库什塔依水电站冬季施工的碾压式土石坝沥青混凝土心墙配合比试验研究

Experimental Study on the Mix Proportion of the Asphalt Concrete Core Wall of Rolled Earth-rock Dam in Winter Construction of Cush Kobita Bea Hydropower Station

库什塔依水电站位于寒冷地区,沥青混凝土心墙施工期较短,为加快工程施工进度,提前发挥发电效益,对其沥青混凝土心墙冬季低温施工的配合比进行了试验研究,并通过模拟试验验证了-25℃低温条件下的施工工艺。主要包括确定适合冬季低温施工的配合比,冬季施工沥青混凝土的分离度、层间结合性能、压实效果、接合面渗透性及沥青混凝土的力学特性。试验成果表明,沥青混凝土的各项性能均满足设计要求。

Cush Kobita Bea Hydropower Station is located in cold region of Xinjiang ,which leaves shorter time for the construction of asphalt concrete core wall of the rolled earth-rock dam .In order to shorten the construction time and make it possible for the station to operate in advance ,the mix propotion of asphalt concrete core wall were studied for winter low temperature construction .The construction process were simulated at -25℃ to test for resolution ,performance between the layers ,compaction effect ,permeability of contact face and physical-mechanical properties of the asphalt concrete .The results indicate that the properties of the asphalt concrete can meet the design requirements .