1999 Vol. 13, No. 3

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Displacement and Internal force Calculation as well as behavior analysis of Cement soil Composite Retaining Structure
1999, 13(3): 3-6.
[Abstract](37) [PDF 300KB](5)
Abstract:
The displacement of a new retaining structure composed by deep mixing cement column and reinforced concrete cast in situ pile is decomposed into rigid displacement and flexible deformation. The methods of analysis on the displacement and the internal force are posed. Based on a practical engineering the behaviour of this new retaining structure is discussed.
Monitoring of Tieback Prestress at Dongfang Square, Beijing
1999, 13(3): 7-9.
[Abstract](35) [PDF 250KB](6)
Abstract:
The monitoring of tieback prestress and its existing problems are discussed for foundation pit protection at Dongfang Square, Beijing, and the problems in the tensile, such as the loss of prestress, bias in loading, are explained.
Construction And Monitoring of Pit Protection for Multiple subject Building at Centre Nationality University
1999, 13(3): 10-13.
[Abstract](30) [PDF 171KB](7)
Abstract:
This paper introduces measurement of stress of anchor, slope displacement and ground settlement,analyses and discusses the problems of stress state of anchor, and the slope displacement,ground settlement based on engineering cases.And obtained corresponding conclusions.
Technique of Deep Excavation Protection Combined Soil Nailing and Anchor Pile in Gravel Stratum
1999, 13(3): 14-15,40.
[Abstract](41) [PDF 272KB](6)
Abstract:
The traditional method of anchor pile on the deep foundation pit bracing in the gravel stratum with high hardness, poor drilling and easy slump is complicated owing to difficult construction, low efficiency and high cost In gravel stratum,the method combined soil nails and anchor pile is adopted in deep foundation pit bracing, it can obviously cut down engineering cost, raise efficiency and shorten construction period.
Analysis on Load Transfer Mechanism of Pile
1999, 13(3): 16-20.
[Abstract](42) [PDF 208KB](7)
Abstract:
The load transfer function method (LTFM) is a significant means of load transfer mechanism analysis of pile. The paper divides the soil body around pile into two parts, the elastic area and plastic area for the common action of pile soil. According to the law of linear increase of shear sthrength with the depth of natural ground, it gives the solution by the basic differential equation of load transfer function. And the practicability of the method is illustrated by the living example.
Calculating Methods of Laterally Loaded Pile Groups
1999, 13(3): 21-23.
[Abstract](37) [PDF 138KB](6)
Abstract:
Based on studying a lot of calculation methods of laterally loaded pile groups at home and abroad, in accordance with the Technical Code of Building Pile Foundation, a modified method, which can consider the group effect and load distribution ratio in the pile groups, is proposed in this paper It may be served as a reference in the design of pile foundations.
Design and Construction of Jet Grouted Load bearing Pile
1999, 13(3): 24-26.
[Abstract](37) [PDF 402KB](6)
Abstract:
As a kind of load-bearing pile, high pressure jet grouted pile has not been the ripe experiences in its design and construction, thereforce it is the less for its application in our country at present According to the theoretical analysis, and combined with engineering project, the paper discusses the characteristics of its design and construction, and points out that assuring diameter and strength of pile body is key to design and construction.
Grouting Technique after Pile Driving at Bottom Pile and Its Application
1999, 13(3): 27-29.
[Abstract](63) [PDF 129KB](9)
Abstract:
The technology of grouting after pile driving at the bottom of pile makes up for some inherent defects caused by the bore cast in place pile protecting bore wall with mud and thereby it enhances the bearing capacity of pile greatly Here the function mechanism and the technological process of grouting after pile driving technology are explained by engineering examples and the development prospect is pointed out.
Application Study of High Pressure Bored Pile
1999, 13(3): 30-33.
[Abstract](53) [PDF 340KB](6)
Abstract:
The characteristics of high pressure bored pile and its construction technical process are expounded, its engineering quality questions found by the test are analysed, combined with the engineering practice, its technical measurements of prevention and treatment are put forward.
Quality Examination of Lime soil Compaction Pile at Chengdong Bus Passenger Transport Centre, Xi'an
1999, 13(3): 34-37.
[Abstract](36) [PDF 327KB](6)
Abstract:
The successful application of lime-soil compaction pile provides an economical and reliable method for ground treatment of high storey building in loess area
Experimental Study on Properties of Cement soil
1999, 13(3): 38-40.
[Abstract](37) [PDF 124KB](8)
Abstract:
As a new type of building material, the cement soil is composed of cement, soil and water It has the characteristics of not only soil engineering, such as the optimum water content, the maximal dry unit density, but also concrete, such as hydraulicity and strength increasing with time etc. On the basis of a lot of experiments, some properties of cement soil are obtained, these will be conducive to the widespread application in geotechnical engineering.
Application of Preloading Method in Soft Soils Consolidation in A Southern Port Area
1999, 13(3): 41-44,56.
[Abstract](51) [PDF 365KB](6)
Abstract:
This paper chiefly analyzes on-spot monitoring materials got in the deep and thick soft soils consolidation by preloading in a southern port area and conducts the FEM analysis of soft soils consolidation settlement So the effect of preloading construction is ensured.
Rectifying A Deviation of Giant Round Gas Pot
1999, 13(3): 45-48.
[Abstract](32) [PDF 307KB](4)
Abstract:
The technique to rectify a deviation of buliding is one of the popular techniques for geotechnical engineering in the recent years This paper introduces a sucessful example from its principle, design, construction and monitoring.
Saturated Dead Weight and Saturated Unit Density of Loess
1999, 13(3): 49-51.
[Abstract](44) [PDF 125KB](7)
Abstract:
When determining the coefficient of collaspsibility for dead weight, the saturated density which is asked to calculate saturated dead weight of loess can be obtained from the formulae and tables,its precision can satisfy engineering demand.
Study of Microstructural Effect on Clayey Soil Solidation
1999, 13(3): 52-56.
[Abstract](34) [PDF 360KB](14)
Abstract:
In this paper, the concept model of soil microstructure is established from the viewpoint of soil microstructure system. According to the nonlinear features of soil, 7 fractal dimension parameters to identify structure state of soil are suggested with the help of fractal theory. On the basis of the above results, the changing characteristics of soft soil microstructure are studied during solidation using Xiamen soft soil as example, and a lot of important results are given. For this reason, more knowledge about mechanics features of soft soil is obtained.
Application of Pore Pressure Static Cone Penetration Test in Shanghai Area
1999, 13(3): 57-59.
[Abstract](33) [PDF 253KB](6)
Abstract:
The paper introduces its advantages of dividing silty and sandy soil intercalation and evaluating coefficient of consolidation by practice of Pu Dong international airport runway engineering, in Shanghai.
Parameter Calculation of Groundwater Dispersion Experiment In situ
1999, 13(3): 60-62.
[Abstract](28) [PDF 131KB](5)
Abstract:
A dispersion test is carried out in field in order to get the dispersion parameters of the shallow aquifer.FEM model is used to simulate the dispersion process in the test area.
A Deep Thought Accident of Water inrush form Pit
1999, 13(3): 63-65.
[Abstract](105) [PDF 278KB](5)
Abstract:
A vital enginering accident caused by water-inrush from foundation-pit occurs in a city, this paper analyses the indirect reason for the accident on the view of geotechnical investigation and give to be drawn a lesson form the accident.

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