In this paper, a dynamic threedimensional
finite element analysis model for the stability of the reaction wall during
pipe jacking is established, so as to analyze the influence of the jacking
reaction load on the displacement, stress and pore water pressure of the soil
behind the wall and that of soil elastic modulus, solid thickness and solid
depth on the horizontal displacement of soil behind the wall. The results show
that: (1) The reaction load only affects the corresponding part of the soil
area, and the horizontal displacement of the soil around the reaction load area
varies greatly. (2) Except for a large subsidence of ground right above
reaction wall, the other areas show uplifts with parallel wave shape. (3) The
reaction load only changes the type of earth pressure behind the wall, and does
not change the distribution of earth pressure. (4) The jacking reaction load
affects the soil pore pressure little. (5) The depth of the combined force
point of the reverse jacking force and the elastic modulus of the soil have a
greater effect on the lateral displacement of the soil. (6) The solid depth and
thickness affect the lateral displacement of soil little.
HUANG Zhangjun
,
YANG Yanling
,
TANG Dongsang
,
ZHANG Weizhong
. Numerical Simulation and Monitoring of Reaction Wall
of Launching Shaft for Large Rectangular Pipe Jacking[J]. Tunnel Construction, 2020
, 40(7)
: 972
-980
.
DOI: 10.3973/j.issn.2096-4498.2020.07.005
