Steel sheet pile water jet installation structure and installation method thereof

Abstract

The application belongs to the technical field of steel sheet piles, and provides a steel sheet pile water jet installation structure and an installation method thereof, which comprises a joint device, the joint device comprises a protection plate, the steel sheet pile is connected with the protection plate through a node plate, one end of the node plate is fixedly connected to the upper surface of the protection plate, and the other end of the node plate is bolted to the steel sheet pile; a short connecting pipe is connected to the upper surface of the node plate, the bottom end of the short connecting pipe is connected with a water jet nozzle; a hose is communicated with the top end of the short connecting pipe; and the device further comprises a detachable support for supporting and fixing the hose, the detachable support comprises a support plate, the two ends of the support plate are connected with side plates, the side plates are arranged in an L shape; the side plates are connected with guide rods, the guide rods are slidably connected with moving plates, the moving plates are fixedly connected with third bolts, the other ends of the third bolts are freely penetrated through the side plates and connected with third nuts. In use, the device has no welding points on the steel sheet pile, reduces damage to the structure of the steel sheet pile due to welding and other factors, has a reasonable structure, is convenient to disassemble and assemble, and has high practicability.

Description

Technical Field

[0001] This invention relates to the field of sheet pile technology, specifically to a water jet installation structure for sheet piles and its installation method. Background Technology

[0002] A sheet pile cofferdam is composed of multiple sheet piles, each of which needs to be driven into the soil to a certain depth. For some hard geological conditions, a water jet structure needs to be installed on the sheet piles to assist in pile driving. Currently, a common practice is to directly weld a seamless steel pipe onto the sheet pile and install a water jet nozzle at one end of the seamless steel pipe. For example, a water jet-assisted sheet pile driving structure disclosed in patent document CN217231822 U involves welding a steel pipe longitudinally along the inner wall of the sheet pile. The upper end of the steel pipe is connected to a high-pressure water pump via a flexible hose, and a conical nozzle is welded to the lower end of the steel pipe. This technical solution also has the following technical problems: 1. The steel pipe is directly welded to the sheet pile, which is inconvenient for later disassembly and replacement; if a non-welded flexible hose solution is used, the commonly used method is to directly weld a cross brace to the sheet pile, which is used to support and fix the flexible hose; however, welding is inconvenient for subsequent disassembly, and the high temperature generated during welding can easily cause deformation of the sheet pile. Therefore, how to effectively fix the flexible hose without affecting construction needs further research; 2. High temperatures are generated during welding, and there is a large residual stress in the weld and its heat-affected zone. The presence of residual stress will cause the steel plate to... 1. Deformation of the pile itself reduces its bearing capacity and causes significant damage to the structure of the sheet pile itself; 2. Once the steel pipe is welded to the sheet pile, it is inconvenient to remove it later. For construction conditions that do not require water jet structures, it cannot meet the requirements for flexible installation and removal, which is not conducive to the repeated use of sheet piles; 3. Since reusable sheet piles need to be driven into hard soil or gravel-containing soil, the ends of the sheet piles are easily damaged by hard soil or gravel, resulting in varying degrees of cracking, chipping, and edge curling, which affects the service life and performance of the sheet piles. Currently, there is a lack of an effective structure or device to protect the ends of the sheet piles. Summary of the Invention

[0003] To address the problems existing in the prior art, a water jet installation structure for sheet piles and its installation method are provided.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] This invention proposes a water jet installation structure for sheet piles, including a joint device. The joint device includes a protective plate, which is aligned with the bottom end of the sheet pile along its length. The sheet pile and the protective plate are connected by a node plate, one end of which is fixedly connected to the upper surface of the protective plate, and the other end of which is bolted to the sheet pile. A short connecting pipe is connected to the upper surface of the node plate, and a water jet nozzle is connected to the bottom end of the short connecting pipe. A flexible hose is connected to the top end of the short connecting pipe. The invention also includes a detachable support for supporting and fixing the flexible hose. The detachable support includes a support plate, both ends of which are connected to side plates for fastening to the rolled edge of the sheet pile. The side plates are arranged in an "L" shape. A guide rod is connected to the side plate, and a movable plate for pressing against the rolled edge of the sheet pile is slidably connected to the guide rod. A third bolt is fixedly connected to the movable plate, and the other end of the third bolt freely passes through the side plate and is connected to a third nut.

