The Stability Assessment Of Landslide And Prophylactico-therapeutic Measures In The Han Xikou Bridge Xingshan County

Pipeline engineering is a comprehensive engineering.It applied many kinds of modern science and technology.The scale of project is very large.It is considered as a large,comprehensive industrial project by the world.To make thousands of kilometers pipeline system operating continuously in a long term,efficient and safe way under unstable conditions,the quality of the pipeline engineering must meet the requirements of design and specification.Before construction,the geological environment of the working area should be stable.If the construction area is in the unstable zone,we must make a scalability of stability and some measures should be taken to guarantee its stability.Landslide in Hanxikou Bridge,Xingshan County is located near the area of the gas pipeline project of the Zhong Wu gas pipeline.Iit constitutes a certain threat to the construction of the pipeline project.The development characteristics and stability of Landslide in Hanxikou Bridge were studied in this paper according to the field survey,geological drilling and test data,aiming at the landslide.The following conclusions are obtained:(1)According to the detailed analysis of survey data in Hanxikou landslide,this paper expounds landslide spatial distribution pattern,material composition and deformation characteristics.It analyses that the landslide genetic mechanism is a loose fracture of landslide body: it is easily softened in water,the strength is decreased,and the whole instability sliding along the soft surface is easy to occur,it is a kind of soil landslide of pushing type.(2)Adopt Morgenstern-Price method,using Geo-Studio software calculated and analyzed the stability of Hanxikou bridge landslide in the natural and rainstorm conditions.calculation shows that,under natural conditions,Hanxikou bridge landslide is stable;in heavy rain conditions,Hanxikou bridge landslide is unstable under owe stable state,its evaluation the landslide stability field macro judgment results.(3)Through analysis on Hanxiikou bridge landslide stability,study on the influence of various factors on the stability of the landslide and the research of common landslide treatment scheme,after a comprehensive analysis of multiple solutions and multiple aspects,the use of the "cut slope minus load and drainage ditch and retaining wall" program for prevention and control is recommended.