Steel sheet pile support structure and construction method

Abstract

The application relates to the field of building construction, and discloses a steel sheet pile supporting structure and a construction method, which comprise a steel beam located between two steel sheet piles, a driving rod rotatably arranged at the center of the steel beam, and a lifting seat connected with the bottom end of the driving rod through the steel beam; when the driving rod rotates on the steel beam, the driving rod is used for providing a driving force to the lifting seat, so that the lifting seat is linearly adjusted along the axial direction of the driving rod; the two ends of the lifting seat are respectively hinged with driving arms, and one end of the driving arm is connected with a first supporting rod slidingly arranged in the steel beam; when the driving rod rotates on the steel beam, the driving rod can provide a driving force to the lifting seat, so that the lifting seat can move along the axial direction of the driving rod and provide a driving force to the driving arm, so that the lifting seat can drive the first supporting rod to slide on the steel beam through the driving arm, thereby adjusting the use length of the first supporting rod according to the interval of the two supporting plates, and the application has strong flexibility.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a steel sheet pile support structure and construction method. Background Technology

[0002] Sheet pile support is a common and efficient form of deep foundation and pit retaining structure. It primarily uses hot-rolled or cold-bent interlocking sheet piles, which are interlocked to form a continuous retaining plate. Its core advantages lie in its high strength and excellent water-stopping properties, effectively resisting soil and water pressure and ensuring safety during operations within the pit. During construction, vibratory hammers or static pile drivers are typically used to drive the sheet piles to the designed depth. After the project is completed, most sheet piles can be extracted and reused, offering economic and environmental benefits. It is widely used in port terminals, riverbank protection, underground tunnels, and building foundation pits.

[0003] After sheet piles are driven into the foundation pit, they are usually supported by a support structure to prevent tilting or even collapse during use. However, current support structures typically use square or round steel to directly support the sheet piles. This method has two shortcomings: First, the support plates are usually erected according to construction needs and cannot be flexibly adjusted according to the spacing between two support plates, resulting in poor adaptability. Second, current support structures can only support the upper or lower part of the support plate, and cannot provide multi-point support for both the upper and lower parts of the support plate simultaneously, resulting in poor support effect.

[0004] Therefore, we propose a steel sheet pile support structure and construction method to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems mentioned above.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A sheet pile support structure includes a steel beam located between two sheet piles. A drive rod is rotatably mounted at the center of the steel beam, and the bottom end of the drive rod passes through the steel beam and connects to a lifting seat. When the drive rod rotates on the steel beam, it provides driving force to the lifting seat, allowing the lifting seat to be linearly adjusted along the axis of the drive rod. Drive arms are hinged to both ends of the lifting seat, and one end of each drive arm is connected to a primary support rod slidably mounted inside the steel beam. The primary support rod is used to support the upper part of the sheet pile. Adjusting rods are symmetrically rotatably mounted inside the steel beam, with the rotating end of the adjusting rod positioned close to the drive rod. A telescopic steering component is provided at the connection between the drive arm and the adjusting rod. A telescopic secondary support rod is mounted at one end of the adjusting rod, and the free end of the secondary support rod is used to support the lower part of the sheet pile.

[0007] Furthermore: a threaded drive seat is fixed at the center of the steel beam, and the upper part of the drive rod is connected to the threaded drive seat by a thread. A rotating sleeve facing upwards is fixed at the center of the lifting seat, and the lower part of the drive rod is rotatably installed inside the rotating sleeve.

[0008] Furthermore, guide grooves are respectively opened on both sides of the primary support rod along the length direction, and guide rails are respectively fixed on the two inner side walls of the steel sheet pile, and the two guide rails are respectively slidably installed inside the guide grooves to limit the movement trajectory of the primary support rod.

[0009] Furthermore: the top of the primary support rod is provided with a receiving groove along its length, and a one-way locking tooth is fixed inside the receiving groove. One-way locking components that cooperate with the one-way locking teeth are respectively installed at both ends of the steel beam. The locking part of the one-way locking component extends through the steel beam into the interior of the one-way locking tooth to lock the support rod in one direction.

