Prefabricated underground diaphragm wall connecting structure and connecting method thereof

Abstract

The invention relates to the technical field of underground diaphragm walls, and discloses a prefabricated underground diaphragm wall connecting structure and a connecting method thereof.The prefabricated underground diaphragm wall connecting structure comprises a prefabricated wall panel and further comprises two cylindrical grooves formed in the two end faces, in the splicing direction, of the prefabricated wall panel correspondingly; the connecting piece is composed of two cylindrical pieces which are connected with each other, and the shapes of the cylindrical pieces correspond to the shapes of the cylindrical grooves; the two arc-shaped inserting plates are oppositely arranged and fixedly installed on one end face, in the splicing direction, of the prefabricated wall panel, and arc-shaped grooves allowing the arc-shaped inserting plates to be inserted therein are formed in the other end face, in the splicing direction, of the prefabricated wall panel. According to the prefabricated underground continuous wall connecting structure, through the combined design of the cylindrical grooves and the connecting pieces, high-strength connection between the prefabricated wall plates can be guaranteed, the mounting angle is allowed to be finely adjusted in the splicing process, the connecting flexibility is improved, and the prefabricated underground continuous wall connecting structure meets the requirements of complex terrains or special building design.

Description

Technical Field

[0001] The invention relates to the technical field of underground continuous walls, in particular to a prefabricated underground continuous wall connection structure and a connection method thereof. Background Art

[0002] As an important supporting structure, underground continuous walls are widely used in foundation pit engineering, underground tunnels and groundwater treatment. Traditional underground continuous walls are usually cast on site. Although they can meet the strength and anti-seepage requirements, on-site construction is highly dependent on environmental conditions, has a long construction period and low efficiency. At present, with the diversification of engineering needs, the application of prefabricated underground continuous walls has become more and more extensive, with the advantages of short construction period, strong quality control stability and little impact on the environment.

[0003] In the practical application of prefabricated underground continuous walls, the splicing of each wall panel is the key link to achieve the continuity and stability of the overall structure. In Chinese patent CN110306532A, a chain prefabricated pile underground continuous wall is provided, by setting triangular protrusions and triangular grooves, the first prefabricated pile body and the second prefabricated pile body are aligned horizontally, and by setting the first half square groove, the second half square groove and the square steel bar frame, the gap at the connection can be handled, and then the installation block, the threaded groove and the threaded column are used to align them longitudinally, and a connection key is formed after pouring, and finally the first steel cage and the second steel cage are cast as a whole, so that the connection of the two prefabricated piles is aligned without gaps, thereby enhancing the stability of the underground continuous wall.

[0004] However, in practical applications, we have found that the above-mentioned and traditional prefabricated underground continuous wall connection structures still have certain shortcomings, such as: In some special building designs, underground continuous walls need to adapt to bending or non-linear splicing, such as bypassing underground obstacles or forming curved walls. However, traditional connection structures are usually based on rigid docking, which lacks flexibility and is difficult to achieve effective angle adjustment. Although some existing connection structures can achieve a certain angle adjustment by increasing the matching gap between the connection parts and the wall panels, too large a gap will weaken the connection strength, thereby reducing the stability of the wall and affecting the safety of the overall structure. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a prefabricated underground continuous wall connection structure and a connection method thereof, which have the advantage of being able to achieve angle adjustment while ensuring connection strength.

[0006] (II) Technical solution In order to achieve the above-mentioned purpose of being able to achieve angle adjustment while ensuring connection strength, the present invention provides the following technical solution: a prefabricated underground continuous wall connection structure, including a prefabricated wall panel, and also including: Two cylindrical grooves are respectively provided on the two end surfaces of the prefabricated wall panels along the splicing direction; A connecting member, composed of two connected cylindrical members, the shape of the cylindrical members corresponding to the shape of the cylindrical groove; Two arc-shaped plug plates are arranged opposite to each other and fixedly mounted on one end surface of the prefabricated wall panel along the splicing direction. An arc-shaped groove for inserting the arc-shaped plug plates is provided on the other end surface of the prefabricated wall panel along the splicing direction.

[0007] As a preferred technical solution of the present invention, a through groove is vertically opened on the prefabricated wall panel.

[0008] As a preferred technical solution of the present invention, the arc-shaped insert plate takes the axis center of the cylindrical groove on the end surface thereof as the virtual center.

[0009] As a preferred technical solution of the present invention, the end surface of the prefabricated wall panel along the splicing direction is a roughened surface.

[0010] As a preferred technical solution of the present invention, the columnar member is a solid cylinder, and the cross-section of the connecting member is a solid "8" shape.

[0011] As a preferred technical solution of the present invention, the columnar member is a hollow cylinder, and the cross section of the connecting member is a hollow "8" shape; The hollow cylinder is evenly provided with slurry holes.

[0012] As a preferred technical solution of the present invention, it also includes a steel cage inserted in the hollow cylinder.

