Large-span steel arch frame

A steel arch frame and large-span technology, applied in arch bridges, erection/assembly bridges, bridge materials, etc., can solve the problems of poor adjustment accuracy and achieve good adjustment accuracy, good visibility, and high accuracy

Pending Publication Date: 2019-08-09
CHONGQING BIAOWANG MACHINERY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, although the steel arch frame can adjust the rise-span ratio of steel arch bridges to a certain extent, it is only suitable for the construction of arch bridges with a span of less than 150 meters, and the adjustment accuracy is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A long-span steel arch frame, which is mainly composed of arch foot segments, standard segments, adjustment segments, closing segments and closing devices. In addition to the closing devices, the lower chords of adjacent segments are connected by pin-type hinges , the upper chords of the adjacent segments are connected by chords with multi-sided bolts to form an arch frame.

[0035] Furthermore, wedges are arranged between the transverse end faces of the upper chords of adjacent segments to realize the adjustment of the arc of the arch and meet the arc requirements of the constructed reinforced concrete main arch.

[0036] In order to improve the stability of the steel arch, the above-mentioned wedges are limited axially and radially between the transverse end surfaces of adjacent segments.

[0037] In order to further improve the stability of the steel arch, the above-mentioned wedge fits with the installation hole through the cone and is axially and radially limited b...

Embodiment 2

[0042] A long-span steel arch, such as Figure 1 to Figure 11 As shown, it is mainly composed of arch foot segment 18, standard segment 15, adjustment segment 16, closing segment 17 and closing device 8; except for closing device 8, the lower chords 2 of all adjacent segments adopt the pin-through type Hinged connection, in this example, a hinged assembly 4 is provided at the transverse section of the lower chord 2, and a through hole is provided on the hinged assembly 4, and pins are inserted in the through hole to realize the hinged connection of the lower chord of adjacent segments. The upper chord 1 of the adjacent segment is connected by chord multi-side bolted to form an arch frame. In this example, a plurality of connecting bolt fixing seats 21 are arranged on the side of the end of the upper chord 1, and the connecting bolts of the adjacent segment Locking bolts 22 are pierced on the fixing seat 21 to realize the multi-side bolted double-pull connection of the chords. ...

Embodiment 3

[0067] A long-span steel arch frame, refer to Example 2. Among them, the truncated cone is a truncated cone fixed in the middle of the upper chord transverse end face of the segment, the installation hole is a circular hole set in the middle of the upper chord transverse end face of the segment, the wedge is set on the truncated cone, and the truncated cone can be inserted into the circular hole A small gap fit of 1-3mm is formed to realize the axial and radial limit of the wedge.

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Abstract

The invention provides a large-span steel arch frame. The large-span steel arch frame is mainly composed of arch foot segments, standard segments, adjusting segments, closing segments and closing devices in an assembled mode, except the closing devices, lower chords of the adjacent segments are in hinged connection through penetrating pins, and upper chords of the adjacent segments are in opposite-pulling connection through bolts on the multiple side faces of chord members, so that the arch frame is formed; and wedge blocks are arranged between the transverse end faces of the upper chords of the adjacent segments, and the wedge blocks are axially and radially limited between the transverse end faces of the adjacent segments. The large-span steel arch frame is adjustable in rise span ratio,adjustable in span and especially suitable for construction of a main arch ring of a cast-in-place reinforced concrete arch bridge with the span being greater than 150 meters; and the rise span ratioand the span of the large-span steel arch frame are adjusted ingeniously, the force transfer effect is good, stability is good, and the force transfer effect is quite excellent.

Description

technical field [0001] The invention relates to a long-span steel arch frame, which is used for the construction of the main arch ring of cast-in-situ reinforced concrete arch bridges with a span of more than 150 meters. Background technique [0002] During the construction of the arch bridge, the steel arch frame, as the most important equipment measure in the whole construction process, is an indispensable technological equipment to realize the overall cast-in-place construction of the reinforced concrete main arch ring, and has the advantages of safety, speed, economy, and environmental protection. During construction, the steel arch is installed first, and then the bridge body / arch is poured with the steel arch as the supporting body, and the steel arch is removed when the strength of the bridge / arch body meets the requirements. [0003] The existing steel arch frame is mainly composed of arch foot segments, standard segments, adjustment segments and closing segments. Am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D4/00E01D21/00E01D101/30
CPCE01D4/00E01D21/00E01D2101/30
Inventor 王华才张有德杨娴贺之萱王沁薰
Owner CHONGQING BIAOWANG MACHINERY EQUIP CO LTD
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