A joint structure for a diaphragm wall and its construction method
By using a combination of lock columns, corrugated plates, and electrically controlled jacking cylinders at the joints of underground diaphragm walls, the problem of loose joints was solved, the connection strength and stability of the joints were improved, and water leakage was prevented.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SINOHYDRO FOUND ENG
- Filing Date
- 2023-11-29
- Publication Date
- 2026-06-30
AI Technical Summary
There is a risk of water leakage at the joints of the existing diaphragm wall. The locking pipe and the end of the trench section are not easy to tighten, resulting in loose joints.
It adopts a lock-joint column structure with grooves and V-shaped extensions on both sides. It is equipped with corrugated plates and electrically controlled top cylinders. The extension and retraction of the electrically controlled top cylinders controls the corrugated plates to be pressed tightly in the grooves, forming a V-shaped surface to increase the contact area with concrete and improve the connection strength.
It enhances the connection strength of the diaphragm wall joints, solves the potential for water leakage at the joints, and achieves the stability and tightness of the joints.
Smart Images
Figure CN117385861B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of building construction technology, and in particular relates to a joint structure for underground continuous walls and its construction method. Background Technology
[0002] Diaphragm walls are composed of many wall segments. To maintain continuous construction between segments, existing technology uses a lock-joint technique for joints. This involves inserting a steel pipe with the same diameter and width as the trench segment into the end of the segment before pouring concrete. After the concrete has initially set, the steel pipe is slowly pulled out, creating a semi-recessed tenon structure at the end. Then, the protruding end of the reinforcement cage of the next section is lowered for connection, and finally, concrete is poured to connect the two wall segments into a single unit.
[0003] The common practice is to fill the prefabricated joints such as the lock pipe with stone chips or sandbags to fix the position of the lock pipe after inserting it. However, it is not easy to tighten the lock pipe and the end of the groove section, resulting in an unsealed joint and a risk of water leakage.
[0004] Therefore, it is necessary to design a joint structure for underground continuous walls and its construction method to solve the above problems. Summary of the Invention
[0005] The purpose of this invention is to provide a joint structure for diaphragm walls and its construction method to solve the above-mentioned problems and improve the safety strength between joints in diaphragm walls.
[0006] To achieve the above objectives, the present invention provides the following solution: a joint structure for a diaphragm wall, comprising a lock column, wherein grooves are respectively provided on opposite sides of the outer side wall of the lock column, and V-shaped expansion portions are symmetrically arranged on both sides of the lock column, wherein the V-shaped expansion portions correspond one-to-one with and are adapted to the grooves, and an expansion portion is fixedly connected to the side wall of the groove, wherein the expansion portion is adapted to the V-shaped expansion portion;
[0007] The V-shaped extension includes a side post, which is parallel to the locking post. Two rotating shafts are rotatably connected to the side post near the locking post. The two rotating shafts are parallel to each other and spaced apart. A corrugated plate is fixedly connected to one end of the outer wall of the rotating shaft along its axial direction. The other end of the corrugated plate is adapted to the groove. The corrugated plate is adapted to the extension.
[0008] Preferably, the expansion section includes a plurality of electrically controlled top cylinders, which are arranged at equal intervals. The fixed end of each electrically controlled top cylinder is fixedly connected to the side wall of the groove. The telescopic ends of any two adjacent electrically controlled top cylinders are arranged in opposite directions, and the telescopic ends of each electrically controlled top cylinder are adapted to the corrugated plate.
[0009] Preferably, the side post has two rotating grooves on the side near the locking post, and the rotating shaft corresponds to each of the rotating grooves and is rotatably disposed within the rotating grooves.
[0010] Preferably, connecting lugs are fixedly connected to both ends of the rotating shaft, and connecting holes are respectively provided on the top and bottom walls of the rotating groove, with the connecting lugs rotatably connected to the connecting holes.
[0011] Preferably, a pointed cone is fixedly connected to the bottom end of the side post.
[0012] Preferably, the locking post has a weight-reducing hole coaxially formed inside.
[0013] A construction method for a joint structure of a diaphragm wall includes the following steps:
[0014] S1. Place a lock post vertically between the two sections of diaphragm wall;
[0015] S2. Place a side column between the lock column and the end of the underground continuous wall, and then open the free ends of the two corrugated plates to an angle that matches the groove.
[0016] S3. Control the extension end of the electronically controlled top cylinder to press the free end of the corrugated plate against the inner wall of the groove;
[0017] S4. Begin pouring the underground continuous wall on both sides of the lock column;
[0018] S5. After the underground continuous wall has solidified and formed, the telescopic end of the electrically controlled top cylinder is shortened to release the clamping state on the corrugated plate.
