Stability Appraisal And Reinforcement Research Of Xiajia River Landslide In Mian-Ning Freeway

Along with our country national economy vigorously development, the freeway entered the mountainous area ,the mountainous area freeway construction are more and more many, this will bring fills in, deep cuts the roadbed high also to increase. Therefore, judges the side slope stability correctly, causes the engineering construction to conform to the security, the reasonable principle is extremely important.The Xiajia river landslide is located in the right K30+ 830 ~ K31 + 000 road sections of Mian-Ning freeway, the terrain is complex and is attributed to the low mountain physiognomy. The cumuli layers,remnant layers and diluvium clay of Q4, slimy sandstone of Cambrian are revealed, the slope is large-scale soil landslide. In the article the GLE method and the Swedish method, Simplified Bishop method, the Slippery wedge method, the Spencer method and so on has carried on the comprehensive elaboration, it is also introduced that simplified methods affect the caculational precition. In addition, the landslide stability analysis with stress -strain analysis theory and the method are introduced.In the article the soil landslide characteristic, intensity characteristic and rock & soil parameters are disserted by Xiajia river landslide. Using unbalanced thrust transmission method and Slope/W module in the software GeoStudio, appraised the landslide stability which is the critical steady state, carried on the stress -strain analysis with software ANSYS 8.0 to indicate the movement tendency was obvious on the landslide interface, on the computation with FLAC2D to the landslide to obtain the Fos is 0.95, also reflect the landslide actually stability condition. The reasions cause the landslide destruction that are excavating in slope feet and raining.Considering Xiajia River is the character of huge soil landslide and big residul sliding force, have selected anti-slide pile, gravity retaining wall and drained ditch to reinforce the landslide. And calculate what's the necessary of the selected reinforce methods, the results accorded with criterions and the designs are rational. Finally the items which should pay attention in the reinforcement construction process have carried on the brief elaboration to this landslide.This article proposed the landslide stability assessment method and the landslide reinforcement technology are useful of the similar landslide.