Prefabricated concrete thin plate and steel pipe fast assembling connection structure and manufacturing method thereof

Abstract

The application relates to a quick assembling and connecting structure of fabricated concrete thin plates and steel pipes and a manufacturing method thereof, which comprises prefabricated concrete thin plates, steel pipes and connecting buckles. The prefabricated concrete thin plates are vertically arranged, the steel pipes are located below the prefabricated concrete thin plates and are parallel to the bottoms of the prefabricated concrete thin plates. The connecting buckles comprise left buckles and right buckles, the left buckles and the right buckles are connected to the outer circumferential sides of the steel pipes in a butt joint mode, the upper ends of the left buckles and the right buckles are connected to the prefabricated concrete thin plates through upper connecting pieces, and the lower ends of the left buckles and the right buckles are connected through lower connecting pieces. The outer sides of the connecting buckles are cast with outer wrapped concrete. The application has the advantages of reasonable structure design, reserved advantages of the buried arch method, realized quick assembling and connecting of the prefabricated concrete thin plates and the steel pipes, convenient construction, shortened construction period, improved structural size precision and quality and the like.

Description

Technical fields:

[0002] This invention relates to a prefabricated concrete thin slab and steel pipe quick assembly connection structure and its manufacturing method. Background technology:

[0004] Concrete arch bridges constructed using the embedded arch frame method have advantages over reinforced concrete arch bridges, such as lighter weight and larger span. Compared to steel arch bridges, they offer advantages such as less steel consumption, better fire resistance, and higher structural rigidity. The specific process involves overlapping steel pipes to form an embedded arch frame, using this frame as a support to pour concrete base slabs, webs, and top slabs, forming a concrete box-slab arch or box-rib arch. However, for large-span concrete arch bridges, the amount of concrete encasing the embedded arch frame becomes enormous with the increasing span. This necessitates segmented construction, leading to long construction periods and complex effects of concrete shrinkage and creep at different ages on the structural stress. This has become a pressing issue for the development of large-span concrete arch bridges. To address this, a proposed method uses several independently placed, discontinuously connected precast concrete thin slabs to replace the traditional cast-in-place reinforced concrete web. This effectively eliminates the adverse effects of large shrinkage in cast-in-place concrete, reduces the amount of concrete poured, shortens the on-site construction period, and lowers labor costs. Summary of the Invention:

[0006] The purpose of this invention is to provide a quick assembly connection structure for prefabricated thin concrete slabs and steel pipes and its manufacturing method. The design is reasonable and can realize the quick assembly connection of prefabricated thin concrete slabs and steel pipes.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a prefabricated concrete thin slab and steel pipe quick assembly connection structure, including a prefabricated concrete thin slab, a steel pipe and connecting clips. The prefabricated concrete thin slab is vertically arranged, and the steel pipe is located below the prefabricated concrete thin slab and parallel to the bottom of the prefabricated concrete thin slab. The connecting clips include a left clip and a right clip, which are joined together and encircle the outer periphery of the steel pipe. The upper ends of the left clip and the right clip are connected to the prefabricated concrete thin slab through an upper connector, and the lower ends of the left clip and the right clip are connected through a lower connector. The outer side of the connecting clips is encased in concrete.

[0008] Furthermore, both the left and right buckles include an upper straight plate, a middle arc plate, and a lower straight plate arranged sequentially from top to bottom. The inner arc surface of the middle arc plate is used to cooperate with the steel pipe. The upper straight plates of the left and right buckles are connected to the precast concrete slab through an upper connector, and the lower straight plates of the left and right buckles are connected to each other through a lower connector.

[0009] Furthermore, the upper straight plate has several first bolt holes at both its front and rear ends, which are distributed vertically. The upper straight plates of the left and right buckles are located on the left and right sides of the precast concrete slab, respectively. The lower end of the precast concrete slab has reserved bolt holes corresponding to the positions of the first bolt holes. The upper connector includes an upper high-strength bolt, which passes through the first bolt holes and reserved bolt holes of the upper straight plates of the left and right buckles. A pair of first locking nuts are screwed onto the upper high-strength bolt, which are located on the left and right sides of the precast concrete slab, respectively.

[0010] Furthermore, the lower straight plate has second bolt holes at both the front and rear ends; the lower connector includes a lower high-strength bolt, which passes through the second bolt holes on the lower straight plate of the left and right buckles, and a pair of second locking nuts are screwed onto the lower high-strength bolt.

[0011] Furthermore, rubber gaskets are provided between the middle arc plate of the left and right buckles and the steel pipe.

[0012] Furthermore, the left and right buckles are provided with transverse stiffening ribs and vertical stiffening ribs on the side facing away from the precast concrete slab.

