One-column-one-pile and post-poured concrete wall connecting joint in reverse construction method

Abstract

The utility model relates to the technical field of civil engineering construction structures, in particular to a reverse construction method one-column-one-pile and post-cast concrete wall connecting node which comprises a steel pipe concrete pile, a concrete wall body, a lug plate and a bow-shaped connecting plate, and the steel pipe concrete pile is provided with a connecting part located in the concrete wall body; the connecting part is provided with a toggle pin connected with the concrete wall body and a lug plate fixed with a horizontal main rib of the wall body, the lug plate comprises a bow-shaped connecting plate with a first groove, the horizontal main rib of the wall body is arranged in the first groove and fixed with the first groove, and furthermore, a clasp and a horizontal stirrup with an anchor hook can be arranged to enhance the connecting strength. The technical effect of improving the structural stability and the construction efficiency of the connecting joint is achieved.

Description

Technical Field

[0001] This application relates to the technical field of civil construction structures, and particularly to a connection node between a one-column-one-pile in the top-down method and a post-cast concrete wall. Background Art

[0002] In the technical field of civil construction, the top-down method, as a mature technical means, is widely used in high-rise buildings, underground space development and other fields. The top-down construction technology can effectively reduce the construction difficulty, improve the construction efficiency, and save costs to a certain extent.

[0003] In the construction of the underground structure of high-rise buildings, the one-column-one-pile construction is usually used as the support structure of the basement in the top-down method. It uses concrete-filled steel tubular piles, which have the advantages of strong bearing capacity and high construction efficiency. With the continuous progress of technology and the expansion of application fields, the requirements for the connection node between the one-column-one-pile and the post-cast concrete wall in the top-down method are also getting higher and higher. How to ensure the reliability and stability of the connection node during the construction process has become an important issue.

[0004] For example, in the construction of the civil air defense wall in the basement and the retaining wall at the entrance of the underground garage, the civil air defense wall or the retaining wall is a post-cast wall. The connection between it and the concrete-filled steel tubular pile can be achieved by the following means: using embedded parts for connection, fixing by welding, strengthening the connection by implanting steel bars, etc. Among them, the embedded part connection usually combines precast components with cast-in-place structures and uses the embedded connectors between the two to achieve the integrity of the structure; the welding method uses welding technology to connect the column and the wall to enhance the firmness of the connection part; implanting steel bars means reserving a certain length of steel bars before concrete pouring and then carrying out connection operations after the concrete hardens to ensure the tight connection of the two structures.

[0005] Although these means can meet the connection requirements to a certain extent, there are still certain limitations in actual applications. During actual use, problems such as single connection method and poor uniformity of steel bar stress often lead to insufficient stability of the connection node. Especially in complex geological conditions, the connection node may loosen, crack and other phenomena, thus affecting the safety and stability of the entire structure. Therefore, how to improve the stability of the connection node between the concrete-filled steel tubular pile and the post-cast concrete wall in the top-down method has become an urgent technical problem to be solved. Summary of the Invention

[0006] This application provides a connection node between a one-column-one-pile in the top-down method and a post-cast concrete wall, which can effectively ensure the stability of the connection between the concrete wall and the concrete-filled steel tubular pile, thereby improving the construction quality. The following technical solutions are adopted:

[0007] A connection node between a one-column-one-pile in the top-down construction method and a post-cast concrete wall, comprising a concrete-filled steel tube pile, a concrete wall, and gusset plates; and the concrete-filled steel tube pile has a connection part located within the concrete wall.

[0008] Studs are provided on the connection part, and the studs are connected to the concrete wall; gusset plates are also provided on the concrete-filled steel tube pile, the concrete wall has horizontal main wall reinforcement bars, and the horizontal main wall reinforcement bars are fixedly connected to the gusset plates.

[0009] By adopting the above technical solution, the horizontal main wall reinforcement bars are connected to the concrete-filled steel tube pile through the gusset plates, thereby enhancing the integrity of the two. At the same time, studs are provided on the concrete-filled steel tube pile. When the concrete wall is poured, the concrete can form a grip force on the studs, thereby further enhancing the integrity of the concrete wall and the concrete-filled steel tube pile, and increasing the connection strength and stability.

