Construction method of fixed piling platforms symmetrically arranged along steel bridge straining beam support in bridge direction

Abstract

The invention discloses a construction method of a fixed piling platform symmetrically arranged along a steel bridge straining beam support in the bridge direction, and belongs to the technical field of water area fixed piles. The steel pipe pile is directly inserted and hit by a vibratory hammer and is hoisted by a crawler crane until the steel pipe is hit 3 m away from a pebble bed and does not sink; after steel pipe pile construction is completed, after it is checked that the deflection and the buried depth of the steel pipe pile conform to the design, an opening is formed in the top of the steel pipe pile, it is guaranteed that the bottom face is flat, and a bearing beam is hoisted to the top end of the steel pipe pile and fixedly welded to the steel pipe pile; the bailey beams are spliced into bailey trusses according to the size of each group on the splicing site, then the bailey trusses are transported in place and fixedly installed on the bearing beams, and the bailey trusses are connected through inclined struts; after the bailey truss is installed, a bridge deck system is constructed; through deep fixing of the steel pipe piles and stable connection of all structures, the piling platform is more stable and not prone to inclination.

Description

Technical Field

[0001] The invention belongs to the technical field of fixed piles in water areas, and particularly relates to a construction method of a fixed piling platform that is symmetrically arranged along a steel bridge tie beam support in the direction of the bridge. Background Art

[0002] A river bridge is an artificial structure built specifically to maintain the continuity of a road when it encounters obstacles such as rivers, lakes, deep valleys, or other lines (railways or highways). It must ensure both the flow of traffic on the bridge and the proper drainage of water under the bridge, allowing ships to navigate, or vehicles to pass. During bridge construction, due to the relatively soft soil along the river bank, construction equipment operating in this area is prone to tilting due to soil problems, affecting the safety of workers. Therefore, how to provide a construction method for a fixed piling platform that is symmetrically arranged along the steel bridge tie beam support in the direction of the bridge is a problem that technicians in this field urgently need to solve. Summary of the Invention

[0003] The main purpose of this invention is to provide a method for constructing a fixed piling platform symmetrically arranged along the bridge's tie beam supports to address the aforementioned technical issues. By deeply securing the steel pipe piles and providing stable connections between the various structures, the piling platform is more stable and less prone to tilting.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for constructing a fixed piling platform symmetrically arranged along the bridge direction along a steel bridge tie beam support comprises the following steps:

[0006] S1: The piling platform adopts the fishing method for construction; the steel pipe pile is directly driven with a vibratory hammer and hoisted with a crawler crane. The steel pipe is driven into the gravel layer for 3m without sinking, and the steel pipe pile construction is completed;

[0007] S2, after the steel pipe pile construction is completed, check that the deflection and the depth of the steel pipe pile are consistent with the design, open the top of the steel pipe pile, ensure that the bottom surface is flat, hang the load-bearing beam to the top of the steel pipe pile, and weld it to the steel pipe pile;

[0008] In step 3, the Bailey beams are assembled into Bailey frames according to the size of each group at the assembly site, then transported to the site and installed on the load-bearing beams. After the Bailey frames are installed, the distribution beams are laid on top of the Bailey frames and fixedly connected to the distribution beams. The Bailey frames are connected by diagonal braces. After the Bailey frames are installed, the bridge deck system is constructed.

[0009] S4: The bridge deck at the location where the rotary drill holes are drilled will not be paved for the time being until the steel pipe piles of the support are constructed. The overall construction sequence is to start from the west downstream trestle, first construct the 48m auxiliary road platform, and then construct from the auxiliary road platform along the two main platforms of the tie beam support towards the bridge piers simultaneously;

[0010] S5. After the piling platform forms a certain working surface, a rotary drilling rig is used on the piling platform to formally drill holes for the steel pipe piles on the steel beam support and the main arch support. The holes are drilled inside the steel casing. After the holes are drilled, the steel pipe piles are sunk. Finally, concrete is poured into the steel pipe piles to the riverbed surface.

[0011] Furthermore, the position of the Bailey frame in step S3 needs to be determined after laying out the lines to ensure that the axis does not deviate. Positioning blocks and pressure plates are welded in the horizontal and vertical directions of the Bailey frame to fix the Bailey frame between the distribution beam and the load-bearing beam.

