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Prestressing force concrete series rob arch bridge inverted sequence dismounting method

A tie-bar arch bridge and prestressing technology, which is applied in building maintenance, construction, building construction, etc., can solve the problem of lack of demolition of such bridges, and achieve high safety and scientific effects

Inactive Publication Date: 2008-07-09
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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Problems solved by technology

At present, there is still a lack of experience in dismantling such bridges in China

Method used

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  • Prestressing force concrete series rob arch bridge inverted sequence dismounting method

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Embodiment Construction

[0029] The Yuncun Bridge on the Changcao Line in Changzhou City is located on Provincial Highway 232 in Jiangsu. It is a prestressed reinforced concrete tie-bar arch bridge. Due to the collapse of the west half of the bridge, the bridge needs to be rebuilt, so it needs to be demolished.

[0030] The research on the demolition and construction technology of tied arch bridge mainly solves the problems of demolition sequence, temporary facilities and construction equipment. The demolition of the tie-bar arch bridge adopts Bailey truss hanger as the support system, mainly uses the floating crane as the lifting equipment, and adopts the advanced concrete steel wire cutting machine.

[0031] Through the research on the stress release and stability control technology in the demolition process of the tied arch bridge, master the process and method of stress calculation and stability calculation, use large-scale calculation software to build models for analysis, and form a complete calc...

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Abstract

The invention discloses an inverted sequence demolition method of a prestressing concrete tied arc bridge, which comprises adopting demolition of bridge deck tied affiliated projects to reduce self weight; erecting tied girders and arc rib supports, releasing prestressing in the tied girders by steps and phases; demolishing prior suspension rods tension in inverted sequence, cutting and demolishing the support between the arc ribs by steps and phases, removing the arc rib racks, demolishing and hanging off the tied girders and inner beams from the middle to both sides by steps and phases, demolishing end beams and other temporary equipment. The method has strong scientific and safety properties.

Description

technical field [0001] The invention belongs to a bridge dismantling method, in particular to a reverse sequence dismantling method of a prestressed concrete tied arch bridge. Background technique [0002] Composite system arch bridge is to form a whole with the traffic system structure and the main arch according to different construction methods, so as to bear the load together, and give full play to the structural characteristics and combination effect of beam bending and arch compression. It can be divided into thrust composite system arch bridge and Arch bridge without thrust combined system. [0003] The main load-bearing components of the composite arch bridge without thrust are arch ribs, tie beams (stiffened longitudinal beams), beams, and suspenders. The tie beams and beams form a plane frame, and the plane frame is connected up and down by suspenders and arch ribs to form a statically determinate structure on the outside. , The interior is a whole of statically i...

Claims

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Application Information

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IPC IPC(8): E01D24/00
Inventor 刘解放秦林牛子民吴曙光刘峰李为强赵中华吴文奇
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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