工程桩桩端下伏溶洞钻孔注浆加固施工技术  

CONSTRUCTION TECHNOLOGY OF DRILLING AND GROUTING REINFORCEMENT FOR UNDERLYING KARST CAVES AT THE END OF ENGINEERING PILE

作　　者：关伟 赵鹏凯 班程远 Guan-Wei;Zhao Peng-kai;Ban Cheng-yuan

机构地区：[1]中建二局第二建筑工程有限公司,深圳518000

出　　处：《建筑技术开发》2023年第9期26-28,共3页Building Technology Development

摘　　要：灌注桩在遇到溶洞时需要对溶洞进行特殊处理,但超灌混凝土无法保证工期要求,同时对工程桩施工成本造成较大影响,单根工程桩混凝土超灌数量不可预估,工程桩施工成本不可控制。通过使用注水泥浆法处理桩端溶洞,可先于工程桩施工前完成溶洞处理,也可在工程桩施工完成后进行处理,可降低施工成本,节约工期,同时提升工程桩安全性,实现灌注桩在遇到溶洞时安全快速施工。When encountering karst caves,cast-in-place piles need to undergo special treatment.The traditional treatment method is to overfill concrete,but overfill concrete cannot meet the construction period requirements of engineering piles,and it also has a significant impact on the construction cost of engineering piles.The quantity of over?ll concrete for a single engineering pile is unpredictable,and the construction cost of engineering piles cannot be controlled.This article uses the cement slurry method to treat the karst cave at the pile end,which can be completed before or after the construction of the engineering pile.This can reduce construction costs,save time,and improve the safety of the engineering pile,achieving safe and rapid construction of the cast-in-place pile when encountering karst caves.

关 键 词：灌注桩 溶洞 注浆加固 钻孔抽芯 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]