Construction method for hoisting arch rib after large-span steel pipe arch firstly passes through beam transporting vehicle and bridge erecting machine

Abstract

The invention discloses a construction method for hoisting an arch rib after a large-span steel pipe arch passes through a beam transporting vehicle and a bridge erecting machine, and relates to the technical field of municipal bridge construction. 2, manufacturing a steel pipe arch; thirdly, temporary buttresses are arranged; step 4, bridge deck laying construction; fifthly, arch feet are pre-buried, and arch rib supports are arranged; sixthly, steel pipe arch ribs are hoisted; seventhly, follow-up construction is conducted; and eighthly, the temporary buttress is dismantled. According to the construction method for hoisting the arch rib after the large-span steel pipe arch passes through the beam transporting vehicle and the bridge girder erection machine firstly, the problems in the prior art can be effectively solved, the construction sequence and technology are optimized, the construction efficiency is improved, the construction period is shortened, safety and controllability are achieved, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal bridge construction, and particularly to a construction method for hoisting the arch rib after a long-span steel pipe arch first passes through a beam transport vehicle and a bridge erecting machine. Background Art

[0002] In the construction of a long-span continuous beam-steel pipe arch combined bridge and the paving and erection operation, in the traditional construction method, the continuous beam-steel pipe arch combined bridge is constructed first. After passing the acceptance, the beam transport vehicle and the bridge erecting machine pass through, and then the paving and erection operation is carried out. Using this traditional method, due to the relatively slow construction periods of the continuous beam, steel pipe arch, and suspender of the long-span bridge, the construction at this place becomes the key line of the whole line, restricting the passage of the beam transport vehicle and the bridge erecting machine and affecting the total construction period of the whole line; after the paving and erection equipment travels to this place, the waiting time is long, the paving and erection equipment is idle, and the construction cost increases. Summary of the Invention

[0003] The purpose of the present invention is to provide a construction method for hoisting the arch rib after a long-span steel pipe arch first passes through a beam transport vehicle and a bridge erecting machine, to solve the problems such as long construction period, high cost, and high safety risk existing in the existing construction method, and to improve the construction efficiency and quality.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The construction method for hoisting the arch rib after a long-span steel pipe arch first passes through a beam transport vehicle and a bridge erecting machine of the present invention includes the following steps:

[0006] Step 1. Construction of the concrete main beam: The continuous beam concrete main beam is constructed by the cantilever casting method using a hanging basket, and the construction quality of the concrete main beam is ensured;

[0007] Step 2. Fabrication of the steel pipe arch: A steel pipe arch fabrication and processing site is set near the bridge location or in a rear processing factory, and the steel pipe arch rib is fabricated in sections. After the sectional fabrication is completed, each section of the steel pipe arch rib is transported to a location near the bridge for storage;

[0008] Step 3. Setting of temporary piers: Temporary piers are set at the closure position of the concrete main beam. The temporary piers are of the pile-column type, and the pier body is a concrete-filled steel pipe column;

[0009] Step 4. Construction of the bridge deck paving and erection: While the steel pipe arch rib is being fabricated, a beam transport vehicle and a bridge erecting machine are used for transportation, paving, and erection construction;

[0010] Step 5. Embedding of the arch feet and setting of the arch rib supports: After the paving work in front of the steel pipe arch rib line is completed, the beam transport vehicle has finished transporting, and the bridge erecting machine has passed through, the construction of arch foot embedding and arch rib support erection is started;

[0011] Step 6. Hoisting of the steel pipe arch rib: Each section of the steel pipe arch rib is hoisted onto the bridge by a truck crane, and the hoisting of each section of the steel pipe arch rib is carried out in the order of arch feet first and then arch crown;

[0012] Step 7. Subsequent construction: After the hoisting of the steel pipe arch rib is completed, subsequent construction such as pouring of concrete for the steel pipe arch rib, installation and tensioning of the suspenders are carried out;

[0013] Step 8. Demolition of the temporary piers: After the installation of the steel pipe arch rib is completed, the temporary piers and the arch rib supports are demolished, and subsequent construction of the bridge deck is carried out.

