A steel sheet pile support device for the construction of a pier in water

Abstract

This application relates to a steel sheet pile support device for the construction of piers in water, belonging to the technical field of the construction of bridges in water. In order to solve the problem that it is inconvenient for construction workers to install the waling, resulting in a long installation period of the steel sheet pile support device, it includes a waling, and the waling is in the shape of a rectangular frame; a pulling plate is rotatably connected to the top wall of the waling, the width of the pulling plate is greater than the width of the waling frame, and the pulling plate is connected to one side of the top wall of the waling close to the inner side wall; the side of the pulling plate away from the connection point extends out from the outer side wall of the waling, and a plurality of hooks for connecting with the steel sheet piles are arranged on the side of the pulling plate away from the connection point; a limiting plate is arranged on the top wall of the waling, the limiting plate penetrates through the pulling plate, and a limiting head for limiting the pulling plate is arranged at the end of the limiting plate. This application has the effect of improving the installation speed of the steel sheet pile support device.

Description

Technical Field

[0001] This application relates to the technical field of underwater bridge construction, and in particular to a steel sheet pile support device for underwater pier construction. Background Art

[0002] An underwater pier refers to a support pile that is pre-cast underwater to support the shell when building a bridge over a river or lake.

[0003] In related technologies, when manufacturing an underwater pier, a cofferdam is pre-built underwater. The cofferdam includes several steel sheet piles. The length of the steel sheet pile is greater than the water depth. The lower end of the steel sheet pile is inserted into the river bottom by 8 - 10 meters, and the upper end of the steel sheet pile is 1 - 2 meters above the river surface; the steel sheet pile is trapezoidal and the lower bottom is open. Connecting hooks are integrally formed on both sides of the steel sheet pile. Adjacent steel sheet piles are arranged in opposite positions and adjacent connecting hooks are connected to each other; the steel sheet piles are sequentially connected along the width direction and surrounded into a rectangular shape to form a cofferdam, and the cofferdam is set in two circles; then a support device is arranged on the inner side wall of the inner cofferdam. The support device includes a waling beam and struts. The waling beam is in a frame shape. The outer side wall of the waling beam is welded to the inner side wall of the inner cofferdam, and then the struts are welded to the four corners of the inner side wall of the waling beam; then the water and river bottom sediment in the inner cofferdam can be pumped out, and a steel reinforcement frame is built and concrete is poured in the cofferdam to form an underwater pier.

[0004] In view of the above related technologies, when setting the support device in the cofferdam, construction workers need to perform welding operations at the installation location of the waling beam. The installation of the waling beam is a water surface construction, and the construction site is limited. It is inconvenient for construction workers to install the waling beam, resulting in a long installation period for the steel sheet pile support device. Summary of the Invention

[0005] In order to improve the installation speed of the steel sheet pile support device, this application provides a steel sheet pile support device for underwater pier construction.

[0006] A steel sheet pile support device for underwater pier construction provided by this application adopts the following technical solutions:

[0007] A steel sheet pile support device for underwater pier construction includes a waling beam, and the waling beam is in a rectangular frame shape; a pull plate is rotatably connected to the top wall of the waling beam. The width of the pull plate is greater than the width of the waling beam frame. The pull plate is connected to one side of the top wall of the waling beam close to the inner side wall; the side of the pull plate far from the connection point extends out from the outer side wall of the waling beam, and several hooks for connecting with the steel sheet pile are arranged on the side of the pull plate far from the connection point; a limiting plate is arranged on the top wall of the waling beam. The limiting plate penetrates the pull plate, and a limiting head for limiting the pull plate is arranged at the end of the limiting plate.

[0008] By adopting the above technical solution, when installing the purlin, first lift the purlin with a crane, lower it and insert it into the cofferdam; during the downward movement of the purlin, the pull plate on the purlin will contact the upper end of the cofferdam and rotate upward during the downward movement of the top frame. After the pull plate on the purlin rotates to be offset from the cofferdam, it moves down synchronously with the purlin; after the purlin moves further downward, the pull hook on the purlin will hook with the steel sheet piles that constitute the cofferdam, and the purlin will be fixed and hung in the cofferdam, so that the installation of the purlin can be realized. At the same time, the pull plate on the bottom frame rotates to counteract the limit head of the upper limit plate on the bottom frame, limiting the position of the pull plate, which can reduce the situation where the pull hook on the bottom frame and the corresponding pull ring are offset due to excessive rotation of the pull plate. The setting of the pull plate and the pull hook, as well as the coordination of the limit plate, the limit head and the pull plate, allow the purlin to be directly hoisted during installation. The downward movement of the purlin can drive the pull hook to connect with the steel sheet piles of the cofferdam, thereby reducing the construction process of welding the purlin by construction workers and improving the installation efficiency of the steel sheet pile support device.

