Laser cutting system for steel sheet pile and construction method

Abstract

The invention relates to the technical field of wharf reconstruction, and provides a laser cutting system for a steel sheet pile and a construction method.The laser cutting system for the steel sheet pile comprises a breast board, the breast board is used for being connected with the side face of the to-be-dismantled steel sheet pile, and the breast board and the steel sheet pile can define a first working area; the vertical support is arranged in the first working area, and one side of the vertical support is used for being connected with the side face of the steel sheet pile; the movable platform is movably connected with the vertical support, and the position of the movable platform in the length direction of the vertical support is adjustable; and the cutting equipment is connected with the movable platform, and the cutting equipment comprises a laser cutting device and an air blowing device. The technical problems that in the prior art, when the steel sheet pile is dismantled, a hoisting equipment overall pulling-out mode is adopted, the sum of the dead weight of the steel sheet pile and the side friction resistance of the steel sheet pile and the soil body needs to be overcome, and the hoisting capacity is prone to being insufficient or even the hoisting equipment is damaged can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dock reconstruction, and in particular to a laser cutting system and a construction method for steel sheet piles. Background Art

[0002] In order to achieve the purposes of support, soil retaining, waterproofing, etc., some docks will install steel sheet piles on the waterside. The bottom of the steel sheet piles is driven into the soil, and a concrete breast wall is cast on the top of the steel sheet piles. In order to ensure structural stability, the steel sheet piles often have a considerable depth, often penetrating into the hard soil layer and below, with a depth of more than 20m, and some even more than 40m. Therefore, the dock steel sheet piles are often also quite heavy.

[0003] Sometimes, for the needs of subsequent construction or new projects, these steel sheet piles need to be removed. However, as mentioned above, most of the steel sheet pile structure is located underground or underwater, and commonly used demolition equipment, such as crushers and excavators, can only work on the ground and cannot go deep underground. Therefore, it is difficult to remove these steel sheet piles. The existing demolition method is often to use lifting equipment to pull the steel sheet piles out of the soil as a whole.

[0004] However, since the steel sheet piles and the lateral connection structures between them will rub against the surrounding soil, this demolition method requires the lifting capacity of the lifting equipment to be at least greater than the weight of the steel sheet piles and the sum of the lateral friction between the steel sheet piles and the soil. It can often only be used to remove steel sheet piles of smaller size or shallower depth. If used for the removal of steel sheet piles at the dock, it is easy for the steel sheet piles to be unable to be pulled out or even the lifting equipment to be damaged. Therefore, it is necessary to develop a new solution for the removal of dock steel sheet piles. Summary of the invention

[0005] The purpose of the present invention is to overcome the existing technology of using lifting equipment to pull out the steel sheet piles as a whole when dismantling them. It is necessary to overcome the self-weight of the steel sheet piles and the sum of the side friction between the steel sheet piles and the soil. It is easy to have insufficient lifting capacity or even damage to the lifting equipment. A laser cutting system and construction method for steel sheet piles are provided.

[0006] In a first aspect, the present invention provides a laser cutting system for steel sheet piles, comprising:

[0007] A retaining plate, which is used to be connected to the side of the steel sheet piles to be removed, and the retaining plate and the steel sheet piles can enclose a first working area;

[0008] A vertical bracket, the vertical bracket is arranged in the first working area, and one side of the vertical bracket is used to connect with the side of the steel sheet pile;

[0009] A movable platform, the movable platform is movably connected to the vertical support, and the position of the movable platform along the length direction of the vertical support is adjustable;

[0010] The cutting equipment is connected to the movable platform. The cutting equipment includes a laser cutting device and an air blowing device. The cutting head of the laser cutting device faces the side of the vertical bracket for connecting with the steel sheet pile, and the nozzle of the air blowing device faces the front of the cutting head.

[0011] The laser cutting system for steel sheet piles of this scheme includes a retaining plate. During construction, the retaining plate is first driven into the ground and connected to the side wall of the steel sheet pile to be removed, so that a first working area can be enclosed between the retaining plate and the steel sheet pile. After the mud and sand in the first working area are removed, the mud and sand outside the first working area will be blocked by the retaining plate and the steel sheet pile, and thus cannot re-enter the first working area; a vertical bracket is then set in the first working area, so that the movable platform can move freely along the length direction of the vertical bracket without interference from the soil, thereby driving the cutting equipment to move along the length direction of the vertical bracket; at this time, starting the laser cutting device can cut the steel sheet pile along the way, and the blowing device can blow away water, residual mud and sand and other debris in front of the cutting head, thereby creating a small cavity between the cutting head and the steel sheet pile, thereby ensuring that the laser cutting device can operate normally and efficiently.

