Construction method for double-sliding installation of super-large tonnage spherical support of high-speed railway

Abstract

The application provides a construction method for double-sliding installation of a high-speed railway super-large-tonnage spherical support, which comprises the following construction steps: roughening a top contact surface of a support cushion stone and drawing a support center line; installing a cushion stone top precision flat steel plate; installing a transverse sliding I-beam, which is fixed with a pier top embedded bolt; installing a double-spliced transverse sliding Bailey beam, assembling the double-spliced Bailey beam on the pier top, forming a frame beam through four I-beam bolt connections, and anchoring the rear part of the frame beam to the pier top embedded bolt; installing a Bailey beam top longitudinal sliding hoisting frame and a lifting system; placing the support on a pier bottom lifting platform and lifting the support above the cushion stone top through the lifting system; sliding the support after the support is lifted into place, aligning the support in front, back, left and right, and placing the support on the cushion stone after alignment. The application can solve the problems of independent cross operation of a large number of sub-projects of a complex structure, limitation of on-site working conditions, inability of large-scale hoisting equipment to be in place for a long time, and high leasing cost of the large-scale hoisting equipment.

Description

Technical Field

[0001] This invention mainly relates to the technical field of railway and bridge construction, specifically a construction method for double-sliding installation of ultra-large tonnage spherical bearings for high-speed railways. Background Technology

[0002] With the development of bridge structural methods, cable-stayed bridges spanning large distances and deviating from conventional continuous or simply supported beam forms are becoming increasingly common. Consequently, ultra-large tonnage, large-size, and heavy-weight bearing systems have emerged, and corresponding installation methods are receiving increasing attention. The longitudinal and transverse sliding installation system can safely, efficiently, and economically achieve the installation of this type of bearing. It solves problems such as the need for independent and overlapping operations of numerous sub-projects in complex structures, the inability of large lifting equipment to remain in place for extended periods due to limited on-site conditions, and the high cost of large lifting equipment rental. Summary of the Invention

[0003] To address the shortcomings of current technologies, this invention, based on existing technologies and practical applications, provides a construction method for the double-sliding installation of ultra-large tonnage spherical bearings for high-speed railways. This method solves problems such as the independent and overlapping operations of numerous sub-projects in complex structures, the inability of large lifting equipment to be in place for extended periods due to limited on-site conditions, and the high rental costs of large lifting equipment.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A construction method for double-sliding installation of ultra-large tonnage spherical bearings for high-speed railways includes the following construction steps:

[0006] S1. Roughen the contact surface of the bearing pad stone and draw the center line of the bearing.

[0007] S2. Install the precision-flat steel plate on the top of the stone pad;

[0008] S3. Install the transverse sliding I-beam crossbeam and fix it to the pre-embedded bolts on the top of the pier;

[0009] S4. Install double-segment transverse sliding Bailey beams. Assemble double-segment Bailey beams on the pier top and connect them with 4 I-beam bolts to form a frame beam. The rear of the frame beam is anchored to the pre-embedded bolts on the pier top.

[0010] S5. Install the longitudinal sliding hoisting frame and lifting system on the top of the Bailey beam;

[0011] S6. Place the support on the bottom lifting platform of the pier, and lift the support to above the top elevation of the pad stone using the lifting system;

[0012] S7. After the support is lifted into place, slide the support to align it front to back and left to right. After alignment, place the support on the pad stone and install the relevant components.

[0013] S8. Dismantle the hoisting structure.

[0014] Furthermore, step S1 specifically includes:

[0015] S11. Measure and lay out the precise location of the support installation position, and draw a chalk line frame;

[0016] S12. Roughen the surface by chiseling through the inside of the duckbill hammer frame;

[0017] S13. Rinse the roughened surface with high-pressure water and dry it with high-pressure air.

[0018] S14. Use ink lines to mark the center line of the support.

[0019] Furthermore, step S2 specifically includes:

[0020] S21. Install the support sleeve on the bottom of the steel plate;

[0021] S22. Install using wedge-shaped blocks at the four corners, and hoist and level the steel plate.

[0022] S23. Template installation and grouting.

[0023] Furthermore, step S3 specifically includes:

[0024] S31. At the pier top, at a distance of 1m from the edge line and at a distance of 1m from the edge line on the side of the bearing pad stone at the large mileage, a 50cm long rectangular wooden sleeper beam is installed.

