基于损伤原理的搅拌桩复合地基加固区变形分析

对搅拌桩复合地基加固区在柔性荷载作用下的性状进行了分析,将复合地基的沉降分为加固区的压缩变形和下卧层的压缩变形,加固区的压缩变形又分为桩体的压缩变形和加固区桩间土的压缩变形.从受力平衡的角度出发,将加固区的受力状态分为桩体和桩间土的受力平衡,并引入损伤理论将其与传统的计算方法相耦合,建立了以加固区桩体损伤变形为主要因素之一的加固区压缩变形计算模式,并用实例验证了该模型的可靠性.

Analysis of reinforced area with mixed pile by using damage principle

The behavior of stable layer in composite foundation enforced by mixed pile group under flexible load was analyzed.In view of force equilibrium,the status of force action in stable layer was divided into force balance of the pile and that of the soil around the pile.There would be elastic deformation,plastic deformation,and damage deformation in the compressed pile in the composite foundation.By so doing,the damage factor was introduced into the traditional mechanical calculation and a new calculational mode of compression deformation of the stable layer was set up,where the damage deformation of the pile in the composite foundation was taken as one of the major factor.