岩基约束橡胶混凝土溢洪道的温度应力试验

Temperature stress test of Batholith constraint rubber concrete spillway

为解决岩基约束溢洪道裂缝,在岩基上分别浇筑橡胶混凝土和普通混凝土,并在距离岩基不同位置埋设应变计,测试不同岩基约束混凝土溢洪道的温度应力。结果表明,距岩基0.20m、0.65m、1.00m处,普通混凝土溢洪道的最大温度应力分别为4.7MPa、3.9MPa、3.6MPa,相同位置橡胶混凝土溢洪道的最大温度应力为3.0MPa、2.5MPa、2.3MPa。岩基约束橡胶混凝土的温度应力小于普通混凝土,距离岩基不同位置,橡胶混凝土溢洪道的温度应力梯度降低。

Rubber concrete and ordinary concrete are respectively poured on the batholith to solve the cracks of batholith constraint spillway. Strain gauges are embedded in positions with different distances from the batholith, and they are used for testing the temperature stress of different batholith constraint concrete spillways. The results show that the maximum temperature stress of ordinary concrete spillways is respectively 4. 7MPa, 3.9MPa and 3.6MPa in the positions 0. 20m, 0. 65m and 1.00m away from the batholith. The maximum temperature stress of rubber concrete spillway in the same position is 3.0MPa, 2. 5MPa and 2. 3MPa aiming at rubber concrete spillway in the same position. The temperature stress of rubber concrete is less than ordinary concrete. The temperature stress gradient of the concrete spillway is reduced according to positions with different distances to the batholith.