地震工程学报2017，Vol.39Issue(2)：213-220,8.DOI:10.3969/j.issn.1000-0844.2017.02.0213
降雨对无支挡结构下隧道-滑坡正交体系的作用机理研究
Research on the Influence Mechanism of Rainfall for the Tunnel-Landslide Orthogonal Systerm Without the Supporting Structure
摘要
Abstract
Rainfall is one of the important factors that induce landslide sliding and landslide stability.At present,the research on the influence of rainfall on the tunnel landslide orthogonal system without the supporting structure is still lacking.In order to study the action mechanism of rainfall on the tunnel landslide orthogonal system under different intensity of rainfall,and study the characteristics of slope deformation and the stress characteristics of the tunnel without the supporting structure,the influence mechanism of rainfall for the Tunnel-Landslide Orthogonal system by large geological mechanics simulation model test is researched.With the four different stages of rainfall,the changing characteristics of longitudinal of tunnel and the variation characteristics of circumferential stress of tunnel with different cross sections,and the changing characteristics of the displacement of the sliding body at different locations and different cross sections also are analyzed.The results show that:(1) The rain can lead to the cross-sectional of slope broke,and form a new glide plane which result in the landslide slipped.(2) With the increasing of water content of sand,the strain of tunnel has obviously sudden changed,and the longitudinal strain of tunnel near the mountain is bigger than the longitudinal strain of tunnel near the river.(3)Rainfall makes stress of the tunnel uneven change;And the stress of tunnel bottom is greater than the stress of the top,the stress near the mountain is larger than the stress near the river under the tunnel landslide orthogonal system,and shows that necessary drainage measures are indispensable.And it is indicated that the rainfall can cause the movement of the sliding body,cause the uneven stress and deformation of the tunnel,which is very unfavorable to the safety of the tunnel structure.This experiment can provide some reference for the landslide and tunnel anti slide design in the abundant water area.关键词
隧道/滑坡/降雨/模型试验/应力/应变Key words
tunnel/landslide/rainfall/model test/stress/strain分类
交通工程引用本文复制引用
艾挥,吴红刚,陈小云..降雨对无支挡结构下隧道-滑坡正交体系的作用机理研究[J].地震工程学报,2017,39(2):213-220,8.基金项目
铁道部科技研究开发计划重点课题(2010G018-C-3-1) （2010G018-C-3-1）
中铁科研院(科研)字2017-KJ008-Z008-XB （科研）
甘肃省交通建设科研项目(200813) （200813）
中国中铁股份公司科技开发计划(20160202) （20160202）
