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CN-116949941-B - Construction method of safety ladder cage of underwater pier continuous rigid frame bridge

CN116949941BCN 116949941 BCN116949941 BCN 116949941BCN-116949941-B

Abstract

The application relates to the technical field of highway bridges and discloses a construction method of a continuous rigid frame bridge safety ladder cage of a water pier. The method comprises the following steps of erecting a temporary pile sinking platform, erecting a pile sinking prefabricated steel pipe pile to obtain a mounting foundation, erecting a first transfer channel between the temporary pile sinking platform and the prefabricated steel pipe pile, erecting a longitudinal beam on the mounting foundation, erecting a ladder cage mounting platform on the longitudinal beam, erecting a first prefabricated ladder cage on the ladder cage mounting platform, erecting a second transfer channel between the first prefabricated ladder cage and a first underwater pier, erecting a second prefabricated ladder cage on the first underwater pier, and erecting a third transfer channel. The construction method of the safety ladder cage of the underwater pier continuous rigid frame bridge has simple working procedures, can quickly set up the safety ladder cage in water flow with low cost and environmental protection, and is convenient for switching continuous operation between adjacent underwater piers.

Inventors

  • QI JIAN
  • NIU SHULI
  • ZHOU ZEBING
  • ZHOU PU
  • YANG YUSHUAI

Assignees

  • 中国十九冶集团有限公司

Dates

Publication Date
20260505
Application Date
20230803

Claims (7)

  1. 1. The construction method of the safety ladder cage of the underwater pier continuous rigid frame bridge is characterized by comprising the following steps of: a. A temporary pile sinking platform (10) is erected near a water pier construction area; b. The pile driver (18) is positioned on the temporary pile driver platform, the pile driver (18) is started to drive the bottom end of the prefabricated steel pipe pile (11) into the basic rock layer (12) through a soil layer in water, the top end of the prefabricated steel pipe pile (11) is higher than the water surface (13), the number of the prefabricated steel pipe piles (11) is multiple, the top ends of all the prefabricated steel pipe piles (11) are positioned on the same plane, and connecting pieces (9) are arranged between the adjacent prefabricated steel pipe piles (11); c. a first transfer channel (6) is erected between the temporary pile sinking platform (10) and the prefabricated steel pipe pile (11); d. A longitudinal beam (8) is arranged at the top end of the prefabricated steel pipe pile (11), the longitudinal beam (8) is an I-shaped structural member and comprises an upper plate, a connecting plate and a lower plate which are sequentially connected from top to bottom, the connecting plate and the lower plate form a convex structural member, a through groove matched with the convex structural member is formed in the top end of the prefabricated steel pipe pile (11), the convex structural member penetrates through the through groove, and the longitudinal beam (8) is in clamping fit with the prefabricated steel pipe pile (11); e. cage mounting platforms (7) are arranged at the top An Sheti of the longitudinal beams (8); f. a first prefabricated ladder cage (3) is arranged on the ladder cage mounting platform (7); g. A second transit passage (2) is erected between the first prefabricated ladder cage (3) and the top end of the first underwater pier (14) close to the first prefabricated ladder cage; h. A second prefabricated ladder cage (1) is arranged at the top end of the first underwater pier (14); i. A third transfer passage (17) is erected between the second prefabricated ladder cage (1) and a second underwater pier (15) close to the first underwater pier (14).
  2. 2. The construction method of the safety ladder cage of the continuous rigid frame bridge in the water, as claimed in claim 1, is characterized in that the first prefabricated ladder cage (3) and the second prefabricated ladder cage (1) are prefabricated ladder cages with the same structure, safety doors are arranged on the prefabricated ladder cages, and ladders (4) are arranged in the prefabricated ladder cages.
  3. 3. The construction method of the safety ladder cage of the underwater pier continuous rigid frame bridge is characterized in that the number of the prefabricated steel pipe piles (11) is four, the top ends of the four prefabricated steel pipe piles (11) are sequentially connected to form a square structure, the number of the longitudinal beams (8) is two, and the two longitudinal beams (8) are arranged at the top ends of the four prefabricated steel pipe piles (11) in parallel.
  4. 4. The construction method of the continuous rigid frame bridge safety ladder cage of the underwater pier according to claim 2, wherein the number of the first prefabricated ladder cages (3) and the number of the second prefabricated ladder cages (1) are multiple, the prefabricated ladder cages and the second prefabricated ladder cages (1) are fixedly overlapped layer by layer respectively, through openings are formed in overlapped combination portions of adjacent first prefabricated ladder cages (3) and overlapped combination portions of adjacent second prefabricated ladder cages (1), and the ladders (4) in adjacent first prefabricated ladder cages (3) and the ladders (4) in adjacent second prefabricated ladder cages (1) are in butt joint through the corresponding through openings.
  5. 5. The construction method of the safety ladder cage of the underwater pier continuous rigid frame bridge, as claimed in claim 4, is characterized in that supporting pieces (5) are arranged between the first prefabricated ladder cage (3) and the first underwater pier (14) and between the second prefabricated ladder cage (1) and the second underwater pier (15).
  6. 6. The construction method of the safety ladder cage of the underwater pier continuous rigid frame bridge according to claim 5, wherein the number of the supporting pieces (5) is plural, and the supporting pieces (5) are arranged at intervals from top to bottom.
  7. 7. The construction method of the continuous rigid frame bridge safety ladder cage of the underwater pier according to claim 6, wherein the supporting piece (5) comprises two parallel first supporting rods (501), two ends of each first supporting rod (501) are respectively arranged on the prefabricated ladder cage and the underwater pier, the two first supporting rods (501) are sequentially connected with the underwater pier and the connecting part of the prefabricated ladder cage to form a square structure, second supporting rods (502) are arranged between the two first supporting rods (501) in a crossing mode, and the two second supporting rods (502) form diagonal lines of the square structure.

