加筋膨胀土路堤稳定性数值模拟研究

引入含水率,建立了非饱和土的强度和应力-含水率-应变关系；在考虑土工格栅与填土间的相互作用、膨胀土吸水膨胀、软化特性等因素的基础上,提出了土工格栅加筋路堤稳定性的数值计算新方法,算例分析表明了该方法的合理性.在加筋膨胀土路堤的稳定性计算中引入工程中易于确定的含水率,避开了复杂的非饱和土理论体系,通过相关参数随含水率的变...

Numerical Simulation of the Stability of Expansive Soils Embankment Reinforced by Geogrid

Strength and stress-moisture content-strain relationship of unsaturated soil is established by introduction of moisture content.With the consideration of some key factors,such as the interaction between geogrids and expansive soil,expansion which is caused by absorbing water and softening characteristics,a new stability calculation method is proposed to calculate the stability of expansive soils embankment reinforced by geogrid.A case study shows that the approach is reasonable.Moisture ratio which can be easily gained in geotechnical engineering is introduced into the calculation approach of stability for expansive soil embankment reinforced by geogrid,which avoids the complex theoretical system of unsaturated soil.The characteristics of slope and unsaturated soil are indirectly realized by the relationship that kinds of soil property parameters vary synchronously with moisture content.Therefore,the proposed method is an effective way to realize practical engineering purpose of theoretical achievements of unsaturated soil.