Prefabricated underground diaphragm wall with self-clamping column type connectors capable of being assembled

Abstract

The invention relates to the technical field of building structures, and discloses a self-clamping column type connector assembly type prefabricated underground diaphragm wall which comprises a prefabricated wall body, a steel bar expansion unit and a pouring locking unit. The multiple pairs of insertion covers used for assembling are not located on the same straight line, the multiple pairs of insertion covers can form a triangle, the structural strength of the connecting position of equipment can be improved through the triangle, when the structure is subjected to external force such as wind force and earthquake force, the triangle shape can effectively resist deformation, and compared with a structure with connecting points on the same straight line, the structure is more convenient to assemble. The connecting points distributed in a non-linear mode can enable the structure to be more stable and not prone to distortion or collapse, after the inserting cover and the inserting hole are assembled, the expanded steel bars can be rotated at the moment, the expanded steel bars located on the side portion of the inserting cover are moved to a machining station, and therefore the expanded steel bars and longitudinal steel bars are arranged in the pouring cavity at the moment, and the machining efficiency is improved. And therefore, the position becomes firmer after pouring.

Description

Technical Field

[0001] The invention belongs to the technical field of building structures, and in particular relates to an assembleable prefabricated underground continuous wall with self-clamping column type joints. Background Art

[0002] In building construction, underground continuous wall is a commonly used form of foundation enclosure structure. The current wall assembly method requires pouring at the assembly location to achieve a stable connection after assembly.

[0003] However, there are many problems with the existing connection positions. On the one hand, there is no steel bar, which greatly affects the stability of the structure, making the underground continuous wall prone to deformation or even fracture when subjected to large pressure, tension or lateral force, reducing the safety and reliability of the building. On the other hand, during the pouring and solidification process, the two walls need to be supported all the time to prevent the walls from moving, which not only consumes a lot of manpower and material resources and increases construction costs, but also seriously affects the pouring effect once the wall moves, resulting in loose wall connections and gaps, which in turn affects the waterproofness and integrity of the entire underground continuous wall.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A self-clamping column joint assembled prefabricated underground continuous wall comprises a prefabricated wall body and a steel bar expansion unit and a casting locking unit installed on both sides of the prefabricated wall body.

[0006] The steel bar expansion unit comprises three pairs of plug covers, the three pairs of the plug covers are installed on the side walls of the prefabricated wall, and the three pairs of the plug covers are not in the same vertical plane, and a plurality of pairs of longitudinal steel bars are installed on the end faces of the three pairs of the plug covers, one end of the longitudinal steel bars is placed in the inner cavity of the plug covers, and a top rod is movably installed on each pair of the plug covers, and one end of the top rod is movably inserted in a positioning sleeve installed inside the plug covers, a stopper is slidably arranged inside the positioning sleeve, and one end of the stopper is connected to the top rod, and a push rod is rotatably installed on the other end of the stopper, and a synchronous bracket is installed on the push rod, and a synchronous plate is installed on the synchronous bracket, and four pairs of flip plates are rotatably installed around each pair of the plug covers, and a plurality of pairs of extended steel bars are installed on each pair of the flip plates, and a rocker arm is installed at the rotation center of the flip plate, and the rocker arm is slidably connected to the synchronous plate, and the synchronous plate slides horizontally to drive the rocker arm and the extended steel bar to rotate ninety degrees, and one end of the extended steel bar rotated ninety degrees is placed in the inner cavity of the plug cover; The casting locking unit includes a positioning plate, which is elliptical and matches with a locking groove provided on the side wall at the other end of the prefabricated wall, and a shield is connected to the locking groove, an elliptical through hole is installed on the shield, and the elliptical through hole matches with the positioning plate, and the plug cover matches with a casting chamber provided on the side wall of the prefabricated wall, a connecting pipe is installed on the positioning sleeve, the center of the connecting pipe and the block are not on the same straight line, and the connecting pipe is connected with the locking cavity provided on the inner wall of the block, and a plurality of pairs of baffles are installed around the inside of the locking cavity.

[0007] As a preferred embodiment of the present invention, a mounting plate is welded on the side wall of the plug cover, and the mounting plate is cast integrally with the prefabricated wall. A through hole is opened on the plug cover, and the through hole is communicated with the internal chamber of the plug cover.

