A whole erecting method of five-span continuous basket handle arch bridge suitable for Neijiang river basin

Abstract

This invention relates to a method for the overall erection of a five-span continuous basket arch bridge applicable to the Neijiang River basin, comprising the following steps: First, using rotary drilling equipment to excavate and remove soil from the riverbed rock strata to form pile holes; Second, converting a deck barge into a mobile waterborne construction platform and lowering steel pipe piles into the pile holes; Third, using a floating crane to hoist the pre-modularly prefabricated truss structures on shore to the foundation piles for positioning and installation; Fourth, using a floating crane to hoist the major segments onto temporary supports, making the steel box girder continuous along the entire bridge direction; Fifth, after the steel box girder is connected to form the bridge deck system, using a floating crane to hoist and position the pre-fabricated steel arch segments to the designed positions on the steel box girder bridge deck, connecting the steel arch segments with the pre-embedded arch foot sections on the steel box girder, completing the installation of the entire bridge's steel arches; This invention adopts a "beam-first, arch-later" erection method, significantly shortening the construction period, saving costs, and reducing the safety risks of waterborne operations.

Description

Technical Field

[0001] This invention relates to the field of bridge erection technology, and in particular to a method for the overall erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin. Background Technology

[0002] Basket arch bridges, with their elegant design, high load-bearing capacity, and wide adaptability, have become one of the mainstream structural forms in the construction of long-span bridges and are widely used in important transportation projects spanning rivers and canyons. However, constructing a five-span basket arch bridge in complex geological and hydrological conditions such as the Neijiang River basin presents significant challenges. The complex and variable geological conditions at the bridge site, the busy river navigation, the difficulty in ensuring the stability of the underwater supports, the extremely high precision control requirements for the installation of large steel structural components, and the severely limited construction environment all pose enormous challenges to bridge construction.

[0003] Currently, the traditional method for erecting basket arch bridges mostly adopts the cable-stayed suspension method of "arch first, beam later," such as... Figure 1 As shown, after the piers are installed, a cable-stayed crane system is first erected on both banks. Then, the steel arch segments are hoisted into place using the cable-stayed crane, and temporarily anchored to the bank towers or ground anchors using inclined stay cables. The alignment is adjusted segment by segment through hooking and tensioning until the steel arch segments are joined to form a stable arch ring. Subsequently, steel box girder segments are symmetrically hoisted under or to the side of the completed steel arch using cable-stayed cranes. Finally, the suspenders are installed, and the system conversion is completed. Although this method is technically mature, it still has the following drawbacks: (1) The cable crane has limited lifting capacity, small weight and large number of lifting sections, and a significant increase in auxiliary facilities, resulting in a long construction period, high safety risks and difficulty in quality control; (2) Under complex geological and hydrological conditions such as the Neijiang River Basin, the fastening method requires the construction of large-scale temporary facilities such as back-pulling anchor counterweights on both banks of the dike. During the flood season, large-scale construction on the dike is very likely to induce geological disasters such as piping, which seriously threatens the safety of the dike and the safety of construction. (3) During the erection of the steel arch, the self-weight of the steel arch will generate a horizontal thrust on the pier when it is transferred downward to the pier. The traditional solution is to add horizontal cables as flexible tie rods at the arch foot of the steel arch to counteract the horizontal thrust, which increases the material input and construction procedures and is less economical. (4) In terms of water operations, personnel on both sides of the bridge need to rely on transport boats to travel between them, and construction workers also rely on water transportation to reach the bridge piers in the middle of the river, which increases equipment investment and safety hazards.

