钢护筒与混凝土桩水平受力机理数值分析与模型验证  

Numerical analysis and model validation of load-bearing mechanism between steel tube and concrete combined pile

作　　者：李坚平 王多银[1,2] 汪承志[1,2] 

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]国家内河航道整治工程技术研究,重庆400074

出　　处：《水运工程》2016年第5期125-131,共7页Port & Waterway Engineering

基　　金：国家科技支撑计划(2011BAB09B01);国家自然科学基金(51579021);国家青年科学基金(51209242)

摘　　要：大直径钢护筒与钢筋混凝土水平受力桩基由于桩身刚度不连续,导致桩基与基岩结合部、钢护筒与基岩结构部出现较复杂的应力状态,需要提出科学评判依据来确定这类桩基的有效嵌固深度。建立考虑钢护筒与混凝土桩水平受力的室内物理模型和数值模型,通过大量变动参数的数值模拟和对比测试研究,探讨研究影响钢护筒与混凝土桩水平承载性能的各种因素,得到钢护筒与桩基共同作用下地基基础的力学性状规律。The discontinuous stiffness of large-diameter steel tube and concrete combined pile leads to the complicated stress state at the joint part of the pile foundation and the base rock, the steel casing and the bedrock structure.So, it is needed to put forward a scientific basis to determine the pile foundation ＇s effective depth of embedment.Establishing the physical model and the numerical model of single pile with large-diameter steel tube and reinforced concrete combined force, we carry out numerical simulation and contrast test of a large number of variable parameters to probe into various factors affecting the lateral bearing capacity of the embedded piles and obtain the mechanical properties of the foundation under the action of the steel tube and the pile foundation.

关 键 词：钢护筒 桩基 受力机理 数值分析 模型验证 

分 类 号：U655.544.1[交通运输工程—港口、海岸及近海工程]