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Comprehensive pre-pressing method and device for tied-arch bridge cross beam suspension construction beam lattice system

A beam-lattice system and tie-arch bridge technology, applied in bridges, arch bridges, bridge forms, etc., can solve problems such as the inability to use step-by-step preloading, easy to be restricted by traffic conditions or other environmental conditions under the bridge, and achieve heap load stable effect

Pending Publication Date: 2021-04-09
THE 3RD ENG CO LTD OF CHINA RAILWAY 16TH BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional step-by-step preloading method is suitable for beam-by-beam preloading when both beams and tie beams have floor supports.
However, when the traffic conditions or other environmental conditions under the bridge cannot be used as the lower beam support, and the beam construction can only be carried out by hanging on the tie beam or assembling construction, the traditional step-by-step preloading method cannot be used.
Therefore, the traditional step-by-step preloading method is easily limited by traffic conditions or other environmental conditions under the bridge

Method used

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  • Comprehensive pre-pressing method and device for tied-arch bridge cross beam suspension construction beam lattice system
  • Comprehensive pre-pressing method and device for tied-arch bridge cross beam suspension construction beam lattice system

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Embodiment 1

[0023] Such as figure 1 and 2 As shown, the embodiment of the present invention provides a comprehensive preloading method for the beam lattice system of the beam suspension construction of the tied arch bridge, comprising the following steps:

[0024] Step 10: Divide the tie girder of the tied arch bridge into several comprehensive preloaded blocks along the direction of the bridge, and stack preloaded blocks on the tie beams in each comprehensive preloaded block to form a stack of preloaded blocks .

[0025] The tie beam is composed of several tie beam supports. In order to facilitate the stacking of preloaded blocks on the tie beam, the tie beam is first divided into several comprehensive preload blocks along the direction of the bridge. In each comprehensive preload area On the tie beams in the block, the preloaded blocks are equivalently stacked according to the corresponding load or the preloaded blocks are stacked overloaded according to the specifications. The code ...

Embodiment 2

[0034] The present invention also provides a comprehensive preloading device for the beam lattice system of the beam suspension construction of the tied arch bridge, such as figure 2 As shown, it includes the bracket, the tie beam on the bracket, the pre-compression block and the Bailey beam installed on the pre-compression block stack. The tie beam is divided into several comprehensive pre-compression blocks along the direction of the bridge. The pre-compression block The stack of briquetting blocks is formed by a number of pre-compressing blocks stacked on the tie beam in each comprehensive pre-compressing block; pre-compressing blocks corresponding to the corresponding load of the beam are also installed on the Bailey beam.

[0035] Preferably, the pre-compacted block is a concrete cube pre-compacted block.

[0036] Preferably, the volume of the concrete cube pre-pressed block is 1m 3 .

[0037] The embodiment of the present invention corresponds to the above-mentioned c...

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Abstract

The invention belongs to the field of bridge construction, and provides a comprehensive pre-pressing method and device for a tied-arch bridge cross beam suspension construction beam lattice system, wherein the comprehensive pre-pressing method mainly comprises the steps: dividing a tie bar beam into a plurality of comprehensive pre-pressing blocks along the bridge direction; stacking concrete cubic pre-pressing blocks on the tie bar beam in each comprehensive pre-pressing block according to corresponding bearing load equivalence or standard requirements in an overload mode, and forming a pre-pressing block stack; mounting a bailey beam on the pre-pressing block stack, and mounting a pre-pressing block corresponding to the corresponding load of the cross beam on the bailey beam; and disassembling reversely all the pre-pressing blocks. The concrete cubic pre-pressing block is adopted as a pre-pressing material, the working conditions of small component section and large pre-pressing load can be met, pile loading is stable, the volume weight of the material is close to the volume weight of an entity to the maximum extent, the advantage of being close to the actual construction condition to the maximum extent is achieved, and stability and reliability are achieved.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a method and a device for comprehensive preloading of a beam-lattice system for suspension construction of beams of a tie-bar arch bridge. Background technique [0002] Girder system tied arch bridge is a kind of bridge construction widely used in the field of traffic engineering. The beam system is usually composed of tie beams on both sides, end beams and several beams evenly distributed in the middle. The beam system has tie beams and middle beams A feature in which the member cross-sections are all small. [0003] The construction sequence of the beam-lattice system is usually to construct the tie beam first, and then construct the beam. According to the relevant construction specifications and construction safety requirements of construction projects, the cast-in-place concrete structure needs to preload the bracket before construction to eliminate the inelastic deformatio...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D4/00
CPCE01D21/00E01D4/00
Inventor 段新鸽邵成猛王凤喜金仁贵周通杨强施红斌
Owner THE 3RD ENG CO LTD OF CHINA RAILWAY 16TH BUREAU GRP CO LTD
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