不同施工方案对岩基上混凝土浇筑块应力的影响研究

A Study of Concrete Pour Stress on the Rock Foundation with Different Loadcases

对岩基上混凝土浇筑块在不同浇筑层厚、不同间歇时间及不同岩基变形模量下的温度和应力进行了研究,得到结论:①随着间歇时间的增加,混凝土水化热温升的最高温度降低;随着浇筑厚度的增加,混凝土水化热温升的最高温度增加。②随着间歇时间的增大,坝体横河向应力和顺河向应力减小;随着间歇时间的增加,浇筑层表面应力与浇筑层中间应力的差异越大;随着浇筑层厚的减小,坝体横河向应力和顺河向应力减小。不同岩基变模对横河向应力影响较小,对顺河向应力影响大于对横河向应力的影响。

The concrete pour on the rock foundation with different layer thickness,different intermittent time and different rock foundation deformation modulus is discussed. Some conclusions are reached：（1）As intermittent time increases, the highest temperature of concrete heat of hydration decreases; as layer thickness increases, the highest temperature of concrete heat of hydration increases. （） As the intermittent time increases, the crossing river stress and following river stress decreases. As intermittent time increases, the difference of stress in the surface of lift thickness and in the middle of lift thickness is bigger. And as the layer thickness decreases, the stress will decrease. The cross river stress affected by different rock foundation deformation modulus is small, and the following river stress affected by different rock foundation deformation modulus is bigger than the cross river stress.