高速公路路基膨胀土改性处理的实验研究

膨胀土工程地质性质很差,在被用作高等级公路的路基填料时,要进行改性处理.通过对一种典型膨胀土物理力学性质的研究及掺加石灰进行改性处理试验,得出了不同掺灰量、不同含水量及不同压实度对膨胀土性能的影响规律.在采用掺灰土填筑路基时,最好在大于最佳含水量的条件下压实,并且在可压实的情况下尽可能提高压实含水量及压实度,这样可大大减少路基的膨胀量及膨胀力.

A Study on the Experimental of Modified Treatment on the Expansive Soil for Expressway Bed

The properties of expansive soil have to be modified before it is used as fillings of expressway bed due to its poor engineering quality. The influence tendency by different content of lime, water and compacting degree can be found based on the physical and chemical property research of a typical expansive soil and modified treatment. The bed should be impacted under the condition of optimum water content when it is built using expansive soil mixed lime. Water content and compacting degree should be raised as large as possible so expansibility and expansion quantity can be reduced greatly.