Connecting structure of prefabricated pier

Abstract

The utility model discloses a connecting structure of a prefabricated assembly type pier, which comprises pier column sections and a connecting structure, a plurality of pier column sections are spliced in sequence, and the connecting structure is used for connecting two adjacent pier column sections. The connecting structure comprises a pre-buried steel pipe, a connecting flange and post-pouring concrete, and the pre-buried steel pipe is pre-buried in the cavity of the pier column section and extends out of the pier column section to be connected with the connecting flange. Wherein the two adjacent connecting flanges are connected through bolts so that the two adjacent pier column sections can be temporarily connected, and then the embedded steel pipe and a joint between the two adjacent pier column sections are filled with the post-poured concrete so that the two adjacent pier column sections can be fixedly connected. According to the connecting structure of the prefabricated pier, the prefabricated pier columns can be quickly and efficiently spliced, the prefabricated pier column sections are manufactured and formed in a factory and spliced in a construction site, the complexity of site construction is greatly reduced, the construction efficiency is improved, and the industrial construction and environmental protection concepts are embodied.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction technical field, concretely relates to a connecting structure of prefabricated assembly type pier. BACKGROUND

[0002] At present, the pier construction of the bridge mainly adopts the cast-in-place mode, a large number of support formworks are erected through the construction site, then the steel bars are manually bound and tied and the concrete is cast in place, and the pier is formed through natural or artificial curing. The pier structure obtained by the construction method is strong in integrity, the cast-in-place concrete is seamlessly connected with the foundation and adjacent components, excellent in seismic performance, and can adapt to the complex form of the pier. However, the cast-in-place construction mode has the problems of relatively low quality assurance rate of the cast-in-place pier column, low industrialization degree, long construction period and low construction efficiency.

[0003] With the continuous innovation of technology, the prefabricated assembly type pier develops rapidly, and the construction speed is fast and the form is beautiful. However, the assembling process of the prefabricated pier column is complex, and the strength of the connecting point of the pier column is insufficient, which affects the use of the prefabricated assembly type pier. SUMMARY

[0004] Therefore, it is necessary to provide a connecting structure of prefabricated assembly type pier to solve the above problems, so that the prefabricated piers are efficiently and conveniently spliced on site, the construction safety degree is high, and the connecting structure has good applicability and durability.

[0005] A connecting structure of prefabricated assembly type pier, comprising: a pier column segment and a connecting structure, a plurality of pier column segments are sequentially spliced, and the connecting structure is used for connecting two adjacent pier column segments.

[0006] The connecting structure comprises a pre-embedded steel pipe, a connecting flange and post-poured concrete, the pre-embedded steel pipe is pre-embedded in the cavity of the pier column segment, and the pre-embedded steel pipe is connected with the connecting flange outside the pier column segment.

[0007] Among them, two adjacent connecting flanges are connected by bolts to temporarily connect two adjacent pier column segments, and then the post-poured concrete is filled in the pre-embedded steel pipe and the joint between two adjacent pier column segments to fixedly connect two adjacent pier column segments.

[0008] In one embodiment, the side wall of the pre-embedded steel pipe is arranged with a plurality of communication holes, so that the post-poured concrete is connected with the inner wall of the pier column segment through the communication holes.

[0009] In one embodiment, the pier column segment is provided with a connecting steel bar extending from the end thereof, and the connecting steel bars of two adjacent pier column segments are axially overlapped and lapped.

[0010] In one of the embodiments, the embedded steel pipe is provided with the connecting steel bars on both the inner and outer sides.

[0011] In one of the embodiments, the connecting flange is provided with a stiffened steel plate near the end face of the pier segment, and the stiffened steel plate connects the connecting flange and the embedded steel pipe.

[0012] In one of the embodiments, the connecting flange is provided with a connecting hole for the bolt, and the connecting hole and the stiffened steel plate are axially misaligned.

[0013] In one of the embodiments, among the adjacent two pier segments, the inner wall of the lower pier segment is provided with a bearing block, and the bearing block is provided with a slurry blocking plate.

[0014] In one of the embodiments, the outer diameter of the embedded steel pipe is greater than the inner diameter of the pier segment, and the embedded steel pipe is embedded into the side wall of the pier segment.

[0015] In one of the embodiments, the post-cast concrete in the joint between the adjacent two pier segments is flush with the outer wall of the pier segment.

[0016] In one of the embodiments, the post-cast concrete is UHPC concrete.