[0014] Preferably, during the construction of the main girder in Step 1, in order to ensure the passage of the beam transport vehicle and the bridge erecting machine, during the construction of the main girder, the pre-embedding construction of the arch feet or the arch foot supports of the steel pipe arch is not carried out first.

[0015] Preferably, in Step 5. Arch foot pre-embedding and arch rib support setting: The arch foot concrete pouring operation is carried out outside the pre-embedded arch feet.

[0016] Preferably, in Step 6. Arch foot pre-embedding and hoisting of the steel pipe arch rib: During the hoisting process, the hoisted arch rib is supported by a temporary support to ensure the stability and alignment of the arch rib. After the adjacent arch rib sections are positioned by the code plates, full penetration butt welding of the arch rib sections is carried out to ensure the strength and stiffness of the connection part. After all the arch rib sections are hoisted, the closure construction of the arch rib is carried out. During the closure process, through precise measurement and adjustment, ensure that the alignment of the arch rib and the position of the anchor pipe meet the design requirements.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] 1) Saving construction period: The technology of this invention can change the critical path of construction, enabling the beam transport vehicle and the bridge erecting machine to operate without being restricted by the construction of the steel pipe arch. First, the continuous beam construction of the long-span bridge at this location is completed. After setting up the piers under the continuous beam and calculating that the load meets the passage of the beam transport vehicle and the bridge erecting machine, the beam transport vehicle and the bridge erecting machine are passed first for paving and erection operations. After the paving and erection in front of the line are completed, the construction of the steel pipe arch is carried out. The construction period for the steel pipe arch of the long-span bridge, concrete pouring in the arch, construction of the suspenders and tensioning is 90 days. This invention can save 90 days of construction period for the construction of each span of the steel pipe arch;

[0019] 2) Reducing construction cost: During the installation of the steel pipe arch by the traditional method, the bridge deck paving and erection equipment and personnel are often idle, increasing the equipment rental and personnel management costs. After adopting the technology of this invention for construction, the idle time of the paving and erection equipment and personnel is reduced. While carrying out the paving and erection operations, the fabrication of the steel pipe arch in the factory can be carried out, improving the utilization efficiency of the equipment and human resources, thereby reducing the construction cost;

[0020] 3) Reduce construction risks: During the installation of steel pipe arches using traditional methods, the bridge deck has not yet formed an integral structure, making it prone to structural deformation or damage due to uneven local stress. After adopting the technology of the present invention, after the paving and erection vehicle passes first, a stable bridge deck structure is formed, providing a reliable support for the subsequent hoisting of the arch ribs and reducing the structural risks during the construction process.

[0021] Generally speaking, the present invention can effectively solve the problems existing in the prior art, optimize the construction sequence and process, improve construction efficiency, save the construction period, ensure safety and controllability, and reduce construction costs. Brief Description of the Drawings

[0022] The present invention will be further described below in conjunction with the drawings.

[0023] Figure 1 It is a flow chart of the construction method for hoisting the arch ribs after the beam transporting vehicle and the bridge erecting machine pass first for the long-span steel pipe arch of the present invention;

[0024] Figure 2 It is a construction schematic diagram of Step 1 of the construction method for hoisting the arch ribs after the beam transporting vehicle and the bridge erecting machine pass first for the long-span steel pipe arch of the present invention;

[0025] Figure 3 It is a partial construction schematic diagram of Step 1 of the construction method for hoisting the arch ribs after the beam transporting vehicle and the bridge erecting machine pass first for the long-span steel pipe arch of the present invention;

[0026] Figure 4 It is a schematic diagram of the steel pipe arch rib of the present invention;

[0027] Figure 5 It is a construction schematic diagram of Step 3 of the construction method for hoisting the arch ribs after the beam transporting vehicle and the bridge erecting machine pass first for the long-span steel pipe arch of the present invention;

[0028] Figure 6 It is an enlarged schematic diagram of Part A of the present invention;

[0029] Figure 7 It is a schematic diagram of the beam transporting vehicle passing through in Step 4 of the construction method for hoisting the arch ribs after the beam transporting vehicle and the bridge erecting machine pass first for the long-span steel pipe arch of the present invention;