[0025] S32. Install a 20-type I-beam crossbeam at the center of the bolster beam and fasten it with the pre-embedded bolts on the top of the pier.

[0026] Furthermore, step S4 specifically includes:

[0027] S41. Connect the 20-type I-beam transverse sliding directional pulley block with bolts;

[0028] S42. Manual labor is used in conjunction with the tower crane to assemble the double-section Bailey beams on the pier top. Four 20-type I-beams are bolted together at the top, bottom, front, and back to form a frame beam. The bolted connections are then fixed to the pulley blocks.

[0029] S43. The 32mm precision-rolled threaded steel at the rear of the frame beam is anchored to the pre-embedded bolts on the pier top.

[0030] Furthermore, step S5 specifically includes:

[0031] S51. Manually install the longitudinal sliding rails of the 20-type I-beam onto the top of the Bailey beam with the assistance of the tower crane, and then connect them with bolts.

[0032] S52. Connect the 20-type I-beam longitudinal sliding directional pulley block with bolts, and manually install it onto the longitudinal sliding track with the assistance of the tower crane;

[0033] S53. Weld the 20-type I-beam lifting frame together, install 4 50t through-hole jacks on the upper part, and bolt them to the frame to form a lifting system. Manually assist the tower crane to install the system onto the longitudinal pulley block.

[0034] S54. Install a combination hanger rod consisting of steel strand and 32mm precision rolled threaded steel.

[0035] Furthermore, step S6 specifically includes:

[0036] S61. The crane places the support on the lifting platform at the bottom of the pier and connects the lifting system boom;

[0037] S62. The lifting system jacks are raised out of the top in sequence according to the stroke, raising the support to 5-10cm above the top elevation of the pad stone. During the lifting process, the precision-rolled threaded steel bolts are tightened manually as a lifting safety measure. The longitudinal and transverse sliding wheel sets are locked during the lifting process.

[0038] Furthermore, step S7 specifically includes:

[0039] S71. After the support is raised to the position, release the longitudinal sliding wheel group lock and slide the support above the pad stone, aligning it front and back.

[0040] S72. Lock the longitudinal sliding wheel group, release the lateral sliding wheel group, and align the support in the left and right directions;

[0041] S73. After aligning the support, lock the lateral sliding wheel assembly, place the support on the pad stone, and install the relevant components.

[0042] Furthermore, step S8 specifically includes:

[0043] S81. Dismantle the longitudinal hoisting components;

[0044] S82. Dismantle the Bailey bridge frame;

[0045] S83. Remove the horizontal hoisting components.

[0046] The beneficial effects of this invention are:

[0047] 1. In this invention, the longitudinal and transverse sliding installation system solves the problem that large lifting machinery cannot occupy the construction space for a long time during the overlapping operations in space and time, such as the climbing formwork of cable-stayed bridge tower columns, the erection of the 0# block support, and the assembly and debugging of large cantilever bridge building machines. It achieves the goal of independent operation of each key sub-project without interference.

[0048] 2. In this invention, the rental cost of large-scale lifting machinery and equipment for the hoisting of ultra-large tonnage supports is high. The cost of hoisting is significantly reduced by using on-site inventory materials and equipment to assemble a temporary longitudinal and transverse sliding system. The construction period is basically the same as that of renting equipment, resulting in significant economic benefits. Attached Figure Description

[0049] Appendix Figure 1 This is a schematic diagram of the construction process of the present invention.

[0050] Appendix Figure 2 This is a schematic diagram of the longitudinal and transverse sliding structure of the present invention. Figure 1 .

[0051] Appendix Figure 3 This is a schematic diagram of the longitudinal and transverse sliding structure of the present invention. Figure 2 . Detailed Implementation

[0052] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0053] This invention provides a construction method for the double-sliding installation of ultra-large tonnage spherical bearings for high-speed railways, which solves problems such as the independent and overlapping operation of a large number of sub-projects in complex structures, the inability of large lifting equipment to be in place for a long time due to limited on-site working conditions, and the high rental cost of large lifting equipment.

[0054] refer to Figure 1-3 This is a partial structural diagram of the double-sliding installation process of the ultra-large tonnage spherical support of the present invention.

[0055] This embodiment mainly adopts the following construction steps.

[0056] (1) Roughen the contact surface of the bearing pad stone top.

