深埋非对称连拱隧道过程荷载计算方法研究

doi:10.11779/CJGE202006009

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摘要深埋非对称连拱隧道具有几何非对称、结构形式非对称和左右荷载非对称等复杂的力学特性,其施工过程中的围岩压力演化及荷载计算尚无相应的规范和标准可循。面对目前理论研究滞后于工程实践的突出问题,基于过程荷载计算方法和普氏平衡理论的基本假设,在综合考虑了两侧洞室的非对称性和左右洞室施工过程以及后行洞开挖对先行洞松动荷载加剧影响的条件下,推导了深埋非对称连拱隧道过程荷载计算公式,对比了是否考虑施工过程两种工况对非对称连拱隧道各部分荷载的影响;最后结合具体的工程案例,从实用角度论证了所推导公式的合理性,为今后同类工程施工方案的确定和支护结构的设计和优化提供参考。

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	高红杰
	何平
	陈峥

关键词 ：非对称连拱隧道, 过程荷载, 计算, 施工过程

Abstract：Deep-buried asymmetric multi-arch tunnels have complex mechanical features such as geometric asymmetry, structural asymmetry and left-to-right load asymmetry. There have been no relevant codes and standards for the process of construction on the pressure evolution of surrounding rocks and load calculation. It is an outstanding problem that the basic theory lags behind on reality in project practice. Based on the calculation of process load and the assumption of the Protodyakonov's theory, the formula for calculating process load of deep-buried asymmetric multi-arch tunnels is derived with synthetical considerations of the asymmetry and the construction process of two cavities of a tunnel as well as the influences of the excavation of the back hole on the increase of the loosening load of the first hole, and the two conditions are compared to see whether the influences of construction process on the load of each part of asymmetric multi-arch tunnel are taken into account or not. Finally, based on specific projects, the derived formula is proved to be valid from practical angle. It may provide a reference for the determination of similar construction schemes and the design and optimization of supporting structures in the future.

Key words： asymmetric multi-arch tunnel process load calculation construction process

收稿日期: 2019-07-02

ZTFLH:

TU43

基金资助:国家重点研发计划资助项目(2017YFC0805401)

作者简介: 高红杰(1990— ),男,博士研究生,主要从事隧道与地下工程方面的研究。E-mail: 16115293@bjtu.edu.cn。

引用本文:

高红杰, 何平, 陈峥. 深埋非对称连拱隧道过程荷载计算方法研究[J]. 岩土工程学报, 2020, 42(6): 1059-1066. GAO Hong-jie, HE Ping, CHEN Zheng. Calculation of process load of deep-buried asymmetric multi-arch tunnels. Chinese J. Geot. Eng., 2020, 42(6): 1059-1066.

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http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/10.11779/CJGE202006009 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2020/V42/I6/1059

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