[0006] Preferably, the sheet pile has a first through hole, and the node plate has a second through hole corresponding to the position of the through hole; a first bolt is connected through the first through hole and the second through hole, and a first nut is fitted onto the first bolt.

[0007] Preferably, the thickness of the protective plate is the same as the wall thickness of the sheet pile.

[0008] Preferably, the node plate has multiple sets of threaded holes; it also includes pipe clamps for fixing short pipes, the pipe clamps being connected to the threaded holes by a second bolt.

[0009] Preferably, the node plate and the protective plate are arranged in a staggered manner in layers; a positioning slot is formed between the node plate and the protective plate, and when the bottom end of the steel sheet pile is positioned and engaged at the positioning slot, the centers of the first through hole and the second through hole are located on the same straight line in the X-axis direction.

[0010] Preferably, the support plate is U-shaped; a gap is left between the support plate and the web of the sheet pile.

[0011] Preferably, the movable plate has a slot for engaging with the edge of the sheet pile roll.

[0012] Preferably, the support plate is connected with reinforcing ribs.

[0013] This invention also proposes an installation method for a steel sheet pile water jet installation structure, comprising the following steps:

[0014] A. Install a joint device at the bottom end of the steel sheet pile;

[0015] A1. The protective plate and the node plate are prefabricated and welded together to form a whole. The whole is placed at the end of the sheet pile and the sheet pile is bolted to the node plate.

[0016] A2. Install the water jet nozzle to the outlet of the short connector in advance, and install the two together onto the node plate to complete the fixation of the short connector;

[0017] B. Connect the hose to the inlet of the short pipe;

[0018] C. Install detachable connectors near the top of the sheet pile;

[0019] C1. The installation method of sliding from the top of the sheet pile is adopted. The movable plate is inserted into the gap between the rolled edge and the flange plate. Then the support is slid along the length of the sheet pile. After the support plate slides to the appropriate position, the third nut on the third bolt is tightened so that the movable plate is tightly pressed against the edge of the rolled edge, thus completing the fixation of the support and the sheet pile.

[0020] D. Temporarily fix the hose to the support plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The joint device of this invention incorporates a protective plate designed for the end of the sheet pile. This protective plate, installed at the end of the sheet pile, effectively protects the sheet pile end during piling, extending its service life. Furthermore, the protective plate is connected to the sheet pile via a bolted connection, facilitating easy disassembly and replacement. When the protective plate needs replacement, it allows for quick and convenient operation. Additionally, this device eliminates the need for welding, employing a bolted connection that prevents heat deformation and minimizes damage to the sheet pile's structure.

[0023] 2. The short pipe and water jet nozzle designed in the connector device of this invention are used as a connecting joint. When using it, the short pipe and water jet nozzle are pre-installed on the surface of the node plate. When installing the node plate and the protective plate later, the water jet structure can be installed at the same time; or the protective plate and the node plate can be installed first, and then the short pipe and water jet nozzle can be installed later. The whole process is time-saving and labor-saving. The integrated modular design is easy to disassemble and assemble, and can be flexibly disassembled and used according to the actual working conditions.

[0024] 3. The detachable support in this invention can be detachably connected to the sheet pile and can move along the length of the sheet pile for position adjustment. The support mainly adopts a structure of support plate, side plate, guide rod, and movable plate. The movable plate can slide along the guide rod, and the movable plate is connected to the side plate by a third bolt. In use, simply tightening the third nut allows the movable plate to move towards the rolled edge of the sheet pile, thus pressing the movable plate tightly against the rolled edge of the sheet pile, completing the fixed connection between the support and the sheet pile. After installation, the support can be used as a support point for the water inlet pipe without the need for direct welding, facilitating subsequent dismantling, preserving the original state of the sheet pile, reducing damage to the sheet pile structure caused by welding, and also facilitating the reuse of the sheet pile.

