CN210596968U

CN210596968U - Self-compaction concrete steel pipe arch structure

Info

Publication number: CN210596968U
Application number: CN201920658836.9U
Authority: CN
Inventors: 柴国平; 茅建平; 邢国强
Original assignee: Zhejiang Dadongwu Group Construction Co Ltd
Current assignee: Zhejiang Dadongwu Group Construction Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-05-22
Anticipated expiration: 2029-05-09

Abstract

The utility model discloses a self-compaction concrete steel pipe arch structure, including the vacuum connecting device who is used for connecting steel pipe arch rib segment, vacuum connecting device includes and locates vacuum cavity, the fixed connection of steel pipe arch rib segment outer wall with gomphosis piece, the cover of steel pipe arch rib segment inner wall gomphosis the connecting piece of gomphosis piece tip and vacuum cavity tip, the vacuum cavity sets firmly the inlet valve mouth that is used for the evacuation, and the steel pipe arch rib connection gas tightness is good, can adopt the siphon grout, avoids appearing excessive thick liquid, the insufficient problem of concrete perfusion, and the connection accuracy between the steel pipe arch rib segment requires lowly.

Description

Self-compaction concrete steel pipe arch structure

Technical Field

The utility model relates to a bridge technical field especially relates to a self-compaction concrete steel pipe arch structure.

Background

The self-compacting concrete steel pipe arch is a combined material arch bridge formed by filling concrete in a steel pipe, the steel pipe improves the stability of the steel pipe wall when being pressed by means of the filled concrete, the corrosion resistance and the durability are improved, the concrete improves the compressive strength and the ductility of the self by means of the hoop effect of the steel pipe wall, the construction steps are that the steel pipe arch rib segment structure of the bridge superstructure is assembled on the shore side firstly and then integrally hoisted in place, and then the concrete is poured in, so that the integral quality of the steel structure can be ensured, and the navigation of a channel can not be greatly influenced, and the construction process is safe and reliable, however, in the process of pouring the concrete, part of floating slurry generally flows to the outer surface of the steel pipe arch rib, the concrete layer needs to be scraped before the follow-up work such as the anticorrosion coating work, and therefore, a large amount of labor is increased.

In the prior art, a welding mode is adopted, steel tube arch ribs are connected through outer wrapping plate joints, however, the method can reduce the phenomenon of slurry overflow from the surface, but in actual operation, the outer wrapping plates are stressed unevenly due to welding to cause the phenomena of poor air tightness, slurry explosion and the like, or the phenomena of insufficient concrete pouring and separation of the concrete from the steel tube arch rib interface due to the poor air tightness caused by the existence of welding seams are caused.

Disclosure of Invention

In order to solve the problem, the utility model provides a self-compaction concrete steel pipe arch structure, the steel pipe arch rib is connected the gas tightness good, can adopt the siphon grout, avoids appearing overflowing thick liquid, the insufficient problem of concrete perfusion, and the connection accuracy between the steel pipe arch rib fragment requires lowly.

The utility model provides a technical scheme of problem provide a self-compaction concrete steel pipe arch structure, a serial communication port, including the vacuum connecting device who is used for connecting the steel pipe arch rib segment, vacuum connecting device includes and locates vacuum cavity, the fixed connection of steel pipe arch rib segment outer wall with gomphosis piece, the cover of steel pipe arch rib segment inner wall gomphosis the connecting piece of gomphosis piece tip and vacuum cavity tip, the vacuum cavity sets firmly the inlet valve mouth that is used for the evacuation.

Preferably, the outer wall of the embedded part is provided with a first sealing ring for adjusting the attaching degree with the inner wall of the steel pipe arch rib segment.

Preferably, the end of the embedded part is provided with a second sealing ring for increasing the air tightness of the adjacent embedded part.

Preferably, the end part of the vacuum cavity is provided with a sucker which is integrally formed with the second sealing ring.

Preferably, the suction cup and the second sealing ring have the same thickness.

Preferably, the fitting member and the vacuum chamber are perpendicular to the connecting member.

Preferably, the vacuum chamber is further provided with a pressure relief valve for relieving pressure.