[0004] Therefore, traditional construction methods are insufficient to meet the comprehensive requirements of efficiency, safety, and environmental protection in the construction of modern basket arch bridges in the Neijiang River basin. This invention proposes a method for the overall erection of a five-span continuous basket arch bridge suitable for the Neijiang River basin to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for the overall erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin, which overcomes the shortcomings of the existing cable suspension method, such as long construction period, high safety risk, difficulty in quality control, and great safety hazards during the flood season, and achieves environmentally friendly, safe and efficient construction.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a method for the overall erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin, the innovation of which lies in the following steps: The first step is to install the bridge piers, load the rotary drilling equipment onto the deck barge, and then quickly transport it to the various pile positions on the water by tugboats. The rotary drilling equipment is then used to drill and break the rock in the riverbed to extract soil and form pile holes. The second step is to convert the deck barge into a mobile construction platform after all the pile holes have been drilled. The barge is then towed to each pile location by a tugboat and temporarily anchored. The steel pipe piles are then lowered into the pile holes to form the foundation piles. The third step is to use the floating cranes on the water construction platform to hoist the prefabricated modular truss structures from the shore onto the foundation piles for positioning and installation, thus forming a temporary support structure. The fourth step is to prefabricate the steel box girder into major segments in the factory, transport them to the bridge site by waterway, and use the floating cranes equipped on the water construction platform to hoist the major segments onto temporary supports. Then, the circumferential welds between the major segments are carried out to make the steel box girder run through the entire bridge. Fifth step: After the steel box girder is connected to form the bridge deck system, the prefabricated steel arch segments are hoisted and positioned to the designed positions on the steel box girder bridge deck using the floating cranes equipped on the water construction platform, so that the steel arch segments are connected to the pre-embedded sections of the arch feet on the steel box girder, and the installation of the steel arches of the whole bridge is completed.

[0007] Furthermore, the method for converting a deck barge into a mobile floating construction platform includes: installing a stability device on the deck barge; The stabilization device includes a portal column and a positioning steel pipe. A vertical through hole with a central axis is opened on the deck barge. A guide steel pipe matching the positioning steel pipe is installed in the through hole. The positioning steel pipe is movably inserted into the guide steel pipe. The portal column is fixedly installed on the deck of the deck barge. The middle of the portal column has a channel to accommodate the positioning steel pipe and allow the positioning steel pipe to move up and down. The top of the positioning steel pipe is set in the channel and is connected to a drive assembly to achieve up and down movement and mutual fixation with the portal column.

[0008] Furthermore, the connection drive assembly includes a spreader beam, a hydraulic jack, and a movable cross pin; The bottom of the hydraulic jack is fixed to the side wall of the positioning steel pipe by a bracket. The spreader beam is horizontally set above the hydraulic jack. The middle part of the spreader beam is connected to the end of the telescopic rod of the hydraulic jack. The two ends of the spreader beam are movably installed on the side wall of the portal column through the slide rail guide assembly and are driven to move up and down by the hydraulic jack. Several pin holes matching the movable cross pin are opened on the side wall of the portal column along the moving direction of the spreader beam.

[0009] Furthermore, the process of towing the above-water construction platform to each pile location by tugboat and temporarily anchoring it is as follows: After the stability device on the deck barge is installed, the positioning steel pipe is pressed against the riverbed under its own weight. The positioning steel pipe and the portal column are in the unlocked state. The extension rod of the hydraulic jack extends, pushing the spreader beam upward to the pin hole at the required height. The movable cross pin is inserted into the pin hole corresponding to the required height. The extension rod of the hydraulic jack retracts, causing the spreader beam to move downward and be supported by the movable cross pin. The extension rod of the hydraulic jack continues to retract, and the cylinder of the hydraulic jack moves the positioning steel pipe upward through the bracket, lifting the positioning steel pipe off the riverbed to the required height. After the deck barge is towed to the pile position by tugboat, the extension rod of the hydraulic jack extends, and the positioning steel pipe moves downward to the riverbed under its own weight. Then the movable cross pin is removed, the extension rod of the hydraulic jack retracts, and the spreader beam moves downward to the lowermost pin hole, completing the temporary anchoring.

[0010] Furthermore, a reinforcing structural member is installed at the bottom end of the positioning steel pipe. The reinforcing structural member includes two parallel vertically arranged first panels and two parallel vertically arranged second panels. The first panels and the second panels are perpendicular to each other. After the first panels and the second panels are interlocked and assembled, they form a grid-shaped structure.

[0011] Furthermore, the temporary support includes a lower truss structure for supporting large segments of the steel box girder; The lower truss structure has two structures arranged side by side. The two lower truss structures are connected to form a whole by a connecting frame installed during the modular prefabrication on the shore. The bottom end of each lower truss structure is connected to the top of the foundation pile through a lower distribution beam. The central axis of the lower distribution beam is consistent with the opening direction of the temporary support.

[0012] Furthermore, the temporary support also includes an upper truss structure for supporting the steel arch segments; The upper truss structure is located between two lower truss structures. The bottom ends of both sides of the upper truss structure are connected to the top of the lower truss structure on the same side through upper distribution beams. The top of the lower truss structure is provided with two support beams along the opening direction of the temporary support. The central axis of the support beams is consistent with the direction of the entire steel box girder bridge. The upper distribution beam is located above the two support beams and is supported by the two support beams. The central axis of the upper distribution beam is consistent with the opening direction of the temporary support.

