期刊论文

Calculation method of the earth pressure for parallel pipe jacking with small spacing

Chen, Juan(chenjuan@hnust.edu.cn)

中文

工程科学学报

2095-9389

2021

43

10

1376-1384

10.13374/j.issn2095-9389.2021.03.17.002

国家自然科学基金资助项目（51678226）； 湖南省自然科学基金资助项目（2019JJ50150）；

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小间距顶管过程中,由于管-管相互作用的影响,使得管周土压力分布与单管顶进土压力分布模式产生差异,从而造成小间距顶管荷载确定、结构计算及顶力估算与控制等设计施工难题.结合数值模拟反分析,基于太沙基土压力理论和极限平衡理论,假设了土体松动线和上部既有顶管的支挡作用线,进一步构建了小间距平行顶管管道拱顶垂直土压力的计算方法.基于构建的土压力计算方法,分析了土体抗剪强度、管径、管间距等对新建顶管拱顶土压力的影响,并与不考虑既有顶管影响的土柱理论和太沙基理论计算值进行了对比.计算结果表明:土体抗剪强度越大,新建顶管拱顶垂直土压力越大,而其侧面的土压力越小;抗剪强度较大时...

With the increase in the urban underground buildings and the limitation of underground space, there are increasing double-line or even multi-line pipe jacking projects with small spacing. In the process of pipe jacking with small spacing, due to the influence of pipe-pipe interaction, the earth pressure distribution around the pipes changes greatly, which leads to difficulties in the load determination, structure calculation, and jacking force prediction and control. Combined with the back analysis of numerical simulation, based on Terzaghi's t...