加糙拦石坎在三峡工程导流明渠截流中的实施及质量控制

三峡工程导流明渠截流具有流量大、落差高、流速快、水流深等特点,且截流是在人工开凿的光滑河渠底板上进行,为保证截流顺利合龙,有效控制抛投材料流失量,在龙口段先行施工垫底加糙拦石坎.本文介绍了加糙拦石坎的方法及其质量控制.

Application of Gabion Sills to Close up Diversion Channel of TGP

As the closure work of the diversion channel of TGP is carried out under the conditions of high closure flow velocity and high closure drop, and the channel-bed is rather smooth, for reducing the loss of fill stone blocks, the gabion sills are preconstructed at the closure-gap to rough the channel-bed and to ensure the success of final - gap closing, the detail about the construction of the gabion sill and its quality control are described.