Self-stabilizing locking retaining wall formwork structure and building method thereof

Abstract

The invention discloses a self-stabilizing locking retaining wall formwork structure and a building method thereof, and relates to the technical field of building engineering construction. The self-stabilizing locking retaining wall formwork structure comprises a formwork assembly formed by sequentially connecting a plurality of formwork single bodies and further comprises a plurality of stand columns arranged at intervals in the length direction of the formwork assembly, the upper portions of the stand columns are detachably connected with the formwork assembly, and retaining wall supporting seats are fixedly arranged on the lower portions of the stand columns; a retaining wall drain hole fastening device is arranged in the middle of the stand column; the retaining wall weep hole fastening device is hinged to the stand column through a connecting part and a pin shaft, a shaft center is fixedly connected to the connecting part, the shaft center is sleeved with a fastening kit, and the outer diameter of the fastening kit is changed by sliding in the axial direction of the shaft center. Self-stabilization of the formwork assembly is achieved, opposite-pulling steel bars adopted in existing construction do not need to be arranged, and therefore loss of the formwork assembly caused by the opposite-pulling steel bars is avoided, the formwork mechanism can be repeatedly used, and the turnover utilization rate of the formwork structure is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of building engineering construction, and in particular to a self-stabilizing and locking retaining wall formwork structure and a method for building a self-stabilizing and locking retaining wall formwork structure. Background Art

[0002] Retaining walls are widely used in building construction. A retaining wall is a key structure for ensuring the stability of soil, preventing the risk of collapse, and maintaining the site boundary. The common construction method of a retaining wall is to use formwork for formwork support, and to stabilize the formwork by means of tensioning with steel bars, and to set drain holes by embedding PVC pipes. In the actual construction process, due to problems such as the accuracy of the layout of the tensioning steel bars, the formwork cannot withstand the lateral pressure during concrete pouring, which may lead to phenomena such as offset and even formwork explosion. This not only seriously affects the appearance quality of the retaining wall, but also greatly reduces the structural stability and bearing capacity of the retaining wall, bringing great hidden dangers to the safety of engineering construction; in addition, in some construction work, the tensioning device is directly welded to the formwork, which will cause the surface of the formwork to become uneven, affecting the normal use of the formwork in the future. After form removal, obvious steel bar end faces will be left on the concrete surface, which not only destroys the integrity of the concrete surface and affects the aesthetics, but may also cause steel bar corrosion due to the non-compaction of the concrete at the steel bar cross-section, thereby reducing the durability of the retaining wall. More importantly, in the above construction of setting drain holes by embedding PVC pipes, the PVC pipes are prone to displacement, blockage and other problems during construction, resulting in the drain holes being unable to function properly, causing water accumulation behind the wall and increasing soil pressure, which has an adverse impact on the retaining wall.

[0003] For example, the Chinese utility model patent document with the authorization announcement number CN221608928U discloses a retaining wall drain hole fixing formwork device, and its technical solution includes a plurality of steel sleeves and two oppositely arranged formworks. The steel sleeves are all used for installing drain pipes and correspond to the drain pipes one by one. The steel sleeves pass through the drain pipes and through the two formworks, and the outer wall of the steel sleeve is in contact and fit with the inner wall of the drain pipe; it also includes a plurality of fixing parts, which correspond to the steel sleeves one by one. The fixing parts fix the steel sleeves on the two formworks and clamp the drain pipes between the two formworks. The technical solution of this patent achieves the effect of preventing the horizontal displacement deviation of the drain pipes through the design of clamping the drain pipes between the two formworks by the formwork, the steel sleeves and the fixing parts; and through the design of sleeving the drain pipes on the steel sleeves and the inner wall of the drain pipes being in contact with the outer wall of the steel sleeves, the effect of preventing the vertical displacement deviation of the drain pipes is achieved. However, this patent still fixes the two formworks on the drain pipes by a similar tensioning method using two back ribs, which cannot reduce the impact on the formwork, and the formwork still has relatively large losses. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a self-stabilizing and locking retaining wall formwork structure that can effectively improve the turnover and utilization rate of formwork.

