A steel pipe arch bridge arch rib without support section by section arch method
By using a segmental arch-forming method without supports, and employing lifting and jacking devices to hinge and weld the arch ribs of the steel pipe arch bridge segment by segment, the problem of high construction difficulty for large-span arch bridges with large rises was solved, and construction risks and costs were reduced.
Patent Information
- Application Number
- CN202310874391.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-17
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2043-07-17
AI Technical Summary
Existing methods for constructing arches with arch ribs in steel pipe arch bridges present challenges such as high construction difficulty, high risk, and high cost in the construction of large-span arch bridges with large spans. In particular, traditional methods are limited by the capacity of lifting machinery, the high position of the arch section, the high technical difficulty of rotation or lifting, and the insufficient bearing capacity of temporary piers.
The arch ribs of the steel pipe arch bridge are formed by forming hinged arch rib units in the low-level area, lifting them with a lifting device and simultaneously pushing them with a jacking device, and welding them in sections to form the arch ribs.
It reduces construction difficulty and risk, decreases the amount of support and construction cost, improves construction efficiency, and is suitable for large-span arch bridges with large sag, breaking through the limitations of traditional methods.
Smart Images
Figure CN117144798B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of bridge construction, and more particularly to a steel pipe arch bridge arch rib support-free segmental arching method. BACKGROUND
[0002] Currently, the steel pipe arch bridge arch rib segmental arching methods mainly include: (1) using hoisting machinery to segmentally construct or install arch segments in situ, and using supports or buckling towers to support and fix the closure arching; (2) first low-positionally assembling arch segments, and then rotating or lifting to the installation position to close the arching; and (3) initially arching in a side position and then jacking to the installation position to arch. The three arching methods are widely used in arch bridge construction, are suitable for different technical conditions and environmental conditions, have respective advantages and disadvantages, the in-situ installation method is subject to the lifting capacity of hoisting machinery; compared with the deck arch bridge, the arch segment position of the through arch bridge is high, and the low-position installation, rotation and lifting techniques are more difficult; the side-position initial arching and jacking to the installation position method is subject to the arching difficulty, jacking equipment, bearing capacity and quantity of temporary piers. With the emergence of high-rise and large-span arch bridges in engineering, the above-mentioned disadvantages are more obvious. SUMMARY
[0003] An object of the present application is to solve at least the above problems and to provide at least the advantages to be described later.
[0004] To achieve these objects and other advantages in accordance with the present application, a steel pipe arch bridge arch rib support-free segmental arching method is provided, which comprises the following steps:
[0005] S1, hoisting each arch segment to an installation position, temporarily consolidating two arch segments symmetrically arranged in the transverse direction according to a designed transverse spacing to form an arch rib unit G i ;
[0006] S2, sequentially hinging two adjacent arch rib units G i ; setting a sliding support at the front end of the arch rib unit G1 located at the starting end and hinging with the sliding support;
[0007] S3, moving a lifting device to the rear end of the arch rib unit G i , connecting with the arch rib unit G i , simultaneously setting the sliding supports at the rear ends of the arch rib unit G i and the arch rib unit G i+1 and respectively hinging with the sliding supports, and setting a jacking device at the rear end of the arch rib unit G i+1 ;
[0008] S4, lifting the rear end of the arch rib unit G i to a designed height by the lifting device, and lifting the rear end of the arch rib unit G i+1The front end is then raised; during the raising process, the arch rib unit G is simultaneously pushed by the jacking device. i+1 The backend;
[0009] S5, the arch rib unit G to be described i With arch rib element G i+1 After the hinge reaches the predetermined position, the arch rib unit G will be... i With arch rib element G i+1 The hinge joint is welded and fixed.
[0010] S6. Move the lifting device to the hinge of the next arch rib unit and repeat steps S3 to S5 until the arch rib is formed.
[0011] Preferably, in step S1, two arch sections symmetrically arranged in the transverse direction of the bridge are connected by a transverse connecting rod, which is detachably connected to the two arch sections and is located near the ends of the arch sections.
