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A platform for research: civil engineering, architecture and urbanism
Anti-seepage treatment method for deep-buried karst leakage channel of reservoir
The invention belongs to the field of water conservancy and hydropower engineering dam foundation seepage prevention, and discloses an anti-seepage treatment method for a deep-buried karst leakage channel of a reservoir. The anti-seepage treatment method comprises the implementation steps that 1, construction is stopped when an abnormal situation occurs in the curtain grouting implementation process, geological CT scanning is carried out on a pilot hole, and the interval karst development situation is mastered; 2, according to a geological CT scanning result, geophysical prospecting holes areformed near abnormal hole sites, and the trend of a karst leakage channel is found out; 3, when drill falling occurs in the drilling process, 'gravel and self-compacting concrete' are adopted for alternate pouring; 4, when concrete cannot be poured or slurry leaks from the low adjacent valley, paste slurry formed by mixing cement slurry with bentonite is adopted for pouring; and 5, after the karstleakage channel is effectively blocked, curtain grouting is carried out, and during quality inspection, a durability pressurized-water test is carried out on the area filled with the paste slurry. The method can effectively prevent the slurry from leaking along the low adjacent valley pipeline, ensures the reliability of reservoir seepage prevention, and greatly saves the engineering investment and the construction cost.
本发明属于水利水电工程坝工基础防渗领域的一种水库深埋岩溶渗漏通道防渗处理的方法，实施步骤包括：1、在实施帷幕灌浆过程中出现异常情况时停止施工，先导孔开展地质CT扫描，掌握区间岩溶发育情况。2、根据地质CT扫描结果，在出现异常孔位附近开设物探孔，查明岩溶渗漏通道走向。3、在钻孔过程中出现掉钻时，采用“碎石+自密实混凝土”交替灌注。4、当混凝土无法灌注时或者低邻谷出现渗漏浆液时，采用水泥浆掺加膨润土的膏状浆液灌注。5、岩溶渗漏通道有效封堵后再采用实施帷幕灌浆，质量检查时对灌注膏状浆液区域进行耐久性压水试验。该方法能有效防止浆液沿低邻谷管道渗漏，保证水库防渗的可靠性，同时大大节省工程投资及施工成本。
Anti-seepage treatment method for deep-buried karst leakage channel of reservoir
The invention belongs to the field of water conservancy and hydropower engineering dam foundation seepage prevention, and discloses an anti-seepage treatment method for a deep-buried karst leakage channel of a reservoir. The anti-seepage treatment method comprises the implementation steps that 1, construction is stopped when an abnormal situation occurs in the curtain grouting implementation process, geological CT scanning is carried out on a pilot hole, and the interval karst development situation is mastered; 2, according to a geological CT scanning result, geophysical prospecting holes areformed near abnormal hole sites, and the trend of a karst leakage channel is found out; 3, when drill falling occurs in the drilling process, 'gravel and self-compacting concrete' are adopted for alternate pouring; 4, when concrete cannot be poured or slurry leaks from the low adjacent valley, paste slurry formed by mixing cement slurry with bentonite is adopted for pouring; and 5, after the karstleakage channel is effectively blocked, curtain grouting is carried out, and during quality inspection, a durability pressurized-water test is carried out on the area filled with the paste slurry. The method can effectively prevent the slurry from leaking along the low adjacent valley pipeline, ensures the reliability of reservoir seepage prevention, and greatly saves the engineering investment and the construction cost.
本发明属于水利水电工程坝工基础防渗领域的一种水库深埋岩溶渗漏通道防渗处理的方法，实施步骤包括：1、在实施帷幕灌浆过程中出现异常情况时停止施工，先导孔开展地质CT扫描，掌握区间岩溶发育情况。2、根据地质CT扫描结果，在出现异常孔位附近开设物探孔，查明岩溶渗漏通道走向。3、在钻孔过程中出现掉钻时，采用“碎石+自密实混凝土”交替灌注。4、当混凝土无法灌注时或者低邻谷出现渗漏浆液时，采用水泥浆掺加膨润土的膏状浆液灌注。5、岩溶渗漏通道有效封堵后再采用实施帷幕灌浆，质量检查时对灌注膏状浆液区域进行耐久性压水试验。该方法能有效防止浆液沿低邻谷管道渗漏，保证水库防渗的可靠性，同时大大节省工程投资及施工成本。
Anti-seepage treatment method for deep-buried karst leakage channel of reservoir
一种水库深埋岩溶渗漏通道防渗处理的方法
GAO DONGHONG (author) / ZHANG JINGJING (author) / LUO JUJIAN (author)
2021-03-19
Patent
Electronic Resource
Chinese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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