[0008] As a preferred embodiment of the present invention, a first connecting sleeve is installed through the end face of the plug-in cover, a corresponding longitudinal steel bar is movably inserted inside the first connecting sleeve, a first locking bolt is rotatably installed on the first connecting sleeve, and the end of the first locking bolt is tightly fitted with the longitudinal steel bar, and the length of the longitudinal steel bar located on the outside of the plug-in cover is less than the length of the top rod located on the outside of the plug-in cover.

[0009] As a preferred embodiment of the present invention, the stopper fits tightly with the inner wall of the positioning sleeve, and a return spring is provided on the side wall of the push rod located in the inner cavity of the positioning sleeve, one end of the return spring is clamped on the inner wall of the positioning sleeve, and the other end of the return spring is clamped on the side wall of the stopper.

[0010] As a preferred embodiment of the present invention, a second connecting sleeve is welded on each pair of flip plates, an extended steel bar is movably inserted and inserted inside the second connecting sleeve, a second locking bolt is screwed and installed on the surface of the second connecting sleeve, and the bottom of the second locking bolt is tightly fitted with the extended steel bar.

[0011] As a preferred embodiment of the present invention, a pair of fixing rods are installed on the surface of each pair of flip plates, and fixing seats are rotatably installed at the ends of the pair of fixing rods. The fixing seats are welded on the surface of the plug-in cover, and a torsion spring is installed on the rotation center of the fixing rods. One end of the torsion spring is clamped on the fixing seat, and the other end of the torsion spring is clamped on the fixing rod.

[0012] As a preferred embodiment of the present invention, a pair of rocker arms are installed on the rotating shafts of the fixed rods, and the rocker arms move through the notches opened on the surface of the plug cover. The pair of rocker arms are in an inclined state, and a pair of rocker arms have strip grooves opened on their surfaces. Slide rods are slidably arranged on the strip grooves, and the slide rods are connected to the synchronization plate, and the synchronization plate is placed in the gap between the pair of rocker arms.

[0013] As a preferred embodiment of the present invention, three pairs of jacks are provided on the side walls of the prefabricated wall, each pair of the jacks is interconnected with the corresponding casting chamber, and the diameter of the jacks is smaller than the diameter of the plug cover, and casting passages are connected between several pairs of the casting chambers. A casting port is provided on the top of the prefabricated wall, and the casting port is interconnected with the casting chamber at the top.

[0014] As a preferred embodiment of the present invention, a blocking block is installed inside the locking groove, and the blocking block is used to limit the rotation angle of the positioning plate.

[0015] As a preferred embodiment of the present invention, the connecting tube movably penetrates the plug cover, a receiving hopper is installed on the top of the connecting tube, a positioning rod is installed on the outer shell of the receiving hopper, and the positioning rod is connected to the side wall of the plug cover, and the width of the connecting tube is greater than the length of the locking cavity.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The several pairs of plug covers used for assembly of the present invention are not in the same straight line, and the several pairs of plug covers can form a triangle. The structural strength of the equipment connection can be improved by the triangle. When the structure is subjected to external forces, such as wind force and earthquake force, the triangular shape can effectively resist deformation. Compared with the structure with the connection points in the same straight line, the connection points distributed in a non-linear manner can make the structure more stable and will not easily twist or collapse. Moreover, when the connection points are not in the same straight line, the natural frequency and vibration mode of the building structure become more complicated. Different distributions of connection points will cause the structure to have different stiffness distributions, making it difficult for the structure to completely match the frequency of the seismic wave under the action of the seismic wave, thereby reducing the possibility of resonance and making it safer to use. Moreover, after the plug cover and the socket are assembled, the extended steel bar can complete the rotation operation, so that the extended steel bar located on the side of the plug cover is moved to the casting station, so that the extended steel bar and the longitudinal steel bar are present in the casting chamber at this time, thereby making the position more secure after casting.

[0017] During the pouring process of the present invention, a part of the poured concrete falls along the connecting pipe, and finally a part of the concrete can fall onto the baffle, while the concrete unloading position and the rotation center of the baffle are not in the same straight line, and finally the baffle at this time will rotate, and the baffle will drive the baffle at this time to rotate, and the baffle drives the top rod to rotate, and at this time the top rod drives the positioning plate to rotate, and at this time the positioning plate can rotate in the locking groove, and finally the positioning plate is clamped in the locking groove, so that the two assembled prefabricated walls are in a locked state, and then when the concrete solidifies, the two prefabricated walls will not move, ensuring that the poured concrete can reach the required strength.

