CN218147803U - Support arrangement for bent cap construction - Google Patents

Abstract

The utility model provides a strutting arrangement of bent cap construction, include: the support comprises at least two inclined support rods which are obliquely arranged, one ends of the at least two inclined support rods are connected with the hoop component, and the other ends of the at least two inclined support rods are connected with the ejector rod component. The utility model provides a pair of strutting arrangement of bent cap construction for support the high technical problem of the degree of difficulty in the prestressing force bent cap work progress of solving the big cantilever of high mound at least, it is convenient to bring for the construction of the big cantilever of high mound prestressing force bent cap.

Description

Support arrangement for bent cap construction

Technical Field

The utility model relates to a bridge engineering construction field especially relates to a strutting arrangement of bent cap construction.

Background

In the field of highway bridge construction, a plurality of bridges can generate prestressed capping beams of high-pier large cantilevers during design, the high-pier prestressed capping beams are important components for ensuring the load of a main structure of the bridge, the capping beams are used as important bearing members at the lower part of the bridge, bear the load of an upper structure and transmit the load to pier columns, and the effective distance between the prestressed capping beam structures and the ground can reach tens of meters or even hundreds of meters. Under some special environments, the construction difficulty is increased due to the large span, and a plurality of difficulties in safety, economic cost and convenient construction are generated.

In the construction process of the high pier prestressed capping beam template, the supporting devices adopted in the traditional capping beam construction are a jack, a longitudinal beam and a distribution beam generally, and the purpose of controlling the elevation of the capping beam is realized through the jack, the longitudinal beam and the distribution beam, but the construction load of the capping beam of the large cantilever is increased by a plurality of times compared with that of the common capping beam, and the traditional supporting device is difficult to adapt to the construction load and deformation of the capping beam of the large cantilever and cannot meet the main structure load requirement of a bridge.

Therefore, in order to solve the difficult problem of large-span cantilever construction support system, improve high mound prestressing force bent cap construction quality, guarantee that the major structure load of bridge satisfies the demand, the strutting arrangement of a bent cap construction of urgent need development brings conveniently for the high mound prestressing force bent cap construction of big cantilever, provides reliable assurance for operating personnel's safety and construction quality.

SUMMERY OF THE UTILITY MODEL

The utility model provides a strutting arrangement of bent cap construction for support the high technical problem of the degree of difficulty in the prestressing force bent cap work progress of solving high mound big cantilever at least, it is convenient to bring for the construction of the high mound prestressing force bent cap of big cantilever.

In order to achieve the above object, the utility model provides a strutting arrangement of bent cap construction, include: the support comprises at least two inclined support rods which are obliquely arranged, one ends of the at least two inclined support rods are connected with the hoop component, and the other ends of the at least two inclined support rods are connected with the ejector rod component.

The utility model provides a strutting arrangement of bent cap construction for in the prestressing force bent cap work progress of the big cantilever of high mound, support between pier stud and bent cap, can satisfy the bent cap construction load and the deformation requirement of big cantilever, wherein, the ejector pin subassembly supports the below at the bent cap, staple bolt subassembly is connected on the pier stud, through the elevation and the stress point of adjusting the ejector pin subassembly, and then realizes that bent cap die block plane position and elevation reach within the allowed band. The utility model provides a strutting arrangement of bent cap construction, cantilever bent cap to high mound large-span rectangle pier stud, cylindrical pier stud and the square pier stud of variable cross section all can be suitable for.

In a possible implementation manner, the hoop assembly includes a plurality of hoop short segments, the plurality of hoop short segments are connected end to end through a first threaded connecting rod to form a hollow structure, and one end of each of the at least two diagonal braces is connected to at least one of the hoop short segments.

In a possible embodiment, the ejector assembly comprises an ejector beam and at least two mounting seats arranged on the underside of the ejector beam, and the ejector beam is connected with the other ends of the at least two diagonal support rods through the at least two mounting seats respectively.

In a possible implementation manner, the bracket further comprises at least two transverse reinforcing rods, one ends of the at least two transverse reinforcing rods are respectively arranged on the side surfaces of the at least two inclined supporting rods, and the other ends of the at least two transverse reinforcing rods are provided with holding rod assemblies.

In a possible implementation manner, the pole embracing assembly includes a first pole embracing beam, a second pole embracing beam and a pair of second threaded connection rods, the second pole embracing beam is arranged in parallel with the first pole embracing beam, and the first pole embracing beam is connected with the second pole embracing beam through a pair of parallel arrangement second threaded connection rods.

