- 摘 要
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（1 貴州地質(zhì)工程勘察設(shè)計(jì)研究院， 貴陽 550081； 2 貴州省地礦局111地質(zhì)大隊(duì)， 貴陽 550081）
［摘要］巖溶強(qiáng)發(fā)育場地超深大直徑樁基礎(chǔ)施工受地下水、特殊巖土、巖溶洞隙等各種因素的影響，其施工難度極大。結(jié)合實(shí)際工程，在綜合分析場地地質(zhì)條件和現(xiàn)有樁基施工設(shè)備、工藝、方法的基礎(chǔ)上，對超前鉆探、預(yù)注漿處理、成孔質(zhì)量控制技術(shù)進(jìn)行了集成性和系統(tǒng)性研究，提出了巖溶強(qiáng)發(fā)育場地采用預(yù)注漿來解決超深大直徑樁基礎(chǔ)成孔難題的施工技術(shù)，該技術(shù)成功應(yīng)用于實(shí)際工程，對類似工程施工具有指導(dǎo)意義。
［關(guān)鍵詞］巖溶強(qiáng)發(fā)育場地； 預(yù)注漿處理； 沖擊成孔； 施工技術(shù)； 樁基礎(chǔ)
中圖分類號：TU473-1文獻(xiàn)標(biāo)識碼：A文章編號：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
*貴州省地礦局地質(zhì)科研基金項(xiàng)目（黔地礦科合〔2019〕12號）。
作者簡介：程宇，學(xué)士，高級工程師，Email：992963374@qq.com； 通信作者：龍舉，碩士，高級工程師，Email：longju1985@126.com。
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