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地下负二层施工对既有隧道结构的影响
引用本文:耿永常,于素慧,王绍君. 地下负二层施工对既有隧道结构的影响[J]. 解放军理工大学学报(自然科学版), 2014, 0(3): 252-257
作者姓名:耿永常  于素慧  王绍君
作者单位:哈尔滨工业大学 土木工程学院,黑龙江 哈尔滨 150090
基金项目:国家自然科学基金资助项目(51108135)
摘    要:为分析地下工程近接施工过程中对已建地下结构的位移及受力影响情况,以某地下商业街近接既有地铁隧道施工为依托,考虑既有地铁隧道结构存在的影响,对拟建的地下商业街负二层结构在施工过程中对负一层结构的影响进行研究。以地下商业街负一层结构施工结束为初始应力状态,通过有限元软件MIDAS/GTS对负二层结构的施工过程进行数值模拟,分析负一层结构的位移及内力变化情况,以及施工过程的安全可行性。分析结果表明,负一层地下结构位移及弯矩的变化均在合理范围内,且既有隧道的存在可以减少负一层结构受负二层施工的影响。

关 键 词:地下工程  数值模拟  近接施工
收稿时间:2014-03-31

Influence of negative second structure construction considering existing tunnel
GENG Yongchang,YU Suhui and WANG Shaojun. Influence of negative second structure construction considering existing tunnel[J]. Journal of PLA University of Science and Technology(Natural Science Edition), 2014, 0(3): 252-257
Authors:GENG Yongchang  YU Suhui  WANG Shaojun
Affiliation:School of Civil Engineering,Harbin Institute of Technology,Harbin,150090,China
Abstract:To analyze the change of displacement and stress in the approaching construction process of underground engineering,based on the underground commercial street approaching the existing metro tunnel structure, considering the influence of the existing metro tunnel structure, the influence on negative one structure was discussed during the construction process of proposed underound commercial street negative second structure. The end of the negative one structure construction was considered as the initial stress state, the construction process of the negative second structure was simulated by finite element software MIDAS/ GTS, and the changes of displacement and stress for the negative one structure, and the safety and feasibility during the approaching construction process were analyzed.The results show that the changes of displacement and moment of the negative one structure are in the reasonable range, and the existing tunnel can reduce the influence of the negative second structure construction on the negative one structure, and play a beneficial role.
Keywords:underground engineering   numerical simulation   approaching construction
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