Construction method for midspan closure segment of longspan continuous rigid frame bridge

A construction method and rigid-frame bridge technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as long time required, large safety hazards, high cost, etc., to improve work efficiency, save money, and reduce self-weight Effect

Active Publication Date: 2012-06-13
CHINA RAILWAY 23RD CONSTR BUREAU LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0025] 1. The installation process of the hanger is cumbersome and requires a long construction period; it takes a long time to switch between the bottom mold of the hanger at the bottom of the box girder and the bottom mold of the hanging basket, and there are great safety hazards during the co

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  • Construction method for midspan closure segment of longspan continuous rigid frame bridge
  • Construction method for midspan closure segment of longspan continuous rigid frame bridge
  • Construction method for midspan closure segment of longspan continuous rigid frame bridge

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[0075] All the features disclosed in this specification, or all disclosed methods or steps in the process, except for mutually exclusive features and / or steps, can be combined in any manner.

[0076] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless specifically stated, can be replaced by other equivalent or equivalent alternative features. That is, unless otherwise stated, each feature is just one example of a series of equivalent or similar features.

[0077] Such as Figure 4 As shown, the layout of the main bridge span is as follows: the length of the mid-span is 130m, the length of the side span is 145.32m, the main bridge is a single-box double-chamber, the top slab is 20.3m wide, and the bottom slab is 12.9m wide, divided into 35 beam sections.

[0078] Among them, the height of section 0# is 15.1m, the height of mid-span beam is 4.6m, the position of pier 16 is equipped with expansion joints, the bridge deck has a longi...

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Abstract

The invention discloses a construction method for the midspan closure segment of a longspan continuous rigid frame bridge, which is characterized by comprising the following steps: (a) adopting a hanging basket cantilever pouring method, and constructing a cantilever beam section in front of the closure segment; (b) disassembling the hanging basket, manufacturing components disassembled from the hanging basket into a cradle, and installing the cradle on the two beam sections of the midspan closure; (c) carrying out equivalent counterweight; and (d) supporting the beam. The traditional hanging basket is utilized in the closure process instead of manufacturing the cradle again. After the traditional hanging basket system is disassembled and combined again, the closure cradle is formed, thereby guaranteeing the design requirement, improving the working efficiency and saving fund. The construction method for the midspan closure segment is suitable for constructing of the same type of suspended irrigation closure. The traditional hanging basket is modified without additionally adding the cradle, the self weight is lightened, and the problem that the upper limit requirement of the total amount of the additional loading amount of the closure segment is exceeded if the hanging basket is directly used for closure.

Description

technical field [0001] The invention relates to a construction method of a continuous rigid frame bridge, in particular to a construction method of a mid-span closure section of a long-span continuous rigid frame bridge. Background technique [0002] In the prior art, the cantilever pouring of large-span box girders is mainly divided into the following three parts: [0003] The first part is the construction of the 0# section: the pier top beam section (that is, the 0# section) is poured on the pier top bracket or false frame and the pier beam is temporarily consolidated; the 0# section is the one with the largest height and the heaviest weight among all the beams , and it is on the top of the pier column, so it is not necessary to use the hanging basket for construction. [0004] The second part is the construction of the cantilever pouring part: using the cantilever pouring method, install the cantilever hanging basket on the 0# section, and pour the main beam to the fron...

Claims

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Application Information

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IPC IPC(8): E01D21/10
Inventor 孙亚峰郑邦友温秉银魏力谢格
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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