doi:10.16186/j.cnki.1673-9787.2020.1.18

Received:2019/04/06

Revised:2019/05/19

Published:2020/01/15

Influence of shield construction on adjacent high-speed railway bridgepiles in silty soil layer

XIAO Zhaoran, ZHANG Yang, JIANG Minmin, LIU Haijun

School of Civil Engineering and Architecture， Henan University of Technology， Zhengzhou 450000 ， Henan， China

Abstract:Aiming at the construction problem of high-speed railway bridge in the subway shield tunnel， the high-speed railway bridge of Zhengzhou West District subway tunnel was used as the engineering background， and the displacement of the surrounding soil layer and pier was measured in the field. The ABAQUS numerical simulation software was used to simulate the process of crossing the shield. The dynamic simulation of the construction process was carried out to study the effects of soil grouting reinforcement measures on soil displacement and displacement and internal forces of bridge piles. The results showed that the shield side-crossing high-speed railway pile would cause the maximum horizontal displacement， bending moment and side friction resistance of the pile at the buried depth of the shield tunnel. After the grouting and strengthening of the traversing area， the traversing could be greatly reduced. The maximum settlement of the bridge pier was reduced by 72. 6% ， and the maximum horizontal displacement， bending moment and side friction resistance of the pile were reduced by 58. 3% ， 37. 6% and 23. 7% respectively. The soil layer grouting reinforcement construction process had obvious protection effect on the pier， and this reinforcement scheme was feasible. The field measured data was consistent with the numerical simulation results， which proved that the impact of using ABAQUS to simulate shield construction on high-speed railway bridge piles was reliable.

Key words:silty soil layer;shield tunnel;grouting reinforcement;high-speed railway bridge pile;pile deformation

粉土地层中盾构施工对临近高铁桥桩的影响_肖昭然.pdf