CN-122013726-A - Expansion joint multiple sealing device of U-shaped concrete aqueduct

CN122013726ACN 122013726 ACN122013726 ACN 122013726ACN-122013726-A

Abstract

The invention discloses an expansion joint multiple sealing device of a U-shaped concrete aqueduct, which belongs to the technical field of water delivery buildings and comprises an embedded steel plate arranged on the butt joint end surfaces of two sections of butt joint aqueducts, wherein a labyrinth sealing structure is arranged on a steel plate main body of the embedded steel plate, embedded bolts are fixed on the steel plate main body, a composite rubber block is arranged on the inner side of the butt joint of the two sections of aqueducts, mounting holes are formed in the composite rubber block, the embedded bolts penetrate through the mounting holes and are connected with spherical nuts, the composite rubber block is tightly fixed on the embedded steel plate through the spherical nuts, and water absorption expansion rubber strips are respectively arranged between the composite rubber block and the aqueduct and between the composite rubber block and the labyrinth sealing structure of the embedded steel plate. The invention adopts a multiple sealing structure, has reliable sealing and strong adaptive deformation capability, and is convenient to replace and maintain.

Inventors

LIANG LI
ZU DALEI
SHANGGUAN LINJIAN
LIANG JUN
SONG HUAIHUI
ZHAO YAO
YAO DAN
JI YAJING

Assignees

洛阳理工学院

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. The utility model provides a multiple sealing device of expansion joint of U type concrete aqueduct, sets up between two sections aqueducts (1) of butt joint, its characterized in that includes: The embedded steel plate (2) is respectively arranged at the butt joint ends of the two sections of aqueducts (1), the embedded steel plate (2) comprises a steel plate main body (201) and a labyrinth sealing structure, the labyrinth sealing structure is arranged on the steel plate main body (201) and exposes one end of the aqueduct (1), and the steel plate main body (201) is fixedly provided with an embedded bolt (5); The composite rubber block (4), the composite rubber block (4) is arranged on the inner side of the joint of the two sections of aqueducts (1), the composite rubber block (4) is provided with a mounting hole (401), the embedded bolt (5) passes through the mounting hole (401) and is connected with the spherical nut (6), the spherical nut (6) provides pretightening force for the composite rubber block (4), and the composite rubber block (4) is pressed on the steel plate main body (201); The water-absorbing expansion adhesive tape (7), the water-absorbing expansion adhesive tape (7) is arranged between the composite rubber block (4) and the aqueduct (1) and between the composite rubber block (4) and the labyrinth sealing structure on the embedded steel plate (2).
2. The expansion joint multiple sealing device of the U-shaped concrete aqueduct according to claim 1, wherein the labyrinth sealing structure on the embedded steel plate (2) comprises at least two layers of partition plates (202) which are arranged at intervals along the length direction of the aqueduct (1), and the partition plates (202) are perpendicular to the steel plate main body (201).
3. The expansion joint multiple sealing device of the U-shaped concrete aqueduct according to claim 1, wherein the composite rubber block (4) is internally embedded with a plurality of spring steel plates (3), and the plurality of spring steel plates (3) are arranged at intervals along the thickness direction of the composite rubber block (4) so as to enhance the compression resistance of the composite rubber block (4).
4. A multiple sealing device for expansion joints of U-shaped concrete aqueduct according to claim 3, characterized in that the spring steel plate (3) is wave-shaped and the wave-shape extends along the length direction of the aqueduct (1).
5. The expansion joint multiple sealing device of the U-shaped concrete aqueduct according to claim 1, characterized in that the composite rubber block (4) is made of rubber materials with different hardness in the thickness direction thereof.
6. The expansion joint multiple sealing device of the U-shaped concrete aqueduct according to claim 1, wherein a gap is reserved between the mounting hole (401) of the composite rubber block (4) and the embedded bolt (5) for adapting to the thermal expansion and cold contraction deformation of the embedded steel plate (2).
7. The expansion joint multiple sealing device of the U-shaped concrete aqueduct according to claim 2, wherein the composite rubber block (4) is further provided with an avoidance groove (403) for avoiding the labyrinth sealing structure, the avoidance groove (403) is provided with a sealing plate (402), the sealing plate (402) can be inserted between adjacent partition plates (202) of the labyrinth sealing structure, and the end face of the sealing plate (402) is tightly attached to the steel plate main body (201).
8. The multiple sealing device for expansion joints of a U-shaped concrete aqueduct according to claim 7, wherein a gap is left between two sides of the sealing plate (402) and the adjacent partition plates (202), and the gap is sized such that at least one side of the sealing plate (402) can be in close contact with the adjacent partition plates (202) when the temperature changes.
9. The expansion joint multiple sealing device of the U-shaped concrete aqueduct according to claim 1, wherein the lower end of the spherical nut (6) is in a spherical structure, the end part of the mounting hole (401) of the composite rubber block (4) is provided with a spherical surface matched with the lower end of the spherical nut (6), and the spherical nut (6) is tightly attached to the spherical surface of the end part of the mounting hole (401) through pretightening force.
10. The expansion joint multiple sealing device of the U-shaped concrete aqueduct according to claim 7, wherein the water-absorbing expansion adhesive tape (7) comprises a first water-absorbing expansion adhesive tape (701) and a second water-absorbing expansion adhesive tape (702), the first water-absorbing expansion adhesive tape (701) is arranged at two ends of the composite rubber block (4) along the length direction of the aqueduct (1) and is filled between the composite rubber block (4) and the aqueduct (1), and the second water-absorbing expansion adhesive tape (702) is arranged in an avoidance groove (403) of the composite rubber block (4) and is filled between the side surface of the avoidance groove (403) and the adjacent partition plate (202).