[0013] Furthermore, the upper distribution beam is equipped with an adjustment pipe or a three-way jack for adjusting the alignment of the steel box girder.

[0014] The advantages of this invention are: (1) The present invention adopts the "beam first, arch later" erection method, that is, the steel box girder is erected first and then the steel arch is installed. Since the steel box girder is not affected by the height of the steel arch when it is erected, the steel box girder can be prefabricated into large segments in the factory and transported to the bridge site and then hoisted as a whole by a floating crane. This greatly reduces the number of on-site circumferential welding and the risk of paint damage. At the same time, it reduces the frequency of use of the floating crane and significantly shortens the construction period. After the steel box girder is first connected, the construction personnel can directly use the bridge deck to pass and install ladders to go up and down the piers, reducing the reliance on auxiliary equipment such as water transport boats. This saves costs and reduces the safety risks of water operations. The steel box girder that has been in place is used as a rigid tie rod to effectively balance the horizontal thrust generated by the arch foot when the steel arch is erected. This avoids the additional investment of adding flexible cables in the traditional scheme, thus greatly saving construction costs.

[0015] (2) The construction of foundation piles, temporary support erection, steel box girder and steel arch assembly of the present invention are all carried out using the floating platform method. This method transforms the deck barge into a mobile water construction platform. It can be quickly moved by tugboats, which can flexibly avoid waterways and ensure smooth navigation. It can also enter the anchorage in time during the flood season to avoid danger. Compared with the traditional operation method that relies on steel trestle bridge construction, this scheme effectively avoids the safety hazards of upstream floating objects impacting the trestle bridge during the three-month flood season in the narrow waterway of the Neijiang River Basin. It significantly improves construction efficiency, reduces operation risks, and greatly reduces the cost of steel trestle bridge construction.

[0016] (3) The present invention utilizes a floating crane on a construction platform on water for hoisting construction. Its lifting capacity is much higher than that of a gravity cable crane. It can not only perform modular fabrication of the truss structure and hoist and position it as a whole, but also divide the steel box girder into large segments, which greatly reduces the construction procedures and work cycle on water.

[0017] (4) By setting a lower distribution beam at the bottom of the lower truss structure, the present invention can effectively eliminate the impact of the uncertainty of underwater pile foundation construction on the prefabrication of the upper support. It does not require waiting for all pile foundation pilot holes to be completed and the opening data to be measured and collected before the upper structure design is carried out. This enables the synchronous advancement of the pile foundation pilot hole and the modular fabrication of the upper structure of the support, and greatly shortens the on-site construction cycle of the bridge site.

[0018] (5) The present invention provides an upper distribution beam at the top of the lower truss structure and an adjustment pipe or three-way jack on the upper distribution beam for the steel box girder alignment adjustment support. This can effectively solve the problem of deformation and sinking of temporary supports under their own weight, and ensure the flexibility and accuracy of beam alignment adjustment. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the traditional method of constructing a basket arch bridge.

[0021] Figure 2 This is a schematic diagram illustrating the method for erecting a steel box girder according to the present invention.

[0022] Figure 3 This is a schematic diagram illustrating the method of erecting a steel arch according to the present invention.

[0023] Figure 4 This is a schematic diagram of the drilling operation using a rotary drilling rig according to the present invention.

[0024] Figure 5 This is a schematic diagram of the stabilization device of the present invention.

[0025] Figure 6 This is a schematic diagram of the upper and lower distribution beams on the temporary support of the present invention. Detailed Implementation

