考虑温度效应的井壁竖向附加力反演分析  

Inverse analysis for vertical additional force of shaft wall considering temperature effect

作　　者：何朋立[1,2] 王在泉[3] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]洛阳理工学院土木工程系,河南洛阳471023 [3]青岛理工大学理学院,山东青岛266033

出　　处：《岩土力学》2013年第12期3425-3430,共6页Rock and Soil Mechanics

摘　　要：为了分析考虑温度应力后作用于深厚表土层立井井壁竖向附加力,建立了由于立井内、外壁温度差产生的温度自应力和径向膨胀受阻产生的温度应力解析式。基于井壁是由于竖向应力超过钢筋混凝土井壁极限抗压强度而发生破裂的事实,对作用于井壁上的温度荷载、自重、水平侧压力和竖向附加力在井壁内产生的竖向应力分量进行了分析,结果表明,竖向附加力是导致井壁破裂的最主要因素,温度应力也是诱发井壁破裂的重要因素。同时在考虑井壁温度应力和井壁破裂特征的基础上,利用井壁结构设计理论通过反演分析得到了地层疏水沉降时井壁承受的最大竖向附加力的数值,为新建井壁设计和已建成投产井壁的安全性评估提供重要参考依据。In order to analyze the role of vertical additional force on the shaft wall under deep alluvium when considering temperature effect, the temperature stress analytical formula of shaft wall is established, included the temperature self stress produced by temperature difference between inside and outside wall and the temperature stress produced by radial expansion hindered. Based on the fact that the rupture of shaft wall in the deep alluvium is due to the vertical stress of the shaft wall exceeding the limit of the reinforced concrete strength, the vertical stress components in the shaft wall are analyzed, which are produced by the temperature load, dead weight, horizontal lateral pressure and vertical additional force. The results show that the vertical additional force is the most important factor to lead to shaft wall fracture and the temperature stress is also an important factor of shaft wall fracture. Considering the rupture characteristics of shaft wall, the maximum value of vertical additional force which is caused by the settlement of the strata drainage is gotten through inverse analysis based on shaft lining structure design theory. And the reference is provided for the design and safety assessment of shaft walls in future.

关 键 词：深厚表土层 破裂 温度应力 竖向附加力 反演分析 

分 类 号：TU352[建筑科学—结构工程]