Steel sheet pile construction device and method

Abstract

The invention provides a steel sheet pile construction device and method, and belongs to the technical field of steel sheet pile construction.Larsen steel sheet piles are arranged along the inner side wall of a foundation pit according to a drawing, every two adjacent Larsen steel sheet piles are buckled with each other in the mode that openings are opposite to each other to form a supporting layer, and surrounding purlins are arranged on the inner side of the supporting layer; fixing lugs are arranged on the enclosing purlins; the first connecting end of a chain type tensioning supporting piece is connected with the Larsen steel sheet pile, and a chain body penetrates through the fixing lug; a pre-tightening device is used for applying pulling force to the first connecting end of the chain type tensioning supporting piece, so that the chain type tensioning supporting piece is pre-tightened; and the second connecting end of the chain type tensioning supporting piece is connected with the Larsen steel sheet pile. The device is easy and convenient to disassemble and assemble, can be repeatedly used, overcomes the defects that a traditional connecting mode is difficult to disassemble and long in consumed time, and achieves the technical effect of improving the flexibility and convenience of construction.

Description

Technical Field

[0001] The present invention relates to the technical field of steel sheet pile construction, in particular to a steel sheet pile construction device and a method thereof. Background Art

[0002] Larsen steel sheet piles are a common foundation construction material and method, primarily used for soil and water retaining support, as well as for waterproofing curtains. The construction process is relatively simple. Using equipment such as vibratory hammers or static pressure, the piles can be quickly driven into the ground. They are also reusable, significantly improving construction efficiency and reducing costs. Larsen steel sheet piles are suitable for applications such as deep foundation pit support, river and canal revetments, and temporary cofferdams.

[0003] In some deeper foundation pits or projects with high stress, or in construction scenarios where the depth of Larsen steel sheet piles buried in the ground is less than half the length of the steel sheet piles, or in particularly poor geological conditions, Larsen steel sheet pile support usually requires internal supports or anchor rods to enhance its stability. Internal supports can be made of steel or concrete. However, this connection method has many shortcomings. On the one hand, the welded bracket makes the structure more bulky, increasing the amount of material used and the deadweight of the structure. On the other hand, both the installation and removal processes take a long time, reducing construction efficiency. In addition, the welding operation itself will cause thermal damage to the steel sheet piles, affecting their local mechanical properties, which may have an adverse effect on the safety and durability of the entire foundation pit support structure.

[0004] The prior art discloses a detachable corbel bracket for steel sheet pile cofferdam construction (CN219527702U). The corbel bracket is composed of a detachable upper and lower bracket units. The upper bracket unit includes an upper upright plate with an upper hook plate fixed to its top, forming an L-shaped overall structure. The lower bracket unit includes a lower upright plate with a lower positioning support plate fixed to its bottom, and a purlin support plate fixed to its middle. The upper hook plate and lower positioning support plate of the corbel bracket are located on the same side, while the purlin support plate is located on the other side of the corbel bracket. While this prior art avoids the need for welding operations during steel sheet pile cofferdam construction, it still suffers from drawbacks such as a complex structure and cumbersome operation.

[0005] Therefore, a high-efficiency steel sheet pile construction method is urgently needed. Summary of the Invention

[0006] The object of the present invention is to provide a steel sheet pile construction device and method thereof to solve at least one technical problem existing in the prior art.

[0007] The present invention protects a steel sheet pile construction method, which includes setting Larsen steel sheet piles along the inner wall of a foundation pit according to a drawing, and interlocking two adjacent Larsen steel sheet piles with their openings opposite to each other to form a supporting layer, wherein the Larsen steel sheet pile includes a first bending portion and a second bending portion provided at both ends, and a support portion for connecting the first bending portion and the second bending portion; the free end of the first bending portion is bent along a first direction to form a first engaging end, and the free end of the second bending portion is bent along a second direction to form a second engaging end; the first direction and the second direction are opposite directions;

[0008] Arranging a perimeter purlin on the inner side of the supporting layer;

[0009] providing fixing ears on the purlin;

[0010] Connecting the first connecting end of the chain tensioning support to the Larsen steel sheet pile, with the chain body passing through the fixing ear;

[0011] Applying tension to the first connecting end of the chain tensioning support member using a pre-tightening device to pre-tighten the chain tensioning support member;

[0012] The second connecting end of the chain tensioning support is connected to the Larsen steel sheet pile.

