Connecting joint structure with cast-in-place pile serving as vertical structural column

Abstract

The utility model relates to the technical field of building structures, and provides a connecting joint structure with a cast-in-place pile serving as a vertical structural column, which comprises the cast-in-place pile, a steel bar planting group, a ring beam arranged outside the cast-in-place pile in a sleeving manner, a column cap arranged outside the ring beam in a sleeving manner, and a plurality of frame beams arranged on the peripheral side of the column cap, the embedded steel bar group comprises a plurality of anchoring embedded steel bars, the anchoring embedded steel bars are arranged at intervals in the circumferential direction of the cast-in-place pile, one ends of the anchoring embedded steel bars penetrate through the cast-in-place pile and are connected with the cast-in-place pile, and the other ends of the anchoring embedded steel bars penetrate through the ring beam and are connected with the ring beam; the column cap is arranged outside the cast-in-place pile in a sleeving mode and connected to the cast-in-place pile, and a mounting cavity for containing the ring beam is formed in the column cap. The multiple frame beams are arranged around the cast-in-place pile in the circumferential direction at intervals, each frame beam comprises a frame beam rib, and one end of each frame beam rib extends into the ring beam along the column cap and is connected with the ring beam. According to the invention, stress concentration at the connection node is further weakened.

Description

Technical Field

[0001] This application relates to the technical field of building structures, and particularly to a connection node structure for bored piles serving as vertical structural columns. Background Art

[0002] The top-down construction method is an underground engineering construction technique applicable to the central urban area, which can reduce the impact of construction on the surrounding environment. In top-down construction, usually the top-down slab is constructed first, and then this slab is used as the construction working surface to excavate downward to form the basement space. The vertical structural columns of the top-down slab are an important part of top-down construction. The vertical structural columns can serve as temporary supports to bear the upper load and ensure the stability during construction. The vertical structural columns transfer the load of the upper structure to the ground, which is the key path for structural force transfer. In basement construction, the vertical structural columns of the top-down slab can serve as spatial partitions to provide structural support for different functional areas. However, when connecting the previously constructed vertical structural columns with the subsequently constructed basement floor slabs, stress concentration will occur at the connection nodes, resulting in premature fatigue or damage at the connection nodes.

[0003] In the current construction method, by welding a ring beam and a frame beam outside the vertical structural column to form an integral frame system, the overall stiffness and stability of the structure are enhanced. The load received by the floor slab can be more effectively transferred to the vertical structural column and then to the foundation by the vertical structural column. However, simply setting the ring beam and the frame beam still makes it difficult to evenly transfer the load received by the floor slab to the vertical structural column. Summary of the Utility Model

[0004] In order to further reduce the stress concentration at the connection nodes, this application provides a connection node structure for bored piles serving as vertical structural columns.

[0005] This application provides a connection node structure for bored piles serving as vertical structural columns, adopting the following technical solutions:

[0006] A connection node structure for bored piles serving as vertical structural columns includes a bored pile, a group of anchored rebars, a ring beam sleeved outside the bored pile, a column cap sleeved outside the ring beam, and a plurality of frame beams arranged on the periphery of the column cap;

[0007] The group of anchored rebars includes a plurality of anchored rebars, which are circumferentially arranged at intervals around the bored pile. One end of each anchored rebar penetrates into the bored pile and is connected to the bored pile, and the other end penetrates into the ring beam and is connected to the ring beam;

[0008] The column cap is sleeved and connected outside the bored pile, and an installation cavity for accommodating the ring beam is provided inside the column cap;

[0009] A plurality of the frame beams are circumferentially and spacedly arranged around the cast-in-place pile. The frame beam includes frame beam reinforcement bars, and one end of the frame beam reinforcement bars extends along the column cap into the ring beam and is connected to the ring beam.

[0010] By adopting the above technical solution, after the floor slab is constructed around the circumferential side of the frame beam, the load of the floor slab can be sequentially transmitted along the paths of the frame beam, the column cap, the ring beam, the anchored reinforcing bars, and the cast-in-place pile. Since the ring beam wraps the cast-in-place pile, and the column cap evenly distributes the concentrated load transmitted by the frame beam on the cast-in-place pile, finally the floor slab load can be evenly transmitted to multiple anchored reinforcing bars, so as to achieve the purpose that multiple anchored reinforcing bars jointly bear the floor slab load, thereby effectively reducing the stress concentration at the connection node and improving the stability and bearing capacity of the overall structure.

