某基础沉降原因分析及托换加固处理  

Settlement analysis and underpinning reinforcement of building foundation

作　　者：王寒冰[1] 魏焕卫[1] 白世和 

机构地区：[1]山东建筑大学土木工程学院,山东济南250014 [2]山东双得利建设科技有限公司,山东济南250014

出　　处：《四川建筑科学研究》2015年第2期124-128,132,共6页Sichuan Building Science

基　　金：国家自然科学基金项目(41272281);山东省自然科学基金项目(ZR2012EEM016);山东建筑大学博士基金项目(XNBS1206)

摘　　要：通过分析某地块的建筑物地基基础沉降原因,发现引起不均匀沉降的主要原因是基底下回填土及下卧黄土层的遇水湿陷、上部回填土厚度大和基底下高压缩性回填土较厚;另外,经过注浆法加固方案和托换微型桩加固方案的对比,采用托换微型桩法对该建筑物进行加固,并对该建筑物进行托换加固设计。By analyzing the reason that the groundsill of some building subsides, it is found that the main reason bringing on the subsiding is the sinking of back-filing and underlayer of yellow earth under the groundsill thick back-filing above it as well as the thick high-compressible back-filing under the groundsill;besides, compared the method of grouting with that of micro-pile underpinning, the method of micro-pile underpinning was adopted to reinforce the constructure with the underpinning design.

关 键 词：湿陷 微型桩 托换加固 受力分析与计算 

分 类 号：TU443[建筑科学—岩土工程]