[0012] Preferably, the transverse connecting rods are provided at both ends of the arch rib unit located at the starting end, and the transverse connecting rods are provided at the rear ends of the remaining arch rib units.
[0013] Preferably, each of the transverse connecting rods is provided with a sliding support at both ends; the sliding support includes a longitudinal track, a slider, and a hinge support, the longitudinal track is fixedly installed at the installation position of the corresponding arch section, the slider is slidably installed on the longitudinal track, the lower end of the hinge support is hinged to the slider, and the upper end of the hinge support is fixedly connected to one end of the transverse connecting rod.
[0014] Preferably, the pushing device is a hydraulic cylinder, the fixed end of which is fixedly connected to the longitudinal moving track, and the movable end of which is fixedly connected to the slider; an electro-hydraulic proportional control valve is provided on the oil circuit of the hydraulic cylinder.
[0015] Preferably, an angle sensor is provided at the hinge joint between the hinge support and the slider.
[0016] Preferably, the lifting device includes a lifting gantry, a sliding rail, and a continuous jack. The sliding rail is fixedly installed at the installation position of the corresponding arch section. The lifting gantry spans across the arch rib unit, and its bottom can move along the sliding rail. The continuous jack is correspondingly installed with the sliding support. The fixed end of the continuous jack is fixedly connected to the lifting gantry, and its movable end is fixedly connected to the slider.
[0017] Preferably, it also includes a transverse connecting rod at the front end of the arch rib unit G1 at the starting end and the arch rib unit G i Steel strand J is installed between the horizontal connecting rods at the rear end. iIn step S5, the arch rib unit G is... i With arch rib element G i+1 After welding and fixing, tension the steel strand J i , making the arch rib unit G i Together with the already installed arch rib units, they form an integral arch segment.
[0018] Preferably, the steel strand J i Two strands are configured and symmetrically arranged on both sides of the crossbeam connecting rod; during tensioning, the steel strands J on both sides... i Synchronous tensioning.
[0019] The present invention has at least the following beneficial effects:
[0020] The present invention provides a method for constructing arch ribs of steel pipe arch bridges without supports, which involves first forming multiple arch rib units that are sequentially hinged together longitudinally in the low-level region, and then slowly lifting the arch rib unit G using a lifting device. i With arch rib element G i+1 At the hinge, the arch rib unit G is simultaneously pushed by the jacking device. i+1 The rear end of the arch rib unit G i Once the design position is reached, the two arch rib units are welded and fixed, and the above steps are repeated until the arch ribs are formed. By breaking down the entire structure into smaller parts, the installation height of the arch sections is indirectly reduced, thus lowering the construction difficulty and risk. At the same time, the reduced number of supports and the use of relatively low lifting devices that can also accommodate arch section installation lower the construction cost during the arch formation stage. Furthermore, this overcomes many limitations of traditional arch formation methods for large-span arch bridges with large spans and high arches, and can be used alone or in conjunction with other arch formation methods.
[0021] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description
[0022] Figure 1 The lifting arch rib unit G in the method described in this invention i A schematic diagram of the structure at that time;
[0023] Figure 2 This is a top view of the transverse connecting rod described in this invention;
[0024] Figure 3 This is a schematic diagram of the arch-forming process of the arch rib in the method described in this invention;
[0025] Figure 4 This is a schematic diagram of the structure of the sliding support described in this invention;
[0026] Figure 5 This is a schematic diagram of the lifting device described in this invention; Detailed Implementation
[0027] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.
[0028] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0029] like Figures 1 to 5 As shown, the present invention provides a method for constructing a steel pipe arch bridge arch rib segmentally without support, comprising the following steps:
[0030] S1. Hoist each arch section to the installation position, and temporarily fix the two arch sections 10 that are symmetrically arranged in the transverse direction of the bridge to form an arch rib unit G according to the designed transverse spacing. i 2;
[0031] S2, sequentially connect two adjacent arch rib units G i 2 are hinged together; a sliding support 6 is provided at the front end of the arch rib unit G1 located at the starting end and is hinged to the sliding support 6.
