Reinforcing Technology Of Expansive Soil Cut Slope Instability Mechanism

Shandong expressway is a section of the approval of the State Council of the national highway network in, is also part of the highway network in Shandong Province Planning of highway, a total length of228kilometers, the construction of the highway project is of great significance to promote social and economic development of Shandong province.According to the Shandong province of a design institute and Shandong University School of civil engineering testing center of detailed geological, logging data, the highway expansive soil areas mainly in the K44+460and K44+860sections, total length of about0.4km. Therefore, the expansive soil is the main adverse engineering of the highway geological phenomena. The original design scheme using ordinary clay slope design, construction on the cutting slope, after the rainy season in2010after the expansive soil of typical diseases, Shandong Province in2010the organization of a Design Institute of geology, protection of the professional technology personnel on-site investigation, and made a modification of the corresponding design.20116-8months of the rainy season, according to the design change section of the construction of expansive soil slope are all unstable phenomenon, with the progress of works most slope appear different degree of landslide failure, and even cause serious damage on the subgrade construction. How to take reasonable control measures to ensure the stability of cut slope become difficult problems in the construction of soil subgrade and urgent expansion of the highway. Based on the above reasons, in order to ensure the engineering quality, reduce the bad engineering geological disaster of expansive soil, expansive soil cutting slope suitable slope ratio and protection type, satisfy the engineering quality and highway operation quality requirements, saving investment. Combined with the engineering practice, the engineering geological investigation of landslide slope soil areas along the expansion of the highway, and focus on the3section of slope failure cause collapse by serious analysis of detailed survey. On this basis, combined with laboratory tests of soil, rainfall, moisture, fracture rate, geological structure, the surrounding environment and the impact of human activities such as index, the section of highway expansive soil instability mechanism of slope of expansive soil properties and high speed, and according to the actual construction process, and puts forward has been slumping reinforcement construction process, effective protection of expansive soil cutting slope.