Bridge cantilever box girder construction hanging basket pre-pressing loading device

A cantilever and bridge technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of slow loading time, high cost, high equipment requirements, etc., and achieve the effect of low cost, simple structure and convenient use

Inactive Publication Date: 2013-10-23
CHINA COMM 2ND NAVIGATIONAL BUREAU 3RD ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preloading of the hanging basket adopts placing multiple sand bags or heavy objects on the support frame of the bottom form

Method used

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  • Bridge cantilever box girder construction hanging basket pre-pressing loading device
  • Bridge cantilever box girder construction hanging basket pre-pressing loading device

Examples

Experimental program
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Effect test

Embodiment Construction

[0013] The present invention will be further described below in conjunction with drawings and embodiments.

[0014] This embodiment simulates the downward pressure load of the bridge cantilever box girder to be poured to the bottom form support frame by hanging three water injection suspension buckets under the front lower crossbeam of the support frame of the bottom form. The weight M that must be satisfied after the water filling of the suspension bucket is determined by the following formula, and then the water injection height H of the suspension bucket is determined.

[0015] According to the principle of static moment balance, the following formula can be obtained:

[0016] 3MY=XN ie: M=XN / 3Y,

[0017] Thus it can be obtained: H=1.2×4(M-G) / πD2

[0018] In the formula, N: the weight of the cantilever box girder section of the bridge to be poured that needs to be preloaded (t),

[0019] X: the distance from the anchor center A to the front fulcrum B of the han...

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Abstract

The invention discloses a bridge cantilever box girder construction hanging basket pre-pressing loading device, which comprises a suspended truss, a suspended truss track, a pair of outer sliding girders, an upper cross girder, a suspended truss track movable trolley, a bottom die supporting frame and a plurality of suspended barrels; water is injected into the suspended barrels respectively; the suspended truss is supported against the suspended truss track; the suspended truss track is supported against a cast bridge cantilever box girder section through a plurality of rows of track bearing girders; the bottom die supporting frame comprises a plurality of lower longitudinal girders, and a front lower cross girder and a rear lower cross girder which are fixedly connected with the front and rear ends of the lower longitudinal girders; the two ends of the bottom die supporting frame are suspended below the suspended truss respectively; and the suspended barrels in which the water is injected are suspended below the front lower cross girder. According to the device, the pressing load of the bridge cantilever box girder to be cast on the bottom die supporting frame is simulated by using the water injection suspended barrels suspended below the front lower cross girder, and sectional loading can be flexibly realized; the device is low in use cost and can be repeatedly used, the load simulation test period can be shortened greatly, and the load simulation test cost can be reduced.

Description

technical field [0001] The invention relates to a hanging basket device for a cast-in-place section of a cantilever beam of a bridge, in particular to a device for preloading the hanging basket before construction of the cast-in-place section of a cantilever beam of a bridge, and belongs to the technical field of bridge construction. Background technique [0002] The suspension hanging basket is a construction platform for high-altitude operations when the cantilever box girder on the upper part of the bridge is cast-in-situ. The bottom mold supports the frame, and the two are connected by suspenders. The suspended hanging basket can replace the steel pipe support and large vertical and horizontal transport equipment erected from the ground, and is less affected by harsh environments such as water flow, high piers, and canyons during construction, especially during the construction of flyover bridges. The steel pipe support that cuts off the traffic under the bridge can al...

Claims

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Application Information

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IPC IPC(8): E01D21/10
Inventor 顾亮刘忠友茅兵海鄂国兴
Owner CHINA COMM 2ND NAVIGATIONAL BUREAU 3RD ENG
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