Description

Construction method of safety ladder cage of underwater pier continuous rigid frame bridge Technical Field The invention relates to the technical field of highway bridges, in particular to a construction method of a continuous rigid frame bridge safety ladder cage of a water pier. Background With the rapid development of the expressway industry, bridge construction is required to be added to the expressway construction process in order to pass through natural river, lake, canyon and other obstacles. Pier studs, capping beams, no. 0 blocks and continuous rigid frame engineering of the bridge are positioned in rivers, lakes and canyons or in water at the edges of two banks, and ladder cages are erected in the water of the rivers, the lakes and the canyons to serve as up-and-down passages for workers to construct in the construction process. The traditional safety ladder cage is directly erected on the flat ground, the requirement on the foundation is high, the construction and reconstruction of the foundation are needed due to the fact that the construction and reconstruction of the foundation are greatly influenced by terrains and landforms, the construction and reconstruction cost of the foundation in rivers, lakes and canyons is high, the foundation reconstruction in water needs operation in water, potential safety hazards exist, and cast-in-place concrete pile foundations are adopted as the foundation of the safety ladder cage, so that the problems of complex construction procedures, high cost, environmental protection, low efficiency and the like exist, the traditional safety ladder cage is inconvenient to convert, and therefore the construction operation channel requirements of each bridge structure in water cannot be met by the traditional safety ladder cage construction mode. In view of the above, there is a need to devise a method that can set up a security ladder cage in the water flow of a river, lake, canyon. Disclosure of Invention The invention provides a construction method of a safety ladder cage of a continuous rigid frame bridge of a water pier, which aims to solve the problems that the traditional construction method of the safety ladder cage has limitations that construction operation in rivers, lakes and canyons is not possible, the working procedure is complex, the cost is high, the environment is not protected, the efficiency is low and the conversion operation is inconvenient. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention discloses a construction method of a safety ladder cage of a continuous rigid frame bridge of a water pier, which comprises the following steps: a. A temporary pile sinking platform is erected near the underwater pier construction area; b. the pile driver is positioned on the temporary pile driver platform, the pile driver is started to drive the bottom end of the prefabricated steel pipe pile into a foundation rock layer through a soil layer in water, and the top end of the prefabricated steel pipe pile is higher than the water surface; c. a first transfer channel is erected between the temporary pile sinking platform and the prefabricated steel pipe pile; d. A longitudinal beam is arranged at the top end of the prefabricated steel pipe pile; e. A cage mounting platform at the top An Sheti of the stringer; f. A first prefabricated ladder cage is arranged on the ladder cage mounting platform; g. A second transfer channel is erected between the first prefabricated ladder cage and the top end of the first underwater pier close to the first prefabricated ladder cage; h. a second prefabricated ladder cage is arranged at the top end of the first underwater pier; i. And a third transfer channel is erected between the second prefabricated ladder cage and the second underwater pier close to the first underwater pier. Further, the first prefabricated ladder cage and the second prefabricated ladder cage are of the same structure, the prefabricated ladder cages are provided with safety doors, and ladders are arranged in the prefabricated ladder cages. Further, in the step d, the longitudinal beam is an I-shaped structural member, and comprises an upper plate, a connecting plate and a lower plate which are sequentially connected from top to bottom, wherein the connecting plate and the lower plate form a convex structural member, a through groove matched with the convex structural member is formed in the top end of the prefabricated steel pipe pile, the convex structural member penetrates through the through groove, and the longitudinal beam is matched with the prefabricated steel pipe pile in a clamping mode. Further, the number of the prefabricated steel pipe piles is multiple, and the tops of all the prefabricated steel pipe piles are located on the same plane. Further, the number of the prefabricated steel pipe piles is four, the tops of the four prefabricated steel pipe piles are sequentially connected to form a squa