浅埋小净距偏压隧道施工工序的数值分析
|
摘要
采用双侧壁导坑法,对浅埋小净距双洞六车道偏压公路隧道在不同开挖顺序下进行施工力学数值模拟。分析不同开挖顺序时的围岩位移、应力、地表位移以及塑性区的变化,并进行比较。数值结果表明:先开挖深埋一侧隧道,围岩塑性区较小,左洞拱顶不会出现围岩拉裂区,右洞拱顶塑性区较小;先开挖各洞外侧,拱顶和中间岩柱的应力、位移较小;后行隧道开挖对先行隧道围岩的受力变形有很大影响,后行隧道开挖导致先行隧道洞周位移和应力大幅度增大;中间岩柱、侧墙和拱顶均是施工中应重点关注的部位。
The numerical simulation of construction sequence was studied for shallow embedded bias tunnels with small clear distance using the method of double side excavation.The change of plastic zone,displacement and stress of surrounding rock were analyzed and compared for different excavating sequences.The results show that when the deep tunnel is excavated earlier than the shallow one,the plastic zone is smaller and on the crown of left tunnel there will not appear tensile failure.The displacement and stress of crown and middle rock pillar are smaller if tunnel’s lateral is excavated before tunnel’s inside.It has an important effect on the antecedence tunnel and results in displacement and stress increase when the later tunnel is excavated.The middle rock pillar,lateral wall and the tunnel crown are key places that must be noticed.
The numerical simulation of construction sequence was studied for shallow embedded bias tunnels with small clear distance using the method of double side excavation.The change of plastic zone,displacement and stress of surrounding rock were analyzed and compared for different excavating sequences.The results show that when the deep tunnel is excavated earlier than the shallow one,the plastic zone is smaller and on the crown of left tunnel there will not appear tensile failure.The displacement and stress of crown and middle rock pillar are smaller if tunnel’s lateral is excavated before tunnel’s inside.It has an important effect on the antecedence tunnel and results in displacement and stress increase when the later tunnel is excavated.The middle rock pillar,lateral wall and the tunnel crown are key places that must be noticed.
引文
[1]姚勇,田志宇.并设小净距隧道中岩墙力学特征及加固措施研究[J].工业建筑,2006,36(4):57-60.YAO Yong,TIAN Zhi-yu.Study on mechanical behavior and reinforcing measures of middle rock wall of parallel tunnel with small interval[J].Industrial Construction,2006,36(4):57-60.
[2]李云鹏,王芝银,韩常领.不同围岩类别小间距隧道施工过程模拟研究[J].岩土力学,2006,27(1):11-16.LI Yun-peng,WANG Zhi-yin,HAN Chang-ling.Simulating study on construction process of tunnels with small spacing for difference classes of surrounding rocks[J].Rock and Soil Mechanics,2006,27(1):11-16.
[3]李云鹏,王芝银,韩常领.考虑地震影响的小间距隧道围岩流变损伤[J].长安大学学报:自然科学版,2006,26(2):51-56.LI Yun-peng,WANG Zhi-yin,HAN Chang-ling.Rheologic damage and earthquake influence on surrounding rock of small spacing tunnels[J].Journal of Changan University:Natural Science Edition,2006,26(2):51-56.
[4]王明年,李志业,关宝树.3孔小间距浅埋暗挖隧道地表沉降控制技术研究[J].岩土力学,2002,23(6):821-824.WANG Ming-nian,LI Zhi-ye,GUANG Bao-shu.Research on controlling measures for ground surface settlement of three little distance parallel shallow embedded tunnels[J].Rock and Soil Mechanics,2002,23(6):821-824.
[5]王明年,李志业,刘智成.软弱围岩3孔小间距平行浅埋隧道施工力学研究[J].铁道建筑技术,2002(4):11-14.WANG Ming-nian,LI Zhi-ye,LIU Zhi-cheng.A study on construction mechanics of three parallel shallow tunnels with small spacing in weak surrounding rock[J].Railway Construction Technology,2002(4):11-14.
[6]姚勇,晏启祥,周俐俐.小净距隧道在不同开挖方式下的力学效应分析[J].西南科技大学学报,2005,20(2):53-56.YAO Yong,Yan Qi-xiang,ZHOU Li-li.Study on mechanics effect of small-distance tunnels located at soft ground[J].Journal of Southwest University of Science and Technology,2005,20(2):53-56.