[0011] Optionally, the cast-in-place pile includes an anti-slip pile section, and the ring beam is arranged on the anti-slip pile section.

[0012] By adopting the above technical solution, the design of the anti-slip pile section can increase the roughness of the surface of the cast-in-place pile, so that the concrete can better adhere to the cast-in-place pile during pouring, forming a stronger adhesive force.

[0013] Optionally, it further includes a bearing platform structure and a floor slab structure. The bearing platform structure is located on one side of the ring beam, and the floor slab structure is sleeved outside the bearing platform structure and is connected to the bearing platform structure.

[0014] By adopting the above technical solution, the bearing platform structure and the floor slab structure provide a more stable foundation for the entire structure, ensuring the overall bearing capacity of the structure.

[0015] Optionally, the cast-in-place pile includes a vertical cage framework, and the vertical cage framework is provided with embedded connectors and water stop rings. The embedded connectors are used to connect the water stop rings to the vertical cage framework.

[0016] By adopting the above technical solution, the cast-in-place pile is formed by pouring the vertical cage framework. The embedded connectors are embedded on the vertical cage framework, providing connection sites for the installation of the water stop rings on the cast-in-place pile to ensure the stable connection of the water stop rings on the cast-in-place pile; and the water stop rings improve the waterproof performance at the connection node between the floor slab and the cast-in-place pile.

[0017] Optionally, the embedded connector includes an embedded sleeve and a connecting bar arranged inside the embedded sleeve. The connecting bar penetrates through the vertical cage framework and is fixedly connected to the vertical cage framework.

[0018] By adopting the above technical solution, the embedded sleeve is connected to the vertical cage framework through the connecting bar. The connecting bar penetrates into the interior of the vertical cage framework, making the connection between the embedded connector and the vertical cage framework more firm, ensuring the safety and stability of the structure.

[0019] Optionally, the water stop ring is sleeved and connected outside the embedded sleeve, and the water stop ring includes two water stop arc strips arranged oppositely, and the water stop arc strips are fixed on the outer side wall of the embedded sleeve.

[0020] By adopting the above technical solution, the water stop ring is indirectly installed and fixed on the cast-in-place pile through the embedded sleeve. The water stop ring includes two water stop arc strips arranged oppositely. When installing the water stop ring, the two water stop arc strips can be respectively installed oppositely on both sides of the embedded casing to realize the sleeving of the water stop ring on the embedded sleeve, so as to simplify the installation operation of the water stop ring.

[0021] Optionally, a water swelling strip is also arranged at the connection between the water stop ring and the embedded sleeve.

[0022] By adopting the above technical solution, the water swelling strip will expand when it comes into contact with water, thereby filling the gap between the connection of the water stop ring and the embedded sleeve, and further improving the waterproof performance.

[0023] Optionally, a waterproof layer and a steel mesh layer are arranged outside the vertical cage framework.

[0024] By adopting the above technical solution, the design of the waterproof layer and the steel mesh layer not only enhances the durability of the cast-in-place pile, but also greatly improves its waterproof and bearing capacity.

[0025] Optionally, a roughened surface is arranged on the outer side wall of the anti-slip pile section.

[0026] By adopting the above technical solution, the roughness of the surface of the cast-in-place pile is increased through the arrangement of the roughened surface, so that the concrete can be better bonded with the cast-in-place pile during pouring, forming a stronger bonding force.

