期刊论文

中文

现代隧道技术

1009-6582

2015

52

6

126-134

10.13807/j.cnki.mtt.2015.06.019

湖北省自然科学基金重点项目（NO.2013CFA110） 合肥工业大学宣城校区博士产学研启动专项资助基金（NO.XC2015JZBZ21）.

本校为其他机构

文章针对田家山隧道明挖段堆积体失稳滑塌问题,采用FLAC~(3D)软件建立了三维仿真模型,并结合现场地表监测点的实测数据,首先从堆积体塑性区分布、位移增量以及锚杆轴力分布等情况,对隧道明挖段开挖支护的全过程进行了复核分析。结果表明:大里程方向导向墙开裂滑塌是由于剪切屈服单元与拉伸屈服单元贯通形成塑性滑层,从而导致浅层牵引式滑塌;小里程方向大变形是由于堆积体内部向隧道临空区移动,导致地表出现拉伸型裂缝,进而表现为蠕滑拉裂。然后对比分析了加固前后隧道上覆堆积体及围岩的变形特征,并优化了隧道开挖的工法、工序。最后根据数值复核结论以及国内外的工程经验,提出了综合加固处理措...

Focusing on the slide collapse of the open-cut section of the Tianjiashan Tunnel, the finite difference method FLAC3D was adopted to establish a 3D simulation model. Based on the measured on-site data, the whole process of excavation and support of the open-cut section was reviewed and analyzed in terms of the plastic zone distribution, displacement increments and distribution of the anchor bolt axial forces. Results indicate that the cracking and collapse of the guide wall at exit section are attributed to a plastic sliding layer induced by the through connection of shear yield elements and t...