[0012] As mentioned above, this solution can enclose a first working area for installing vertical supports through retaining plates and steel sheet piles. Since the surrounding soil cannot enter the first working area, the movable platform can move freely along the length direction of the vertical support, thereby driving the cutting equipment to move together and cut the steel sheet piles along the way, so that the steel sheet piles are divided into at least two sections. The size and weight of a single section are smaller than the steel sheet piles before cutting, so it also has a smaller dead weight and smaller side friction, which can reduce the lifting capacity required for each lifting operation, greatly reduce the difficulty of pulling out the steel sheet piles, and reduce the risk of damage to the lifting equipment.

[0013] Preferably, the laser cutting device is movably connected to the movable platform, and the position of the laser cutting device is adjustable along a direction perpendicular to the length of the vertical support, so that the cutting head can be close to or away from the steel sheet pile.

[0014] The cutting effect of the laser cutting device will be affected by the distance between the cutting head and the steel sheet piles. If the length direction of the vertical bracket has an angle with the side wall of the steel sheet pile, the distance between the cutting head and the steel sheet pile will change with the movement of the movable platform, which will have a negative impact on the cutting effect. Therefore, this solution makes the position of the laser cutting device relative to the movable platform adjustable, so as to compensate for the possible distance changes between the cutting head and the steel sheet piles and maintain the distance between the cutting head and the steel sheet piles in the optimal range.

[0015] Preferably, an elastic element is provided between the laser cutting device and the movable platform, and the elastic element is used to drive the laser cutting device to approach the steel sheet pile.

[0016] This solution recommends a specific cutting head position adjustment method, which can prevent the cutting head from moving away from the steel sheet pile without electronic components, which can not only reduce the manufacturing cost of this solution, but also reduce the risk of electrical failure of electronic components underwater.

[0017] Preferably, a magnetic device is connected to the vertical bracket, and / or a magnetic device is connected to the retaining plate, and the magnetic device is used to connect to the steel sheet piles.

[0018] This solution recommends the connection method between the vertical support and the steel sheet piles, and between the retaining plate and the steel sheet piles. The magnetic suction device can be directly adsorbed to the side wall of the steel sheet pile without the need for underwater operations such as underwater drilling and underwater welding, thereby improving the installation efficiency of the vertical support and the retaining plate, and reducing the cost and safety risks of the installation operation.

[0019] Preferably, the cross-section of the retaining plate is an arc shape.

[0020] This plan recommends the specific shape of the retaining board. On the one hand, the arc-shaped retaining board can form an arched force-bearing structure together with the steel sheet piles, so as to better resist the load of the surrounding soil and reduce the possibility of the retaining board tipping over under the action of the surrounding soil; on the other hand, its smooth shape is also conducive to easier driving of the retaining board into the ground and reducing the residual mud and sand in the mud and sand removal operation, thereby reducing the interference of the residual mud and sand on the subsequent cutting operation.

[0021] Preferably, a rack is provided on the vertical support, and a gear is provided on the movable platform. The gear is meshed with the rack, and the rotation of the gear can drive the movable platform to move along the length direction of the vertical support.

[0022] This solution recommends one specific method of adjusting the position of the movable platform.

[0023] Preferably, the vertical support includes at least two sections, the sections are distributed along the length direction of the vertical support, and two adjacent sections are detachably connected.

[0024] Since the steel sheet piles at the wharf often have a large depth, if the steel sheet piles are to be cut, the vertical brackets also need to have a corresponding depth. If an integral vertical bracket is used, the manufacture, transportation and installation of the vertical bracket will be extremely difficult. Therefore, this plan recommends that the vertical bracket adopt a segmented structure to reduce the difficulty of manufacturing, transportation and installation of the vertical bracket.