[0010] Furthermore: the one-way locking assembly includes a square groove formed at the end of the steel beam, and rotating supports fixed on the steel beam are respectively provided on both sides of the square groove. The same ratchet is rotatably installed between the two rotating supports, and the locking part of the ratchet passes through the square groove and is locked on the one-way locking tooth.

[0011] Furthermore: a rotating component is fixed to the top of the adjusting rod, and two rotating shafts are symmetrically fixed to the inner sidewall of the steel beam. The two sides of the rotating component are respectively rotatably mounted on the rotating shafts so that the adjusting rod can be rotated and adjusted on the two rotating shafts.

[0012] Furthermore: the telescopic steering component includes a through hole on the drive arm, and rotating plates fixed on the drive arm are respectively provided on both sides of the through hole. The same telescopic sleeve is rotatably installed between the two rotating plates, and the adjusting rod is slidably installed inside the rotating sleeve.

[0013] Furthermore: the outer surface of the secondary support rod is provided with external threads, the inner circumference of the adjusting rod is fixed with external threads, and the secondary support rod is installed inside the adjusting rod in sequence through internal threads and external threads.

[0014] Furthermore: one end of the primary support rod is fixed with a first connecting lug; one end of the secondary support rod is fixed with a rotating support, and a second connecting lug is hinged to the rotating support.

[0015] A construction method for a steel sheet pile support structure includes the following steps: S1: Pre-fix support plates on both sides of the foundation pit; Several sheet piles are driven into the pit from both sides, so that two adjacent sheet piles interlock with each other. Finally, several sheet piles in the same row form a support plate. The support plates on both sides support the sides of the pit to prevent the soil on the sides of the foundation from falling into the pit. S2: Adjust the service length of the primary support rod according to the distance between the two support plates; The drive rod is rotated and adjusted so that the lifting seat moves linearly along the axis of the drive rod. The lifting seat provides driving force to the first-level support rod through the drive arms on both sides, so that the first-level support rod extends and retracts along the length of the steel beam, thereby adjusting the working length of the first-level support rod according to the width of the two support plates. S3: Adjust the angle using the adjusting rod; While the drive arm provides driving force to the first-level support rod, the position of the drive arm also changes accordingly, so that the drive arm drives the adjusting rod to rotate through the telescopic steering component, so that the adjusting rod can be adjusted in angle on the steel beam; S4: Adjust the service length of the secondary support structure; The secondary support rod can be rotated and adjusted in opposite directions within the adjusting rod, allowing the secondary support rod to extend and retract within the adjusting rod, thus flexibly adjusting the length of the secondary support rod. S5: Install two rows of fixing structures on the sides of the two support plates respectively; Two rows of fixed brackets are fixedly welded to the side of the support plate, and a reinforcing rod is placed on the top of each row of fixed brackets. The distance between the two rows of reinforcing rods is the same as the distance from the end of the first-level support rod to the end of the second-level support rod. S6: Sheet piles are supported by a support structure; The first connecting lug at the end of the primary support rod is fixed to the upper reinforcing rod by a fixing bolt; the second connecting lug at the end of the secondary support rod is fixed to the lower reinforcing rod by a fixing bolt. Through the cooperation of the primary and secondary support rods, the upper and lower parts of the two support plates can be supported.

[0016] The beneficial effects of this invention are: 1. When the drive rod of the present invention rotates on the steel beam, it can provide driving force to the lifting seat, so that the lifting seat can move along the axial direction of the drive rod and provide driving force to the drive arm, so that the lifting seat can drive the first-level protection rod to slide on the steel beam through the drive arm. This allows the length of the first-level protection rod to be adjusted according to the distance between the two support plates, which has strong flexibility and improves the application range of the support device.

[0017] 2. The present invention has one-way locking teeth on the support rod and one-way locking components installed at the ends of the steel beam. Through the cooperation of the one-way locking components and the one-way locking teeth, the primary support rod is locked to prevent it from expanding and contracting into the steel beam during use, thus providing strong stability.