[0005] The technical solution adopted by the present invention to solve the above technical problem is: a self-stabilizing and locking retaining wall formwork structure, including a formwork component composed of a plurality of formwork monomers connected in sequence, and further including a plurality of columns arranged at intervals along the length direction of the formwork component. The upper part of the column is detachably connected to the formwork component, the lower part of the column is fixedly provided with a retaining wall support seat, and a retaining wall drain hole fastening device is arranged in the middle of the column; the retaining wall drain hole fastening device is hingedly connected to the column through a connecting part and a pin shaft. A shaft center is fixedly connected to the connecting part, and a fastening kit is sleeved on the shaft center. The fastening kit changes its outer diameter by sliding along the axial direction of the shaft center.

[0006] As an improvement to the above solution: the fastening kit is composed of a kit joint and at least three friction plates; the friction plates are arc-shaped plates, and the friction plates are arranged in a ring around the outside of the shaft center. Grooves parallel to the axial direction of the fastening kit are provided on the inner side surface of the friction plates facing the shaft center, and both ends of the grooves are through; the kit joint is sleeved on the shaft center, and one end of the friction plate is movably connected to the kit joint; convex ribs corresponding to the grooves one by one and slidably matched with the grooves are arranged on the shaft center. The convex ribs extend along the axial direction of the shaft center, and the height of the convex ribs gradually increases from the end close to the connecting part to the end far from the connecting part.

[0007] As an improvement to the above solution: both the number of the friction plates and the convex ribs is four, and the four convex ribs are evenly distributed in a cross shape on the shaft center.

[0008] As an improvement to the above solution: limit blocks corresponding to the friction plates one by one are fixedly arranged on the kit joint; the limit blocks are arranged along the radial direction of the kit joint; a limit notch matched with the limit blocks is arranged at one end of the friction plate close to the kit joint.

[0009] As an improvement to the above solution: the upper part of the column is fixedly connected to the formwork component through a plurality of fixed supports; a plurality of vertical rib beams and transverse distribution beams are staggered on the formwork component; the vertical rib beams are fixedly connected to the formwork component, the transverse distribution beams are fixedly connected to the vertical rib beams, and the fixed supports are fixedly connected to the transverse distribution beams.

[0010] As an improvement to the above solution: one end of the fixed support is detachably connected to the column; the other end of the fixed support is connected with a fixed clamping groove through an adjustable bolt, and the fixed clamping groove is snap-connected to the transverse distribution beam.

[0011] As an improvement to the above solution: It further includes a reaction force support seat connected to the column, and the reaction force support seat is arranged at a position on the column close to the bottom of the formwork assembly; one end of the reaction force support seat is detachably connected to the column, and the other end of the reaction force support seat is provided with a threaded adjustment section, and the length of the reaction force support seat can be adjusted through the threaded adjustment section.

[0012] As an improvement to the above solution: The column is composed of two channel steels fixedly connected; the backs of the two channel steels face each other, the notch directions are opposite, the two channel steels are arranged with a gap, and a plurality of cushion blocks fixedly connected to the backs of the channel steels are arranged at intervals between the two channel steels.

[0013] The present invention also discloses a construction method of a self-stabilizing and locking retaining wall formwork structure. Using the self-stabilizing and locking retaining wall formwork structure described above, it is carried out according to the following steps: Step 1: Insert the axis of the retaining wall drainage hole fastening device and the fastening kit into the corresponding drainage hole on the retaining wall. After temporarily fixing the retaining wall drainage hole fastening device, pull out the axis outward so that the fastening kit slides relative to the axis, and the outer diameter of the fastening kit expands and is anchored in the drainage hole; Step 2: Connect the column to the retaining wall drainage hole fastening device, and then install a reaction force support seat on the column. The reaction force support seat abuts against the retaining wall and adjusts the length of the reaction force support seat so that the retaining wall support seat at the lower part of the column tightly abuts against the retaining wall; Step 3: Connect the formwork assembly to the column, adjust the position of the formwork assembly in the horizontal and vertical directions and the inclination angle of the formwork assembly, and fix the formwork assembly after adjustment.

