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Corrugated steel web PC box girder, inner supporting and outer pulling device and construction method of supporting at first and lining next

A corrugated steel web and box girder technology, applied in bridges, bridge construction, bridge parts, etc., can solve the problems of corrugated steel web buckling stability and prestressing efficiency difficult to balance, so as to improve the reuse rate and ensure buckling Stability and the effect of ensuring construction safety

Active Publication Date: 2021-11-05
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a corrugated steel web PC box girder, an inner brace and outer pull device and a construction method for brace first and then lining, so as to solve the buckling stability of the corrugated steel web in the prior art Technical problems that are difficult to balance with prestressing efficiency

Method used

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  • Corrugated steel web PC box girder, inner supporting and outer pulling device and construction method of supporting at first and lining next
  • Corrugated steel web PC box girder, inner supporting and outer pulling device and construction method of supporting at first and lining next
  • Corrugated steel web PC box girder, inner supporting and outer pulling device and construction method of supporting at first and lining next

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] This embodiment provides a kind of internal support and external pulling device of corrugated steel web PC box girder, such as Figure 1 to Figure 8As shown, a PC box girder with corrugated steel webs has an inner brace and outer pull device, including a cross brace 1, and a right brace mechanism 2 and a left brace mechanism 3 are reversibly installed on both lateral sides of the brace plate 1. , the right brace mechanism 2 and the left brace mechanism 3 are oppositely arranged and have the same structure; a plurality of adjustable support rods 4 are arranged on the top of the cross brace plate 1, and the adjustable support rods 4 are installed on the right brace mechanism 2 and the left brace mechanism. between the mechanisms 3; a vertical support mechanism 5 is installed on the bottom surface of the cross brace plate 1;

[0100] The right stretching mechanism 2 includes an upper mounting plate 201 and a lower mounting plate 202 which are arranged in parallel and oppos...

Embodiment 2

[0115] This embodiment provides a PC box girder with corrugated steel webs, such as Figure 1 to Figure 8 As shown, the corrugated steel web PC box girder 10 includes a box girder top plate 1001 and a box girder bottom plate 1002 arranged in parallel, and a pair of corrugated steel webs 1003 is vertically installed between the box girder top plate 1001 and the box girder bottom plate 1002, and also includes The installation space 9 for the inner brace and outer pull device is set between the box girder top plate 1001 and the box girder bottom plate 1002 inside the corrugated steel web PC box girder 10;

[0116] The installation space 9 for the inner brace and outer pull device is used to install the inner brace and outer pull device. In this embodiment, the inner brace and outer pull device adopts the inner brace and outer pull device of the corrugated steel web PC box girder in embodiment 1;

[0117] A pair of corrugated steel webs 1003 are respectively detachably installed w...

Embodiment 3

[0125] This embodiment provides a construction method of first bracing and then lining construction of a corrugated steel web PC box girder, which adopts the inner bracing and outer pulling device of the corrugated steel web PC box girder in Embodiment 2. The method comprises the following specific steps:

[0126] Step 1, build side span main girder:

[0127] Step 1.1, construction of bridge piers and side span girders;

[0128] Step 1.2, carry out ground treatment to the pier foundation, and construct the pier foundation and pier main body;

[0129] Step 1.3, set the side-span support, construct the side-span main beam on the side-span support, and complete the construction of the side-span main beam.

[0130] Step 2, construct the box girder floor of the 0# box girder and install the corrugated steel web:

[0131] Step 2.1, setting up the support on the top of the pier, and then preloading the support. In this embodiment, the purpose of the preloading of the support is to...

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Abstract

The invention provides a corrugated steel web PC box girder, an inner supporting and outer pulling device and a construction method of supporting at first and lining next. The corrugated steel web PC box girder comprises a transverse supporting plate, wherein a right supporting and pulling mechanism and a left supporting and pulling mechanism are installed on the two transverse sides of the transverse supporting plate in a turnover mode respectively, the right supporting and pulling mechanism and the left supporting and pulling mechanism are oppositely arranged and are the same in structure, a plurality of adjustable supporting rods are arranged above the transverse supporting plate and installed between the right supporting and pulling mechanism and the left supporting and pulling mechanism, and a vertical supporting mechanism is mounted on the bottom surface of the transverse supporting plate. According to the construction method, the corrugated steel webs are supported through the foldable inner supporting and outer pulling device, and lining concrete is poured after prestressed tendons of a top plate and a bottom plate are tensioned to meet certain requirements. According to the inner supporting and outer pulling device of the corrugated steel web PC box girder, a corrugated steel web is effectively prevented from inclining inwards and turning outwards, and therefore, construction safety is guaranteed; and according to the construction method of supporting at first and lining next, the introduction degree of prestress can be remarkably improved, and then overall structural performance is improved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and relates to the construction of a PC box girder with a corrugated steel web, in particular to a PC box girder with a corrugated steel web, an inner brace and an outer pull device, and a construction method for bracing first and then lining. Background technique [0002] The corrugated steel web box girder is composed of upper and lower concrete flange plates and corrugated steel webs on both sides. The corrugated steel web replaces the concrete web to participate in the structural force, does not resist the axial force, and reduces the loss of prestress , can effectively reduce the weight of the beam body, has excellent performance in structural stress, and has the characteristics of convenient construction and reduced use of formwork and brackets. In recent years, it has been applied on some bridges in China. [0003] Corrugated steel web PC box girder mainly has the following ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/04E01D21/00E01D19/00E01D19/02
CPCE01D2/04E01D21/00E01D19/00E01D19/02
Inventor 王晓明白云腾王炳玉录哲元张嘉鼎黄春杨邹杰朱波李国强王一晨任万鹏
Owner CHANGAN UNIV
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