山东省五莲县膨胀土分布特征及处理措施分析

Distributions and Mitigations of Expansive Soils in Wulian County,Shandong Province

膨胀土(expansivesoil)属于失水收缩,吸水膨胀的高塑性粘土,如果处理不当,较容易出现事故,其危害早已引起我国专家的高度重视。我国的膨胀土分布广泛,是世界分布面积最大的国家之一。居住于膨胀土分布区的人口达3亿之多,膨胀土给居民带来的地质灾害问题也不在少数;天然状态下膨胀土多呈灰黑色、黄褐色或灰色,潮湿状态下多呈黄色或灰黑色,具光泽。通常情况下膨胀土多处于坚硬或硬塑的状态,强度相对较高,将住宅建于膨胀土分布区之上其后果可想而知。对五莲县的膨胀土的危害进行分析,力求保证当地人们群众的生命财产安全。

The expansive soil is one of the problematic soils in the geotechnical engineering since it is a high plasticity soil and the volume will be contracted when the moisture in the soil is lost,whereas,when it absorbs the moisture,the volume of the expansive soil will increase.China is the largest country with the widest expansive soil distributions.There are 300 million populations who live within the expansive soil terrains and the expansive soil induced geo-hazards are frequently encountered.Under the natural moisture content state,the color of the expansive soils are usually gray black,yellowish brown or gray.Under this state,the compressive strength of the expansive soils are usually high.When they absorb water,their color turns into yellow,gray black with shinny luster.If a low-raised residential building is constructed on the expansive soils without treatment,the adverse consequence is most like to occur.This paper presents the distribution and evaluation results of expansive soils in Wulian County,Shandong Province.