膨胀土路基含水量在不同气候条件下的变化规律模型试验研究

EXPERIMENTAL STUDY ON MOISTURE CONTENT IN EXPANSIVE SOIL ROADBED UNDER DIFFERENT WEATHER CONDITIONS

针对广西南友公路宁明地段中等膨胀土和湖南常张公路慈利地段弱膨胀土,通过六组膨胀土路基室内模型试验,在不同排水边界和不同压实条件下,分别模拟路基在积水、阴天、日照、降雨时,膨胀土路基中含水量的变化规律、水的入渗和蒸发速度等,这对膨胀土路基的设计和施工具有重要的理论和工程实际意义。

With six tests of expansive soils for the roadbeds, which come from Ningming section of Nanning-- Youyiguan Highway in Guangxi Autonomous Region, and Cili section of Changde--Zhangjiajie Highway in Hunan Province, respectively, are analyzed under different weather conditions such as dewatering, overcast, sunshine and precipitation. The different dewatering boundaries, the densities of roadbed, the accumulated water contents are considered for the roadbed. The moisture contents variation, water permeation and evaporation in the expansive soils roadbed are also researched. The achieved results can provide some useful references for the design and construction of expansive soils roadbed.