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Diversion tunnel plug head exhaust structure and exhaust method thereof
The invention discloses a diversion tunnel plug head exhaust structure and an exhaust method thereof; the diversion tunnel plug head exhaust structure comprises a diversion cylinder and a concrete plug head arranged in a blocking segment in the diversion cylinder; the bottom of the concrete plug head is pre-buried with an air discharge pipe and a water discharge pipe; an upstream and a downstream of the concrete plug head in the diversion cylinder are respectively provided with a cofferdam; a grouting gallery and a gate well connected with the grouting gallery are arranged in the concrete plug head; the exhaust method comprises the following steps: 1, paving the air discharge pipe and the water discharge pipe; 2, building the cofferdams; 3, opening a water discharge butterfly valve; 4, casting the concrete plug head; 5, opening an air discharge butterfly valve; 6, observing air discharge pipe water discharge conditions. In certain regions, the diversion tunnel is deeply buried, the top is steep and no drilling construction road can be paved, and vent holes are hard to tap; the diversion tunnel plug head exhaust structure and the exhaust method can be applied to the diversion tunnel plugging construction process, thus fast discharging a cavity in the front segment of the diversion tunnel, preventing gas explosion caused by boosting pressure, and ensuring safety of the plug head structure.
Diversion tunnel plug head exhaust structure and exhaust method thereof
The invention discloses a diversion tunnel plug head exhaust structure and an exhaust method thereof; the diversion tunnel plug head exhaust structure comprises a diversion cylinder and a concrete plug head arranged in a blocking segment in the diversion cylinder; the bottom of the concrete plug head is pre-buried with an air discharge pipe and a water discharge pipe; an upstream and a downstream of the concrete plug head in the diversion cylinder are respectively provided with a cofferdam; a grouting gallery and a gate well connected with the grouting gallery are arranged in the concrete plug head; the exhaust method comprises the following steps: 1, paving the air discharge pipe and the water discharge pipe; 2, building the cofferdams; 3, opening a water discharge butterfly valve; 4, casting the concrete plug head; 5, opening an air discharge butterfly valve; 6, observing air discharge pipe water discharge conditions. In certain regions, the diversion tunnel is deeply buried, the top is steep and no drilling construction road can be paved, and vent holes are hard to tap; the diversion tunnel plug head exhaust structure and the exhaust method can be applied to the diversion tunnel plugging construction process, thus fast discharging a cavity in the front segment of the diversion tunnel, preventing gas explosion caused by boosting pressure, and ensuring safety of the plug head structure.
Diversion tunnel plug head exhaust structure and exhaust method thereof
WANG XIANGYU (author) / ZHENG QING AN (author)
2015-10-07
Patent
Electronic Resource
English
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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