PHC管桩在大型水闸厚层软弱土地基处理中的应用  

Application of PHC Piles to Thick Soft Soil Foundation Treatment in Large Sluices

作　　者：孟范兵 MENG Fanbing(Anhui Water Resources and Hydropower Survey,Design and Research Co.,Ltd.,Hefei 230088,China)

机构地区：[1]安徽省水利水电勘测设计研究总院股份有限公司,合肥230088

出　　处：《广东水利水电》2025年第3期77-84,共8页Guangdong Water Resources and Hydropower

摘　　要：以寿西湖退洪闸厚层软弱土采用PHC管桩复合地基处理为工程案例,对PHC管桩桩径、桩长和布置进行了理论计算以满足复合地基承载力和沉降控制要求;创新地采用塑性砼作为PHC管桩复合地基中的褥垫层,不弱化天然地基防渗能力,保证了闸基渗透稳定和管桩复合地基桩土联合作用,提高了复合地基整体作用和抗变形能力;通过工程安全运行和管桩复合地基质量检测,表明桩身结构完整,沉降和承载力满足设计要求,地基处理效果好。PHC管桩复合地基处理技术可应用于大中型泵站、水闸等水工建筑物厚层软土地基处理,能有效解决厚层软土地基承载力、沉降和水平变形控制及渗透稳定问题,又能加快施工进度、缩短工期、节省施工成本,该地基处理方式具有明显的技术和经济优势,推广应用前景广阔。Taking the treatment of thick soft soil in Shouxi Lake flood Sluice by PHC pipe pile composite foundation as an engineering case,the pile length,pile diameter and arrangement are determined by theoretical calculation from two aspects of composite foundation bearing capacity and settlement control.The plastic concrete cushion is innovatively adopted between the bottom plate and the pile,so that the pile-soil joint action of the composite foundation is enhanced,the integral action and the anti-deformation capacity of the composite foundation are improved,and the anti-seepage stability of the sluice foundation is ensured;Through the quality detection of the pile composite foundation and the safe operation of the project,it shows that the pile structure is complete,the bearing capacity meets the design requirements,and the effect of the composite foundation is very good.The treatment technology of PHC pile composite foundation can be applied to the treatment of thick soft soil foundation of hydraulic structures such as large and medium-sized pumping stations and sluices,which can effectively solve the problems of bearing capacity,settlement and horizontal deformation control and seepage stability,speed up the construction progress,shorten the construction period and save the construction cost.This foundation treatment method has obvious technical and economic advantages,and has wide popularization and application prospect.

关 键 词：PHC管桩复合地基 塑性砼褥垫层 厚层软弱土地基处理 

分 类 号：TU473.1[建筑科学—结构工程]