Study on curtain grouting technology and parameters in "red layer" area of Yunnan Province
Dongyuan SU , Zuyuan XIAO , Jiachun ZI , Xijun LI
Water Resources and Hydropower Engineering ›› 2025, Vol. 56 ›› Issue (S2) : 330 -333.
The "red layer" in Yunnan exhibits characteristics of weak water permeability, strong hydrophilicity, susceptibility to softening upon exposure to water, and a tendency to disintegrate when submerged. Selecting an appropriate grouting process and parameters is crucial for establishing a continuous and effective anti-seepage curtain. Based on multiple engineering grouting tests, the orifice closed segmented circulation grouting method, along with parameters such as mixed grout, maximum grouting pressure not exceeding 1.0 MPa, single-row hole layout, and 1.5 m hole spacing, has been promoted and applied in production grouting. These measures successfully form a continuous and effective anti-seepage curtain. The implemented reservoir project has been operational since the closure of water storage. No leakage has occurred at the dam foundation or around the dam, and all requirements for anti-seepage have been met. This provides valuable engineering experience that can be referenced and promoted for similar projects.
Yunnan "red layer" area / curtain grouting / process and parameter
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