某变电站沉降原因分析及微型桩托换加固设计  

Study on causes of settlement and micro pile underpinning reinforcement design of a substation

作　　者：孙川[1] 魏焕卫[1] 王建强[1] 陈朝伟 

机构地区：[1]山东建筑大学土木工程学院,山东济南250014 [2]山东建和土木工程咨询有限公司,山东济南250101

出　　处：《山东建筑大学学报》2016年第3期283-288,共6页Journal of Shandong Jianzhu University

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)

摘　　要：建筑物地基基础不均匀沉降严重威胁着建筑物的质量与安全,采取有效的措施对建筑物地基基础进行加固处理是有效减少不均匀沉降事故发生的前提和基础。文章基于某220 k V变电站发生不均匀沉降的工程实例,针对该工程实际地形条件,通过对沉降观测数据进行分析,阐述了造成该变电站基础不均匀沉降和倾斜的主要原因,基于变形控制的原则,采用二次注浆微型桩托换加固技术对变电站进行加固方案设计,并对加固前后内应力变化进行对比分析。The foundation uneven settlement of buildings is a serious threat to the quality and safety of the buildings, and taking effective measures to reinforce the foundation of buildings is the premise and foundation to reduce the occurrence of uneven settlement. Based on the engineering case of a 220 kV substation uneven settlement, in view of the actual terrain conditions of the projecthe paper elaborates the main causes of uneven settlement and overall tilt of the foundation by analy settlement observation data. Based on consideration of settlement control, the two times of grouting micro pile underpinning internal stress before and after reinforcement were analyzed.

关 键 词：不均匀沉降 微型桩托换 加固设计 强度验算 

分 类 号：TU996[建筑科学—供热、供燃气、通风及空调工程]