[0009] Preferably, the outer side wall of the purlin is provided with a dovetail groove, into which a dovetail block pre-set on the inner side wall of the steel sheet pile is inserted, and the dovetail block is inserted into the dovetail groove and matched with the dovetail groove.

[0010] By adopting the above technical solution, when the purlin moves down and enters the cofferdam, the dovetail block is inserted into the corresponding dovetail groove. The dovetail block and the dovetail groove can cooperate to limit the position between the purlin and the steel sheet pile in the horizontal direction, thereby reducing the tilt and misalignment of the steel sheet pile between the purlin and the cofferdam in the horizontal direction under the action of external water pressure.

[0011] Preferably, at least two surrounding purlins are provided, and the surrounding purlins include a top frame and a bottom frame. The top frame is located at the uppermost end, and the hook of the top frame is used to hook with the upper end of the steel sheet pile; the hook of the top frame is located at the corresponding position where the top frame and the side wall of the steel sheet pile are attached, and the hook of the bottom frame is located on the side wall at the corresponding position of the top frame and the groove of the steel sheet pile; a plurality of pull rings pre-set in the groove of the steel sheet pile are provided on one side of the bottom frame, and the hooks of the bottom frame are respectively hooked with the corresponding pull rings.

[0012] Generally, two waling beams are provided. When installing the lower waling beam, it is necessary to make way for the hooks on the lower waling beam, so that the hooks on the lower waling beam are staggered from the upper end of the cofferdam, and the operation is rather inconvenient. By adopting the above technical solution, when installing the bottom frame, first lift the bottom frame with a crane and lower it into the cofferdam; in the next process of the bottom frame, the pull plate on the bottom frame contacts the upper end of the cofferdam and rotates upward during the downward movement of the bottom frame. After the pull plate on the bottom frame rotates to be staggered from the cofferdam, it moves downward synchronously with the bottom frame; the hook on the pull plate of the bottom frame enters the groove on the steel sheet pile and moves downward along the length direction of the groove. After the bottom frame drives its own hook to move to the position of the pull ring, with the movement of the bottom frame, the hook will be hooked to the pull ring, further fixing and suspending the bottom frame in the cofferdam. When installing the top frame, lift the top frame with a crane and lower it into the cofferdam; in the next process of the top frame, the pull plate on the top frame contacts the upper end of the cofferdam and rotates upward during the downward movement of the top frame. After the pull plate on the top frame rotates to be staggered from the cofferdam, it moves downward synchronously with the top frame; after the top frame moves further downward, the hook on the top frame will be hooked to the upper end of the steel sheet pile forming the cofferdam, and the installation of the top frame can be completed. The staggered arrangement of the hook positions of the top frame and the bottom frame, as well as the setting of the pull ring, enables the installation of the bottom frame without adjusting the position of the hook, making the installation of the bottom frame faster.

[0013] Preferably, a backing plate is arranged inside the hook of the top frame. The width of the backing plate is greater than the width of the hook of the top frame, and the backing plate is used to be attached to the outer side wall of the steel sheet pile.

[0014] By adopting the above technical solution, when the hook of the top frame is hooked to the upper end of the cofferdam, the backing plate is simultaneously attached to the side wall of the corresponding steel sheet pile. The backing plate can increase the contact area between the hook and the side wall of the corresponding steel sheet pile, reduce the pressure exerted by the hook on the side wall of the steel sheet pile, and reduce the deformation of the steel sheet pile under the action of the tensile force.

[0015] Preferably, a guide rod is arranged at the upper end of the dovetail block. The guide rod is inclined towards the outside of the waling beam, and the guide rod can be inserted into the dovetail groove.

[0016] By adopting the above technical solution, when the waling beam moves downward into the cofferdam, the waling beam first contacts the guide rod, and the guide rod is simultaneously inserted into the dovetail groove, so that the waling beam moves downward along the length direction of the guide rod, and gradually inserts the dovetail block into the dovetail groove, improving the accuracy of inserting the dovetail block into the dovetail groove.

