公路路床常见处理措施

Discussions on the General Treatment of Highway Roadbeds

通过对汽车荷载作用下路床的受力分析,探讨不同的路床处理方法的适用性。设计中常用的处理方法有翻挖晾晒、掺灰处理、换填及深层处理。翻挖晾晒和掺灰处理主要对原土的含水量进行改良,掺灰处理还可以降低土的膨胀性;换填是将路床范围的不良地层超挖,然后分层回填合格的路基填料;深层处理常常将路床及路床以下地基一并处理。良好的路床对路面的稳定性和耐久性起到至关重要的作用,故在设计中应重视路床部位的处理。

According to the load -bearing analysis with the vehicle load, this paper studies different treatments and finds out their applicability. The general treatment of the roadbed in the design works is as bellows ： scarifying and air - dries, mixed ash improvement, replacement and stabilization of the deep subgrade. Scarifying and air - dries method and the mixed ash improvement method mainly optimize the moisture of compacity to improve it, and the ash mixed soil can also reduce the expansibility of the soil. Replacement method is to excavate the unfavorable soil and then backfill qualified filler. The stabilization of the deep subgrade method usually deal with the roadbed and bellowing the roadbed foundation together. A good roadbed play an important role in the stability and durability of road surface, so it should be pay more attention to the roadbed.