Study On Engineering Properties Of Expansive Soil Of Hefei To Anqing High Speed Railway

Expansive soil is a special kind of rock which has great harm to engineering. For a long time, it is a difficult problem that can not be solved completely in the engineering construction, if not handled properly will bring huge economic losses. Belong to the engineering hot topic at home and abroadNew combined Ann high-speed railway passing through expansive soil are widely distributed in the jianghuai region, in each section of the line area, hefei-FeiXi distributed small-strong expansive soil, LuJiang-a small amount of weak expansive soil, anqing section distribution for the expansive soil in segmentation and other area. Some common removal of other natural material, due to the particularity of its structure and composition, the engineering properties of expansive soil also has some of the more important. These features, will seriously affect the engineering design and construction of expansion shrinkage and crack resistance, overconsolidation, such as without treatment directly for filling subgrade, or not when, can bring considerable harm to the subgrade stability, or bring error of engineering treatment scheme, make the engineering measures to be conservative and wasteful. New Ann nine high-speed railway hefei-anqing section belongs to high standard construction of passenger rail project, is very different compared with the ordinary railway, the greatest characteristic of this kind of high speed railway and requirements as follows: high speed, comfort, high security and high traffic density. The unique engineering properties of expansive soil will cause great potential to high-speed rail.This paper introduces the current situation of the expansive soil research at home and abroad, The classification and engineering properties of expansive soils along the high speed railway are studied in depth, and by means of mathematical statistics, the important physical and mechanical properties and mineral composition were summarized and analyzed, The differences and trends of the basic properties of expansive soil in each section of the line are shown visually, the regression analysis method was adopted to the experimental data obtained has carried on the correlation analysis, emphasis on the lines in the expansive soil by experiment means three engineering properties were studied. Combination of both lines and engineering survey, analyzed the combined Ann expansive soil of the new railway high-speed railway subgrade. The engineering Suggestions are presented.