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三峡工程茅坪溪土石坝最大坝高104m,坝轴线长1062m,防渗墙轴线总长1840m,其中沥青混凝土心墙总长880m,最大高度94m,采用碾压施工方法。沥青混凝土心墙的厚度由下而上渐变,即由1.2 m 变至0.5 m。心墙选用新疆克拉玛依石化厂水工沥青;矿料选用距工地25km 的王家坪料场的石灰岩,现场加工为20～100mm、10～5mm、5～2.5 mm 三级料,细料用人工砂或天然沙。施工机械化程度很高,施工流程比较复杂。在施工中进行了定额测定分析,发现在施工各道工序中,沥青混凝土损耗量在16%以上。
Three Gorges Project Maopingxi earth dam the largest dam height 104m, dam axis length 1062m, the total length of the cut-off wall 1840m, of which the total length of asphalt concrete core wall 880m, the maximum height of 94m, the use of rolling construction method. Asphalt concrete core wall thickness gradient from the bottom up, that is, from 1.2 m to 0.5 m. The heart wall is made of hydraulic asphalt from Karamay Petrochemical Plant in Xinjiang. The limestone is selected from the limestone of Wangjiaping yard of 25km away from the site. The materials are processed in the field of 20 ~ 100mm, 10 ~ 5mm, 5 ~ 2.5mm, Natural sand. Construction mechanization is very high, the construction process is more complicated. In the construction of a quantitative determination of the analysis and found that in the construction process, asphalt concrete loss in more than 16%.