[0010] Preferably, the gusset plate includes a bow-shaped connecting plate, the bow-shaped connecting plate has a first groove, and the horizontal main wall reinforcement bars are arranged in the first groove and fixedly connected to the bow-shaped connecting plate.

[0011] By adopting the above technical solution, the horizontal main wall reinforcement bars are placed in the first groove, thereby increasing the contact area between the gusset plate and the horizontal main wall reinforcement bars. At the same time, during welding, the top and bottom of the horizontal main wall reinforcement bars can be welded to the bow-shaped connecting plate, thereby further enhancing the connection strength.

[0012] Preferably, it further includes a batten, one end of the batten is fixedly connected to the horizontal main wall reinforcement bar, and the other end extends to the bow-shaped connecting plate and is fixedly connected to the bow-shaped connecting plate;

[0013] The bow-shaped connecting plate has a second groove, the first groove and the second groove are respectively located on both sides of the bow-shaped connecting plate, and the batten is arranged in the second groove.

[0014] By adopting the above technical solution, battens are provided and the method of batten welding is used to reinforce the gusset plate and the horizontal main wall reinforcement bars. At the same time, the horizontal main wall reinforcement bars and the battens are respectively placed in the first groove and the second groove, which can effectively enhance the connection strength between the battens and the bow-shaped connecting plate.

[0015] Preferably, a concrete composite layer is provided on the periphery of the concrete-filled steel tube pile, the concrete composite layer has horizontal stirrups, the horizontal stirrups are arranged around the concrete-filled steel tube pile and fixedly connected to the gusset plates;

[0016] The concrete composite layer is integrally cast with the concrete wall.

[0017] By adopting the above technical solution, the concrete-filled steel tube pile is fixed by the horizontal stirrups, and at the same time, the horizontal stirrups can be connected to the horizontal main reinforcement of the wall through the ear plates, so as to enhance the integration. The integral casting of the concrete overlay layer and the concrete wall can further enhance the integrity of the concrete wall and the concrete-filled steel tube pile.

[0018] Preferably, the ear plate further includes a straight plate, which is arranged on one side of the bow-shaped connecting plate and fixedly connected to the bow-shaped connecting plate; a through hole for the horizontal stirrup to pass through is provided on the straight plate, and the horizontal stirrup is fixedly connected to the straight plate, and the fixed connection position is at the through hole.

[0019] By adopting the above technical solution, the setting of the straight plate can enhance the overall structural strength of the ear plate, making the ear plate have stronger bending and shear resistance. In addition, the setting of the through hole can contribute to the welding of the horizontal stirrup and the straight plate, thereby enhancing the integrity of the ear plate and the horizontal stirrup.

[0020] Preferably, the horizontal stirrup extends into the concrete wall and is fixedly connected to the horizontal main reinforcement of the wall.

[0021] By adopting the above technical solution, the connection strength and structural stability between the horizontal stirrup and the concrete wall can be further enhanced.

[0022] Preferably, anchor hooks are further provided on the horizontal stirrup, and the horizontal stirrup is connected to the horizontal main reinforcement of the wall through the anchor hooks.

[0023] By adopting the above technical solution, the setting of the anchor hooks can pre-fix the relative position between the horizontal stirrup and the horizontal main reinforcement of the wall, facilitating subsequent welding work.

[0024] Preferably, the anchor hook includes a connecting sleeve and a steel hook. The connecting sleeve is sleeved on the horizontal stirrup, the steel hook is fixedly connected to the connecting sleeve, the steel hook has a hook-shaped part and is hooked to the horizontal main reinforcement of the wall, and both the horizontal main reinforcement of the wall and the horizontal stirrup are welded to the steel hook.

