石头河水利枢纽工程位于陕西省眉县斜峪关以上3华里处,枢纽建筑物有大坝、灌溉发电输水洞、坝后电站、溢洪道、泄洪洞等(见图1)。坝区靠近渭河地堑边缘,地质构造比较复杂,河床覆盖深厚。大坝高105米,为粘土防渗心墙砂卵石坝壳的土石混合坝(河床段横剖面见图2)。主体工程量,坝体填筑855 The Shitouhe Water Conservancy Project is located at 3 Wuliri above the Xiaoyuguan in Meixian County, Shaanxi Province. There are dams, irrigation power generating water holes, post-dam power stations, spillways and spillway tunnels in the hub buildings (see Figure 1). Dam area near the verge of the Weihe graben, geological structure is more complex, thick riverbed. The dam is 105 meters high. It is an earth-rock mixing dam with clay-impervious core-wall sand-gravel dam shell (Figure 2). The main project, dam fill 855