[0057] ① Measure and lay out the precise location of the support 1 installation position, and draw a chalk line frame;

[0058] ② Roughen the surface inside the frame of the duckbill hammer;

[0059] ③ Rinse the roughened surface with high-pressure water and dry it with high-pressure air;

[0060] ④ The ink line is used to mark the center line of support 1.

[0061] (2) Installation of the steel plate on the top of the stone pad

[0062] ① Install support sleeve on the bottom of the steel plate;

[0063] ② The wedge blocks are installed with four corner supports, and the steel plates are hoisted, aligned, and leveled.

[0064] ③ Template installation and grouting.

[0065] (3) Installation of lateral sliding I-beams

[0066] ① Install 3 50cm long rectangular wooden sleeper beams at a 1m interval from the edge line at the small mileage of the pier top and at a 1m distance from the edge line on the side of the large mileage of the support pad stone.

[0067] ② A 20-type I-beam crossbeam is installed at the center of the bolster beam 3 and fixed with the pre-embedded bolts on the top of the pier.

[0068] (4) Installation of double-segment transverse sliding Bailey beams

[0069] ① Bolt connection of 20-type I-beam transverse sliding directional pulley block;

[0070] ② The double-section Bailey beam 5 is assembled on the pier top by manual assistance and tower crane. The upper, lower and front and back 4 rows of 20-type I-beams are bolted together to form a frame beam, which is then bolted to the pulley block.

[0071] ③ The 32mm precision-rolled threaded steel at the rear of the frame beam is anchored to the pre-embedded bolts on the pier top.

[0072] (5) Installation of the longitudinal sliding hoisting frame on the top of the Bailey beam

[0073] ① The 20-type I-beam longitudinal sliding rail 7 is installed on the top of the Bailey beam 5 by manual assistance and tower crane;

[0074] ②The 20-type I-beam longitudinal sliding directional pulley block is bolted together and manually installed onto the longitudinal sliding track 7 with the assistance of a tower crane;

[0075] ③ The 20-type I-beam lifting frame 8 is welded together, and four 50t through-hole jacks 6 are installed on the upper part and bolted to the frame 8 to form a lifting system. The system is installed onto the longitudinal pulley block by manual labor and tower crane.

[0076] ④ Installation of the combined hanger rod 2 consisting of steel strand and 32mm precision rolled threaded steel.

[0077] (6) Lifting the support

[0078] ① The crane places support 1 on the lifting platform at the bottom of the pier and connects to the lifting system boom 2;

[0079] ②The lifting system jack 6 is lifted out of the top in stages according to the stroke, lifting the support 1 to 5-10cm above the top elevation of the pad stone. During the lifting process, the precision-rolled threaded steel bolts are tightened manually as a lifting safety measure. The longitudinal and transverse sliding wheel sets are locked during the lifting process.

[0080] (7) Longitudinal sliding and installation of supports

[0081] ① After support 1 is raised into place, release the longitudinal sliding wheel group lock and slide support 1 above the pad stone, aligning it front and back;

[0082] ② Lock the longitudinal sliding wheel group, release the lateral sliding wheel group, and align the support 1 in the left and right directions;

[0083] ③ After aligning support 1, lock the transverse sliding wheel assembly, place support 1 on the pad stone, and install the relevant components.

[0084] (8) Dismantle the hoisting system

[0085] ① Dismantle the longitudinal hoisting components;

[0086] ②Remove the Bailey bridge frame;

[0087] ③ Remove the horizontal hoisting components.

[0088] In this embodiment, the longitudinal and transverse sliding installation system solves the problem of large lifting machinery occupying the construction space for a long time during overlapping operations in space and time, such as the climbing formwork of cable-stayed bridge towers, the erection of the No. 0 block support, and the assembly and commissioning of large cantilever bridge building machines. It achieves the goal of independent operation of each key sub-project without interference. The rental cost of large lifting machinery for the hoisting of ultra-large tonnage supports is high. The cost of hoisting is significantly reduced by assembling a temporary longitudinal and transverse sliding system with on-site inventory materials and equipment. The construction period is basically the same as that of renting equipment, resulting in significant economic benefits.

