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CN-121976459-A - Interface enhanced UHPC bridge pier protecting shell structure in tropical damp and hot salt fog environment

CN121976459ACN 121976459 ACN121976459 ACN 121976459ACN-121976459-A

Abstract

The invention discloses an interface enhanced UHPC bridge pier protecting shell structure in a tropical wet and hot salt spray environment, and relates to the technical field of bridge pier protection, comprising a shell piece which is attached and fixed outside a bridge pier body; the top of the main channel is provided with a charging barrel, the inside of the charging barrel is provided with a storage bin and a drying bin, the drying bin is positioned above the storage bin, a drying plate is arranged in the drying bin, and a drying agent is filled in the charging barrel. According to the interface enhanced UHPC bridge pier protective shell structure in the tropical wet and hot salt mist environment, through the arrangement of the structures such as the charging barrel and the bottom box, the directional suction and discharge of salt-containing vapor are realized, the drying agent is sprayed in a dispersed manner, the concentration of the interface vapor is effectively reduced, the salt crystallization erosion and carbonization process of bridge pier body concrete are avoided, the electrochemical corrosion of internal reinforcing steel bars is induced, and meanwhile, the local microcracking of the inner side of a shell piece due to the unbalance of humidity is prevented.

Inventors

  • WANG JUN
  • GUO DONGYUE
  • HUANG SHAN
  • LI YAGE
  • JIANG WEI
  • LI BIN
  • LIU ZHIYONG
  • WANG ZHIGUO
  • SHEN LIAN

Assignees

  • 中国港湾工程有限责任公司
  • 武汉港湾工程质量检测有限公司

Dates

Publication Date
20260505
Application Date
20260323

Claims (10)

  1. 1. The interface enhanced UHPC bridge pier protecting shell structure in the tropical wet and hot salt mist environment is characterized by comprising a shell piece (1) which is adhered and fixed on the outer part of a bridge pier body (2); A main channel (101) is arranged on one side of the shell (1) close to the pier body (2), and a branch channel (102) is communicated with the side part of the main channel (101); The top of the main channel (101) is provided with a charging barrel (5), a storage bin (501) and a drying bin (502) are arranged in the charging barrel (5), the drying bin (502) is positioned above the storage bin (501), a drying plate (14) is arranged in the drying bin (502), and a drying agent is filled in the charging barrel (5); A bottom box (25) is arranged at the bottom of the main channel (101), a sliding plate (26) is arranged in the bottom box (25) in a sliding manner, a movable cavity (27) is formed between the sliding plate (26) and the top end of the bottom box (25), and a transmission rod is connected between the charging barrel (5) and the sliding plate (26); when the control charging barrel (5) moves downwards, the movable chamber (27) expands and sucks moisture in the main channel (101) and the branch channel (102), meanwhile, the transmission rod rotates to stir the drying agent, the bottom end of the charging barrel (5) is kept closed, and then external air enters the main channel (101) from the drying bin (502); When the feed cylinder (5) is reset upwards, the movable chamber (27) is contracted to discharge the moisture, and simultaneously the bottom end of the feed cylinder (5) is intermittently opened for discharging the drying agent.
  2. 2. The interface enhanced UHPC pier protecting shell structure in the tropical humid and hot salt mist environment according to claim 1, wherein the transmission rod is rotatably arranged on the material making cylinder (5) and extends to the interior of the drying bin (502), a first stirring plate (9) is arranged in the bin (501), and the first stirring plate (9) is fixedly connected to the transmission rod.
  3. 3. The interface enhancement type UHPC pier protective shell structure of the tropical damp and hot salt spray environment according to claim 1, wherein a discharging groove (6) is formed in the bottom of the material making barrel (5), an outer rod (504) is fixedly connected to the bottom of the material making barrel (5), the outer rod (504) is located at the edge of the bottom of the material making barrel (5), a blocking strip (7) for closing the discharging groove (6) is rotatably arranged on the outer rod (504), a first torsion spring (8) is arranged between the blocking strip (7) and the outer rod (504), a support plate (10) is fixedly connected to the transmission rod, the support plate (10) is located below the blocking strip (7), an ear block (12) is rotatably arranged at one end, far away from the transmission rod, of the support plate (10), the ear block (12) is in butt fit with the blocking strip (7), and a right-angle part (1201) and an arc-shaped part (1202) are arranged at one end, close to the support plate (10), of the ear block (12).
  4. 4. The interface enhanced UHPC pier protective shell structure in the tropical wet and hot salt mist environment according to claim 1, wherein an air inlet hole (15) is formed in the top end of the side wall of the drying bin (502), air outlet holes (16) are formed in the bottom end of the side wall of the drying bin (502), the air inlet holes (15) and the air outlet holes (16) are distributed in a staggered mode, a drying plate (14) is mounted on the inner wall of the drying bin (502), a second stirring plate (13) is arranged in the drying bin (502), and the second stirring plate (13) is fixed on a transmission rod.
  5. 5. The interface enhanced UHPC pier protecting shell structure of the tropical wet and hot salt spray environment according to claim 4, wherein a bottom ring (17) and a top ring (18) are slidably arranged in the drying bin (502), the bottom ring (17) is matched with the air outlet hole (16), the top ring (18) is matched with the air inlet hole (15), a connecting rod (19) is fixedly connected between the bottom ring (17) and the top ring (18), a stretching rod (20) is slidably arranged at the top of the charging barrel (5), the bottom end of the stretching rod (20) is fixedly connected to the top ring (18), a top cap (21) is fixedly connected to the top end of the stretching rod (20), and a first spring (22) is arranged between the top cap (21) and the top of the charging barrel (5).
  6. 6. The interface enhanced UHPC pier protecting shell structure in the tropical humid and hot salt spray environment according to claim 1, wherein a fixing seat (4) is movably arranged at the top of the main channel (101), the charging barrel (5) is slidably arranged on the fixing seat (4), a threaded sleeve (23) is fixed at the bottom of the fixing seat (4) through a mounting frame, and the transmission rod is in threaded fit with the threaded sleeve (23).
  7. 7. The interface enhanced UHPC pier protecting shell structure in the tropical humid and hot salt spray environment according to claim 1, wherein a fan (29) is fixedly arranged at the bottom end of the transmission rod.
  8. 8. The interface enhanced UHPC pier protecting shell structure in the tropical humid and hot salt spray environment according to claim 1, wherein the branch channel (102) is in a V shape, two ends of the branch channel are communicated with the main channel (101), a guide plate (24) is arranged at the top opening of the branch channel (102), the guide plate (24) is fixed on the inner wall of the main channel (101), and one end of the guide plate (24) away from the branch channel (102) is inclined upwards.
  9. 9. The interface enhanced UHPC pier protecting shell structure of the tropical wet and hot salt mist environment, according to claim 1, is characterized in that an input channel (3001) is arranged in the transmission rod, the input channel (3001) is communicated with the movable chamber (27), a filter screen (31) is fixedly arranged at the top end of the input channel (3001), a first one-way valve (32) is arranged in the input channel (3001), an output channel (33) is arranged at the top end of the bottom box (25), the output channel (33) penetrates through the outer wall of the shell (1), and a second one-way valve (34) is fixedly arranged in the output channel (33).
  10. 10. The interface enhanced UHPC pier protecting shell structure in the tropical humid and hot salt spray environment according to claim 1, wherein a plurality of shell pieces (1) are arranged.