[0032] S3. Move the lifting device 3 to the rear end of the arch rib unit Gi2 and connect it to the arch rib unit Gi2. At the same time, in the arch rib unit Gi2... i 2 and arch rib unit G i+1 The rear end of 4 is provided with the sliding support 6, and is hinged to the sliding support 6 respectively, in the arch rib unit G i+1 A jacking device is installed at the rear end of 4;
[0033] S4, The arch rib unit G is lifted by the lifting device 3. i From the rear end of 2 to the design height, arch rib unit G i+1 The front end of 4 is then raised; during the raising process, the arch rib unit G is simultaneously pushed by the jacking device 9. i+1 The backend of 4;
[0034] S5, the arch rib unit G to be described i 2 and arch rib element G i+1 After the hinge of 4 reaches the predetermined position, the arch rib unit G is placed. i2 and arch rib element G i+1 4. The hinge joint is welded and fixed.
[0035] S6. Move the lifting device 3 to the hinge of the next arch rib unit, and repeat steps S3 to S5 until the arch rib is formed.
[0036] In this technical solution, the first step is to prepare for the arch rib construction by installing the lifting device 3 in place; then, measurements are taken and lines are laid out, and each arch section is hoisted to its predetermined position using conventional lifting equipment, such as... Figure 2 As shown, in the low-lying region, two arch sections 10 symmetrically arranged in the transverse direction of the bridge are temporarily consolidated at the designed transverse spacing to form an arch rib unit G. i 2; then G between each arch rib unit i 2. A longitudinal hinged connection is made via a hinge shaft; or the arch section 10 is first longitudinally hinged at the lower position, and then the two arch sections 10 arranged symmetrically in the transverse direction are temporarily fixed together. For example... Figure 3 As shown, the lifting device 3 is moved to the arch rib unit G to be installed. i 2's rear end, and slowly raise the arch rib unit G i 2 and arch rib element G i+1 4. Hinged joint; simultaneously, the aforementioned jacking device 9 jacks the arch rib unit G. i+1 The rear end of 4 drives the arch rib unit G. i+1 4. Move forward, and then adjust the arch rib unit G. i The deflection angle of 2 is adjusted so that the arc formed between the two meets the setting requirements. Then, the two arch rib units are welded and fixed, and the lifting device is moved to the arch rib unit G. i+1 4 and arch rib element G i+2 At the hinge joints, repeat the above steps until all arch rib units are assembled. It should be noted that the front and rear ends mentioned here are based on the arching direction of each arch rib unit; the end that is arched first is the front end, and the other end is the rear end. This arching method indirectly reduces the installation height of arch sections by breaking the process down into smaller parts, thus reducing construction difficulty and risk. Simultaneously, by reducing the amount of support used and employing a relatively low lifting device that can also accommodate arch section installation, the construction cost during the arching stage is reduced. Furthermore, it overcomes many limitations of traditional arching methods for large-span arch bridges with high arches, and can be used alone or simultaneously with other arching methods.
[0037] Specifically, in step S1, such as Figure 2As shown, two arch sections 10 symmetrically arranged in the transverse direction of the bridge are connected by a transverse connecting rod 5. The transverse connecting rod 5 is detachably connected to the two arch sections 10 and is located near the ends of the arch sections 10. The two arch sections 10 symmetrically arranged in the transverse direction of the bridge are temporarily fixed together by the transverse connecting rod 5 according to the designed transverse spacing. Specifically, the transverse connecting rod 5 is located at both ends of the arch rib unit G1 at the starting end, and the remaining arch rib units G... i The rear end is provided with the horizontal connecting rod 5.