[0017] Preferably, the guide rod is rotatably connected to the dovetail block, and a spring for pulling the guide rod and the dovetail block to be parallel is connected between the guide rod and the dovetail block.

[0018] By adopting the above technical solution, even if the waling beam shakes and pushes the guide rod to rotate and incline towards the outside of the waling beam, the spring can pull the guide rod to always be located in the dovetail groove, improving the stability of the guide rod guiding the waling beam.

[0019] Preferably, a receiving hole for inserting the spring is formed in the upper end wall of the dovetail block, and the lower end of the spring is fixedly connected to the bottom wall of the receiving hole.

[0020] Generally, an installation block needs to be provided on the dovetail block, and the guide rod is connected to the installation block to facilitate the installation space for the spring. However, the setting of the installation block will make the center of gravity of the guide rod relatively high, resulting in low installation stability of the guide rod. By adopting the above technical solution, the receiving hole provides an installation place for the spring, so that there is no need to set an installation space for the spring between the guide rod and the dovetail block. The guide rod can be attached to the end wall of the dovetail block, reducing the center of gravity of the guide rod and improving the installation stability of the guide rod.

[0021] Preferably, a plug-in plate is rotatably connected to the end of the guide rod. The plug-in plate is inserted into the dovetail block along the upper end wall of the dovetail block and is detachably connected to the dovetail block; the upper end of the spring is detachably connected to the guide rod.

[0022] By adopting the above technical solution, when installing the guide rod, move the plug-in plate into the end wall of the dovetail block. Use bolts to pass through the steel sheet pile and insert into the dovetail block and penetrate the plug-in plate at the same time. The bolts are threadedly connected to the dovetail block, so as to realize the connection between the guide rod and the dovetail block. Further, the detachable connection between the wire plate and the dovetail block can be realized. When the steel sheet pile is idle, the guide block can be removed, which is convenient for the storage and transportation of the steel sheet pile.

[0023] Preferably, a connection head is connected to the upper end of the spring. An installation head is rotatably connected to the end of the connection head. The installation head is inserted into the guide rod and is threadedly connected to the guide rod.

[0024] By adopting the above technical solution, move the installation head into the threaded hole pre-opened on the guide rod and screw the installation head to be threadedly connected to the guide rod to realize the connection with the guide rod; the rotational connection between the connection head and the installation head can reduce the situation that the installation diagram drives the spring to rotate synchronously.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The setting of the pull plate and the pull hook, and the cooperation of the limit plate, the limit head and the pull plate enable the direct hoisting during the installation of the waling. The downward movement of the waling can drive the pull hook to hook the steel sheet pile of the cofferdam, thus reducing the construction process of welding the waling by the construction personnel and improving the installation speed of the steel sheet pile support device.

[0027] 2. The staggered arrangement of the pull hook positions of the top frame and the bottom frame, and the setting of the pull ring enable the installation of the bottom frame without adjusting the position of the pull hook, making the installation of the bottom frame faster.

[0028] 3. The cooperation between the dovetail block and the dovetail groove can limit the position between the waling and the steel sheet pile in the horizontal direction, reducing the inclination and dislocation between the steel sheet pile and the waling in the horizontal direction under the action of external water pressure. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of a steel sheet pile support device for underwater pier construction in an embodiment of the present application.

[0030] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0031] Figure 3 It is a schematic cross-sectional view for showing the connection relationship between the guide rod and the dovetail block in an embodiment of the present application.

[0032] Figure 4 is Figure 3 an enlarged schematic view of part B in

[0033] Description of the reference numerals: 1, cofferdam; 11, steel sheet pile; 12, pull ring; 13, dovetail block; 131, receiving hole; 14, spring; 141, connection head; 142, mounting head; 15, guide rod; 151, plug-in board; 2, waling; 21, top frame; 22, bottom frame; 23, pull plate; 231, hook; 232, backing plate; 24, limiting plate; 241, limiting head; 25, dovetail groove. Detailed Description of the Embodiment

[0034] The following further describes the present application in detail Figures 1-4 in conjunction with the attached drawings.

