Long-span arch bridge with single-leaf hyperboloid variable cross-section concrete-filled steel tube space truss arch rib

A technology of steel tube concrete and space truss, which is applied in the direction of arch bridges, erection/assembly bridges, bridges, etc. It can solve the problems of increased segmental weight at the vault, decreased stability of the arch bridge structure, and difficulties in hoisting and construction of the arch bridge, and achieves hoisting weight reduction. , improve the force condition, and the effect of beautiful appearance

Pending Publication Date: 2019-06-18
江苏交通工程咨询监理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the span of the traditional concrete-filled steel tube arch bridge with constant section increases, the self-weight of the arch bridge continues to increase, especially the self-weight of the mid-span part, which is unfavorable to the force of the arch bridge, is too large, resulting in a substantial increase in the internal force of the structure, resulting in a significant decline in the structural stability of the arch bridge. Increased segmental weight at the vault leads to difficulties in hoisting a

Method used

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  • Long-span arch bridge with single-leaf hyperboloid variable cross-section concrete-filled steel tube space truss arch rib
  • Long-span arch bridge with single-leaf hyperboloid variable cross-section concrete-filled steel tube space truss arch rib
  • Long-span arch bridge with single-leaf hyperboloid variable cross-section concrete-filled steel tube space truss arch rib

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Effect test

Embodiment 1

[0053] A super-long-span arch bridge with single-leaf hyperboloid variable-section concrete-filled steel pipe space truss arch ribs of the present invention consists of limb space truss arch ribs 1, arch bridge foundation 2, K-shaped wind braces 3, slings 4, columns 5 and bridge The noodle system consists of 6 components. A limb space truss arch rib 1 is arranged on the left and right sides of the super-long-span arch bridge, and each limb space truss arch rib 1 includes four single-leaf hyperboloid variable-section steel pipe concrete arch ribs 11 in the shape of a basket arch. In the left and right oblique planes of the arch rib 1 of the limb space truss in the shape of a basket arch, the segment from the arch foot to the 1 / 4 section, the corrugated steel web 12 is set between the upper and lower chords, and the section from the 1 / 4 section to the arch In the segment of the top, steel pipe diagonal rods 13 are arranged on the abdomen between the upper and lower chords. The ...

Embodiment 2

[0057] The construction method of the ultra-large-span arch bridge of the single-leaf hyperboloid variable-section concrete-filled steel tube space truss arch rib of the present invention comprises the following steps:

[0058] Step 1: According to the geological topography, landform conditions and navigation requirements, select the bridge site for the ultra-long-span concrete-filled steel tube arch bridge, excavate the foundation pit, and construct the arch bridge foundation 2.

[0059] Step 2: In the prefabrication processing plant, determine the centroid line position of each single-leaf hyperboloid arched steel pipe arch 11 of the limb space truss arch rib 1, divide the number of hoisting segments, and unload fan-shaped steel plates. The barrel machine rolls the fan-shaped steel plate into a conical steel pipe segment, and uses pyrotechnic bending to form a conical steel pipe bending segment. Multiple conical steel pipe bending segments are assembled into a single-leaf hyp...

Embodiment 3

[0066] A 1,000-meter super-long-span highway bridge in a canyon in the southwest, the design scheme of the super-long-span arch bridge adopts the single-leaf hyperboloid variable-section steel pipe concrete space truss arch rib, the design load is the first-class highway, and the bridge deck width is 32 meters (left sidewalk 2 meters + carriageway 28 meters + right sidewalk 2 meters), the boom spacing is 25 meters, the rise-span ratio is 1 / 4, the arch bridge rise height is 250 meters, and the arch axis coefficient is 1.75. A limb space truss arch rib, the limb space truss arch rib is formed by two oblique arch trusses leaning towards each other to form a basket arch shape.

[0067] The cross-section height of the arch rib of the limb space truss is 15 meters, and the height of the cross-section at the foot of the arch is 30 meters. The distance between the arch feet of the arch trusses is 30 meters, the lateral inclination angle between the two planar arch trusses is 3.5°, and...

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Abstract

The invention provides a long-span arch bridge with a single-leaf hyperboloid variable cross-section concrete-filled steel tube space truss arch rib. The long-span arch bridge with the single-leaf hyperboloid variable cross-section concrete-filled steel tube space truss arch rib is characterized in that a traditional equal cross-section arched steel tube arch limb is reformed into a single-leaf hyperboloid variable cross-section arched steel tube arch limb, and a four-limb space truss arch ribs is basket-shaped. The long-span arch bridge with the single-leaf hyperboloid variable cross-sectionconcrete-filled steel tube space truss arch rib has the advantages of reducing cross-section size at the vault, increasing cross-section size at the arch foot, meeting the mechanical characteristics of an arch bridge structure of large axial force at the arch foot and small axial force at the arch top, effectively reducing the center of mass and stiffness center of the arch bridge structure, improving the stability of a super-long span concrete filled steel tube arch bridge, reducing lifting construction weight of a mid-span vault segment and effectively lowering risk difficulty of construction lifting with multiple curved conical steel tube segments welded and assembled into the single-leaf hyperboloid variable cross-section steel tube arch limb, and improving the mechanical performance of the super-long span arch bridge, and allowing a super-long-span concrete filled steel tube arch bridge with 1000-meter span to be constructed with the single-leaf hyperboloid variable cross-sectionarched steel tube arch limb to construct the four-limb space truss arch rib to further construct the concrete-filled steel tube arch bridge.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and relates to a construction technology of a super-long-span concrete-filled steel pipe arch bridge, in particular to a super-long-span arch bridge with single-leaf hyperboloid variable-section steel pipe concrete space truss arch ribs. Background technique [0002] The concrete-filled steel tube arch bridge has a beautiful shape, and solves the two major problems of the application of high-strength materials and the external formwork of the arch bridge. The large-span concrete-filled steel tube arch bridge has the advantages of low cost, fast construction, low maintenance costs, and good seismic performance. are widely used in. [0003] With the increase of the span of the traditional concrete-filled steel tube arch bridge with equal cross-section, the self-weight of the arch bridge continues to increase, especially the self-weight of the mid-span part, which is unfavorable to the force of the...

Claims

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Application Information

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IPC IPC(8): E01D4/00E01D19/00E01D21/00
Inventor 徐金法
Owner 江苏交通工程咨询监理有限公司
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