| 开挖卸荷引起地铁隧道位移预测方法 |
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| 引用本文： | 吉茂杰,刘国彬.开挖卸荷引起地铁隧道位移预测方法[J].同济大学学报(自然科学版),2001(5). |
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| 作者姓名： | 吉茂杰 刘国彬 |
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| 作者单位： | 同济大学地下建筑与工程系!上海200092 |
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| 摘 要： | 目前越来越多的基坑工程位于已建地铁隧道之上或两侧 .近距离基坑开挖土体卸荷势必引起隧道的位移变化 ,因此如何预测和控制隧道变形、确保隧道使用安全日趋重要 .为此研究了处于软土基坑之下的地铁隧道的位移变化规律 ,分析了基坑工程中时间、空间效应对隆起的影响规律 ,提出了时间、开挖宽度影响系数 ,推导出考虑基坑施工影响的隧道位移变形的实用计算方法
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| 关 键 词： | 软土 隆起 地铁隧道 时空效应 卸荷模量 残余应力 |
Prediction Method of Displacement of Subway Tunnel Due to Excavation |
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| JI Mao jie,LIU Guo bin.Prediction Method of Displacement of Subway Tunnel Due to Excavation[J].Journal of Tongji University(Natural Science),2001(5). |
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| Authors: | JI Mao jie LIU Guo bin |
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| Abstract: | More and more excavation projects are built above or adjacent to the tunnel,which,in such a close distance,will induce tunnel's displacement.How to control the displacement and protect tunnel is a very important thing.This paper studies the displacement rule of tunnel under excavation,the influence of time and space on the heave during the excavation,and proposes the affection coefficient of time and of excavation width as well.The paper also deduces theoretically a simple,convenient and feasible method of calculating tunnel's displacement in unsiderration of the influence of excavation construction. |
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| Keywords: | soft clay heave tunnel time and space effect unloading modulus residual stress |
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