摘要
针对短龄期混凝土强度容易受到附近爆破振动的影响,进行了一系列有针对性的模型实验,以确定在建核岛新浇灌混凝土强度所能承受的最高爆破振动速度值。实测结果表明C25、C40混凝土在浇筑12h、3d、7d凝期时受到1cm/s、5cm/s振幅的爆破振动后,与未受振动的混凝土相比、其强度、钢筋握裹力都不会受到明显影响。由于核电建设安全性的特殊性要求,本文提出对于核岛新浇筑的混凝土,其爆破振动阈值控制在1cm/s以内时,其强度不会受到影响。
The blasting seismic wave can decrease the quality of newlaid concrete. Because of the high criterion of the nuclear power station construction, the paper makes a series of model test to study the threshold of the blasting vibration velocity effecting quality of fresh concrete which is laid at different time, eg.7 days, 3 days and 12 hours. The test result ponits out that the quality of C25 and C40, endured the blasting vibration at 1cm/s and 5cm/s, makes no different compared with the concrete which is not affected by the blasting wave. The paper proposals that for the nuclear power station a reasonable threshold of the blasting vibration velocity is 1cm/s.
出处
《世界地震工程》
CSCD
2003年第2期163-167,共5页
World Earthquake Engineering
基金
国家自然科学基金资助项目(19872075)
