Study On The Influence Of The Roof Slope Anti-slide Pile On The Operating Tunnel

With the rapid development of China's western region construction,more and more roads extend to the mountains.In practical engineering,a variety of structures are built in a corridor with the needs of the route and the actual project.Such structures overlap and interact at different elevations.For example,in the same corridor,the highway passes through the ridge through the tunnel,and the two grade highway increases the elevation along the line.If there is a landslide in the course of construction of the two grade highway,it is necessary to adopt the anti-slide pile to control,and the embedded depth of anti-slide pile should be controlled well.In order to ensure the stability of the landslide and tunnel,reasonable embedding section is very important.And the influence scope of the embedded section is also the content of the research.The embedded depth of anti-slide piles and its influence range have not been mature engineering experience.It is of great engineering significance to study the influence of anti-slide piles on the design of multi story structures.In this paper,it is based on the landslide engineering of S203 highway reconstruction project in Guizhou province.Through the combination of theoretical analysis and simulation analysis,it is aim to study the influence of the roof slope anti-slide piles on the operating tunnel research.Specific results are as follows:(1)This paper introduces the basic situation of the landslide engineering in the reconstruction and extension project of S203 Shiqian Banqiao to Lenglong highway in Guizhou province.It analyzes the mechanism and calculation of landslide and anti-slide piles.It also introduces the pressure of tunnel surrounding rock.(2)It analyses the stability of the roof slope anti-slide piles and the distribution of internal force of anti-slide piles in landslide treatment.And the safety and feasibility of practical construction are demonstrated.(3)The relationship between the effect of the embedded anti-slide piles on roof slope and the embedded depth is studied.The results show that,in a certain range,with the other parameters unchanged,the influence of the embedded section of the anti-slide piles increases with the increase of the embedded depth.(4)The relationship between the effect of the embedded anti-slide piles on roof slope and geotechnical properties is studied.Geotechnical property is replaced by the compressive strength of rock and soil.The results show that,in a certain range,in the case of other parameters unchanged,when the embedded section of the formation is stable,with the increase of the compressive strength of rock and soil,the influence range of the anti-slide piles embedding section is not changed.(5)The relationship between the effect of the embedded anti-slide piles on roof slope and the tunnel size is studied.The research results show that in a certain range,when the other parameters unchanged,with the increase of the radius of circular tunnel roof arch width,the embedded section influence range of the anti-slide piles also increases.(6)According to the relationship between the influence of the anti-slide piles embedded section and the embedded depth,soil properties and size of the tunnel,by mathematical software,the relationship between the influence of the embedding section and the variables is approximately fitted.And a definition of safety distance which is from the bottom of anti-slide piles on roof slope to the top of the tunnel surrounding rock is given.