[0025] 4. In this invention, by designing a joint device and a detachable support component that works in conjunction with the joint device, there are no weld points on the sheet pile during use, which helps to maintain the original shape of the sheet pile, reduces damage to the sheet pile's structure caused by welding and other factors, and the configured structure does not hinder the construction of the sheet pile. The structure is reasonable and highly practical. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a front view of the invention after it has been connected to the steel sheet pile.

[0028] Figure 2 yes Figure 1 A magnified schematic diagram of the structure of the device.

[0029] Figure 3 This is a schematic diagram of the node plate structure.

[0030] Figure 4 This is a side view showing the connection relationship between the node plate and the protection plate.

[0031] Figure 5 This is a schematic diagram of the pipe clamp structure.

[0032] Figure 6 This is a schematic diagram of the support components and sheet piles along the AA direction.

[0033] Figure 7 This is an enlarged schematic diagram of the structure of region C.

[0034] Figure 8 This is a schematic diagram of the movable plate structure.

[0035] Figure 9 This is a schematic diagram of another embodiment of the support component.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Sheet pile; 2. Protective plate; 201. Positioning bayonet; 3. Node plate; 301. Second through hole; 302. Threaded hole; 4. Water jet nozzle; 5. Short pipe; 6. Hose; 7. Pipe clamp; 8. First bolt; 9. Second bolt; 10. Support; 101. Support plate; 102. Side plate; 103. Guide rod; 104. Moving plate; 1041. Sliding hole; 1042. Slot; 105. Third bolt; 11. Reinforcing rib. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] Example 1

[0040] like Figure 1-5 As shown in the figure, this embodiment proposes a water jet installation structure for steel sheet piles, including a joint device and a detachable support component used in conjunction with the joint device. The joint device is installed at the bottom end of the steel sheet pile, and the detachable support component is installed near the top of the steel sheet pile. These two structural components are described in detail below:

[0041] The joint device includes a protective plate 2, which is connected to the bottom end of the sheet pile 1 along the length of the sheet pile 1, thus protecting the end of the sheet pile 1 and extending its service life. The sheet pile 1 and the protective plate 2 are connected by a node plate 3, one end of which is fixedly connected to the upper surface of the protective plate 2. In this embodiment, the fixed connection can be bolted or welded, and the other end of the node plate 3 is bolted to the sheet pile 1. A short pipe 5 is connected to the upper surface of the node plate 3, and a water jet nozzle 44 is connected to the bottom end of the short pipe 5. The short pipe 5 is a seamless steel pipe, and its structure is either "I"-shaped or T-shaped.

[0042] The specific bolting method between node plate 3 and sheet pile 1 is as follows:

[0043] The sheet pile 1 has a first through hole, and the node plate 3 has a second through hole 301 corresponding to the position of the first through hole. A first bolt 8 is inserted through the first through hole and the second through hole 301, and a first nut is fitted onto the first bolt 8. By locking the first bolt 8 and the first nut together, a fixed connection between the sheet pile 1 and the node plate 3 can be achieved. In this embodiment, the first bolt 8 is a high-strength bolt.

[0044] The sheet pile 1 includes a web and flanges, and the flanges have rolled edges. In this embodiment, the protective plate 2 can be a rectangular plate structure, the width of which can be slightly smaller than the width of the web of the sheet pile 1, and the length of which can be 30cm.

[0045] As another alternative, the protective plate 2 is a plate structure with the same cross-sectional shape as the sheet pile 1, and its length can be 30-50cm.

[0046] In this embodiment, the thickness of the protective plate 2 is the same as the wall thickness of the sheet pile 1. That is, the thickness of the web of the protective plate 2 is consistent with that of the sheet pile 1.

[0047] In this embodiment, the short pipe 5 can be connected to the surface of the node plate 3 by welding or bolting; in this embodiment, bolting is preferred for easy assembly and disassembly; specifically, the node plate 3 has multiple sets of threaded holes 302; it also includes pipe clamps 7 for fixing the short pipe 5, which are connected to the threaded holes 302 by second bolts 9. The pipe clamps 7 are stainless steel saddle clamps, and their structure is shown in the attached figure. Figure 5 .

[0048] In this embodiment, the node plate 3 and the protective plate 2 are arranged in staggered layers. A positioning slot 201 is formed between the node plate 3 and the protective plate 2. When the bottom end of the sheet pile 1 is positioned and engaged at the positioning slot 201, the centers of the first through hole and the second through hole 301 are on the same straight line in the X-axis direction. During installation, the alignment of the first through hole and the second through hole 301 can be easily achieved by simply sliding and adjusting along the X-axis.

[0049] Specific installation method for this device:

[0050] The protective plate 2 and the node plate 3 are prefabricated and welded together to form a whole. After welding, a positioning slot 201 is formed. The whole formed by the two is installed to the end of the steel sheet pile 1. During installation, the end of the steel sheet pile 1 is first clamped into the positioning slot 201, and then slid left and right to adjust it so that the first through hole and the second through hole 301 are completely aligned. Then, the first bolt 8 is inserted and the second nut is tightened to complete the fixed connection with the steel sheet pile 1. The water jet nozzle 4 is pre-installed at the outlet of the short pipe 5. The whole formed by the two is placed on the node plate 3, the pipe clamp 7 is installed, and the second bolt 9 is tightened to complete the fixation of the short pipe 5.

[0051] It should be noted that, in the above process, the protective plate 2 and the node plate 3 can be welded together to form a whole first, and then the short pipe 5 and the water jet nozzle 4 can be installed. Finally, the whole formed by the node plate 3, the protective plate 2 and the water jet structure can be installed to the end of the sheet pile 1.

[0052] As can be seen from the above description:

[0053] In this design, a protective plate 2 is installed at the end of the sheet pile 1. During piling, the protective plate 2 effectively protects the end of the sheet pile 1, extending its service life. Furthermore, the protective plate 2 is connected to the sheet pile 1 via a bolted connection 3, facilitating disassembly and replacement. When the protective plate 2 needs replacement, it allows for quick and convenient operation. In addition, this device eliminates the need for welding and uses a bolted connection, preventing heat deformation and minimizing damage to the sheet pile 1's structure.

[0054] The short pipe 5 and water jet nozzle 4 designed in this scheme are used as connecting joints. When using them, the short pipe 5 and water jet nozzle 4 are pre-integrated and installed on the surface of the node plate 3. When installing the node plate 3 and the protective plate 2 later, the water jet structure can be installed at the same time; or the protective plate 2 and the node plate 3 can be installed first, and then the short pipe 5 and water jet nozzle 4 can be installed later. The whole process is time-saving and labor-saving. The integrated modular design is easy to disassemble and assemble, and can be flexibly disassembled and used according to the actual working conditions.

[0055] like Figure 6-8 As shown in the above embodiments, the short pipe 5 is used as a connector. During use, it needs to be connected to a high-pressure pump via a hose 6. The hose 6 can be a wire-wound rubber hose or a wire-braided high-pressure hose. The hose 6 is laid along the length of the sheet pile 1 and needs to be fixed to the sheet pile 1. Currently, the common method is to directly weld a cross brace onto the sheet pile 1. This cross brace is used to support and fix the hose 6. Welding is inconvenient for subsequent disassembly, and the high temperature generated during welding can easily cause deformation of the sheet pile 1. Therefore, the applicant believes it is necessary to improve this part so that there are no weld points on the structure of the sheet pile 1 itself. Therefore, the aforementioned detachable support 10 is proposed, which includes a support plate 101. Both ends of the support plate 101 are connected to side plates 102 for fastening to the rolled edge of the sheet pile 1. The side plates 102 are arranged in an "L" shape. The side plates 102 are adapted to the rolled edge size of the sheet pile 1. The side plates 102 are connected to a guide rod 103. A movable plate 104 for pressing against the rolled edge edge of the sheet pile 1 is slidably connected to the guide rod 103. The movable plate 104 can slide along the guide rod 103. A third bolt 105 is fixedly connected to the movable plate 104. The other end of the third bolt 105 freely passes through the side plate 102 and is connected to a third nut.

[0056] In this embodiment, the support plate 101 is U-shaped; a gap is left between the support plate 101 and the web of the sheet pile 1, as detailed in [link to documentation]. Figure 6 Region B in the middle; this spacing allows the hose 6 to pass through, which can serve as a limit, so that the hose 6 can be set tightly against the web of the sheet pile 1.

[0057] As a preferred embodiment, the movable plate 104 has a slot 1042 for engaging with the edge of the sheet pile 1 coil. This slot 1042 serves to engage, thereby improving the stability of the connection.

[0058] like Figure 9 As shown, as a preferred embodiment, the support plate 101 may be connected with reinforcing ribs 11 to ensure overall strength.

[0059] It should be noted that the guide rod 103 can be a square rod, and the movable plate 104 has a sliding hole 1041 for the square rod to pass through. The sliding hole 1041 is a square hole. The square rod ensures that the movable plate 104 can only slide along the guide rod 103.

[0060] The third bolt, 105, is a high-strength bolt to ensure overall strength.

[0061] The specific installation method is as follows:

[0062] In use, a sliding installation method is adopted, starting from the top of the sheet pile 1. The movable plate 104 is inserted into the gap between the rolled edge and the flange plate, and then slid along the length of the sheet pile 1, leaving a certain distance between the support member 10 and the top of the sheet pile 1. This distance is to reserve clamping space for subsequent piling. After the support member 10 is adjusted to the appropriate position, the third nut on the third bolt 105 is tightened, so that the movable plate 104 is tightly pressed against the edge of the rolled edge, completing the fixation of the support member 10 and the sheet pile 1. After fixation, the hose 6 is temporarily fixed to the support member 10. The temporary fixation can be done by binding with steel wire or rope. Because the sheet piles 1 are interlocked through the rolled edges, after the first sheet pile 1 is driven, the support member 10 needs to be removed in time so as not to hinder the construction of the second sheet pile 1; similarly, the other sheet piles 1 are constructed in the same way. In this way, the support member 10 can also be reused repeatedly.

[0063] The support member 10 proposed in this solution is detachably connected to the sheet pile 1 and can move along the length of the sheet pile 1 for position adjustment. The support member 10 mainly adopts a structure of support plate 101, side plate 102, guide rod 103, and movable plate 104. The movable plate 104 can slide along the guide rod 103, and the movable plate 104 is connected to the side plate 102 by a third bolt 105. During use, simply tightening the third nut allows the movable plate 104 to move towards the rolled edge of the sheet pile 1, thus pressing the movable plate 104 tightly against the rolled edge of the sheet pile 1, completing the fixed connection between the support member 10 and the sheet pile 1. After installation, the support member 10 can be used as a support point for the water inlet pipe, eliminating the need for direct welding, facilitating subsequent dismantling, preserving the original state of the sheet pile 1, reducing damage to the sheet pile 1's structure caused by welding, and also facilitating the reuse of the sheet pile 1.

[0064] This invention also proposes an installation method for a steel sheet pile water jet installation structure, comprising the following steps:

[0065] A. Install a joint device at the bottom end of the steel sheet pile;

[0066] A1. The protective plate and the node plate are prefabricated and welded together to form a whole. The whole is placed at the end of the sheet pile and the sheet pile is bolted to the node plate.

[0067] A2. Install the water jet nozzle to the outlet of the short connector in advance, and install the two together onto the node plate to complete the fixation of the short connector;

[0068] B. Connect the hose to the inlet of the short pipe;

[0069] C. Install detachable connectors near the top of the sheet pile;

[0070] C1. The installation method of sliding from the top of the sheet pile is adopted. The movable plate is inserted into the gap between the rolled edge and the flange plate. Then the support is slid along the length of the sheet pile. After the support plate slides to the appropriate position, the third nut on the third bolt is tightened so that the movable plate is tightly pressed against the edge of the rolled edge, thus completing the fixation of the support and the sheet pile.

[0071] D. Temporarily fix the hose to the support plate.

[0072] In this invention, by designing a joint device and a detachable support component that works in conjunction with the joint device, there are no weld points on the sheet pile during use, which helps to maintain the original shape of the sheet pile, reduces damage to the sheet pile's structure caused by welding and other factors, and the configured structure does not hinder the construction of the sheet pile. The structure is reasonable and highly practical.

[0073] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method of installing a steel sheet pile water jet installation structure including a joint device, characterized by, The joint device comprises a protection plate abutting against the bottom end of the steel sheet pile along the length direction of the steel sheet pile; the steel sheet pile and the protection plate are connected through a node plate, one end of the node plate is fixedly connected to the upper surface of the protection plate, and the other end of the node plate is bolted to the steel sheet pile; a short connecting pipe is connected to the upper surface of the node plate, and a water jet nozzle is connected to the bottom end of the short connecting pipe; a hose is communicated with the top end of the short connecting pipe; further comprising a detachable support for supporting and fixing the hose, the detachable support comprises a support plate, both ends of the support plate are connected with edge plates for buckling at the curled edges of the steel sheet pile, and the edge plates are arranged in an "L" shape; the edge plates are connected with guide rods, the guide rods are slidably connected with moving plates for extruding at the edges of the curled edges of the steel sheet pile, the moving plates are fixedly connected with third bolts, and the other ends of the third bolts are freely penetrated through the edge plates and connected with third nuts; The steel sheet pile is provided with a first through hole, and the node plate is provided with a second through hole corresponding to the position of the through hole; the first through hole and the second through hole are connected with a first bolt penetrating therefrom, and the first bolt is connected with a first nut in a matched mode; A plurality of threaded holes are formed in the node plate; further comprising a pipe clamp for fixing the short connecting pipe, the pipe clamp is connected with the threaded holes through a second bolt; The node plate and the protection plate are arranged in a layered and staggered mode; a positioning bayonet is formed between the node plate and the protection plate, and when the bottom end of the steel sheet pile is positioned and clamped in the positioning bayonet, the centers of the first through hole and the second through hole are located on the same straight line in the X-axis direction; The support plate is in a "U" shape; a spacing is left between the support plate and the web of the steel sheet pile; The method comprises the following steps: installing the joint device at the bottom end of the steel sheet pile; A1, the protection plate and the node plate are processed and manufactured in advance, and the protection plate and the node plate are welded to form an integral whole, and the integral whole formed by the two is arranged at the end of the steel sheet pile, and the steel sheet pile and the node plate are bolted and fixed; A2, the water jet nozzle is installed at the water outlet of the short connecting pipe in advance, and the integral whole formed by the two is installed on the node plate to complete the fixation of the short connecting pipe; B, the hose is connected to the water inlet of the short connecting pipe; C, the detachable connecting piece is installed at the position close to the top end of the steel sheet pile; C1, the installation mode of sleeving the moving plate in the gap between the curled edge and the flange plate from the top of the steel sheet pile is adopted, the moving plate is inserted into the gap, then the support is slid along the length direction of the steel sheet pile, after the support plate is slid to the appropriate position, the third nut on the third bolt is screwed to tightly extrude the moving plate on the curled edge edge, and the fixation of the support and the steel sheet pile is completed; D, the hose and the support plate are temporarily fixed and connected.

2. The installation method of a steel sheet pile water jet installation structure according to claim 1, characterized by, The thickness of the protection plate is the same as the wall thickness of the steel sheet pile.

3. The installation method of a steel sheet pile water jet installation structure according to claim 1, characterized by, The moving plate is provided with a notch for clamping the curled edge of the steel sheet pile.

4. The installation method of a steel sheet pile water jet installation structure according to claim 1, characterized by, The support plate is connected with a reinforcing rib.

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