潜孔冲击高压旋喷复合管桩技术(DJP工法)及其在大湾区地基加固中的应用  

Down-the-hole Percussion High Pressure Jet Grouting Pile Technique(DJP Technique)and It’s Application in Foundation Reinforcement of Complex Layers in Greater Bay Area

作　　者：潘飞超 程子龙 刘厚朴 戴斌 包小华[2] 陈湘生[2] PAN Feichao;CHENG Zilong;LIU Houpu;DAI Bin;BAO Xiaohua;CHEN Xiangsheng(China Railway Construction Investment Group Co.,Ltd.Shenzhen 518054,China;College of Civil and Transportation Engineering,Shenzhen University Shenzhen 518060,China;Beijing Rongchuang Geotechnical Engineering Co.,Ltd.Beijing 100085,China)

机构地区：[1]中铁南方投资集团有限公司,深圳518054 [2]深圳大学土木与交通工程学院,深圳518060 [3]北京荣创岩土工程股份有限公司,北京100085

出　　处：《广东土木与建筑》2022年第5期64-69,共6页Guangdong Architecture Civil Engineering

基　　金：国家自然科学基金(52022060&52090084);深圳市科技创新项目(JCYJ20190808112203700)。

摘　　要：针对大湾区复杂地质条件,常规的地基处理方法存在水泥浆液流失成桩效果差、不易成桩且成桩强度低和施工空间不足成桩深度不够等问题。依托深圳市妈湾跨海通道项目提出在潜孔冲击高压旋喷管桩基础方案,将旋扩法相结合进行一次成孔成桩。施工采用超长送桩,加入RC-1-1添加剂,借助高精度北斗导航桩身定位以及物联网监控,使该工法灵活应用于大湾区的复杂地层,让地基加固得到保障。对技术在临海地区复杂地层中应用的效果和效益进行总结分析,结果显示该工法不仅具有广泛且灵活的应用范围,同时保障了地基加固的效果,获得了巨大的经济效益和社会效益,技术可为同类地基处理提供参考。In view of the complex geological conditions of the Greater Bay Area,the conventional foundation treatment methods have some problems,such as poor effect of cement slurry loss,low pile strength and insufficient construction space and pile depth.Based on shenzhen Mawan Cross-sea channel project,puts forward a plan of percussive high-pressure rotary nozzle pile foundation in the latent hole,and combines the rotary expansion method to form holes and piles in one time.The construction adopts super-long pile feeding,adding RC-1-1 additive,with the help of high-precision Beidou navigation pile positioning and Internet of things monitoring,so that the construction method can be flexibly applied to the complex strata of the Greater Bay Area,and the foundation reinforcement can be guaranteed.The results show that this method not only has a wide and flexible application range,but also ensures the effect of foundation reinforcement,and the economic and social benefits also produce huge benefits.This technology can provide reference for similar foundation treatment.

关 键 词：地基处理 潜孔冲击高压旋喷桩 复杂地层 施工技术 

分 类 号：O152.1[理学—数学]