[0025] By adopting the above technical solution, first connect the steel hook to the horizontal stirrup through the sleeve, and then hook the steel hook on the horizontal main reinforcement of the wall, so as to realize the relative fixation between the horizontal stirrup and the horizontal main reinforcement of the wall, thus facilitating subsequent welding work.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects:

[0027] 1. The horizontal main reinforcement of the wall is connected to the concrete-filled steel tube pile through the ear plate, enhancing the integrity of the two. At the same time, the stud bolts enhance the bond strength between the concrete wall and the concrete-filled steel tube pile, improving the connection strength and stability;

[0028] 2. The first groove design of the bow-shaped connecting plate increases the contact area between the horizontal main reinforcement of the wall and the ear plate. During welding, the top and bottom of the horizontal main reinforcement of the wall can be welded to the bow-shaped connecting plate, enhancing the connection strength.

[0029] 3. The setting of the tie bars and the reinforcement of the ear plate and the horizontal main reinforcement of the wall by welding the tie bars. The horizontal main reinforcement of the wall and the tie bars are respectively placed in the first groove and the second groove, improving the connection strength between the tie bars and the bow-shaped connecting plate. Description of the Drawings

[0030] Figure 1 is a schematic structural view of the connection node between a column with a single pile and a post-cast concrete wall in an embodiment of the present application;

[0031] Figure 2 is a sectional view of the connection node between a column with a single pile and a post-cast concrete wall in an embodiment of the present application;

[0032] Figure 3 is a schematic structural view for showing the connection relationship among the ear plate, the horizontal main reinforcement of the wall, and the horizontal stirrups.

[0033] Reference numerals in the drawings: 1, concrete-filled steel tubular pile; 11, stud; 2, concrete wall; 21, horizontal main reinforcement of the wall; 22, tie bar; 3, ear plate; 31, bow-shaped connecting plate; 311, first groove; 312, second groove; 32, straight plate; 4, concrete composite layer; 41, horizontal stirrup; 42, construction longitudinal reinforcement; 43, anchor hook; 431, connecting sleeve; 432, steel hook. Detailed Embodiment

[0034] The following will Figures 1-3 further describe the present invention in detail with reference to the attached drawings.

[0035] The inventors of the present application found that in the field of civil construction technology, the top-down method, as a mature technical means, is widely used in high-rise buildings, underground space development and other fields. The top-down construction technology can effectively reduce the construction difficulty, improve the construction efficiency, and save costs to a certain extent. Especially in high-rise buildings and deep foundation pit support projects, the application of the top-down method helps to improve the safety and stability of the building structure, so it is favored by the industry.

[0036] In the construction of the underground structure of high-rise buildings, the construction of one pile and one column is usually used as the support structure of the basement in the top-down construction method. The steel pipe concrete pile 1 is adopted, which has the advantages of strong bearing capacity and high construction efficiency. With the continuous progress of technology and the expansion of application fields, the requirements for the connection nodes between one column and one pile and the post-cast concrete wall in the top-down method are getting higher and higher. How to ensure the reliability and stability of the connection nodes during the construction process has become an important issue. For this reason, the present application mainly adopts the following solutions to achieve the stability of the connection between the concrete wall and the steel pipe concrete pile 1, thereby improving the construction quality.

[0037] Specifically, referring to Figure 1 , a connection node between one column and one pile and the post-cast concrete wall provided by an embodiment of the present application includes a steel pipe concrete pile 1, a concrete wall 2, and a gusset plate 3.

[0038] Referring to Figure 1 and Figure 2 , the steel pipe concrete pile 1 has a connection part, and stud bolts 11 are arranged on the connection part. Both the connection part and the stud bolts 11 are located inside the concrete wall 2. The arrangement of the stud bolts 11 can effectively improve the connection strength between the steel pipe concrete pile 1 and the concrete wall 2.

[0039] Inside the concrete wall 2, there are wall horizontal main reinforcement bars 21 and longitudinal reinforcement bars. The longitudinal reinforcement bars and the horizontal main reinforcement bars work together to form a steel reinforcement cage to ensure the strength of the concrete wall 2. An ear plate 3 is welded on the side wall of the steel pipe concrete pile 1. The ear plate 3 is as high as the concrete wall 2, and the wall horizontal main reinforcement bar 21 is welded to the ear plate 3, thereby realizing the connection between the wall horizontal main reinforcement bar 21 and the steel pipe concrete pile 1.

