土地整治工程中排洪沟软弱地基处理方案比选

Comparison and selection of treatment schemes for soft foundation of flood drainage ditch in land consolidation project

为实现对排洪沟软弱地基的高效经济化处理,本文以阳湾沟土地整治项目排洪渠地基处理工程为例,开展了处治方案的比选工作,提出铺设竹架板方法,测定原状土土力学基本参数,选取合适的本构模型,利用ABAQUS大型有限元软件对排洪渠铺设竹架板法进行数值模拟,分析其沉降变形特性。研究结果表明:利用在排洪渠底部铺设竹架板的方法提升软土地基承载力,在土地整治项目配套工程中是有效的,且比换填、抛石挤淤等常规的地基处理方法更加经济,可为今后实施的土地整治项目提供经验借鉴。

In order to achieve efficient and economical treatment of soft foundation of flood drainage ditch,this paper carries out comparative selection of treatments with Yangwangou land consolidation project as an example and the method of laying bamboo scaffolding plate is carried forward.The basic parameters of undisturbed soil mechanics are determined and appropriate constitutive model is selected,and the method of laying bamboo scaffolding plate for flood drainage ditch is counted by using ABAQUS large-scale finite element software.The settlement and deformation characteristics are analyzed by numerical simulation.Research results show that,it is effective to increase the bearing capacity of soft soil foundation by laying bamboo slab at the bottom of flood drainage canal,and it is more economical than other conventional foundation treatment methods such as replacement,riprap and silt extrusion,which can provide experience for future land Consolidation projects.