In a possible implementation manner, the first pole embracing beam and the second pole embracing beam are both provided with threaded holes, and the pair of second threaded connecting rods are both in through connection with the threaded holes in the first pole embracing beam and the threaded holes in the second pole embracing beam.

In a possible implementation manner, at least two connecting seats are arranged on one side surface of the first holding pole beam, and the first holding pole beam is connected with the transverse reinforcing pole through the at least two connecting seats.

In a possible implementation manner, a vertical reinforcing rod is arranged between the transverse reinforcing rod and the inclined supporting rod, and two ends of the vertical reinforcing rod are respectively connected to the transverse reinforcing rod and the inclined supporting rod.

In a possible embodiment, the hoop nipple is L-shaped.

In a possible implementation mode, connecting flanges are arranged at two ends of each hoop short section, connecting holes are formed in the connecting flanges, and the first threaded connecting rods are connected to the connecting flanges of the two adjacent hoop short sections respectively.

The utility model provides a strutting arrangement of bent cap construction adds a plurality of strong points, wherein, the ejector pin subassembly supports the below at the bent cap, the staple bolt subassembly is connected on the pier stud, hold the pole subassembly and connect on the pier stud, the structure of a plurality of strong points is through changing traditional bent cap atress system like this, avoids stress concentration, and it is inhomogeneous to cause the atress. The utility model provides a strutting arrangement of bent cap construction through the elevation and the stress point of adjusting the ejector pin subassembly, realizes that bent cap die block plane position and elevation reach within the allowed band. The utility model provides a strutting arrangement of bent cap construction provides convenience for general type prestressing force bent cap support, and the cantilever bent cap that is adapted to rectangle pier stud, cylindrical pier stud and the square pier stud of variable cross section of high mound large-span supports all applicable.

In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions, other technical problems that can be solved by the supporting device for a capping beam construction provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description of the embodiments of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a front view of a support device for capping beam construction according to an embodiment of the present invention;

fig. 2 is a right side view of a supporting device for capping beam construction according to an embodiment of the present invention;

fig. 3 is a front view of a support device for capping beam construction according to an embodiment of the present invention;

fig. 4 is a right side view of a bracket of a support device for capping beam construction according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connecting plate of a support device for capping beam construction according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a hoop assembly of a support device for capping beam construction according to an embodiment of the present invention;

fig. 7 is a front view of a hoop nipple of a support device for capping beam construction provided by the embodiment of the present invention;

fig. 8 is a top view of a hoop nipple of a support device for capping beam construction provided by the embodiment of the present invention;

fig. 9 is a schematic structural view of a holding rod assembly of a support device for capping beam construction according to an embodiment of the present invention;

fig. 10 is a front view of a connection structure between a first holding beam and a connecting seat of the support device for bent cap construction according to the embodiment of the present invention;

fig. 11 is a top view of a first holding beam and a connecting seat connecting structure of a support device for bent cap construction provided in an embodiment of the present invention;

fig. 12 is a right side view of a first holding beam and a connecting seat connecting structure of a support device for bent cap construction according to an embodiment of the present invention;

fig. 13 is a front view of a first holding beam of the support device for bent cap construction according to the embodiment of the present invention;

fig. 14 is a top view of a first holding beam of the support device for capping beam construction according to the embodiment of the present invention;

fig. 15 is a right side view of a first holding beam of the support device for bent cap construction according to the embodiment of the present invention;

fig. 16 is a front view of a top rod assembly of the support device for capping beam construction according to an embodiment of the present invention;

fig. 17 is a top view of a mandrel component of a supporting device for capping beam construction provided by an embodiment of the present invention;

fig. 18 is a use effect diagram of the supporting device for capping beam construction according to the embodiment of the present invention;

fig. 19 is a right side view of fig. 18.

Description of reference numerals:

10-a scaffold;

11-diagonal brace rods;

12-a transverse stiffener;

13-vertical stiffeners;

14-a connecting plate;

20-a hoop assembly;

21-hoop short section;

211-a connection flange;

212-rib plate;

213-connecting hole;

22-a first threaded connecting rod;

30-a pole holding assembly;

31-a first holding beam;

32-a second holding beam;

33-a second threaded connecting rod;

34-a connecting seat;

312-a threaded hole;

313-a support plate;

40-a mandrel assembly;

41-a jack-beam;

42-a mounting seat;

43-ribbed plate;

50-pier stud;

60-cover beam.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The high pier capping beam mainly refers to a cross beam positioned on a higher pier stud, and is mainly used on the pier studs of bridges and elevated highways. The traditional mode of using jack, longeron, distribution beam is difficult to satisfy high mound bent cap construction demand, can't guarantee construction quality.