[0017] The connecting structure of the prefabricated assembly pier makes the prefabricated pier be able to be assembled quickly and efficiently, the prefabricated pier segments are manufactured in the factory, and the segments are assembled at the construction site, which greatly reduces the complexity of the on-site construction, improves the construction efficiency, embodies the industrialized construction and environmental protection concept. The flanges are used for temporarily connecting the piers, and then the concrete is cast for permanently connecting the piers, which can ensure the strength of the pier connection and the construction quality of the prefabricated pier. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application, the drawings used in the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] Figure 1 It is a structural schematic view of the connecting structure of the prefabricated assembly pier in one embodiment;

[0020] Figure 2 It is a structural schematic view of the connecting structure of the prefabricated assembly pier in one embodiment; Figure 1 It is a schematic view of the upper, middle and lower embedded steel pipes connected by the connecting flanges.

[0021] Figure 3 For Figure 2 Structure diagram of connecting flange;

[0022] Figure 4 For Figure 1 Sectional view of A-A line.

[0023] Reference signs:

[0024] 10-pier segment, 20-connection structure, 21-embedded steel pipe, 212-communication hole, 22-connection flange, 221-connection hole, 222-stiffened steel plate, 23-post-cast concrete, 30-bearing block, 40-sluice plate. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0026] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and the like are merely used for the purpose of explanation and are not intended to be limiting.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0028] Please refer to Figure 1 The connection structure 20 of the prefabricated assembled pier in an embodiment includes a plurality of pier segments 10 and the connection structure 20.

[0029] The plurality of pier segments 10 are sequentially assembled, and the connecting structure 20 is used to connect two adjacent pier segments 10. In an embodiment, the connecting structure 20 includes a pre-embedded steel pipe 21, a connecting flange 22, and post-poured concrete 23. The pier segment 10 is a hollow structure, and the pre-embedded steel pipe 21 is pre-embedded in the cavity of the pier segment 10. The pre-embedded steel pipe 21 is pre-embedded in the side wall of the pier segment 10.

[0030] In an embodiment, the outer diameter of the pre-embedded steel pipe 21 is greater than the inner diameter of the pier segment 10, the pre-embedded steel pipe 21 is pre-embedded into the side wall of the pier segment 10, and the pre-embedded steel pipe 21 is embedded into the pier segment 10, which can ensure the fastening of the connection between the pre-embedded steel pipe 21 and the pier segment 10. Further, the inner diameter of the pre-embedded steel pipe 21 is greater than the inner diameter of the pier segment 10, that is, the pre-embedded steel pipe 21 is entirely embedded into the side wall of the pier segment 10, which further ensures the stability of the connection between the pre-embedded steel pipe 21 and the pier segment 10.

[0031] One end of the pre-embedded steel pipe 21 protrudes out of the pier segment 10, and the protruding part of the pre-embedded steel pipe 21 out of the pier segment 10 is connected with the connecting flange 22. The connecting flange 22 is provided with a connecting hole 221, and a bolt is arranged in the connecting hole 221 to connect two adjacent connecting flanges 22 and temporarily connect two adjacent pier segments 10. In an embodiment, the inner wall and the outer wall of the connecting flange 22 both protrude beyond the side wall of the pre-embedded steel pipe 21, and the area of the connecting flange 22 is large enough to ensure the stability of the temporary connection between the pier segments 10.

[0032] On the basis of the above embodiment, further, the connecting flange 22 is provided with a stiffened steel plate 222 near the end face of the pier segment 10, the stiffened steel plate 222 connects the connecting flange 22 and the pre-embedded steel pipe 21, and a plurality of stiffened steel plates 222 are uniformly distributed around the center. The stiffened steel plate 222 can increase the connection strength between the connecting flange 22 and the pre-embedded steel pipe 21, and avoid the separation of the connecting flange 22 from the pre-embedded steel pipe 21 under the action of bending moment. The stiffened steel plate 222 and the connecting hole 221 are axially offset to avoid interference with the installation of the bolt.

[0033] The post-poured concrete 23 is filled in the pre-embedded steel pipe 21 and the joint between two adjacent pier segments 10 to permanently connect the two adjacent pier segments 10. The concrete filled in the pre-embedded steel pipe 21 can be poured from the cavity of the upper pier segment 10 downward, and the concrete in the joint between two adjacent pier segments 10 can be directly poured from the outside of the pier segment 10. The outer diameter of the connecting flange 22 is smaller than the outer diameter of the pier segment 10, so that the concrete at the joint can cover the connecting flange 22.

[0034] In an embodiment, the side wall of the embedded steel pipe 21 is provided with a plurality of communication holes 212, and the post-cast concrete 23 filled in the embedded steel pipe 21 can communicate with the inner wall of the pier column segment 10 through the communication holes 212, realizing the connection between the post-cast concrete 23 and the pier column segment 10. In an embodiment, the post-cast concrete 23 is UHPC concrete, which ensures the connection strength between the pier column segments 10.