[0026] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0027] Example

[0028] This embodiment provides a method for the overall erection of a five-span continuous basket arch bridge applicable to the Neijiang River basin, such as... Figure 2-6 As shown, it includes the following steps: Step 1: After installing the bridge piers, the rotary drilling equipment 2 is loaded onto the deck barge 1 and quickly transported by tugboat to the various pile positions on the water. The rotary drilling equipment 2 is then used to drill and break through the riverbed rock strata to create pile holes. Figure 4 As shown; The second step is to convert the deck barge into a mobile construction platform after all the pile holes have been drilled. The barge is then towed to each pile location by a tugboat and temporarily anchored. The steel pipe piles are then lowered into the pile holes to form the foundation piles. In this embodiment, the method for converting a deck barge into a mobile floating construction platform includes: installing a stabilization device on the deck barge. For example... Figure 5 As shown, there are two stabilization devices, installed on both sides of the deck barge in the width direction. Each stabilization device includes a portal column 3 and a positioning steel pipe 10. A vertical through-hole with a central axis is opened on the deck barge 1. A guide steel pipe 9 matching the positioning steel pipe 10 is installed inside the through-hole. The positioning steel pipe 10 is movably inserted into the guide steel pipe 9. A reinforcing H-beam 11 is fixedly installed on the deck of the deck barge 1. The portal column 3 is fixedly installed on the reinforcing H-beam 11 on the deck of the deck barge 1. The portal column 3 is connected to the deck of the deck barge 1 by diagonal braces 5. The portal column 3 has a channel in its middle to accommodate the positioning steel pipe 10 and allow it to move up and down. The top of the positioning steel pipe 10 is positioned within the channel and is connected to a drive assembly to achieve vertical movement and mutual fixation with the portal column 3.

[0029] Two connecting drive assemblies are symmetrically arranged on opposite sides of the portal column 3. Each assembly includes a spreader beam 6, a hydraulic jack 7, and a movable cross pin. The bottom of the hydraulic jack 7 is fixed to the side wall of the positioning steel pipe 10 via a bracket 8, and the bottom end of the cylinder of the hydraulic jack 7 is fixed to the bracket 8. The spreader beam 6 is horizontally positioned above the hydraulic jack 7, with its middle section connected to the end of the telescopic rod of the hydraulic jack 7. Both ends of the spreader beam 6 are movably mounted on the side wall of the portal column 3 via a slide rail guide assembly and are driven to move up and down by the hydraulic jack 7. The slide rail guide assembly includes two slide rails, each vertically fixed to the side wall of the portal column 3. Both ends of the spreader beam 6 are movably connected to the slide rail on the same side via sliders. Three pin holes matching the movable cross pin are provided on each side of the portal column 3 along the direction of movement of the spreader beam 6.

[0030] In this embodiment, a reinforcing structural member 17 is installed at the bottom end of the positioning steel pipe 10. The reinforcing structural member 17 includes two parallel vertically arranged first panels and two parallel vertically arranged second panels. The first panels and the second panels are perpendicular to each other. Each first panel has two first snap-fit ​​grooves for inserting the two second panels respectively, and each second panel has two second snap-fit ​​grooves for inserting the two first panels respectively. The two first panels are inserted into the corresponding second snap-fit ​​grooves on each second panel, and at the same time, the two second panels are inserted into the corresponding first snap-fit ​​grooves on each first panel, so that the first panels and the second panels are interlocked with each other. After welding and assembly, a grid-shaped structure is formed.

[0031] The process of towing the offshore construction platform to each pile location by tugboat and temporarily anchoring it is as follows: After the stability device on the deck barge is installed, the positioning steel pipe 10 presses against the riverbed under its own weight. The positioning steel pipe 10 and the portal column 3 are in the unlocked state. The telescopic rod of the hydraulic jack 7 extends, pushing the spreader beam 6 upward to the pin hole above the required height. The two movable horizontal pins are inserted into the two pin holes corresponding to the required height. The telescopic rod of the hydraulic jack 7 retracts, driving the spreader beam 6 downward and supported by the two movable horizontal pins, completing the locking of the positioning steel pipe and the portal column. The telescopic rod of the hydraulic jack 7 continues to retract, and the cylinder of the hydraulic jack 7 drives the positioning steel pipe 10 upward through the bracket 8, lifting the positioning steel pipe 10 off the riverbed to the required height. This required height is sufficient so that the deck barge will not touch the riverbed during its movement.

[0032] After the deck barge is towed to the pile position by tugboat, the telescopic rod of the hydraulic jack 7 extends, and the positioning steel pipe 10 moves down to the riverbed under its own weight. The positioning steel pipe is supported by the riverbed. Then the movable cross pin is removed, the telescopic rod of the hydraulic jack 7 retracts, and the spreader beam 6 moves down to the lower side of the bottom pin hole to complete the temporary anchoring.

[0033] The third step is to use the floating cranes on the water construction platform to hoist the prefabricated modular truss structures from the shore onto the foundation piles for positioning and installation, thus forming a temporary support structure.

[0034] like Figure 6 As shown, the temporary support includes several foundation piles 14, a lower truss structure 15 for supporting large segments of the steel box girder, and an upper truss structure 16 for supporting steel arch segments.

