新集水库坝基消力池固结灌浆试验研究

Experimental study on consolidation grouting of the stilling pool on the foundation of Xinji Reservoir

摘要

为保证新集水库大坝浇筑施工进度及坝基固结灌浆质量，需要进行坝基固结灌浆试验。根据试验区地质条件制定了固结灌浆试验方案，对灌浆前后岩体波速、抬动变形、透水率等进行了分析与讨论。其中试验区灌浆后岩体波速的平均值比灌浆前增大7.5%;试验中各孔段均未发现有消力池底板砼抬动迹象变形；消力池试验区灌前灌后平均透水率分别为31.92 Lu、12.96 Lu,灌后透水率明显下降。这些结果表明了此次固结灌浆具有良好效果。

Abstract

In order to ensure the progress of dam pouring and the quality of dam foundation consolidation grouting, it is necessary to conduct dam foundation consolidation grouting test. According to the geological conditions of the test area, the consolidation grouting test scheme is established, and the wave velocity, lifting deformation and water permeability of the rock mass before and after grouting are analyzed and discussed. The average wave velocity of rock mass after grouting is 7.5% higher than that before grouting. In the experiment, no lifting signs of concrete deformation were found in each hole section. The average water permeability before and after irrigation was 31.92 Lu and 12.96 Lu, respectively, and the water permeability decreased significantly after irrigation. These result show that the consolidation grouting has a good effect.

关键词

固结灌浆 / 坝基 / 压水试验 / 物探检测

Key words

consolidation grouting / foundation of a dam / pressure water test / geophysical detection

Author summay

瞿刚修(1973—), 男, 高级工程师, 学士, 主要从事水利水电工程施工管理工作。E-mail: [e-mail]