某电厂1^#冷却塔不均匀沉降成因分析及处理方案研究  

Analysis and Treatment Scheme for Differential Settlement of the 1^# Cooling Tower in a Power Plant

作　　者：赵来顺[1] 雷珂娜[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,西安710054

出　　处：《结构工程师》2013年第3期150-154,共5页Structural Engineers

摘　　要：分析了某电厂1#冷却塔产生不均匀沉降的原因,主要是由于地基土浸水发生了湿陷性沉降。根据冷却塔结构特征和工程问题特点提出了钻孔灌注桩基础托换法加固处理方案。钻孔灌注桩基础托换法即将原来基础上承受的全部或部分荷载通过新增灌注桩传递到深部较好且无湿陷性的土层上,加固了既有地基基础并阻止上部建筑继续沉降。另外,介绍了加固用钻孔灌注桩的选型、定位、单桩承载力确定方法及桩承台与原基础结合面连接方法,并对加固处理效果进行了预测。In this paper, the differential settlement causes of the 1^# cooling tower in a power plant was ana-lyzed. It is indicated that the settlement is primarily due to collapsible settlement of the foundation soil with water immersion. The cast-in-place pile foundation was proposed for cooling tower strengthening. Therefore, the entire or partial exiting loads can be passed to deeper soil layer. In this way, foundation can be reinforced and settlement can be controlled. Design features of reinforced concrete piles including lectotype and location, the method to determine single pile bearing capacity, and details of bar connection between pile caps and the original foundation joint surface were introduced and the reinforcement effects were predicted. It can be re-ferred by similar engineering projets.

关 键 词：冷却塔 不均匀沉降 湿陷性 桩基托换 

分 类 号：TU753.8[建筑科学—建筑技术科学]