[0014] The beneficial effects of the present invention are as follows: The present invention builds the formwork assembly on the retaining wall by setting columns, and the columns are connected and fixed to the drainage holes on the retaining wall by using the retaining wall drainage hole fastening device, thereby realizing the self-stability of the formwork assembly. There is no need to arrange the tension bars used in the existing construction, thus avoiding the damage to the formwork assembly caused by the tension bars, enabling the formwork mechanism to be reused, and improving the turnover rate of the formwork structure; the present invention supports the formwork structure through the existing drainage hole structure on the retaining wall in cooperation with the retaining wall drainage hole fastening device, effectively reducing the number of embedded parts used, and improving the construction efficiency while reducing the construction cost; the present invention connects the fixed support member installed on the column to the formwork assembly, and the fixed support member can adjust the fixed position and inclination angle of the formwork assembly, thereby effectively ensuring the accuracy of the formwork position and improving the appearance quality of the retaining wall. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the self-stabilizing and locking retaining wall formwork structure installed on the retaining wall; Figure 2 It is a schematic diagram of the structure of the self-stabilizing and locking retaining wall formwork structure; Figure 3 Schematic diagram of the cooperation structure between the upright column and the formwork assembly; Figure 4 Schematic diagram of the fastening device for the drainage holes of the retaining wall when the fastening kit is not opened; Figure 5 Schematic diagram of the fastening device for the drainage holes of the retaining wall after the fastening kit is opened.

[0016] In the figure, the markings are: 100 - formwork assembly, 110 - vertical rib beam, 120 - transverse distribution beam, 200 - upright column, 210 - channel steel, 220 - cushion block, 300 - retaining wall support seat, 400 - fastening device for the drainage holes of the retaining wall, 410 - connecting part, 420 - pin shaft, 430 - axis center, 440 - fastening kit, 441 - kit joint, 442 - friction plate, 443 - groove, 444 - rib, 445 - limiting block, 446 - limiting notch, 500 - fixed support member, 510 - adjustable bolt, 520 - fixed clamping groove, 600 - reaction support seat, 700 - retaining wall, 710 - drainage hole. Specific embodiments

[0017] For the convenience of understanding the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0018] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "inside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0019] As Figure 1 and Figure 2 shown, the self-stabilizing and locking retaining wall formwork structure disclosed in the present invention uses the upright column 200 to form the formwork for the formwork assembly 100; the present invention anchors the upright column 200 on the retaining wall 700 through the fastening device 400 for the drainage holes of the retaining wall on the upright column 200 in cooperation with the existing drainage holes 710 on the retaining wall 700. At the same time, the present invention uses the retaining wall support seat 300 on the upright column 200 to tightly abut against the retaining wall 700 to form a bottom support, and realizes the self-stability of the entire formwork structure on the retaining wall 700 through the above structure of the upright column 200, and there is no need to arrange the tension bars in the traditional scheme.

[0020] Specifically, as Figures 1 to 3As shown, the formwork component 100 is composed of multiple formwork monomers connected in sequence. The formwork monomers extend and are arranged in sequence along the length direction of the retaining wall 700 and are connected in sequence. In order to improve the overall strength of the formwork component 100, and at the same time realize the connection between the formwork monomers and the connection between the formwork component 100 and the column 200, the present invention is provided with a plurality of vertical rib beams 110 and transverse distribution beams 120 on the formwork component 100; the vertical rib beams 110 extend and are fixed along the height direction of the formwork component 100, and a plurality of vertical rib beams 110 are arranged at intervals along the length direction of the formwork component 100; the transverse distribution beams 120 extend and are fixed along the length direction of the formwork component 100, and a plurality of transverse distribution beams 120 are arranged at intervals along the height direction of the formwork component 100. The present invention reinforces a single formwork monomer in the formwork component 100 by providing the vertical rib beams 110, and sequentially connects and fixes the formwork monomers by providing the transverse distribution beams 120, and also connects the entire formwork component 100 with the column 200 through the transverse distribution beams 120.

