云南水力发电2024，Vol.40Issue(3)：91-98,8.DOI:10.3969/j.issn.1006-3951.2024.03.024
帮东河水库大坝趾板固结灌浆试验施工技术分析
Analysis of Construction Technology for Consolidation Grouting Test of Toe Plate of Bangdonghe Reservoir Dam
摘要
Abstract
Taking the concrete face rockfill dam of Bangdonghe Reservoir as an example,on-site consolidation grouting tests were conducted to analyze and evaluate the grouting effect,and to propose construction parameters that comply with regulatory standards for the formal production of consolidation grouting.The results show that during the pre-grouting water pressure test,the injection flow rate was between 70 L/min and 90 L/min,and there was no backflow at the orifice.It is recommended to use a 1:1 slurry for grouting.The underground rock layers in this area are relatively loose,with a large number of cracks and high permeability.Under the designed grouting pressure,there is no lifting phenomenon of the toe board during the water pressure test(0.24 MPa)and grouting process(0.3 MPa),and the grouting pressure can be appropriately increased.The grouting effect of this experiment is good,but the slurry consumption is relatively high.It is recommended to mix clay or fly ash locally to reduce costs and improve economic benefits.The permeability rate of the test hole significantly decreased after drilling and grouting in two orders,and the permeability rate of the inspection hole was qualified,which also indicates that the grouting pressure can be appropriately increased.It is recommended to increase the formal grouting pressure from the original design value of 0.3 MPa to 0.35 MPa or 0.4 MPa,increase the grouting diffusion range,and improve the quality of consolidation grouting.Two inspection holes were subjected to elastic wave velocity quality inspection,and the test results met the standards.关键词
固结灌浆试验/灌浆效果/压水试验/灌浆压力/弹性波速/质量检查Key words
consolidation grouting test/grouting effect/water pressure test/grouting pressure/elastic wave velocity/quality inspection分类
建筑与水利引用本文复制引用
查兰厂,周雨晖,郭述强,张玉斌,徐建生,李绍凯..帮东河水库大坝趾板固结灌浆试验施工技术分析[J].云南水力发电,2024,40(3):91-98,8.基金项目
中建股份科技研发计划资助课题(CSCEC-2022-Q-53) （CSCEC-2022-Q-53）
中建六局科技研发计划资助课题(CSCEC6B-2022-Z-14) （CSCEC6B-2022-Z-14）
