高压旋喷桩复合土钉墙Plaxis有限元分析

Plaxis Finite Elements Analysis on Supporting Structure with High-pressure Jet Grouting Pile and Composite Soil-nailing Wall

摘要:

根据高压旋喷桩复合土钉墙研究现状，提出了有限元数值分析软件Plaxis8.2选择理由，论述了土体本构模型选择原则，支护结构材料模型选择原则，参数取值原则，分步计算过程原则。重点给出了高压旋喷桩、土钉、砼面层相关参数的计算公式。通过代表性的示例研究了高压旋喷桩贡献作用规律。最后通过基坑支护实例，介绍了该程序在高压旋喷桩复合土钉墙设计方面的应用和验证情况。

Abstract:

According to the research status of supporting structure with high-pressure jet grouting pile and composite soil-nailing wall, the paper put forward the selection reason of finite element numerical analysis software Plaxis8.2; discussed selection principle for soil constitutive model and supporting structure material model, and principle for parameter values and step-by-step calculation process. The calculation formula of related parameters for high-pressure jet grouting pile, soil nail and concrete surface layer were mainly given. The paper also studied contribution function of high-pressure jet grouting pile based on representative case example, and introduced application and verification of the above procedure in the design of high-pressure jet grouting pile and composite soil-nailing wall by an engineering case of shopping mall excavation.