[0035] An embodiment of the present application discloses a steel sheet pile support device for underwater pier construction. Referring to Figure 1 , the steel sheet pile support device for underwater pier construction includes a waling 2. The waling 2 is of a rectangular frame structure and is arranged inside the cofferdam 1. In the embodiment of the present application, two waling 2 are provided, including a top frame 21 and a bottom frame 22; the cofferdam 1 includes a plurality of steel sheet piles 11. The steel sheet piles 11 are trapezoidal and have an open bottom. Connection hooks are integrally formed on both sides of the steel sheet piles 11. Adjacent steel sheet piles 11 are arranged in opposite positions and adjacent connection hooks are connected to each other; the steel sheet piles 11 are sequentially connected along the width direction and enclose a rectangular shape, thus forming the cofferdam 1; since the cofferdam 1 is composed of a plurality of trapezoidal steel sheet piles 11, there are a plurality of grooves on the inner side wall of the cofferdam 1.

[0036] Referring to Figure 1 and Figure 2The top wall of the purlin 2 is rotatably connected with a pull plate 23, the pull plate 23 is connected to the side of the top wall of the purlin 2 close to the inner wall, and the side of the pull plate 23 away from the connection point extends from the outer wall of the purlin 2; a limit plate 24 is provided on the top wall of the purlin 2, the limit plate 24 is an arc-shaped plate, the limit plate 24 passes through the pull plate 23, and the end of the limit plate 24 is welded and connected to the limit head 241.

[0037] Reference Figure 2 The top frame 21 is located above the bottom frame 22. The hook 231 of the top frame 21 is used to hook with the upper end of the steel sheet pile 11. The hook 231 of the top frame 21 is located at the corresponding position where the top frame 21 and the side wall of the steel sheet pile 11 are attached; the hook 231 of the bottom frame 22 is located on the side wall of the top frame 21 at the corresponding position of the groove of the steel sheet pile 11. A pull ring 12 is welded in the groove of the steel sheet pile 11, and the hook 231 of the bottom frame 22 is hooked with the corresponding pull ring 12 respectively.

[0038] When installing the purlin 2, first lift the bottom frame 22 with a crane, lower it and insert it into the cofferdam 1; when the bottom frame 22 moves down, the pull plate 23 on the bottom frame 22 contacts the upper end of the cofferdam 1 and rotates upward during the bottom frame 22 moving down. After the pull plate 23 on the bottom frame 22 rotates to be offset from the cofferdam 1, it moves down synchronously with the bottom frame 22; the pull hook 231 of the pull plate 23 on the bottom frame 22 enters the groove on the steel sheet pile 11 and moves down along the length direction of the groove, and the bottom frame 22 moves down along the length direction of the groove. After the frame 22 drives its own hook 231 to move to the position of the pull ring 12, as the bottom frame 22 moves, the hook 231 will be hooked with the pull ring 12, further fixing the bottom frame 22 in the cofferdam 1; at the same time, the pull plate 23 on the bottom frame 22 rotates to abut against the limit head 241 of the upper limit plate 24 on the bottom frame 22, limiting the position of the pull plate 23, and reducing the situation where the pull hook 231 on the bottom frame 22 and the corresponding pull ring 12 are misaligned due to excessive rotation of the pull plate 23.

[0039] After installing the bottom frame 22, the top frame 21 is lifted by a crane and lowered into the cofferdam 1; during the lowering process of the top frame 21, the pull plate 23 on the top frame 21 contacts the upper end of the cofferdam 1 and rotates upward during the downward movement of the top frame 21. After the pull plate 23 on the top frame 21 rotates to be offset from the cofferdam 1, it moves downward synchronously with the top frame 21; after the top frame 21 moves further downward, the pull hook 231 on the top frame 21 will be hooked with the upper end of the steel sheet pile 11 constituting the cofferdam 1, and the top frame 21 is fixedly hung in the cofferdam 1, thereby realizing the installation of the cofferdam 2.

[0040] Reference Figure 2, a backing plate 232 is welded and connected inside the hook 231 of the top frame 21, and the width of the backing plate 232 is greater than the width of the hook 231 of the top frame 21; when the hook 231 of the top frame 21 is hooked to the upper end of the cofferdam 1, the backing plate 232 is simultaneously in contact with the side wall of the corresponding steel sheet pile 11. The backing plate 232 can increase the contact area between the hook 231 and the side wall of the corresponding steel sheet pile 11, reduce the pressure exerted by the hook 231 on the side wall of the steel sheet pile 11, and reduce the deformation of the steel sheet pile 11 under the action of the tensile force.