[0025] In a second aspect, the present invention provides a laser cutting steel sheet pile construction method, which is applied to a laser cutting system for steel sheet piles of the present invention, comprising the following steps:

[0026] S1. Insert a retaining plate to a specified depth on one side of the steel sheet pile to be removed, connect the retaining plate to the side wall of the steel sheet pile, and remove mud and sand in the first working area enclosed by the retaining plate and the steel sheet pile;

[0027] S2, placing the vertical support into the first working area, and connecting the vertical support to the side wall of the steel sheet pile;

[0028] S3. Adjust the position of the movable platform along the vertical support, start the air blowing device to create a cavity between the cutting head and the steel sheet pile, and start the laser cutting device to cut the steel sheet pile until the cutting operation of the predetermined area is completed.

[0029] The laser cutting steel sheet pile construction method of this scheme is applicable to the laser cutting system for steel sheet piles of the present invention. A first working area for installing a vertical bracket is enclosed by retaining plates and steel sheet piles, and mud and sand in the first working area are cleared, so that the movable platform can move freely along the length direction of the vertical bracket and penetrate deep into the ground without interference from the soil, thereby driving the cutting equipment to move together and divide the steel sheet pile into at least two sections. The size and weight of a single section are smaller than the steel sheet pile before cutting, so it also has a smaller dead weight and smaller side friction, which can reduce the lifting capacity required for each lifting operation, greatly reduce the difficulty of pulling out the steel sheet piles, and reduce the risk of damage to the lifting equipment.

[0030] Preferably, the retaining plate is connected to the side of the steel sheet pile facing the water.

[0031] The elevation of the top surface of the soil on the water side of the wharf steel sheet piles is lower than the elevation of the top surface of the soil on the other side of the steel sheet piles. Therefore, this plan recommends setting the retaining plate on the water side of the steel sheet piles, which can reduce the difficulty of driving the retaining plate into the ground.

[0032] Preferably, when the laser cutting device is movably connected to the movable platform, the distance between the cutting head and the steel sheet pile is maintained less than or equal to 2 cm in step S3.

[0033] This solution recommends a specific working range for the distance between the cutting head and the steel sheet pile, which can ensure efficient and stable operation of the laser cutting device.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention provides a laser cutting system for steel sheet piles, which encloses a first working area for installing a vertical support through retaining plates and steel sheet piles. Since the surrounding soil cannot enter the first working area, the movable platform can move freely along the length direction of the vertical support, thereby driving the cutting equipment to move together and cut the steel sheet piles along the way, so that the steel sheet piles are divided into at least two sections. The size and weight of a single section are smaller than the steel sheet piles before cutting, so it also has a smaller dead weight and smaller lateral friction, which can reduce the lifting capacity required for each lifting operation, greatly reduce the difficulty of pulling out the steel sheet piles, and reduce the risk of damage to the lifting equipment.

[0036] 2. The present invention provides a laser cutting steel sheet pile construction method, in which a first working area for installing a vertical support is enclosed by retaining plates and steel sheet piles, and mud and sand in the first working area are removed, so that a movable platform can move freely along the length direction of the vertical support and penetrate deep into the ground without interference from the soil, thereby driving the cutting equipment to move together and divide the steel sheet pile into at least two sections. The size and weight of a single section are smaller than the steel sheet pile before cutting, so it also has a smaller dead weight and smaller lateral friction, which can reduce the lifting capacity required for each lifting operation, greatly reduce the difficulty of pulling out the steel sheet piles, and reduce the risk of damage to the lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the top view of the structure of a laser cutting system for steel sheet piles of the present invention;

[0038] Figure 2 yes Figure 1 The schematic diagram of the local enlarged structure at position Ⅰ in the middle;

[0039] Figure 3 It is a side structural schematic diagram of a laser cutting system for steel sheet piles of the present invention;

[0040] Figure 4 It is a partial three-dimensional structural schematic diagram of a laser cutting system for steel sheet piles of the present invention;

[0041] Figure 5 yes Figure 4 The schematic diagram of the local enlarged structure at the middle II;

[0042] Icons: 1- steel sheet pile; 2- soil; 3- retaining board; 4- vertical support; 5- movable platform; 6- cutting equipment; 7- magnetic device; 31- first working area; 41- slide rail; 42- rack; 51- gear; 52- driving motor; 61- cutting head. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0044] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0045] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0046] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0047] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0048] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0049] Example 1

[0050] like Figures 1 to 5 As shown, a laser cutting system for steel sheet piles includes a retaining plate 3, a vertical bracket 4, a movable platform 5 and a cutting device 6; the retaining plate 3 is used to connect with the side of the steel sheet pile 1 to be removed, and the retaining plate 3 and the steel sheet pile 1 can enclose a first working area 31; the vertical bracket 4 is arranged in the first working area 31, and one side of the vertical bracket 4 is used to connect with the side of the steel sheet pile 1; the movable platform 5 is movably connected to the vertical bracket 4, and the position of the movable platform 5 along the length direction of the vertical bracket 4 is adjustable; the cutting device 6 is connected to the movable platform 5, and the cutting device 6 includes a laser cutting device and a blowing device, the cutting head 61 of the laser cutting device is facing the side of the vertical bracket 4 for connecting with the steel sheet pile 1, and the nozzle of the blowing device is facing the front of the cutting head 61.

