Analysis of ground surface settlement induced by a large EPB shield tunnelling: a case study in Beijing, China
Analysis of ground surface settlement induced by a large EPB shield tunnelling: a case study in Beijing, China
复制标题
大型土压平衡盾构施工引起的地表沉降分析：以中国北京为例
DOI：
10.1007/s12665-019-8620-6
复制
发表时间：
2019-10-01
影响因子：
2.8
通讯作者：
Chen, GuoLiang
中科院分区：
文献类型：
--
作者：
Cheng, HongZhan;Chen, Jian;Chen, GuoLiang
随着城市建设需求的不断增长，大型盾构隧道因其经济性而越来越受到人们的青睐。盾构隧道施工产生的一个主要问题是地面沉降，这对现有结构至关重要。介绍了北京某大直径土压平衡盾构隧道施工引起的地表沉降问题。这项研究提供了重要的新的见解沉降槽参数值的经验方法。大型隧道横向沉降槽较窄。纵向沉降的发展可以分为四个阶段，并进一步提出了方法来评估相关的四个组成部分的体积损失。结果表明，所提出的方法可以有效地预测体积损失和相关的地面沉降在合理的精度通过比较收集的现场观测。此外，通过对真实的沉降进行分析，提出了未来大型土压平衡盾构隧道可实现的地表沉降范围。
Large size shield tunnels have been constructed with the increasing demands, because it offers cost efficiency in urban areas. One major problem created by shield tunnelling is that ground settlement occurs, which is crucial to existing structures. A detailed case study of surface settlement induced by the operation of a large-diameter earth pressure balance (EPB) shield tunnel in Beijing was presented. This study provides important new insights into the values of settlement trough parameters of empirical methods. The narrower transverse settlement trough was observed in large size tunnels. The development of longitudinal settlement can be divided into four stages, and methods were further proposed to assess the associated four components of volume loss. Results demonstrate that the proposed methods can efficiently predict the volume loss and the associated ground settlement within a reasonable accuracy by comparing with the collected field observations. In addition, a bandwidth of achievable surface settlement for future large EPB shield tunnels is suggested via performing analysis on real settlements.