Ventilating smoke dissipating system used for underground cavern construction of large hydropower station

Abstract

The invention discloses a ventilating smoke dissipating system used for underground cavern construction of a large hydropower station. The system comprises an underground cavern, wherein one end of the underground cavern is an air inlet, the other end is an air outlet, a construction adit is formed at one end of the air inlet of the underground cavern, an air inlet pipeline is laid on the top of the construction adit and is obliquely arranged in the construction adit, an air supply machine is arranged at one end of the air inlet pipeline, the air supply machine is arranged at the hole of the construction adit, an exhaust outlet is formed in the top wall of one end of the air outlet of the underground cavern, an exhaust shaft is arranged on the exhaust outlet, the upper end of the exhaust shaft is connected with an exhaust footrill, the exhaust footrill is provided with a wind stop wall and an exhaust fan at a position connected with the exhaust shaft. The system has the beneficial effects of greatly improving the air quality of a working face of each large underground cavern, creating a good construction working environment and ensuring construction quality and construction safety.

Description

technical field [0001] The invention relates to the technical field of ventilation and smoke dissipation during the construction period of an extra-large underground cavern, in particular to a ventilation and smoke dissipation system used in the construction period of an underground cavern of a large hydropower station. Background technique [0002] The underground tunnel of the hydropower station is a complex cavern group composed of many caverns, such as the main powerhouse, the main transformer room, the water diversion tunnel, the tailrace tunnel, the bus tunnel, and the traffic tunnel. During the construction process of each cavern, a large amount of pollutants will be generated in operations such as drilling, blasting, and slag removal. If they are not discharged in time, once the control standards are exceeded, it will cause great safety hazards to the construction personnel. [0003] In the prior art, the methods of ventilating and dispersing smoke during the constru...

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Problems solved by technology

[0004] The invention overcomes the disadvantage of poor ventilation and smoke dissipation effect in the ventilation and smoke dissipation system in the construction process of the underground cavern of the hydropower station in the prior art, and provides a method to make the air quality of the working face during the construction period of the underground cavern good, and greatly improve the working conditions on site Ventilation and smoke dispersion system for underground caverns of large hydropower stations during construction period

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