[0051] It should be noted that Figure 1 and Figure 2 It is not a cross-sectional view, but a top-down view with a perspective effect, that is, the effect of the distance being small and the near being large. Figure 1 , Figure 3 and Figure 4 In the figure, arrow Z represents the plumb bob direction, arrow X and arrow Y represent two directions parallel to the horizontal plane and perpendicular to each other; in front of the cutting head 61, Figure 1 For example, the cutting head 61 is directed toward one side of the steel sheet pile 1, that is, Figure 1 The right side of the middle cutting head 61.

[0052] In an optional embodiment, the retaining plate 3 can enclose a first working area 31 together with the steel sheet piles 1, and is used to prevent the surrounding soil 2 from entering the range of the vertical support 4 and the movable platform 5. Its specific shape includes but is not limited to square groove shape, V-shape, broken line shape, semicircular arc shape, etc., so as to form a columnar first working area 31 with rectangular, triangular, polygonal and semicircular cross-sections respectively; but the retaining plate 3 does not need to prevent water from entering the first working area 31, that is, the connection between the retaining plate 3 and the steel sheet piles 1 can be sealed to further optimize the working environment in the first working area 31, or it can be unsealed; and the retaining plate 3 can be either an integrated structure or a combined structure.

[0053] In an optional implementation manner, the cross-sectional shape of the retaining plate 3 is an arc shape, such as a semi-circular arc shape, a 2 / 3 circular arc shape, a 2 / 5 circular arc shape, a semi-elliptical shape, etc.

[0054] In an optional implementation manner, the retaining plate 3 is a metal component, such as stainless steel, 45 steel, or Q235 steel, to ensure the bearing capacity of the retaining plate 3 .

[0055] In an optional embodiment, the vertical bracket 4 is used to support the movable platform 5, and its specific structure includes but is not limited to a columnar or axial structure, a truss structure, a cylindrical structure, etc.; and the specific movable connection method between the movable platform 5 and the vertical bracket 4 includes but is not limited to setting a slide rail and slider mechanism, a gear rack mechanism, a screw mechanism between the movable platform 5 and the vertical bracket 4, or directly making the movable platform 5 and the vertical bracket 4 fit in clearance, for example Figure 2 As shown, a slide rail 41 is provided on the vertical bracket 4 , and the movable platform 5 is slidably connected to the slide rail 41 .

[0056] In an optional implementation, the laser cutting device can be purchased as an existing mature product.

[0057] In an optional embodiment, the laser cutting device is movably connected to the movable platform 5, and the position of the laser cutting device is adjustable along the length direction perpendicular to the vertical support 4, so that the cutting head 61 can be close to or away from the steel sheet pile 1. Figure 1 For example, the movable connection between the laser cutting device and the movable platform 5 should include at least one degree of freedom of movement along the direction indicated by arrow Y. The specific implementation method includes but is not limited to setting a slide rail slider mechanism, a gear rack mechanism, and a screw mechanism between the laser cutting device and the movable platform 5.

[0058] In an optional embodiment, an elastic element is provided between the laser cutting device and the movable platform 5, and the elastic element is used to drive the laser cutting device to approach the steel sheet pile 1; the elastic element includes but is not limited to a compression spring, a tension spring, and a rubber block. It should be noted that the elastic element is only used to prevent the cutting head 61 from being too far away from the steel sheet pile 1, but if there is a need to prevent the cutting head 61 from being too close to the steel sheet pile 1, other mechanisms need to be used, such as providing an active mechanism such as a servo motor or a telescopic rod between the laser cutting device and the movable platform 5 to actively control the distance between the cutting head 61 and the steel sheet pile 1; or a limiting structure is connected to the side of the laser cutting device facing the steel sheet pile 1, and the distance between the end of the limiting structure away from the laser cutting device and the steel sheet pile 1 is less than the distance between the cutting head 61 and the steel sheet pile 1, and the specific distance is determined according to the working requirements of the cutting head 61, for example, if the distance between the cutting head 61 and the steel sheet pile 1 is to be greater than or equal to 0.5 cm, the limiting structure can be made at least 0.5 cm closer to the steel sheet pile 1 than the cutting head 61; the specific form of the limiting structure includes but is not limited to a rod-shaped member, a block-shaped member, and a plate-shaped member.

