平行隧道穿越形式对砌体建筑变形的影响研究
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摘要
为确保盾构隧道修建过程中上方建筑物的安全,基于天津地铁3号线和平路站至津湾广场站区间平行盾构穿越3座砌体建筑物的全过程现场监测结果,结合流固耦合数值模拟,分析双线平行盾构隧道以先行隧道下穿、后行隧道侧穿和先行隧道侧穿、后行隧道下穿2种不同的穿越形式掘进通过砌体建筑物时,建筑物的沉降与倾斜规律。研究结果表明:1)双线平行盾构隧道先下穿后侧穿时可对建筑物下伏地层产生二次损伤,这种穿越形式会加重影响与隧道走向呈小角度斜交的砌体建筑物的沉降与倾斜率,使其墙体的沉降曲线分布趋于"单斜状",墙体的倾斜率为先侧穿后下穿时的2倍; 2) 2种穿越形式对与隧道走向呈大角度斜交的砌体建筑物的沉降与倾斜率影响不大。
When tunnels cross underneath buildings,the safety of the buildings should be guaranteed. The site monitoring is carried out for parallel shield tunnels of Heping Road Station-Jinwan Square Station on Tianjin Metro Line No. 3 crossing underneath 3 masonry buildings; and the settlement and inclination of the buildings are analyzed when adopting 2 crossing modes,i. e. former tunnel underneath crossing + latter tunnel laterally crossing and former tunnel laterally crossing + latter tunnel underneath crossing,by fluid-solid coupling simulation method. The research results shows that:( 1) When adopting the crossing mode of former tunnel underneath crossing + latter tunnel laterally crossing,the settlement and inclination of the buildings would be increased,the settlement curve of the building wall shows approximately as a oblique line,and the inclination of the building wall is two times that when adopting the crossing mode of former tunnel laterally crossing + latter tunnel underneath crossing.( 2) The tunnels with the 2 crossing modes mentioned above affect the settlement and inclination of the building with large oblique crossing angle little.
When tunnels cross underneath buildings,the safety of the buildings should be guaranteed. The site monitoring is carried out for parallel shield tunnels of Heping Road Station-Jinwan Square Station on Tianjin Metro Line No. 3 crossing underneath 3 masonry buildings; and the settlement and inclination of the buildings are analyzed when adopting 2 crossing modes,i. e. former tunnel underneath crossing + latter tunnel laterally crossing and former tunnel laterally crossing + latter tunnel underneath crossing,by fluid-solid coupling simulation method. The research results shows that:( 1) When adopting the crossing mode of former tunnel underneath crossing + latter tunnel laterally crossing,the settlement and inclination of the buildings would be increased,the settlement curve of the building wall shows approximately as a oblique line,and the inclination of the building wall is two times that when adopting the crossing mode of former tunnel laterally crossing + latter tunnel underneath crossing.( 2) The tunnels with the 2 crossing modes mentioned above affect the settlement and inclination of the building with large oblique crossing angle little.
引文
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[17] LEE C J,WU B R,CHEN H T,et al. Tunnel stability and arching effects during tunneling in soft clayey soil[J].Tunnelling and Underground Space Technology,2006,21(2):119.
[2]姜晓婷,路平,郑刚,等.天津软土地区盾构掘进对上方建筑物影响分析[J].岩土力学,2014,35(增刊2):535.JIANG Xiaoting,LU Ping,ZHENG Gang,et al. Influences on the surface structure induced by shield tunneling in Tianjin soft ground area[J]. Rock and Soil Mechanics,2014,35(S2):535.
[3] JENCK O,DIAS D. 3-D finite difference analysis of the interaction between concrete building and shallow tunneling[J]. Géotechnique,2004,54(8):519.
[4]丁祖德,彭立敏,施成华.地铁隧道穿越角度对地表建筑物的影响分析[J].岩土力学,2011,32(11):3387.DING Zude, PENG Limin, SHI Chenghua. Analysis of influence of metro tunnel crossing angles on ground buildings[J]. Rock and Soil Mechanics,2011,32(11):3387.
