Method and device for pre-pressing high-position support single column in water
A single-column, preloading technology, applied in the erection/assembly of bridges, buildings, bridge construction, etc., can solve the problems of high investment, long construction period, high energy consumption, etc. Effect
Active Publication Date: 2013-04-24
GUANGDONG CONSTR CO LTD OF CHINA RAILWAY NO 3 ENG GRP CO LTD +1
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Problems solved by technology
[0005] In order to solve many disadvantages of the existing beam-column support, such as large investment, long construction period, and large energy consumption, the present invention provides a single-column preloading method and device for a high-level support in water. The invention highlights the beam-column support The main influence of the part below the middle beam on the overall reliability of the support and the elastic deformation and inelastic deformation is to realize the preloading preloading effect by preloading the single column of the beam-column support. The preloading of the single pile is based on the pulley block principle The method of back pressure transmission, the method is safe, efficient, environmentally friendly, energy-saving, economical, and widely adaptable
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Embodiment
[0039] Embodiment: The traction system is mainly composed of two 5-ton hoists and a distribution beam made of 2I30 I-beam, and the connection system is mainly composed of a 50-ton 6-door pulley block (including movable pulley and fixed pulley), , Composed of traction wire ropes, the load system is mainly composed of buoyancy tanks, concrete prefabricated blocks, connecting wire rope, It consists of a load-bearing platform made of precision-rolled rebar and 2I30 I-beam.
[0040] The preloading load is 180 tons, and the preloading test weights are as follows: when the floating tank is not filled with water, it weighs 3.84 tons individually, and 6 pieces weigh 23 tons in total; each floating box fills with water 16 tons, and the 6 pieces weigh 96 tons in total; the concrete prefabricated block 4.5 tons each, 12 weighing 54 tons in total, I30 I-beam 100m, weighing 3.7 tons in total, two hoists, 6 pulley blocks, and 8 shackles weighing 3 tons. The above totals 180 tons.
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The invention belongs to the technical field of construction of cast-in-place reinforced concrete beams through a support method in bridge engineering construction, particularly relates to a method and device for pre-pressing a high-position support single column in water, and solves the problems in existing beam column type support preloading of being more in investment, long in construction period, large in energy consumption and the like. The method includes the steps: installing an upper traction system, a middle connection system and a lower loading system, arranging ballasting according to levels, conducting measurement according to levels, and unloading and removing a pre-pressing device according to levels. The device comprises the upper traction system, the middle connection system and the lower loading system. The upper traction system comprises two winches and two distribution beams. The middle connecting system comprises a traction steel wire rope, the traction steel wire rope is connected with a pulley block, and the pulley block is connected with the lower loading system. By means of the method and device, a purpose of pre-pressing a support structure is achieved, hoisting and unloading of piled things in a pre-pressing process and manufacture and storage of a large amount of piled things are avoided, and the problem that a pre-pressing material is hard to recycle, and device is high in power and the like is solved.
Description
technical field [0001] The invention belongs to the technical field of construction of cast-in-place reinforced concrete beams using a support method in bridge engineering construction, and in particular relates to a single-column preloading method and device for a high-level support in water suitable for a beam-column support. Background technique [0002] In the construction of bridge engineering, the bracket method is one of the basic methods for bridge position girders. The basic structural forms of brackets used in cast-in-place reinforced concrete beams include full hall brackets and beam brackets. Beam brackets can be divided into corbels Brackets and post-and-beam brackets. According to the requirements of the relevant national technical specifications, the support structure must be preloaded before the support is officially used. The purpose is to test the reliability of the support structure, measure the elastic deformation of the support and eliminate the inelasti...
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Inventor 胡国伟李建成刘荣华张俊兵刘斌于天生白文选李英杰王俊生张亚涛牛相国郭星亮
Owner GUANGDONG CONSTR CO LTD OF CHINA RAILWAY NO 3 ENG GRP CO LTD