[0018] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the attached picture: Figure 1 It is a three-dimensional structural schematic diagram of a prefabricated underground continuous wall with self-clamping column joints; Figure 2 It is a schematic diagram of the lateral structure of a prefabricated underground continuous wall with self-clamping column joints; Figure 3 A three-dimensional diagram of a plug-in cover of a self-clamping column joint assembled prefabricated underground continuous wall; Figure 4 It is a cross-sectional view of the plug cover of a prefabricated underground continuous wall that can be assembled with self-clamping column joints; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 A cross-sectional view of the positioning sleeve of a self-clamping column joint assembled prefabricated underground continuous wall Figure 1 ; Figure 7 A cross-sectional view of the positioning sleeve of a self-clamping column joint assembled prefabricated underground continuous wall Figure 2 ; Figure 8 A side view of a prefabricated wall of a self-clamping column joint assembled prefabricated underground continuous wall; Fig. 9 It is a partial cross-sectional view of a prefabricated underground continuous wall with self-clamping column joints; Fig.10 for Fig. 9 Enlarged view of point B in the middle.

[0020] In the figure: 101. Prefabricated wall; 200, steel bar extension unit; 201, plug cover; 2011, mounting plate; 2012, through hole; 2013, notch; 202, longitudinal steel bar; 2021, first connecting sleeve; 2022, first locking bolt; 203, push rod; 2031, positioning sleeve; 2032, stopper; 2033, push rod; 2034, synchronous bracket; 2035, slide rod; 2036, reset spring; 2037, synchronous plate; 204, flip plate; 2041, second connecting sleeve; 2042, second locking bolt; 2043, extension steel bar; 2044, fixing rod; 2045, fixing seat; 2046, torsion spring; 2047, rocker arm; 2048, strip groove; 300, casting locking unit; 301, positioning plate; 302, socket; 3021, casting chamber; 3022, casting passage; 3023, casting port; 303, locking groove; 3031, shield plate; 3032, elliptical through hole; 3033, blocking block; 304, locking chamber; 3041, baffle; 3042, connecting pipe; 3043, receiving hopper; 3044, positioning rod. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0022] Embodiment 1, as Figures 1 to 10 As shown, a self-clamping column joint assembled prefabricated underground continuous wall includes a prefabricated wall 101 and a steel bar expansion unit 200 and a casting locking unit 300 installed on both sides of the prefabricated wall 101.

[0023] The steel bar expansion unit 200 includes three pairs of plug covers 201, which are installed on the side walls of the prefabricated wall 101, and the three pairs of plug covers 201 are not in the same vertical plane. A plurality of pairs of longitudinal steel bars 202 are installed on the end faces of the three pairs of plug covers 201, and one end of the longitudinal steel bars 202 is placed in the inner cavity of the plug cover 201. A top rod 203 is movably installed on each pair of plug covers 201, and one end of the top rod 203 is movably plugged into a positioning sleeve 2031 installed inside the plug cover 201. A stopper 2032 is slidably arranged inside the positioning sleeve 2031, and one end of the stopper 2032 is connected to the top rod 203, and the other end of the stopper 2032 is rotated. A push rod 2033 is dynamically installed, and a synchronous bracket 2034 is installed on the push rod 2033, and a synchronous plate 2037 is installed on the synchronous bracket 2034, four pairs of flip plates 204 are rotatably installed around each pair of plug covers 201, and several pairs of extended steel bars 2043 are installed on each pair of flip plates 204, and a rocker arm 2047 is installed at the rotation center of the flip plate 204, and the rocker arm 2047 is slidably connected with the synchronous plate 2037, and the synchronous plate 2037 slides horizontally to drive the rocker arm 2047 and the extended steel bar 2043 to rotate ninety degrees, and one end of the extended steel bar 2043 rotated ninety degrees is placed in the inner cavity of the plug cover 201. When the two prefabricated walls 101 are relatively plugged in, the top rod 203 will be squeezed, and the top rod 203 drives the block 2032 to slide inside the positioning sleeve 2031, thereby driving the push rod 2033 and the synchronous bracket 2034 to slide, and the synchronous plate 2037 on the synchronous bracket 2034 drives the rocking arm 2047 to rotate, and the flip plate 204 on the rocking arm 2047 drives the extended steel bar 2043 to rotate, so that the extended steel bar 2043 becomes a vertical state. At this time, the longitudinal steel bars 202 and the extended steel bars 2043 improve the structural strength of the casting position, and a part of the extended steel bars 2043 and the longitudinal steel bars 202 are located inside the plug cover 201, so that after the plug cover 201 is cast later, the plug cover 201 and the outer layer of concrete can be tightly connected together, which is convenient for improving the structural strength after casting.

