宁波软土地区地铁工程施工期沉降规律研究

Settlement Law of Subway Engineering in Ningbo Soft Soil Area During Construction Period

在地铁工程的建设和运营中,沉降变形是主要的安全问题之一。将施工期宁波地铁一号线一期工程I～III标段上的基坑和盾构隧道做为研究样本,分析了宁波地区软土地质条件下地铁施工中各类沉降规律,主要包括基坑周围地表沉降规律、强烈影响区和一般影响区的分布规律、受基坑开挖影响的周边管线和建筑物沉降规律以及盾构隧道周边地表沉降规律等,可供与宁波地区相似地质条件的软基工程的设计、施工和监测方案制订等参考。

Settlement is one of the main safety problems in construction and operation of subway engineering. In this paper, the foundation pits and shield tunnels in the No.1 to No.3 sections of the first phase project of Ningbo metro line 1 during the construction period were researched. Kinds of settlement laws of this subway engineering were analyzed, mainly including the settlement law of the ground, pipelines and buildings around the foundation pits, and the distribution law of strong influence area and general influence area, also the law of ground subsidence around the shield tunnel. The laws can be used as references for the design, construction and monitoring of soft foundation engineering with similar geological condition.