[0021] In the present invention, the column 200 is fixedly connected to the formwork component 100 through a fixed support member 500. Specifically, as Figure 2 and Figure 3 shown, the upper part of each column 200 is provided with fixed support members 500 having the same number as the number of transverse distribution beams 120. The fixed support members 500 are arranged at intervals along the height direction of the column 200 at the upper part of the column 200 and correspond to the transverse distribution beams 120 one by one. One end of the fixed support member 500 is detachably connected to the column 200, and the other end of the fixed support member 500 is connected with a fixed clamping groove 520 through an adjustable bolt 510. The shape of the fixed clamping groove 520 is adapted to the shape of the transverse distribution beam 120 so that the fixed clamping groove 520 can be snap-fitted with the transverse distribution beam 120. By adjusting the fixed position of the fixed support member 500 on the column 200, the vertical movement of the formwork component 100 can be realized; the fixed clamping groove 520 is snap-connected to the transverse distribution beam 120 and the fixed clamping groove 520 can be slid along the transverse distribution beam 120 to adjust the actual connection position, so as to realize the lateral movement of the formwork component 100; the distance between the fixed clamping groove 520 and the column 200 can also be adjusted by adjusting the telescopic length of the adjustable bolt 510, so as to adjust the connection distance between the column 200 and the transverse distribution beam 120. By controlling the distances between multiple transverse distribution beams 120 and the column 200, the inclination angle of the formwork component 100 can be adjusted. Through the above three adjustment methods, the present invention can realize multi-directional adjustment of the formwork component 100, thereby effectively ensuring the accuracy of the formwork support position.

[0022] In the present invention, the column 200 is anchored to the retaining wall 700 through a retaining wall drain hole fastening device 400. As Figure 1 andFigure 2 As shown, the retaining wall drain hole fastening device 400 is installed in the middle of the column 200. The retaining wall drain hole fastening device 400 cooperates with the original drain hole 710 on the retaining wall 700, and the column 200 is fixed on the retaining wall 700 by anchoring the retaining wall drain hole fastening device 400 in the drain hole 710. The retaining wall drain hole fastening device 400 is as Figure 4 and Figure 5 shown, and includes a connecting portion 410, a pin shaft 420, an axis 430, and a fastening kit 440. One end of the connecting portion 410 is rotatably connected to the column 200 through the pin shaft 420, and the other end of the connecting portion 410 is fixedly connected to the axis 430. The axis 430 is a cylindrical strip structure, the fastening kit 440 is sleeved on the axis 430, the fastening kit 440 can slide relative to the axis 430, and the fastening kit 440 can change its outer diameter by sliding along the axial direction of the axis 430; after inserting the retaining wall drain hole fastening device 400 fixed on the column 200 into the corresponding drain hole 710 on the retaining wall 700, by pulling out the axis 430 outward, relative movement occurs between the axis 430 and the fastening kit 440, and the outer diameter of the fastening kit 440 increases and is anchored in the drain hole 710, so as to realize the fixation of the retaining wall drain hole fastening device 400 in the drain hole 710.

