帷幕灌浆回浆变浓孔段水泥灌入量计量研究——以桐子林水电站为例
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摘要
目前在灌浆孔段水泥灌入量的计量中,如何考虑"回浆变浓"影响的相应计量方法研究成果很少,相关规范对此也未明确规定。以桐子林水电站坝基帷幕灌浆工程施工为例,针对帷幕灌浆施工"小循环"灌浆系统的布置特点及"孔口封闭、自上而下分段、孔内循环"的施工工艺特性,通过对灌浆过程实际水泥灌入量与自动记录仪记录到的灌入岩体浆液体积所含水泥量、灌注水泥浆液密度的相关关系进行分析研究,确定了桐子林水电站坝基帷幕灌浆"回浆变浓"孔段水泥灌入量的计算方法。相关经验可供类似工程借鉴。
At present, there are few research results on how to take into account the effect of "dense slurry returning" in the measurement of cement grouting quantity in relevant sections, and there is no clear regulation on this in the relevant codes. Taking curtain grouting for dam foundation of Tongzilin Hydropower Station as an example, the grouting layout is characterized as "small circulation" grouting system in curtain grouting and the construction technology characteristics are described as "hole mouth sealing, top-down segmentation, and in-hole circulation". Based on analysis of the relationship between the actual cement grouting amount in grouting process and the cement content and the slurry density recorded by the automatic recording instrument, the measurement method of cement grouting quantity in dense slurry returning section of dam foundation curtain grouting was determined. Relevant experiences can be used as references in similar projects.
At present, there are few research results on how to take into account the effect of "dense slurry returning" in the measurement of cement grouting quantity in relevant sections, and there is no clear regulation on this in the relevant codes. Taking curtain grouting for dam foundation of Tongzilin Hydropower Station as an example, the grouting layout is characterized as "small circulation" grouting system in curtain grouting and the construction technology characteristics are described as "hole mouth sealing, top-down segmentation, and in-hole circulation". Based on analysis of the relationship between the actual cement grouting amount in grouting process and the cement content and the slurry density recorded by the automatic recording instrument, the measurement method of cement grouting quantity in dense slurry returning section of dam foundation curtain grouting was determined. Relevant experiences can be used as references in similar projects.
引文
[1] 丁建波,万海涛.皂市水利枢纽石英砂岩微细裂隙帷幕灌浆效果分析[C]//2009年地基基础工程与锚固注浆技术研讨会论文集,北京:2009.
[2] 冯辉,郑文华.托口红层岩溶地基常规帷幕灌浆施工技术研究[C]//中国水利学会地基与基础工程专业委员会第12次全国学术会议论文集,成都:2013.
[3] 肖平,吴楠.帷幕灌浆回浆返浓问题处理及施工技术研究[J].人民长江,2014,45(22):69- 71
[4] 何向红,管仕军.锦屏一级水电站坝基深孔帷幕灌浆问题处理[J].人民长江,2015,46(10):4-6.
[5] 王海东,贺毅.溪洛渡水电站深孔帷幕灌浆施工技术[C]//中国水利学会地基与基础工程专业委员会第13次全国学术研讨会论文集,南京:2015.
[6] 邓兆俊,李桂林,吴楠.大岗山水电站复杂地层灌浆效果分析[J].人民长江,2014,45(22):72-75.
[7] 张雄.大岗山水电站帷幕灌浆若干关键技术问题探讨[J].人民长江,2017,48(S2):200-203.
[8] 李正兵,黄平.锦屏特高拱坝坝基帷幕防渗灌浆关键技术探讨[J].四川水利,2015(5):6-10.
[9] 陈旭荣.对坝基帷幕岩体细裂隙水泥灌浆问题的探讨[J].人民长江,1987,18(12):48-54.
[10] 刘畅,蔡斌.“水力压裂”技术在基岩帷幕灌浆中的应用[J].广西水利水电,2013(6):23-25.
[11] 李少芹,刘铁银,黄龙全.浅谈大坝基础灌浆工作中特殊情况的处理[J].黑龙江水利科技,2002(2):137-138.
[12] DL/T5148-2012水工建筑物水泥灌浆施工技术规范[S].北京:中国电力出版社,2012.
[2] 冯辉,郑文华.托口红层岩溶地基常规帷幕灌浆施工技术研究[C]//中国水利学会地基与基础工程专业委员会第12次全国学术会议论文集,成都:2013.
[3] 肖平,吴楠.帷幕灌浆回浆返浓问题处理及施工技术研究[J].人民长江,2014,45(22):69- 71
[4] 何向红,管仕军.锦屏一级水电站坝基深孔帷幕灌浆问题处理[J].人民长江,2015,46(10):4-6.
[5] 王海东,贺毅.溪洛渡水电站深孔帷幕灌浆施工技术[C]//中国水利学会地基与基础工程专业委员会第13次全国学术研讨会论文集,南京:2015.
[6] 邓兆俊,李桂林,吴楠.大岗山水电站复杂地层灌浆效果分析[J].人民长江,2014,45(22):72-75.
[7] 张雄.大岗山水电站帷幕灌浆若干关键技术问题探讨[J].人民长江,2017,48(S2):200-203.
[8] 李正兵,黄平.锦屏特高拱坝坝基帷幕防渗灌浆关键技术探讨[J].四川水利,2015(5):6-10.
[9] 陈旭荣.对坝基帷幕岩体细裂隙水泥灌浆问题的探讨[J].人民长江,1987,18(12):48-54.
[10] 刘畅,蔡斌.“水力压裂”技术在基岩帷幕灌浆中的应用[J].广西水利水电,2013(6):23-25.
[11] 李少芹,刘铁银,黄龙全.浅谈大坝基础灌浆工作中特殊情况的处理[J].黑龙江水利科技,2002(2):137-138.
[12] DL/T5148-2012水工建筑物水泥灌浆施工技术规范[S].北京:中国电力出版社,2012.