[0030] Figure 8 It is a construction schematic diagram of Step 5 of the construction method for hoisting the arch ribs after the beam transporting vehicle and the bridge erecting machine pass first for the long-span steel pipe arch of the present invention;

[0031] Figure 9 It is an enlarged schematic diagram of Part B of the present invention;

[0032] Figure 10 It is a construction schematic diagram of Step 6 of the construction method for hoisting the arch ribs after the beam transporting vehicle and the bridge erecting machine pass first for the long-span steel pipe arch of the present invention;

[0033] Figure 11Schematic diagram of Step 7 of the construction method for hoisting the arch rib after the large-span steel pipe arch of the present invention passes through the beam transporter and the bridge erecting machine;

[0034] Figure 12 Schematic diagram of Step 8 of the construction method for hoisting the arch rib after the large-span steel pipe arch of the present invention passes through the beam transporter and the bridge erecting machine.

[0035] Description of reference numerals: 1, concrete main beam; 2, steel pipe arch rib; 3, temporary pier; 4, beam transporter; 5, arch foot embedment; 6, arch foot concrete pouring; 7, arch rib support; 8, steel pipe arch rib concrete; 9, suspender. Detailed implementation manners

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] As Figures 1-12 shown, the construction method for hoisting the arch rib after the large-span steel pipe arch passes through the beam transporter and the bridge erecting machine includes the following steps:

[0038] Step 1, construction of the concrete main beam: The continuous beam concrete main beam 1 is constructed by the cantilever casting method with a hanging basket, and the construction quality of the concrete main beam 1 is ensured;

[0039] Step 2, fabrication of the steel pipe arch: A steel pipe arch fabrication and processing site is set up near the bridge location or in a rear processing factory, and the steel pipe arch rib 2 is fabricated in sections. After the sectional fabrication is completed, each section of the steel pipe arch rib 2 is transported to a location near the bridge for storage;

[0040] Step 3, setting of the temporary pier: A temporary pier 3 is set at the closure position of the concrete main beam. The temporary pier 3 is of a pile-column type, and the pier body is a concrete-filled steel pipe column. Further, the function of setting the temporary pier is to temporarily shorten the clear span of the continuous beam in the middle span and avoid excessive deflection when the beam transporter and the bridge erecting machine pass through during the paving and erection operations;

[0041] Step 4, deck paving and erection construction: While the steel pipe arch rib 2 is being fabricated, a beam transporter 4 and a bridge erecting machine are used for transportation, paving and erection construction;

[0042] Step 5, arch foot embedment and arch rib support setting: After the paving work in front of the steel pipe arch rib line is completed, the beam transporter has finished transporting, and the bridge erecting machine has passed through, the construction of the arch foot embedment 5 and the erection of the arch rib support 7 are started;

[0043] Step 6, hoisting of the steel pipe arch rib: Each section of the steel pipe arch rib 2 is hoisted onto the bridge by a truck crane, and the hoisting of each section of the steel pipe arch rib 2 is carried out in the order of arch foot first and then arch crown;

[0044] Step 7. Subsequent construction: After the hoisting of the steel pipe arch rib 2 is completed, subsequent construction such as the pouring of the concrete for the steel pipe arch rib 8, the installation and tensioning of the suspenders 9 are carried out;

[0045] Step 8. Demolition of the temporary piers: After the installation of the steel pipe arch rib 2 is completed, the temporary piers 3 and the arch rib supports 7 are demolished, and subsequent construction of the bridge deck is carried out;

[0046] Under the condition of tight construction period, the present invention can change the critical line of the long-span bridge construction at this place, save the construction period, reduce the idle time of the paving and erection equipment, reduce the cost and the safety risk of construction. At the same time, it can ensure the construction safety, economy and technical rationality, and has important application value, providing preliminary exploration and valuable experience for the construction of the same type of long-span steel pipe arch with the paving and erection vehicle passing first and then the arch rib hoisting.

[0047] Specifically, during the construction of the main girder in Step 1, in order to ensure the passage of the beam transport vehicle and the bridge erecting machine, during the construction of the main girder, the pre-embedding construction of the steel pipe arch arch feet or the arch foot supports is not carried out first.