[0024] The casting locking unit 300 includes a positioning plate 301, which is elliptical in shape, and the positioning plate 301 is adapted to the locking groove 303 opened on the side wall of the other end of the prefabricated wall 101, and a shielding plate 3031 is connected to the locking groove 303, and an elliptical through hole 3032 is installed on the shielding plate 3031, and the elliptical through hole 3032 is adapted to the positioning plate 301, and the plug cover 201 is adapted to the casting chamber 3021 opened on the side wall of the prefabricated wall 101, and a connecting pipe 3042 is installed on the positioning sleeve 2031, the center of the connecting pipe 3042 and the stopper 2032 are not on the same straight line, and the connecting pipe 3042 is connected to the locking cavity 304 opened on the inner wall of the stopper 2032, and a plurality of pairs of baffles 3041 are installed around the locking cavity 304. During the pouring process, a part of the poured concrete falls along the connecting pipe 3042, and finally a part of the concrete can fall on the baffle 3041. However, the concrete unloading position and the rotation center of the block 2032 are not on the same line. Finally, the baffle 3041 will rotate, and the baffle 3041 will drive the block 2032 to rotate, and the block 2032 drives the top rod 203 to rotate. At this time, the top rod 203 drives the positioning plate 301 to rotate. At this time, the positioning plate 301 can rotate in the locking groove 303. Finally, the positioning plate 301 is clamped in the locking groove 303, so that the two assembled prefabricated walls 101 are in a locked state. When the concrete solidifies, the two prefabricated walls 101 will not move, ensuring that the poured concrete can reach the required strength.

[0025] like Figures 1 to 10 As shown, in a specific embodiment, a mounting plate 2011 is welded to the side wall of the plug cover 201, and the mounting plate 2011 is cast integrally with the prefabricated wall 101. A through hole 2012 is provided on the plug cover 201, and the through hole 2012 is communicated with the internal chamber of the plug cover 201. The prefabricated wall 101 and the plug cover 201 can be firmly connected together through the mounting plate 2011, and the through hole 2012 facilitates the flow of concrete poured later, so that the interior of the plug cover 201 is filled with concrete.

[0026] like Figures 1 to 10 As shown, further, a first connecting sleeve 2021 is installed through the end surface of the plug cover 201, and a corresponding longitudinal steel bar 202 is movably inserted inside the first connecting sleeve 2021. A first locking bolt 2022 is rotatably installed on the first connecting sleeve 2021, and the end of the first locking bolt 2022 is tightly fitted with the longitudinal steel bar 202. The first locking bolt 2022 and the first connecting sleeve 2021 are used to position and lock the longitudinal steel bar 202. The length of the longitudinal steel bar 202 located on the outside of the plug cover 201 is less than the length of the top rod 203 located on the outside of the plug cover 201. During the installation process, the top rod 203 can be first squeezed with the assembled prefabricated wall 101, and the top rod 203 will be compressed and moved inward.

[0027] Embodiment 2, based on embodiment 1 and different from this embodiment, is as follows: Figures 1 to 10 As shown, the stopper 2032 is closely fitted with the inner wall of the positioning sleeve 2031, and a return spring 2036 is sleeved on the side wall of the push rod 2033 located in the inner cavity of the positioning sleeve 2031, one end of the return spring 2036 is clamped on the inner wall of the positioning sleeve 2031, and the other end of the return spring 2036 is clamped on the side wall of the stopper 2032. When the push rod 203 moves along the positioning sleeve 2031, the stopper 2032 at the end of the push rod 203 slides synchronously, and the stopper 2032 squeezes the internal return spring 2036 at this time, and the return spring 2036 facilitates the subsequent reset operation.

[0028] like Figures 1 to 10 As shown, in a specific embodiment, a second connecting sleeve 2041 is welded on each pair of flip plates 204, an extended steel bar 2043 is movably inserted and inserted inside the second connecting sleeve 2041, a second locking bolt 2042 is screwed and installed on the surface of the second connecting sleeve 2041, and the bottom of the second locking bolt 2042 is tightly fitted with the extended steel bar 2043, and the second locking bolt 2042 and the second connecting sleeve 2041 fix the extended steel bar 2043.