[0038] In another embodiment, each of the transverse connecting rods 5 is provided with a sliding support 6 at both ends; see reference Figure 4 The sliding support 6 includes a longitudinal track 61, a slider 62, and a hinge support 63. The longitudinal track 61 is fixedly installed at the corresponding installation position of the arch section 10. The slider 62 is slidably mounted on the longitudinal track 61. The lower end of the hinge support 63 is hinged to the slider 62, and the upper end of the hinge support 63 is fixedly connected to one end of the transverse connecting rod 5. The hinge support 63 enables the hinge connection between the end of the arch rib unit and the sliding support 6.
[0039] In another embodiment, the pushing device 9 is a hydraulic cylinder. The fixed end of the hydraulic cylinder is fixedly connected to the longitudinal transfer track 61, and its movable end is fixedly connected to the slider 62. An electro-hydraulic proportional control valve is provided on the hydraulic circuit of the hydraulic cylinder. The longitudinal transfer track 61 is arranged along the longitudinal direction of the arch rib. The hydraulic cylinder pushes the slider 62 to move along the longitudinal transfer track 61, thereby driving the arch rib unit G. i move.
[0040] Furthermore, an angle sensor is provided at the hinge joint between the hinge support 63 and the slider 62.
[0041] The lifting device 3 includes a lifting gantry 31, a sliding rail 33, and continuous jacks 32. The sliding rail 33 is fixedly installed at the corresponding arch section 10. The lifting gantry 31 spans above the arch rib unit, and its bottom can move along the sliding rail 33. The continuous jacks 32 are correspondingly arranged with the sliding supports 6. The fixed end of the continuous jacks 32 is fixedly connected to the lifting gantry 31, and its movable end is fixedly connected to the slider 62. It is understood that there are two sliding rails 33 corresponding to the bottom of the lifting gantry 31. The lifting gantry 31 can move along the sliding rails 33 using conventional methods in the prior art, which are not limited here. Since the continuous jacks 32 are correspondingly arranged with the sliding supports 6, there are two continuous jacks 32 on the lifting gantry 31 corresponding to the sliding supports 6 at both ends of the transverse connecting rod 5.
[0042] When the lifting device 3 moves to the arch rib unit G i When the rear end of 2 is reached, the movable end of the continuous jack 32 is connected to the corresponding slider 62, and the continuous jacks 32 on both sides simultaneously lift the arch rib unit G. i 2. At this point, the slider 62 separates from the corresponding longitudinal track 61. During the lifting process, the angle sensor is used to monitor the corresponding arch rib unit G. i The deflection angle of 2 is converted into an electrical signal, which is then used to control the amount of oil entering the hydraulic cylinder via the electro-hydraulic proportional control, driving the hydraulic cylinder to push the arch rib unit G. i+1 The rear end of 4, thus ensuring the arch rib unit G i The deflection angle of element 2 is within the control range and is stably raised to the design position, thereby enabling the arch rib element G to... i 2 and arch rib element G i+1 The arc formed between 4 meets the setting requirements.
[0043] In another embodiment, a transverse connecting rod 5 at the front end of the arch rib unit G1 at the starting end and the arch rib unit G1 are also included. i Steel strand J is installed between the horizontal connecting rods 5 at the rear end. i 8; In step S5, the arch rib unit G is... i 2 and arch rib element G i+1 After welding and fixing between 4, tension the steel strand J. i 8. Make the arch rib unit G i With the already installed arch rib units, namely arch rib unit G1 to arch rib unit G i-1 This forms an arch segment 1. Furthermore, to ensure tensioning effect and stability, the steel strand J... i 8 is configured as two strands, symmetrically arranged on both sides of the crossbeam connecting rod 5; during tensioning, the steel strands J on both sides... i 8. Synchronous tensioning. (e.g.) Figure 1 and Figure 3 As shown, similarly, the transverse connecting rod 5 at the front end of the arch rib unit G1 and the arch rib unit G i+1 Steel strand J is installed between the rear transverse connecting rods 5 and 4. i+1 7. Arch rib unit G i+1 4 and arch rib element G i+2 After welding and fixing between them, tension the steel strand J i+1 7. Form a new arch segment; repeat this process until the entire arch rib assembly is complete. After the arch rib is formed, remove the transverse connecting rods 5, the sliding supports 6, and the tensioning steel strands J. i Then remove the lifting device 3 and proceed with subsequent construction steps.
