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神华集团神朔铁路寇庄站供水井由于煤系地层水止水效果不好,对水质影响较大。针对止水封堵出现的问题,提出了在已成井情况下采用上下分隔器封堵注浆工艺技术,很好地解决了煤系水漏水造成供水井水质浑浊的问题。实践证明,该技术施工简单,使用灵活,止水处理事故效果良好。 相似文献
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本文通过郭村煤矿井筒帷幕灌浆工程实例 ,详细地阐述了钻进、灌浆等施工技术 ,列举了工程质量检测的定性、定量评价成果 ,并总结了工程成功的经验和意义。 相似文献
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在临江建筑施工中,基坑降水是关系整个基坑开挖的关键环节之一,也是影响工期和整个工程施工质量的重要因素。对哈尔滨市一临松花江超高层建筑超深基坑地下水处理的设计及实施过程进行了介绍,对施工过程的设计参数选取、施工经验及不足进行了探讨和总结。 相似文献
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Grout curtains are vertical grout walls installed in the ground. In karst terrains, their construction is primarily connected with dams and reservoirs. Their main role is to increase water tightness and to prevent progressive erosion, blocking possible seepage paths along karst fissures and conduits. In this article, changes in the behaviour of the groundwater level (GWL) and the water temperature in nine deep piezometers, which were caused by the construction of a grout curtain at the ?ale Reservoir on the Cetina River (Croatia), were analysed. The total length of the grout curtain is 3966 m. It spreads 120 m below the dam. The most analysed data are from the period after the dam had been built. Only few data and figures concern the comparison between pre‐ and post‐dam periods. The hourly data of the GWL and the water temperature were analysed for the period between 1 September 2008 at 02:00 h to 31 December 2009 at 23:00 h (11 687 h total) in six deep piezometers (marked in the text and figures as 1, 2, 3, 4, 5 and 6). For three piezometers (marked in the text and figures as A, B and C), some discontinuous measurements of the GWL and the water temperature were available for analysis. The construction of the grout curtain made strong, sudden and possibly dangerous changes to the characteristics of the aquifer and the circulation of groundwater in the local area. Special attention is paid to analyses of the behaviour of the hourly GWL data measured in the piezometers pairs (two neighbouring piezometers, one inside and the other outside of the grout curtain). During more than 80% of the analysed period, the GWL was higher in the piezometer inside the grout curtain than the one outside of it. The intensity and range of the dynamics of GWL was higher in piezometer outside the grout curtain than the inside ones. After the construction of the grout curtain, the maximum measured hydrostatic pressure on some parts of the grout curtain was approximately 40 m. It changes quickly in both time and direction. The water temperature was found to be similar in all of the measured piezometers, and it varies between 10.2 and 15.7 °C with an average value of 12.7 °C. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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通过一例基坑地下水控制的实例,介绍了多种手段在基坑地下水控制的综合应用,特别是在厚砂层中的帷幕施工及局部地下水的控制,对类似基坑有参考意义。 相似文献
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