摘要
在可能发生岩溶塌陷的地区,不能采用一般常规的施工工艺直接进行桩基施工,需采取有效的施工措施以保证安全和质量。从沙漏型岩溶塌陷的成因和机理出发,结合工程实例,总结岩溶塌陷前的预处理措施和岩溶塌陷后塌陷区桩基施工的技术措施。主要研究内容包括施工前通过有效的勘察手段查明岩溶分布情况,采取注浆方式进行预处理;塌陷发生后为防止再次塌陷导致桩基施工时发生事故,搭设所需钢平台,并总结全回转全套工艺施工技术要点。
Conventional pile foundation construction technology cannot be used in karst collapse area,and effective construc-tion measures should be taken to ensure safety and quality.Based on the causes and mechanism of hourglass karst collapse,the pre-treatment measures before karst collapse and technical measures for pile foundation construction after karst collapse were summarizes combining with engineering examples.The distribution of karst was found out through effective investigation means before construc-tion,and grouting method was adopted for pretreatment.After the collapse,in order to prevent the accident during pile foundation con-struction caused by the secondary collapse,the required steel platform was erected.The key points of full rotation and full set of con-struction technology are introduced.
作者
刘笔艳
Liu Biyan(Wuhan Surveying-geotechnical Research Institute Co.,Ltd.of MCC,Wuhan 430080,Hubei,China)
出处
《岩土工程技术》
2021年第5期327-331,共5页
Geotechnical Engineering Technique
关键词
沙漏型岩溶
塌陷
钻孔灌注桩
施工技术
hourglass karst
collapse area
bored pile
construction technique
