浅埋暗挖法下穿既有盾构隧道的变形特性分析

doi:10.13722/j.cnki.jrme.2014.s2.065

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摘要北京地铁6号线平安里—北海北站区间下穿既有4号线区间隧道工程为北京地区首例暗挖隧道下穿盾构隧道工程。依托该工程，通过12个地表沉降监测断面及既有盾构隧道变形实测数据的统计，分析新建隧道与既有结构的相互影响，对地层及既有结构的变形特性取得以下认识：(1) 非下穿段暗挖隧道地表最大沉降值随其埋深增大而减小；双线隧道间距小于2.0D(D为单线隧道宽度)时，地表沉降模式为“单凹槽状”，间距大于2.0D时，则为“双凹槽状”；下穿段既有结构呈“双凹槽状”变形，地表沉降模式为“单凹槽状”。(2) 盾构隧道结构呈柔性变形，纵向柔性更为明显，下穿段既有结构的最大沉降值分别为7.32，6.69 mm，结构变形损失率分别为0.36%，0.45%，结构纵向沉降变形宽度系数为0.41～2.43。(3) 下穿段地表最大沉降值为非下穿段的24%～27%，地表沉降槽宽度系数是非下穿段的1.2～2.3倍。既有结构的存在及地层的深孔注浆加固显著减小了暗挖隧道引起的地表沉降值，增大了地表沉降槽宽度。该研究成果可为今后类似工程提供参考。

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	李倩倩1
	张顶立1
	房倩1
	李栋2

关键词 ：隧道工程, 既有隧道变形, 地层变形, 现场实测

Abstract：Using shallow tunneling method，tunnels between Pinganli and Beihaibei of Beijing Metro Line 6 traverse adjacently under Line 4 which is a shield tunnel. To obtain the deformation law of existing structures and ground surface settlement，the measured displacement of ground surface settlement and existing structures were analyzed. The research shows that：(1) For the stratum in non-crossing part，the maximum values of settlement decrease with the increase of buried depth of tunnel. If center distance between two tunnels is less than 2D，the surface subsidence is “single groove” shaped，otherwise the surface subsidence is “double grooves” shaped. In the crossing part，deformation of existing structures is “double groove”shaped，the surface subsidence is “single groove”shaped. (2) The maximum ground surface settlement of existing structures are 7.32 mm and 6.69 mm. The values of V are 0.36%，0.45%，the values of K range from 0.41 to 2.43. (3) The maximum ground surface settlement in crossing part is about 24%–27% of that in-non crossing part and the value of K is about 1.2–2.3 times. The research result can provide reference to the similar engineering.

Key words： tunnelling engineering deformation of existing tunnel ground deformation field measurement

引用本文:

李倩倩1，张顶立1，房倩1，李栋2. 浅埋暗挖法下穿既有盾构隧道的变形特性分析[J]. 岩石力学与工程学报, 2014, 33(S2): 3911-3918.
LI Qianqian1，ZHANG Dingli1，FANG Qian1，LI Dong2. Study oF deformation characteristics of tunnels traversing adjacently under shield tunnels by shallow tunneling method. , 2014, 33(S2): 3911-3918.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.065 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/3911

[1] 韩煊，刘赪炜，STANDING J R. 隧道下穿既有线的案例分析与沉降分析方法[J]. 土木工程学报，2012，45(1)：134–141.(HAN Xuan，LIU Chengwei，STANDING J R. Structural settlement of existing tunnel caused by new tunnel excavated underneath[J]. China Civil Engineering Journal，2012，45(1)：134–141.(in Chinese))

[2] 张成平，张顶立，王梦恕. 大断面隧道施工引起的上覆地铁隧道结构变形分析[J]. 岩土工程学报，2009，35(5)：805–810.(ZHANG Chengping，ZHANG Dingli，WANG Mengshu. Structural deformation of overlying subway tunnels induced by tunneling[J]. Chinese Journal of Geotechnical Engineering，2009，35(5)：805–810.(in Chinese))

[3] 陈孟乔，杨广武. 新建地铁车站近距离穿越既有地铁隧道的变形控制[J]. 中国铁道科学，2011，32(4)：53–59.(CHEN Mengqiao，YANG Guangwu. Deformation control of a newly-built subway station crossing the adjacent existing subway tunnel[J]. China Railway Science，2011，32(4)：53–59.(in Chinese))

[4] 沈良帅，贺少辉. 复杂环境条件上跨下穿同一既有地铁隧道的变形控制分析及施工方案优化[J]. 岩石力学与工程学报，2008，27(增1)：2 893–2 900.(SHEN Liangshuai，HE Shaohui. Subsidence controlling and construction scheme optimization of cutting across and under passing an existing metro tunnel under complex environmental conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.1)：2 893–2 900.(in Chinese))

[5] 房倩，张顶立. 浅埋暗挖地铁车站下穿既有线结构施工方法研究[J]. 中国铁道科学，2007，28(5)：71–77.(FANG Qian，ZHANG Dingli. Study on the shallow tunnel construction methods for a new built subway station passing through the bottom of the existing subway[J]. China Railway Science，2007，28(5)：71–77.(in Chinese))