[5]彭立敏,丁祖德,黄娟,等.隧道穿越方式对地表建筑物变形影响的数值分析[J].中南大学学报(自然科学版),2012,43(1):308.PENG Limin,DING Zude,HUANG Juan,et al. Numerical analysis of deformation influence of tunnel crossing types on ground building[J]. Journal of Central South University(Science and Technology),2012,43(1):308.
[6]柳厚祥,任志勇,陈思宇.隧道不同位置下穿施工引起邻近建筑物的变形分析[J].土木工程学报,2014,47(8):128.LIU Houxiang, REN Zhiyong, CHEN Siyu. Deformation analysis of adjacent buildings due to the construction of undercrossing tunnel[J]. China Civil Engineering Journal,2014,47(8):128.
[7]丁智,秦建设,魏新江,等.盾构掘进对邻近浅基础框架建筑物影响研究[J].重庆交通大学学报(自然科学版),2017,36(2):11.DING Zhi,QIN Jianshe,WEI Xinjiang,et al. Influence of shield tunneling on adjacent frame buildings on shallow foundation[J]. Journal of Chongqing Jiaotong University(Natural Sciences),2017,36(2):11.
[8]魏纲,魏新江.双线盾构施工对邻近框架建筑物影响的研究[J].地下空间与工程学报,2013,9(2):339.WEI Gang,WEI Xinjiang. Effect analysis of frame building crossed by double-line parallel shield tunnel[J]. Chinese Journal of Underground Space and Engineering,2013,9(2):339.
[9]徐泽民,韩庆华,郑刚,等.地铁隧道下穿历史风貌建筑影响的实测与分析[J].岩土工程学报,2013,35(2):364.XU Zemin, HAN Qinghua, ZHENG Gang, et al. Field monitoring and analysis of effects of metro tunnels under historic buildings[J]. Chinese Journal of Geotechnical Engineering,2013,35(2):364.
[10]徐礼华,艾心荧,余佳力,等.厦门机场路隧道施工对砌体结构建筑物的影响分析[J].岩石力学与工程学报,2010,29(3):583.XU Lihua,AI Xinying,YU Jiali,et al. Analysis of impact of tunnel construction on masonry buildings in Xiamen Airport Road[J]. Chinese Journal of Rock Mechanics and Engineering,2010,29(3):583.
[11]葛世平,廖少明,陈立生,等.地铁隧道建设与运营对地面房屋的沉降影响与对策[J].岩石力学与工程学报,2008,27(3):550.GE Shiping, LIAO Shaoming, CHEN Lisheng, et al.Influence of construction and operation of metro tunnel on settlement of ground buildings and countermeasures[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(3):550.
[12]孙宇坤.受盾构隧道施工影响的砌体结构房屋性状研究[D].杭州:浙江大学,2011.SUN Yukun. Research on mechanical behaviors of masonry building induced by shield tunneling[D]. Hangzhou:Zhejiang University,2011.
[13] ZHENG Gang,LU Ping,DIAO Yu. Advance speed-based parametric study of greenfield eeformation induced by EPBM tunneling in soft ground[J]. Computers and Geotechnics,2015,65:220.
[14]郑刚,路平,张稳军.盾壳摩擦对邻近单桩工作性状影响的研究[J].厦门大学学报(自然科学版),2016,55(2):297.ZHENG Gang,LU Ping,ZHANG Wenjun. Study of the influence of shield skin friction on adjacent single pile[J].Journal of Xiamen University(Natural Science),2016,55(2):297.
[15]危险房屋鉴定标准:JGJ 125—2016[S].北京:中国建筑工业出版社,2016.Standard for dangerous building appraisal:JGJ 125-2016[S]. Beijing:China Architecture&Building Press,2016.
[16]建筑地基基础设计规范:GB 50007—2011[S].北京:中国建筑工业出版社,2012.Code for design of building foundation:GB 50007-2011[S]. Beijing:China Architecture&Building Press,2012.
[17] LEE C J,WU B R,CHEN H T,et al. Tunnel stability and arching effects during tunneling in soft clayey soil[J].Tunnelling and Underground Space Technology,2006,21(2):119.