[0013] Furthermore, a preferred method is to use a pre-tightening device to apply tension to the first connecting end of the chain tensioning support member, so that the method for pre-tightening the chain tensioning support member includes:

[0014] Connecting the pre-tightening device to the first connecting end of the chain tensioning support member;

[0015] The pre-tightening device pre-tightens the first connecting end of the chain tensioning support member according to a preset tension value.

[0016] In a second aspect, the present invention also protects a steel sheet pile construction device for implementing the steel sheet pile construction method described above; comprising a Larsen steel sheet pile, a perimeter purlin, and a chain tensioning support for supporting the Larsen steel sheet pile;

[0017] The Larsen steel sheet piles are arranged along the inner wall of the foundation pit to form a supporting layer, wherein the supporting layer is formed by correspondingly fastening and connecting adjacent Larsen steel sheet piles;

[0018] The perimeter purlin is arranged on the inner side of the supporting layer;

[0019] The chain tensioning support comprises a first connecting end and a second connecting end, and a chain body for connecting the first connecting end and the second connecting end;

[0020] A fixing ear is provided on the purlin, the first connecting end of the chain tensioning support is detachably connected to the Larsen steel sheet pile, the chain body passes through the fixing ear, and the second connecting end of the chain tensioning support is detachably connected to the Larsen steel sheet pile.

[0021] Furthermore, a preferred structure is that the first connecting end and the second connecting end are grab hooks; and the connection between the grab hooks and the Larsen steel sheet piles is the bottom bending corner of the Larsen steel sheet pile.

[0022] Furthermore, a preferred structure is that the first connecting end and the second connecting end are grab hooks; a first fixing ring and a second fixing ring corresponding to the first connecting end and the second connecting end are respectively provided on the Larsen steel sheet pile; the first fixing ring and the second fixing ring are welded to the Larsen steel sheet pile.

[0023] Furthermore, a preferred structure is that the number of the first fixing rings provided is at least two; and the number of the grab hooks provided at the first connecting end is the same as the number of the first fixing rings provided.

[0024] Furthermore, a preferred structure is that a fixing ear mounting hole is opened on the surrounding purlin; and the fixing ear is detachably mounted in the fixing ear mounting hole by means of a bolt.

[0025] Furthermore, a preferred structure further includes a pre-tensioning device for tensioning the chain tensioning support member.

[0026] Furthermore, a preferred structure is that the pre-tightening device is a pneumatic device or a hydraulic device.

[0027] Furthermore, a preferred structure is that a protective coating is provided on the first connecting end, the second connecting end and the chain body of the chain tensioning support; the protective coating is a hot-dip galvanized layer or an epoxy powder coating.

[0028] As described above, the steel sheet pile construction device and method of the present invention form fixed support for the tensioning force of the fixed ears set on the purlin and the lateral extrusion force of the Larsen steel sheet piles through chain tensioning supports, forming an efficient and stable support system; the present invention is easy and convenient to disassemble and assemble, and can be reused, overcoming the shortcomings of traditional connection methods that are difficult and time-consuming to dismantle, and achieving the technical effect of improving the flexibility and convenience of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By referring to the following description and claims in conjunction with the accompanying drawings, and with a more complete understanding of the present invention, other objects and results of the present invention will become more apparent and readily understood. In the accompanying drawings:

[0030] Figure 11 is a flow chart of a steel sheet pile construction method according to an embodiment of the present invention.

[0031] Figure 2 2 is a schematic structural diagram of a steel sheet pile construction device according to an embodiment of the present invention.

[0032] Figure 3 2 is a schematic structural diagram of a steel sheet pile according to an embodiment of the present invention.

[0033] Among them, 11, first Larsen steel sheet pile; 12, second Larsen steel sheet pile; 20, chain tensioning support; 30, purlin; 111, first bending portion; 112, supporting portion; 113, second bending portion; 114, first clamping end; 115, second clamping end; 116, first bottom bending angle; 117, second bottom bending angle. DETAILED DESCRIPTION

[0034] In the following description, for illustrative purposes, numerous specific details are set forth to provide a comprehensive understanding of one or more embodiments. However, it will be apparent that the embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form to facilitate description of one or more embodiments.

[0035] It should be understood that terms such as “horizontal,” “vertical,” “up,” “down,” “top,” “middle,” “length,” “inside,” and “bottom” that indicate orientation or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] Unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication between them; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] Example 1

[0038] Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] Figure 1 2 is a flow chart of a steel sheet pile construction method according to an embodiment of the present invention.

[0040] The present invention protects a steel sheet pile construction method, such as Figure 1 As shown, the method includes the following steps.

