doi:10.16186/j.cnki.1673-9787.2020.2.18

Received:2019/04/09

Revised:2019/05/16

Published:2020/03/15

Study on track and surface settlement caused by shield tunnel passingthrough railway box culvert

DU Mingfang1, ZHAO Wencai1,2, JIANG Minmin1

1.College of Civil Engineering and Architecture， Henan University of Technology， Zhengzhou  450001 ， Henan， China;2.Henan Jianke Foundation Engineering Co. ，Ltd. ， Zhengzhou  450001 ， Henan， China

Abstract:In order to reveal the mechanism of track settlement caused by shield tunnel passing through the railway box culvert， the numerical simulation and field test were adopted to study the box culvert project of underpass subway in Zhengzhou. The results showed that the prediction of the change trend of box culvert， track and surface settlement by Midas （ GTS ） finite element simulation was basically consistent with the field test， but the specific variation amount was significantly different. The surface settlement caused by he shield tunnel passing through the railway box culvert was about 1.3 times of that of ordinary railway， and the trackal settlement was only about 1. 1 times. The range of transverse settlement and trackal settlement caused by the construction of railway box culvert under shield tunnel was about 7 ~8 times of tunnel diameter. What's more， the volume of the track settlement groove produced by the construction of railway box culvert under shield tunnel was larger than that of the horizontal transverse settlement groove on the ground， which proved that the box culvert had the intensifying and expanding effect on the track settlement. It was suggested that the scope of track settlement monitoring should be widened and the frequency of track settlement monitoring should be strengthened. At the same time， it was necessary to strengthen the control of track settlement to ensure the safe operation of railway.

Key words:shield tunnel;numerical simulation;railway box culvert;track settlement;surface settlement

盾构隧道下穿铁路箱涵引起轨道和地表沉降研究_杜明芳.pdf