Open AccessNumerical simulation of shield underneath passing a river in shallow water-rich sand layer
Author(s) -
Qiang He,
Gong Jian,
Wengxiang Ning
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/634/1/012017
Subject(s) - geotechnical engineering , shield , geology , arch , settlement (finance) , foundation (evidence) , stress field , cracking , displacement (psychology) , stress (linguistics) , engineering , structural engineering , petrology , finite element method , materials science , law , psychology , linguistics , philosophy , composite material , world wide web , computer science , payment , psychotherapist , political science
In view of the situation that the tunnel of Hangzhou Metro Line 6 underneath passed the Yongjiu River, the influences of the construction of the new double-line tunnel on the seepage field and stress field of the shallow buried water-rich sand layer were analyzed, and the ground reinforcement measures to ensure the safety of shield construction was proposed. The results show that: (1) After the tunnel is excavated, the seepage field gradually returns to the original seepage field, but there is still a slight disturbance in the seepage field within 30 m below the arch bottom; (2) The maximum displacement and maximum principal stress of the tunnel model are located at the bottom of the arch; (3) It is necessary to fully consider the conditions of the river, control the settlement and cracking of the foundation, and prevent the occurrence of gushing.