Suspended ceiling structure of long span underground powerhouse and construction method thereof

Abstract

The invention discloses a suspended ceiling structure of a long span underground powerhouse and a construction method thereof. The suspended ceiling structure of the long span underground powerhouse comprises two equilong rock anchor beams which are constructed and completed are located on two sides of an upstream and a downstream, a steal arched beam is located between the two rock anchor beams and stretches across in the upstream and downstream directions, an arched waterproof layer purlin support and an arched waterproof layer purlin strip are supported at the top flange of the steal arched beam, and an arched waterproof board is fixed to the arched waterproof layer purlin strip; a plurality of steel hanging rings and steel hanging rods are hung on the bottom flange of the steal arched beam, a main runner of a horizontal decorating layer is hung under the steel hanging rods, and a horizontal decorating layer purlin strip is fixed under the main runner; a fixed decorating board is installed on the lower surface of the horizontal decorating layer purlin strip, a plurality of air conduits are arranged in space between the horizontal decorating layer and an arched waterproof layer, and a plurality of maintenance trestle roads along cliffs are installed on the upper surface of the main runner. The steel arched beam and all steel components can be conveyed to a site to install after being processed, manufactured and completed in a factory, the construction is convenient, and the construction period is shortened. The water seepage of a powerhouse top arch is drained to an upstream and downstream side wall drainage ditch from an upper layer of the waterproof board, the problem that the top arch leaks water is solved, a decorating role of a lower layer of the horizontal decorating layer is played, and the operating requirement of power station is met.

Description

Technical field [0001] The invention discloses a suspended ceiling structure and a construction method thereof, in particular to a suspended ceiling structure and a construction method suitable for large-span caverns such as a main powerhouse and a main transformer tunnel in an underground powerhouse. Background technique [0002] In the layout of the main underground powerhouse, ventilation pipes, lighting fixtures, air-conditioning water pipes and other equipment are generally arranged in the space between the suspended ceiling of the powerhouse and the spray anchor layer of the top arch rock wall. As the current roof arch support form of the factory building usually adopts reinforced concrete spray anchor support, although drainage holes are drilled in the mountain body of the roof arch of the factory building, water seepage in the roof arch rock wall cannot be avoided. If no measures are taken, it is allowed to drip directly. Going to the generator level in the main building ...

AI Technical Summary

Problems solved by technology

The first method requires a lot of scaffolding, and the construction is more difficult and the construction period is long

Although the second method is convenient in construction and less in materials, the same layer of color steel plate is used for waterproofing and decoration. There are many leakage points in the top arch, and the leaking water from the top arch will drip onto the ventilation pipes in the interlayer, and even drip to the generator layer of the main workshop through the steel plate joints, tuyeres, lamp ports, etc., affecting production, and will cause corrosion to the ventilation pipes over time. , or even need to replace the air duct in the short term

In the third method, due to the small space between the upper and lower chords and the web members of the triangular steel roof truss, it is difficult to arrange the air ducts in the construction, and the horizontal connection maintenance plank road between several rows of air ducts cannot be arranged.

The fourth method is divided into two types: hanging single-layer steel plate ceiling and hanging double-layer ceiling. Hanging single-layer ceiling is to directly hang single-layer ceiling beams, ceiling purlins and steel plates with suspenders, and between the ceiling plate and the top arch spray layer. Ventilation pipes and other equipment are arranged in the space. In addition to the disadvantages of the second method, the leakage of the roof arch will corrode the suspenders after a long time, and the suspenders need to be maintained regularly. If the maintenance is not timely, the entire ceiling will be damaged. There will be potential safety hazards in the structure; the second double-layer suspended ceiling of the fourth method also has the aforementioned shortcomings

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