Mountainous area wind-cable-free double-rib hoisting large-span steel pipe arch section construction method

A technology that spans steel pipes and arch segments, which is applied in the construction method of double-rib hoisting large-span steel pipe arch segments without wind cables in mountainous areas. The effect of stability and high control precision

Inactive Publication Date: 2017-01-04
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the terrain is complex, there is no water transport condition, no land transport condition for the entire segment, the traditional steel pipe arch rib cannot be used to install the wind cable, and there is no suitable assembly site at the bridge site, other methods of construction are required

Method used

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  • Mountainous area wind-cable-free double-rib hoisting large-span steel pipe arch section construction method
  • Mountainous area wind-cable-free double-rib hoisting large-span steel pipe arch section construction method
  • Mountainous area wind-cable-free double-rib hoisting large-span steel pipe arch section construction method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the construction method for hoisting the large-span steel pipe arch section of the double-rib hoisting of the windless cable in the mountainous area of ​​the present invention comprises the following steps:

[0027] a. Construction preparation, complete the installation of hoisting system and preparation of construction materials;

[0028] b. Segmental three-dimensional assembly, through the use of the hoisting system, the steel pipe arch ribs are three-dimensionally assembled in four segments;

[0029] c. After the 4-segment three-dimensional assembly of steel pipe arch ribs is completed, fine lifting, alignment and bolting are carried out;

[0030] d. Tension and fixation of the bolted steel pipe arch rib 4-section buckle cable through the cable-stayed buckle-hanging system;

[0031] e. Repeat steps b to d to complete the assembly of all 4 segments of steel pipe arch ribs;

[0032] f. Closing and shackle. When all 4 sections of the steel ...

Embodiment 2

[0036] Such as image 3 As shown, preferably, in the step a, the hoisting system includes a towerless cable crane, which includes a traction cable, a hoisting cable, a chain stay cable system, a hoisting sports car and a corresponding The hoist is convenient for transporting the steel pipe arch rib 4 and the bridge deck 15 and the like. During construction, the steel pipe arch rib 4 is hoisted at first, and then the arch upper column 11 is installed on the upper surface of the steel pipe arch rib 4, and the top of the arch upper column 11 is connected with a steel box cover beam 14. A bridge deck 15 is installed on the top of the box cover girder 14 .

Embodiment 3

[0038] As a preference, in the step b, when assembling the nth segment steel pipe arch rib 4, install the lower chord and the cross-link members between them, the middle lower cross brace and the web; two adjacent webs are temporarily connected Fix, pull the cable wind or add support to prevent it from toppling; then install the diagonal brace of the steel pipe arch rib 4 of the nth section, and bolt the gusset plate connected with the upper chord to the upper end of the diagonal brace; place the steel pipe arch rib 4 of the nth section The upper chords of the ribs 4 and the cross-link members between them are assembled on the bridge deck between the two steel pipe arch ribs 4, and then installed in the designed position.

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PUM

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Abstract

The invention discloses a mountainous area wind-cable-free double-rib hoisting large-span steel pipe arch section construction method. The method includes steps of construction preparation, section three-dimensional assembling and hoisting, alignment and bolting, cable-stayed fastening system buckle cable tensioning, closing and buckle removing. The method has the advantages of being simple in step and suitable for places with complex terrain and without water transport conditions and whole section land transport conditions. An approach bridge is utilized for three-dimensional assembling, and bolting and welding are combined, so that structural size is controlled effectively. A tower-free cable crane is adopted for arch rib section mounting, so that alignment is quick, safe and reliable. A novel cable-stayed fastening system is adopted, so that structural stability before and after closing is ensured. Axis adjusting is realized by means of double-rib mounting, single-rib adjusting and gasket adding under wind-cable-free conditions. Symmetric suspended assembling and dynamic instant closing are adopted, so that arch rib line type control accuracy is high, and construction operation is convenient.

Description

technical field [0001] The invention relates to building construction, in particular to a construction method mainly used in mountainous areas with complex terrain, no conditions for water transportation, and no conditions for whole-stage land transportation. Background technique [0002] In the construction of bridges, for places with good terrain environment, the construction can be carried out by means of overall transportation and hoisting of segments. For those with water transportation conditions, it can be directly transported by boat, and then hoisted and installed segments, which is convenient for construction. However, if the terrain is complex, there is no water transport condition, no land transport condition for the entire segment, the wind cable cannot be installed with the traditional steel pipe arch rib, and there is no suitable assembly site at the bridge site, other methods of construction are required. Contents of the invention [0003] The object of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10E01D4/00E01D101/30
CPCE01D21/10E01D4/00E01D2101/30
Inventor 苏春生张新柳徐少平饶胜斌何十美梁朋刚孙百锋郝玉峰汤振亚
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP
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