Elastic Analysis of Single Pile-Rigid Circular Raft Systems in Layered Soils

2005 ◽  
Author(s):  
Z. Y. Ai ◽  
J. Han ◽  
Y. Yan
Keyword(s):  
Single Pile ◽  
Elastic Analysis ◽  
Layered Soils

Analysis of Single Pile Settlement in Layered Soils Based on Shear Displacement Method

2011 ◽  
Vol 368-373 ◽  
pp. 2688-2691
Author(s):  
Gui Hai Fu ◽  
Li Min Wei ◽  
Hui Zhou
Keyword(s):  
Skin Resistance ◽  
Shear Displacement ◽  
Measure Data ◽  
Single Pile ◽  
Layered Soils ◽  
Displacement Method ◽  
Shear Displacement Method ◽  
Pile Settlement ◽  
Force Displacement ◽  
Settlement Distribution

Based on the theory of shear displacement method, the transfer matrix of pile in layered soils was deduced, so the analytical theory of settlement of single pile in layered soils is established, which can take into account the nonlinear influence of soils, and with which settlement, distribution of axial force, displacement and skin resistance of single pile along the depth in layered soils can be easily attained. By contrast with the practically measure data, it can be seen that the method proposed in this paper is simply and comparatively accurate in calculating the pile settlement under working load.

Horizontal mechanical responses of single pile due to urban tunnelling in multi-layered soils

2021 ◽  
Vol 135 ◽  
pp. 104164
Author(s):  
Liqiang Cao ◽  
Dingli Zhang ◽  
Xiang Shen ◽  
Jie Su ◽  
Huangcheng Fang ◽  
...  
Keyword(s):  
Single Pile ◽  
Layered Soils ◽  
Mechanical Responses

Application of shotcrete constitutive model to the time dependent behavior of TBM tunnel lining

2018 ◽  
Vol 7 (3) ◽  
pp. 1826
Author(s):  
Heyam H. Shaalan ◽  
Mohd Ashraf Mohamad Ismail ◽  
Romziah Azit
Keyword(s):  
Constitutive Model ◽  
Steel Fibre ◽  
Tunnel Lining ◽  
Time Dependent ◽  
Elastic Behaviour ◽  
Elastic Analysis ◽  
Time Dependent Behaviour ◽  
Shotcrete Lining ◽  
Creep And Shrinkage ◽  
Dependent Behaviour

Shotcrete is ordinary concrete applied to the surface under high pressure. It demonstrates a highly time-dependent behaviour after few hours of application. Traditional approaches assume a simple linear elastic behaviour using a hypothetical young modulus to investigate the time-dependency and creep effects. In this paper, a new constitutive model of shotcrete is applied to evaluate the time-dependent behaviour of a TBM tunnel lining and investigate the parameters that can influence this behaviour. The Shotcrete model is based on the framework of Elasto-plasticity and designed to model shotcrete linings more realistically. The basic data of Pahang-Selangor Raw Water Transfer Project is used for the analysis study. An attempt is made to investigate the influence of some input parameters of the shotcrete model on the time-dependent behaviour of the shotcrete lining. These parameters include the time-dependent stiffness/strength parameters, creep and shrinkage parameters and steel fibre parameters. The variation in shotcrete strength classes causes a noticeable influence on the development of shotcrete compressive strength with time, particularly during the first days of application. The creep and shrinkage strain cause a considerable reduction in the development of the shotcrete stress with time. The impact of steel fibre content is determined, and the result indicated that the development of plain shotcrete stresses with time is lower than that of the reinforced shotcrete. In addition, a comparison study is performed to analyse the tunnel lining behaviour using both shotcrete model and an elastic analysis. Significant differences in shotcrete lining stresses are achieved when using the elastic analysis while the shotcrete model results in a reasonable result that can be used for the design requirements. 

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