[0059] In an optional embodiment, the nozzle of the blowing device may be one or more; when the number of the nozzles is one, the nozzle may be set on one side of the cutting head 61; when the number of the nozzles is two or more, the nozzles may be arranged symmetrically around the cutting head 61, thereby forming a circle of air curtain around the cutting head 61 after startup, thereby preventing surrounding water, mud, sand and other debris from interfering with the operation of the cutting head 61 to the greatest extent.

[0060] In an optional embodiment, the air source of the blowing device can be directly connected to the movable platform 5, or it can be set on the shore and connected to the nozzle through an air pipe; the air source pressure of the blowing device depends on the cutting water depth, for example, it is at least greater than the water pressure at the maximum cutting depth.

[0061] In an optional embodiment, the movable platform 5 is further connected to a sand pump for sucking out debris such as mud and sand remaining in the first working area 31 , so as to further prevent the debris from having a negative impact on the cutting operation of the cutting head 61 .

[0062] In an optional embodiment, if Figure 2 As shown, the vertical bracket 4 is connected with a magnetic device 7, and / or the retaining plate 3 is connected with a magnetic device 7, and the magnetic device 7 is used to connect the steel sheet pile 1. The magnetic device 7 includes but is not limited to an electromagnet and a permanent magnet.

[0063] In an optional embodiment, if Figure 5 As shown, a rack 42 is provided on the vertical bracket 4, and a gear 51 is provided on the movable platform 5. The gear 51 is meshed with the rack 42, and the gear 51 is connected to a driving motor 52. The driving motor 52 can drive the gear 51 to rotate, thereby driving the movable platform 5 to move along the length direction of the vertical bracket 4.

[0064] In an optional embodiment, the vertical bracket 4 includes at least two segments, which are distributed along the length direction of the vertical bracket 4, and two adjacent segments are detachably connected. The specific manner of detachable connection includes but is not limited to threaded connection, mortise and tenon connection, and fastener connection.

[0065] Example 2

[0066] A laser cutting steel sheet pile construction method, applied to a laser cutting system for steel sheet piles in Example 1, comprises the following steps:

[0067] S1. Insert the retaining plate 3 to a specified depth on one side of the steel sheet pile 1 to be removed by means of a crane and a vibrating hammer, and connect the retaining plate 3 to the side wall of the steel sheet pile 1, for example, by using a magnetic suction device 7 to connect the retaining plate 3 to the steel sheet pile 1; use a negative pressure suction device, a sand pump, an excavator and other equipment to remove mud and sand in the first working area 31 enclosed by the retaining plate 3 and the steel sheet pile 1.

[0068] In an optional embodiment, the retaining plate 3 is connected to the side of the steel sheet pile 1 facing the water.

[0069] In an optional embodiment, after clearing the mud and sand in the first working area 31, a high-pressure water gun is used to clean the side walls of the steel sheet piles 1 in the first working area 31 to prevent the dirt on the steel sheet piles 1 from having an adverse effect on the subsequent laser cutting. After the side walls of the steel sheet piles 1 are cleaned, the first working area 31 is cleaned again to minimize the debris in the first working area 31.

[0070] S2, put the vertical support 4 into the first working area 31. For example, if the vertical support 4 includes multiple sections, use a crane to sequentially lift each section into the first working area 31, and connect two adjacent sections to each other; and the length direction of the vertical support 4 is preferably parallel to the side wall of the steel sheet pile 1, that is, parallel to Figure 3 In the direction indicated by the middle arrow Z; connect the vertical bracket 4 to the side wall of the steel sheet pile 1, for example, use a magnetic suction device 7 to connect the vertical bracket 4 to the steel sheet pile 1.

[0071] S3, adjust the position of the movable platform 5 along the vertical bracket 4 so that the movable platform 5 Figure 3 It rises and falls in the direction indicated by the middle arrow Z, and starts the air blowing device to create a cavity between the cutting head 61 and the steel sheet pile 1, and starts the laser cutting device to cut the steel sheet pile 1 until the cutting operation of the predetermined area is completed, and the steel sheet pile 1 is cut into at least two segments.

[0072] In an optional embodiment, when the laser cutting device is movably connected to the movable platform 5, the distance between the cutting head 61 and the steel sheet pile 1 is kept less than or equal to 2 cm in step S3, for example, the distance between the cutting head 61 and the steel sheet pile 1 is controlled to be about 1 cm.

[0073] S4. Repeat steps S1 to S3 at different positions of the steel sheet pile 1 until all the predetermined cutting operations are completed, so that the sum of the deadweight and the lateral friction of the steel sheet pile 1 segment is less than the lifting capacity of the lifting equipment.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser cutting system for steel sheet piles, characterized in that: include: A retaining plate (3), the retaining plate (3) being used to be connected to the side of the steel sheet pile (1) to be removed, the retaining plate (3) and the steel sheet pile (1) being able to enclose a first working area (31); A vertical support (4), wherein the vertical support (4) is arranged in the first working area (31), and one side of the vertical support (4) is used to be connected to the side of the steel sheet pile (1); A movable platform (5), the movable platform (5) being movably connected to the vertical support (4), and the position of the movable platform (5) along the length direction of the vertical support (4) being adjustable; A cutting device (6), wherein the cutting device (6) is connected to the movable platform (5), and the cutting device (6) comprises a laser cutting device and an air blowing device, wherein the cutting head (61) of the laser cutting device faces a side of the vertical support (4) for connection with the steel sheet pile (1), and the nozzle of the air blowing device faces the front of the cutting head (61).

2. A laser cutting system for steel sheet piles according to claim 1, characterized in that: The laser cutting device is movably connected to the movable platform (5), and the position of the laser cutting device is adjustable along a direction perpendicular to the length of the vertical support (4), so that the cutting head (61) can be moved closer to or farther away from the steel sheet pile (1).

3. A laser cutting system for steel sheet piles according to claim 2, characterized in that: An elastic element is provided between the laser cutting device and the movable platform (5), and the elastic element is used to drive the laser cutting device to approach the steel sheet pile (1).

4. A laser cutting system for steel sheet piles according to any one of claims 1 to 3, characterized in that: The vertical support (4) is connected to a magnetic device (7), and / or the retaining plate (3) is connected to a magnetic device (7), and the magnetic device (7) is used to connect to the steel sheet pile (1).

5. A laser cutting system for steel sheet piles according to any one of claims 1 to 3, characterized in that: The cross-sectional shape of the retaining plate (3) is an arc shape.

6. A laser cutting system for steel sheet piles according to any one of claims 1 to 3, characterized in that: The vertical support (4) is provided with a rack (42), and the movable platform (5) is provided with a gear (51); the gear (51) is meshed with the rack (42); the rotation of the gear (51) can drive the movable platform (5) to move along the length direction of the vertical support (4).

7. A laser cutting system for steel sheet piles according to any one of claims 1 to 3, characterized in that: The vertical support (4) comprises at least two sections, the sections are distributed along the length direction of the vertical support (4), and two adjacent sections are detachably connected.

8. A laser cutting steel sheet pile construction method, characterized in that: A laser cutting system for steel sheet piles as claimed in any one of claims 1 to 7, comprising the following steps: S1. Inserting a retaining plate (3) to a specified depth on one side of the steel sheet pile (1) to be removed, connecting the retaining plate (3) to the side wall of the steel sheet pile (1), and removing mud and sand in a first working area (31) enclosed by the retaining plate (3) and the steel sheet pile (1); S2, placing a vertical support (4) into the first working area (31), and connecting the vertical support (4) to the side wall of the steel sheet pile (1); S3, adjusting the position of the movable platform (5) along the vertical support (4), starting the air blowing device to create a cavity between the cutting head (61) and the steel sheet pile (1), and starting the laser cutting device to cut the steel sheet pile (1) until the cutting operation of the predetermined area is completed.

9. A laser cutting steel sheet pile construction method according to claim 8, characterized in that: The retaining plate (3) is connected to the side of the steel sheet pile (1) facing the water.

10. A laser cutting steel sheet pile construction method according to claim 8, characterized in that: In step S3, the distance between the cutting head (61) and the steel sheet pile (1) is maintained to be less than or equal to 2 cm.

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