[0019] S6. Bring the free ends of the two corrugated plates together so that the outer surface of the free ends of the corrugated plates separates from the solidified diaphragm wall.
[0020] S7. Remove the lock column, edge column, and corrugated plate from between the two solidified sections of the diaphragm wall.
[0021] Compared with the prior art, the present invention has the following advantages and technical effects:
[0022] This invention uses a locking post as the main body of the entire joint structure. Side posts and corrugated plates are detachably installed on both sides of the locking post. The detachable connection method facilitates the storage, transfer and transportation of the joint structure. In use, the locking post is first fixed between two sections of underground continuous wall. Then, the side posts and corrugated plates are installed on both sides respectively. After installation, an integral joint structure is formed. The corrugated plates can form a corrugated V-shaped surface at the end during the pouring of the connecting wall. In this way, when the concrete at the joint position is poured after the continuous wall has solidified, the contact area between the successively solidified concrete is increased, thereby improving the connection strength of the joint. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0025] Figure 2 This is a partial structural diagram of the present invention;
[0026] Figure 3 This is a schematic diagram of the corrugated plate and rotating shaft of the present invention;
[0027] Figure 4 This is a schematic diagram of the side pillar of the present invention.
[0028] Among them, 1. Locking post; 2. Groove; 3. Weight reduction hole; 4. Side post; 5. Corrugated plate; 6. Rotating shaft; 7. Pointed cone; 8. Electric control top cylinder; 9. Connecting lug; 10. Rotating groove; 11. Connecting hole. Detailed Implementation
[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0031] Reference Figures 1-4 The present invention provides a joint structure for a diaphragm wall, including a lock column 1, grooves 2 are respectively provided on opposite sides of the outer side wall of the lock column 1, and V-shaped expansion portions are symmetrically arranged on both sides of the lock column 1. The V-shaped expansion portions correspond to and are adapted to the grooves 2 one by one. An expansion portion is fixedly connected to the side wall of the groove 2, and the expansion portion is adapted to the V-shaped expansion portion.
[0032] The V-shaped expansion section includes a side post 4, which is parallel to the locking post 1. Two rotating shafts 6 are rotatably connected to the side of the side post 4 near the locking post 1. The two rotating shafts 6 are parallel to each other and spaced apart. One end of a corrugated plate 5 is fixedly connected to the outer wall of the rotating shaft 6 along its axial direction. The other end of the corrugated plate 5 is adapted to the groove 2. The corrugated plate 5 is adapted to the expansion section.
[0033] Further optimization of the scheme: the expansion section includes several electrically controlled top cylinders 8, which are arranged at equal intervals. The fixed end of the electrically controlled top cylinder 8 is fixedly connected to the side wall of the groove 2. The telescopic ends of any two adjacent electrically controlled top cylinders 8 are arranged in opposite directions. The telescopic ends of the electrically controlled top cylinder 8 are adapted to the corrugated plate 5.
[0034] To further optimize the design, two rotating grooves 10 are provided on the side of the side post 4 near the locking post 1. The rotating shaft 6 corresponds to the rotating groove 10 and is rotatably set in the rotating groove 10.
[0035] In a further optimized design, connecting lugs 9 are fixedly connected to both ends of the rotating shaft 6, and connecting holes 11 are respectively opened on the top and bottom walls of the rotating groove 10. The connecting lugs 9 are rotatably connected to the connecting holes 11.
[0036] The design was further optimized by fixing a pointed cone 7 to the bottom of the side post 4.
[0037] The pointed cone 7 can be used to insert and fix the side column 4 into the ground, ensuring the stability of the side column 4 when pouring concrete.
[0038] The design was further optimized by providing a weight-reducing hole 3 coaxially inside the locking post 1.
[0039] While ensuring the overall strength of the locking pin 1, the weight-reducing hole 3 can reduce the overall weight of the locking pin 1.
[0040] A construction method for a joint structure of a diaphragm wall includes the following steps:
[0041] S1. Place a lock post 1 vertically between the two sections of diaphragm wall;
[0042] Place a lock post 1 in the middle of the two sections of diaphragm wall that need to be poured, and align the grooves 2 on both sides of the lock post 1 with the direction of the diaphragm wall.
[0043] S2. Place the side column 4 between the lock column 1 and the end of the underground continuous wall, and then open the free ends of the two corrugated plates 5 to an angle that matches the groove 2.
[0044] Place the side posts 4 at appropriate positions on both sides of the locking post 1, and insert and fix the side posts 4 into the ground using the pointed cone 7. Then, spread the free ends of the two corrugated plates 5 to an angle that matches the width of the groove 2, so that the free ends of the corrugated plates 5 extend into the groove 2.