[7]姚勇,何川,晏启祥.董家山隧道小净距段爆破控制的数值模拟[J].岩土力学,2004,25(Suppl.2):501-506.YAO Yong,HE Chuan,YAN Qi-xiang.Numerical simulation of blasting control for small clear distance zone of Dongjiashan tunnel[J].Rock and Soil Mechanics,2004,25(Suppl.2):501-506.
[8]晏启祥,何川,姚勇.小净距隧道施工小导管注浆效果的数值模拟分析[J].岩土力学,2004,25(Suppl.2):239-242.YAN Qi-xiang,HE Chuan,YAO Yong.Numerical simulation analysis of little tremie grouting effect while construction of going into portal at small-distance tunnel[J].Rock and Soil Mechanics,2004,25(Suppl.2):239-242.
[9]晏启祥,何川,姚勇.软岩隧道施工特性及其动态力学行为研究[J].岩石力学与工程学报,2006,25(3):572-577.YAN Qi-xiang,HE Chuan,YAO Yong.Study on construction characteristic and dynamic behavior of soft rock tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(3):572-577.
[10]晏启祥,何川,姚勇.软岩小净距隧道施工力学效应研究[J].地下空间与工程学报,2005,1(5):693-697.YAN Qi-xiang,HE Chuan,YAO Yong.Study on mechanical effect of small-distance tunnels located at soft ground[J].Chinese Journal of Underground Space and Entineering,2005,1(5):693-697.
[11]靳晓光,刘伟,郑学贵.小净距偏压公路隧道开挖顺序优化[J].公路交通科技,2005,22(8):61-64.JIN Xiao-guang,LIU Wei,ZHENG Xue-gui.Optimization of excavating sequence for closely spaced bias double-tube tunnels[J].Journal of Highway and Transportation Research and Development,2005,22(8):61-64.
[12]刘伟,靳晓光,陈少华.高速公路小净距隧道合理净距的探讨[J].地下空间,2004,24(3):380-385.LIU Wei,JIN Xiao-guang,CHEN Shao-hua.Investigation on reasonable clear interval of small-interval tunnel for the freeway[J].Underground Space,2004,24(3):380-385.
[13]刘艳青,钟世航,卢汝绥.小净距并行隧道力学状态的试验研究[J].岩石力学与工程学报,2000,19(9):590-594.LIU Yan-qing,ZHONG Shi-hang,LU Ru-sui.Experimental study on mechanical characteristics of twin tunnels with small spacing[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(9):590-594.
[14]杨小礼,张丙强,王志斌.浅埋大跨度连拱隧道地震反应分析[J].中南大学学报:自然科学版,2006,37(5):991-996.YANG Xiao-li,ZHANG Bing-qiang,WANG Zhi-bin.Earthquake response of large span and double-arch shallow tunnel[J].Journal of Central South University:Science and Technology,2006,37(5):991-996.
[15]杨小礼,李亮,刘宝琛.偏压隧道结构稳定性评价的信息优化分析[J].岩石力学与工程学报,2002,21(4):484-488.YANG Xiao-li,LI Liang,LIU Bao-chen.Evaluation on structure stability of asymmetrically loaded tunnels using the theory of information optimization analysis[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(4):484-488.
[16]JDG D70—2004,公路隧道设计规范[S].JDG D70—2004,Code for design of road tunnel[S].
[2]李云鹏,王芝银,韩常领.不同围岩类别小间距隧道施工过程模拟研究[J].岩土力学,2006,27(1):11-16.LI Yun-peng,WANG Zhi-yin,HAN Chang-ling.Simulating study on construction process of tunnels with small spacing for difference classes of surrounding rocks[J].Rock and Soil Mechanics,2006,27(1):11-16.
[3]李云鹏,王芝银,韩常领.考虑地震影响的小间距隧道围岩流变损伤[J].长安大学学报:自然科学版,2006,26(2):51-56.LI Yun-peng,WANG Zhi-yin,HAN Chang-ling.Rheologic damage and earthquake influence on surrounding rock of small spacing tunnels[J].Journal of Changan University:Natural Science Edition,2006,26(2):51-56.
