基于随机介质理论的隧道开挖地表沉降规律研究
|
摘要
地铁多为近距离双线并行隧道,隧道开挖时相互影响造成了地表的不规则沉降与叠加,其预测与控制已成为一个亟待解决的难题。基于随机介质理论,将直角坐标系转化为局部极坐标系,得到了任意断面形状的单线、双线隧道开挖引起的地表沉降公式。以哈尔滨地铁3号线某区间大断面隧道与标准断面隧道开挖为例,基于随机介质理论极坐标表达式,得到了不同断面形状、尺寸的并行隧道开挖地表沉降量及其分布规律。通过预测曲线与实测及数值模拟曲线的对比,验证了用随机介质理论极坐标表达式预测并行隧道开挖引起地表沉降的科学性和可靠性。
Most metro tunnels are two-line parallel tunnels with a short interval range. The interaction resulted from the excavation of two tunnels could bring about the irregular settlement and superposition, the prediction and control of settlement has become an urgent scientific problem. Based on the stochastic medium theory, transforming the rectangular coordinate system into the local polar coordinate system, the equations of ground settlement caused by the excavation of single-line tunnel and two-line tunnels with different cross-section shapes are obtained. We take the excavation of a large cross-section and a standard cross-section of Harbin Metro Line 3 as example. The ground settlement and its distribution law caused by excavation of the parallel tunnels with different cross-section shapes and sizes are obtained by using the deduced polar coordinates equations. The comparing the predicted curve to the measured and numerical simulation curves shows that the polar coordinates equations of stochastic medium theory are scientific and reliable in predicting the ground settlement caused by the excavation of parallel tunnels.
Most metro tunnels are two-line parallel tunnels with a short interval range. The interaction resulted from the excavation of two tunnels could bring about the irregular settlement and superposition, the prediction and control of settlement has become an urgent scientific problem. Based on the stochastic medium theory, transforming the rectangular coordinate system into the local polar coordinate system, the equations of ground settlement caused by the excavation of single-line tunnel and two-line tunnels with different cross-section shapes are obtained. We take the excavation of a large cross-section and a standard cross-section of Harbin Metro Line 3 as example. The ground settlement and its distribution law caused by excavation of the parallel tunnels with different cross-section shapes and sizes are obtained by using the deduced polar coordinates equations. The comparing the predicted curve to the measured and numerical simulation curves shows that the polar coordinates equations of stochastic medium theory are scientific and reliable in predicting the ground settlement caused by the excavation of parallel tunnels.
引文
[1] 裴春,李俊才,郭亮,等.地铁隧道沉降规律多因素分析[J].南京工业大学学报(自然科学版),2014,36(6):104-110.
[2] 李金奎,王飞飞,白会人.浅埋暗挖地铁隧道施工地表沉降规律分析[J].武汉工程大学学报,2012,34(10):58-61.
[3] 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.
[4] 佘芳涛,王永鑫,张玉.黄土地层地铁暗挖隧道地表纵向沉降规律及其预测分析方法[J].岩土力学,2015(S1):287-292.
[5] Peck R B.Deep excavations and tunnelling in soft ground[C]//Proceeding of the 7th International Conference of Soil Mechanics and Foundation Engineering,Mexico:BALKEMA A A.1969:225-290.
[6] Attewell P B,Woodman J P.Predicting the dynamics of ground settlement and its derivatives caused by tunnelling in soil[J].Ground Engineering,1982,15(8):13-36.
[7] 胡斌,胡启晨,冯晓腊,等.基于灰色理论的地铁隧道沉降预测分析[J].人民长江,2012,43(S1):183-185.
[8] 周志广,冀彦卓.地铁施工引发地面沉降的BP神经网络预测分析[J].地质灾害与环境保护,2014(3):97-102.
[9] 王建秀,邹宝平,陈学军,等.填海区地铁盾构隧道下穿公路施工地层沉降规律的数值模拟[J].中国铁道科学,2013,34(4):33-39.
[10] 苑艺.地面沉降对地铁隧道影响机制的模型试验研究[D].西安:长安大学,2014.
[11] Litwiniszyn J.The theories and model research of movements of ground masses[C]//Proceedings of European Congress Ground Movement,Leeds,UK,1957:203-209.
[12] 阳军生.城市隧道施工引起的地表移动及变形[M].北京:中国铁道出版社,2002.
[13] 韩煊.隧道施工引起地层位移及建筑物变形预测的实用方法研究[D].西安:西安理工大学,2006.
[14] 袁杰.地铁隧道开挖诱发的地表沉降与变形预测分析[D].北京:北京交通大学,2010.
[15] 刘大刚,陶德敬,王明年.地铁双隧道施工引起地表沉降及变形的随机预测方法[J].岩土力学,2008,29(12):3422-3426.
[16] 韩冬.黄土地层地铁隧道施工引起地表移动及变形预测方法[D].西安:西安科技大学,2011.
[2] 李金奎,王飞飞,白会人.浅埋暗挖地铁隧道施工地表沉降规律分析[J].武汉工程大学学报,2012,34(10):58-61.
[3] 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.
[4] 佘芳涛,王永鑫,张玉.黄土地层地铁暗挖隧道地表纵向沉降规律及其预测分析方法[J].岩土力学,2015(S1):287-292.
[5] Peck R B.Deep excavations and tunnelling in soft ground[C]//Proceeding of the 7th International Conference of Soil Mechanics and Foundation Engineering,Mexico:BALKEMA A A.1969:225-290.
[6] Attewell P B,Woodman J P.Predicting the dynamics of ground settlement and its derivatives caused by tunnelling in soil[J].Ground Engineering,1982,15(8):13-36.
[7] 胡斌,胡启晨,冯晓腊,等.基于灰色理论的地铁隧道沉降预测分析[J].人民长江,2012,43(S1):183-185.
[8] 周志广,冀彦卓.地铁施工引发地面沉降的BP神经网络预测分析[J].地质灾害与环境保护,2014(3):97-102.
[9] 王建秀,邹宝平,陈学军,等.填海区地铁盾构隧道下穿公路施工地层沉降规律的数值模拟[J].中国铁道科学,2013,34(4):33-39.
[10] 苑艺.地面沉降对地铁隧道影响机制的模型试验研究[D].西安:长安大学,2014.
[11] Litwiniszyn J.The theories and model research of movements of ground masses[C]//Proceedings of European Congress Ground Movement,Leeds,UK,1957:203-209.
[12] 阳军生.城市隧道施工引起的地表移动及变形[M].北京:中国铁道出版社,2002.
[13] 韩煊.隧道施工引起地层位移及建筑物变形预测的实用方法研究[D].西安:西安理工大学,2006.
[14] 袁杰.地铁隧道开挖诱发的地表沉降与变形预测分析[D].北京:北京交通大学,2010.
[15] 刘大刚,陶德敬,王明年.地铁双隧道施工引起地表沉降及变形的随机预测方法[J].岩土力学,2008,29(12):3422-3426.
[16] 韩冬.黄土地层地铁隧道施工引起地表移动及变形预测方法[D].西安:西安科技大学,2011.