宁夏喊叫水地区公路膨胀土试验分析与处理

为消除盐兴公路喊叫水段膨胀土路基引发的病害,对沿线膨胀土进行颗粒分析、矿物成分分析、化学成分分析、含盐量试验和膨胀试验,并对该段旧路路面破坏的原因加以分析,提出了相应的处理措施:s入8%生石灰作膨胀土的改良剂,或用砂、砾换填膨胀土。采用后者措施对喊叫水段的膨胀土路基处理后,已运营7年,未再发生病害,效果良好。

Test Analysis and Treatment of Highway Expansive Soil in Ningxia Hanjiaoshui Area

In order to eliminate the disease caused by expansive soil subgrade of Hanjiaoshui Section of Yanxing Road,expansive soil grain,mineral component and chemical composition are analyzed and its salt content and expandability are tested.Through analysis of the causes of old pavement breakage in this section,the corresponding treatment measure is put forward,that is mixing 8% of quicklime into expansive soil as the modifier,or filled with sand or gravel in place of expansive soil.After treated with the latter measure,expansive soil subgrade in Hanjiaoshui Section has been operating for 7 years without any disease,receiving good effect.