[0012] Furthermore, in step S5, a hole is formed in the steel casing. The steel casing is first driven into the riverbed with a vibratory pile hammer. After the steel casing is adjusted into place and fixed, a hole is drilled in the steel casing. The steel casing is followed up while drilling until it enters the rock layer by more than 50 cm. The rotary drill continues to drill until it reaches the designed rock penetration depth, and then the hole is cleaned.

[0013] Furthermore, the steel pipe piles are connected by scissor bracing and parallel joints.

[0014] Furthermore, scaffolding tube guardrails are provided on the sides of the formed bridge deck.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention makes the piling platform more stable and less prone to tilting by deeply fixing the steel pipe piles and stably connecting the various structures; in the present invention, the Bailey frame is assembled first and then installed on the steel pipe piles, which makes installation more convenient and helps to improve work efficiency; the scaffolding pipe guardrail in the present invention can well protect people on the bridge while ensuring aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Among them, 1-formed bridge deck, 2-distribution beam, 3-Bailey frame, 4-diagonal bracing, 5-load-bearing beam, 6-steel pipe pile, 7-scissor bracing, 8-lateral support. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, the present invention provides a method for constructing a fixed piling platform symmetrically arranged along the bridge direction along the tie beam support of a steel bridge, comprising the following steps:

[0022] S1: The piling platform uses the fishing method for construction. Steel pipe pile 6 is directly driven with a 90mm vibratory hammer and hoisted with a 70t crawler crane. The steel pipe is driven into the gravel layer until it does not sink for 3m. The construction of steel pipe pile 6 is completed.

[0023] S2, after the construction of the steel pipe pile 6 is completed, the deflection and the depth of the steel pipe pile 6 are checked to be consistent with the design, an opening is made on the top of the steel pipe pile 6, and the bottom surface is ensured to be flat. The load-bearing beam 5 is hoisted to the top of the steel pipe pile 6 and welded to the steel pipe pile 6. Stiffening plates can be provided on the top of the steel pipe pile 6 and on both sides of the load-bearing beam 5 to improve the stability of the pile body; and a bench beam can also be provided between the load-bearing beam 5 and the steel pipe pile 6;

[0024] S3: Bailey beams are assembled into Bailey frames 3 according to the size of each group at the assembly site, then transported to the site and installed on the load-bearing beams 5. After the Bailey frames 3 are installed, the distribution beams 2 are laid on top of the Bailey frames 3 and fixedly connected to the distribution beams 2. The Bailey frames 3 are connected by diagonal braces 4. After the Bailey frames 3 are installed, the bridge deck system is constructed.

[0025] S4: The bridge deck at the location where the rotary drill holes are drilled will not be paved for the time being until the steel pipe piles of the support are constructed. The overall construction sequence is to start from the west downstream trestle, first construct the 48m auxiliary road platform, and then construct from the auxiliary road platform along the two main platforms of the tie beam support towards the bridge piers simultaneously;

[0026] S5. After the piling platform forms a certain working surface, the 220 rotary drilling rig is used on the piling platform to formally drill holes for the steel pipe piles 6 on the steel beam support and the main arch support. The holes are drilled in steel casings. After the holes are drilled, the steel pipe piles 6 are sunk. Finally, concrete is poured into the steel pipe piles 6 to the riverbed surface.

[0027] In this embodiment, the position of the Bailey frame 3 in step S3 needs to be determined after laying out the lines to ensure that the axis does not deviate. Positioning blocks and pressure plates are welded in the horizontal and vertical directions of the Bailey frame 3 to fix the Bailey frame 3 between the distribution beam 2 and the load-bearing beam 5 to ensure the stability of the piling platform.

[0028] In this embodiment, in step S5, a hole is formed in the steel casing. The steel casing is first driven into the riverbed with a vibratory pile hammer. After the steel casing is adjusted into place and fixed, a hole is drilled in the steel casing. The steel casing is advanced while drilling until it enters the rock layer by more than 50 cm. The rotary drill continues to drill until it reaches the designed rock penetration depth, and then the hole is cleaned.

