红层软岩高路堤计算模型参数选取及工后沉降控制技术

Selection of Calculation Model Parameters for Red-bed Soft Rock High Embankment and Post-Construction Settlement Control Technology

滇中红层软岩遇水易崩解、膨胀,具有长期蠕变特性,而作为路堤填料易引起路堤病害。以云南楚姚高速路堤工程为实例,通过广泛调研相关文献,提出一套适用于滇中地区的红层软岩参数,对高路堤病害的防治提出相应的控制优化措施。首先通过对滇中及其他区域的相关红层软岩填料工程特性及相应参数进行对比,选取部分数据进行数据拟合,得到楚姚公路填方路堤中红层软岩填料的级配、工程特性及相关参数。然后对滇中红层高路堤进行病害分析,最后针对红层软岩高填方路堤施工和运营期间的风险提出对应的控制措施。

The red-bed soft rock in central Yunnan is easy to disintegrate and swell in contact with water,and has long-term creep characteristics. As the embankment filler,it is easy to cause embankment diseases.This paper takes Yunnan Chuyao Expressway embankment project as an example,through extensive investigation of related literature,proposes a set of red-bed soft rock parameters suitable for central Yunnan,and puts forward corresponding control optimization measures for the prevention and treatment of high embankment diseases. Firstly,by comparing the engineering characteristics and corresponding parameters of relevant red-bed soft rock fillers in central Yunnan and other areas,some data are selected for data fitting,and the gradation,engineering characteristics,and related parameters of the red-bed soft rock filler in the fill embankment of Chuyao Highway are obtained. Then,the disease analysis of the red-bed high embankment in central Yunnan is carried out,and finally,corresponding control measures are proposed for the risks during the construction and operation of the red-bed soft rock high-fill embankment.