[0018] 3. When the drive arm of the present invention drives the primary protective rod to slide within the steel beam, the position of the drive arm will also change accordingly and drive the adjusting rod to adjust the angle. Secondly, the secondary support rod can also be extended and retracted within the adjusting rod so that the second connecting ear at the end of the secondary support rod can fix the lower part of the support plate, thereby supporting the lower part of the support plate. This allows for simultaneous support of the upper and lower parts of the support plate, further improving the stability of the support plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure in use of the present invention; Figure 2 This is a schematic diagram of the support plate in this invention; Figure 3 This is a three-dimensional structural schematic diagram of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the present invention; Figure 5 This is a partial structural schematic diagram of the present invention (excluding the steel beams and primary support rods). Figure 6 This is a schematic diagram of the connection structure between the lifting seat and the primary support rod in this invention; Figure 7 This is a three-dimensional structural diagram of the drive arm in this invention; Figure 8 In this invention Figure 4 A partially enlarged structural diagram.

[0020] The names corresponding to each mark in the diagram: 1. Sheet pile; 2. Steel beam; 3. Drive rod; 4. Lifting seat; 5. Drive arm; 6. Primary support rod; 7. Adjusting rod; 8. Telescopic steering component; 801. Perforation; 802. Rotating plate; 803. Telescopic sleeve; 9. Secondary support rod; 10. Threaded drive seat; 11. Rotating sleeve; 12. Guide groove; 13. Guide groove; 14. Receiving groove; 15. One-way locking tooth; 16. One-way locking assembly; 1601. Square groove; 1602. Rotating support; 1603. Racket tooth; 17. Rotating component; 18. Rotating shaft. Detailed Implementation

[0021] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0022] Example 1 A sheet pile support structure includes a crossbeam 2 with a U-shaped cross section, and a drive rod 3 is provided at the center of the crossbeam 2. A rotating handwheel 22 is fixed to the top of the drive rod 3, and the rotating handwheel 22 is located on the upper part of the crossbeam 2. The rotating handwheel 22 allows for easier rotation and adjustment of the drive rod 3. The bottom end of the drive rod 3 passes through the crossbeam 2 and is rotatably connected to a lifting seat 4. Both ends of the lifting seat 4 are hinged to drive arms 5, and the end of the drive arm 5 away from the lifting seat 4 is hinged to a primary support rod 6. The primary support rod 6 slides along its length. The primary support rod 6 is installed inside the steel beam 2, and one end of the primary support rod 6 is fixed with a first connecting ear 19. The first connecting ear 19 can fix the upper part of the support plate. When the drive rod 3 is rotated and adjusted on the crossbeam 2, the lifting seat 4 can move along the axis of the drive rod 3. The lifting seat 4 can provide driving force to the primary support rod 6 through the drive arm 5, so that the primary support rod 6 can be adjusted along the length of the steel beam 2. Thus, the service length of the primary support rod 6 can be adjusted according to the distance between the two support plates, which has strong flexibility.

[0023] It should be noted that: a threaded drive seat 10 is fixed at the center of the crossbeam 2, and the upper thread of the drive rod 3 is installed inside the threaded drive seat 10. When the drive rod 3 rotates inside the threaded drive seat 10, the drive rod 3 can move along the axial direction and provide driving force to the lifting component 4 so that the lifting component 4 can be adjusted along the axial direction of the drive rod 3.

[0024] It should be noted that: a rotating sleeve 11 is fixed at the center of the lifting seat 4, and the rotating sleeve 11 is set facing upward. The bottom end of the drive rod 3 is rotatably installed inside the rotating sleeve 11. Normally, a bearing (not shown in the figure) is fixed at the connection between the drive rod 3 and the rotating sleeve 11. The bearing allows the drive rod 3 to rotate more smoothly inside the rotating sleeve 11.

[0025] Guide grooves 12 are provided on both sides of the primary support rod 6 along the length direction. Guide rails 13 are fixed on the two inner side walls of the crossbeam 2 along the length direction. The two guide rails 13 are slidably installed inside the guide grooves 12. Through the cooperation of the guide grooves 12 and the guide rails 13, the movement trajectory of the primary support rod 6 is limited, so that the primary support rod 6 can only move along the length direction of the steel beam 2, preventing the primary support rod 6 from falling downwards due to its own weight during use.

