路堤下粉喷桩复合地基的工作性能与设计方法

WORKING PROPERTIES AND DESIGNING METHOD OF THE CEMENT INJECTION PILE COMPOUNDED FOUNDATION UNDER THE EMBANKMENT

研讨粉喷桩及粉喷桩复合地基的工作性能与设计方法，包括：桩的工作状态、桩身应力、变形及桩侧摩阻力的分布与变化、桩的强度破坏，临界桩长与加强桩段；路堤下粉喷桩复合地基中校及桩间土的工作特征，桩间土的强度发挥，天然地基土承载力折减系数与桩土应力比；设计途径，设计参数或指标的取值，设计调整的原则与方法，沉降计算等内容。

This paper expounds the working properties and designing method of the cement injection pile-compounded foundation, including the pile working state, the distribution and variation of the pile stress, deformation and drag, the pile strength damage, the critical pile length, the strengthed pile, the working properties of the pile and compounded ground in the cement injection pile-compounded foundation, the strength of the composite ground, the ratio between the reduced factor of the bearing capacity of the natural foundation soil and the stress of the compounded ground, the settlement computing, the designing pathes and parameters or idexes, etc.