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CN-116463935-B - Drainage facility for bridge and construction method thereof

CN116463935BCN 116463935 BCN116463935 BCN 116463935BCN-116463935-B

Abstract

The application discloses a drainage facility for bridges and a construction method thereof, and relates to the technical field of bridge engineering, wherein the drainage facility comprises water interception structures, the number of the water interception structures is the same as that of drainage holes, each water interception structure is arranged in a ditch and is respectively positioned at the low-point edge of one drainage hole along the longitudinal bridge direction, and the two sides of each water interception structure are respectively connected with a protective wall and a track structure: the height of the water interception structure is configured to be not lower than a first height determined by the capacity of the drain pipe and a second height determined by the capacity of the drain pipe. The drainage facility and the construction method thereof have the advantages of convenient construction, lower construction cost, effective guarantee of drainage capability, avoidance of adverse effect on bridge structures due to drainage defects, almost no influence on construction of bridge main body structures, and convenience in popularization and application on ballastless track bridges.

Inventors

  • FU ZHANGONG
  • LIAO XUAN
  • HE DONGSHENG
  • YANG YONGHONG
  • GUO ZIJUN

Assignees

  • 中铁大桥勘测设计院集团有限公司
  • 沪杭铁路客运专线股份有限公司

Dates

Publication Date
20260508
Application Date
20230423

Claims (10)

  1. 1. The utility model provides a drainage facility for bridge, its characterized in that, bridge includes deck slab (5), and sets up protection wall (2) and track structure on deck slab (5), be formed with the irrigation canals and ditches between protection wall (2) and the track structure, a plurality of wash-out holes have been seted up to the irrigation canals and ditches, every wash-out hole is interior all installs wash-out pipe (4), drainage facility includes: the quantity of the water interception structures is the same as that of the water discharge holes, each water interception structure is arranged in the ditch and is respectively positioned at the edge of the low point of one water discharge hole along the longitudinal bridge direction, and the two sides of each water interception structure are respectively connected with the protective wall (2) and the track structure; The height of the intercepting structure is configured to be not lower than a first height determined by the capacity of the water drain of the trench and a second height determined by the capacity of the water drain pipe (4).
  2. 2. The drainage facility for bridges of claim 1, wherein the height of the intercepting structure is a larger value of the first height and the second height or a product of the larger value and a preset safety factor, the preset safety factor being greater than 1.
  3. 3. The drainage facility for bridges according to claim 1, wherein the protective wall (2) is a concrete protective wall, the track structure is a ballastless track plate (3), and the water interception structure is a concrete stopper (1).
  4. 4. A drainage system for bridges as set forth in claim 3, characterized in that the side of the concrete block (1) facing the adjacent drainage hole is a slope sloping downwards in the direction of the drainage hole.
  5. 5. The drainage facility for bridges according to claim 3, wherein the concrete block (1) is integrally cast with the bridge deck (5) or is connected with the bridge deck by a positioning steel bar, and the positioning steel bar is pre-embedded in the top surface of the bridge deck (5) and is positioned at the concrete block (1).
  6. 6. The drainage facility for bridges according to claim 1, wherein the protective wall (2) is a steel structure protective wall, the track structure comprises a concrete cushion layer (6) arranged on the bridge deck (5) and a ballastless track plate (3) arranged on the concrete cushion layer (6), the water interception structure is a steel baffle plate (7), one side of the water interception structure is connected with the steel structure protective wall, and the other side of the water interception structure is connected with the concrete cushion layer (6).
  7. 7. The drainage facility for bridges according to claim 6, wherein the bottom of the steel baffle plate (7) is provided with a water passing small hole.
  8. 8. The drainage facility for bridges according to claim 1, characterized in that the joints of the intercepting structure with the protective wall (2) and the track structure are coated with waterproof glue.
  9. 9. A method of constructing a drain facility as defined in claim 1, comprising the steps of: acquiring a first height determined by the drainage capacity of the ditch and a second height determined by the drainage capacity of the drainage pipe (4), and determining the height of the water interception structure according to a larger value in the first height and the second height; A water interception structure is arranged at the edge of the low point of each water drainage hole in the ditch along the longitudinal bridge direction, and two sides of the water interception structure are respectively connected with a protective wall (2) and a track structure.
  10. 10. The method of constructing a drain facility as claimed in claim 9, wherein: Determining a first height according to the principle that the drainage capacity of the ditch is equal to the design runoff; And determining the second height according to the principle that the water drainage capacity of the water drainage pipe (4) is equal to the design runoff.