[0013] Furthermore, the precast concrete slab is internally reinforced with steel bars.

[0014] Furthermore, the radius of the intermediate arc plate is 1-2 mm larger than the radius of the steel pipe.

[0015] Another technical solution adopted in this invention is: a method for manufacturing a prefabricated concrete thin slab and steel pipe quick assembly connection structure, comprising the following steps:

[0016] Step S1: Prefabricate steel pipes in the factory and then transport them to the construction site;

[0017] Step S2: Precast concrete slabs are manufactured in the factory and transported to the construction site after the concrete slabs have cured to the required strength.

[0018] Step S3: Install rubber gaskets at the connection points between the steel pipe and the precast concrete slab;

[0019] Step S4: Place the rubber washers on the inner side of the middle arc plate of the left and right buckles respectively;

[0020] Step S5: Align the left and right clips of the connecting buckle around the outer periphery of the steel pipe, pass the lower high-strength bolt through the second bolt hole of the lower straight plate of the connecting buckle, and connect the left and right clips by tightening a pair of second locking nuts, thereby fixing the connecting buckle to the steel pipe;

[0021] Step S6: Place the precast concrete slab, pass the upper high-strength bolts through the reserved bolt holes at the lower end of the concrete slab and the first bolt holes on the straight plate of the connecting buckle, and connect the precast concrete slab and the connecting buckle by tightening a pair of first locking nuts, thereby connecting the precast concrete slab and the steel pipe into a common load-bearing body.

[0022] Step S7: Pour outer concrete on the outside of the connecting buckle, so that the precast concrete slab and the steel pipe are completely solidified into a whole.

[0023] Compared with the prior art, the present invention has the following advantages: The present invention has a reasonable structural design, which not only retains the advantages of the embedded arch frame method, but also enables the rapid assembly and connection of precast concrete thin slabs and steel pipes, and has the advantages of convenient construction, shortened construction period, and improved structural dimensional accuracy and quality. Attached image description:

[0025] Figure 1 This is a schematic diagram of the front cross-sectional structure of an embodiment of the present invention;

[0026] Figure 2 This is a side view of the structure according to an embodiment of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the left buckle in an embodiment of the present invention;

[0028] Figure 4 This is a three-dimensional structural diagram of a precast concrete thin slab in an embodiment of the present invention.

[0029] In the picture:

[0030] 1-Precast concrete slab; 2-Connecting clip; 3-Steel pipe; 4-Left clip; 5-Right clip; 6-Upper high-strength bolt; 7-Lower high-strength bolt; 8-Rubber washer; 9-Vertical stiffening rib; 10-Transverse stiffening rib; 11-First bolt hole; 12-Pre-drilled bolt hole; 13-Second bolt hole; 14-First locking nut; 15-Second locking nut; 16-Outer concrete wrapping; 21-Upper straight plate; 22-Middle arc plate; 23-Lower straight plate. Detailed implementation method:

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] like Figures 1-4 As shown, this invention discloses a prefabricated concrete thin slab and steel pipe quick assembly connection structure, including a prefabricated concrete thin slab 1, a steel pipe 3, and connecting clips 2. The prefabricated concrete thin slab 1 is vertically arranged, and the steel pipe 3 is located below the prefabricated concrete thin slab 1 and parallel to the bottom of the prefabricated concrete thin slab 1. The connecting clips 2 include a left clip 4 and a right clip 5, which are joined together and encircle the outer periphery of the steel pipe 3. The upper ends of the left clip 4 and the right clip 5 are connected to the prefabricated concrete thin slab 1 through an upper connector, and the lower ends of the left clip 4 and the right clip 5 are connected through a lower connector, thereby fixing the connecting clips 2 to the steel pipe 3, thus connecting the prefabricated concrete thin slab 1 and the steel pipe 3 into a common load-bearing body. An outer layer of concrete 16 is poured on the outside of the connecting clips 2, so that the prefabricated concrete thin slab 1 and the steel pipe 3 are completely solidified into a whole. This connection structure has a reasonable structural design, which not only retains the advantages of the embedded arch frame method, but also enables the rapid assembly and connection of precast concrete thin slabs and steel pipes. It has advantages such as convenient construction, shortened construction period, and improved structural dimensional accuracy and quality.

[0035] In this embodiment, the left buckle 4 and the right buckle 5 have the same structure, specifically including an upper straight plate 21, a middle arc plate 22 and a lower straight plate 23 arranged sequentially from top to bottom. The inner arc surface of the middle arc plate 22 is used to cooperate with the steel pipe 3. The upper straight plates 21 of the left buckle 4 and the right buckle 5 are located on the left and right sides of the precast concrete thin plate 1, respectively, and are connected to the precast concrete thin plate 1 through an upper connector. The lower straight plates 23 of the left buckle 4 and the right buckle 5 are connected through a lower connector, thereby fixing the connecting buckle 2 to the steel pipe 3.