The utility model relates to a self-compaction concrete steel pipe arch structure, through establishing vacuum connecting device at the cover of the left and right both ends of steel pipe arch rib segment, wherein gomphosis piece is at steel pipe arch rib segment inner wall, and the vacuum cavity of gomphosis piece fixed connection then overlaps the outer wall of steel pipe arch rib segment, be connected the evacuation through the inlet valve mouth that sets up and vacuum pump, thereby connect steel pipe arch rib segment through vacuum connecting device, because the existence of first sealing washer, steel pipe arch rib segment and gomphosis piece seamless connection, and because the effect of atmospheric pressure also is seamless connection between vacuum cavity and the vacuum cavity, therefore the gas tightness is good, the excessive thick liquid phenomenon can not appear, establish vacuum connecting device at the most terminal steel pipe arch rib segment cover, insert the vacuum pump at the inlet valve mouth when pouring concrete, after reaching the siphon requirement, the concrete can independently continue to pour into, concrete pouring inadequately can not appear, the structure can not be constructed due to incomplete alignment of the rib sections of the steel pipe arch, and only partial alignment of the vacuum chamber is needed.

Drawings

Fig. 1 is a schematic structural diagram of an arch rib of a self-compacting concrete steel pipe arch structure in the embodiment;

FIG. 2 is a schematic view of a vacuum connection apparatus;

FIG. 3 is a cross-sectional structural view of a segment of a steel pipe rib;

FIG. 4 is a schematic view of the structure of a segment of an adjacent steel tube rib;

FIG. 5 is a schematic view of the combination structure of the inlet valve port and the pressure relief valve.

In the figure: 1. a steel tube rib segment; 2. a vacuum connection device; 3. an engaging member; 4. a vacuum chamber; 5. a connecting member; 6. an air inlet valve port; 7. a first seal ring; 8. a second seal ring; 11. a suction cup; 12. and (4) unloading the valve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 4, a self-compacting concrete steel tube arch structure comprises a vacuum connecting device 2 for connecting steel tube arch rib segments 1, wherein the vacuum connecting device 2 comprises an embedded part 3 embedded with the inner wall of the steel tube arch rib segment 1, a vacuum chamber 4 sleeved on the outer wall of the steel tube arch rib segment 1, and a connecting part 5 fixedly connecting the end part of the embedded part 3 with the end part of the vacuum chamber 4, as shown in fig. 2, the vacuum chamber 4 is fixedly provided with an air inlet valve port 6 for vacuumizing, during the installation process, the vacuum connecting device 2 is sleeved on the left end and the right end of the steel tube arch rib segment 1, wherein the embedded part 3 is embedded on the inner wall of the steel tube arch rib segment 1, the vacuum chamber 4 fixedly connected with the embedded part 3 is sleeved on the outer wall of the steel tube arch rib segment 1, and is connected with a vacuum pump through the arranged air inlet valve port 6 for vacuumizing, so that two adjacent steel tube arch rib segments 1 are connected through, because of the existence of the first sealing ring 7, the steel tube arch rib segment 1 is connected with the embedded piece 3 in a seamless way, the embedded piece 3 is attached to the inner wall of the steel tube arch rib segment 1, as shown in figure 2, after the vacuum pumping is finished between the

adjacent vacuum cavities

4 and 4, the seamless connection is also realized due to the action of the atmospheric pressure, so the air tightness is good, the vacuum cavities 4 and the embedded piece 3 are separated by the solid connecting piece 5, after the vacuum pumping is finished between the two opposite semicircular vacuum cavities 4, the air inlet valve port 6 is closed, the adjacent vacuum cavities 4 are attached in a seamless way, so the two opposite second sealing rings 8 are driven to be attached, namely the embedded piece 3 is attached, so the two adjacent steel tube arch rib segments 1 are connected in a seamless way, due to the action of the atmospheric pressure, the two connection is very firm, the air tightness is good, the slurry overflow phenomenon cannot occur, the vacuum connecting device 2 is sleeved on the steel tube arch rib segment 1 at, after siphon requirements are met, concrete can be automatically and continuously poured, insufficient concrete pouring can not occur, the structure cannot be constructed due to incomplete alignment of the steel pipe arch rib segments 1, only partial alignment of the vacuum chambers 4 is needed, and it is noted that in the embodiment, the embedded part 3 can be embedded into the inner wall of the steel pipe arch rib segment 1 through mechanical pressing before the steel pipe arch rib segments 1 are connected, or can be integrally formed and embedded into the inner wall of the steel pipe arch rib segment 1 during manufacturing of the steel pipe arch rib segment 1, and is fixedly connected with the vacuum chambers 4 through the connecting parts 5, and then vacuumizing is performed during actual connection.

