South Friends Of The Highway Fractured Unsaturated Expansive Soil Slope Monitoring And Stability Analysis

Based on the investigation and study analysis of domestic and foreign expansive soil cutting slopes, in view of the problem of the Nan-You highway expansive soil, obtained from the expansive soil main project characteristics , through carries on the detailed geological prospecting and the monitor to the road massive landslides, discussion the rules of expansive soil landslide characteristic and the main reasons of influence side slope stability, and attempts to propose method that can use to the overall stability analysis of the expansive soil cutting slopes in Nan-You highway, and carries on the analysis and the appraisal to it. This paper put forwarded the effective synthesis preventing and controlling measures of the expansive soil cutting slopes, in order to provides the scientific instruction to the smooth construction of the highway. The main research work is as follows:1,Discussion to the unsaturated soils suction and the soil-water characteristics, narrated the unsaturated soils stress state variable and the shearing strength expression, the detailed analysis expansive soil intensity characteristic and the influence factors, discussed the standard of the expansive soil shearing strength value.2,Carry on qualitative and the quota analysis of the dehiscence question to expansive soil, has studied expansive soil crevasse in the atmospheric camp strength and outside factor under and so on how load functions develops the change, and attempts to look for the effective crevasse observation method, seeks the appropriate crevasse measurement.3,Described the landslide experiment induce by rain in the project scene, observed has rained into infiltrates to the soil body interior temperature, the earth pressure, the water content and the distortion influence.4,The establishment considered the crevasse and the geological tectonic level inclination angle collapses along the level side slope slides the computation model, and carries on the side slope stable checking calculation. 5,To the geogrid, the root pile + retaining wall handling expansive soil cutting slope preventing and controlling plan has carried on the FLAC numerical analysis.