[0013] As a preferred technical solution of the present invention, two arc-shaped plug plates arranged opposite to each other are both covered with air bags, and the two air bags are connected through a connecting pipe.

[0014] As a preferred technical solution of the present invention, the bottom end of the arc-shaped groove is closed and the top end is open.

[0015] (III) Beneficial effects Compared with the prior art, the present invention provides a prefabricated underground continuous wall connection structure, which has the following beneficial effects: 1. The prefabricated underground continuous wall connection structure, through the combined design of columnar grooves and connectors, can not only ensure the high-strength connection between prefabricated wall panels, but also allow fine-tuning of the installation angle during the splicing process, thereby improving the flexibility of the connection and adapting to the needs of complex terrain or special building design.

[0016] 2. The prefabricated underground continuous wall connection structure, through the design of inserting the arc plug plate in the arc groove, not only realizes the double reinforcement of the prefabricated wall panel connection, but also the arc plug plate can close both sides of the connection area, effectively avoiding joint leakage and improving the overall sealing performance of the structure.

[0017] 3. The prefabricated underground continuous wall connection structure can make the sides of the connection smoother and further ensure the sealing by wrapping the airbag on the arc-shaped plug plate. It also has a certain buffering and shock-absorbing effect and improves the deformation resistance of the wall.

[0018] 4. The prefabricated underground continuous wall connection structure adopts a roughened splicing end face design, which significantly improves the interface bonding strength after concrete pouring, thereby ensuring the overall stability of the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A top view of the connection structure of the present invention; Figure 3 It is a schematic diagram of the angle adjustment of the present invention; Figure 4 It is a partial enlarged schematic diagram of the arc groove of the present invention; Figure 5 It is a schematic diagram of the concrete pouring of the present invention; Figure 6 It is an enlarged schematic diagram of the airbag part of the present invention.

[0020] In the figure: 1. Prefabricated wall panel; 2. Through groove; 3. Columnar groove; 4. Connecting piece; 5. Steel cage; 6. Arc-shaped plug plate; 7. Arc-shaped groove; 8. Roughened surface; 9. Air bag; 10. Connecting pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Embodiment 1: See also Figure 1-Figure 5 , a prefabricated underground continuous wall connection structure, including a prefabricated wall panel 1, such as Figure 1 As shown, cylindrical grooves 3 are provided on both end surfaces of the prefabricated wall panel 1 along the splicing direction, and the connecting member 4 is composed of two connected cylindrical members, the shape of which corresponds to the shape of the cylindrical grooves 3, and is used to be inserted into the two cylindrical grooves 3, thereby connecting the two prefabricated wall panels 1.

[0024] In this embodiment, the cylindrical member can be a solid cylinder, and the cross section of the connecting member 4 is a solid "8" shape, or a hollow cylinder, and the cross section of the connecting member 4 is a hollow "8" shape. Preferably, a hollow cylindrical cylindrical member is used, and slurry holes are evenly opened on the hollow cylinder; In actual connection, two prefabricated wall panels 1 can be connected by inserting the connecting member 4 into the two cylindrical grooves 3, and the newly connected prefabricated wall panel 1 can also be rotated around the cylindrical member to adjust the angle.

[0025] In the present invention, the combined design of the columnar groove 3 and the connecting piece 4 can not only ensure the high-strength connection between the prefabricated wall panels 1, but also allow the installation angle to be fine-tuned during the splicing process, thereby improving the flexibility of the connection and adapting to the needs of complex terrain or special building design.

[0026] like Figure 2 As shown, two arc-shaped plug plates 6 arranged opposite to each other are fixedly mounted on one end face of the prefabricated wall panel 1 along the splicing direction, and the arc-shaped plug plates 6 take the axis center of the cylindrical groove 3 on the end face where the arc-shaped plug plates 6 are located as the virtual circle center, and an arc-shaped groove 7 for inserting the arc-shaped plug plates 6 is provided on the other end face of the prefabricated wall panel 1 along the splicing direction, and the curvature of the arc-shaped groove 7 corresponds to the curvature of the arc-shaped plug plates 6, and the bottom end is closed and the top end is open; When connecting, first slide the arc-shaped plug plate 6 at the end of the rear prefabricated wall panel 1 from top to bottom into the arc-shaped groove 7 of the front prefabricated wall panel 1, so that the two adjacent prefabricated wall panels 1 can be preliminarily connected, which not only realizes the double reinforcement of the connection of the prefabricated wall panels 1, but also the arc-shaped plug plate 6 can close both sides of the connection area, effectively avoiding leakage of the joint and improving the overall sealing performance of the structure.

[0027] Since both sides of the connection area are closed by the arc-shaped insert plates 6, after the connection, concrete can be poured between the two arc-shaped insert plates 6, in the columnar groove 3 and the connecting member 4 to solidify the connection.

[0028] like Figure 3 As shown, the end face of the prefabricated wall panel 1 along the splicing direction is a roughened surface 8. By adopting the roughened splicing end face design, the interface bonding strength after concrete pouring is significantly improved, and the shear resistance of the wall in long-term use is enhanced.