[0036] In this embodiment, the upper straight plate 21 has several first bolt holes 11 at both its front and rear ends, and the several first bolt holes 11 are distributed vertically. The upper straight plates 21 of the left buckle 4 and the right buckle 5 are located on the left and right sides of the precast concrete slab 1, respectively. The lower end of the precast concrete slab 1 is provided with reserved bolt holes 12 corresponding to the positions of the first bolt holes 11. The upper connector includes an upper high-strength bolt 6 corresponding to the number of first bolt holes 11. The upper high-strength bolt 6 passes through the first bolt holes 11 of the upper straight plates 21 of the left buckle 4 and the right buckle 5 and the reserved bolt holes 12 of the precast concrete slab 1. A pair of first locking nuts 14 are screwed onto the upper high-strength bolt 6. The pair of first locking nuts 14 are located on the left and right sides of the precast concrete slab 1, respectively, to lock the upper straight plates 21 of the left buckle 4 and the right buckle 5 onto the precast concrete slab 1.

[0037] In this embodiment, the lower straight plate 23 has second bolt holes 13 at both the front and rear ends; the lower connector includes a lower high-strength bolt 7, which passes through the second bolt holes 13 on the lower straight plate 23 of the left buckle 4 and the right buckle 5. A pair of second locking nuts 15 are screwed onto the lower high-strength bolt 7. The pair of second locking nuts 15 are located on the left and right sides of the lower straight plate connecting the buckle 2, so as to lock the lower straight plate 23 of the left buckle 4 and the right buckle 5 together.

[0038] In this embodiment, rubber washers 8 are provided between the middle arc plate of the left buckle 4 and the right buckle 5 and the steel pipe, and the bottom of the precast concrete thin plate 1 abuts against the rubber washers 8. By providing rubber washers, slippage between the steel pipe and the connecting buckles can be prevented.

[0039] In this embodiment, the left buckle 4 and the right buckle 5 are welded with a transverse stiffening rib 10 and a vertical stiffening rib 9 on the side opposite to the precast concrete thin plate 1 to improve the rigidity of the connecting buckles.

[0040] In this embodiment, a certain number of reinforcing bars can be arranged inside the precast concrete slab 1 according to the stress requirements.

[0041] In this embodiment, the radius of the intermediate arc plate 22 is slightly larger than the radius of the steel pipe 3 by 1 to 2 mm, which is for placing the rubber gasket.

[0042] In this embodiment, the precast concrete slab 1 is industrially prefabricated and then transported to the construction site for assembly, thereby reducing the amount of on-site concrete pouring.

[0043] In this embodiment, the dimensions of the precast concrete slab 1 and the steel pipe 3 are determined according to the specific structural form and construction conditions.

[0044] In this embodiment, the precast concrete slab 1 can be made of high-strength concrete, ultra-high-performance concrete or other types of high-performance fiber concrete.

[0045] In this embodiment, the upper high-strength bolt 6 and the lower high-strength bolt 7 of the connecting buckle 2 can act as connecting keys, improving the connection performance between the connecting buckle and the outer concrete.

[0046] In this embodiment, the steel pipe can be connected to the precast concrete slab via several parallel connecting clips. Preferably, the cross-section of the steel pipe is circular.

[0047] In this embodiment, the method for manufacturing the prefabricated concrete thin slab and steel pipe quick assembly connection structure includes the following steps:

[0048] Step S1: Prefabricate steel pipe 3 in the factory, and then transport steel pipe 3 to the construction site;

[0049] Step S2: Precast concrete slab 1 is manufactured in the factory and transported to the construction site after the precast concrete slab 1 has been cured to the required strength.

[0050] Step S3: Install rubber gaskets 8 at the connection point between the steel pipe and the precast concrete slab 1;

[0051] Step S4: Place the rubber gaskets 8 on the inner side of the middle arc plate 22 of the left buckle 4 and the right buckle 5 respectively;

[0052] Step S5: Connect the left buckle 4 and right buckle 5 of the connecting buckle 2 and wrap them around the outer periphery of the steel pipe 3. Pass the lower high-strength bolt 7 through the second bolt hole 13 of the lower straight plate 23 of the connecting buckle 2. Connect the left buckle 4 and right buckle 5 by tightening a pair of second locking nuts 15, thereby fixing the connecting buckle 2 to the steel pipe 3.

