不均匀块石填土层深基坑止水帷幕工程技术分析  

Technical analysis of water stop curtain of deep foundation pit in uneven rock fill layer

作　　者：孔秋平 KONG Qiuping(Geotechnical and Environmental Enterprise Engineering Technology Research Center of Fujian province,Longyan 364000;Fujian YonKing Geotechnical Co.,Ltd,Longyan 364000)

机构地区：[1]福建省岩土与环境企业工程技术研究中心,福建龙岩364000 [2]福建永强岩土股份有限公司,福建龙岩364000

出　　处：《福建建筑》2022年第11期69-71,77,共4页Fujian Architecture & Construction

摘　　要：基坑止水帷幕是基坑工程重要环节之一,其安全、稳定性直接影响基坑及周边的安全。在实际基坑工程中,往往因为地质条件、设计方案等因素,导致止水帷幕的失效,进而影响整个工程的安全及工期。结合实际工程,探讨在严重不均匀块石填土下卧基岩地质中,如何采用长螺旋潜孔钻机引孔结合局部黏土置换方法,以及运用双重高压旋喷桩止水帷幕,确保止水效果。The water stop curtain of the foundation pit is one of the important links of the foundation pit project, and its safety and stability directly affect the safety of the foundation pit and its surrounding areas. In the actual foundation pit engineering, the failure of the water stop curtain is often caused by geological conditions, design schemes and other factors, thus affecting the safety and duration of the entire project. Combined with the actual project, this paper discusses how to use the method of long spiral down the hole drilling machine combined with local clay replacement, and how to use the double high-pressure jet grouting pile water stop curtain to ensure the water stop effect in the bedrock geology under the seriously uneven block rock fill.

关 键 词：块石填土 基岩 长螺旋潜孔锤引孔 黏土置换 双重管高压旋喷桩 

分 类 号：TU47[建筑科学—结构工程]