Method for dismantling arch bridge for protection

A protective arch bridge technology, applied in the field of protective demolition of arch bridges, can solve the problems of unsystematic and perfect demolition methods, lack of engineering practice experience in large-scale water arch bridges, etc., and achieve the effects of short construction period, high safety and clear structural stress

Inactive Publication Date: 2008-09-17
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Currently, there is no specific guidance and experience in the demolition of bridges, especially the demolition of large-scale water arch bridges lacks engineering practice experience, and the demolition method is still very poor Systematic, perfect, in its infancy

Method used

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  • Method for dismantling arch bridge for protection
  • Method for dismantling arch bridge for protection
  • Method for dismantling arch bridge for protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] 1. Design and construction of high trestle bridge:

[0033] In addition to carrying the gantry crane running rails and sidewalks, the high trestle bridge also has under-arch support beams between the upstream and downstream for under-arch support.

[0034] Such as figure 2 As shown, the trestle bridge is arranged upstream and downstream of the old bridge, with 21 spans both upstream and downstream. The trestle bridge is composed of six rows of reinforced Bailey beams on a single layer (the 2 holes on the east bank are I-shaped steel beams). In addition to laying the gantry crane running rails, there are also 0.85m wide sidewalks, which are also used as the original optical cables of the old bridge and temporary communication channels. And the concrete pump pipe channel during the construction of the new bridge.

[0035] 1. The construction method of the temporary buttress of the trestle bridge:

[0036] (1) The pier is located at the buttress

[0037] After the temp...

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PUM

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Abstract

The invention provides a protective method for removing an arch bridge, which belongs to the technology field of bridge removal. The method aims to provide a protective bridge removal method with safety, high efficiency and no pollution. The technical points include: building up a new trestle, erecting a gantry crane, carrying out the bridge removal in a reverse order of the bridge building including bridge decking, coping, column, beam, arch rib and arch support in sequence. The removal stage of the arch rib especially includes removing by adopting methods of top-supporting under the arch, arch box transverse stop and horizontal restraining rope, which better solves the difficult problem of the protective bridge removal with safety, high efficiency and no pollution in a complex construction environment of guaranteeing under-arch navigation, high security level, short construction period and various unpredictable elements, manages to meet the design requirements of the removal safety factor in the protective bridge removal process and the limit control under various removal working conditions and guarantees the removal quality and the construction safety. The removal method has low cost and remarkable social benefit reflected in the direct economic analysis, which is a protective removal method of large-span bridges with safety, high efficiency and practicability.

Description

technical field [0001] The invention relates to a method for demolishing a bridge, in particular to a method for protectively demolishing an arch bridge. Background technique [0002] Liuzhou Jinglan Bridge (see Figure 1) was completed in 1992, with a bridge deck width of 16.5m. The main bridge is a catenary reinforced concrete double-rib arch bridge with 5 spans and 90m equal cross-section, with a rise-to-span ratio of 1 / 8 and an arch axis coefficient of 1.756. The width of the arch rib is 2.14m, the height is 1.7m, the center distance of the rib is 8m, there are 14 transverse beams between the ribs, and each arch rib is composed of two prefabricated arch boxes. Each prefabricated arch box is 1.04m wide and 1.6m high, and each span is prefabricated and installed in three sections. The arch is composed of vertical columns and cover beams, and reinforced concrete hollow slabs and channel slabs are placed vertically. The substructure consists of gravity piers, U-shaped abut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D24/00
Inventor 唐俊胡永刘明友姚松柏王江红冯海珍赵大昭李飞
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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