某穿河顶管工程施工引发的地面沉降成因分析

Cause Analysis of Land Subsidence Caused by Construction of a River Crossing Pipe Jacking Project

随着社会的发展,越来越多的城区内穿越工程采用了非开挖的技术,其中顶管穿越是最常见、最成熟的穿越方式之一。城市的高速发展,施工场地周边的环境变得异常复杂,对顶管工程的勘察、设计、施工提出了更高的要求。如何既确保周边建筑、构筑物不受影响,又能在狭小的空间内顺利施工成为当前研究的主要问题。本文以某大型输水管道顶管穿越河流为例,分析其在施工时引发地面沉降的原因,为类似工程提供借鉴。

With the development of society,more and more urban crossing projects adopt trenchless technology,among which pipe jacking crossing is one of the most common and mature crossing ways.With the rapid development of the city,the environment around the construction site becomes extremely complex.The complex surrounding envi⁃ronment puts forward higher requirements for the survey,design and construction of pipe jacking engineering.How to ensure that the surrounding buildings and structures are not affected,and can be smoothly constructed in a narrow space has become the main problem of current research.In this paper,a large-scale water pipeline crossing the river by pipe jacking was taken as an example to analyze the causes of land subsidence during construction,so as to pro⁃vide reference for similar projects.