The Engineering Properities Of Red Sandstone And Bedding Slope Stability On The Highway Of Reixun

Slope stability is a geotechnical problem often encountered in construction projects.Predecessors had done a lot of research on it from theory to engineering practice. However,in practice there still exist some difficult issues to solve, such as non-determinacy, etc.With long-term low intensity, the large amount of red sandstone distributing alone thehighway of RuiXun, is easy to weather and disintegrate. The attitude of rock oftenmanifests a gentle monocline dipping, which makes the rock easy to deform, and with thepoor stability, the rock is very prone to the engineering problems of bedding landslide.Therefore, it is significant to the safety of bedding rock slope engineering to analyze thestability influencing factors and the deformation and failure rules of the red sandstonebedding slope. Basing on the highway project of RuiXun, this paper starts with theresearch on the engineering properties of the red sandstone, analyzes the deformation andfailure mechanism of the bedding slope, evaluates the stability of the bedding slope, andthen proposes preventives measures. The main contents of this paper are as follows:(1) The engineering geological conditions along the highway of RuiXun is described,including the physical and mechanical properties and the swelling characteristics of the redsandstone of southern Jiangxi.(2) Targeting at the bedding landslide that has occurred and the potential along thehighway of RuiXun, I analyzes its slope types and failure mechanisms.(3) Based on the strength theory of limit equilibrium, I analyzes the stability of thebedding slope of red sandstone under different working conditions. Then by usingFLAC3D, I conduct a simulation study on its deformation, displacement and stressdistribution, and prove water being an important factor that affects the bedding slope.(4) According to the geological features of the bedding slope, instability formationmechanism and the result of the stability analysis, following the principles of safety,reasonableness and economy, some suggestions on the treatment of the bedding slope are proposed.