[0027] In summary, the present application includes at least one of the following beneficial effects:

[0028] 1. The cast-in-place pile in the present application is provided with a reinforcing bar group, a ring beam sleeved outside the cast-in-place pile, a column cap sleeved outside the ring beam, and a plurality of frame beams arranged on the periphery of the column cap. After building the floor around the frame beam, the load of the floor can be sequentially transmitted along the frame beam, the column cap steel bars, the ring beam steel bars, the anchored reinforcing bars, and the cast-in-place pile, realizing that multiple anchored reinforcing bars jointly bear the floor load, effectively reducing the stress concentration at the connection node, and improving the stability and bearing capacity of the structure;

[0029] 2. The cast-in-place pile includes an anti-slip pile section. The design of the anti-slip pile section can increase the roughness of the surface of the cast-in-place pile, so that the concrete can be better bonded with the cast-in-place pile during pouring, forming a stronger bonding force;

[0030] 3. The vertical cage framework is provided with embedded connectors and a water stop ring. The embedded connectors are embedded into the vertical cage framework, providing connection sites for the installation of the water stop ring on the cast-in-place pile to ensure the stable connection of the water stop ring to the cast-in-place pile. The water stop ring improves the waterproof performance of the connection node between the floor slab and the cast-in-place pile. Description of the Drawings

[0031] Figure 1 is the overall structural schematic diagram of the connection node structure of a cast-in-place pile serving as a vertical structural column in an embodiment of the present application;

[0032] Figure 2 is the cross-sectional structural schematic diagram of the cast-in-place pile showing the distribution of the waterproof layer and the steel mesh layer in an embodiment of the present application;

[0033] Figure 3 is the top view structural schematic diagram of an embodiment of the present application;

[0034] Figure 4 is the cross-sectional structural schematic diagram of the cast-in-place pile showing the distribution of the connecting bars in an embodiment of the present application;

[0035] Description of the Reference Numerals: 1, cast-in-place pile; 11, anti-slip pile section; 12, vertical cage framework; 13, waterproof layer; 14, steel mesh layer; 2, anchored reinforcing bars; 3, ring beam; 31, ring beam steel bars; 4, column cap; 41, installation cavity; 42, column cap steel bars; 5, frame beam; 51, frame beam steel bars; 6, pile cap structure; 61, pile cap steel bars; 7, floor slab structure; 71, floor slab cushion; 72, floor slab steel bars; 8, embedded connector; 81, embedded sleeve; 82, connecting bar; 9, water stop ring; 91, water stop arc strip; 92, water-swellable strip; 10, floor slab. Detailed Description of the Embodiment

[0036] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0037] A connection node structure of a cast-in-place pile serving as a vertical structural column provided by an embodiment of the present application, referring to Figure 1 , includes a cast-in-place pile 1, a group of reinforcing bars, a ring beam 3, a column cap 4, and a plurality of frame beams 5. The cast-in-place pile 1 serves as the foundation of the entire structure, extending deep into the ground to provide stable support. Referring to Figure 1 and Figure 2, the cast-in-place pile 1 further includes a vertical cage framework 12. Outside the vertical cage framework 12, a waterproof layer 13 and a steel mesh layer 14 are specifically fixed, and both the waterproof layer 13 and the steel mesh layer 14 surround the vertical cage framework 12. The distribution range of the waterproof layer 13 and the steel mesh layer 14 outside the vertical cage framework 12 is determined according to construction needs. The vertical cage framework 12 is specifically set as a cylindrical framework structure, and the cast-in-place pile 1 is obtained by pouring concrete into the vertical cage framework 12. The waterproof layer 13 is specifically made of geotextile. In this embodiment, the steel mesh layer 14 is provided with two layers, the waterproof layer 13 is provided with one layer, and the waterproof layer 13 is located between the two steel mesh layers 14.

[0038] Refer to Figure 1 , the implanted bar group includes a plurality of anchored implanted bars 2, and these anchored implanted bars 2 are arranged at intervals around the circumference of the cast-in-place pile 1. One end of the anchored implanted bar 2 penetrates into the vertical cage framework 12 and is welded or fixed to the vertical cage framework 12 by wire ropes before the cast-in-place pile 1 is poured. The cast-in-place pile 1 includes an anti-slip pile section 11, and the ring beam 3 is arranged on the anti-slip pile section 11. A roughened surface is processed on the outer side wall of the anti-slip pile section 11. The design of the anti-slip pile section 11 can increase the roughness of the surface of the cast-in-place pile 1, so that the concrete can better adhere to the cast-in-place pile 1 during pouring, forming a stronger adhesive force. The implanted bar group is also arranged on the anti-slip pile section 11. Specifically, the implanted bar group is arranged in three groups at equal intervals along the length direction of the anti-slip pile section 11. The ring beam 3 is specifically set as a ring-shaped reinforced concrete beam including ring beam steel bars 31, and the end of the anchored implanted bar 2 far from the cast-in-place pile 1 penetrates into the ring beam 3 and is fixedly connected to the ring beam steel bars 31.

