您现在的位置:建筑结构>> 期 刊>> 2020年>> 第17期>>正文内容
岩溶强发育场地超深大直径桩基础施工技术研究*
程宇1,2,文秀1,2,曹聚凤1,2,龙举1
摘 要

(1 贵州地质工程勘察设计研究院, 贵阳 550081;  2 贵州省地矿局111地质大队, 贵阳 550081)

[摘要]岩溶强发育场地超深大直径桩基础施工受地下水、特殊岩土、岩溶洞隙等各种因素的影响,其施工难度极大。结合实际工程,在综合分析场地地质条件和现有桩基施工设备、工艺、方法的基础上,对超前钻探、预注浆处理、成孔质量控制技术进行了集成性和系统性研究,提出了岩溶强发育场地采用预注浆来解决超深大直径桩基础成孔难题的施工技术,该技术成功应用于实际工程,对类似工程施工具有指导意义。

[关键词]岩溶强发育场地;  预注浆处理;  冲击成孔;  施工技术; 桩基础

中图分类号:TU473-1文献标识码:A文章编号:1002-848X(2020)17-0126-06

 

Study on construction technology of super deep and large diameter pile foundation in well-developed karst terrain

CHENG Yu1,2, WEN Xiu1,2, CAO Jufeng1,2, LONG Ju1

(1 Guizhou Geological Engineering Survey and Design Institute, Guiyang 550081, China; 2 The 111 Geological Brigade of Guizhou Geology and Mineral Bureau, Guiyang 550081, China)

Abstract:The construction of super deep and large diameter pile foundation in well-developed karst terrain is affected by various factors such as groundwater, special rock and soil, karst cavity and so on, the construction of the pile foundation is extremely difficult. Combined with practical project, based on the comprehensive analysis of the geological conditions of the site and the existing pile foundation construction equipment, technology and method, the integrated and systematic research was carried out on the advanced drilling, pre-grouting treatment and hole forming quality control technology. The construction technology of pre-grouting treatment was put forward  to solve the hole forming problem of super deep and large diameter pile foundation in well-developed karst terrain site. The technology has been successfully applied to practical engineering, which has guiding significance for similar engineering construction.

Keywords:well-developed karst terrain; pre-grouting treatment; percussive drilling; construction technology; pile foundation

 

*贵州省地矿局地质科研基金项目(黔地矿科合〔2019〕12号)。

 

作者简介:程宇,学士,高级工程师,Email:992963374@qq.com;  通信作者:龙举,硕士,高级工程师,Email:longju1985@126.com。

下载地址

    你还没注册?或者没有登录?这篇论文要求至少是本站的注册会员才能阅读!

    如果你还没注册,请赶紧点此注册吧!

    如果你已经注册但还没登录,请赶紧点此登录吧!