[0029] like Figures 1 to 10 As shown, further, a pair of fixed rods 2044 are installed on the surface of each pair of flip plates 204, and a fixed seat 2045 is rotatably installed at the end of the pair of fixed rods 2044, and the fixed seat 2045 is welded and set on the surface of the plug cover 201. A torsion spring 2046 is installed on the rotation center of the fixed rod 2044, and one end of the torsion spring 2046 is clamped on the fixed seat 2045, and the other end of the torsion spring 2046 is clamped on the fixed rod 2044. A rocker arm 2047 is installed on the rotation axis of the pair of fixed rods 2044, and the rocker arm 2047 movably penetrates the notch 2013 opened on the surface of the plug cover 201, and the pair of rockers 2047 are in an inclined state, and a strip groove 2048 is opened on the surface of the pair of rockers 2047, and a slide bar 2035 is slidably set on the strip groove 2048, and the slide bar 2035 is connected to the synchronous plate 2037, and the synchronous plate 2037 is placed in the gap between the pair of rockers 2047. During the sliding of the slide bar 2035, the slide bar 2035 always slides on the rocker arm 2047 with a strip groove 2048, and the rocker arm 2047 will swing as a whole. The rocker arm 2047 drives the coaxially connected flip plate 204 to start flipping, and then the expansion steel bar 2043 on the flip plate 204 expands, and the torsion spring 2046 is twisted synchronously at this time, which facilitates the later reset through the torsion spring 2046, and the torsion spring 2046 synchronously limits the angle of the initial rocker arm 2047.

[0030] Embodiment 3, based on embodiment 2 and different from this embodiment: Figures 1 to 10As shown, in a specific embodiment, three pairs of jacks 302 are provided on the side wall of the prefabricated wall 101, each pair of jacks 302 is interconnected with the corresponding casting chamber 3021, and the diameter of the jacks 302 is smaller than the diameter of the plug cover 201, and a casting passage 3022 is connected between several pairs of casting chambers 3021, and a casting port 3023 is provided on the top of the prefabricated wall 101, and the casting port 3023 is interconnected with the casting chamber 3021 at the top, and concrete is poured into the casting chamber 3021 through the casting port 3023, and the casting chamber 3021 at each position is filled with concrete through the casting passage 3022.

[0031] like Figures 1 to 10 As shown, further, a blocking block 3033 is installed inside the locking groove 303, and the blocking block 3033 is used to limit the rotation angle of the positioning plate 301. The connecting pipe 3042 movably penetrates the plug cover 201, and a receiving hopper 3043 is installed on the top of the connecting pipe 3042. The outer shell of the receiving hopper 3043 is installed with a positioning rod 3044, and the positioning rod 3044 is connected to the side wall of the plug cover 201. The width of the connecting pipe 3042 is greater than the length of the locking cavity 304.

[0032] The implementation principle of the self-clamping column joint assembled prefabricated underground continuous wall of the present invention is as follows: When assembly is required, the operator needs to plug the two prefabricated walls 101 into each other, so that the staggered plug covers 201 and the matching plug holes 302 on the prefabricated walls 101 are plugged into each other, and then the purpose of connection is achieved by pouring concrete later. Because the above-mentioned plug covers 201 are not in the same straight line, multiple plug covers 201 can form a triangle. The triangle can improve the structural strength of the equipment connection. When the structure is subjected to external forces, such as wind force and earthquake force, the triangular shape can effectively resist deformation. Compared with the structure with the connection points in the same straight line, this non-linear distribution of connection points can make the structure more stable and will not easily twist or collapse. Moreover, when the connection points are not in the same straight line, the natural frequency and vibration mode of the building structure become more complicated. Different connection point distributions will cause the structure to have different stiffness distributions, making it difficult for the structure to fully match the frequency of the seismic wave under the action of the seismic wave, thereby reducing the possibility of resonance and making it safer to use.

