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本文根据国内外原型观测资料,对柱状浇筑重力坝竖向纵缝开度变化规律及应力状态进行了分析研究。查明了由于坝体下游面变温区混凝土所产生的季节性热胀冷缩作用,促使坚向纵缝的局部张开的必然性,这就使坝内应力状态与整体重力坝截然不同。为了使这种坝内竖向纵缝面有足够的接触面,起到较好的传力作用;本文建议所采取的结构措施和施工工艺措施,这就可以克服竖向纵缝局部张开的缺点和改善了坝踵和上游坝面的应力状况,从而提高了这种坝的安全度。
In this paper, according to the prototype observation data at home and abroad, the columnar pouring gravity dam vertical longitudinal seam opening variation and stress state were analyzed. As a result, the seasonal expansion and contraction caused by the concrete in the downstream area of the dam have been identified, which leads to the inevitability of local opening of the rigid longitudinal seam. This makes the stress state in the dam completely different from that of the whole gravity dam. In order to make the vertical longitudinal seam surface of this dam have enough contact surface, play a better force transmission; This paper proposes the structural measures taken and construction process measures, which can overcome the vertical vertical slits open Shortcomings and improved stress conditions at the heel and the upstream dam, thereby increasing the safety of such a dam.