[0041] Refer to Figure 3 , a plurality of dovetail grooves 25 are provided on the side walls of the outer four sides of the waling 2, and a plurality of dovetail blocks 13 are welded and connected to the inner side walls of the four sides of the cofferdam 1. The dovetail blocks 13 are arranged vertically, and the plurality of dovetail grooves 25 are respectively and evenly arranged on the side walls of the corresponding steel sheet piles 11; when the waling 2 moves down into the cofferdam 1, the dovetail blocks 13 are inserted into the corresponding dovetail grooves 25. The cooperation between the dovetail blocks 13 and the dovetail grooves 25 can limit the position between the waling 2 and the steel sheet piles 11 in the horizontal direction, and reduce the inclination and misalignment between the steel sheet piles 11 and the waling 2 in the horizontal direction under the action of the external water pressure.

[0042] Refer to Figure 3 and Figure 4 , a guide rod 15 is rotatably connected to the upper end of the dovetail block 13. The guide rod 15 can be inclined towards the outside of the waling 2. A spring 14 is connected between the guide rod 15 and the dovetail block 13, and the spring 14 can pull the guide rod 15 to be parallel to the dovetail block 13; when the waling 2 moves down into the cofferdam 1, it will swing, resulting in misalignment between the dovetail block 13 and the dovetail groove 25 and making it difficult to align. The setting of the guide rod 15 makes it so that when the waling 2 moves down into the cofferdam 1, the waling 2 contacts the guide rod 15 first, and the guide rod 15 is simultaneously inserted into the dovetail groove 25. That is, when the waling 2 shakes and pushes the guide rod 15 to rotate and incline towards the outside of the waling 2, the spring 14 can also pull the guide rod 15 to always be located in the dovetail groove 25, so that the waling 2 moves down along the length direction of the guide rod 15, and gradually inserts the dovetail block 13 into the dovetail groove 25, improving the accuracy of inserting the dovetail block 13 into the dovetail groove 25.

[0043] Refer to Figure 4 , a plug-in plate 151 is rotatably connected to the end of the guide rod 15. The plug-in plate 151 is inserted into the dovetail block 13 along the upper end wall of the dovetail block 13, and the plug-in plate 151 is fixedly connected to the dovetail block 13 by bolts, thereby realizing the rotational connection between the guide rod 15 and the dovetail block 13.

[0044] Refer to Figure 4A receiving hole 131 is provided on the upper end wall of the dovetail block 13, the lower end of the spring 14 is inserted into the receiving hole 131 and the lower end of the spring 14 is welded to the bottom wall of the receiving hole 131; a connecting head 141 is welded to the upper end of the spring 14, and a mounting head 142 is coaxially rotatably connected to the connecting head 141. The mounting head 142 is inserted into a threaded hole pre-opened on the end wall of the guide rod 15 and is threadedly connected to the threaded hole, thereby realizing a detachable connection between the spring 14 and the guide rod 15.

[0045] The implementation principle of a steel sheet pile support device for underwater pier construction in the embodiment of the present application is as follows:

[0046] When installing the purlin 2, first lift the bottom frame 22 with a crane, lower it and insert it into the cofferdam 1; when the bottom frame 22 moves down, the pull plate 23 on the bottom frame 22 contacts the upper end of the cofferdam 1 and rotates upward during the bottom frame 22 moving down. After the pull plate 23 on the bottom frame 22 rotates to be offset from the cofferdam 1, it moves down synchronously with the bottom frame 22; the pull hook 231 of the pull plate 23 on the bottom frame 22 enters the groove on the steel sheet pile 11 and moves down along the length direction of the groove, and the bottom frame 22 moves down along the length direction of the groove. After the frame 22 drives its own hook 231 to move to the position of the pull ring 12, as the bottom frame 22 moves, the hook 231 will be hooked with the pull ring 12, further fixing the bottom frame 22 in the cofferdam 1; at the same time, the pull plate 23 on the bottom frame 22 rotates to abut against the limit head 241 of the upper limit plate 24 on the bottom frame 22, limiting the position of the pull plate 23, and reducing the situation where the pull hook 231 on the bottom frame 22 and the corresponding pull ring 12 are misaligned due to excessive rotation of the pull plate 23.

