复合土钉支护的有限元分析

复合土钉支护是从土钉墙的基础上发展起来的,它在一定程度上克服了土钉墙的缺点,是一种应用更加广泛的基坑支护新技术。通过建立有限元模型模拟了水泥土桩复合土钉墙的分步开挖与支护的过程,比较了复合土钉支护与土钉支护在土体位移、地表沉降、基底隆起及超挖引起的破坏形态的不同,研究了复合土钉支护的作用机理。结果表明:复合土钉支护能够充分调动周围土体共同作用,更加有效的控制了基坑变形,其支护效果明显优于一般的土钉支护。

Finite Element Analysis of Composite Soil Nailing

Composite soil nailing, which has been developed on the basis of nailing and gotten ride of the disadvantages , is a new retaining technique for excavation. The process of the staged excavation and retaining of composite soil nailing were simulated by founding a finite element model. The difference between composite soil nailing and basis of nailing in soil displacements , land subsidence, bottom rebound deformations and failure configurations were studied and the working principles of composite soil nailing were analyzed. The results show that surrounding soil will act on the composite system to control the deformations more effectively; and the behaviors of composite soil nailing are superior to that of soil nailing.