混凝土长墙结构中温度变化及其对内部变形发展的影响

TEMPERATURE CHANGE AND ITS INFLUENCE ON INTERNAL DEVELOPMENT OF DEFORMATION IN STRUCTURE OF CONCRETE LONG WALL

混凝土长墙结构中,因内部产生较大的温度收缩应力易引起混凝土的开裂。对某工程混凝土挡土墙施工时结构内外温度和变形的监测分析表明,混凝土的入模温度和升温、降温速率及合理的养护是控制混凝土结构裂缝发生的首要因素,配合比对厚度不大的长墙结构的开裂影响不大。

In the structure of concrete long walls , it is easy to lead to the crack of concrete , because the large shrinkage stress of temperature occurs internally. During the construction of the retaining wall , the inside and outside temperature and deformation are monitored and analysed. The results show that the mould loading temperature ,increasing temperature rate , decreasing temperature rate and the maintainance of suitable quantity are the first factors for controlling the crack of the concrete structure , and the influence of the mix proportion on the crack of the long wall with a certain thicknessnot big is not big.