Sectional steel and reinforced concrete beam combination foundation pit supporting protection surrounding purlin and construction method of purlin
A technology for supporting reinforced concrete beams and foundation pits, which can be used in basic structure engineering, excavation, construction, etc., and can solve the problems of inconvenient connection of buttresses or corner braces and low bending strength, so as to shorten the construction period and increase the bending strength , The effect of reducing the project cost
Active Publication Date: 2012-10-03
SHANGHAI STRONG FOUND ENG
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to overcome the disadvantages of low flexural strength of the supporting structure purlins of the existing foundation pit support, and inconvenient connection with opposite braces or corner braces, etc., and provide a composite purlin of section steel and reinforced concrete beams, and the Construction method of combined purlin
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[0033] In order to make it easy to understand the technical means, creative features, objectives and effects achieved by the present invention, the present invention will be further explained below in conjunction with specific drawings.
[0034] See figure 1 or figure 2 , This kind of H-shaped steel and reinforced concrete combined purlin includes a H-shaped steel 1, reinforced concrete beam 2, and embedded connecting bolts 4, with bolt holes 3 on the steel. The H-shaped steel 1 and the reinforced concrete beam 2 are stacked horizontally. The reinforced concrete beam 2 is provided with embedded connecting bolts 4, and the H-shaped steel 1 is connected with the reinforced concrete beam by the embedded connecting bolts. The pre-buried connecting bolt 4 is in a straight, L-shaped or U-shaped shape to increase the bonding surface with the concrete and facilitate the connection with the main reinforcement of the reinforced concrete beam. This kind of combined purlin not only has hig...
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The invention relates to a sectional steel and reinforced concrete beam combination foundation pit supporting protection surrounding purlin and a construction method of the purlin. Sectional steel and reinforced concrete beams are horizontally overlapped and placed and are connected through embedded connecting screw bolts for forming the novel combination surrounding purlin. The stress surface ofthe surrounding purlini is increased so that the stress of the concrete beam is dispersed, cracks and damage of the concrete beam are eliminated, the bending resistance intensity of the surrounding purlin and the axial pressure resistance capability of the sectional steel are improved, the deformation of the foundation pit structure is reduced, and the foundation pit engineering safety is improved. The connection and disconnection with an opposite supporter or a corner supporter can also be convenient, the sectional steel recovery is realized, the cyclic utilization is realized, and the goalsof low carbon and environment protection of the foundation pit supporting protection are reached.
Description
Technical field [0001] The invention relates to the technical field of civil engineering, in particular to the inner support structure and construction method of foundation pit support, and the recycling and utilization of surrounding purlin materials. Background technique [0002] Among the supporting structures of foundation pits, the commonly used purlins for internal support structures mainly include reinforced concrete purlins and section steel purlins. Reinforced concrete purlins can effectively combine the vertical retaining row piles in the foundation pit support into a whole, bearing the horizontal water and soil pressure, but the construction period is long, and the materials cannot be reused; the profiled steel purlins are convenient for construction , Does not need maintenance, the construction period is short, but the overall effect of the vertical retaining pile is not ideal. It can be said that these two types of purlins have their own advantages and disadvantages...
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IPC IPC(8): E02D17/02
Inventor 刘全林宋伟民王冰冰刘斐然金换昊
Owner SHANGHAI STRONG FOUND ENG