逆断层铰接式隧道衬砌的抗错断效果试验研究
发布时间：2019-01-08 08:55
【摘要】：以棋盘石工程为依托,采用1∶50的相似比,开展模型试验。针对75°倾角逆断层黏滑错动的情况,研究上覆地层的错动变形规律与跨断层隧道的结构受力、损伤特征,并对衬砌结构的破坏模式与破坏机制进行分析。研究表明:随着断层上盘抬升,断裂传播至地表,形成一个倒置的三角剪切带。在2.5D埋深处剪切带的宽度约为0.635D(D为隧道洞径),在隧道拱顶位置处剪切带约为0.315D。地表位移变化与断层传播规律基本一致;断层破碎带处隧道与土体的接触压力的变化最大,是下盘接触压力变化值的3~5倍;断层上盘隧道承受负弯矩,下盘承受正弯矩;在断层破碎带中,错动位移量为0.34D时,衬砌变形缝处发生剪切、挤压引起的开裂,局部伴有张拉裂缝。设置变形缝后,铰接式隧道仅在变形缝处发生严重破坏,节段衬砌损伤轻微,抗错断效果明显优于未设变形缝隧道。
[Abstract]:Based on the chessboard stone project and the 1:50 similarity ratio, the model test was carried out. In view of the viscous slip dislocation of 75 掳inclination reverse fault, the law of dislocation deformation in overlying strata and the structural stress and damage characteristics of cross-fault tunnel are studied, and the failure mode and failure mechanism of lining structure are analyzed. The results show that with the uplift of the upper face of the fault, the fault propagates to the surface, forming an inverted triangular shear zone. The width of shear band at 2.5D depth is about 0.635D (D is tunnel diameter), and the shear band is about 0.315D at the top of tunnel arch. The change of surface displacement is basically consistent with the law of fault propagation, the contact pressure between tunnel and soil in the fault fracture zone is the biggest, which is 3 ~ 5 times of the change value of the contact pressure in the bottom, the tunnel in the upper side of the fault bears negative bending moment, and the lower side bears the positive moment. In the fracture zone, when the dislocation displacement is 0.34D, shearing occurs at the deformed joint of the lining, which is caused by extrusion, and there is a tension crack in the local area. After setting the deformed joint, the hinged tunnel only occurs serious damage at the deformed joint, and the damage of segment lining is slight, and the effect of anti-malfunction is obviously better than that of the tunnel without deformed joint.
【作者单位】： 同济大学土木信息技术教育部工程研究中心;同济大学地下建筑与工程系;上海徐汇滨江开发投资建设有限公司;上海同济建设工程质量检测站;
【基金】：国家自然科学基金资助项目(51478342,51278377)
【分类号】：U451
[Abstract]:Based on the chessboard stone project and the 1:50 similarity ratio, the model test was carried out. In view of the viscous slip dislocation of 75 掳inclination reverse fault, the law of dislocation deformation in overlying strata and the structural stress and damage characteristics of cross-fault tunnel are studied, and the failure mode and failure mechanism of lining structure are analyzed. The results show that with the uplift of the upper face of the fault, the fault propagates to the surface, forming an inverted triangular shear zone. The width of shear band at 2.5D depth is about 0.635D (D is tunnel diameter), and the shear band is about 0.315D at the top of tunnel arch. The change of surface displacement is basically consistent with the law of fault propagation, the contact pressure between tunnel and soil in the fault fracture zone is the biggest, which is 3 ~ 5 times of the change value of the contact pressure in the bottom, the tunnel in the upper side of the fault bears negative bending moment, and the lower side bears the positive moment. In the fracture zone, when the dislocation displacement is 0.34D, shearing occurs at the deformed joint of the lining, which is caused by extrusion, and there is a tension crack in the local area. After setting the deformed joint, the hinged tunnel only occurs serious damage at the deformed joint, and the damage of segment lining is slight, and the effect of anti-malfunction is obviously better than that of the tunnel without deformed joint.
【作者单位】： 同济大学土木信息技术教育部工程研究中心;同济大学地下建筑与工程系;上海徐汇滨江开发投资建设有限公司;上海同济建设工程质量检测站;
【基金】：国家自然科学基金资助项目(51478342,51278377)
【分类号】：U451
【参考文献】
相关期刊论文 前6条
1 冯启民,赵林;跨越断层埋地管道屈曲分析[J];地震工程与工程振动;2001年04期
2 陈红旗,张松林;工程断裂构造及其公路隧道工程效应[J];公路交通科技;2005年S2期
3 赵伯明;刘洋;;断层错动对隧道的影响分析[J];华南地震;2009年01期
4 黄强兵;彭建兵;门玉明;闫金凯;石玉玲;;地裂缝对地铁明挖整体式衬砌隧道影响机制的模型试验研究[J];岩石力学与工程学报;2008年11期
5 熊炜;范文;彭建兵;邓龙胜;闫芙蓉;;正断层活动对公路山岭隧道工程影响的数值分析[J];岩石力学与工程学报;2010年S1期
6 刘学增;王煦霖;林亮伦;;75°倾角正断层黏滑错动对公路隧道影响的模型试验研究[J];岩石力学与工程学报;2013年08期
【共引文献】
相关期刊论文 前10条
1 邓龙胜;范文;彭建兵;闫芙蓉;熊炜;;倾滑断层对公路的致灾机理分析[J];安全与环境学报;2009年03期
2 胡明垎,林均岐,李祚华,申选召;跨越断层埋地管线地震反应研究述评[J];地震工程与工程振动;2005年01期
3 王威;任青文;;活动断裂对深埋隧洞影响的研究概述[J];地震工程与工程振动;2006年01期
4 陈贵清;郝婷s，
本文编号：2404379
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2404379.html
