偏压富水软岩大断面隧道下穿建筑物地层变形及影响分析

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摘要偏压富水软岩大断面隧道施工引起的地层变形是多方面影响因素叠加的结果。结合武广高铁尖峰顶隧道下穿地表高压输电线塔的工程实践，首先对隧道施工前后地层变形监测和分析提出控制大变形的工程措施，然后采用综合统计和理论分析，研究地形条件、地层产状、隧道和通道施工、地面荷载、地表坍塌造成的地层变形与建筑物位移的关系，最后以流固耦合数值分析为手段对影响地层变形的关键因素进行量化分析。结果表明：(1) 偏压富水软岩大断面隧道下穿工程，地表地形引起的地层变形是影响地表建筑物水平位移和倾斜的主要因素；(2) 地层变形叠加效应对建筑物倾斜的影响存在明显的方向性，当多重因素引起的地层变形产生互逆方向位移叠加时对控制建筑物倾斜有利；(3) 软岩顺层斜坡地面下的大断面偏压隧道施工，地层变形在垂直于隧道轴线两侧呈非对称分布，变形最大区域位于向山坡侧；(4) 从影响地层变形长期效应上看，因施工引起的地层变形增量波动大但收敛快，地表地形引起的地层变形在施工后仍持续发展，成为影响建筑物安全性的长期潜在因素。

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关键词 ：隧道工程, 大断面偏压隧道, 近接施工, 地层变形, 变形监测, 流固耦合

Abstract：The strata deformation of large section water-abundant soft rock shallow tunnel under unsymmetrical pressure passing through existing structures would be effected by several factors. This article considers the Jianfengding tunnel on the Wuhan—Guangzhou high-speed railway when electricity pylons are present on the ground surface. First，the article describes the engineering measures needed as in-situ measured data to control large strata deformation. Second，statistical and theoretical analyses comprehensively studies the relationship between strata deformation and the impact of the existing building as affected by terrain condition，attitude of stratum，tunnelling construction，tunnel cross-hole construction，ground load，and ground collapse. Third，quantitative analysis is performed on strata deformation brought about by several critical factors and based on coupled fluid-mechanical numerical computation. The main results include：(1) the strata deformation result for the attitude of the stratum is a major factor that affects the horizontal displacement and obliquity of the buildings for these large-section，water-abundant tunnels shallow-buried through soft rock under unsymmetrical pressure；(2) the additive effects on strata deformation have directional properties so that the critical factors with inverse direction can control the obliquity of the structures or buildings well；(3) the strata deformation distributes disymmetrically along the tunnel central line and the regions of greatest deformation occur at the hillside where the unsymmetrical large-span tunnel is excavated under a slope with soft-rock bedding；and (4) in a longer time，the strata deformation change with large fluctuations brought about by the tunnel excavation rapidly converges. However，the strata deformation change brought about by the attitude of the stratum shows a more persistent oscillation after tunnel excavation，and this has a lasting effect on building safety.

Key words： tunnelling engineering large section bias pressure tunnel nearby excavation strata deformation deformation monitoring coupled fluid-solid

收稿日期: 2011-12-19

引用本文:

曹瑞琅，贺少辉，李子峰. 偏压富水软岩大断面隧道下穿建筑物地层变形及影响分析[J]. 岩石力学与工程学报, 2012, 31(5): 982-990.
CAO Ruilang，HE Shaohui，LI Zifeng. ANALYSIS OF STRATA DEFORMATION AND STRUCTURE IMPACT DUE TO LARGE SECTION WATER-ABUNDANT SOFT ROCK SHALLOW TUNNEL UNDER UNSYMMETRICAL PRESSURE PASSING THROUGH EXISTING STRUCTURE. , 2012, 31(5): 982-990.

