Approach to earth balance pressure of shield tunneling across ultra-near metro tunnel in operation

被引：0

作者：

Liao Shao-ming ^{[1
]}

Yang Jun-long ^{[2
]}

Xi Cheng-lei ^{[1
]}

Peng Fang-le ^{[1
]}

Hou Xue-yuan ^{[1
]}

机构：

[1] Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China

[2] Shanghai Second Municipal Engn Construct Co Ltd, Shanghai 200092, Peoples R China

来源：

ROCK AND SOIL MECHANICS | 2005年 / 26卷 / 11期

关键词：

metro tunnel; shield; ultra-near construction; earth balance pressure;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The affecting factors and sensitivity of the displacement fields produced by the shield tunneling across the ultra-near tunnel obviously differ from that of the general construction. Combining the metro tunneling examples within ultra-near distance (1.05 m) in Shanghai, It is found that the earth pressure varies significantly while shield approaching to adjacent metro tunnel in operation situated overhead. Based on the principles of tunnel loading model and theory of elasticity a, theoretical formula of earth balance pressure of shield was deduced and a so-called "step control strategy" was concluded which was successfully applied in a typical project of Shanghai metro tunnel line No. 4 of which the maximum displacement was controlled within 5 mm. The field measurements of earth pressure proved to be at good coincidence with the theoretical values.

引用

页码：1727 / 1730

页数：4