摘要
结合黄土山区某高速公路路基沉陷病害,对引起黄土路基沉陷的原因进行了分析研究,认为主要是受连续暴雨影响,雨水沿着各种裂隙、节理入渗黄土路基内部,且该路段填挖交界处填方不密实、原地基湿软含水量较大,存在粉土与粉质黏土滑动面造成路基滑移沉陷;提出了采取桩板式挡土墙对原挡土墙进行加固处治,并对已沉陷路基开挖卸载后,采取高压旋喷桩处治,与原路基填土形成复合地基,提高路基承载力,同时对该段排水系统进行修复完善,进一步保证了黄土路基的稳定与安全。
Combined with the settlement disease of a highway subgrade in loess mountainous area, this paper analyzed and studied the causes of loess sugrade settlement. It put forward the pile plate retaining wall that adopted to reinforce and treat the original retaining wall. After the excavation and unloading of the subsided subgrade, it also took the high pressure jet grouting pile treatment to form composite foundation with the original subgrade soil, which improved the bearing capacity of subgrade. At the same time, it also repaired and perfected the drainage system, which further ensured the stability and safety of the loess subgrade.
出处
《山西交通科技》
2017年第5期21-23,共3页
Shanxi Science & Technology of Transportation
关键词
黄土地区
路基沉陷
分析
处治
loess area
subgrade settlement
analysis
treatment