[0045] S3. Control the extension end of the electric top cylinder 8 to press the free end of the corrugated plate 5 against the inner wall of the groove 2.
[0046] After the electrically controlled top cylinder 8 presses the free end of the corrugated plate 5 against the inner wall of the groove 2, the installation of the entire joint structure is completed.
[0047] S4. Begin pouring the underground continuous wall on both sides of the lock column 1;
[0048] Concrete is poured at the location where a diaphragm wall is needed, and the concrete is allowed to solidify.
[0049] S5. After the underground continuous wall has solidified and formed, the telescopic end of the electrically controlled top cylinder 8 is shortened to release the clamping state on the corrugated plate 5.
[0050] After the concrete has solidified, the telescopic end of the electrically controlled top cylinder 8 retracts, and the corrugated plate 5 is no longer tightened.
[0051] S6. Bring the free ends of the two corrugated plates 5 together so that the outer surface of the free end of the corrugated plate 5 is separated from the solidified underground continuous wall.
[0052] The free ends of the two corrugated plates 5 are brought closer together, and after they are brought closer together, the outer wall of the corrugated plate 5 separates from the end of the solidified continuous wall.
[0053] S7. Remove the lock column 1, the side column 4, and the corrugated plate 5 from between the two solidified sections of the underground continuous wall.
[0054] After the corrugated plate 5 separates from the end of the solidified continuous wall, the locking column 1 is first lifted out of the ground, and then the side columns 4 and the corrugated plate 5 on both sides are slowly lifted out of the ground.
[0055] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0056] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A joint structure for a diaphragm wall, characterized in that, Includes a locking post (1), with grooves (2) respectively opened on opposite sides of the outer side wall of the locking post (1), and V-shaped expansion portions symmetrically arranged on both sides of the locking post (1). The V-shaped expansion portions correspond one-to-one with and are adapted to the grooves (2). An expansion portion is fixedly connected to the side wall of the groove (2), and the expansion portion is adapted to the V-shaped expansion portion. The V-shaped expansion section includes a side post (4), which is parallel to the locking post (1). Two rotating shafts (6) are rotatably connected to the side of the side post (4) near the locking post (1). The two rotating shafts (6) are parallel to each other and spaced apart. One end of a corrugated plate (5) is fixedly connected to the outer wall of the rotating shaft (6) along its axial direction. The other end of the corrugated plate (5) is adapted to the groove (2). The corrugated plate (5) is adapted to the expansion section. The expansion section includes a plurality of electrically controlled top cylinders (8), which are arranged at equal intervals. The fixed end of the electrically controlled top cylinder (8) is fixedly connected to the side wall of the groove (2). The telescopic ends of any two adjacent electrically controlled top cylinders (8) are arranged in opposite directions. The telescopic ends of the electrically controlled top cylinder (8) are adapted to the corrugated plate (5). The side post (4) has two rotating grooves (10) on the side near the locking post (1), and the rotating shaft (6) corresponds to the rotating groove (10) and is rotatably disposed in the rotating groove (10); The rotating shaft (6) is fixedly connected to two ends with connecting lugs (9), and the top and bottom walls of the rotating groove (10) are respectively provided with connecting holes (11), and the connecting lugs (9) are rotatably connected to the connecting holes (11).
2. The joint structure of a diaphragm wall according to claim 1, characterized in that, A pointed cone (7) is fixedly connected to the bottom end of the side post (4).
3. The joint structure of a diaphragm wall according to claim 1, characterized in that, The locking post (1) has a weight-reducing hole (3) coaxially formed inside.
4. A construction method for the joint structure of a diaphragm wall as described in any one of claims 1-3, characterized in that, Includes the following steps: S1. Place a lock post (1) vertically between the two sections of underground diaphragm wall; S2. Place a side column (4) between the lock column (1) and the end of the underground continuous wall, and then open the free ends of the two corrugated plates (5) to an angle that matches the groove (2). S3. Control the extension end of the electric top cylinder (8) to press the free end of the corrugated plate (5) against the inner wall of the groove (2); S4. Begin pouring the underground continuous wall on both sides of the lock column (1); S5. After the underground continuous wall solidifies and forms, the telescopic end of the electrically controlled top cylinder (8) is shortened to release the clamping state on the corrugated plate (5). S6. Bring the free ends of the two corrugated plates (5) together so that the outer surface of the free end of the corrugated plate (5) is separated from the solidified underground continuous wall. S7. Remove the lock column (1), side column (4), and corrugated plate (5) from between the two solidified sections of the underground continuous wall.