Characteristics And Disaster Of Expansive Soil Engineering Prevention And Control Study

Swelling(rock)soil water absorption expansion softening,water loss shrinkage cracking,its mineral composition with hydrophilic stronger montmorillonite and illite,the strength of the water after the significant decline.Expansive soil is often distributed widely,and railway wiring is difficult to avoid.Damage of railway main show is wet bilge and dry shrinkage deformation of roadbed pavement cracking and flexible pavement smoothness of the mud pumping and reduction,caused by fracture water penetration led to the decrease of the subgrade strength embankment collapse,landslide,longitudinal crack and subsidence,slope collapse of shallow sliding,etc.,and many of these damage form has multiple repetitive characteristic,such as no reworking will cause permanent damage of railway engineering.In this paper,zhang bei-wanquan section of zhangshi expressway is analyzed and studied in this paper.This paper studies the topographic features and stratigraphic distribution characteristics of expansive soil in the region and determines the mineral composition of expansive soil in the region through advanced technology.The physical characteristics of expansive soils in the region such as free expansion rate,specific surface area,dry saturation and water absorption rate were analyzed,and the relationship between these indexes and montmorillonite content was analyzed.The strength characteristics of expansive rocks in the area are analyzed and the strength parameters are proposed by combining with the anti-calculation indexes.In specification,on the basis of analyzing the determination of swelling rock in the region of the atmosphere influence depth,in combination with the actual situation of cutting slope analysis shows that the depth is appropriate,accords with the practice of the region.The expansion characteristics of expansive rock in this region are studied,including the relationship between expansion force and expansion deformation and the content of montmorillonite.The geological hazard characteristics of expansive rock in this area are studied,and the common slope failure is analyzed,and the natural slope analogy method is adopted for the first time to stabilize the slope.It is better to combine the above research results and put forward the method and design scheme of the expansion rock area of the system,and put forward the matters needing attention.