[0047] After installing the bottom frame 22, the top frame 21 is lifted by a crane and lowered into the cofferdam 1; during the lowering process of the top frame 21, the pull plate 23 on the top frame 21 contacts the upper end of the cofferdam 1 and rotates upward during the downward movement of the top frame 21. After the pull plate 23 on the top frame 21 rotates to be offset from the cofferdam 1, it moves downward synchronously with the top frame 21; after the top frame 21 moves further downward, the pull hook 231 on the top frame 21 will be hooked with the upper end of the steel sheet pile 11 constituting the cofferdam 1, and the top frame 21 is fixedly hung in the cofferdam 1, thereby realizing the installation of the cofferdam 2. The arrangement of the pull plate 23 and the pull hook 231, as well as the coordination of the limit plate 24, the limit head 241 and the pull plate 23, allows the purlin 2 to be directly hoisted during installation. The downward movement of the purlin 2 can drive the pull hook 231 to connect with the steel sheet pile 11 of the cofferdam 1, thereby reducing the construction process of welding the purlin 2 by construction personnel and improving the installation efficiency of the steel sheet pile 11 support device.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steel sheet pile support device for the construction of a pier in water, comprising a waling beam (2), and the waling beam (2) is in a rectangular frame shape; characterized in that: A drawplate (23) is rotatably connected to the top wall of the waling beam (2). The width of the drawplate (23) is greater than the width of the frame of the waling beam (2). The drawplate (23) is connected to one side of the top wall of the waling beam (2) close to the inner side wall. The side of the drawplate (23) away from the connection point extends out from the outer side wall of the waling beam (2). A plurality of hooks (231) for connecting with the steel sheet pile (11) are arranged on the side of the drawplate (23) away from the connection point. A limiting plate (24) is arranged on the top wall of the waling beam (2). The limiting plate (24) penetrates the drawplate (23). A limiting head (241) for limiting the drawplate (23) is arranged at the end of the limiting plate (24).

2. The steel sheet pile support device for underwater pier construction according to claim 1, characterized in that: A dovetail groove (25) is arranged on the outer side wall of the waling beam (2). A dovetail block (13) pre - arranged on the inner side wall of the steel sheet pile (11) is inserted into the dovetail groove (25). The dovetail block (13) is inserted into the dovetail groove (25) and is adapted to the dovetail groove (25).

3. The steel sheet pile support device for underwater pier construction according to claim 1, characterized in that: At least two waling beams (2) are provided. The waling beam (2) includes a top frame (21) and a bottom frame (22). The top frame (21) is located at the uppermost end. The hooks (231) of the top frame (21) are used for hooking the upper end of the steel sheet pile (11). The hooks (231) of the top frame (21) are located at the corresponding positions where the top frame (21) is in contact with the side wall of the steel sheet pile (11). The hooks (231) of the bottom frame (22) are located on the side wall at the corresponding positions of the groove of the top frame (21) and the steel sheet pile (11). A plurality of pull rings (12) pre - arranged in the groove of the steel sheet pile (11) are arranged on one side of the bottom frame (22). The hooks (231) of the bottom frame (22) are respectively hooked with the corresponding pull rings (12).

4. The steel sheet pile support device for underwater pier construction according to claim 3, characterized in that: A backing plate (232) is arranged in the hook (231) of the top frame (21). The width of the backing plate (232) is greater than the width of the hook (231) of the top frame (21). The backing plate (232) is used for being in contact with the outer side wall of the steel sheet pile (11).

5. The steel sheet pile support device for underwater pier construction according to claim 2, characterized in that: A guide rod (15) is arranged at the upper end of the dovetail block (13). The guide rod (15) is inclined in the direction of the outside of the waling beam (2). The guide rod (15) can be inserted into the dovetail groove (25).

6. The steel sheet pile support device for underwater pier construction according to claim 5, characterized in that: The guide rod (15) is rotatably connected to the dovetail block (13). A spring (14) for pulling the guide rod (15) and the dovetail block (13) to be parallel is connected between the guide rod (15) and the dovetail block (13).

7. A steel sheet pile support device for underwater pier construction according to claim 6, characterized in that: A receiving hole (131) for inserting the spring (14) is formed on the upper end wall of the dovetail block (13). The lower end of the spring (14) is fixedly connected to the bottom wall of the receiving hole (131).

8. A steel sheet pile support device for underwater pier construction according to claim 6, characterized in that: A plug - in plate (151) is rotatably connected to the end of the guide rod (15). The plug - in plate (151) is inserted along the upper end wall of the dovetail block (13) into the dovetail block (13) and is detachably connected to the dovetail block (13). The upper end of the spring (14) is detachably connected to the guide rod (15).

9. The steel sheet pile support device for underwater pier construction according to claim 8, characterized in that: The upper end of the spring (14) is connected with a connecting head (141), the end of the connecting head (141) is rotatably connected with a mounting head (142), and the mounting head (142) is inserted into the guide rod (15) and is in threaded connection with the guide rod (15).

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