嵌岩桩极限侧阻力研究  

Study on Ultimate Resistance of Rock-socket Pile

作　　者：雷孝章[1] 何思明[2] 

机构地区：[1]四川大学高速水力学国家重点实验室,四川成都610065 [2]中国科学院成都山地灾害与环境研究所,成都四川610041

出　　处：《四川大学学报（工程科学版）》2005年第4期7-10,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(90202007);国家重点基础研究发展计划资助项目(2003CB415202-3)

摘　　要：根据嵌岩灌注桩中嵌岩段的受力特点,推导了嵌岩段的法向应力计算公式,以此为基础,采用Hoek Brown准则研究了嵌岩段的极限侧阻力计算问题,讨论了各因素对极限侧阻力的影响。结果表明:嵌岩段极限侧阻力随单桩轴力增大而增大;嵌岩段极限侧阻力与岩体质量等级有关;嵌岩段极限侧阻力与嵌岩桩相对刚度呈正相关关系。Based on the characteristics of rock-socket pile, the normal stress calculation formula of rock-socket section is given. On basis of the formula, the ultimate resistance of rock-socket section is studied using Hoek-Brown criterion and the effect on resistance of correlation factors is discussed. The results show that ultimate resistance of rock-socket pile increase with axial load and it＇s related to quality of rock mass as well as to relative stiffness of rock-socket pile.

关 键 词：嵌岩桩 桩侧阻力 HOEK-BROWN准则 受力特点 应力计算 极限侧阻力 

分 类 号：TV553[水利工程—水利水电工程]