Open AccessStudy on Surface Settlement of Water-Rich Sand Pebble Bed Shield Construction in Nanchang
Author(s) -
Binbin Xie,
Qingrui Lu,
Shijun Chen,
Li Ping,
Xiaoyi Jiang,
Jinling Liu
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 - 10.1088/1755-1315/719/3/032053
Subject(s) - settlement (finance) , geotechnical engineering , pebble , geology , shield , pore water pressure , water level , mining engineering , environmental science , geomorphology , petrology , geography , world wide web , cartography , computer science , payment
Water-rich sand layer is a kind of common bad geology that is difficult to control and has great harm. It is easy to cause serious problems such as collapse, water inrush and sand burst, and surface collapse, etc. Through the analysis of shield tunnel of water-rich sand layer in Nanchang city, a numerical model was established to study the influence of different working conditions on surface settlement. The results show that the influence of boundary conditions should be considered more than other soil layers, the influence of different grouting pressures on the surface settlement of the sand and gravel soil layer is not obvious, the surface settlement caused by the water level reduction is greater than that caused by the water level reduction, and increasing the grouting pressure has a certain control effect on the ground settlement after precipitation.