[0026] The top of the primary support rod 6 is provided with a receiving groove 14 along its length, and a one-way locking tooth 15 is installed inside the receiving groove 14. One-way locking components 16 are installed at both ends of the steel beam 2. Through the cooperation of the one-way locking components 16 and the one-way locking tooth 15, the primary support rod 6 is locked in one direction to prevent it from shrinking into the steel beam 2 during use, thus providing strong stability.

[0027] It should be noted that the one-way locking tooth 15 includes a tooth plate, and the top of the tooth plate is fixed with several teeth at equal intervals along the length direction. The teeth are set in the shape of a right trapezoid or a right triangle, and the vertical surface of the teeth faces the drive rod 3, so as to perform the function of one-way locking.

[0028] In detail: The one-way locking assembly 16 includes a square groove 1601 opened at the end of the steel beam 2, and rotating supports 1602 fixed on the steel beam 2 are respectively provided on both sides of the square groove 1601. The same ratchet 1603 is rotatably installed between the two rotating supports 1602. In use, the locking part of the ratchet 1603 passes through the square groove 1601 and is locked on the corresponding one-way locking tooth 15, thereby playing the role of one-way locking of the first-level support rod 6.

[0029] Example 2 Although the above embodiment 1 can be flexibly adjusted according to the spacing of the support plates and can be used for support plates with different spacings, when the above support structure supports the support plates, it can only support the upper or lower part of the support plates, resulting in poor stability. Therefore, in order to solve this technical problem, further improvements are made based on embodiment 1. An adjusting rod 7 is symmetrically and rotatably installed inside the steel beam 2. It should be noted that the rotating part of the adjusting rod 7 is located near the middle part of the steel beam 2. A telescopic steering component 8 is provided at the connection between the drive arm 5 and the adjusting rod 7. The telescopic steering component 8 is provided to prevent interference when the adjusting rod 7 is adjusted in angle, thus ensuring that the device can operate stably. In detail: The top of the adjusting component 7 is fixed with a rotating component 17, and two rotating shafts 18 are symmetrically fixed on the inner side wall of the steel beam 2. The two sides of the rotating component 17 are respectively rotatably mounted on the rotating shafts 18. Through the cooperation of the rotating component 17 and the rotating shafts 18, the adjusting component 7 can flexibly adjust the angle on the steel beam 2.

[0030] In detail: The telescopic steering component 8 includes a through hole 801 on the drive arm 5, and the through hole 801 is located close to the first-level support rod 6. Rotating plates 802 fixed on the drive arm 5 are respectively provided on both sides of the through hole 801. A telescopic sleeve 803 located in the through hole 801 is rotatably installed between the two rotating plates 802. Under normal circumstances, the adjusting rod 7 is slidably installed inside the telescopic sleeve 803, so that the adjusting rod 7 can not only adjust the angle with the position change of the drive arm 5, but also extend and retract along the axis of the telescopic sleeve 803, which has strong flexibility.

[0031] One end of the adjusting rod 7 is equipped with a telescopic secondary support rod 9, which allows for flexible adjustment based on the distance between the two support plates, providing high flexibility. Specifically, the outer surface of the secondary support rod 9 is fixed with external threads, while the inside of the adjusting rod 7 is provided with internal threads. The secondary support rod 9, through the cooperation of the internal and external threads, can be threadedly mounted inside the adjusting rod 7, allowing for flexible adjustment according to user needs, providing high flexibility. It should be noted that the end of the secondary support rod 9 furthest from the steel beam 2 is fixed with a rotating support 20, and a second connecting lug 21 is rotatably mounted on the rotating support 20. Through the cooperation of the rotating support 20 and the second connecting lug 21, the lower part of the support plate can be fixed, preventing loosening.

