自钻式锚杆技术在皖南山区某场地深基坑支护中的应用  

Analysis of self-drilling anchor technique in deep foundation pit support of a site in the mountainous area of southern Anhui Province

作　　者：吴洪富 WU Hongfu(The Tunxi Geological Survey of East China Metallurgical Geological Prospecting Bureau,Huangshan 245000,Anhui,China)

机构地区：[1]华东冶金地质勘查局屯溪地质调查所,安徽黄山245000

出　　处：《资源信息与工程》2023年第4期79-82,共4页Resource Information and Engineering

摘　　要：本文以自钻式锚杆技术在皖南山区某场地一级深基坑支护中的应用为例,介绍了自钻式锚杆的组成结构、施工工艺。经锚杆与基坑变形监测可知,自钻式锚杆抗拔承载能力比普通锚杆提高了约15%,基坑安全性达到设计要求;从成本控制和进度控制方面对普通锚杆与自钻式钻杆进行了比较,认为该项目采用自钻式锚杆成本仅增加了约15%,而工期可缩短约30%。自钻式锚杆技术不仅能用于碎石土层及严格控制变形场地的深基坑支护,还能大幅度缩短施工周期,具有推广应用的价值。This paper took the application of self-drilling anchor technique in the first level deep foundation pit support of a site in the mountainous area of southern Anhui Province as an example,and introduced in detail the composition structure and construction process of self-drilling anchor.Through the anchor monitoring and pit deformation monitoring,the self-drilling anchors had about 15%higher pullout capacity than ordinary anchors,while the safety of the pit met the design requirements.In addition,common anchor and self-drilling anchor were compared in terms of cost control and schedule control.It is believed that the cost of the project using self-drilling anchors only increased by about 15%,while the construction period could be reduced by about 30%.The self-drilling anchor rod technique can not only solve the deep foundation pit support in sites such as gravel soil layer or strict deformation control,but also can significantly shorten the construction period,which has benefits for promotion and application.

关 键 词：自钻式锚杆 深基坑支护 中空锚固体系 施工周期 皖南山区 

分 类 号：P642[天文地球—工程地质学]