[4]王明年,李志业,关宝树.3孔小间距浅埋暗挖隧道地表沉降控制技术研究[J].岩土力学,2002,23(6):821-824.WANG Ming-nian,LI Zhi-ye,GUANG Bao-shu.Research on controlling measures for ground surface settlement of three little distance parallel shallow embedded tunnels[J].Rock and Soil Mechanics,2002,23(6):821-824.
[5]王明年,李志业,刘智成.软弱围岩3孔小间距平行浅埋隧道施工力学研究[J].铁道建筑技术,2002(4):11-14.WANG Ming-nian,LI Zhi-ye,LIU Zhi-cheng.A study on construction mechanics of three parallel shallow tunnels with small spacing in weak surrounding rock[J].Railway Construction Technology,2002(4):11-14.
[6]姚勇,晏启祥,周俐俐.小净距隧道在不同开挖方式下的力学效应分析[J].西南科技大学学报,2005,20(2):53-56.YAO Yong,Yan Qi-xiang,ZHOU Li-li.Study on mechanics effect of small-distance tunnels located at soft ground[J].Journal of Southwest University of Science and Technology,2005,20(2):53-56.
[7]姚勇,何川,晏启祥.董家山隧道小净距段爆破控制的数值模拟[J].岩土力学,2004,25(Suppl.2):501-506.YAO Yong,HE Chuan,YAN Qi-xiang.Numerical simulation of blasting control for small clear distance zone of Dongjiashan tunnel[J].Rock and Soil Mechanics,2004,25(Suppl.2):501-506.
[8]晏启祥,何川,姚勇.小净距隧道施工小导管注浆效果的数值模拟分析[J].岩土力学,2004,25(Suppl.2):239-242.YAN Qi-xiang,HE Chuan,YAO Yong.Numerical simulation analysis of little tremie grouting effect while construction of going into portal at small-distance tunnel[J].Rock and Soil Mechanics,2004,25(Suppl.2):239-242.
[9]晏启祥,何川,姚勇.软岩隧道施工特性及其动态力学行为研究[J].岩石力学与工程学报,2006,25(3):572-577.YAN Qi-xiang,HE Chuan,YAO Yong.Study on construction characteristic and dynamic behavior of soft rock tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(3):572-577.
[10]晏启祥,何川,姚勇.软岩小净距隧道施工力学效应研究[J].地下空间与工程学报,2005,1(5):693-697.YAN Qi-xiang,HE Chuan,YAO Yong.Study on mechanical effect of small-distance tunnels located at soft ground[J].Chinese Journal of Underground Space and Entineering,2005,1(5):693-697.
[11]靳晓光,刘伟,郑学贵.小净距偏压公路隧道开挖顺序优化[J].公路交通科技,2005,22(8):61-64.JIN Xiao-guang,LIU Wei,ZHENG Xue-gui.Optimization of excavating sequence for closely spaced bias double-tube tunnels[J].Journal of Highway and Transportation Research and Development,2005,22(8):61-64.
[12]刘伟,靳晓光,陈少华.高速公路小净距隧道合理净距的探讨[J].地下空间,2004,24(3):380-385.LIU Wei,JIN Xiao-guang,CHEN Shao-hua.Investigation on reasonable clear interval of small-interval tunnel for the freeway[J].Underground Space,2004,24(3):380-385.
[13]刘艳青,钟世航,卢汝绥.小净距并行隧道力学状态的试验研究[J].岩石力学与工程学报,2000,19(9):590-594.LIU Yan-qing,ZHONG Shi-hang,LU Ru-sui.Experimental study on mechanical characteristics of twin tunnels with small spacing[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(9):590-594.
[14]杨小礼,张丙强,王志斌.浅埋大跨度连拱隧道地震反应分析[J].中南大学学报:自然科学版,2006,37(5):991-996.YANG Xiao-li,ZHANG Bing-qiang,WANG Zhi-bin.Earthquake response of large span and double-arch shallow tunnel[J].Journal of Central South University:Science and Technology,2006,37(5):991-996.
[15]杨小礼,李亮,刘宝琛.偏压隧道结构稳定性评价的信息优化分析[J].岩石力学与工程学报,2002,21(4):484-488.YANG Xiao-li,LI Liang,LIU Bao-chen.Evaluation on structure stability of asymmetrically loaded tunnels using the theory of information optimization analysis[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(4):484-488.
[16]JDG D70—2004,公路隧道设计规范[S].JDG D70—2004,Code for design of road tunnel[S].
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心