不同掘进工法下软岩中深埋小净距隧道变形规律研究

贾锋; 杜永强; 杨文波; 聂金诚; 寇昊; 肖龙鸽

doi:10.13204/j.gyjzG22091803

不同掘进工法下软岩中深埋小净距隧道变形规律研究

doi: 10.13204/j.gyjzG22091803

1. 中国建设基础设施有限公司, 北京 100044;
2. 中建隧道建设有限公司, 重庆 401320;
3. 西南交通大学交通隧道工程教育部重点实验室, 成都 610031;
4. 中国建筑股份有限公司, 北京 100037

基金项目:

中建股份科技研发计划资助项目(CSCEC-2021-Z-26)。

详细信息

作者简介:
贾锋,男,1979年出生,博士,教授级高级工程师,1152834287@qq.com。

通讯作者:
杨文波,男,1985年出生,博士,教授,yangwenbo1179@hotmail.com。

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出版历程
- 收稿日期: 2022-09-18

Research on Deformation Laws of Deeply Buried Tunnels with Small Clearance in Soft Rock by Different Tunnelling Methods

1. China Construction Infrastructure Co., Ltd., Beijing 100044, China;
2. China Construction Tunnel Co., Ltd., Chongqing 401320, China;
3. Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;
4. China State Construction Engineering Corporation, Beijing 100037, China

摘要

摘要: 为探究软岩中深埋条件下小净距隧道左、右隧道掘进的相互扰动影响,依托华丽高速东马场1号隧道工程,通过对现场实测数据的分析及数值模拟,对软岩中深埋小净距隧道左、右隧道采用不同掘进工法和掌子面间距掘进时隧道的变形规律展开研究。结果表明:掘进时,左、右隧道存在相互扰动现象,先行隧道水平收敛变形明显大于后行隧道;掘进工法对隧道变形影响较大,双隧道均采用三台阶掘进,相较采用两台阶掘进的变形量最大减小13%;先行隧道采用三台阶掘进,后行隧道采用两台阶掘进的变形量相较双隧道均采用两台阶掘进最大减小12%,与双隧道均采用三台阶掘进的变形结果相近;左、右隧道掌子面间距对拱顶沉降影响较小,而对隧道水平收敛变形影响较大,随着掌子面间距的增大,变形稳定时间延长,水平位移逐渐减小,且在间距达到50 m后变形减小趋势变缓。综合考虑隧道施工工期、建设成本及隧道变形控制效果,建议软岩中深埋小净距隧道采用先行隧道三台阶掘进、后行隧道采用两台阶掘进的施工方案,将掌子面间距控制在50 m以上,以减小两隧道的相互扰动。
- 公路隧道 /
- 变形规律 /
- 数值模拟 /
- 小净距 /
- 深埋隧道 /
- 软岩
Abstract: To explore the mutual disturbance effect due to tunnelling of deeply buried the left and right tunnels with small clearance in soft rock, based on tunnel 1 of Dongmachang in Huali High-Speed Project, through field measured data analysis and numerical simulations, the deformation laws of tunnels with small clearance by dififerenent tunnelling methods for the and left and right tunnels in different clearances between working faces in deeply soft rock were studied. The results indicated that there was mutual disturbance between the left and right tunnels during tunnelling and the horizontal convergent deformation of the tunnel first was obviously larger than that of the tunnel later. The tunnelling method had a great influence on the deformation of tunnels, and the deformation by the three-step tunnelling for both double tunnels was 13% less than that by the two-step tunnelling. The deformation by the three-step tunnelling for the tunnel first and the two-step tunnelling for the tunnel later decreased by 12% than that by the three-step tunnelling for both tunnels, which was similar to that by the three-step tunnelling for both tunnels. The clearance between the left and right tunnels had a little influence on the settlement of the vault, but had a great influence on the horizontal convergence deformation of tunnels. With the increase of the clearance between working faces of the left and right tunnels, the time for deformation stability prolonged, the horizontal displacement gradually decreased, and the deformation decreased slowly when the clearance was up to 50 m. Comprehensively considering the construction period, construction cost and tunnel deformation control effect, the scheme for the tunnel first by the three-step tunnelling and the tunnel later by two-step tunnelling was suggested to tunnels with small clearance in deeply soft rock.If the clearance between working faces could be controlled beyond 50 m,the mutual disturbance between the both tunnels would be reduced.
- highway tunnel /
- deformation law /
- numerical simulation /
- small clearance /
- deeply buried tunnel /
- soft rock

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参考文献(18)

[1]	张志强,黄朱林,韩飞.非对称小净距隧道施工力学特性研究及方案优化[J].现代隧道技术,2007(6):22-26.
[2]	王小林,张亮,李冀伟,等.断面非对称小净距黄土地铁隧道施工顺序模拟对比研究[J].城市轨道交通研究,2015,18(9):100-105.
[3]	刘春,邱浩,尹辉.非对称小净距隧道施工顺序及施工方法研究[J].科学技术创新,2020(26):156-160.
[4]	胡展.不同施工顺序下小净距隧道稳定性分析[J].科学技术创新,2021(20):100-101.
[5]	李伟聪.非对称小净距隧道合理施工方法和工序分析[J].山西建筑,2013,39(29):151-153.
[6]	江帆.城区大断面浅埋小净距隧道全断面掘进条件下围岩力学特性分析[J].江西建材,2020(12):132-135.
[7]	侯福金,孙克国,赵然,等.超大断面小净距隧道工法适用性研究[J].土木工程学报,2017,50(增刊1):111-116.
[8]	王更峰,熊晓晖,张永兴,等.大跨小净距隧道合理掘进方法与支护参数对比研究[J].公路交通科技,2011,28(3):101-107.
[9]	陈平.小净距隧道掘进工法合理性研究[J].铁道工程学报,2018,35(4):65-69.
[10]	林从谋,张在晨,郑强,等.小净距隧道原位二扩四CD工法软弱围岩稳定性及支护参数研究[J].土木工程学报,2013,46(7):124-132.
[11]	WU F Y, HE C, KOU H, et al. Discussion on reasonable clear spacing of twin-tunnels in weak surrounding rock:analytical solution and numerical analysis[J]. KSCE Journal of Civil Engineering, 2022,26:2428-2442.
[12]	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.
[13]	钟桂彤.铁路隧道[M].北京:中国铁道出版社, 1996.
[14]	刘志春,朱永全,李文江,等.挤压性围岩隧道大变形机理及分级标准研究[J].岩土工程学报, 2008(5):690-697.
[15]	张祉道.关于挤压性围岩隧道大变形的探讨和研究[J].现代隧道技术, 2003(2):5-12.
[16]	熊晓晖,张旭东,王更峰,等.挤压性围岩隧道变形控制技术研究[C]//川藏铁路工程建造技术研讨会论文集.2019:285-289.
[17]	中铁二局集团有限公司.不良地质隧道的掘进及支护技术研究总报告及分项报告[R].成都:中铁二局集团有限公司,2000.
[18]	徐国文,何川,代聪,等.复杂地质条件下软岩隧道大变形破坏机制及掘进方法研究[J].现代隧道技术,2017,54(5):146-154.