[0040] Referring to Figure 3 , specifically, the ear plate 3 is composed of an arch-shaped connecting plate 31 and a straight plate 32. The straight plate 32 is arranged in parallel with the arch-shaped connecting plate 31 and welded together as a whole. On the side of the arch-shaped connecting plate 31 facing away from the straight plate 32, there is a first groove 311, and on the side facing the straight plate 32, there is a second groove 312. When the wall horizontal main reinforcement bar 21 is welded to the ear plate 3, its end needs to extend into the first groove 311 and be welded to the arch-shaped connecting plate 31 as a whole.

[0041] Furthermore, in order to improve the connection strength between the wall horizontal main reinforcement bar 21 and the ear plate 3, a tie bar 22 is also arranged between them. One end of the tie bar 22 is welded to the wall horizontal main reinforcement bar 21, and the other end extends to the inside of the second groove 312 and is welded to the arch-shaped connecting plate 31 as a whole.

[0042] To enhance the integrity between the concrete wall 2 and the concrete-filled steel tubular pile 1, thereby improving the connection strength and the structural stability, a concrete composite layer 4 is also provided on the circumferential side of the concrete-filled steel tubular pile 1. The concrete composite layer 4 is provided with horizontal stirrups 41 and structural longitudinal bars 42 inside. The structural longitudinal bars 42 and the horizontal stirrups 41 form a steel reinforcement cage and surround the circumferential side of the concrete-filled steel tube. Among them, the horizontal stirrups 41 are arranged around the concrete-filled steel tubular pile 1 and both ends thereof are welded to the ear plate 3. In order to improve the connection strength between the horizontal stirrup 41 and the ear plate 3, through holes for the horizontal stirrup 41 to pass through are provided on the straight plate 32, and welding is carried out around the circumferential side of the horizontal stirrup 41 at the through holes.

[0043] The concrete composite layer 4 is integrally cast with the concrete wall 2, so that the concrete-filled steel tubular pile 1 and the concrete wall 2 form an integral connection.

[0044] Refer to Figure 2 and Figure 3 In addition, the end of the horizontal stirrup 41 also extends into the concrete wall 2 and is fixedly connected to the horizontal main reinforcement 21 of the wall. Thus, by passing the horizontal stirrup 41 through the inside of the concrete wall 2 and welding it to the horizontal main reinforcement 21 of the wall, the stability of the overall structure is enhanced by establishing an anchoring connection.

[0045] To facilitate the connection between the horizontal stirrup 41 and the horizontal main reinforcement 21 of the wall, anchor hooks 43 are also provided on the horizontal stirrup 41. Specifically, the anchor hook 43 is composed of a connecting sleeve 431 and a steel hook 432. The connecting sleeve 431 is sleeved on the horizontal stirrup 41, and the steel hook 432 is integrally connected with the connecting sleeve 431. Both the horizontal main reinforcement 21 of the wall and the horizontal stirrup 41 are welded and fixed to the steel hook 432. The steel hook 432 can be in an "L" shape or a "U" shape, and a good connection effect can also be achieved.

[0046] Therefore, when connecting the horizontal stirrup 41 and the horizontal main reinforcement 21 of the wall, first hook the steel hook 432 to the horizontal main reinforcement 21 of the wall, then sleeve the connecting sleeve 431 on the horizontal stirrup 41 to keep the horizontal stirrup 41 and the horizontal main reinforcement 21 of the wall fixed, and then weld the steel hook 432 to the horizontal stirrup 41 and the horizontal main reinforcement 21 of the wall respectively to connect them into one body.

