Study On The Treatmeat Technology Of Expansive Soil Highway Landslide In South Shaanxi Area

The expansive soil is a special clay soil possessing some features of strong swelling and shrinkage,over-consolidation,more fissures and strengh-decaying.It is wide distributed in our country,and expansive soil landslide is the most common destroyed modality of expansive soil slope.Along with the large-scale construction of highway and fast development of the western part of China, it is important to study on the treatment of expansive soil landslide in the districts of the expansive soil.The paper was based on the engineering of Xiao-kang hihgway and Xi-Han highway,aoocrding to the experiments and inspections of the expansive soil along the hihgway,the ingredients and engineering characters are analyzed,the appropriate identification and classification of this district are brought forward.By the means of reconnaissance on expansive soil landslide,the mechanism,characteristics,conditions of formation and developpment are analyzed.Based on expansive soil landslide of Zhengjiawan in Xiao-kang highway which was cured with anti-slide pile,the mechanism of action of anti-slide pile are analyzed. Adopting limiting equilibrium theory and transport coefficient method,1andslide pushing force and residual anti-slide force before pile are calculated.During the calculation of anti-slide pile with cantilever pile calculating method,anti-slide pile is separated into load-bearing section and anchoring section.This article illuminates acquiring approach of calculating parameters,calculating method and steps,and summarizes concrete noticed matters of construction. Based on expansive soil landslide of Xiao-kang highway,putting forward integrated treatmeat technique with"Geocell,Cement-lime-soil pile and Anti-slide pile", summarizing technics and noticed matters of construction.By means of monitoring of anti-slide pile and deep-seated displacement of the slide,the whole monitoring system of expansive soil slide is created, and the trearmeat effects of slide are syntheticaly analyzed and appraised.