Numerical Analysis on Large-Section Pipe Jacking within Close Distance in Soft Soil

IFCEE 2021 ◽  
2021 ◽  
Author(s):  
Xiaoli Xie ◽  
Bin Ye
Keyword(s):  
Numerical Analysis ◽  
Soft Soil ◽  
Large Section ◽  
Pipe Jacking ◽  
Close Distance

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.

Tunneling influence zones for adjacent existing pile foundation in soft soil developed by numerical analysis

2013 ◽  
pp. 633-640
Author(s):  
P Jongpradist ◽  
A Sawatparnich ◽  
S Youwai ◽  
J Sunitsakul ◽  
W Kongkitkul ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Pile Foundation ◽  
Soft Soil

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

The Numerical Analysis of CFG Pile Technology in the Disposing Soft Foundation in GuangWu Expressway

2011 ◽  
Vol 90-93 ◽  
pp. 2096-2100
Author(s):  
Yun Mei Meng ◽  
Yun Cao
Keyword(s):  
Numerical Analysis ◽  
Soft Soil ◽  
Influence Factors ◽  
Computational Results ◽  
Soft Foundation ◽  
Soil Foundation ◽  
Soft Soil Foundation ◽  
Cfg Pile

The problem of disposing the soft soil foundation will appear inevitably during the construction of modem high way. There are many ways to dispose the soft foundation. One of those is CFG pile technology. Take the CFG pile technology in the GuangWu Expressway for example, the influence factors of embankment settlement were discussed in detai by numerical analysis, some useful conclusions are obtained from the computational results.

3D Numerical Analysis of Soil Structure Interaction Behaviors of Pipe Jacking Construction

2012 ◽  
Vol 204-208 ◽  
pp. 534-538 ◽  
Author(s):  
Wen Tsung Liu ◽  
Xu Yan Lu
Keyword(s):  
Numerical Analysis ◽  
Soil Structure ◽  
Soil Improvement ◽  
Ground Movement ◽  
Science Park ◽  
Tunnel Excavation ◽  
Contraction Ratio ◽  
Pipe Jacking ◽  
Interaction Behaviors ◽  
Plaxis 3D

This study is analyzed by numerical analysis using finite element method program of Plaxis-3D Tunnel at Kaohsiung Science Park in Taiwan. It probes the risk of tunneling procedure adopting pipe jacking construction (PJC) with man–made excavation. The main parameters of numerical calculation in this research include advancement size, soil improvement ratio and void contraction ratio, etc. Those parameters are calculated to displacement and stress distribution and we get ground movement, settlement at crown and heave at invert of tunnel excavation to assess the security. This study finds that it is safe by excavation using PJC with man-made while the gap has to be less than 38mm. Actually, the gap is 100 ~ 150mm under PJC with man-made, and it will result in high risk. Therefore, the PJC with shield has more security than other methods through monitoring ground settlement.

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