As shown in fig. 3, the outer wall of the embedded part 3 is provided with a first sealing ring 7 for adjusting the fitting degree with the inner wall of the steel pipe arch rib segment 1, due to the existence of the first sealing ring 7, the steel pipe arch rib segment 1 and the embedded part 3 can be connected seamlessly because the first sealing ring 7 is made of an elastic material, and the adjacent vacuum chambers 4 are also connected seamlessly because of the effect of vacuum pumping at the atmospheric pressure, so that the steel pipe arch rib segment 1 is connected seamlessly, the air tightness is good, and the slurry overflow phenomenon cannot occur.

Because the embedded parts 3 are inevitably worn in the construction process, the adjacent embedded parts 3 are not tightly attached, and the end parts of the embedded parts 3 are provided with second sealing rings 8 for increasing the air tightness of the adjacent embedded parts 3.

Also, because the embedded part 3 is inevitably worn in the construction process, the adjacent vacuum cavities 4 are not tightly attached, and the end parts of the vacuum cavities 4 are provided with the suckers 11 which are integrally formed with the second sealing rings 8.

The thickness of the sucking disc 11 is the same as that of the second sealing ring 8, if the thickness of the sucking disc 11 is larger than that of the second sealing ring 8, the embedded part 3 cannot be completely attached, seamless connection of adjacent steel pipe arch rib segments 1 cannot be achieved even if the vacuum chamber 4 is vacuumized, and if the thickness of the second sealing ring 8 is larger than that of the sucking disc 11, the vacuum chamber 4 cannot be completely attached, and vacuumization cannot be performed.

In order to ensure the uniformity of each vacuum connection device 2, it is not necessary to distinguish the left and right directions when mounting, and the fitting member 3 and the vacuum chamber 4 are perpendicular to the connecting member 5.

As shown in fig. 5, the vacuum chamber 4 is further provided with a pressure relief valve 12 for releasing pressure, and when an abnormality is found during installation, the pressure relief valve 12 is used to release pressure, so as to separate the adjacent steel pipe rib segments 1 and make adjustment, in this embodiment, the pressure relief valve 12 is integrated with the intake valve port 6, and may be a commercially available three-way valve.

The specific embodiments described herein are merely illustrative of the spirit of the invention.

Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The self-compacting concrete steel pipe arch structure is characterized by comprising a vacuum connecting device (2) used for connecting steel pipe arch rib segments (1), wherein the vacuum connecting device (2) comprises embedded parts (3) embedded with the inner walls of the steel pipe arch rib segments (1), a vacuum cavity (4) sleeved on the outer walls of the steel pipe arch rib segments (1), and connecting parts (5) fixedly connected with the end parts of the embedded parts (3) and the vacuum cavity (4), and an air inlet valve port (6) used for vacuumizing is fixedly arranged in the vacuum cavity (4).

2. A self-compacting concrete steel tube arch structure according to claim 1, wherein the outer wall of the fitting piece (3) is provided with a first sealing ring (7) for adjusting the fitting degree with the inner wall of the steel tube arch rib section (1).

3. A self-compacting concrete steel tube arch structure according to claim 1, characterised in that the ends of the inserts (3) are provided with second sealing rings (8) for increasing the air tightness of the adjacent inserts (3).

4. A self-compacting concrete steel tube arch structure according to claim 3, characterised in that the end of the vacuum chamber (4) is provided with a suction cup (11) integrated with the second sealing ring (8).

5. A self-compacting concrete steel tube arch structure according to claim 4, characterised in that the suction cups (11) are of the same thickness as the second sealing ring (8).

6. A self-compacting concrete steel tube arch structure according to claim 1, characterised in that the insert (3) and the vacuum chamber (4) are perpendicular to the connecting piece (5).

7. A self-compacting concrete steel tube arch structure according to claim 1, characterised in that the vacuum chamber (4) is further provided with a pressure relief valve (12) for pressure relief.