沈阳地区砂土碎石土层抗拔桩承载力的试验研究
摘要:通过沈阳砂土地区旋挖成孔抗拔桩的现场静载试验、钢筋应力测试等试验,研究单桩抗拔承载能力、侧摩阻力的分布规律,得出以下结论:按地层年代划分土层确定侧摩阻力比按岩性名称划分更为合理;压浆前、后增强段侧阻力增强系数约在1.15~1.62之间;扩径支盘现象可以使局部摩阻力发挥较大,但也限制了其下部一定桩长范围内摩阻力的发挥。
Abstract:Through static load test, inforcement stress tests and other tests on uplift pile in Shenyang sand area, study the uplift pile bearing capacity and lateral friction, and get the following conclusions:according to the soil division by stratigraphic to determine the lateral friction is more reasonable than the soil division by lithology; before and after grouting, the lateral friction enhancement factor is about 1.15 to 1.62 in the enhanced part; the effect of branches and plates can partly improve the lateral friction, but also limit the lower lateral friction in certain length range of the pile.
中文标题:
沈阳地区砂土碎石土层抗拔桩承载力的试验研究
Experimental Study on Uplift Pile Bearing Capacity in Shenyang Sand Gravel-Clay
作者:
张全升1,刘琦2,刘忠昌2
Zhang Quansheng1,Liu Qi2,Liu Zhongchang2
作者简介:张全升,1962年生,男,汉族,辽宁瓦房店人,大学本科,高级工程师,主要从事岩土工程勘察、设计及施工工作。E-mail:370824423@qq.com
通讯地址:
1. 吉林省建苑设计集团有限公司, 吉林长春 130011; 2. 辽宁省建筑设计研究院岩土工程公司, 辽宁沈阳 110005
1.JilinProvinceJianYuanDevsignGroupCo.,Ltd,Changchun130011,Jilin,China; 2.LiaoningProvinceBuildingDesignResearchInstituteGeotechnicalEngineeringCompany,Shenyang110005,Liaoning,China
中图分类号:TU473.11
doi:10.3969/j.issn.1007-2993.2014.05.011
出版物:岩土工程技术
收稿日期:2014-02-25
网络出版日期:2021-07-19
关键词:砂土碎石土层,抗拔桩,承载力,后压浆,支盘效应
Key words:sand gravel-clay,uplift pile,bearing capacity,post-grouting,branches and plates effect
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