[0032] The construction method for this steel sheet pile support structure can be carried out in combination with the above-described Embodiments 1 and 2, and includes the following steps: S1: Pre-fix support plates on both sides of the foundation pit; Several sheet piles 1 are inserted downwards on both sides of the foundation pit, so that two adjacent sheet piles 1 interlock with each other. Finally, several sheet piles 1 in the same row form a support plate. By setting up two support plates, the side of the foundation pit can be supported to prevent the soil on the side of the foundation pit from loosening or falling. S2: Adjust the service length of the primary support rod 6 according to the distance between the two support plates; The support personnel rotate and adjust the drive rod 3 so that the lifting seat 4 moves linearly along the axis of the drive rod 3. The lifting seat 4 provides driving force to the first-level support rod 6 through the drive arms 5 on both sides, so that the first-level support rod 6 extends and retracts along the length of the steel beam 2, thereby adjusting the working length of the first-level support rod 6 according to the width of the two support plates. S3: Adjust the angle using adjusting rod 7; While the drive arm 5 provides driving force to the first-level support rod 6, the position of the drive arm 5 also changes accordingly, so that the drive arm 5 drives the adjusting rod 7 to rotate through the telescopic steering component 8, so that the adjusting rod 7 can be adjusted in angle on the steel beam 2; S4: Adjust the length of the secondary support structure 6; The secondary support rod 9 can be rotated and adjusted in a relative direction within the adjusting rod 7, allowing the secondary support rod 9 to extend and retract within the adjusting rod 7, thus flexibly adjusting the service length of the secondary support rod 9; S5: Install two rows of fixing structures on the sides of the two support plates respectively; Two rows of fixed brackets 102 are fixedly welded to the side of the support plate. A reinforcing rod 103 is placed on the top of each row of fixed brackets 102. The distance between the two rows of reinforcing rods 103 is the same as the distance from the end of the first-level support rod 6 to the end of the second-level support rod 9. S6: Support the sheet pile 1 using a support structure; The first connecting lug 19 at the end of the primary support rod 6 is fixed to the upper reinforcing rod 103 by a fixing bolt; the second connecting lug 21 at the end of the secondary support rod 9 is fixed to the lower reinforcing rod 103 by a fixing bolt. Through the cooperation of the primary support rod 6 and the secondary support rod 9, the upper and lower parts of the two support plates can be supported.

Claims

1. A sheet pile support structure, comprising a steel beam (2) located between two sheet piles (1), wherein a drive rod (3) is provided at the center of the steel beam (2), and the bottom end of the drive rod (3) passes through the steel beam (2) and is rotatably connected to a lifting seat (4), wherein when the drive rod (3) rotates on the steel beam (2), it provides driving force to the lifting seat (4) so ​​that the lifting seat (4) is linearly adjusted along the axial direction of the drive rod (3); both ends of the lifting seat (4) are respectively hinged to drive arms (5), and one end of the drive arm (5) is connected to a sliding... The primary support rod (6) is connected to the steel beam (2), and the primary support rod (6) is used to support the upper part of the sheet pile (1). The steel beam (2) is symmetrically and rotatably installed with an adjusting rod (7), and the rotating end of the adjusting rod (7) is set close to the driving rod (3). The connection between the driving arm (5) and the adjusting rod (7) is provided with a telescopic steering component (8). One end of the adjusting rod (7) is installed with a telescopic secondary support rod (9), and the free end of the secondary support rod (9) is used to support the lower part of the sheet pile (1).

2. The sheet pile support structure according to claim 1, characterized in that: A threaded drive seat (10) is fixed at the center of the steel beam (2), and the upper part of the drive rod (3) is connected to the threaded drive seat (10) by a thread. The center of the lifting seat (4) is fixed with an upward-facing rotating sleeve (11), and the lower part of the drive rod (13) is rotatably installed inside the rotating sleeve (11).

3. The sheet pile support structure according to claim 2, characterized in that: The first-level support rod (6) has guide grooves (12) opened on both sides along the length direction. The two inner walls of the steel beam (2) are respectively fixed with guide rails (13), and the two guide rails (13) are slidably installed inside the guide grooves (12) to limit the movement trajectory of the first-level support rod (6).

4. The sheet pile support structure according to claim 1, characterized in that: The top of the primary support rod (6) is provided with a receiving groove (14) along the length direction, and a one-way locking tooth (15) is fixed inside the receiving groove (14). One-way locking components (16) that cooperate with the one-way locking tooth (15) are respectively installed at both ends of the steel beam (2). The locking part of the one-way locking component (16) extends through the steel beam (2) into the one-way locking tooth (15) to lock the support rod (6) in one direction.

