排水固结法弹塑性固结沉降机理及应用

Mechanism and Application of Elastic-Plastic Consolidation Settlement in Drainage Consolidation

软粘土一般是天然含水量大、压缩性高、承载力低和抗剪强度很低的呈软塑~流塑状态的粘性土,因为软粘土的这个特性决定了软土路堤的沉降和应力变化将会受到软土特性、分布特点、分布厚度及应力历史等诸多复杂因素的影响。根据广乐高速公路樟市至花东段T19合同段的软基路堤地段排水固结法加固处理实际工程,根据弹塑性机理分析该段软基的固结沉降,研究其固结机理并且将固结过程中的水土耦合作用考虑进来,可为今后类似的工程提供理论及应用借鉴。

Soft clay is a kind of cohesive soil（in soft plastic^flow plastic state） with high natural water content,high compressibility,low bearing capacity and low shear strength.This characteristic determines that the settlement and stress of soft soil embankment will be affected by soft soil characteristics,distribution characteristics,distribution thickness,stress history and many other complex factors.According to the actual construction of the soft foundation embankment drainage consolidation of Contract No.T19 of Zhangshi-Huadong Section of Guangle Expressway,the soft foundation consolidation settlement has been analyzed by elastic-plastic mechanism,and the consolidation mechanism has been fully studied while the soil and water coupling factor during the consolidation process has been considered in detail,which could provide some theoretical and practical references for similar projects in the future.