[0029] The design of the hollow connector 4 and the grouting holes facilitates accurate grouting to fill the connection gap, further enhancing the connection strength and anti-seepage performance, while improving construction efficiency.

[0030] Before pouring concrete, a steel cage 5 may be placed inside the hollow cylinder to further enhance the connection strength.

[0031] like Figure 1 As shown, a through groove 2 is vertically opened on the prefabricated wall panel 1, so as to achieve lightweighting of the prefabricated wall panel 1, reduce material usage and lower costs.

[0032] Embodiment 2: See also Figure 3 and Figure 6 On the basis of the first embodiment, in the present embodiment, the two relatively arranged arc-shaped plug plates 6 are both covered with airbags 9, and the two airbags 9 are connected by a connecting pipe 10. The two airbags 9 can further seal the two sides of the connection area, which not only makes the sides of the connection area smoother, but also further ensures the sealing performance. In addition, it also plays a certain buffering and shock-absorbing effect, thereby improving the deformation resistance of the wall.

[0033] When the angle is adjusted, one airbag 9 is squeezed and the other airbag 9 is inflated, thereby ensuring that both sides of the connection area can always be closed.

[0034] A pipe groove may be provided at the bottom of the middle region of the connector 4 to facilitate the passage of the connecting pipe 10 .

[0035] Embodiment three: On the basis of the first and second embodiments, this embodiment provides a method for connecting a prefabricated underground continuous wall, which specifically includes the following steps: Step 1: slide the arc-shaped insert plate 6 at the end of the rear prefabricated wall panel 1 from top to bottom into the arc-shaped groove 7 of the front prefabricated wall panel 1 to connect two adjacent prefabricated wall panels 1 at one level; Step 2: insert the connecting piece 4 into the two cylindrical grooves 3 to connect two adjacent prefabricated wall panels 1 at a secondary level; Step 3, fine-tuning the angle of the rear prefabricated wall panel 1 relative to the front prefabricated wall panel 1; Step 4: pour concrete between the two arc-shaped insert plates 6, in the cylindrical groove 3 and the connecting piece 4.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated underground continuous wall connection structure, comprising a prefabricated wall panel (1), characterized in that: Also includes: Two columnar grooves (3) are respectively formed on the two end surfaces of the prefabricated wall panel (1) along the splicing direction; A connecting member (4) composed of two connected cylindrical members, the shape of the cylindrical members corresponding to the shape of the cylindrical groove (3); Two arc-shaped inserting plates (6) are arranged opposite to each other and fixedly mounted on one end face of the prefabricated wall panel (1) along the splicing direction. An arc-shaped groove (7) for inserting the arc-shaped inserting plates (6) is provided on the other end face of the prefabricated wall panel (1) along the splicing direction.

2. The prefabricated underground continuous wall connection structure according to claim 1, characterized in that: The prefabricated wall panel (1) is provided with a through groove (2) extending vertically therethrough.

3. The prefabricated underground continuous wall connection structure according to claim 1, characterized in that: The arc-shaped insert plate (6) takes the axis center of the cylindrical groove (3) on the end surface where it is located as a virtual circle center.

4. The prefabricated underground continuous wall connection structure according to claim 1, characterized in that: The end surface of the prefabricated wall panel (1) along the splicing direction is a roughened surface (8).

5. The prefabricated underground continuous wall connection structure according to claim 1, characterized in that: The columnar member is a solid cylinder, and the cross-section of the connecting member (4) is a solid "8" shape.

6. The prefabricated underground continuous wall connection structure according to claim 1, characterized in that: The columnar member is a hollow cylinder, and the cross-section of the connecting member (4) is a hollow "8" shape; The hollow cylinder is evenly provided with slurry holes.

7. The prefabricated underground continuous wall connection structure according to claim 6, characterized in that: It also includes a steel cage (5) which is inserted into the hollow cylinder.

8. The prefabricated underground continuous wall connection structure according to claim 1, characterized in that: The two arc-shaped insert plates (6) arranged opposite to each other are both covered with air bags (9), and the two air bags (9) are connected via a connecting pipe (10).

9. The prefabricated underground continuous wall connection structure according to claim 1, characterized in that: The arc-shaped groove (7) has a closed bottom end and an open top end.

10. A prefabricated underground continuous wall connection method, used for a prefabricated underground continuous wall connection structure as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, sliding the arc-shaped insert plate (6) at the end of the rear prefabricated wall panel (1) from top to bottom into the arc-shaped groove (7) of the front prefabricated wall panel (1), thereby connecting two adjacent prefabricated wall panels (1) at one level; S2, by inserting the connecting piece (4) into the two cylindrical grooves (3), the two adjacent prefabricated wall panels (1) are connected in a secondary manner; S3, fine-tuning the angle of the rear prefabricated wall panel (1) relative to the front prefabricated wall panel (1); S4. Concrete is poured between the two arc-shaped insert plates (6), in the columnar groove (3) and in the connecting piece (4).

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