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Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam

A prefabricated assembly and segmented technology, which is applied to bridges, bridge parts, bridge construction, etc., can solve the problems of high construction requirements, limited ground traffic, and long erection period, so as to shorten the construction period, facilitate on-site construction, and reduce construction costs. effect of difficulty

Inactive Publication Date: 2013-07-24
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The construction of the cover beam in the bridge is one of the key points of the bridge construction. The main construction method of the traditional cover beam is the bracket method. The mold is set on the upper part of the pier to pour the concrete, and the mold is removed after the concrete is cured and solidified. This method has the following Disadvantages: 1. Long erection period; 2. Consumption of manpower and materials; 3. In the construction of urban bridges, ground traffic will be restricted; 4. The cost of ground support for sites with poor geological conditions is high; 5. Higher requirements for the site
This method is very suitable for the construction of small and medium-sized cover beams, but for the construction of large-scale cover beams (such as more than 400 tons), it is difficult to have a matching spreader for lifting operations on site, and due to the large volume and weight, the construction requirements are relatively high , and there are security risks

Method used

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  • Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam
  • Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam
  • Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam

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Effect test

Embodiment 1

[0024] figure 1 Schematic flow diagram of the segmental prefabrication assembly method for large cap beams. This example proposes a segmental prefabricated assembly method for a large-scale cap girder, so as to realize the successful hoisting of a large-scale cap girder exceeding 400 tons on two bridge piers, such as figure 1 As shown, it specifically includes the following steps:

[0025] Step S1: According to design requirements, divide the cover beam from the middle into two prefabricated sections 1 for prefabrication. Both prefabricated sections 1 are provided with transverse sleeves for piercing prestressed tendons 5 and for piercing The longitudinal casing of the connecting piece 3 connected to the pier 2; for example, the connecting piece 3 in this embodiment is JL32 finish-rolled rebar.

[0026] Step S2: Combine Figure 2-4 As shown, the prefabricated segment 1 is hoisted to the pier 2 by a crane, and the connecting piece 3 is pierced in the longitudinal casing to c...

Embodiment 2

[0031] Figure 5 Schematic diagram for the application of segmental prefabricated assembly structures in large cap beams. In this embodiment, a segmental prefabricated assembly structure in a large cap beam can be built according to the construction steps of the first embodiment, such as Figure 5 As shown, the assembled structure includes two prefabricated segments 1 and a cast-in-place segment 6, the two pre-fabricated segments 1 are connected through the cast-in-place segment 6, and prestressed tendons are arranged between the two prefabricated segments 1 and the cast-in-place segment 6 5.

[0032] As a further specific implementation of this embodiment, as Figure 5 and Figure 6 As shown, the two prefabricated sections 1 are provided with transverse casings for piercing the prestressing tendons 5, and the prefabricated sections 1 are provided with longitudinal casings for piercing the connectors 3 connected with the pier. The transverse casing and the longitudinal cas...

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Abstract

The invention discloses a method for prefabricated assembly of middle-divided sections of a large-sized capping beam. The method for the prefabricated assembly of the middle-divided sections of the large-sized capping beam comprises the steps that the capping beam is divided into two prefabricated sections from the middle of the capping beam to be prefabricated, and the two prefabricated sections are respectively provided with a transverse sleeve and a longitudinal sleeve; a crane is used for lifting one of the two prefabricated sections on a bridge pier, connecting pieces are arranged inside the longitudinal sleeve in a penetrating mode, prefabricated assembly between the prefabricated section and the bridge pier is accomplished, and a stable cable is arranged to connect the prefabricated section and the bridge pier at the same time; the other prefabricated section is lifted and is fixed on another bridge pier; a cast-in-place section is poured, concrete pouring is carried out on the two prefabricated sections, abutting joint is accomplished, and prestressed tendons are guided into the two prefabricated sections and the cast-in-place section in a crosswise penetrating mode. The invention further discloses a prefabricated assembly structure of the middle-divided sections of the large-sized capping beam. The prefabricated assembly structure of the middle-divided sections of the large-sized capping beam comprises the two prefabricated sections and the cast-in-place section. The method for the prefabricated assembly of the middle-divided sections of the large-sized capping beam and the prefabricated assembly structure of the middle-divided sections of the large-sized capping beam are low in construction requirement for prefabrication of the capping beam and site lifting, and are applicable to construction of the large-sized capping beam.

Description

technical field [0001] The invention relates to the technical field of prefabricated cover beam construction, in particular to a segmental prefabricated assembly method and an assembled structure of a large cover beam. Background technique [0002] The construction of the cover beam in the bridge is one of the key points of the bridge construction. The main construction method of the traditional cover beam is the bracket method. The mold is set on the upper part of the pier to pour the concrete, and the mold is removed after the concrete is cured and solidified. This method has the following Disadvantages: 1. Long erection period; 2. Consumption of manpower and materials; 3. In the construction of urban bridges, ground traffic will be restricted; 4. The cost of ground support for sites with poor geological conditions is high; 5. Higher requirements for the site . [0003] Therefore, in order to overcome the shortcomings of the above-mentioned bracket method construction, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/02
Inventor 周振兴闫兴非王勇吴连盛葛景春
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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