[0041] S110. Larsen steel sheet piles are set along the inner wall of the foundation pit according to the drawings. Two adjacent Larsen steel sheet piles are interlocked with each other with their openings opposite to each other to form a supporting layer. The Larsen steel sheet piles include a first bending portion and a second bending portion arranged at both ends, and a supporting portion for connecting the first bending portion and the second bending portion; the free end of the first bending portion is bent along a first direction to form a first engaging end, and the free end of the second bending portion is bent along a second direction to form a second engaging end; the first direction and the second direction are opposite directions.

[0042] The specifications of the steel sheet piles are DN1000mm×20mm×8mm, with a length of 3m. They are constructed by vibratory hammer driving at a depth of 1.5m.

[0043] S120, set a purlin on the inner side of the support layer. Step 203, weld a lifting ring on the support connecting piece on the support horizontal surface, using 304 stainless steel material, and the lifting ring has a diameter of 80mm.

[0044] S130. Install fixing lugs on the purlin. Specifically, four through-holes with a diameter of 12 mm are pre-set on the purlin. The spacing between the through-holes is 50 mm, determined based on the specifications of the steel sheet piles. In this embodiment, the fixing lugs can be M12 lifting rings. The M12 lifting rings are fixed to the purlin by drilling holes and securing with M16×150 mm bolts.

[0045] During implementation, the optimal location of the fixing lugs on the purlin can be determined through detailed mechanical analysis and numerical simulation. Placing the fixing lugs in areas of the purlin subject to greater tensile stress allows the chain's tension to more effectively integrate with the purlin's load-bearing structure, improving support effectiveness. Furthermore, the spacing between the fixing lugs should be appropriately adjusted to avoid uneven localized stress on the purlin due to excessive spacing, or material waste and construction inconvenience due to insufficient spacing.

[0046] S140, connecting the first connecting end of the chain tensioning support member to the Larsen steel sheet pile, and passing the chain body through the fixing lug. In this embodiment, the first connecting end and the second connecting end of the chain tensioning support member are both grab hooks.

[0047] It should be noted that the length of the chain tensioning support is determined by measuring the thickness of the steel sheet pile. The chain is adjusted to the appropriate length to connect one end to the Larsen steel sheet pile, pass through the fixing lug on the purlin, and then remain connected to the Larsen steel sheet pile at the other end.

[0048] During implementation, check the load capacity of the double grapple to ensure it exceeds the weight of the steel sheet pile. For example, the double grapple model is 2T-1M, with a maximum load of 2 tons. Connect one hook head of the double grapple of the chain tensioning support to the Larsen steel sheet pile, locking the hook head into the U-shaped groove of the steel sheet pile. Pass the chain through the fixing lugs. Then, tension the chain tensioning support with the other hook head of the double grapple.

[0049] S150: Apply tension to the first connection end of the chain tensioning support member using a pre-tightening device to pre-tighten the chain tensioning support member.

[0050] A method for pre-tightening a chain tensioning support member by applying tension to a first connection end of the chain tensioning support member using a pre-tightening device includes connecting the pre-tightening device to the first connection end of the chain tensioning support member; the pre-tightening device pre-tightens the first connection end of the chain tensioning support member according to a preset tension value. Specifically, the pre-tightening device may be a manual pre-tightening device. The manual pre-tightening device, such as a screw jack or a manual tensioner, is installed on the chain tensioning support member. Manual operation of the pre-tightening device pre-tightens the chain, tightening the connection between the Larsen steel sheet pile and the purlin. This allows for faster formation of an effective support structure during construction, reduces adjustment time during subsequent tensioning, and improves construction efficiency. As an improvement to this embodiment, the pre-tightening device may be an automatic pre-tightening system that pre-tightens the chain using a hydraulic or pneumatic device. The automatic pre-tightening system automatically controls the pre-tightening level according to the preset tension value, achieving precise pre-tightening operation and improving the quality and consistency of the support structure. At the same time, the automatic pre-tightening system can be linked with other parts of the support device to further optimize the construction process and save manpower and time costs.

[0051] S160: Connect the second connection end of the chain tensioning support to the Larsen steel sheet pile.

[0052] The U-shaped groove of the Larsen steel sheet pile is tightly fitted to the outside of the purlin to ensure the connection stability. The elastic deformation of the chain is used to press the steel sheet pile against the outside of the purlin.

