CAI X M, PAN H, LUO G Y, et al.Calculation study of soft soil settlement caused by large-diameter shield construction[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(1):185-193.

doi:10.16186/j.cnki.1673-9787.2021020045

Received:2021/02/22

Revised:2021/04/13

Published:2023/01/25

Calculation study of soft soil settlement caused by large-diameter shield construction

CAI Xiaoming1,2, PAN Hong1,2, LUO Guanyong1,2, CAO Hong1,2

1.School of Civil Engineering and Transportation，South China University of Technology，Guangzhou  510640，Guangdong，China；2.State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou  510640，Guangdong，China

Abstract:In order to study the law of soft soil settlement caused by large-diameter shield construction，based on the initial value solution of the saturated soil in semi-infinite space under concentrated force，the additional thrust q of the shield cutter head considering the heavy influence of mud，the friction f between the shield shell and the soil due to soil slip，the buried depth，the grouting pressure p at the tail of the shield considering the effects of the hardening of the grouting layer and the circumferential dissipation，and the influence of the formation loss were analyzed.The calculation formula of the soil settlement caused by the large-diameter shield construction in the soft soil layer and was combined with the construction parameters to carry out research.The results showed that the calculated ground settlement was in good agreement with the measured data； The maximum uplift value of the shield at different depths caused by q and f was  less affected by the depth，and the maximum uplift value of the soil caused by p increased sharply with the depth；The influence range of q，f，p on the overlying soil heave was bowl-shaped，and the range of influence and the sensitivity to depth from large to small were f，q，p.The results verify that the formula in this paper was reliable for predicting the settlement of soft soil caused by large diameter shield construction.

Key words:large-diameter shield;calculation study;soft soil;soil settlement;construction parameter

 大直径盾构施工引起的软土竖向变形计算研究_蔡晓明.pdf