In view of the above background, the utility model provides a pair of strutting arrangement of bent cap construction is applicable to the prestressing force bent cap construction of the big cantilever of high mound, satisfies the load and the deformation requirement of the high mound prestressing force bent cap construction of big cantilever, has brought conveniently, fine assurance construction quality for the high mound prestressing force bent cap construction of big cantilever.

Referring to fig. 1 and 2, the utility model provides a pair of strutting arrangement of bent cap construction, include: support 10, staple bolt subassembly 20 and ejector pin subassembly 40, support 10 includes two at least diagonal braces 11 that the slope set up, and staple bolt subassembly 20 is connected to the one end of two at least diagonal braces 11, and the other end and the ejector pin subassembly 40 of two at least diagonal braces 11 are connected.

The utility model provides a pair of strutting arrangement of bent cap construction sets up one on every pier stud 50, uses in pairs. Referring to fig. 18 and 19, the bracket 10 is obliquely supported between the pier stud 50 and the capping beam 60, the hoop assembly 20 is connected to the periphery of the pier stud 50, the ejector rod assembly 40 is supported below the capping beam 60, and the ejector rod assembly 40 controls the dispersed load, so that the effect of supporting the capping beam 60 in an auxiliary manner is realized in the process of constructing the prestressed capping beam of the large cantilever of the high pier, convenience is brought to the construction of the prestressed capping beam of the high pier of the large cantilever, and the safety and construction quality of operators are reliably guaranteed. The hoop assembly 20 moves up and down to control the elevation of the support device for capping beam construction.

Referring to fig. 2 and 3, in one possible embodiment, at least two diagonal struts 11 are arranged parallel to each other.

Referring to fig. 6 and 7, in a possible implementation manner, the hoop assembly 20 includes a plurality of hoop nipples 21, the plurality of hoop nipples 21 are enclosed end to end by a first threaded connecting rod 22 to form a hollow structure, and one end of at least two diagonal braces 11 is connected to at least one hoop nipple 21.

Referring to fig. 6 and 18, the hoop assembly 20 is used to mount the lower end of the bracket 10 on the outer circumference of the pier 50. During the installation, a plurality of staple bolt nipple joint 21 encloses on pier stud 50's periphery, connects adjacent staple bolt nipple joint 21 end to end through first threaded connection rod 22, and the installation is convenient with the dismantlement.

Referring to fig. 16 and 17, the jack bar assembly 40 includes a jack bar beam 41 and at least two mounting seats 42 provided on the lower side of the jack bar beam 41, and the jack bar beam 41 is connected to the other ends of the at least two diagonal braces 11 through the at least two mounting seats 42, respectively.

In order to enhance the connection strength of the at least two mounting seats 42, a rib plate 43 is further arranged between the side surfaces of the at least two mounting seats 42 and the rod beam 41, the number of the rib plates 43 is selected according to the use requirement, one surface of the rib plate 43 is connected to the mounting seats 42 in a welding mode, and the other surface of the rib plate 43 is connected to the rod beam 41 in a welding mode.

Referring to fig. 3 and 4, the connecting plates 14 are respectively disposed at the upper ends and the lower ends of the at least two diagonal braces 11, so that the at least two mounting seats 42 are respectively connected with the connecting plates 14 disposed at the upper ends of the at least two diagonal braces 11 through screws, the connection between the ejector rod assembly 40 and the at least two diagonal braces 11 is realized, and the connection and the disconnection between the ejector rod assembly 40 and the bracket 10 are facilitated. The connecting plate 14 that the lower extreme of two at least diagonal braces 11 set up is connected on at least one staple bolt nipple joint 21, conveniently realizes being connected and dismantling of support 10 and staple bolt subassembly 20.

Referring to fig. 4 and 5, the upper and lower ends of at least two diagonal braces 11 may be provided with connecting plates 14 by welding, and the connecting plates 14 may be rectangular plates.

Referring to fig. 18, the roof rail 41 is for supporting under the lid rail 60 in the direction of the width of the lid rail 60

Referring to fig. 3 and 4, in a possible embodiment, the stent 10 further comprises at least two transverse reinforcing rods 12, and one ends of the at least two transverse reinforcing rods 12 are respectively arranged at the sides of the at least two diagonal supporting rods 11. To ensure the overall stability of the support frame 10, the other ends of the at least two transverse reinforcing rods 12 are provided with a derrick assembly 30.