[0039] Refer to Figure 1 and Figure 3 , the column cap 4 is sleeved outside the ring beam 3 and is tightly connected to the ring beam 3. An installation cavity 41 is arranged inside the column cap 4, and the installation cavity 41 is for the ring beam 3 to be accommodated. The column cap 4 includes a plurality of column cap steel bars 42. In this embodiment, the column cap 4 is specifically set as a rectangular hollow steel bar cage. A plurality of frame beams 5 are arranged at intervals around the circumference of the cast-in-place pile 1. In this embodiment, the frame beams 5 are arranged at equal intervals around the circumference of the cast-in-place pile 1 in four. Each frame beam 5 includes frame beam steel bars 51. One end of the frame beam steel bars 51 extends along the column cap 4 into the ring beam 3. The end of the frame beam steel bars 51 extending into the ring beam 3 is bent and inserted into the ring beam 3 and is connected to the ring beam steel bars 31.

[0040] After the floor slab 10 is constructed on the frame beam 5, the load of the floor slab 10 can be transmitted sequentially along the path of the frame beam 5, the column cap 4, the ring beam 3, the anchored reinforcing bars 2, and the cast-in-place pile 1. Since the ring beam 3 completely wraps the cast-in-place pile 1, and the column cap 4 evenly distributes the concentrated load transmitted by the frame beam 5 to the cast-in-place pile 1, finally the load of the floor slab 10 can be evenly transmitted to multiple anchored reinforcing bars 2. This design realizes the purpose of multiple anchored reinforcing bars 2 jointly bearing the load of the floor slab 10, thereby effectively reducing the stress concentration at the connection nodes and greatly improving the stability and load-bearing capacity of the overall structure.

[0041] Refer to Figure 1 , there are multiple anti-slip pile segments 11 on the cast-in-place pile 1, and the number of anti-slip pile segments 11 is determined according to the number of floor slabs 10 and bottom slabs to be constructed. Each anti-slip pile segment 11 is provided with a set of reinforcing bars. There is also a pile cap structure 6 and a bottom slab structure 7 on the cast-in-place pile 1. The pile cap structure 6 is closely sleeved outside an anti-slip pile segment 11 of the cast-in-place pile 1; the bottom slab structure 7 is sleeved outside the pile cap structure 6 and is closely connected to the pile cap structure 6. The pile cap structure 6 and the bottom slab structure 7 provide a more stable foundation for the entire structure, further ensuring the integrity and load-bearing capacity of the structure. The pile cap structure 6 includes pile cap steel bars 61, and the bottom slab structure 7 includes a bottom slab cushion 71 and bottom slab steel bars 72. The bottom slab cushion 71 is located at the bottom of the bottom slab steel bars 72; and the bottom slab steel bars 72 are fixed to the pile cap steel bars 61 by welding or wire rope bundling.

[0042] Refer to Figure 1 and Figure 4 , there are also embedded connectors 8 and water stop rings 9 provided on the cast-in-place pile 1. Specifically, the embedded connector 8 includes an embedded sleeve 81 and multiple connecting bars 82 fixed on the inner side wall of the embedded sleeve 81. One end of the connecting bar 82 is inserted into the vertical cage skeleton 12 and is fixedly connected to the vertical cage skeleton 12. This design makes the connection between the embedded connector 8 and the vertical cage skeleton 12 more firm, thereby ensuring the safety and stability of the structure. In this embodiment, the connecting bar 82 is specifically set as a U-shaped shear-resistant bar.

[0043] The water stop ring 9 mainly includes two relatively arranged water stop arc strips 91, and these two water stop arc strips 91 are both fixed on the outer side wall of the embedded sleeve 81. When installing the water stop ring 9, the two water stop arc strips 91 can be respectively welded and fixed relatively on both sides of the embedded sleeve 81 to surround the embedded sleeve 81. This design greatly simplifies the installation operation of the water stop ring 9. At the connection between the water stop ring 9 and the embedded sleeve 81, a water-swelling strip 92 is also fixed. The water-swelling strip 92 surrounds the outer periphery of the embedded sleeve 81. The water-swelling strip 92 will rapidly expand when it comes into contact with water, thereby effectively filling any gaps between the connection of the water stop ring 9 and the embedded sleeve 81. This design further improves the waterproof performance of the structure.