[0048] Specifically, in Step 5, arch foot pre-embedding and arch rib support setting: The operation of pouring the arch foot concrete 6 is carried out outside the arch foot pre-embedding 5.

[0049] Specifically, in Step 6, arch foot pre-embedding and steel pipe arch rib hoisting: During the hoisting process, the temporarily hoisted arch ribs are supported by temporary supports to ensure the stability and alignment of the arch ribs. After the adjacent arch rib segments are positioned by the code plates, full penetration butt welding of the arch rib segments is carried out to ensure the strength and stiffness of the connection part. After all the arch rib segments are hoisted, the closure construction of the arch rib is carried out. During the closure process, through precise measurement and adjustment, ensure that the alignment of the arch rib and the position of the anchor pipe meet the design requirements.

[0050] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to this process, method, article or device.

[0051] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. Construction method for hoisting arch rib after large-span steel pipe arch passing through beam transporting vehicle and bridge erecting machine first, characterized in that, It includes the following steps: Step 1, Construction of the concrete main girder: The continuous beam concrete main girder (1) is constructed by the cantilever casting method using a hanging basket, and the construction quality of the concrete main girder (1) is ensured. Step 2, Fabrication of the steel pipe arch: A fabrication and processing site for the steel pipe arch is set up near the bridge location or in a rear processing factory. The steel pipe arch rib (2) is fabricated in sections. After the sectional fabrication is completed, each section of the steel pipe arch rib (2) is transported to a location near the bridge for storage. Step 3, Setting of temporary piers: Temporary piers (3) are set at the closure position of the concrete main girder. The temporary piers (3) are of the pile-column type, and the pier body is a concrete-filled steel pipe column. Step 4, Construction of the bridge deck erection: While the steel pipe arch rib (2) is being fabricated, a beam transport vehicle (4) and a bridge erecting machine are used for transportation and erection construction. Step 5, Embedding of arch feet and setting of arch rib supports: After the erection work in front of the steel pipe arch rib line is completed, the beam transport vehicle has finished transporting, and the bridge erecting machine has passed, the construction of arch foot embedding (5) and the erection of arch rib supports (7) are started. Step 6, Hoisting of the steel pipe arch rib: Each section of the steel pipe arch rib (2) is hoisted onto the bridge using a truck crane, and the hoisting of each section of the steel pipe arch rib (2) is carried out in the order of arch feet first and then the arch crown. Step 7, Subsequent construction: After the hoisting of the steel pipe arch rib (2) is completed, subsequent construction such as the pouring of concrete for the steel pipe arch rib (8), the installation and tensioning of suspenders (9) are carried out. Step 8, Demolition of temporary piers: After the installation of the steel pipe arch rib (2) is completed, the temporary piers (3) and the arch rib supports (7) are demolished, and subsequent construction of the bridge deck is carried out.

2. The construction method of hoisting the arch rib after the long-span steel pipe arch passes through the beam transporter and the bridge erecting machine first, characterized in that, In Step 1, during the construction of the main girder, in order to ensure the passage of the beam transport vehicle and the bridge erecting machine, during the construction of the main girder, the embedding construction of the steel pipe arch feet or the arch foot supports is not carried out first.

3. The construction method of hoisting the arch rib after the long-span steel pipe arch first passes through the beam transporting vehicle and the bridge erecting machine as described in claim 1, characterized in that, In Step 5, Embedding of arch feet and setting of arch rib supports: The operation of pouring arch foot concrete (6) is carried out outside the arch foot embedding (5).

4. The construction method of hoisting the arch rib after the long-span steel pipe arch first passes through the beam transporting vehicle and the bridge erecting machine, characterized in that, In Step 6, Embedding of arch feet and hoisting of the steel pipe arch rib: During the hoisting process, a temporary support is used to support the hoisted arch rib to ensure the stability and alignment of the arch rib. After adjacent arch rib sections are positioned by code plates, full penetration butt welding of the arch rib sections is carried out to ensure the strength and stiffness of the connection part. After all the arch rib sections are hoisted, the closure construction of the arch rib is carried out. During the closure process, through precise measurement and adjustment, it is ensured that the alignment of the arch rib and the position of the anchor pipe meet the design requirements.

Images