[0029] In this embodiment, the steel pipe piles 6 are connected by scissor struts 7 and flat joints. The scissor struts 7 are made of [16 steel. The scissor struts 7 are fixed between the steel pipe piles 6 by connecting plates during installation; the pile body of the steel pipe pile 6 is 630*10mm, and the pile length is not less than 13m. The load-bearing beam 5 is made of double-spliced 45 I-steel, and the main beam is the Bailey frame 3. The distribution beam 2 is laid on the Bailey frame 3. The spacing between adjacent distribution beams 2 is 75cm, and the distribution beam 2 is made of 25 I-steel. The formed bridge panel 1 uses 2×6×0.13m and 1×6×0.13m panels.

[0030] In this embodiment, a scaffolding tube guardrail is provided on the side of the formed bridge deck 1; the scaffolding tube guardrail is 1.2m high and is welded with Φ48×3mm welded steel pipes. The column spacing in the scaffolding tube guardrail is 1.5m and is welded to the formed bridge deck 1. The scaffolding tube guardrail is uniformly painted with red and white paint and arranged alternately to achieve simplicity and beauty.

[0031] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A construction method for a fixed piling platform arranged symmetrically along the bridge direction along the tie beam support of a steel bridge, characterized in that: The following steps are involved: S1, the piling platform adopts the fishing method for construction; the steel pipe pile (6) is directly driven with a vibrating hammer and hoisted with a crawler crane. The steel pipe is driven until it does not sink 3m into the pebble layer, and the construction of the steel pipe pile (6) is completed; S2, after the construction of the steel pipe pile (6) is completed, the deflection and the depth of the steel pipe pile (6) are checked to be consistent with the design, an opening is opened at the top of the steel pipe pile (6), and the bottom surface is ensured to be flat, and the load-bearing beam (5) is hoisted to the top of the steel pipe pile (6) and welded to the steel pipe pile (6); S3, the Bailey beams are assembled into Bailey frames (3) according to the size of each group at the assembly site, and then transported to the location and installed on the load-bearing beam (5). After the Bailey frame (3) is installed in place, the distribution beam (2) is laid on the top of the Bailey frame (3) and fixedly connected to the distribution beam (2). The Bailey frames (3) are connected by diagonal braces (4); after the Bailey frame (3) is installed, the bridge deck system is constructed; S4: The bridge deck at the location where the rotary drill holes are drilled will not be paved for the time being until the steel pipe piles of the support are constructed. The overall construction sequence is to start from the west downstream trestle, first construct the 48m auxiliary road platform, and then construct from the auxiliary road platform along the two main platforms of the tie beam support towards the bridge piers simultaneously; S5, after the piling platform forms a certain working surface, the piling platform is used to formally drill holes for the steel pipe piles (6) on the steel beam support and the main arch support. The holes are drilled in steel casings. After the holes are drilled, the steel pipe piles (6) are sunk. Finally, concrete is poured into the steel pipe piles (6) to the riverbed surface.

2. The method for constructing a fixed piling platform symmetrically arranged along the bridge direction along the tie beam support of a steel bridge according to claim 1, characterized in that: The position of the Bailey frame (3) in step S3 needs to be determined after laying out the lines to ensure that the axis does not deviate. Positioning blocks and pressure plates are welded in the horizontal and vertical directions of the Bailey frame (3) to fix the Bailey frame (3) between the distribution beam (2) and the load-bearing beam (5).

3. The method for constructing a fixed piling platform symmetrically arranged along the bridge direction along the tie beam support of a steel bridge according to claim 1, characterized in that: In step S5, a hole is formed in the steel casing. The steel casing is first driven into the riverbed with a vibratory pile hammer. After the steel casing is adjusted into place and fixed, a hole is drilled in the steel casing. The steel casing is followed up while drilling until it enters the rock layer more than 50 cm. The rotary drill continues to drill until it reaches the designed rock penetration depth, and then the hole is cleaned.

4. The method for constructing a fixed piling platform symmetrically arranged along the bridge direction along the tie beam support of a steel bridge according to claim 1, characterized in that: The steel pipe piles (6) are connected by scissor braces (7) and parallel joints.

5. The method for constructing a fixed piling platform symmetrically arranged along the bridge direction along the tie beam support of a steel bridge according to claim 1, characterized in that: Scaffolding pipe guardrails are provided on the sides of the formed bridge deck (1).

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