[0033] When the socket 302 adapted by the plug cover 201 is plugged in, the positioning plate 301 at the end of the push rod 203 is tightly squeezed in the locking groove 303. As the prefabricated wall 101 with the socket 302 moves, the push rod 203 moves along the positioning sleeve 2031, and the internal block 2032 slides synchronously. The block 2032 squeezes the internal return spring 2036, and the return spring 2036 facilitates the subsequent reset operation. After the block 2032 moves, the push rod 2033 on the block 2032 slides outward, the synchronous bracket 2034 on the push rod 2033 moves, and the synchronous plate 2037 on the synchronous bracket 2034 drives the slide bar 2035 to slide.

[0034] During the sliding process of the slide bar 2035, the slide bar 2035 always slides on the rocker arm 2047 with a strip groove 2048, and the rocker arm 2047 will swing as a whole, and the rocker arm 2047 drives the coaxially connected flip plate 204 to start flipping, and then the expanded steel bars 2043 on the flip plate 204 expand. When the longitudinal steel bars 202 and the bottom of the casting chamber 3021 are fitted, the two prefabricated walls 101 stop moving. At this time, the expanded steel bars 2043 and the longitudinal steel bars 202 fill the entire casting chamber 3021, and a part of the expanded steel bars 2043 and the longitudinal steel bars 202 are located inside the plug cover 201, so that after the plug cover 201 is cast later, the plug cover and the outer layer of concrete can be tightly connected together, which is convenient for improving the structural strength after casting.

[0035] After the above structures are connected, the operator needs to inject concrete into the pouring chamber 3021 through the pouring port 3023 so that the steel bars can be wrapped by the concrete. The pouring passage 3022 is used to connect different pouring chambers 3021, and finally the two prefabricated walls can be connected together.

[0036] The hopper 3043 can ensure that the concrete can fall along the connecting pipe 3042, and finally a part of the concrete can fall on the baffle 3041. However, the concrete unloading position and the rotation center of the block 2032 are not in the same straight line. Finally, the baffle 3041 will rotate, and the baffle 3041 will drive the block 2032 to rotate, and the block 2032 drives the top rod 203 to rotate. At this time, the top rod 203 drives the positioning plate 301 to rotate. At this time, the positioning plate 301 can rotate in the locking groove 303, and finally the positioning plate 301 will contact the blocking block 3033, and then the positioning plate 301 can be tightly connected with the locking groove 303. At this time, the plug cover 201 and the socket 302 can be assembled together, which is convenient for the later pouring and solidification process. The positions of the two will not move, thereby ensuring the stability of the structure after pouring.

Claims

1. A self-clamping column joint assembled prefabricated underground continuous wall, comprising a prefabricated wall body (101) and a steel bar expansion unit (200) and a casting locking unit (300) installed on both sides of the prefabricated wall body (101), characterized in that: The steel bar expansion unit (200) comprises three pairs of plug covers (201), the three pairs of the plug covers (201) are installed on the side walls of the prefabricated wall (101), and the three pairs of the plug covers (201) are not located on the same vertical plane, and a plurality of pairs of longitudinal steel bars (202) are installed on the end surfaces of the three pairs of the plug covers (201), one end of the longitudinal steel bars (202) is placed in the inner cavity of the plug covers (201), and a top rod (203) is movably installed on each pair of the plug covers (201); The casting locking unit (300) comprises a positioning plate (301), the positioning plate (301) is elliptical, and the positioning plate (301) and a locking groove (303) provided on the side wall at the other end of the prefabricated wall (101) are mutually matched, and a shielding plate (3031) is connected to the locking groove (303), an elliptical through hole (3032) is installed on the shielding plate (3031), and the elliptical through hole (3032) is matched with the positioning plate (301), and the plug cover (201) and a casting chamber (3021) provided on the side wall of the prefabricated wall (101) are mutually matched.

2. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 1, characterized in that: One end of the push rod (203) is movably inserted into a positioning sleeve (2031) installed inside the plug cover (201), a stopper (2032) is slidably arranged inside the positioning sleeve (2031), and one end of the stopper (2032) is connected to the push rod (2033), and the other end of the stopper (2032) is rotatably mounted with a push rod (2033), and a synchronous bracket (2034) is installed on the push rod (2033), and a synchronous plate (2037) is installed on the synchronous bracket (2034), and four pairs of flip plates (204) are rotatably installed around each pair of the plug covers (201), and each pair of the flip plates (204) is installed with a plurality of pairs of expansion steel bars (2043), and A rocker arm (2047) is installed at the rotation center of the flip plate (204), and the rocker arm (2047) is slidably connected to the synchronous plate (2037), and the synchronous plate (2037) slides horizontally to drive the rocker arm (2047) and the extended steel bar (2043) to rotate ninety degrees, and one end of the extended steel bar (2043) rotated ninety degrees is placed in the inner cavity of the plug cover (201); a mounting plate (2011) is welded to the side wall of the plug cover (201), and the mounting plate (2011) and the prefabricated wall (101) are integrally cast, and a through hole (2012) is opened on the plug cover (201), and the through hole (2012) is communicated with the internal cavity of the plug cover (201).

3. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 2, characterized in that: A first connecting sleeve (2021) is installed through the end surface of the plug cover (201), a corresponding longitudinal steel bar (202) is movably inserted inside the first connecting sleeve (2021), a first locking bolt (2022) is rotatably installed on the first connecting sleeve (2021), and the end of the first locking bolt (2022) is tightly fitted with the longitudinal steel bar (202), and the length of the longitudinal steel bar (202) located outside the plug cover (201) is less than the length of the top rod (203) located outside the plug cover (201).

4. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 3, characterized in that: The stopper (2032) is tightly fitted to the inner wall of the positioning sleeve (2031), and a return spring (2036) is sleeved on the side wall of the push rod (2033) located in the inner cavity of the positioning sleeve (2031), one end of the return spring (2036) is clamped on the inner wall of the positioning sleeve (2031), and the other end of the return spring (2036) is clamped on the side wall of the stopper (2032).

5. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 2, characterized in that: A second connecting sleeve (2041) is welded on each pair of the flip plates (204), an extended steel bar (2043) is movably inserted and inserted inside the second connecting sleeve (2041), a second locking bolt (2042) is screwed and installed on the surface of the second connecting sleeve (2041), and the bottom of the second locking bolt (2042) is tightly fitted with the extended steel bar (2043).

6. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 5, characterized in that: A pair of fixing rods (2044) are mounted on the surface of each pair of flip plates (204); fixing seats (2045) are rotatably mounted on the ends of the pair of fixing rods (2044); the fixing seats (2045) are welded and arranged on the surface of the plug cover (201); a torsion spring (2046) is mounted on the rotation center of the fixing rods (2044); one end of the torsion spring (2046) is clamped on the fixing seat (2045), and the other end of the torsion spring (2046) is clamped on the fixing rod (2044).

7. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 6, characterized in that: A rocker arm (2047) is installed on the rotating shaft of a pair of fixed rods (2044), and the rocker arm (2047) movably penetrates a notch (2013) opened on the surface of the plug cover (201), the pair of rocker arms (2047) are in an inclined state, and a strip groove (2048) is opened on the surface of the pair of rocker arms (2047), and a slide bar (2035) is slidably arranged on the strip groove (2048), and the slide bar (2035) is connected to a synchronous plate (2037), and the synchronous plate (2037) is placed in the gap between the pair of rocker arms (2047).

8. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 7, characterized in that: The side wall of the prefabricated wall (101) is provided with three pairs of jacks (302), each pair of the jacks (302) is interconnected with a corresponding casting chamber (3021), and the diameter of the jacks (302) is smaller than the diameter of the plug cover (201), and a casting passage (3022) is connected between several pairs of the casting chambers (3021), and a casting port (3023) is provided on the top of the prefabricated wall (101), and the casting port (3023) is interconnected with the casting chamber (3021) on the top.

9. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 8, characterized in that: A blocking block (3033) is installed inside the locking groove (303), and the blocking block (3033) is used to limit the rotation angle of the positioning plate (301).

10. The self-clamping column joint assembled prefabricated underground continuous wall according to claim 9, characterized in that: A connecting pipe (3042) is installed on the positioning sleeve (2031), the centers of the connecting pipe (3042) and the stopper (2032) are not in the same straight line, the connecting pipe (3042) and the locking cavity (304) opened on the inner wall of the stopper (2032) are mutually connected, and a plurality of pairs of baffles (3041) are installed around the inside of the locking cavity (304); the connecting pipe (3042) movably passes through the plug cover (201), a material receiving hopper (3043) is installed on the top of the connecting pipe (3042), a positioning rod (3044) is installed on the outer shell of the material receiving hopper (3043), and the positioning rod (3044) is mutually connected with the side wall of the plug cover (201), and the width of the connecting pipe (3042) is greater than the length of the locking cavity (304).

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