非对称超浅埋大偏压三层衬砌双连拱隧道施工方案优化
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摘要
为优化双连拱隧道施工方案降低围岩沉降量,以荣乌高速公路黄土岭隧道为依托,采用岩土分析软件GTS NX模拟黄土岭隧道的施工过程,定量分析了多种复杂情况下双连拱隧道在采用不同施工方案时围岩的应变情况,说明了隧道偏压情况下先开挖偏压较大一侧洞室有利于降低隧道围岩变形量以及三层衬砌中第一次初支较第二次初支对降低围岩变形量的影响更大,得出的优化方案可为今后相关的双连拱隧道施工提供科学依据与技术指导。
In order to optimize the double-arch tunnel construction scheme to reduce the settlement of surrounding rock, based on the Huangtuling tunnel of Rongwu Expressway, the geotechnical analysis software GTS NX was used to simulate the construction process of the Huangtuling tunnel, and the double-complexity under various complicated conditions was quantitatively analyzed. The strain of the surrounding rock in the arch tunnel with different construction schemes shows that the tunnel with the bias of the tunnel is biased, which is beneficial to reduce the deformation of the tunnel surrounding rock and the first initial branch of the three-layer lining. Compared with the second initial branch to reduce the deformation of surrounding rock, the optimized scheme can provide scientific basis and technical guidance for the construction of related double-arch tunnels in the future.
In order to optimize the double-arch tunnel construction scheme to reduce the settlement of surrounding rock, based on the Huangtuling tunnel of Rongwu Expressway, the geotechnical analysis software GTS NX was used to simulate the construction process of the Huangtuling tunnel, and the double-complexity under various complicated conditions was quantitatively analyzed. The strain of the surrounding rock in the arch tunnel with different construction schemes shows that the tunnel with the bias of the tunnel is biased, which is beneficial to reduce the deformation of the tunnel surrounding rock and the first initial branch of the three-layer lining. Compared with the second initial branch to reduce the deformation of surrounding rock, the optimized scheme can provide scientific basis and technical guidance for the construction of related double-arch tunnels in the future.
引文
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[3] 刘涛,沈明荣,袁勇.偏压连拱隧道围岩稳定性模型试验与数值分析[J].同济大学学报(自然科学版),2008,36(4):460-465.
[4] 申玉生,高波.双连拱隧道施工偏压力学特性的监测与分析研究[J].岩土力学,2006,27(11):2061-2065.
[5] 王军,夏才初,朱合华,等.不对称连拱隧道现场监测与分析研究[J].岩石力学与工程学报,2004,23(2):267-271.
[6] 王亚琼,张少兵,谢永利,等.浅埋偏压连拱隧道非对称支护结构受力性状分析[J].岩石力学与工程学报,2010,29(S1):3265-3272.
[7] 邓华.三层衬砌在高应力软岩隧道支护中的应用研究[J].矿冶工程,2016,36(2):28-31.
[8] 赖金星,牛方园,樊浩博,等.浅埋黄土隧道三层支护结构力学特性现场测试[J].岩土力学,2015,36(6):1769-1775,1783.
[9] 吴迪.隧道施工参数对地表沉降的影响研究[J].水利与建筑工程学报,2018,16(2):131-134.
[10] 韩吉珅,侯哲生,顾洋.深埋隧道软弱围岩管棚处理效果研究[J].水利与建筑工程学报,2017,15(2):86-91.
[11] MIDAS理论指南[M].北京:北京迈达斯技术有限责任公司,2005.
[12] 王海涛.MIDAS/GTS岩土工程数值分析与设计[M].大连:大连理工大学出版社,2013.
[13] 陶云平.软弱围岩隧道变形破坏机制及处治措施研究[J].华北水利水电大学学报(自然科学版),2016,37(1):69-72.
[14] 陈明祥.弹塑性力学[M].北京:科学出版社,2010.
[15] 中华人民共和国交通部.公路隧道设计规范:JTG D70—2004[S].北京:人民交通出版社,2004.
[16] 中华人民共和国交通部.公路隧道设计细则:JTG/T D70—2010[S].北京:人民交通出版社,2010.