[0044] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.
Claims
1. A method for constructing a steel pipe arch bridge segment by segment without support for the arch ribs, characterized in that, Includes the following steps: S1. Hoist each arch section to the installation position, and temporarily fix two arch sections symmetrically arranged in the transverse direction of the bridge according to the designed transverse spacing to form an arch rib unit G. i ; S2, sequentially connect two adjacent arch rib units G i Hinged between; a sliding support is provided at the front end of the arch rib unit G1 located at the starting end, and hinged to the sliding support; S3. Move the lifting device to the arch rib unit G. i The rear end, and the arch rib unit G i Connection, simultaneously in arch rib unit G i and arch rib unit G i+1 The rear end is provided with the sliding support, and is hinged to the sliding support respectively, in the arch rib unit G i+1 A pusher device is installed at the rear end; S4. The arch rib unit G is lifted by the lifting device. i From the rear end to the design height, arch rib unit G i+1 The front end is thus improved; During the lifting process, the jacking device synchronously jacks the arch rib unit G. i+1 The backend; S5, the arch rib unit G to be described i With arch rib element G i+1 After the hinge reaches the predetermined position, the arch rib unit G will be... i With arch rib element G i+1 The hinge joint is welded and fixed. S6. Move the lifting device to the hinge of the next arch rib unit and repeat steps S3 to S5 until the arch rib is formed.
2. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 1, characterized in that, In step S1, two arch sections symmetrically arranged in the transverse direction of the bridge are connected by a transverse connecting rod. The transverse connecting rod is detachably connected to the two arch sections and is located near the end of the arch section.
3. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 2, characterized in that, The transverse connecting rods are provided at both ends of the arch rib unit located at the starting end, and the transverse connecting rods are provided at the rear ends of the remaining arch rib units.
4. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 3, characterized in that, Each of the transverse connecting rods is provided with a sliding support at both ends; the sliding support includes a longitudinal track, a slider, and a hinge support. The longitudinal track is fixedly installed at the installation position of the corresponding arch section, the slider is slidably installed on the longitudinal track, the lower end of the hinge support is hinged to the slider, and the upper end of the hinge support is fixedly connected to one end of the transverse connecting rod.
5. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 4, characterized in that, The jacking device is a hydraulic cylinder. The fixed end of the hydraulic cylinder is fixedly connected to the longitudinal track, and its movable end is fixedly connected to the slider. An electro-hydraulic proportional control valve is provided on the oil circuit of the hydraulic cylinder.
6. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 4, characterized in that, An angle sensor is provided at the hinge joint between the hinge support and the slider.
7. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 4, characterized in that, The lifting device includes a lifting gantry, a sliding rail, and a continuous jack. The sliding rail is fixedly installed at the installation position of the corresponding arch section. The lifting gantry spans across the arch rib unit, and its bottom can move along the sliding rail. The continuous jack is correspondingly installed with the sliding support. The fixed end of the continuous jack is fixedly connected to the lifting gantry, and its movable end is fixedly connected to the slider.
8. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 3, characterized in that, It also includes the transverse connecting rod at the front end of the arch rib unit G1 at the starting end and the arch rib unit G i Steel strand J is installed between the horizontal connecting rods at the rear end. i In step S5, the arch rib unit G is... i With arch rib element G i+1 After welding and fixing, tension the steel strand J i , making the arch rib unit G i Together with the already installed arch rib units, they form an integral arch segment.
9. The method for constructing a steel pipe arch bridge segmentally without supports as described in claim 8, characterized in that, The steel strand J i Two strands are configured and symmetrically arranged on both sides of the transverse connecting rod; during tensioning, the steel strands J on both sides... i Synchronous tensioning.
Citation Information
Patent Citations
Prefabricated body, plain concrete arch bridge structure and construction method thereof
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Precast concrete arch bridge and construction method thereof
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