Composite support and construction method for foundation pit
A construction method and composite technology, which are applied in basic structure engineering, excavation, construction, etc., can solve the problem of difficulty in simultaneously improving the mechanical performance of concrete cast-in-place piles and prestressed tension bars, and reduce the soil pressure on the back of the wall, reduce the Improve the integrity and improve the effect of force performance
Active Publication Date: 2022-01-07
亚都建设集团有限公司
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Problems solved by technology
This technology introduces the prefabricated support structure into the foundation pit support project, which can improve the site construction efficiency to a certain extent, but it is difficult to simultaneously improve the mechanical performance of concrete pouring piles and prestressed tension bars
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0030]Those skilled in the art should understand that in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and The above terms should not be cons...
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The invention provides a compound support and construction method for a foundation pit, in which a grid support pile is vertically drilled in the soil body behind the wall, and grouting is made at the bottom of the grid support pile to form a reinforcement area for the wall back; The wall back balance plate is connected to the concrete pouring pile, and the upper surface is provided with a pressure balance body; the splint brace is set between the pile side splint and the wall back balance plate, and the assembly type is set between the fixed end plate and the sliding end plate. As for the block, the assembled block is fastened by transverse tie bars, and the position control connection bolt and post-cast concrete are set between the fixed end plate and the sliding end plate; The stretching body is connected, and the tightening pressure is applied to the pile side stretching body through the pressure plate position control bolt; the first companding and second companding bars are set between the anchor tube bar and the prestressed tie bar of the combined anchor bar , the prestressed tendons are stretched twice. The invention can improve the mechanical performance of concrete filling piles and prestressed tension bars, and improve the layout efficiency of assembled crown beams and pile side anchor beams.
Description
technical field [0001] The invention relates to the field of foundation pit support engineering, in particular to a foundation pit composite support and construction that can improve the mechanical performance of concrete pouring piles and prestressed tendons, and improve the layout efficiency of assembled crown beams and pile side anchor beams method. Background technique [0002] With the rapid development of social economy and the continuous acceleration of urbanization, many large buildings have begun to build basements or other underground projects due to the limitation of urban space. Subsequently, foundation pit support technology has been widely used and developed, but limited by construction machinery and construction environment, there are often problems such as poor mechanical performance of concrete pouring piles and prestressed tension bars, and low on-site construction efficiency during the construction process. . [0003] In the prior art, there is a compoun...
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IPC IPC(8): E02D17/04
Inventor 劳月清王忠炫唐孝杰徐超祝晓伟潘角香
Owner 亚都建设集团有限公司