[0047] The implementation principle of this embodiment is as follows: The horizontal main reinforcement 21 of the wall is connected to the concrete-filled steel tubular pile 1 through the ear plate 3, which improves the integrity of the two. At the same time, the stud 11 provided on the concrete-filled steel tubular pile 1 can form a grip force during the pouring of the concrete wall 2, further improving the integrity between the concrete wall 2 and the concrete-filled steel tubular pile 1, and increasing the connection strength and stability. The design of the ear plate 3 ensures the stability of the connection point under the action of force, effectively avoiding problems such as loosening and cracking of the connection node.

[0048] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A connection node between a single column and a single pile in the top-down construction method and a post-cast concrete wall, characterized in that, It includes a concrete-filled steel tube pile (1), a concrete wall (2), and gusset plates (3); and the concrete-filled steel tube pile (1) has a connecting part which is located inside the concrete wall (2). Studs (11) are provided on the connecting part, and the studs (11) are connected to the concrete wall (2); gusset plates (3) are also provided on the concrete-filled steel tube pile (1), the concrete wall (2) has horizontal main wall reinforcement bars (21), and the horizontal main wall reinforcement bars (21) are fixedly connected to the gusset plates (3).

2. The connecting node of the inverse construction method of one column with one pile and the post-cast concrete wall according to claim 1, wherein The gusset plates (3) include bow-shaped connecting plates (31), the bow-shaped connecting plates (31) have first grooves (311), and the horizontal main wall reinforcement bars (21) are arranged in the first grooves (311) and fixedly connected to the bow-shaped connecting plates (31).

3. The connection node between the inverse construction single column and single pile and the post-cast concrete wall according to claim 2, wherein It also includes tie bars (22), one end of the tie bars (22) is fixedly connected to the horizontal main wall reinforcement bars (21), and the other end extends to the bow-shaped connecting plates (31) and is fixedly connected to the bow-shaped connecting plates (31). Second grooves (312) are formed on the bow-shaped connecting plates (31), the first grooves (311) and the second grooves (312) are respectively located on both sides of the bow-shaped connecting plates (31), and the tie bars (22) are arranged in the second grooves (312).

4. The connection node between the inverse construction one-column-one-pile and the post-cast concrete wall according to claim 2, characterized in that, A concrete composite layer (4) is provided on the circumferential side of the concrete-filled steel tube pile (1), the concrete composite layer (4) has horizontal stirrups (41), the horizontal stirrups (41) are arranged around the concrete-filled steel tube pile (1) and fixedly connected to the gusset plates (3). The concrete composite layer (4) is integrally cast with the concrete wall (2).

5. The connection node between the inverse construction single column and single pile and the post-cast concrete wall according to claim 4, characterized in that, The gusset plates (3) also include straight plates (32), the straight plates (32) are arranged on one side of the bow-shaped connecting plates (31) and fixedly connected to the bow-shaped connecting plates (31); through holes for the horizontal stirrups (41) to pass through are provided on the straight plates (32), the horizontal stirrups (41) are fixedly connected to the straight plates (32), and the position of the fixed connection is at the through holes.

6. The connection node between the inverse construction single column and single pile and the post-cast concrete wall according to claim 4, characterized in that, The horizontal stirrups (41) extend into the interior of the concrete wall (2) and are fixedly connected to the horizontal main wall reinforcement bars (21).

7. The connection node between the top-down one-column-one-pile and the post-cast concrete wall according to claim 6, characterized in that Anchor hooks (43) are also provided on the horizontal stirrups (41), and the horizontal stirrups (41) are connected to the horizontal main wall reinforcement bars (21) through the anchor hooks (43).

8. The connection node between the inverse construction one-column-one-pile and the post-cast concrete wall according to claim 7, characterized in that, The anchor hooks (43) include connecting sleeves (431) and steel hooks (432), the connecting sleeves (431) are sleeved on the horizontal stirrups (41), the steel hooks (432) are fixedly connected to the connecting sleeves (431), the steel hooks (432) have hook-shaped parts and are hooked to the horizontal main wall reinforcement bars (21), and both the horizontal main wall reinforcement bars (21) and the horizontal stirrups (41) are welded to the steel hooks (432).

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