[0023] Specifically, as Figure 4 and Figure 5As shown, the fastening kit 440 is composed of a kit joint 441 and a plurality of friction plates 442. The friction plates 442 are arc-shaped half pieces arranged in an annular pattern outside the axis 430, and the plurality of friction plates 442 form a cylindrical fastening kit 440; on the inner side surface of the friction plate 442 facing the axis 430, there is a groove 443, and the groove 443 is arranged along the length direction of the friction plate 442, that is, parallel to the axial direction of the fastening kit 440, and both ends of the groove 443 are through, that is, both ends of the groove 443 are flush with both ends of the friction plate 442 respectively. On the axis 430, there are convex ribs 444 corresponding to the grooves 443 one by one, and the convex ribs 444 are engaged and slidably mated with the corresponding grooves 443, and the height of the convex ribs 444 gradually increases from the end close to the connecting part 410 to the end far from the connecting part 410. Then, when the axis 430 and the kit joint 441 slide relatively, the convex ribs 444 slide in the corresponding grooves 443, and due to the change in the height of the convex ribs 444, the outer diameter of the fastening kit 440 changes; the farther the fastening kit 440 slides away from the connecting part 410, the greater the distance between the friction plates 442, and the outer diameter of the fastening kit 440 composed of the friction plates 442 also expands correspondingly. The kit joint 441 is a circular ring structure sleeved on the axis 430, and one end of the friction plate 442 is movably connected to the kit joint 441; specifically, on the kit joint 441, there are limit blocks 445 corresponding to the friction plates 442 one by one, the limit blocks 445 are arranged along the radial direction of the kit joint 441, and at one end of the friction plate 442 close to the kit joint 441, there is a limit notch 446 that cooperates with the limit block 445; through the cooperation of the limit block 445 and the limit notch 446, on the one hand, the movable connection between the friction plate 442 and the kit joint 441 can be realized, and on the other hand, the movement of the friction plate 442 can be limited, so that the friction plate 442 cannot rotate circumferentially and can only expand or contract in the radial direction of the fastening kit 440.

[0024] The number of the friction plates 442 can be set according to the construction situation. In the present invention, the number of the friction plates 442 is set to four. Correspondingly, the number of the convex ribs 444 on the axis 430 is also set to four, and the four convex ribs 444 are arranged in a cross-shaped uniform distribution on the axis 430.

[0025] As Figure 2 and Figure 3As shown in the figure, a reaction force support base 600 is further provided on the column 200 in the present invention. The reaction force support base 600 is provided at a position on the column 200 close to the bottom of the formwork assembly 100, that is, below the formwork assembly 100. One end of the reaction force support base 600 is detachably connected to the column 200, and the other end of the reaction force support base 600 is provided with a threaded adjustment section; the threaded adjustment section can be composed of a threaded section and an end piece with a threaded hole, and the overall length of the reaction force support base 600 can be adjusted through the threaded adjustment section. The end piece of the threaded adjustment section of the reaction force support base 600 abuts against the retaining wall 700, and the support distance of the reaction force support base 600 is adjusted by rotating the end piece to move the end piece on the threaded section, that is, the distance between the connection point of the reaction force support base 600 and the column 200 and the retaining wall 700 is adjusted. Thus, through the cooperation of the retaining wall support base 300, the retaining wall drain hole fastening device 400, and the reaction force support base 600, the self-stability of the column 200 on the retaining wall 700 is realized.

[0026] The column 200 in the present invention can adopt an integral structure or an assembled split structure. For the convenience of installing and adjusting the retaining wall drain hole fastening device 400, the fixed support member 500, and the reaction force support base 600 installed on the column 200, as Figure 3 shown, the column 200 in the present invention is composed of two channel steels 210 and a plurality of cushion blocks 220; when fixed, the backs of the two channel steels 210 face each other and the notch directions are opposite, and a spacing adapted to the size of the cushion blocks 220 is left between the two channel steels 210. The plurality of cushion blocks 220 are arranged at equal intervals between the two channel steels 210 and fixedly connected to the channel steels 210 by welding. Using the channel steels 210 and the cushion blocks 220 to form the column 200, on the one hand, it is convenient to obtain materials, can reduce the overall weight and production cost of the column 200, and on the other hand, it can ensure the strength of the column 200, facilitate the installation of other components at the same time, and facilitate the adjustment of the fixed positions of the components installed on the column 200. When installing the retaining wall drain hole fastening device 400, the connecting part 410 of the retaining wall drain hole fastening device 400 is connected to the pin shaft 420 passing through the column 200 from both sides of the column 200 through the two side plates; when installing the fixed support member 500 and the reaction force support base 600, both the fixed support member 500 and the reaction force support base 600 are fixed to the column 200 by matching with the retaining block and the nut through the threaded section passing through the gap between the two channel steels 210 in a locked manner.