[0035] Two lower truss structures 15 are arranged side-by-side along the opening direction of the temporary support. The two lower truss structures 15 are connected as a whole by a connecting frame installed during modular prefabrication on land. Due to the complex underwater conditions in the Neijiang River basin, it is sometimes found that the predetermined pile position cannot be drilled during the actual bridge site drilling process. Usually, it is necessary to offset by about one pipe diameter to drill the hole. After the foundation pile position is changed, the opening between the corresponding pipe piles of the water support also needs to be changed. Therefore, in this embodiment, the bottom end of each lower truss structure 15 is connected to the top end of the foundation pile 14 through a lower distribution beam 13. The central axis direction of the lower distribution beam 13 is consistent with the opening direction of the temporary support. The lower distribution beam 13 is installed on the top of the foundation on the same side, and the bottom end of the lower truss structure 15 is connected to the top surface of the lower distribution beam.

[0036] The upper truss structure 16 is located above the lower truss structure 15 and is positioned between the two lower truss structures 15. The bottom ends of both sides of the upper truss structure 16 are connected to the top ends of the lower truss structures 15 on the same side via upper distribution beams 12. The top ends of the lower truss structures 15 have two support beams along the opening direction of the temporary supports. The central axis of the support beams is aligned with the overall direction of the steel box girder bridge. The upper distribution beams 12 are positioned above the two support beams and supported by them. The central axis of the upper distribution beams 12 is aligned with the opening direction of the temporary supports. The bottom ends of the upper truss structure 16 are fixedly installed on the top surface of the upper distribution beams 12. The upper distribution beams 12 are equipped with adjusting pipes or three-way jacks for adjusting the alignment of the steel box girder, effectively addressing the deformation and subsidence of the temporary supports under their own weight, ensuring the flexibility and accuracy of beam alignment adjustments.

[0037] The fourth step involves prefabricating the steel box girder into major segments in the factory, and then transporting them to the bridge site by waterway. Figure 2 As shown, the floating cranes equipped on the water construction platform are used to hoist the major segments onto temporary supports as a whole, and the circumferential welding between the major segments is carried out to make the steel box girder run through the entire bridge direction; Step 5: After the steel box girders are connected to form the bridge deck system, as follows... Figure 3 As shown, the prefabricated steel arch segments are hoisted and positioned to the designed locations on the steel box girder bridge deck using the floating cranes equipped on the water construction platform, so that the steel arch segments are connected to the pre-embedded sections of the arch feet on the steel box girder, thus completing the installation of the entire bridge's steel arches.

[0038] The five-span continuous basket arch bridge adopts a "beam-first, arch-later" erection method, meaning that the steel box girder is erected first, followed by the installation of the steel arch. Since the steel box girder erection is not affected by the height of the steel arch, the steel box girder can be prefabricated into large segments in the factory and then transported to the bridge site for overall hoisting by floating cranes. This significantly reduces the number of on-site circumferential welding operations, lowers the risk of paint damage, reduces the frequency of floating crane use, and significantly shortens the construction period. After the steel box girder is completed, construction personnel can directly use the bridge deck for passage and install ladders to go up and down the piers, reducing reliance on auxiliary equipment such as water transport boats. This saves costs and reduces the safety risks of water operations. The pre-installed steel box girder serves as a rigid tie rod, effectively balancing the horizontal thrust generated by the arch foot during the subsequent steel arch erection, avoiding the additional investment of flexible cables required in traditional solutions, thus greatly saving construction costs.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for the overall erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin, characterized in that: Includes the following steps: The first step is to install the bridge piers, load the rotary drilling equipment onto the deck barge, and then quickly transport it to the various pile positions on the water by tugboats. The rotary drilling equipment is then used to drill and break the rock in the riverbed to extract soil and form pile holes. The second step is to convert the deck barge into a mobile construction platform after all the pile holes have been rotary drilled. The deck barge is towed to each pile location by a tugboat and temporarily anchored. Then, the steel pipe piles are lowered and implanted into the pile holes to form the foundation piles. The third step is to use the floating cranes on the water construction platform to hoist the prefabricated modular truss structures from the shore onto the foundation piles for positioning and installation, thus forming a temporary support structure. The fourth step is to prefabricate the steel box girder into major segments in the factory, transport them to the bridge site by waterway, and use the floating cranes equipped on the water construction platform to hoist the major segments onto temporary supports. Then, the circumferential welds between the major segments are carried out to make the steel box girder run through the entire bridge. Fifth step: After the steel box girder is connected to form the bridge deck system, the prefabricated steel arch segments are hoisted and positioned to the designed positions on the steel box girder bridge deck using the floating cranes equipped on the water construction platform, so that the steel arch segments are connected to the pre-embedded sections of the arch feet on the steel box girder, and the installation of the steel arches of the whole bridge is completed.