Referring to fig. 9, in a possible implementation manner, the pole assembly 30 includes a first pole beam 31, a second pole beam 32 and a pair of second threaded connection rods 33, the second pole beam 32 is disposed parallel to the first pole beam 31, and the first pole beam 31 and the second pole beam 32 are connected by the pair of second threaded connection rods 33 disposed parallel to each other.

Referring to fig. 1, the central axis of the pole embracing assembly 30 coincides with the central axis of the hoop assembly 20, so that the pole embracing assembly 30 and the hoop assembly 20 can be installed on the periphery of the same pier 50 at intervals.

Referring to fig. 9 and 12, in a possible implementation manner, a threaded hole 312 is provided on each of the first holding beam 31 and the second holding beam 32, a pair of second threaded connecting rods 33 are connected to the threaded holes 312 on the first holding beam 31 and the threaded holes 312 on the second holding beam 32, and nuts are mounted on the pair of second threaded connecting rods 33, so that the pair of second threaded connecting rods 33 stably connect the first holding beam 31 and the second holding beam 32.

Referring to fig. 14 and 15, the first and second holding beam 31 and 32 may be i-shaped steel.

Referring to fig. 13 and 14, the lengths of the first and second clasping bar beams 31 and 32 may be set according to the size of the pier 50.

Referring to fig. 10 and 11, at least two connecting seats 34 are provided on one side of the first embrace beam 31, and the connecting plate 14 is also provided at one end of the transverse reinforcing bar 12. It will be readily appreciated that the connecting section 34 is connected to the connecting plate 14 at one end of the transverse reinforcing rods 12 by means of screws, so as to connect the pole assembly 30 to at least two transverse reinforcing rods 12. Facilitating the removal and attachment of the pole assembly 30 to at least two transverse spars 12.

Referring to fig. 11 and 12, in order to improve the connection strength between the connection seats 34 and the first holding beam 31, a support plate 313 is further disposed between the upper surfaces of the at least two connection seats 34 and the first holding beam 31, and two edges of the support plate 313 are connected with the upper surfaces of the at least two connection seats 34 and the first holding beam 31 by welding.

Through setting up horizontal stiffener 12 and embracing pole subassembly 30, strengthened the intensity of support 10, help promoting the utility model provides a pair of strutting arrangement's of bent cap construction supporting effect.

Referring to fig. 3, in a possible implementation, a vertical reinforcing rod 13 is arranged between the transverse reinforcing rod 12 and the inclined strut 11, and two ends of the vertical reinforcing rod 13 are respectively connected to the transverse reinforcing rod 12 and the inclined strut 11.

In a possible implementation mode, the transverse reinforcing rods 12 are horizontally arranged, and the vertical reinforcing rods 13 are perpendicular to the transverse reinforcing rods 12, so that the strength of the support 10 is enhanced, and a stable supporting effect of the support 10 is ensured.

Referring to fig. 7 and 8, the hoop nipple 21 is not limited to be L-shaped, and may also be C-shaped. It is easy to understand that when the pier 50 is a pier with a rectangular structure or a pier with a variable cross-section square pier-shaped structure, the hoop short section 21 can be in an L shape; when the pier 50 is a cylindrical pier, the hoop short section 21 may be C-shaped. Facilitating installation of the hoop assembly 20 on the outer periphery of the pier stud 50.

In a possible implementation manner, both ends of the hoop nipple 21 are provided with connecting flanges 211, the connecting flanges 211 are provided with connecting holes 213, the first threaded connecting rods 22 are respectively connected to the connecting flanges 211 of two adjacent hoop nipples 21, and nuts are mounted on the first threaded connecting rods 22.

In order to enhance the strength and the connection stability of the connection flange 211, a rib plate 212 is arranged between the outer side of the hoop short section 21 and the back of the connection flange 211, and the rib plate 212 may be connected with the outer side of the hoop short section 21 and the back of the connection flange 211 by welding.

In a possible implementation manner, the present invention provides a support 10 in a support device for a bent cap construction, which includes a plurality of inclined struts 11 disposed in an inclined manner, wherein the plurality of inclined struts 11 are disposed in parallel, and of course, the number of the plurality of inclined struts 11 is not limited to 3 or 4. Of course, the number of the vertical reinforcing rods 13 and the number of the transverse reinforcing rods 12 are the same as that of the inclined supporting rods 11.

