枕头坝水电站江沟渣场排水洞出口消力池左岸 深厚堆积体支护处理设计

枕头坝水电站江沟特大型渣场采用排水洞泄水排洪，出口地形狭窄、地质条件及外围条件复杂。因消能建筑物及5#公路的布置，需在其左岸堆积体处开挖填筑形成约23 m高的永久高陡边坡，且河床覆盖层深厚、水量丰富的条件下，采用钢筋混凝土灌注桩、桩顶联接梁、桩顶锚索及贴坡混凝土对消力池左岸边坡进行联合支护处理，有效地解决了堆积体垂直开挖、5#公路基础填筑、堆积体边坡施工、运行期稳定及消力池左岸防水流冲涮问题。本文介绍了钢筋混凝土灌注桩在边坡抗滑稳定中的应用，可供类似工程借鉴参考。

Design of supporting for deep-thick accumulated body at left bank of stilling pool for discharge tunnel of Jianggou Spoil Yard for construction of Zhentouba Hydropower Station

A discharge tunnel is adopted for the flood discharge of Jianggou Super-large Spoil Yard for construction Zhentouba Hydropower Station, of which the topography of the outlet is narrow with a complicated geological and surrounding condition. Due to the layout of both the energy dissipation structure and the No.5 highway, a permanent high-steep slope with the height of 23 m is necessary to be formed by excavating and filling the accumulated body at its left bank, and then the reinforced concrete grouting pile, pile-top binding beam, pile-top anchorage and slope-fitting concrete are adopted for the joint-supporting of the slope at the left bank of the stilling pool under the condition of deep-overburden and rich water amount; with which the problems from the vertical excavation of the accumulated body, base-fill of the No.5 highway, slope construction of the accumulated body, stability during operation period and anti-scouring of the left bank of the stilling pool are effectively solved. The application of the reinforced concrete grouting pile to the anti-sliding stability of the slope is introduced herein, so as to provide some references for the similar project concerned.