2. The method for integral erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin according to claim 1, characterized in that: The method for converting a deck barge into a mobile floating construction platform includes: installing a stability device on the deck barge; The stabilization device includes a portal column and a positioning steel pipe. A vertical through hole with a central axis is opened on the deck barge. A guide steel pipe matching the positioning steel pipe is installed in the through hole. The positioning steel pipe is movably inserted into the guide steel pipe. The portal column is fixedly installed on the deck of the deck barge. The middle of the portal column has a channel to accommodate the positioning steel pipe and allow the positioning steel pipe to move up and down. The top of the positioning steel pipe is set in the channel and is connected to a drive assembly to achieve up and down movement and mutual fixation with the portal column.

3. The method for integral erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin according to claim 2, characterized in that: The connection drive assembly includes a spreader beam, a hydraulic jack, and a movable cross pin. The bottom of the hydraulic jack is fixed to the side wall of the positioning steel pipe by a bracket. The spreader beam is horizontally set above the hydraulic jack. The middle part of the spreader beam is connected to the end of the telescopic rod of the hydraulic jack. The two ends of the spreader beam are movably installed on the side wall of the portal column through the slide rail guide assembly and are driven to move up and down by the hydraulic jack. Several pin holes matching the movable cross pin are opened on the side wall of the portal column along the moving direction of the spreader beam.

4. The method for integral erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin according to claim 3, characterized in that: The process of towing the offshore construction platform to each pile location by tugboat and temporarily anchoring it is as follows: After the stability device on the deck barge is installed, the positioning steel pipe is pressed against the riverbed under its own weight. The positioning steel pipe and the portal column are in the unlocked state. The extension rod of the hydraulic jack extends, pushing the spreader beam upward to the pin hole at the required height. The movable cross pin is inserted into the pin hole corresponding to the required height. The extension rod of the hydraulic jack retracts, causing the spreader beam to move downward and be supported by the movable cross pin. The extension rod of the hydraulic jack continues to retract, and the cylinder of the hydraulic jack moves the positioning steel pipe upward through the bracket, lifting the positioning steel pipe off the riverbed to the required height. After the deck barge is towed to the pile position by tugboat, the extension rod of the hydraulic jack extends, and the positioning steel pipe moves downward to the riverbed under its own weight. Then the movable cross pin is removed, the extension rod of the hydraulic jack retracts, and the spreader beam moves downward to the lowermost pin hole, completing the temporary anchoring.

5. The method for integral erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin as described in claim 2, characterized in that: A reinforcing structural component is installed at the bottom of the positioning steel pipe. The reinforcing structural component includes two parallel vertically arranged first panels and two parallel vertically arranged second panels. The first panels and the second panels are perpendicular to each other. After the first panels and the second panels are interlocked and assembled, they form a grid-shaped structure.

6. The method for integral erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin according to claim 1, characterized in that: The temporary support includes a lower truss structure for supporting large segments of the steel box girder; The lower truss structure has two structures arranged side by side. The two lower truss structures are connected to form a whole by a connecting frame installed during the modular prefabrication on the shore. The bottom end of each lower truss structure is connected to the top of the foundation pile through a lower distribution beam. The central axis of the lower distribution beam is consistent with the opening direction of the temporary support.

7. The method for integral erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin according to claim 6, characterized in that: The temporary support also includes an upper truss structure for supporting the steel arch segments; The upper truss structure is located between two lower truss structures. The bottom ends of both sides of the upper truss structure are connected to the top of the lower truss structure on the same side through upper distribution beams. The top of the lower truss structure is provided with two support beams along the opening direction of the temporary support. The central axis of the support beams is consistent with the direction of the entire steel box girder bridge. The upper distribution beam is located above the two support beams and is supported by the two support beams. The central axis of the upper distribution beam is consistent with the opening direction of the temporary support.

8. The method for integral erection of a five-span continuous basket arch bridge applicable to the Neijiang River Basin according to claim 7, characterized in that: The upper distribution beam is equipped with adjusting pipes or three-way jacks for adjusting the alignment of the steel box girder.

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