庙林电站拦河坝基础固结灌浆设计和施工  

Design and Construction of Foundation Consolidation Grouting for Miaolin Power Station Barrage

作　　者：李晓平 李现飞 沙继明 

机构地区：[1]云南省水利水电勘测设计研究院,云南昆明650021

出　　处：《中国水能及电气化》2017年第3期13-17,共5页China Water Power & Electrification

摘　　要：庙林电站首部枢纽大坝基础岩体为Db-12生物碎屑灰岩、Db-22砂质页岩、Db-32长石石英砂岩,节理裂隙较发育,强卸荷带内节理裂隙多微张,泥沙、岩屑半充填,基础岩体被三条断层所分割,破坏了岩体的整体稳定和抗压能力。本文针对坝段不同的受力情况,在坝趾、坝踵和节理裂隙发育及断层的位置采用不同的灌浆孔排距、深度,灌浆压力和施工方案,使开挖后形成的松动体、节理裂隙及断层破碎带得以充填密实,提高了大坝基础强度和承载力,增强了大坝基础面与基岩的抗剪断能力,灌浆后经质量检查达到设计预期效果。The foundation rock mass of head of pivot dam in Miaolin power station is D2^b-1 bioclastic limestone, Db-2 arenaceous shale, Db-3 feldspar quartz sandstone, the joint fissure is easy to develop, joint fissure in strong un-loading zone has slightly openings, sediment and rock debris are half filled, the foundation rock mass is divided by three faults, which damages the overall stability and anti-pressure ability of rock mass. The article direct at different force conditions of dam sections, adopt different drilled grout hole array pitch , depth, ：groUting pressure and construction scheme at toe, dam heel and place of joint fissure development and fault, to make the relaxed rocks, joint fissure and fault fracture zone formed after the digging to be densely filled, improve the dam foundation strength and bearing capacity, enhance the shear-resisting capacity of dam basic plane and bedrock, reach the design expected effect by： quality checking after the grouting.

关 键 词：庙林水电站 固结灌浆设计 施工 

分 类 号：TV543.5[水利工程—水利水电工程]