中文摘要：

研究目的：针对高速铁路沉降要求精度高、工后沉降控制严格的特点,研究红黏土地基的沉降特性,通过对比分析得到较为实用的红黏土地基沉降计算方法及其沉降修正系数。研究结论：对武广高速铁路红粘土地基采用ES法、e～lg p法、三向应力法、割线模量法、现场试验法进行沉降计算,研究表明：几种理论计算方法基本上随外荷载的增加呈线性变化,但外荷载越大,理论值偏离越大。分层总和计算的沉降量值较其他方法最接近实测值,三向应力法、割线模量法偏离得较大。根据实测沉降量分别进行修正,修正后的曲线中,ES法的修正曲线比较接近实测值。

英文摘要：

Research purposes：Considering high requirement and strict control on post-construction settlement of high-speed railway,settlement properties of red clay foundation was studied.Furthermore,proper settlement calculation method and corresponding modification coefficient was obtained after comparative analysis. Research conclusions：Red clay foundation settlement was calculated by ES method,e~lg p method,3D stress method,secant modulus method and field test method,by which following conclusions could be drawn：settlement obtained from theoretical methods varied linearly with load increasing,however,significant deviation appeared with heavy load.Calculated settlement by layer-wise summation method was closest to measured value,while 3D stress method and secant modulus lead to a significantly larger settlement.Based on measured settlement,all calculations were modified in which ES method resulted in a closer curve.