[6] 王占生，张顶立. 浅埋暗挖隧道近距下穿既有地铁的关键技术[J]. 岩石力学与工程学报，2007，26(增2)：4 208–4 214.(WANG Zhansheng，ZHANG Dingli. Key techniques on shallow embedded tunnel constructed beneath existing subway tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：4 208–4 214.(in Chinese))

[7] 王良. 盾构法施工在北京地铁5号线的应用[J]. 都市快轨交通，2004，17(5)：33–37.(WANG Liang. Application of shield tunneling method in Beijing metro line 5[J]. Urban Rapid Rail Transit，2004，17(5)：33–37.(in Chinese))

[8] BURLAND J B，STANDING J R，JARDINE F M. Building response to tunnelling，case studies from construction of the Jubilee Line extension[C]// Project and Methods. London：Thomas Telford Publishing，2001：509–545.

[9] 李东海，刘军，萧岩，等. 盾构隧道斜交下穿地铁车站的影响与监测研究[J]. 岩石力学与工程学报，2009，28(增1)：3 186–3 192. (LI Donghai，LIU Jun，XIAO Yan，et al. Research on influence and monitoring of shield tunnel obliquely crossing beneath existing subway station[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：3 186–3 192.(in Chinese))

[10] 汪洋，何川，曾东洋，等. 盾构隧道正交下穿施工对既有隧道影响的模型试验与数值模拟[J]. 铁道学报，2010，32(2)：79–85.(WANG Yang，HE Chuan，ZENG Dongyang，et al. Model test and numerical simulation of influence of perpendicular undercross shield tunnel construction on existing tunnel[J]. Journal of the China Railway Society，2010，32(2)：79–85.(in Chinese))

[11] 胡军，杨小平，刘庭金. 盾构下穿施工对既有隧道影响的数值模拟分析[J]. 铁道建筑，2012，(10)：50–54.(HU Jun，YANG Xiaoping，LIU Tingjin. Numerical simulation on influence of undercross shield tunnel construction on existing tunnel[J]. Railway Engineering，2012，(10)：50–54.(in Chinese))

[12] 房明，周翠英，刘镇. 交叉隧道盾构施工参数与交叉角度对既有隧道的沉降影响研究[J]. 工程力学，2011，28(12)：133–138.(FANG Ming，ZHOU Cuiying，LIU Zhen. Influence of construction parameters and cross angle on existing tunnel settlement during undercrossing shield tunneling construction[J]. Engineering Mechanics，2011，28(12)：133–138.(in Chinese))

[13] 刘波，陶龙光，丁城刚，等. 地铁双隧道施工诱发地表沉降预测研究与应用[J]. 中国矿业大学学报，2006，35(3)：356–361.(LIU Bo，TAO Longguang，DING Chenggang，et al. Prediction for ground subsidence induced by subway double tube tunneling[J]. Journal of China University of Mining and Technology，2006，35(3)：356–361.(in Chinese))

[14] PECK R B. Deep Excavation and tunneling in soft ground[C]// State of the Art Report，7th International Conference on Soil Mechanics and Foundation Engineering. Mexico：[s.n.]，1969：225–290.

[15] ATTEWELL P B. Engineering contract，site investigation and surface movements in tunneling works[C]// Balkema A A ed. Soft Ground Tunneling-Failures and Displacement. Rotterdam：[s.n.]，1981：5–12.

[16] MAIR R J. Ground movement around shallow tunnels in soft clay[J]. Tunnels and Tunneling，1982，(6)：33–38.

[17] YOSHIKOSHI W，WATANABE O，TAKAGI N. Prediction of ground settlements associated with shield tunneling[J]. Soils and Foundations，1978，18(4)：47–59.

[18] NEW B M，O¢REILLY M P. Tunneling induced ground moments：predicting their magnitude and effects[C]// Proceedings of the International Conference on Ground Movements and Structures. Cardiff：Wales，1991：671–697.

[19] 李倩倩，张顶立，张成平. 不同埋深下暗挖隧道施工的地层响应[J]. 北京交通大学学报，2013，37(1)：27–33.(LI Qianqian，ZHANG Dingli，ZHANG Chengping. Study on ground response caused by undercutting subway tunnel under different overburden depths[J]. Journal of Beijing Jiaotong University，2013，37(1)：27–33.(in Chinese))

[20] 韩煊，李宁，STANDING J R. Peck公式在我国隧道施工地面变形预测中的适用性分析[J]. 岩土力学，2007，28(1)：23–35.(HAN Xuan，LI Ning，STANDING J R. An adaptability study of Gaussian equation applied to predicting ground settlements induced by tunneling in China[J]. Rock and Soil Mechanics，2007，28(1)：23–35.(in Chinese))

[21] 姜忻良，赵志民，李圆. 隧道开挖引起土层沉降槽曲线形态的分析与计算[J]. 岩土力学，2004，25(10)：1 542–1 544.(JIANG Xinliang，ZHAO Zhimin，LI Yuan. Analysis and calculation of surface and subsurface settlement trough profiles due to tunneling[J]. Rock and Soil Mechanics，2004，25(10)：1 542–1 544.(in Chinese))