Description

Interface enhanced UHPC bridge pier protecting shell structure in tropical damp and hot salt fog environment Technical Field The invention relates to the technical field of bridge pier protection, in particular to an interface enhanced UHPC bridge pier protection shell structure in a tropical damp-heat salt spray environment. Background In the tropical wet and hot salt spray environment, the bridge pier is influenced by high-humidity air, salt spray erosion and temperature fluctuation for a long time, so that concrete degradation, steel bar corrosion and other diseases are easy to occur, and the structural durability and safety are seriously reduced. Ultra-high performance concrete (UHPC) is widely used as a bridge pier protective shell material because of the advantages of high compactness, high corrosion resistance and the like, and is mounted on the outer wall of a bridge pier in a fitting way to form a protective system. In the UHPC bridge pier protecting shell structure in the prior art, interface micro-gaps are easily generated between the protecting shell and the outer wall of the bridge pier due to the difference of the thermal expansion coefficient, the water absorption rate and the elastic modulus of materials, external damp and hot salt fog air can permeate through the gaps, and moisture in bridge pier concrete can migrate to the interface, even if sealing glue is used for sealing, the trace moisture permeability of the sealing glue still can not completely prevent the moisture permeation, so that the interface continuously accumulates salt-containing moisture, the salt-containing moisture stays in the joint gap between the protecting shell and the outer wall of the bridge pier for a long time, so that the salt crystallization erosion and carbonization process of bridge pier concrete can be accelerated, the electrochemical corrosion of internal reinforcing steel bars can be induced, and meanwhile, the local micro-cracks can occur on the inner side of the protecting shell due to the unbalance of the humidity, so that the whole protecting performance is greatly weakened. Therefore, it is necessary to provide an interface enhanced UHPC pier shell structure in a tropical humid and hot salt spray environment to solve the above problems. Disclosure of Invention The invention aims to provide an interface enhanced UHPC bridge pier protecting shell structure in a tropical hot and humid salt fog environment, which aims to solve the problems that in the prior art, the protecting shell and the bridge pier outer wall are easy to generate interface micro-gaps due to the difference of material thermal expansion coefficient, water absorption and elastic modulus, external hot and humid salt fog air can permeate through the gaps and the internal moisture of bridge pier concrete can migrate to the interface, even if sealing glue is adopted for sealing, the trace moisture permeability of the sealing glue still can not completely prevent water vapor from permeating, so that salt-containing moisture continuously accumulates at the interface, and the salt-containing moisture stays in the joint gap between the protecting shell and the bridge pier outer wall for a long time, so that the salt crystal erosion and carbonization process of bridge pier concrete can be accelerated, the electrochemical corrosion of internal reinforcing steel bars can be induced, and meanwhile, the inner side of the protecting shell is also caused to generate local micro-cracks due to the unbalance of humidity, and the integral protection performance is greatly weakened. In order to achieve the aim, the invention provides the technical scheme that the interface enhanced UHPC bridge pier protecting shell structure in the tropical damp-heat salt fog environment comprises a shell piece which is attached and fixed on the outer part of a bridge pier body; The shell piece is provided with a main channel at one side close to the pier body, and a branch channel is communicated with the side part of the main channel; The top of the main channel is provided with a charging barrel, the inside of the charging barrel is provided with a storage bin and a drying bin, the drying bin is positioned above the storage bin, a drying plate is arranged in the drying bin, and a drying agent is filled in the charging barrel; The bottom of the main channel is provided with a bottom box, a sliding plate is arranged in the bottom box in a sliding way, a movable cavity is formed between the sliding plate and the top end of the bottom box, and a transmission rod is connected between the charging barrel and the sliding plate; When the charging barrel is controlled to move downwards, the movable chamber expands and sucks moisture in the main channel and the branch channel, meanwhile, the transmission rod rotates to stir the drying agent, the bottom end of the charging barrel is kept closed, and then external air enters the main channel from the drying bin; when the feed cylind