Abstract
The Daxingzhai Reservoir Project is primarily designed for flood control, while also serving the functions of water supply, irrigation, and ecological water replenishment. Through a two-stage curtain grouting production test, this paper systematically analyzes the effects of different grouting pressures on unit cement consumption, permeability rate, and construction efficiency, and proposes grouting pressures appropriate for the strata of this project. Additionally, for special hole sections characterized by water inrush and large grout absorption, process optimization measures including flow limiting, pressure reduction, thick grout, and intermittent waiting for setting are proposed. The research findings can provide technical reference for similar projects.
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Preamble
Experiment and Result Analysis of Curtain Grouting in the Riverbed of Daxingzhai Reservoir
Guobin Cai, Guangxiong Tang
Sinohydro Engineering Bureau 8 Co., Ltd., Changsha 410004, China
Abstract
The Daxingzhai Reservoir project is primarily designed for flood control, with additional functions of water supply, irrigation, and ecological water replenishment. Through a two-stage production-scale curtain grouting experiment, this paper systematically analyzes the influence of different grouting pressures on unit cement consumption, permeability rate, and construction efficiency, and proposes grouting pressures appropriate for the geological strata of this project. Additionally, for special hole sections exhibiting water inrush and high grout absorption, optimization measures including flow limiting, pressure reduction, thick grout application, and intermittent waiting for setting are proposed. The research findings can provide technical references for similar projects.
Keywords: curtain grouting; unit cement consumption; permeability rate; grouting pressure; special hole section treatment