Deflection behavior of the steel pipe-jacking in soft soil seabed

2014 ◽  
pp. 105-110
Author(s):  
L Zhen ◽  
J Chen ◽  
J Wang ◽  
G Cheng ◽  
Q Li
Keyword(s):  
Soft Soil ◽  
Steel Pipe ◽  
Pipe Jacking

scholarly journals Sensitivity analysis of ground settlement induced by pipe-jacking construction in soft soil stratum

2019 ◽  
Vol 136 ◽  
pp. 04028
Author(s):  
Xianmin Han ◽  
Wenjiang Li ◽  
Tao Chen ◽  
Wang Liu
Keyword(s):  
Elastic Modulus ◽  
Release Rate ◽  
Soft Soil ◽  
In Situ Stress ◽  
Surface Subsidence ◽  
Chamber Pressure ◽  
Ground Settlement ◽  
Stress Release ◽  
Pipe Jacking

Taking the ground settlement while pipe-jacking construction in soft soil as the engineering background, the effect of pipe jacking were studied by numerical simulation. It focused on the factors that mainly influenced surface settlement of ground including in-situ stress release rate (or ground loss ratio), chamber pressure, elastic modulus of soil, buried depth and diameter of pipe. That would provide theoretical basis for taking measures to reduce surface subsidence while jacking. The main conclusions were as follows: (1) The in-situ stress release rate and pipe diameter were proportional to the surface subsidence. (2) Chamber pressure, elastic modulus and buried depth were inverse proportional to the surface subsidence. (3) From the point of view of the influence on surface settlement, the sensitivity of pipe diameter and elastic modulus of soil was the greatest, followed by burial depth and chamber pressure, and the stress release rate was the smallest.

Study on Steel Pipe Mechanism during Culvert Box Extruding into Soft Soil

2006 ◽  
Author(s):  
H. H. Zhu ◽  
X. Y. Li ◽  
J. K. Ge ◽  
S. G. Xiao ◽  
Z. G. Yan
Keyword(s):  
Soft Soil ◽  
Steel Pipe

scholarly journals The Numerical Analysis of Tunnel Traversing Piles and Its Seismic Response in Deep Soft Soil

2022 ◽  
Vol 2148 (1) ◽  
pp. 012030
Author(s):  
Xiaomin Liu ◽  
Liwei Song ◽  
Songbao Cai ◽  
Xin Zhao ◽  
Peng Xie
Keyword(s):  
Numerical Analysis ◽  
Numerical Model ◽  
Seismic Response ◽  
Soft Soil ◽  
Large Diameter ◽  
River Estuary ◽  
Negative Influence ◽  
Diameter Pipe ◽  
Pipe Jacking ◽  
Deep Soft Soil

Abstract The Ou River estuary deposits deep soft silt and silt clay, the pipe-jacking tunnel departures from Qidu island, then passes underneath north levee road, viewing platform, Ou River and Ou River road, finally reaches the received well. The net distance between tunnel segment and the viewing platform piles is only 230mm. In order to analyze the negative influence of large diameter pipe-jacking tunnel traversing piles of viewing platform, the numerical model is established, and the levee road settlement value is found which matches with observed settlement very well. The dynamic analysis is also conducted by EI Centro seismic wave, and the result reveals that the max displacement occurs on the segment between the rear row piles of viewing platform, and the max displacement reaches 68.6mm in the earthquake.

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