CM复合地基技术在特殊地质条件下的应用  

Application of CM composite foundation technology in special geological condition

作　　者：赵苏北 徐勇华 徐新宇[1] 方静波 

机构地区：[1]南京华森建筑工程设计顾问有限公司,南京210005 [2]南京雨桩建筑科技公司,南京210012

出　　处：《建筑结构》2013年第S2期666-670,共5页Building Structure

摘　　要：对于深厚杂填土(松散,空隙率较大,且含有大量块石和老设备基础)的地质条件,采用压密注浆处理,可以提高杂填土的密实性和桩间土的承载力特征值,采用素混凝土树根桩作为CM复合地基的增强体,既提高了复合地基的承载力,又能有效地减小基础的沉降。通过工程实例介绍了CM复合地基的设计、计算方法,提出了根据变刚度调平的原则布置复合地基增强体以及复合地基增强体持力层选用强风化岩的设计思路。As for the geological condition of deep miscellaneous fill(loose,bigger voidage and containing a large number of block stone and old equipment foundation), using pressure grouting secret can improve the compactness of miscellaneous fill and the characteristic value of bearing capacity of inter pile soil and using plain concrete root pile as CM composite foundation reinforcement can not only improve the bearing capacity of composite foundation but also reduce the settlement of composite foundation effectively.This article combining the engineering case introduces the designing and calculation method of CM composite foundation and put forward the designing ideas of laying out the composite foundation reinforcement by the principle of adjusting foundation rigidity to reduce differential settlement and selecting strong weathering rock for the bearing stratum of composite foundation reinforcement.

关 键 词：CM复合地基 褥垫层 压密注浆 树根桩 处理后桩间土 变刚度调平 

分 类 号：TU470[建筑科学—结构工程]