[0027] The present invention also discloses a construction method for the above self-stabilizing and locking retaining wall formwork structure. Specifically, the construction and subsequent pouring construction are carried out according to the following steps: Step 1: Install the retaining wall drain hole fastening device 400 Insert the axis 430 of the retaining wall drain hole fastening device 400 and the fastening kit 440 into the corresponding drain hole 710 on the retaining wall 700. After temporarily fixing the retaining wall drain hole fastening device 400, pull out the axis 430 outward so that the friction plates 442 of the fastening kit 440 slide along the ribs 444 on the axis 430 towards the outside of the drain hole 710. The distance between the friction plates 442 becomes larger, causing the outer diameter of the fastening kit 440 to expand until the fastening kit 440 comes into contact and anchors with the drain hole 710, and the retaining wall drain hole fastening device 400 is completely fixed in the drain hole 710.

[0028] Step 2: Install the column 200 Hinge the retaining wall drain hole fastening device 400 to the column 200 through the pin shaft 420 and the connecting part 410. Then install the reaction support seat 600 on the column 200, and adjust the overall length of the reaction support seat 600 through the threaded adjustment section of the reaction support seat 600 so that the reaction support seat 600 abuts against the retaining wall 700, and make the retaining wall support seat 300 at the lower part of the column 200 press tightly against the retaining wall 700; according to the positions of the remaining drain holes 710 on the retaining wall 700, install the remaining retaining wall drain hole fastening devices 400 and columns 200 in sequence.

[0029] Step 3: Install the formwork assembly 100 Connect the formwork assembly 100 to the column 200 through the fixed support member 500; adjust the lateral position of the formwork assembly 100 by adjusting the buckle position of the fixed support member 500 on the transverse distribution beam 120; adjust the longitudinal position of the formwork assembly 100 by adjusting the fixed position of the fixed support member 500 on the column 200; adjust the inclination angle of the formwork assembly 100 through the adjustable bolt 510; through the above three adjustment methods, realize the multi-directional adjustment of the formwork assembly 100 until the formwork assembly 100 is completely adjusted in place and then fix the formwork assembly 100.

[0030] Step 4: Complete the concrete pouring construction; after the concrete strength reaches the requirement, remove the formwork structure and repeat the above steps.

Claims

1. Self-stabilizing and locking retaining wall formwork structure, comprising a formwork component (100) composed of a plurality of formwork monomers connected in sequence, characterized in that: It further includes a plurality of columns (200) arranged at intervals along the length direction of the formwork assembly (100). The upper part of the column (200) is detachably connected to the formwork assembly (100), a retaining wall support base (300) is fixedly arranged at the lower part of the column (200), and a retaining wall drain hole fastening device (400) is arranged in the middle of the column (200); the retaining wall drain hole fastening device (400) is hingedly connected to the column (200) through a connecting part (410) and a pin shaft (420). A shaft center (430) is fixedly connected to the connecting part (410), a fastening kit (440) is sleeved on the shaft center (430), and the outer diameter of the fastening kit (440) is changed by sliding axially along the shaft center (430).

2. The self-stabilizing and locking retaining wall formwork structure according to claim 1, characterized in that: The fastening kit (440) is composed of a kit joint (441) and at least three friction plates (442); the friction plates (442) are arc-shaped plates, the friction plates (442) are arranged in a ring shape outside the shaft center (430), and grooves (443) arranged parallel to the axial direction of the fastening kit (440) are arranged on the inner side surface of the friction plates (442) facing the shaft center (430), and both ends of the grooves (443) are through; the kit joint (441) is sleeved on the shaft center (430), and one end of the friction plate (442) is movably connected to the kit joint (441); convex ribs (444) corresponding to the grooves (443) one by one and slidably matched with the grooves (443) are arranged on the shaft center (430), the convex ribs (444) extend along the axial direction of the shaft center (430), and the height of the convex ribs (444) gradually increases from the end close to the connecting part (410) to the end far from the connecting part (410).

