Model
2002, 16(1): 45-47.
[Abstract](43) [PDF 132KB](3)
Abstract:
Duncan-Zhang model,which has several parameters with definite physical meaning,is widely applied in theoretical calculation,design,and actual projects.But it has limitation because of ignoring the influence of medium stress.The influence of medium stress on Duncan Zhang model is studied.
Harm of Jarosite Alteration Zone to Hydraulic Structure and Its Handle
2002, 16(1): 48-51.
[Abstract](48) [PDF 326KB](2)
Abstract:
The Jarosite alteration zone is product of the weathering pyrite.During weathering,pyrite produce a lot of sulphonic acid,the acid can not only corrode concrete,but also corrode metal structure seriously.It only takes six months to break a reinforced concrete 60 cm thick,when biuld directly the concret of power hole shaft on the pyrite ore vein.It is first case in hydraulic structure in the world.
Treatment of Rock-Foundation crack in Chongqing Region
2002, 16(1): 52-54.
[Abstract](37) [PDF 261KB](3)
Abstract:
Classfying the cracks of rock-foundation,discussing a variety of treated methods of rock crack and its theories.It is effeetive and avaluable for practical engineering.
Consolidation of Collapse-Replace Soil Foundation
2002, 16(1): 55-59.
[Abstract](30) [PDF 200KB](4)
Abstract:
Through investigating and analyzing several foundation engineering cases,researching deeply the forming mechanism of collapse in replace soil foundation,suggesting some kinds of methods to consolide the collapse-raplace soil foundation,and getting better results in many engineering practices.
Design and Construction Technology of Planting Protection for Subgrade Slope of Qinhuangdao Shenyang Special Passenger Line
2002, 16(1): 60-62.
[Abstract](39) [PDF 302KB](4)
Abstract:
It is planting protection that the first design for large-Scale subgrade slope protection of Qinhuangdao-Shenyang special passenger line,introducing the conditions and experiences of design and construction for planting protection.

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