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安徽沿江地区广泛分布的新近沉积软土,由于其埋藏厚度大、强度低、变形大、透水性低的工程特性而产生过大的路基沉降和路堤稳定性等工程地质问题,影响公路工程建设的质量和正常使用。本文对池州至安庆高速公路大渡口段软土路基的沉降和路堤稳定性进行了计算和工程地质评价。首先用分层总和法进行总沉降量计算,然后利用单向固结理论进行工后沉降计算。计算结果表明,软土路基工后沉降不能满足设计要求,须对其进行处理; 而填土路堤稳定性分析结果说明该路段路堤稳定。
The newly deposited soft soil widely distributed along the Yangtze River in Anhui Province, due to the engineering characteristics of large thickness, low strength, large deformation and low water permeability, causes excessive geotechnical problems such as roadbed settlement and embankment stability, and affects the construction of highway projects Quality and normal use. In this paper, the settlement and embankment stability of soft soil subgrade at Dadukou section of Chizhou-Anqing Expressway are calculated and evaluated. Firstly, the total settlement is calculated by stratified summation method, and then the post-construction settlement is calculated by using one-way consolidation theory. The calculation results show that the post-construction settlement of soft soil roadbed can not meet the design requirements and must be dealt with. The stability analysis of fill embankment shows that the road embankment is stable.