[0053] Step S6: Place the precast concrete slab 1, pass the upper high-strength bolt 6 through the reserved bolt hole 12 at the lower end of the concrete slab 1 and the first bolt hole 11 of the straight plate 21 on the connecting buckle 2, and connect the precast concrete slab 1 and the connecting buckle 2 by tightening a pair of first locking nuts 14, thereby connecting the precast concrete slab 1 and the steel pipe 3 into a common load-bearing body.

[0054] Step S7: Pour outer concrete 16 on the outside of the connecting buckle 2 to completely solidify the precast concrete slab 1 and the steel pipe 3 into a whole.

[0055] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured by casting) (except where it is obviously impossible to use an integral molding process).

[0056] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0057] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A prefabricated concrete thin slab and steel pipe rapid assembly connection structure, characterized in that: The device includes a precast concrete slab, a steel pipe, and connecting clips. The precast concrete slab is vertically arranged, and the steel pipe is located below the precast concrete slab and parallel to its bottom. The connecting clips include a left clip and a right clip, which are joined together and encircle the outer periphery of the steel pipe. The upper ends of the left and right clips are connected to the precast concrete slab via an upper connector, and the lower ends are connected via a lower connector. The outer side of the connecting clips is encased in concrete. Both the left and right buckles include an upper straight plate, a middle arc plate, and a lower straight plate arranged sequentially from top to bottom. The inner arc surface of the middle arc plate is used to cooperate with the steel pipe. The upper straight plates of the left and right buckles are connected to the precast concrete slab through an upper connector, and the lower straight plates of the left and right buckles are connected to each other through a lower connector. The upper straight plate has several first bolt holes at both its front and rear ends, and these first bolt holes are distributed vertically. The upper straight plates of the left and right buckles are located on the left and right sides of the precast concrete slab, respectively. The lower end of the precast concrete slab has reserved bolt holes corresponding to the positions of the first bolt holes. The upper connector includes an upper high-strength bolt, which passes through the first bolt holes and reserved bolt holes of the upper straight plates of the left and right buckles. A pair of first locking nuts are screwed onto the upper high-strength bolt, and the pair of first locking nuts are located on the left and right sides of the precast concrete slab, respectively. The lower straight plate has second bolt holes at both the front and rear ends; the lower connector includes a lower high-strength bolt, which passes through the second bolt holes on the lower straight plate of the left and right buckles, and a pair of second locking nuts are screwed onto the lower high-strength bolt; The upper and lower high-strength bolts of the connecting clip can act as connecting keys, improving the connection performance between the connecting clip and the outer concrete.

2. The prefabricated concrete thin slab and steel pipe rapid assembly connection structure according to claim 1, characterized in that: Rubber gaskets are provided between the middle arc plate of the left and right buckles and the steel pipe.

3. The prefabricated concrete thin slab and steel pipe rapid assembly connection structure according to claim 1, characterized in that: The left and right buckles are provided with transverse stiffening ribs and vertical stiffening ribs on the side facing away from the precast concrete slab.

4. The prefabricated concrete thin slab and steel pipe rapid assembly connection structure according to claim 1, characterized in that: The precast concrete slab is reinforced with steel bars.

5. The prefabricated concrete thin slab and steel pipe rapid assembly connection structure according to claim 1, characterized in that: The radius of the intermediate arc plate is 1-2 mm larger than the radius of the steel pipe.

6. A method for manufacturing a prefabricated concrete thin slab and steel pipe quick assembly connection structure as described in claim 2, characterized in that: It includes the following steps: Step S1: Prefabricate steel pipes in the factory and then transport them to the construction site; Step S2: Precast concrete slabs are manufactured in the factory and transported to the construction site after the concrete slabs have cured to the required strength. Step S3: Install rubber gaskets at the connection points between the steel pipe and the precast concrete slab; Step S4: Place the rubber washers on the inner side of the middle arc plate of the left and right buckles respectively; Step S5: Align the left and right clips of the connecting buckle around the outer periphery of the steel pipe, pass the lower high-strength bolt through the second bolt hole of the lower straight plate of the connecting buckle, and connect the left and right clips by tightening a pair of second locking nuts, thereby fixing the connecting buckle to the steel pipe; Step S6: Place the precast concrete slab, pass the upper high-strength bolts through the reserved bolt holes at the lower end of the concrete slab and the first bolt holes on the straight plate of the connecting buckle, and connect the precast concrete slab and the connecting buckle by tightening a pair of first locking nuts, thereby connecting the precast concrete slab and the steel pipe into a common load-bearing body. Step S7: Pour outer concrete on the outside of the connecting buckle, so that the precast concrete slab and the steel pipe are completely solidified into a whole.

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