The utility model provides a pair of strutting arrangement of bent cap construction adds a plurality of strong points, avoids stress concentration, causes the atress inhomogeneous, through the elevation and the stress point of ejector pin subassembly 40 on the strutting arrangement of adjusting the bent cap construction, and then realizes within the die block plane position and the elevation of bent cap 60 reach the allowed range. The difficult problem of high mound prestressing force bent cap construction support is solved, the support to the cantilever of the rectangle pier stud 50 of large-span, cylindrical pier stud 50, the square pier stud 50 of variable cross section and bent cap 60 all can be applicable.

During the use, through calculating and confirming the position of the installation of ejector pin subassembly 40, ejector pin subassembly 40 supports the below at bent cap 60, and confirm the position that staple bolt subassembly 20 installed, staple bolt subassembly 20 is installed in the periphery of pier stud 50, and install in the accurate elevation department of pier stud 50 accurately, adopt the screw to be connected support 10 and staple bolt subassembly 20, will embrace pole subassembly 30 and also install in the periphery of pier stud 50, and embrace pole subassembly 30 and be located the top of staple bolt subassembly 20, embrace pole subassembly 30 and be connected with support 10 through the screw, the rethread screw is connected ejector pin subassembly 40 and support 10. The disassembly and assembly process is convenient, the turnover efficiency is improved, the construction efficiency is accelerated, the supporting effect is good, and the safety is high.

The utility model provides a pair of strutting arrangement of bent cap construction, simple structure, simple operation, low cost and turnover rate are high, are applicable to various types of pier stud 50, satisfy the support requirement of high mound prestressing force cantilever bent cap template, can greatly improve the construction progress.

It should be noted that the numerical values and numerical ranges referred to in this application are approximate values, and there may be some error due to the manufacturing process, and the error may be considered to be negligible by those skilled in the art.

In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc. used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be of a particular construction and operation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. The utility model provides a strutting arrangement of bent cap construction which characterized in that includes: the hoop component (20) is connected to one end of each inclined support rod (11), and the other end of each inclined support rod (11) is connected with the ejector rod component (40).

2. The support device for capping beam construction according to claim 1, wherein the hoop assembly (20) comprises a plurality of hoop nipples (21), the hoop nipples (21) are connected end to end by a first threaded connecting rod (22) to form a hollow structure, and one end of each of the at least two diagonal braces (11) is connected to at least one hoop nipple (21).

3. The support device for capping construction according to claim 2, wherein the ejector assembly (40) comprises an ejector beam (41) and at least two mounting seats (42) provided at a lower side of the ejector beam (41), and the ejector beam (41) is connected to the other ends of the at least two diagonal braces (11) through the at least two mounting seats (42), respectively.

4. The support device for capping construction according to any one of claims 1 to 3, wherein the bracket (10) further comprises at least two transverse reinforcing rods (12), one end of each of the at least two transverse reinforcing rods (12) is arranged at the side of each of the at least two diagonal supporting rods (11), and the other end of each of the at least two transverse reinforcing rods (12) is provided with a holding rod assembly (30).

5. The support device for the bent cap construction is characterized in that the holding rod assembly (30) comprises a first holding rod beam (31), a second holding rod beam (32) and a pair of second threaded connecting rods (33), the second holding rod beam (32) is arranged in parallel with the first holding rod beam (31), and the first holding rod beam (31) and the second holding rod beam (32) are connected through the pair of second threaded connecting rods (33) arranged in parallel.

6. The support device for the bent cap construction is characterized in that threaded holes (312) are formed in the first holding beam (31) and the second holding beam (32), and the pair of second threaded connecting rods (33) are connected into the threaded holes (312) in the first holding beam (31) and the threaded holes (312) in the second holding beam (32) in a penetrating mode.

7. The support device for bent cap construction according to claim 6, wherein at least two connecting seats (34) are arranged on one side of the first holding beam (31), and the first holding beam (31) is connected with the transverse reinforcing rod (12) through the at least two connecting seats (34).

8. The support device for capping beam construction according to claim 4 is characterized in that a vertical reinforcing rod (13) is arranged between the transverse reinforcing rod (12) and the diagonal strut (11), and two ends of the vertical reinforcing rod (13) are respectively connected to the transverse reinforcing rod (12) and the diagonal strut (11).

9. The device for supporting the capping beam construction according to claim 2, wherein the hoop short section (21) is L-shaped.

10. The support device for capping beam construction according to claim 9, wherein the hoop short joints (21) are provided with connecting flanges (211) at both ends, the connecting flanges (211) are provided with connecting holes (213), and the first threaded connecting rod (22) is respectively connected to the connecting flanges (211) of two adjacent hoop short joints (21).

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