上海长江隧桥斜拉桥承台大体积混凝土温度及应力监测分析

Monitor and Analyse on Temperature and Stress within Mass Concrete of Bridge Pier's Bearing Platform in Shanghai Changjiang Tunnel-Bridge Project

在长江隧桥工程中主通航孔斜拉桥承台混凝土浇筑后的养护期,为及时了解承台大体积混凝土内部的温度以及应力变化情况,防止其开裂,采用了先进的信息化施工方式,即在线监测,得到了大体积混凝土硬化期间温度及应力发展的典型曲线,同时发现保温养护对抑制混凝土收缩有很重要的影响。

In order to observing and surveying the changes of temperatures and stresses within the mass concrete and then for preventing from creck, an advanced technology of on-line monitor is applied during construction of the bearing platforms of bridge piers in Shanghai Changjiang Tunnel-Bridge Project. The typical curves on development of temperature and stress are obtained. And it is found that the preservation curring has an important effect on restraining the shrinkage of concrete.