链接本文:

http://www.rockmech.org/CN/Y2012/V31/I5/982

[1]	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，2009，31(5)：805-810.(ZHANG Chengping，ZHANG Dingli，WANG Mengshu. Structural deformation of overlying subway tunnels induced by tunnelling[J]. Chinese Journal of Geotechnical Engineering，2009，31(5)：805-810.(in Chinese))
[3]	张顶立，李鹏飞，侯艳娟，等. 城市隧道开挖对地表建筑群的影响分析及其对策[J]. 岩土工程学报，2010，32(2)：296-302. (ZHANG Dingli，LI Pengfei，HOU Yanjuan，et al. Influence due to urban tunnel excavation on ground buildings and its countermeasures[J]. Chinese Journal of Geotechnical Engineering，2010，32(2)：296-302.(in Chinese)) " target="_blank">
[4]	ATTEWELL P B，YEATES J，SELBY A R. Soil movements induced by tunneling and their effects on pipelines and structures[M]. New York：Chapman and Hall，1986：151-179. " target="_blank">
[5]	SHIN H S，KIM C Y，KIM K Y，et al. A new strategy for monitoring of adjacent structures to tunnel construction in urban area[J]. Tunnelling and Underground Space Technology，2006，21(5)：461-462. " target="_blank">
[7]	俞凯. 城市地铁隧道施工沉降对邻近建筑的影响研究[硕士学位论文][D]. 成都：西南交通大学，2008.(YU Kai. Investigation of influence of ground surface settlement induced by tunnel excavation on adjacent buildings[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2008.(in Chinese)) " target="_blank">
[10]	张虎. 地表注浆在隧道工程中的应用[J]. 公路，2006，(3)：204-209.(ZHANG Hu. Application of surface grouting surface to tunneling engineering[J]. Highway，2006，(3)：204-209.(in Chinese)) " target="_blank">
[11]	马海君，郝行舟. 浅谈地表注浆加固在不良地质隧道中的应用[J]. 交通科技，2005，(6)：67-69.(MA Haijun，HAO Xingzhou. An introduction to application of advanced grouting from ground to tunnels of unfavorable geological conditions[J]. Transportation Science and Technology，2005，(6)：67-69.(in Chinese)) " target="_blank">
[13]	李地元. 高速公路连拱隧道围岩应力场和渗流场的耦合作用分析[硕士学位论文][D]. 长沙：中南大学，2006.(LI Diyuan. Analysis of surrounding rock when coupled stress field and seepage field for multi-arch tunnel excavation on freeway[M. S. Thesis][D]. Changsha：Central South University，2006.(in Chinese)) " target="_blank">
[15]	覃卫民，赵荣生，王浩，等. 浅埋大跨隧道下穿建筑物的安全影响研究[J]. 岩石力学与工程学报，2010，29(增2)：3 762-3 768. (QIN Weimin，ZHAO Rongsheng，WANG Hao，et al. Study of building safety during shallow-buried large-span tunnel under passing[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.2)：3 762-3 768.(in Chinese)) " target="_blank">
[2]	SHARMA J S，HEFNY A M，ZHAO J，et al. Effect of large excavation on deformation of adjacent MRT tunnels[J]. Tunnelling and Underground Space Technology，2001，16(2)：93-98. " target="_blank">
[6]	RICHARD J，FINNO，FRANK T，et al. Evaluating damage potential in building affected by excavations[J]. Journal of Geotechnical and Geoenvironmental Engineering，2005，131(10)：1199-1210. " target="_blank">
[8]	李围，何川. 盾构隧道近接下穿地下大型结构施工影响研究[J]. 岩土工程学报，2006，28(10)：1 277-1 282.(LI Wei，HE Chuan. Study on construction influence of shield tunnels traversing adjacently under underground large-scale structure[J]. Chinese Journal of Geotechnical Engineering，2006，28(10)：1 277-1 282.(in Chinese)) " target="_blank">
[9]	张顶立，李鹏飞，侯艳娟，等. 浅埋大断面软岩隧道施工影响下建筑物安全性控制的试验研究[J]. 岩石力学与工程学报，2009，28(1)：95-102.(ZHANG Dingli，LI Pengfei，HOU Yanjuan，et al. Experimental study on safety control of buildings during construction of shallow-buried soft rock tunnel with large-section[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(1)：95-102. (in Chinese))
[12]	KOLYMBAS D，WAGNER P. Groundwater ingress to tunnels—the exact analytical solution[J]. Tunnelling and Underground Space Technology，2007，22(1)：23-27.
[14]	王梦恕. 地下工程浅埋暗挖技术通论[M]. 合肥：安徽教育出版社，2004：748-759.(WANG Mengshu. Technology of shallow tunnel excavation[M]. Hefei：Anhui Education Press，2004：748-759.(in Chinese)) " target="_blank">