Light-weight steel structure plafond of large-span underground powerhouse of hydroelectric station
An underground workshop and large-span technology, applied to truss structures, girders, roofs, etc., can solve the problems of high maintenance costs, poor fire performance, and poor bearing capacity, and achieve easy inspection and maintenance, convenient inspection and maintenance, and high load-carrying capacity effect of ability
Active Publication Date: 2015-05-06
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Problems solved by technology
The steel-concrete composite cast-in-place structure has the advantages of strong bearing capacity, small size, strong impermeability, strong corrosion resistance, and good fire resistance, but it has high requirements for construction timing, and later construction requires the use of bridge cranes in the factory Formwork, there are disadvantages such as large construction interference, low efficiency, long construction period, and large project investment; the steel grid structure has a strong bearing capacity, but it requires high precision in construction and installation, and is limited to the conditions of the underground workshop. Only high-altitude The bulk method also has the disadvantages of difficult construction and long construction period; the light steel beam plus decorative roof arch plate and arch corrugated steel roof structure has the advantages of quick and convenient construction, but its bearing capacity and corrosion resistance are poor. Poor fire performance and high maintenance costs
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] Such as figure 1 As shown, the light-weight steel structure ceiling of the large-span underground powerhouse of the hydropower station includes two arched trusses composed of upper chords 11, webs 13 and lower chords 12. The two arched trusses are parallel to each other and separated by a distance. The two arched trusses parallel to each other are connected by slabs or slats to form an arched truss unit 1, and a group of said Arched truss unit 1, the above two support columns are support columns 31 and support columns 32, the group of arched truss units 1 are arranged at intervals along the longitudinal axis of the underground powerhouse, and the two arched truss units 1 The ends are respectively connected with two supporting columns; a group of purlins 4 or tie rods are arranged above the group of arched truss units, that is, a group o...
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The invention discloses a light-weight steel structure platfond of a large-span underground powerhouse of a hydroelectric station. The light-weight steel structure plafond is strong in carrying capacity and convenient and fast to construct. The light-weight steel structure plafond is provided with a double-layer grid structure between two supporting pillars of an upstream side and a downstream side of the underground powerhouse, wherein the double-layer grid structure is composed of an arch truss unit group, a purline group and a tie-bar group. And an arch plate structure, a fan recondition platform and a partition are installed on the double-layer grid structure. The partition is arranged on the top face of the light-weight steel structure plafond to separate the plafond and an air channel between top walls of the underground powerhouse. An air delivery channel and a smoke exhaust channel are respectively formed. The light-weight steel structure plafond has the advantages of being strong in carrying capacity, convenient and fast to construct, convenient to examine and repair and maintain.
Description
technical field [0001] The invention relates to a light steel structure ceiling of a large-span underground powerhouse of a hydropower station. Background technique [0002] The span of the large-span underground powerhouse of a hydropower station is generally 20m to 32m. At present, the roof of the large-span underground powerhouse of a hydropower station is more commonly used to build a steel grid between the two support columns on the outer side of the rock wall on the upstream and downstream sides of the underground powerhouse. Structure, light steel steel beam plus decorative ceiling plate structure or steel-concrete composite cast-in-place structure, arched corrugated steel roof is also used. The steel-concrete composite cast-in-place structure has the advantages of strong bearing capacity, small size, strong impermeability, strong corrosion resistance, and good fire resistance, but it has high requirements for construction timing, and later construction requires the u...
Claims
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IPC IPC(8): E04B7/08E04C3/11
Inventor 肖平西廖成刚张勇王波黄克戬龚少红
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE