A trench support device and a method of construction thereof

Abstract

The application discloses a trench supporting device and a construction method thereof, relates to the field of pipeline trench construction, and comprises a plurality of supporting components, wherein the supporting component comprises a plurality of supporting assemblies, the supporting assemblies are supported between steel sheet piles on both sides of the trench along a vertical direction, the supporting assembly comprises two fixing blocks and a supporting unit arranged between the two fixing blocks, the two fixing blocks are used for being respectively mounted on the steel sheet piles on both sides of the trench to be constructed, and the supporting component further comprises a pay-off assembly, adjacent supporting assemblies are close to or away from each other through the pay-off assembly. Through arrangement of the pay-off assembly, the supporting assembly can be conveniently lowered, so that the interference of the upper supporting assembly can be avoided when the lower supporting assembly is installed, and the installation of the lower supporting assembly is facilitated.

Description

Technical Field

[0001] This application relates to the field of pipeline trench construction, and in particular to a trench support device and its construction method. Background Technology

[0002] Currently, during pipeline trench construction, sheet piles are typically inserted on both sides of the trench along its length. The first layer of the trench is then excavated, and support devices are used between the exposed portions of the sheet piles. The second layer is then excavated, and support devices are again used between the portions of the sheet piles in the second layer, with a certain vertical spacing between adjacent support devices. This process is repeated until the trench is fully excavated. The pipeline is then installed in the trench, and after installation, the support devices are removed and the trench is backfilled. The support devices in this technology generally use support rods, which are installed between the sheet piles to support them and ensure stability.

[0003] Regarding the aforementioned technologies, for deeper trenches, as the trenches become deeper during actual construction, the installation of lower-level support devices becomes increasingly difficult. Due to the trench's depth, a crane is needed to lower the support devices into the trench, and then manual labor is required to support them between two opposing sheet piles. However, because of the existing upper-level support devices above the trench, the crane is easily obstructed when lowering the lower-level support devices, causing inconvenience in their installation. Summary of the Invention

[0004] To facilitate the installation of the lower support device, this application provides a support device for a trench and its construction method.

[0005] Firstly, the trench support device provided in this application adopts the following technical solution:

[0006] A trench support device includes multiple support components, each support component including multiple support assemblies, which are vertically spaced between sheet piles on both sides of the trench. Each support assembly includes two fixing blocks and a support unit disposed between the two fixing blocks. The two fixing blocks are used to be installed on the sheet piles on both sides of the trench to be constructed. The support component also includes an unwinding assembly, and adjacent support assemblies are brought closer or further apart by the unwinding assembly.

[0007] By adopting the above technical solution, after the first layer of trench construction is completed, the uppermost support component of the support members is installed between the sheet piles on both sides of the trench. Then, the lower layer of trench is excavated. Then, the support components adjacent to the uppermost support component are lowered using the unwinding assembly, and the support components adjacent to the uppermost support component are installed between the sheet piles on both sides of the lower layer of trench. This process is repeated until the trench is excavated. Multiple support units are installed vertically between the sheet piles on both sides of the trench. The unwinding assembly facilitates the lowering of the support components, thus avoiding interference with the upper support components when installing the lower support components, thereby facilitating the installation of the lower support components.

[0008] Optionally, the fixing block is provided with a clamping assembly, which is used to clamp the protrusion of the sheet pile so that multiple support assemblies are aligned in the vertical direction.

[0009] By adopting the above technical solution, for Larssen sheet piles, the clamping component can clamp the protrusion of the sheet pile, thereby preventing multiple support components from being misaligned in the vertical direction and affecting the support effect.

[0010] Optionally, the clamping assembly includes two clamping rods slidably disposed on the fixed block, the two clamping rods being close to each other to clamp the protrusion of the steel sheet pile, and the two clamping rods being moved closer to each other or further apart by a screw drive component.

[0011] By adopting the above technical solution, when clamping the protruding part of the steel sheet pile, the two clamping rods are driven to move closer to each other through the screw drive component, so that the two clamping rods clamp the protruding part of the steel sheet pile. The clamping assembly has a simple structure and is easy to operate.

[0012] Optionally, hooks for attaching to the upper end of the sheet pile are installed on the fixing blocks of the uppermost support assembly.

[0013] By adopting the above technical solution, it is easy to install the uppermost support component on the upper end of the steel sheet pile.

[0014] Optionally, the support unit includes two telescopic rods, the fixed end of the telescopic rods is fixedly connected to the fixed block, and the telescopic end of the telescopic rods is fixedly connected to a fixed plate. The telescopic rods extend to make the two fixed plates abut against each other. The fixed block is provided with a driving component for driving the telescopic rods to extend and retract.

[0015] By adopting the above technical solution, after the uppermost support component is installed on the sheet piles, when the lower support component needs to be installed, the lower support component is lowered to the appropriate position using the unwinding component. Then, the telescopic rod is extended using the driving component, causing the two fixed plates to abut against each other, and the fixed block abuts against the sheet piles, thus keeping the support component stable. This eliminates the need for manual installation of the lower support component in the trench, making it simple and convenient, and also facilitating the disassembly of the support component. In addition, due to construction errors, the two rows of sheet piles on both sides of the trench may be misaligned, meaning that the protrusion of the sheet pile on one side of the trench is not aligned with the protrusion of the sheet pile on the other side. If a telescopic rod is simply installed between the two fixed blocks, one of the fixed blocks may not be centered on the protrusion, causing the clamping component to malfunction and weakening the support effect of the support component on the sheet piles. However, with the setting of two telescopic rods and fixed plates, the two fixed plates can abut against each other under the action of the telescopic rods, so that the support component can still provide a good support effect when the two rows of sheet piles are misaligned.

[0016] Optionally, the telescopic rod includes a sleeve and an extension rod. The sleeve is fixedly connected to the fixed block. One end of the extension rod is inserted into and slidably disposed along the length of the sleeve at the end of the sleeve away from the fixed block. The other end of the extension rod is fixedly connected to the fixed plate. The driving component includes an air pump, and the air outlet of the air pump is connected to the sleeve.

[0017] By adopting the above technical solution, when the telescopic rod is extended or retracted, the air pump is turned on to inject air into the sleeve, so that the extension rod extends under the action of air pressure. When the telescopic rod needs to retract, the air pump is turned on to evacuate the sleeve. The driving component has a simple structure and is easy to operate.

[0018] Optionally, a connecting block is fixedly connected to one end of the fixed plate, a rod is inserted into the fixed plate, a slot is provided on the fixed plate for the rod to be inserted, a through hole is provided on the connecting block for the rod to pass through, the rod slides to pass through the through hole, an air passage is provided on the extension rod, the sleeve is connected to the slot through the air passage, a retaining plate is inserted into the fixed plate, a spring is provided on the fixed plate for driving the retaining plate part to be located outside the fixed plate, an opening is provided on the retaining plate for the rod to pass through, and two fixed plates of the same telescopic unit abut against each other to drive the retaining plate to slide and open the opening for the rod to pass through.

[0019] By adopting the above technical solution, in the initial position, the clamping plate is partially located outside the fixed plate under the action of spring one, and the insertion rod is blocked by the clamping plate and cannot move. Thus, when air is injected into the sleeve by the air pump, the extension rod extends out of the sleeve to allow the telescopic rod to extend. After the two fixed plates abut against each other, the clamping plate is pressed into the fixed plate by the fixed plate. At this time, the opening on the clamping plate is aligned with the insertion rod. If air is continued to be injected into the sleeve, the gas will enter the slot through the air pump, allowing the insertion rod to pass through the opening and then through the perforation, thereby completing the connection of the two fixed plates and ensuring the stability of the two telescopic rods. Especially when the contact area between the two fixed plates is small, it prevents the two fixed plates from separating, thereby preventing the support assembly from losing its effect.

[0020] Secondly, this application also provides a construction method for a trench support device, employing the following technical solution:

[0021] A construction method for a trench support device includes the following steps: Step 1, inserting a row of steel sheet piles on both sides of the trench to be constructed along its length; Step 2, excavating the soil layer between the two rows of steel sheet piles to form the first layer of the pipeline trench; Step 3, installing multiple support components between the upper ends of the two rows of steel sheet piles; Step 4, excavating the soil layer between the two rows of steel sheet piles to form the second layer of the pipeline trench; Step 5, using an unwinding assembly, lowering one of the support units from the support components into the second layer of the pipeline trench and supporting it between the two rows of steel sheet piles on both sides of the pipeline trench; Step 6, continuing to excavate the pipeline trench and installing the support unit in the manner described in Step 5 until the pipeline trench excavation is completed.

[0022] By adopting the above technical solution, the stability of the sheet piles is ensured by excavating one layer of trench and installing one support unit at a time. In addition, the lower support components are installed between the sheet piles on both sides of the lower trench by unwinding, eliminating the need for a crane. Furthermore, the upper support components do not interfere with the installation of the lower support components. The construction is quick, simple to operate, and saves time and effort.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] 1. This application, through the setting of the unwinding component, facilitates the lowering of the support component, thereby avoiding interference from the upper support component when installing the lower support component, thus facilitating the installation of the lower support component;

[0025] 2. This application sets the support unit as two telescopic rods and fixes a fixing plate at the telescopic end of the two telescopic rods, which can still provide good support when the sheet piles on both sides are misaligned. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a trench support device applied to a trench according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the overall structure of one of the supporting components of a trench support device according to an embodiment of this application;

[0028] Figure 3 yes Figure 2 A sectional view;

[0029] Figure 4 yes Figure 3 Enlarged view of region A in the middle;

[0030] Figure 5 yes Figure 3 Enlarged view of region B in the middle;

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Support component; 2. Sheet pile; 3. Support assembly; 4. Support unit; 5. Fixing block; 6. Hook; 7. Inner cavity; 8. Motor 1; 9. Winding roller; 10. Pull rope; 11. Clamping rod; 12. Clamping plate; 13. Two-way lead screw; 14. Motor 2; 15. Telescopic rod; 16. Fixing plate; 17. Sleeve; 18. Extension rod; 19. Air pump; 20. Connecting block; 21. Insert rod; 22. Slot; 23. Perforation; 24. Clamping plate; 25. Clearance groove; 26. Air passage; 27. Spring 1; 28. Opening; 29. ​​Spring 2; 30. Protrusion; 31. Hose. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a support device for a trench. (Refer to...) Figure 1 and Figure 2 The support device includes multiple support components 1, which are installed at intervals along the length of the trench between two rows of sheet piles 2 on both sides of the trench. Each support component 1 includes multiple support assemblies 3, which are vertically spaced between the sheet piles 2 on both sides of the trench. In this embodiment, the sheet piles 2 are Larssen sheet piles. In this embodiment, three support assemblies 3 are used. For ease of description, the support assemblies 3 will be described as three in the following text.

[0035] Reference Figure 2 and Figure 3The support assembly 3 includes two fixed blocks 5 and a support unit 4 disposed between the two fixed blocks 5. Hooks 6 are fixedly connected to the two fixed blocks 5 of the upper support assembly 3. The hooks 6 can be hung on the upper end of the sheet pile 2. Unwinding assemblies are installed on the two fixed blocks 5 of the upper support assembly 3 and the two fixed blocks 5 of the middle support assembly 3. The fixed blocks 5 have an inner cavity 7. The unwinding assembly is disposed in the inner cavity 7. The unwinding assembly includes a motor 8 and a winding roller 9. The winding roller 9 is rotatably connected to the fixed block 5. The motor 8 is fixedly connected to the fixed block 5 by screws. The output shaft of the motor 8 is coaxially fixedly connected to the winding roller 9. A pull rope 10 is wound and fixedly connected to the winding roller 9. The pull rope 10 on the fixed block 5 of the upper support assembly 3 is fixedly connected to the corresponding fixed block 5 of the middle support assembly 3. The pull rope 10 on the fixed block 5 of the middle support assembly 3 is fixedly connected to the corresponding fixed block 5 of the lower support assembly 3.

[0036] When installing the support component 3, first install the upper support component 3 onto the sheet pile 2 via the hook 6. When the middle support component 3 needs to be installed, drive the winding roller 9 on the upper support component 3 to rotate via the motor 8, so that the pull rope 10 is unwound, and lower the middle support component 3 to the appropriate position. Then, install the fixing block 5 of the middle support component 3 onto the sheet pile 2. When the lower support component 3 needs to be installed, drive the winding roller 9 on the middle support component 3 to rotate via the motor 8, so that the pull rope 10 is unwound, and lower the lower support component 3 to the appropriate position. Then, install the fixing block 5 of the lower support component 3 onto the sheet pile 2.

[0037] Reference Figure 1 and Figure 4 To facilitate vertical alignment of the three support components 3, each support component 3 has a clamping assembly on each of its two fixing blocks 5. The clamping assembly is used to clamp the protrusion 30 of the sheet pile 2. The clamping assembly includes two clamping rods 11 slidably mounted on the fixing blocks 5. The clamping rods 11 slide out of the inner cavity 7. The ends of the two clamping rods 11 that are far apart from each other are fixedly connected to clamping plates 12. The two clamping rods 11 are brought close to each other so that the two clamping plates 12 clamp the protrusion 30 of the sheet pile 2. A bidirectional screw rod 13 is rotatably connected to the fixing block 5. The portions of the two clamping plates 12 located in the inner cavity 7 are respectively threaded onto the two reverse thread lines of the bidirectional screw rod 13. A second motor 14 is fixedly connected to the outer wall of the fixing block 5. The second output shaft of the motor is coaxially fixedly connected to one end of the bidirectional screw rod 13.

[0038] Reference Figure 4 and Figure 5In addition, it facilitates the support of the middle layer support assembly 3 and the lower layer support assembly 3 between the two rows of steel sheet piles 2. The support unit 4 includes two telescopic rods 15. The fixed end of the telescopic rod 15 is fixedly connected to the outer wall of the fixing block 5. The telescopic end of the telescopic rod 15 is fixedly connected to a fixing plate 16. The length direction of the fixing plate 16 is set along the length direction of the trench. The telescopic rod 15 extends so that the two fixing plates 16 abut against each other. The fixing block 5 is provided with a driving component for driving the telescopic rod 15 to extend and retract.

[0039] When installing the middle support assembly 3 and the lower support assembly 3, the two telescopic rods 15 are extended by the driving component until the two fixed plates 16 abut and the fixed block 5 abuts against the steel sheet pile 2, thereby ensuring the stability of the support assembly 3. At the same time, when the two rows of steel sheet piles 2 are misaligned, since the fixed plate 16 has a certain length, even if the two rows of steel sheet piles 2 are misaligned to a certain extent (the misalignment distance is within the length of the fixed plate 16), the two fixed plates 16 can still abut, thus not affecting the support effect of the support assembly 3.

[0040] The telescopic rod 15 includes a sleeve 17 and an extension rod 18. The sleeve 17 is fixedly connected to the fixing block 5. One end of the extension rod 18 is inserted into and slidably disposed along the length of the sleeve 17 at the end of the sleeve 17 away from the fixing block 5. The other end of the extension rod 18 is fixedly connected to the fixing plate 16. The driving component includes an air pump 19. The air outlet of the air pump 19 is connected to the sleeve 17 through a hose 31. By inflating or deflating the sleeve 17 with the air pump 19, the telescopic rod 15 can be extended or shortened.

[0041] In this embodiment, a storage battery is installed on the fixing block 5, and the power for motor 8, motor 14 and air pump 19 all comes from the storage battery.

[0042] In addition, to ensure the stability of the two fixed plates 16 when they abut, a connecting block 20 is fixedly connected to one end of the fixed plate 16. A rod 21 is inserted into the fixed plate 16. The fixed plate 16 has a slot 22 for inserting the rod 21. The connecting block 20 has a through hole 23 for the rod 21 to pass through. The rod 21 slides to pass through the through hole 23. When the two fixed plates 16 abut, the rod 21 extends out of the fixed plate 16 and can be inserted into the through hole 23 of the other fixed plate 16. In order to allow the rod 21 to slide, an air passage 26 is provided on the extension rod 18. The sleeve 17 is connected to the slot 22 through the air passage 26. A retaining plate 24 is inserted into the side of the two fixed plates 16 that are close to each other along the thickness direction of the fixed plate 16. The fixed plate 16 has a relief groove 25 for the retaining plate 24 to be fully inserted. A spring 27 is fixedly connected in the relief groove 25 along the insertion direction of the retaining plate 24. The other end of the spring 27 is fixedly connected to the retaining plate 24. The retaining plate 24 has an opening 28 for the insertion rod 21 to pass through. When the spring 27 is not deformed, part of the retaining plate 24 is located outside the fixed plate 16, and the opening 28 and the insertion rod 21 are misaligned. When the retaining plate 24 is completely located in the relief groove 25, the opening 28 and the insertion rod 21 are aligned.

[0043] To facilitate the reset of the insertion rod 21, a second spring 29 is fixedly connected in the slot 22 along the sliding direction of the insertion rod 21. The other end of the second spring 29 is fixedly connected to the insertion rod 21. When the second spring 29 is not deformed, the insertion rod 21 is blocked by the clamping plate 24.

[0044] When the two fixed plates 16 come into contact, the clamping plate 24 is squeezed by the fixed plate 16 and fully enters the relief groove 25. At this time, the opening 28 and the insertion rod 21 are aligned. If air is injected into the sleeve 17 through the air pump 19, the air will enter the slot 22 through the air passage 26, pushing the insertion rod 21 out of the opening 28 and into the through hole 23, thereby stabilizing the connection between the two connecting plates.

[0045] The implementation principle of a trench support device according to an embodiment of this application is as follows: When installing the support component 3, the upper support component 3 is first installed on the sheet pile 2 via the hook 6. When the middle support component 3 needs to be installed, the winding roller 9 on the upper support component 3 is rotated by the motor 8, so that the pull rope 10 is unwound, and the middle support component 3 is lowered to the appropriate position. Then, air is injected into the sleeve 17 by the air pump 19, so that the telescopic rod 15 is extended until the two fixed plates 16 abut. During this process, the fixed plate 16 pushes the clamping plate 24 to fully enter the clearance groove 25. At this time, the opening 28 and the insertion rod 21 are aligned. If air is injected into the sleeve 17 by the air pump 19, the air enters the slot 22 through the air passage 26, pushing the insertion rod 21 out of the opening 28 and into the through hole 23. The installation principle of the lower support component 3 is the same, and will not be described again.

[0046] This application also provides a method for constructing a trench support device, comprising the following steps:

[0047] Step 1: Insert two rows of steel sheet piles on both sides of the trench to be constructed along its length.

[0048] Step 2: Excavate the first layer trench and install the upper layer support component 3 on the upper end of the steel sheet pile 2 using hooks 6;

[0049] Step 3: Use the two clamping rods 11 to clamp the protrusion 30 of the steel sheet pile 2 with the upper support component 3, so that the support component 3 is located on the vertical center line of the protrusion 30 of the steel sheet pile 2.

[0050] Step 4: Extend the telescopic rod 15 of the upper support component 3 by using the air pump 19 until the two fixed plates 16 of the upper support component 3 abut together and connect the two fixed plates 16 together by inserting the rod 21.

[0051] Step 5: Excavate the intermediate trench;

[0052] Step 6: Use the unwinding assembly to lower the middle layer support assembly 3 into the middle layer groove;

[0053] Step 7: Extend the telescopic rod 15 of the middle layer support component 3 by using the air pump 19 until the two fixed plates 16 of the middle layer support component 3 abut against each other and are connected together by the insertion rod 21.

[0054] Step 8: Excavate the lower trench and install the lower support component 3 (the excavation method of the middle trench and the installation method of the middle support component 3 in steps 5-7 will not be repeated here).

