基于Mindlin解的劲性砂桩芯桩轴力分布规律研究  

A Study on Core Pile Axial Stress Regularity of Concrete-Cored Sand-Gravel Pile Based on Mindlin Displacement Solution

作　　者：王海[1] 穆康[2] 陈荣淋[2] 戚志博[2] 俞缙[2] 

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075 [2]华侨大学岩土工程研究所,厦门市361021

出　　处：《公路》2012年第8期7-11,共5页Highway

基　　金：国家自然科学基金项目;项目编号51109084;福建省自然科学基金项目;项目编号2011J01317;泉州市科技计划项目;项目编号2010Z81

摘　　要：劲性砂桩是一种新型复合材料桩。基于弹性半无限空间的Mindlin位移解及复合材料力学原理,对劲性砂桩中混凝土芯桩轴向应力分布进行理论分析研究,得到劲性砂石桩芯桩轴力分布函数,讨论了不同荷载、混凝土芯桩标号、砂土弹性模量情况下芯桩轴向应力分布规律,并与现场芯桩轴向应力测试结果进行对比分析。研究表明:该理论分析结果与现场试验所显示的规律基本一致,验证了理论研究的合理性。该研究对于了解劲性砂桩的荷载传递规律和工作机制具有一定的理论价值。Concrete-cored sand-gravel pile is a new and typical composite material pile. Theoretical a- nalysis of core pile axial stress are carried out based on Mindlin displacement solution in elastic semi-infi- nite body and composite material mechanics. Regularities of distribution of core pile axial stress under dif- ferent axial loads, grade of concret and elastic modulus of sandy soil are deduced, theoretical results are compared with field test results. The comparison results show that theoretical analysis results are accor- dant with field test results and they can be verified each other. Theoretical study has significant value for analysis of performance mechanism of concrete-cored sand-gravel pile.

关 键 词：劲性砂桩 芯桩 MINDLIN位移解 轴向应力 

分 类 号：TU472.3[建筑科学—结构工程]