摘要
随着城市的发展,在盾构地铁施工的过程中,对既有建筑(管线)的交叉穿越情况日益增多,对工程设计和施工造成极大困难,因此如何对地下建筑物在近距离条件下的施工影响减少到最低限度,是目前在在城市地铁施工过程中的核心技术问题。本文通过对某城市地铁1号线某区间超近距下穿大口径污水管为研究对象,利用FLAC3D建立数值模型,对盾构掘进施工过程中的土体扰动特点及其对已建管线产生的影响进行了分析研究,分析了盾构穿越过程中土压力对于位移场的影响以及土层沉降,为盾构施工的超前控制提出了有效的依据。
With the development of city,in the process of subway construction there are growing number of cases with the tunnel passing cross under the existing buildings（pipelines）,resulting in great difficulties for the engineering design and construction.Therefore,how to minimize the influence of tunnel construction on the building in close range is currently the core technical problem in urban subway construction.In this paper,taking the tunnel of Zhengzhou metro line No.1 passing through beneath a large diameter sewer as the study object,using FLAC3D to establish a numerical model for analyzing the impact of the shield tunneling construction process and characteristics of soil disturbance on the pipeline.The impact of the earth pressure on the displacement field and the soil settlement during the process of shield tunneling are analyzed,offering an effective method for the advanced control of shield construction.
出处
《地下空间与工程学报》
CSCD
北大核心
2011年第3期424-428,443,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金资助项目(40772179)
关键词
地铁
近距离穿越
FLAC3D
沉降
metro
passing through in close range
FLAC3D
settlement