[0035] In an embodiment, among the two adjacent pier column segments 10, the inner wall of the lower pier column segment 10 is provided with a bearing block 30, and the bearing block 30 is provided with a grout stop plate 40. The grout stop plate 40 can stop the post-cast concrete 23 in the embedded steel pipe 21, avoiding the concrete flowing out of the embedded steel pipe 21.

[0036] In an embodiment, the pier column segment 10 is provided with a connecting steel bar extending from the end thereof, and the connecting steel bars of the two adjacent pier column segments 10 overlap in the axial direction. The overlapping of the connecting steel bars of the two pier column segments 10 can connect the post-cast concretes 23 in the two embedded steel pipes 21 as a whole, ensuring the connection strength of the two pier column segments 10.

[0037] On the basis of the above-mentioned embodiments, further, the embedded steel pipe 21 is provided with a connecting steel bar on both the inner and outer sides thereof. That is, the embedded steel pipe 21 has a connecting steel bar therein, and the post-cast concrete 23 in the embedded steel pipe 21 is connected as a whole by the connecting steel bar. The embedded steel pipe 21 also has a connecting steel bar outside the joint of the pier column segment 10, ensuring that the pier column segment 10 is connected inside and outside by the connecting steel bar, and ensuring the uniformity of the strength of the joint of the pier column segment 10.

[0038] The connecting structure 20 of the prefabricated assembled pier of the above-mentioned embodiments, when the pier column segments 10 are assembled, the connecting flanges 22 of the upper and lower pier column segments 10 are connected by bolts to temporarily connect the upper and lower pier column segments 10. Then, the post-cast concrete is grouted in the embedded steel pipe 21 and the joint between the two adjacent pier column segments 10 to permanently and fixedly connect the upper and lower pier column segments 10. This makes the prefabricated pier column fast and efficient to assemble, and the pier column segments 10 are manufactured in the factory and assembled at the construction site, greatly reducing the complexity of the site construction, improving the construction efficiency, and embodying the concepts of industrialized construction and environmental protection. The flanges are temporarily connected between the pier columns, and then the concrete is poured to permanently and fixedly connect, which can ensure the strength of the connection between the pier columns and the construction quality of the prefabricated pier.

[0039] The above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A connecting structure of a precast assembly type pier, characterized by, The application relates to a pier column segment and a connecting structure. The connecting structure comprises a pre-buried steel pipe, a connecting flange and post-poured concrete. The pre-buried steel pipe is pre-buried in the cavity of the pier column segment and extends out of the pier column segment to be connected with the connecting flange. The connecting flanges of two adjacent pier column segments are connected by bolts to temporarily connect the two adjacent pier column segments.

2. The connecting structure of the prefabricated assembly pier according to claim 1, characterized in that, The post-poured concrete is filled in the pre-buried steel pipe and the joint between the two adjacent pier column segments to fixedly connect the two adjacent pier column segments.

3. The connecting structure of the prefabricated assembly pier according to claim 1, characterized in that, The side wall of the pre-buried steel pipe is provided with a plurality of communication holes to connect the post-poured concrete with the inner wall of the pier column segment.

4. The connecting structure of the prefabricated assembly pier according to claim 3, characterized in that, The pier column segment is provided with connecting steel bars extending out of the end thereof.

5. The connecting structure of the prefabricated assembly pier according to claim 1, characterized in that, The connecting steel bars of two adjacent pier column segments overlap in the axial direction.

6. The connecting structure of the prefabricated assembly pier according to claim 5, characterized in that, The pre-buried steel pipe is provided with the connecting steel bars on the inner and outer sides thereof.

7. The connecting structure of the prefabricated assembly pier according to claim 1, characterized in that, The connecting flange is provided with a stiffened steel plate close to the end face of the pier column segment.

8. The connecting structure of the prefabricated pier according to claim 1, characterized in that, The connecting flange is provided with connecting holes for the bolts.

9. The connecting structure of the prefabricated pier according to claim 1, characterized in that, The connecting holes and the stiffened steel plate are arranged in the axial direction.

10. The connecting structure of the prefabricated assembly pier according to claim 1, characterized in that, The inner wall of the lower pier column segment is provided with a bearing block and a slurry baffle plate. The outer diameter of the pre-buried steel pipe is larger than the inner diameter of the pier column segment. The post-poured concrete in the joint between two adjacent pier column segments is flush with the outer wall of the pier column segment. The post-poured concrete is UHPC concrete.

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