水下钻孔灌注桩后注浆承载特性试验研究
摘要:依托武汉市东西湖区某大型工业建筑项目进行水下钻孔灌注桩后注浆承载特性试验。基础设计采用水下钻孔灌注桩桩基,针对不同桩径、不同桩长、相同桩端持力层,分别采取后注浆与不注浆措施进行单桩承载力对比试验,且通过桩身内力测试,揭示了不同工况下桩侧、桩端阻力随桩顶荷载增加的分布规律以及桩端桩侧荷载分担比,为桩基深化设计与施工提供依据。
Abstract:The experiment of post grouting for underwater cast-in-pace bored piles has been constructed based on a large industrial construction project located in the East and West Lake area in Wuhan. Underwater cast-in-pace bored piles is adopted in the foundation design. For different pile diameters, different pile lengths at the same bearing layer of pile tip, the respective experiment of the bearing capacity of single pile is tested by post grouting and non-grouting. By the internal force test of pile body, the distribution law of pile side resistance and pile tip resistance with the increase of the pile top load under different working conditions are revealed, and the pile tip and pile side load sharing ratios are also obtained, which provides reference for the further design and construction of the pile foundation.
中文标题：
水下钻孔灌注桩后注浆承载特性试验研究
Experimental Study on Bearing Characteristics of Post Grouting for Underwater Cast-in-pace Bored Piles
作者：
刘焕存,孙凤玲,刘涛
Liu Huancun,Sun Fengling,Liu Tao
作者简介:刘焕存,男,1962年生,研究员,主要从事岩土工程设计、施工和研究等。E-mail:lhc2421@sina.com
通讯地址：
中航勘察设计研究院有限公司, 北京 100098
AVICInstituteofGeotechnicalEngineeringCo.,Ltd.,Beijing100098,China
中图分类号:TU473.11
doi:10.3969/j.issn.1007-2993.2020.04.013
出版物：岩土工程技术
收稿日期:2019-10-31
网络出版日期:2021-07-06
关键词:水下钻孔灌注桩,后注浆,静载试验,桩身内力,单桩竖向极限承载力
Key words:underwater cast-in-pace bored piles,post grouting,static load test,internal force of pile,ultimate vertical bearing capacity of single pile
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