尼尔基水利枢纽工程坝型选择

Choice of dam type for Nierji hydraulic complex

尼尔基水利枢纽工程中挡水坝由河谷内主坝和左右岸阶（台）地上的副坝组成，坝线总长达７２４０ｍ。鉴于坝址区的地形、地质条件，当地天然筑坝材料等各方面条件，基本坝型确定为土石坝。根据施工条件、建设工期、施工进度、工程投资等因素，确定主坝为沥青混凝土心墙土石坝，副坝为粘土心墙堆石坝。

The retaining dam in the Nierji hydraulic complex consists of a major dam situated in Nenjiang river valley as well as two auxiliary dams located at the bench of left and right bank respectively. According to the topographical and geological condition at the area of dam site, and to the local damming material, the earth-rock dam was made of choice as the basic type of dam. Based on the construction condition and period, job schedule and capital cost, finally, the earth-rock dam with asphaltic concrete core wall and the rock-fill dam with clay core was decided respectively for the major dam and for the auxiliary dams.