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A trench support device, comprising a plurality of support components (1), wherein each support component (1) comprises a plurality of support assemblies (3), the plurality of support assemblies (3) being vertically spaced between sheet piles (2) on both sides of the trench, characterized in that: The support assembly (3) includes two fixed blocks (5) and a support unit (4) disposed between the two fixed blocks (5). The two fixed blocks (5) are used to be installed on the sheet piles (2) on both sides of the trench to be constructed. The fixed block (5) on the uppermost support assembly (3) is equipped with a hook (6) for hanging on the upper end of the sheet pile (2). The support unit (4) includes two telescopic rods (15). The fixed end of the telescopic rod (15) is fixedly connected to the fixed block (5), and the telescopic end of the telescopic rod (15) is fixedly connected to a fixed plate (16). (15) Extend to bring the two fixed plates (16) abut together; the fixed block (5) is provided with a driving component for driving the telescopic rod (15) to extend and retract; the telescopic rod (15) includes a sleeve (17) and an extension rod (18), the sleeve (17) is fixedly connected to the fixed block (5), one end of the extension rod (18) is inserted into and slides along the length of the sleeve (17) at the end of the sleeve (17) away from the fixed block (5), the other end of the extension rod (18) is fixedly connected to the fixed plate (16), and the driving component includes an air pump (19). The air outlet of the air pump (19) is connected to the sleeve (17); a connecting block (20) is fixedly connected to one end of the fixing plate (16), a rod (21) is inserted into the fixing plate (16), a slot (22) for inserting the rod (21) is provided on the fixing plate (16), a through hole (23) for the rod (21) to pass through is provided on the connecting block (20), the rod (21) slides to pass through the through hole (23), an air passage (26) is provided on the extension rod (18), and the sleeve (17) is connected to the sleeve (17) through the air passage (26). The slot (22) has a card plate (24) inserted into the fixing plate (16). The fixing plate (16) is provided with a spring (27) for driving the card plate (24) to be partially located outside the fixing plate (16). The card plate (24) has an opening (28) for the insertion rod (21) to pass through. The two fixing plates (16) of the same telescopic unit abut against each other to drive the card plate (24) to slide and allow the insertion rod (21) to pass through the opening (28). The support component (1) also includes an unwinding assembly. Adjacent support components (3) are close to or far away from each other through the unwinding assembly. The fixed block (5) has an inner cavity (7), and the unwinding assembly is set in the inner cavity (7). The unwinding assembly includes a motor (8) and a take-up roller (9). The take-up roller (9) is rotatably connected to the fixed block (5). The motor (8) is fixedly connected to the fixed block (5) by screws. The output shaft of the motor (8) is coaxially fixedly connected to the take-up roller (9). A pull rope (10) is wound and fixedly connected on the take-up roller (9). The pull rope (10) on the upper support assembly (3) fixed block (5) is fixedly connected to the fixed block (5) corresponding to the middle support assembly (3). The pull rope (10) on the middle support assembly (3) fixed block (5) is fixedly connected to the fixed block (5) corresponding to the lower support assembly (3).

2. The trench support device according to claim 1, characterized in that: The fixing block (5) is provided with a clamping assembly, which is used to clamp the protrusion (30) of the sheet pile (2) so that the multiple support assemblies (3) are aligned in the vertical direction.

3. The trench support device according to claim 2, characterized in that: The clamping assembly includes two clamping rods (11) slidably disposed on the fixed block (5). The two clamping rods (11) approach each other to clamp the protrusion (30) of the steel sheet pile (2). The two clamping rods (11) move closer or further apart from each other through a screw drive.

4. A construction method for a trench support device according to any one of claims 1-3, characterized in that: The process includes the following steps: Step 1, inserting a row of sheet piles (2) on both sides of the trench to be constructed along its length; Step 2, excavating the soil layer between the two rows of sheet piles (2) to form the first layer of the pipeline trench; Step 3, installing multiple support components (1) between the upper ends of the two rows of sheet piles (2); Step 4, excavating the soil layer between the two rows of sheet piles (2) to form the second layer of the pipeline trench; Step 5, using a roll-up assembly, lowering one of the support units (4) on the support component (1) into the second layer of the pipeline trench and supporting it between the two rows of sheet piles (2) on both sides of the pipeline trench; Step 6, continuing to excavate the pipeline trench and installing the support unit (4) in the manner of Step 5 until the pipeline trench is excavated.

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