2001 Vol. 15, No. 2

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Factors Influencing Deformation of Excavation Pits and Numerical Simulation with Finite Element Method
2001, 15(2): 63-68,85.
[Abstract](24) [PDF 287KB](6)
Abstract:
Factors influencing deformation of excavation pits are one of important contents of its deformation control,which are developed to simualte and analyze in detail with the system of the optimized design with deformation control and the numerical simulation with finite element method in deep excavation-pit engineering (SDCDEFEM).Measured and simulated data of maximum settlement,maximum displacement,maximum swell and their places are statistically analysed.The statistic formula estimating maximum deformations and their places of deep excavation pits are obtained.Economical and effective measures of deformation control are put forward.
Discussion on the Formula of Anti-extraction Calculation for Extended Foundation on Wind-borne Sand Deposit
2001, 15(2): 69-72,91.
[Abstract](78) [PDF 344KB](6)
Abstract:
Based on analyzing the mechanism of fraction for anti-extraction soil by using the results of in-side model test about wind-borned sand deposit foundation,three stressing process of the ultimate bearing capacity in soil is given,and the basic formual for anti-extraction capacily calculation is established.Compared with other methods at present,the accuracy of the calculation result is several times over that of others.Because the scope of application isn't limited by width-to-depth ratio,it is very convenient for widely application.
Composite Foundation Technique and It's Application
2001, 15(2): 73-79.
[Abstract](38) [PDF 264KB](7)
Abstract:
The design principle of composite foundation is given.Calculation of bearing capacity of composite foundation,calculation of deformation and soft cushion is studied.The research problems of composite foundation technique are proposed.
Application of Ram Expand Piles used in High-rise Buildings with Soft Soil Foundation
2001, 15(2): 80-85.
[Abstract](34) [PDF 430KB](7)
Abstract:
Based on a practical project of ram-expanded piles used in a high-rise building with soft soil foundation,some problems concerning design and construction of such kind of piles are analyzed and studied. A comparison with the foundation piles used in another eighteen-layer high-rise building with the same foundation,which is exploded because of it's large inclination,is given.
Design of the Composite Foundation with long-short-pile
2001, 15(2): 86-91.
[Abstract](28) [PDF 234KB](8)
Abstract:
The design idea of long-short-pile composite foundation is expounded.The calculating methods of bearing capactity and settlement are intruduced.The determination of related parameters is also analyzed.
Prefabricated Drain Technology Used in Soft Soil Foundation Improvement
2001, 15(2): 92-95,106.
[Abstract](32) [PDF 399KB](5)
Abstract:
The principle of prefabricated drain technology used in soft soil foundation improvement,calculation of strength growth due to consolidation and mechnism of settlement are discussed.The future of the prefabricated drains is also presented.
Application and Effect Assessment of Pre-loading Technique in a Certain Project
2001, 15(2): 96-98.
[Abstract](25) [PDF 139KB](6)
Abstract:
Pre loading Technique is adopted to improve the soft soil in Shenzhen bay reclamation engineering. Based on in situ measurement and test,the treatment effect is assessed in terms of settlement, degree of consolidation and soil strength.
Unevened Foundation Treatment in Mountain Area
2001, 15(2): 99-100.
[Abstract](26) [PDF 97KB](7)
Abstract:
Abstraet The alluvial soil layers in mountain area are dispersed unevenedly,so that the bearing capacity of soil is quitely varied.The method of rational exchanging soil is used to improve the bearing capacty in order to reduce engineering cost.
Research of the Combining work of Gravel Piles and Dynamic Consolidation Method Used in Improving Soft Soil Foundation
2001, 15(2): 101-106.
[Abstract](56) [PDF 423KB](7)
Abstract:
The mechanism of the combining work of gravel piles and dynamic consolidation method used in improving soft soil foundations is mainly discussed.Based on an example introducing the application of the new method,some problems exiting in the practice are debated.
Discussion on Constructional Parameter and Technological Process of Twist Drill-Concrete Pump Piling of CFG Piles
2001, 15(2): 107-111.
[Abstract](33) [PDF 380KB](7)
Abstract:
The technological process using twist drill concrete pump piling of CFG piles is analyzed and summed. Based on the mechanism of piling, theoretical formulas of constructional parameters are derived and then applied to the practice of engineering.
Slope Supportig Technology of Rigid-jointed Fram Piles
2001, 15(2): 112-118.
[Abstract](39) [PDF 469KB](6)
Abstract:
The Concept and characteristics of slope supporting piles with rigid-jointed frame are introduced,as well as its calculation method,construction and engineerigng application. The essential distinction between supporting piles with rigid-jointed frame and two-line piles is analyzed.Some reference is provided to geotechnical designers and constructors.
Application of Multi-wave Exploration Technology in Underground Covered Object Detection
2001, 15(2): 119-121.
[Abstract](43) [PDF 274KB](5)
Abstract:
Multi-wave exploration technology is widely used in engineering geological field and is accepted by most engineering personnel. In applications of an underground grain depot and civil air defense, high-density seismic image and multi-channel transient R wave exploration are adopted. Good result is obtained and a new resolution for explorating covered object detection is given.
Application of High-pressure Gunite Technique in Sealing the Waste Pipe Around
2001, 15(2): 122-125.
[Abstract](38) [PDF 322KB](4)
Abstract:
The high-pressure gunite technique is widely applied to impervious reinforcement projects of the water conservancy and civil engineering and is gained a wealth of successful experiences and outstanding economical benefits.It is incomparable with any other techniques in the uses and scope of application.These examples of impervious reinforcement projects are frequently appeared in the periodicals. But the project of sealing the waste pipe around is its successfully up-to-date applicational achievement.The successful example of the project of sealing the waste pipe around is introduced.

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