不同埋深盾构双隧道及开挖顺序对临近管线的影响研究

doi:10.16285/j.rsm.2017.09.004

›› 2017, Vol. 38 ›› Issue (9): 2487-2495.doi: 10.16285/j.rsm.2017.09.004

不同埋深盾构双隧道及开挖顺序对临近管线的影响研究

马少坤^{1, 2}，邵羽^{1, 3}，刘莹^{1, 2}，冯野¹，韦朝华¹

1. 广西大学土木建筑工程学院，广西南宁 530004；2. 广西大学工程防灾与结构安全重点实验室，广西南宁 530004； 3. 广西科技大学土木建筑工程学院，广西柳州 545006

收稿日期:2016-07-23 出版日期:2017-09-11 发布日期:2018-06-05
通讯作者: 刘莹，女，1985 年生，博士后，从事岩土工程方面的科研和教学工作。E-mail: lyily1112@126.com E-mail: mashaokun@sina.com
作者简介:马少坤，男，1972年生，博士，教授，博士研究生导师，主要从事地下工程的教学与科研工作。
基金资助:
国家自然科学基金（No.41362016，No.51678166，No.51508113）；广西岩土力学与工程重点实验室资助课题（No.13-KF-02）。

Effects of construction sequences of twin tunneling at different depths on the adjacent pipeline

MA Shao-kun^{1, 2}, SHAO Yu^{1, 3}, LIU Ying^{1, 2}, FENG Ye¹, WEI Chao-hua¹

1. College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi 530004, China; 2. Key Laboratory of Disaster Prevention and Structural Safety, Guangxi University, Nanning, Guangxi 530004, China; 3. College of Civil and Architectural Engineering, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, China

Received:2016-07-23 Online:2017-09-11 Published:2018-06-05
Supported by:
This work was supported by the National Natural Science Foundation of China (41362016, 51678166, 51508113) and the Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering (13-KF-02).

摘要/Abstract

摘要： 以不同埋深双隧道、不同开挖顺序对临近地埋管线的影响为研究目的，在离心模型试验中同时考虑隧道开挖所致地层损失效应和质量损失效应，并采用考虑土体非线性小应变特性的HP（Hypoplasticity亚塑性）模型和基于地层损失比的位移控制法进行有限元模拟分析。研究结果表明，不同埋深双隧道、不同开挖顺序对地表沉降、管线沉降及管线弯曲应变的影响较大。双隧道开挖完成后管线下凸区（管线底部受拉区）分布范围为-2.5DT～1.5DT（DT为隧道外径），且管线下凸区最大弯曲应变约为管线上凸区（管线底部受压区）最大弯曲应变的2倍。不应简单采用叠加原理对不同埋深先后开挖双隧道所致地表沉降、管线沉降及管线弯曲应变进行预测，应合理考虑后继隧道开挖所致土体的累积剪切应变及管-土相对刚度对预测结果的影响。

关键词: 三维离心模型试验, 三维数值模拟, 双隧道, 开挖顺序, 隧道-管-土相互作用

Abstract: The aim of this study is to investigate the effects of construction sequences of twin tunneling at different depths on the adjacent pipeline. A three-dimensional (3D) centrifuge model test was conducted by considering both the volume loss effect and the weight loss effect during the tunnel excavation. Moreover, the corresponding numerical simulation of this centrifuge model test was carried out, which further considered a displacement controlled method based on ground loss and an advanced hypoplastic constitutive model based on nonlinear small strain characteristics of soil. It reveals that twin tunnels at different depths with various construction sequences greatly affects the greenfield surface settlements, the pipeline settlements and the pipeline bending strain. After the twin tunneling, the sagging regions are located within the range of -2.5DT－1.5DT and the maximum bending strain within the sagging regions is around two times that within the hogging regions. The results indicate that the superposition principle cannot be simply applied to predict the surface settlements, the pipeline settlements and the pipeline bending strain caused by twin tunneling at different depths with various construction sequences. The effects of the accumulated shear strain and the relative pipe-soil rigidity should be reasonably considered.

Key words: 3D centrifuge modeling, 3D numerical analysis, twin tunnels, construction sequences, tunnel-pipeline-soil interaction

中图分类号:

TU 470

马少坤，邵羽，刘莹，冯野，韦朝华，. 不同埋深盾构双隧道及开挖顺序对临近管线的影响研究[J]. , 2017, 38(9): 2487-2495.

MA Shao-kun, SHAO Yu, LIU Ying, FENG Ye, WEI Chao-hua，. Effects of construction sequences of twin tunneling at different depths on the adjacent pipeline[J]. , 2017, 38(9): 2487-2495.

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不同埋深盾构双隧道及开挖顺序对临近管线的影响研究

Effects of construction sequences of twin tunneling at different depths on the adjacent pipeline

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