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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第9卷    第3期    总第47期    2012年6月

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文章编号:1672-7029( 2012) 03-0058-05
山岭地下复杂群洞开挖施工对环境影响的数值模拟研究
康富中1,贺少辉2

(1.中国建筑科学研究院地基所,北京100013; 2.北京交通大学土木学院,北京100044)

摘 要: 基于新建京张线八达岭地下车站超大跨及群洞的特点,采用大型非线性有限元软件ABAQUS 模拟大规模复杂洞室的开挖全过程,对深埋群洞11 种结构断面的整个开挖过程进行模拟分析,并且对开挖断面和开挖顺序进行优化,以尽可能地减少对围岩的扰动,特别是地表沉降控制,在计算过程中将地表沉降位移结果作为对环境的影响指标。计算结果表明:在地下群洞开挖过程中,由于群洞埋深较大的原因对地表的影响不大,引起的地表位移为3.5 mm,在允许的范围内,说明设计方案比较合理,对设计施工具有指导意义。

 

关键字: 深埋; 群洞; 开挖; 数值模拟; ABAQUS

Study on impact from mountain underground excavation of complex tunnel groups to the environment with numerical simulation
KANG Fu-zhong1,HE Shao-hui2

1.Institute of Foundation Engineering,CABR,Beijing 100013,China;
2.Department of Tunnel and Underground Engineering,Beijing Jiaotong University,Beijing 100044,China

Abstract:Based on the new Beijing-Zhangjiakou railway underground stations and the characteristics of large tunnel groups,The whole excavation process of large-scale complex group tunnels was simulated by large-scale nonlinear finite element software ABAQUS,especially the excavation of 11 kinds of deep-buried sectional structures.In addition,The excavation cross-section and the excavation order were optimized to reduce disturbance of the surrounding rock as much as possible,especially the control of ground surface subsidence.In the calculation process,the ground surface subsidence was taken as a target of environmental impact.The calculation results show that the excavation,due to beried greater depth the reasons for has little impact on the surface settlement due to the deep buried depth,and the surface displacement is 3.5 mm.In the allowed extent,it indicates that the design proposal is reasonable and and has guiding significance.

 

Key words: deep-buried; tunnel groups; excavation; numerical simulation; ABAQUS

ISSN 1672-7029
CN 43-1423/U

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