云南“红层”地区帷幕灌浆工艺和参数研究

Study on curtain grouting technology and parameters in "red layer" area of Yunnan Province

摘要

云南“红层”具有透水性弱、亲水性强、遇水易软化、失水易崩解的特点，选择合理的灌浆工艺和合理的灌浆参数是形成连续有效的防渗帷幕的关键。从多个工程灌浆试验得出的孔口封闭分段循环灌浆工艺和混合浆液、灌浆最大压力不超过1.0 MPa、单排孔布置、1.5 m孔距等灌浆参数推广和指导应用至生产灌浆中，均能形成连续有效的帷幕，实施的水库工程自下闸蓄水后运行至今，均未出现坝基渗漏和绕坝渗漏现象，均达到了防渗目的要求，为同类工程提供了值得鉴见和推广的工程经验。

Abstract

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.

关键词

云南“红层”地区 / 帷幕灌浆 / 工艺和参数

Key words

Yunnan "red layer" area / curtain grouting / process and parameter

Author summay

苏东院(1984—), 男, 高级工程师, 学士, 主要从事水利水电工程地质勘察工作。E-mail: [e-mail]