塑料排水板-强夯联合加固法在软基处理中的应用

Application of Combined Reinforcement Method by Plastic Draining Board-Dynamic Compaction in Soft Soil Foundation

该文以福州港可门作业区4#、5#泊位工程作为研究对象,将塑料排水板-强夯联合加固法应用于软基处理工程。为验证处治效果,对软土地基展开了现场监测分析,监测项目包括地表沉降和孔隙水压力。基于Terzaghi-Randulic固结本构理论,建立了塑料排水板-强夯联合加固的ABAQUS有限元计算模型。将有限元理论计算结果与现场实践监测结果进行对比,结果显示理论计算沉降接近实际监测值。在验证了ABAQUS有限元计算的适用性后,通过该方法设计不同排水板间距、不同排水板长度的正交计算工况,分别计算不同工况的固结度大小,以此评价最优加固效果,为工程实际提供依据。

In this paper,taking the No. 4 and No. 5 berth engineerings in Kemen operating area in Fuzhou as the research objects. The combined reinforcement method by plastic draining board-dynamic compaction is applied to the soft foundation treatment engineering. In order to verify the treatment effect,the site monitoring analysis of soft soil foundation is carried out. The monitoring items includes the surface subsidence and pore water pressure. Based on the Terzaghi-Randulic consolidation constitutive theory,the ABAQUS finite element calculation model of combined reinforcement of plastic draining board-dynamic compaction is established. The calculated results by finite element method are compared with the results by field practice. The results show that the theoretical settlement is close to the actual measured value. After verifying the applicability of ABAQUS finite element method,this method is used to calculate the orthogonal calculation condition of plastic draining board with different spacing and different draining length. The consolidation degree under different working conditions is calculated respectively. This is used to evaluate the optimum reinforcement effect,and it provides basis for engineering practice.