3. The self-stabilizing and locking retaining wall formwork structure according to claim 2, characterized in that: The number of the friction plates (442) and the convex ribs (444) is four, and the four convex ribs (444) are evenly arranged in a cross shape on the shaft center (430).

4. The self-stabilizing and locking retaining wall formwork structure according to claim 2, wherein: Limit blocks (445) corresponding to the friction plates (442) one by one are fixedly arranged on the kit joint (441), and the limit blocks (445) are arranged along the radial direction of the kit joint (441); a limit notch (446) matched with the limit blocks (445) is arranged at one end of the friction plate (442) close to the kit joint (441).

5. The self-stabilizing and locking retaining wall formwork structure according to claim 2, characterized in that: The upper part of the column (200) is fixedly connected to the formwork assembly (100) through a plurality of fixed supports (500); a plurality of vertical rib beams (110) and transverse distribution beams (120) are arranged alternately on the formwork assembly (100); the vertical rib beams (110) are fixedly connected to the formwork assembly (100), the transverse distribution beams (120) are fixedly connected to the vertical rib beams (110), and the fixed supports (500) are fixedly connected to the transverse distribution beams (120).

6. The self-stabilizing and locking retaining wall formwork structure according to claim 5, characterized in that: One end of the fixed support (500) is detachably connected to the column (200), the other end of the fixed support (500) is connected with a fixed clamping groove (520) through an adjustable bolt (510), and the fixed clamping groove (520) is snap-connected to the transverse distribution beam (120).

7. The self-stabilizing and locking retaining wall formwork structure according to any one of claims 2 to 6, characterized in that: It further includes a reaction force support base (600) connected to the column (200), and the reaction force support base (600) is arranged at a position on the column (200) close to the bottom of the formwork assembly (100); one end of the reaction force support base (600) is detachably connected to the column (200), and the other end of the reaction force support base (600) is provided with a threaded adjustment section, and the length of the reaction force support base (600) can be adjusted through the threaded adjustment section.

8. The self-stabilizing and locking retaining wall formwork structure according to claim 7, characterized in that: The column (200) is fixedly connected and composed of two channel steels (210); the backs of the two channel steels (210) face each other, the notch directions are opposite, the two channel steels (210) are arranged with a gap, and a plurality of cushion blocks (220) fixedly connected to the backs of the channel steels (210) are arranged at intervals between the two channel steels (210).

9. The construction method of the self-stabilizing and locking retaining wall formwork structure is characterized in that: Adopt the self-stabilizing and locking retaining wall formwork structure as described in claim 8 above, and proceed according to the following steps: Step 1: Insert the axis (430) of the retaining wall drain hole fastening device (400) and the fastening kit (440) into the corresponding drain hole (710) on the retaining wall (700). After temporarily fixing the retaining wall drain hole fastening device (400), pull out the axis (430) outward to make the fastening kit (440) slide relative to the axis (430), and the outer diameter of the fastening kit (440) expands and is anchored in the drain hole (710); Step 2: Connect the column (200) to the retaining wall drain hole fastening device (400), then install the reaction force support base (600) on the column (200), the reaction force support base (600) abuts against the retaining wall (700) and adjust the length of the reaction force support base (600) to make the retaining wall support base (300) at the lower part of the column (200) press tightly against the retaining wall (700); Step 3: Connect the formwork assembly (100) to the column (200), adjust the position of the formwork assembly (100) in the horizontal and vertical directions and the inclination angle of the formwork assembly (100), and fix the formwork assembly (100) after adjustment in place.

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