Description

Drainage facility for bridge and construction method thereof Technical Field The application relates to the technical field of bridge engineering, in particular to a drainage facility for a bridge and a construction method thereof. Background Drainage facilities are important components of bridges, at present, the bridges are usually provided with drainage holes at equal intervals to ensure timely drainage on the bridge deck, and the diameters and the intervals of the drainage holes are mainly related to rainfall intensity, catchment area and bridge deck longitudinal slopes and transverse slopes. Wherein, the ballastless track bridge is usually provided with a herringbone slope, the highest point of the bridge deck elevation is positioned in the midspan, and the bridge deck elevation towards the beam ends at two sides is gradually reduced. In general, a large amount of rainwater on the bridge can be discharged through the drain holes on the two sides of the bridge preferentially converged on the larger bridge deck transverse slope, and only a small amount of rainwater is converged on the beam end through the longitudinal slope. However, when the bridge deck longitudinal slope is large, the rainfall intensity is large or the water discharge holes are blocked, the water accumulated on the bridge can not be discharged in time through the water discharge holes, and the rest rainwater is converged to the beam end. The expansion joint at the beam end can be influenced by the scouring action of rainwater to affect the structural performance and durability, meanwhile, the rainwater leaks to the lower structures such as piers, bridge decks and the like, and corrosion of the girder, the support and the like is easy to cause. If the water drainage facilities at the bridge abutment are not perfect, the bridge deck catchment is directly discharged from the bridge abutment, and scouring damage is caused to the road embankment. Disclosure of Invention Aiming at one of the defects in the prior art, the application aims to provide a drainage facility for a bridge and a construction method thereof, so as to solve the problem that the drainage defect in the related art adversely affects the bridge structure. The first aspect of the application provides a drainage facility for a bridge, the bridge comprises a bridge deck, a protective wall and a track structure, wherein the protective wall and the track structure are arranged on the bridge deck, a ditch is formed between the protective wall and the track structure, the ditch is provided with a plurality of drainage holes, and a drainage pipe is arranged in each drainage hole, the drainage facility comprises: The quantity of the water interception structures is the same as that of the water discharge holes, each water interception structure is arranged in the ditch and is respectively positioned at the low point edge of one water discharge hole along the longitudinal bridge direction, and the two sides of each water interception structure are respectively connected with the protective wall and the track structure; The height of the water interception structure is configured to be not lower than a first height determined by the capacity of the drain pipe and a second height determined by the capacity of the drain pipe. In some embodiments, the height of the intercepting structure is a larger value of the first height and the second height, or a product of the larger value and a preset safety factor, wherein the preset safety factor is greater than 1. In some embodiments, the protective wall is a concrete protective wall, the track structure is a ballastless track plate, and the water interception structure is a concrete block. In some embodiments, the side of the concrete block facing the adjacent drain hole is a slope inclined downward toward the drain hole. In some embodiments, the concrete stop block is integrally cast with the bridge deck slab or connected through a positioning steel bar, and the positioning steel bar is pre-embedded in the top surface of the bridge deck slab and is located at the concrete stop block. In some embodiments, the protection wall is a steel structure protection wall, the track structure comprises a concrete cushion layer arranged on the bridge deck and a ballastless track plate arranged on the concrete cushion layer, the water interception structure is a steel baffle, one side of the water interception structure is connected with the steel structure protection wall, and the other side of the water interception structure is connected with the concrete cushion layer. In some embodiments, the bottom of the steel baffle plate is provided with a water passing small hole. In some embodiments, the connection parts between the water interception structure and the protection wall and the track structure are coated with waterproof glue. A second aspect of the present application provides a method for constructing the above-described drainage facility, comp