Description

Expansion joint multiple sealing device of U-shaped concrete aqueduct Technical Field The invention belongs to the technical field of hydraulic engineering and large-scale water delivery buildings, and particularly relates to an expansion joint multiple sealing device of a U-shaped concrete aqueduct. Background In large-scale water delivery engineering, the aqueduct is used as a key water delivery structure crossing complex terrains such as rivers, valleys and the like, and is formed by splicing a plurality of sections of concrete tanks. Because of the thermal expansion and contraction characteristics of the concrete material, foundation settlement and other factors, expansion joints are required to be arranged between adjacent aqueducts to adapt to structural deformation, and a sealing structure is adopted to prevent leakage in the water delivery process. At present, the existing aqueduct joint sealing technology mainly comprises two types, namely a traditional mode of pouring concrete after filling by adopting hemp ropes, a structure of the type is easy to age and crack in long-term use, the concrete needs to be destroyed for replacement after sealing fails, the maintenance difficulty is high and the period is long, and the other type adopts a mode of embedding water stops, such as copper strip water stops or rubber water stops, the water stops are usually covered by a concrete protection layer, and once the water stops are aged or damaged, the problems of difficult replacement and complex construction are also faced. In order to solve the problem of difficult replacement of the sealing material, there have been proposed improvements in the related art. For example, chinese patent No. CN110468684a discloses a seam sealing device for a U-shaped prefabricated aqueduct, where a U-shaped groove is provided on an end surface of a aqueduct segment, two adjacent grooves enclose a sealing cavity, a round rubber sealing strip is pulled into the sealing cavity by a pull rope, and pressurized gas or liquid is introduced by using a pressurized channel inside the rubber sealing strip, so that the rubber sealing strip expands and is sealed and combined with a stainless steel sheet in the groove. This technology achieves the interchangeability of the sealing material to some extent, but still suffers from the following disadvantages: 1. the sealing structure is maintained by pressure, the sealing effect is continuously kept in a pressurized state by the inside of the rubber sealing strip, and if pressure leakage occurs in long-term use, the sealing performance is obviously reduced, and potential reliability hazards exist. 2. The sealing mode is single, only the single-pass expansion sealing strip is attached to the smooth stainless steel sheet, a plurality of protection mechanisms are lacked, and leakage risks still exist under the long-term hydraulic action or structural deformation. 3. The adaptability is limited, the sealing structure of the sealing device does not fully consider the influence of axial expansion deformation of the aqueduct caused by temperature change on the sealing element, and the sealing failure is easy to be caused by structural displacement in long-term use. Therefore, the prior art still has the problems of insufficient sealing reliability, poor adaptability, inconvenient maintenance and the like, and a aqueduct sealing structure with more reasonable structure, better sealing performance, convenient maintenance and strong adaptability to deformation is needed. Disclosure of Invention The aqueduct sealing device is reasonable in structure, reliable in sealing performance, high in adaptive deformation capacity and convenient to install and replace on site, and has a plurality of waterproof mechanisms. In order to achieve the purpose, the technical scheme adopted by the invention is that the expansion joint multiple sealing device of the U-shaped concrete aqueduct is arranged between two sections of butt-jointed aqueducts and comprises: The embedded steel plates are respectively arranged at the butt joint ends of the two sections of aqueducts, each embedded steel plate comprises a steel plate main body and a labyrinth sealing structure, the labyrinth sealing structure is arranged at one end of the steel plate main body, which is exposed out of the aqueduct, and the embedded steel plates are fixedly provided with embedded bolts; The composite rubber block is arranged on the inner side of the joint of the two sections of the aqueducts, the composite rubber block is provided with a mounting hole, the embedded bolt penetrates through the mounting hole and is connected with a spherical nut, the spherical nut provides pretightening force for the composite rubber block, and the composite rubber block is pressed on the steel plate main body; the water-absorbing expansion adhesive tape is arranged between the composite rubber block and the aqueduct and between the composite rubber block and the labyrinth s