桩端硬持力层冲切安全性评价及在红层中的运用
摘要:针对嵌岩桩桩端硬持力层厚度小于3d的实际情况,为确保安全又节省造价,在分析桩-岩土体系的荷载传递机理和岩石破坏模式的基础上,建立桩端硬持力层的冲切承载力计算公式,用该公式计算桩端硬持力层厚度的冲切承载力,并与桩基设计荷载相除得到安全系数K,根据安全系数K的大小判定桩端硬持力层的厚度能否满足荷载要求。工程实例表明,该方法在红层地区的运用效果好,可供借鉴。
Abstract:For hard rock-socketed pile tip bearing layer thickness less than 3 times actually, in order to ensure safe and cost savings, base on the analysis of pile-rock and soil system load transfer mechanism and failure mode of rock, we establish the punching capacity formula of pile tip hard-bearing stratum, then use the formula to calculate pile-end hard-bearing stratum anticutting capacity,and it was divided by the pile design load to obtain the of safety K, using the safety factor K to determine whether pile bearing stratum thickness can meet the load requirements. Project examples show: the method in the apply of the red layer region is good and reference.
中文标题:
桩端硬持力层冲切安全性评价及在红层中的运用
Punching-cutting Safety Evaluation in the Pile Tip Hard-bearing and Application in the Red Beds
作者:
罗照华,姜中笑
Luo Zhaohua,Jiang Zhongxiao
作者简介:罗照华,1961年生,男,汉族,江西南康人,高级工程师,长期从事水文地质和岩土工程的生产研究工作。E-mail:lzh2230l@163.com
通讯地址:
湖南省地质工程勘察院, 湖南株洲 412003
ExplorationInstituteofGeologicalEngineeringofHunanProvince,Zhuzhou412003,Hunan,China
中图分类号:TU473.12
doi:10.3969/j.issn.1007-2993.2009.06.008
出版物:岩土工程技术
收稿日期:2009-07-13
关键词:嵌岩桩,桩端硬持力层厚度,冲切安全性评价,红层中运用
Key words:rock-socketed piles,pile-tip hard-bearing stratum thickness,punching safety evaluation,application in the red beds
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