A segmented construction method for large cantilevered concrete structures
A technology of concrete structure and construction method, which is applied to building components, building structure, formwork/formwork/work frame, etc., can solve the problems of large supporting section of scaffolding, large volume of full-scale scaffolding, damage to main structure, etc., and saves The amount of material, convenient processing and layout, and the effect of optimizing the form of force
Active Publication Date: 2019-05-03
CHINA CONSTR SECOND ENG BUREAU LTD
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Problems solved by technology
[0003] The present invention proposes a segmented construction method for a large cantilevered concrete structure. It is necessary to solve the problem that in the traditional construction method, the cross-section of the scaffolding is large and is easy to cause damage to the main structure. The height is too large to be realized, and it is necessary to set up a processing operation frame and adopt the technical problems of multi-lane cables
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[0051] Such as figure 1 and figure 2 As shown, the main structure 1 of this embodiment is a six-star hotel project. The beam-slab surface elevation of the cantilevered balcony structure on the east side of the fifth floor of the hotel podium is 27.15m, and the cantilevered concrete structure is 6200mm larger than the size of the main structure 1, which is large Cantilevered concrete structure; there are six cross-sectional dimensions of the cantilevered concrete structure, namely 400 mm×1200 mm, 600 mm×1300 mm, 300 mm×1200 mm, 500 mm×1300 mm, 400 mm×1300 mm, 200 mm×1300 mm, the maximum cross-section is 600×1300mm, and the height from the top of the basement reaches 32.1m. The fourth floor of the hotel is a swimming pool, the pool bottom elevation is 20m, and the pool top is 21.2m (same as the beam and slab elevation of the main structure of the fourth floor), The floor height of the fourth floor and the fifth floor is 6m; when constructing the cantilevered concrete structure...
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Disclosed is a large cantilever concrete structure section construction method. The method comprises the following steps that 1, according to the cantilever size of a cantilever concrete structure, and a to-be-constructed cantilever concrete structure is divided into a first construction section and a second construction section; 2, on the body structure below the to-be-constructed cantilever concrete structure, a scaffold support is laid along the edge of the frame of the body structure; 3, the first construction section of the to-be-constructed cantilever concrete structure is constructed; 4, an anchor ring is pre-embedded on the outer side face, above the to-be-constructed cantilever concrete structure, of the body structure; 5, a stay cable is arranged between the scaffold support and the body structure above the to-be-constructed cantilever concrete structure in a pulling mode; 6, supporting pieces are arranged between the scaffold support and frame columns of the body structure; 7, the second construction section of the to-be-constructed cantilever concrete structure is constructed. The technical problems that in a traditional construction method, the scaffold supporting section is large, the scaffold mass is large, the traditional method is not economical, the height is too large, and the method cannot be implemented are solved.
Description
technical field [0001] The invention belongs to the field of construction, and in particular relates to a construction method of a large cantilevered concrete structure. Background technique [0002] In order to meet the architectural requirements, large-scale high-rise public buildings often set up large concrete cantilevered concrete structures protruding from the outer walls, and the formwork support system has become a difficult point in the construction of the entire structure. Because the cantilevered concrete structure is high from the ground, it is not economically and technically feasible to adopt a floor-standing support system. The use of a simple steel pipe overhanging support frame or a pure steel cantilever support structure is limited by the length of the cantilever; the traditional method is generally one-time use. The method of adding steel support or cable-stayed wire rope, but the traditional construction method has the following disadvantages: ①The cantil...
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IPC IPC(8): E04B5/32E04G11/40E04G11/48E04G17/00E04G17/16
CPCE04B5/32E04G11/40E04G11/48E04G17/00E04G17/16
Inventor 徐小洋季文涛刘兴军白贺昶王伟
Owner CHINA CONSTR SECOND ENG BUREAU LTD