A method for dismantling the concrete lower formwork and supporting frame of a cantilevered corbel
A technology of concrete and support frame, which is applied in sea area engineering, construction, barrage/weir, etc. It can solve the problems of large construction difficulty and safety risks, difficult to arrange formwork removal, etc., so as to reduce construction cost and management cost, and fast construction progress , the effect of less resource investment
Active Publication Date: 2022-04-01
SINOHYDRO BUREAU 5
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Problems solved by technology
After the construction of the cantilevered corbel concrete is completed, because the overhanging part is too long, there are great construction difficulties and safety risks in the removal of the corbel bottom formwork and the outer support frame, and it is difficult to arrange corresponding equipment for the formwork removal at the lower part of the corbel
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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] 1. Corbel pouring layers
[0024] The corbel construction layering is determined according to the support system. Pre-embed the positioning cone 2 on the side of the concrete (select the appropriate positioning cone according to the construction load), and pre-embed the steel column 1 when the concrete is poured to the last layer below the corbel.
[0025] 2. Install the construction platform
[0026] After the gate pier is constructed to the corbel elevation, the positioning cone 2 is used to install the prefabricated operating platform 3 . The operating platform 3 is made of channel steel, and the bracket is reserved for suspension fasteners, which can be directly suspended on the positioning cone 2.
[0027] 3. Formwork and support frame
[0028] Install the formwork and steel bars, and use the pre-buried positioning con...
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The invention discloses a method for dismantling a formwork and a supporting frame of a cantilevered corbel concrete lower part, which comprises the following steps: after the gate pier concrete is poured to a specified elevation, the steel column is pre-embedded; after the gate pier is constructed to the corbel elevation, installation and positioning cone, and install a prefabricated operating platform on the positioning cone; install the formwork and steel bars, fix the formwork to the steel column through the tie bars, and pre-embed a vertical steel pipe before pouring the corbel to generate a reserved hole; After the concrete strength reaches the formwork removal strength, remove the lower formwork and support frame of the cantilevered corbel and stack them on the operating platform; place a winch on the top of the concrete of the cantilevered corbel; pass the steel wire rope of the winch through the reserved hole, and use the winch Unload the operation platform to the ground smoothly; seal the reserved holes and complete the corbel construction. The method of the invention makes the concrete construction of the cantilevered corbel safer and faster.
Description
technical field [0001] The invention relates to the field of concrete construction of water conservancy and hydropower structures, in particular to a method for removing a lower formwork and a support frame of a cantilevered corbel concrete. Background technique [0002] According to "Water Conservancy and Hydropower Construction Organization Design" and other relevant materials, the construction schemes of cantilever corbel concrete pouring in my country's hydropower construction include prefabricated concrete formwork pull-in, pull-in formwork, and tripod-supported construction methods. After the construction of the cantilevered corbel concrete is completed, because the overhanging part is too long, there are great construction difficulties and safety risks in the removal of the corbel bottom formwork and the outer support frame, and it is difficult to arrange corresponding equipment for the formwork removal at the lower part of the corbel. Contents of the invention [0...
Claims
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IPC IPC(8): E02B7/20
CPCE02B7/20
Inventor 李永山杨彪陈猛周佳骏马福海于庆
Owner SINOHYDRO BUREAU 5