Claims

1. A construction method for high-speed railway super-tonnage spherical support double-sliding installation, characterized in that, The construction steps include the following: S1. Roughen the contact surface of the bearing pad stone and draw the center line of the bearing. S2. Install the precision-flat steel plate on the top of the stone pad; S3. Install the transverse sliding I-beam beam and fix it to the pre-embedded bolts on the top of the pier. The sliding I-beam beam is a 20-type I-beam. S4. Install double-segment transverse sliding Bailey beams. Assemble double-segment Bailey beams on the pier top and connect them with 4 I-beam bolts to form a frame beam. The rear of the frame beam is anchored to the pre-embedded bolts on the pier top. Step S4 specifically includes: S41. Connect the 20-type I-beam transverse sliding directional pulley block with bolts; S42. Manual labor is used in conjunction with the tower crane to assemble the double-section Bailey beams on the pier top. Four 20-type I-beams are bolted together at the top, bottom, front, and back to form a frame beam. The bolted connections are then fixed to the pulley blocks. S43. The 32mm precision-rolled threaded steel at the rear of the frame beam is anchored to the pre-embedded bolts at the top of the pier. S5. Install the longitudinal sliding hoisting frame and lifting system on the top of the Bailey beam; S6. Place the support on the bottom lifting platform of the pier, and lift the support to above the top elevation of the pad stone using the lifting system; S7. After the support is lifted into place, slide the support to align it front to back and left to right. After alignment, place the support on the pad stone and install the relevant components. S8. Dismantle the hoisting structure; Step S5 specifically includes: S51. Manually install the longitudinal sliding rails of the 20-type I-beam onto the top of the Bailey beam with the assistance of the tower crane, and then connect them with bolts. S52. Connect the 20-type I-beam longitudinal sliding directional pulley block with bolts, and manually install it onto the longitudinal sliding track with the assistance of the tower crane; S53. Weld the 20-type I-beam lifting frame together, install 4 50t through-hole jacks on the upper part, and bolt them to the frame to form a lifting system. Manually assist the tower crane to install the system onto the longitudinal sliding directional pulley block. S54. Install a combination hanger rod consisting of steel strand and 32mm precision rolled threaded steel. Step S6 specifically includes: S61. The crane places the support on the lifting platform at the bottom of the pier and connects the lifting system boom; S62. The lifting system jacks are pushed out of the top in sequence according to the stroke, raising the support to 5-10cm above the top elevation of the pad stone. During the lifting process, the precision-rolled threaded steel bolts are tightened manually as a lifting safety measure. The longitudinal and transverse sliding directional pulley blocks are locked during the lifting process. Step S7 specifically includes: S71. After the support is lifted into place, release the locking of the longitudinal sliding directional pulley block, slide the support above the pad stone, and align it front and back. S72. Lock the longitudinal sliding directional pulley block, release the lateral sliding directional pulley block from locking, and align the support in the left and right directions; S73. After aligning the support, lock the lateral sliding directional pulley block, place the support on the pad stone, and install the relevant components.

2. The construction method for double-slippage installation of super-large tonnage spherical supports for high-speed railways according to claim 1, characterized in that, Step S1 specifically includes: S11. Measure and lay out the precise location of the support installation position, and draw a chalk line frame; S12. Roughen the surface by chiseling through the inside of the duckbill hammer frame; S13. Rinse the roughened surface with high-pressure water and dry it with high-pressure air. S14. Use ink lines to mark the center line of the support.

3. The construction method for double-slippage installation of super-large tonnage spherical supports for high-speed railways according to claim 1, characterized in that, Step S2 specifically includes: S21. Install the support sleeve on the bottom of the steel plate; S22. Install using wedge-shaped blocks at the four corners, and hoist and level the steel plate. S23. Template installation and grouting.

4. The construction method for double-sliding installation of ultra-large tonnage spherical bearings for high-speed railways according to claim 1, characterized in that, Step S3 specifically includes: S31. At the pier top, at a distance of 1m from the edge line and at a distance of 1m from the edge line on the side of the bearing pad stone at the large mileage, a 50cm long rectangular wooden sleeper beam is installed. S32. Install a 20-type I-beam crossbeam at the center of the bolster beam and fasten it with the pre-embedded bolts on the top of the pier.

5. The construction method for double-sliding installation of ultra-large tonnage spherical bearings for high-speed railways according to claim 1, characterized in that, Step S8 specifically includes: S81. Dismantle the longitudinal hoisting components; S82. Dismantle the Bailey bridge frame; S83. Remove the horizontal hoisting components.

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