Segment Matching Prefabrication Method for Large Standard Components

Abstract

The invention relates to a segment matching and prefabricating method for a large-scale standardized structural element, in particular to a segment matching and prefabricating method for segment matching and prefabricating on the large-scale standardized structural element through a poured pedestal. The method includes the first step of installing a segment steel reinforcement cage on the poured pedestal, the second step of installing a formwork, the third step of carrying out full-section concrete pouring on the segment steel reinforcement cage, the fourth step of dismantling the formwork on a structural element segment and completing supporting system conversion on the structural element segment, the fifth step of pushing the structural element segment in place according to a preset segment pushing distance, the sixth step of repeating the above steps till full-section concrete pouring on the last structural element segment is completed, the seventh step of dismantling the formwork on the last structural element segment and completing the supporting system conversion on the structural element segment, and the eighth step of pushing all the structural element segments to designed positions. According to the method, full-section concrete pouring is carried out on the poured pedestal; various structural element segments can be prefabricated through the same poured pedestal, so the various structural element segments can be prefabricated and molded strictly according to the same size and specification.

Description

technical field [0001] The invention relates to a segmental matching prefabrication method for large standard components, in particular to a segmental matching prefabrication method for segmental matching prefabrication of large standard components by using pouring pedestals. Background technique [0002] The prefabrication of large standard components (such as large T-beams and box girders) that are common in China mainly adopts the cast-in-place method and short-line matching method, and the transfer and storage of component segments mainly use lifting equipment such as gantry cranes and beam lifting machines. [0003] The so-called cast-in-place method is to bind the steel bars on the fixed pedestal, then install the side formwork, inner formwork and end formwork, pour concrete, remove the side formwork and inner formwork after the concrete reaches the formwork removal strength, and stretch the prestressed steel strand , and finally transfer the large standard components ...

AI Technical Summary

Problems solved by technology

[0005] There is basically no matching relationship between the small segments of the cast-in-place construction method, and the randomness is large; while the short-line matching method is used for construction, although the matching relationship between two small segments can be guaranteed, it is still impossible to guarantee the matching relationship between longer segments. Linear relationship, and need to use large lifting equipment to transfer the segment to the storage area

[0006] In recent years, with the development of factory method prefabrication of large-scale standard components at home and abroad, especially for the segmental prefabrication construction of large-scale standard components on the seabed with super-large size and overweight, the traditional cast-in-place method or short-line matching method + lifting equipment transfer and storage The construction technology of component segments has been difficult to guarantee

The main reasons are as follows: (1) The subsea member segments are mostly used on the seabed or buried underground. There is usually an inner cavity used as a submarine traffic pipeline in the member segment, and the cross-sectional size of the member segment is larger than that of a conventional box girder. (2) The length of the segment should not be too short, because the shorter the length, the more the number of joints will be, and the difficulty of joint treatment will increase (mainly the water stop treatment at joints), and the risk will be higher

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