云南犁地坪水库溢洪道泄槽设计与边坡处理

Discharge chute design of spillway of Lidiping Reservoir in Yunnan Province and bank slope treatment

云南省犁地坪水库溢洪道布置在高陡岩质边坡上。针对溢洪道在基础开挖施工过程中泄槽Ⅰ段基础发生垮塌导致泄槽左侧底板悬空、泄槽Ⅱ段存在部分建基面岩体较破碎等问题,采取调整溢洪道轴线及上部结构布置,泄槽Ⅰ段下部基础采用混凝土置换地基、固结灌浆和设置锚杆以及泄槽左下方山体边坡增加挂网喷锚支护等综合加固处理措施;纵坡较陡的泄槽Ⅱ段采取清除基础破碎岩体、底板设置锚筋桩和两边墙外侧增设止滑翼墙等措施,消除了溢洪道失稳的安全隐患。工程已投入使用4 a,运行情况良好。

The spillway of Lidiping Reservoir in Yunnan province is designed on a high and steep rocky slope. Several geological defects were encountered during construction such as the suspended left spillway bottom caused by collapse of partial foundation during the construction and the broken rock mass in partial foundation in the section II spillway,so the reinforcement measures for section I was adopted as adjusting the spillway axis and upper structure layout,using the concrete to replace the lower foundation,choosing reinforcing grouting and rod anchoring,bolt shotcreting mesh supporting at left lower mountain body of the spillway; and other measures were used for section II such as clearing the fractured rock at foundation,setting anchoring pile on bottom plate and anti- slide wing wall on the outside of sidewall etc. The spillway has operated for 4 years in a normal state till now.