[0044] The implementation principle of this embodiment is as follows: Through reasonable structural design, especially the cooperation of the post-inserted bars group, the ring beam 3, the column cap 4 and the frame beam 5, the uniform transfer of the load of the floor slab 10 is realized, and the stress concentration at the connection nodes is effectively reduced. At the same time, by adding the bearing platform structure 6, the bottom plate structure 7 and the waterproof design, the stability and waterproof performance of the structure are further improved.

[0045] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A connection node structure in which a cast-in-place pile also serves as a vertical structural column, characterized in that: It comprises a cast-in-place pile (1), a reinforcement group, a ring beam (3) sleeved outside the cast-in-place pile (1), a column cap (4) sleeved outside the ring beam (3), and a plurality of frame beams (5) arranged around the column cap (4); The anchor bar group comprises a plurality of anchor bars (2), the plurality of anchor bars (2) being arranged at intervals around the cast-in-place pile (1), one end of the anchor bar (2) being passed through the cast-in-place pile (1) and connected to the cast-in-place pile (1), and the other end of the anchor bar (2) being passed through the ring beam (3) and connected to the ring beam (3); The column cap (4) is sleeved and connected to the outside of the cast-in-place pile (1), and a mounting cavity (41) for accommodating the ring beam (3) is provided inside the column cap (4); A plurality of frame beams (5) are arranged at intervals in the circumferential direction around the cast-in-place pile (1), and the frame beam (5) comprises frame beam ribs (51), one end of the frame beam ribs (51) extending along the column cap (4) into the ring beam (3) and connected to the ring beam (3).

2. The connection node structure of the cast-in-place pile serving as a vertical structural column according to claim 1, characterized in that: The cast-in-place pile (1) comprises an anti-slip pile section (11), and the ring beam (3) is arranged on the anti-slip pile section (11).

3. The connection node structure of the cast-in-place pile also serving as a vertical structural column according to claim 1, characterized in that: It also comprises a capping structure (6) and a bottom plate structure (7), wherein the capping structure (6) is sleeved on one end of the cast-in-place pile (1), and the bottom plate structure (7) is sleeved outside the capping structure (6) and connected to the capping structure (6).

4. The connection node structure of the cast-in-place pile also serving as a vertical structural column according to claim 1, characterized in that: The cast-in-place pile (1) comprises a vertical cage frame (12), and the vertical cage frame (12) is provided with a pre-embedded connecting piece (8) and a water stop ring (9), wherein the pre-embedded connecting piece (8) is used to connect the water stop ring (9) to the vertical cage frame (12).

5. The connection node structure of the cast-in-place pile serving as a vertical structural column according to claim 4 is characterized in that: The embedded connection piece (8) comprises an embedded sleeve (81) and a connection rib (82) disposed inside the embedded sleeve (81); the connection rib (82) is passed through the vertical cage frame (12) and is fixedly connected to the vertical cage frame (12).

6. The connection node structure of the cast-in-place pile also serving as a vertical structural column according to claim 5, characterized in that: The water stop ring (9) is sleeved and connected to the outside of the embedded sleeve (81), and the water stop ring (9) comprises two water stop arc strips (91) arranged opposite to each other, and the water stop arc strips (91) are fixed on the outer side wall of the embedded sleeve (81).

7. The connection node structure of the cast-in-place pile also serving as a vertical structural column according to claim 5, characterized in that: A water-expandable strip (92) is also provided at the connection between the water stop ring (9) and the embedded sleeve (81).

8. The connection node structure of the cast-in-place pile also serving as a vertical structural column according to claim 4, characterized in that: A waterproof layer (13) and a steel mesh layer (14) are provided outside the vertical cage frame (12).

9. The connection node structure of the cast-in-place pile also serving as a vertical structural column according to claim 2, characterized in that: The outer side wall of the anti-slip pile section (11) is provided with a roughened surface.

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