5. A sheet pile support structure according to claim 4, characterized in that: The one-way locking assembly (16) includes a square groove (1601) opened at the end of the steel beam (2). Rotary supports (1602) fixed on the steel beam (2) are respectively provided on both sides of the square groove (1601). The same ratchet (1603) is rotatably installed between the two rotating supports (1602), and the locking part of the ratchet (1603) passes through the square groove (1601) and is locked on the one-way locking tooth (15).

6. A sheet pile support structure according to claim 1, characterized in that: The top of the adjusting rod (7) is fixed with a rotating component (17), and two rotating shafts (18) are symmetrically fixed on the inner sidewall of the steel beam (2). The two sides of the rotating component (17) are respectively rotatably mounted on the rotating shafts (18) so that the adjusting rod (7) can be rotated and adjusted on the two rotating shafts (18).

7. A sheet pile support structure according to claim 1, characterized in that: The telescopic steering component (8) includes a through hole (801) on the drive arm (5), and rotating plates (802) fixed on the drive arm (5) are respectively provided on both sides of the through hole (801). The same telescopic sleeve (803) is rotatably installed between the two rotating plates (802), and the adjusting rod (7) is slidably installed inside the rotating sleeve (802).

8. A sheet pile support structure according to claim 1, characterized in that: The outer surface of the secondary support rod (9) is provided with an external thread, and the inner circumferential surface of the adjusting rod (7) is fixed with an external thread. The secondary support rod (9) is installed inside the adjusting rod (7) in sequence through the internal thread and the external thread.

9. A sheet pile support structure according to claim 1, characterized in that: One end of the primary support rod (6) is fixed with a first connecting lug (19); one end of the secondary support rod (9) is fixed with a rotating support (20), and a second connecting lug (20) is hinged on the rotating support (20).

10. A construction method for a steel sheet pile support structure, applied to the steel sheet pile support structure described in claims 1-9, characterized in that: Includes the following steps: S1: Pre-fix support plates on both sides of the foundation pit; Several sheet piles (1) are inserted downwards on both sides of the foundation pit so that two adjacent sheet piles (1) interlock with each other. Finally, several sheet piles (1) in the same row form a support plate. The support plate on both sides supports the side of the foundation pit to prevent the soil on the side of the foundation from falling into the interior of the foundation pit. S2: Adjust the service length of the primary support rod (6) according to the distance between the two support plates; The drive rod (3) is rotated and adjusted so that the lifting seat (4) moves linearly along the axis of the drive rod (3). The lifting seat (4) provides driving force to the first-level support rod (6) through the drive arms (5) on both sides, so that the first-level support rod (6) extends and retracts along the length of the steel beam (2), thereby adjusting the length of the first-level support rod (6) according to the width of the two support plates. S3: Adjust the angle using the adjusting rod (7); While the drive arm (5) provides driving force to the first-level support rod (6), the position of the drive arm (5) also changes accordingly, so that the drive arm (5) drives the adjusting rod (7) to rotate through the telescopic steering component (8), so that the adjusting rod (7) can be adjusted on the steel beam (2); S4: Adjust the length of the secondary support structure (6); The secondary support rod (9) is rotated and adjusted in opposite directions within the adjusting rod (7), so that the secondary support rod (9) can extend and retract within the adjusting rod (7) to flexibly adjust the length of the secondary support rod (9). S5: Install two rows of fixing structures on the sides of the two support plates respectively; Two rows of fixed brackets (102) are fixedly welded to the side of the support plate. A reinforcing rod (103) is placed on the top of each row of fixed brackets (102). The distance between the two rows of reinforcing rods (103) is the same as the distance from the end of the first-level support rod (6) to the end of the second-level support rod (9). S6: The sheet piles (1) are supported by a support structure; The first connecting lug (19) at the end of the primary support rod (6) is fixed to the upper reinforcing rod (103) by a fixing bolt; the second connecting lug (21) at the end of the secondary support rod (9) is fixed to the lower reinforcing rod (103) by a fixing bolt. Through the cooperation of the primary support rod (6) and the secondary support rod (9), the upper and lower parts of the two support plates can be supported.

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