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First-arch-then-beam concrete steel skeleton constructing process for through arch bridge with mooring post of steel pipe concrete

A technology of concrete filled steel tube and tied arch bridge, which is applied in the direction of bridges, arch bridges, bridge construction, etc., can solve the problems of large influence on river navigation, long construction period and cost of engineering.

Inactive Publication Date: 2006-08-02
SHANGHAI NO 7 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this construction method consumes a lot of engineering cost, long construction period, and has a great impact on river navigation. During the entire hoisting period of the steel arch rib, the river channel needs to be closed

Method used

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  • First-arch-then-beam concrete steel skeleton constructing process for through arch bridge with mooring post of steel pipe concrete
  • First-arch-then-beam concrete steel skeleton constructing process for through arch bridge with mooring post of steel pipe concrete
  • First-arch-then-beam concrete steel skeleton constructing process for through arch bridge with mooring post of steel pipe concrete

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Experimental program
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Effect test

Embodiment Construction

[0020] The under-supported concrete-filled steel tube tied arch bridge adopts the stiff skeleton construction method of arch first and then girder, first longitudinal girder and then cross girder. The specific construction process is as follows:

[0021] Step 1: (see figure 1 , figure 2 )

[0022] 1. Construction of the main bridge pier 1 bored piles, caps and columns;

[0023] 2. Set up support 12 at arch foot 2 and end beam 3 of the pier of the main bridge, and construct the concrete structure of arch foot and end beam;

[0024] 3. After the concrete of the arch foot and the end beam reaches the design strength, tension the horizontal prestressed steel cable 4 of the end beam.

[0025] Step two: (see figure 2 , image 3 )

[0026] 1. The prefabricated steel pipe arch rib 5 is inspected and shipped, and transported to the construction site in sections;

[0027] 2. The steel pipe arch ribs are assembled and formed on the construction site, and are hoisted into place ...

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Abstract

The first-arch-then-beam concrete steel skeleton constructing process for through arch bridge with mooring post of steel pipe concrete includes the following steps: A. tensing permanent horizontal pre-stressed steel cable at the end cross beam; B. assembling steel pipe arch rib, floating and conveying the steel pipe arch rib and hoisting with floating crane to the site; C. controlling the displacement of abutment by using the permanent pre-stressed steel cable temporarily as the constructing pulling cable and regulating the tensing stress of the horizontal pre-stressed steel cable to bear the horizontal pushing force of the steel pipe concrete arch bridge; and D. hoisting bridge surface pre-stressed beam to site with the steel pipe concrete arch rib and suspender. Compared with conventional construction process, the present invention has fast construction speed, low cost, reduced overhead welding work load and high construction quality.

Description

technical field [0001] The invention relates to a construction method of an under-supported steel pipe concrete tied arch bridge, in particular to a construction method using an arch first and then a beam stiff skeleton. Background technique [0002] With the increasing prosperity of our country's economy and the continuous improvement of the expressway network, in order to meet the requirements of river navigation capacity, many super-large bridges with a span of more than 50m in my country currently adopt the form of a bridge across the river, and the concrete-filled steel tube arch bridge is the current bridge in my country. A hot spot in construction, it can better solve many contradictions in the construction of bridges, such as low material consumption, light installation weight, simple construction, and large load-bearing capacity. It is an ideal structural form of long-span arch bridges. Following the principles of practical, economical, safe and beautiful four bridge...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D4/00
Inventor 王美华朱王怡吴杏弟费春
Owner SHANGHAI NO 7 CONSTR
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