[0053] The steel sheet pile construction method of the present invention adopts a 10-ton 1-meter lifting chain as the chain body, and sets double hooks at both ends of the chain body; by passing the chain tensioning support through the upper lifting ring of the purlin and connecting the hook with the bottom bending angle of the Larsen steel sheet pile, the chain tensioning support and the steel sheet pile can be detachably connected, which is convenient for installation and removal operations during construction; the problem of thermal damage to the steel sheet pile caused by welding corbels is avoided, the mechanical properties of the steel sheet piles are effectively improved, and the durability of the foundation pit support structure is extended; in addition, the stress-tensioning connection method is adopted, which reduces the construction time of traditional welded corbels, saves the steel used for corbels, significantly reduces construction costs, and improves construction efficiency.

[0054] Example 2

[0055] Figure 2 and Figure 3 The structure of the steel sheet pile construction device is described in general; Figure 2 2 is a schematic structural diagram of a steel sheet pile construction device according to an embodiment of the present invention. Figure 3 2 is a schematic structural diagram of a steel sheet pile according to an embodiment of the present invention.

[0056] like Figure 2 and Figure 3 As shown, the present invention also protects a steel sheet pile construction device for implementing the steel sheet pile construction method as described above; it includes Larsen steel sheet piles, purlins 30 and chain tensioning supports 20 for supporting the Larsen steel sheet piles; the Larsen steel sheet piles are arranged along the inner wall of the foundation pit to form a support layer, and two adjacent Larsen steel sheet piles are interlocked with each other in an opposite opening manner to form a support layer; that is, the first Larsen steel sheet pile 11 and the adjacent second Larsen steel sheet pile 12 are interlocked with each other in an opposite opening manner to form a support layer; wherein, the Larsen steel sheet pile includes a first bending portion 111 and a second bending portion 113 arranged at both ends and a support portion 112 for connecting the first bending portion 111 and the second bending portion 113; the free end of the first bending portion 111 is bent along a first direction to form a first engaging end 114, and the free end of the second bending portion 113 is bent along a second direction to form a second engaging end 115; the first direction and the second direction are opposite directions.

[0057] Wherein, the supporting layer is formed by corresponding buckling connections of adjacent Larsen steel sheet piles; the purlin 30 is arranged on the inner side of the supporting layer; the chain tensioning support 20 includes a first connecting end and a second connecting end, and a chain body for connecting the first connecting end and the second connecting end; a fixing ear is provided on the purlin 30, and the first connecting end of the chain tensioning support 20 is detachably connected to the Larsen steel sheet pile, the chain body passes through the fixing ear, and the second connecting end of the chain tensioning support 20 is detachably connected to the Larsen steel sheet pile.

[0058] The first connection end and the second connection end are grab hooks; the connection between the grab hook and the Larsen steel sheet pile is the bottom bending angle of the Larsen steel sheet pile; that is, the grab hook of the first connection end of the chain tensioning support 20 is clamped with the first bottom bending angle 116 of the Larsen steel sheet pile; the grab hook of the second connection end of the chain tensioning support 20 is clamped with the second bottom bending angle 117 of the Larsen steel sheet pile.

[0059] A fixing ear mounting hole is provided on the purlin 30; the fixing ear is detachably mounted in the fixing ear mounting hole by means of bolts. The location of the fixing ear mounting hole is set according to the specific implementation scenario, that is, on the purlin 30, the spacing distance between adjacent fixing ears can be set according to actual needs. The connection method of the fixing ears detachably mounted on the purlin by bolts of the present invention has the characteristics of simple structure and convenient operation. It is suitable for steel sheet piles and purlins of different specifications and models, has good versatility and practicality, and can meet the support needs in various complex construction environments. The connection structure is easy and convenient to assemble and disassemble and is reusable, which overcomes the shortcomings of the traditional connection method that is difficult and time-consuming to dismantle, and greatly improves the flexibility and convenience of construction.

[0060] Example 3

[0061] The present invention also protects a steel sheet pile construction device for implementing the steel sheet pile construction method as described above; it includes Larsen steel sheet piles, purlins 30 and chain tensioning supports 20 for supporting the Larsen steel sheet piles; the Larsen steel sheet piles are arranged along the inner wall of the foundation pit to form a support layer, and two adjacent Larsen steel sheet piles are interlocked with each other in an opposite manner to form a support layer; that is, the first Larsen steel sheet pile 11 and the adjacent second Larsen steel sheet pile 12 are interlocked with each other in an opposite manner to form a support layer; wherein the Larsen steel sheet pile includes a first bending portion 111 and a second bending portion 113 arranged at both ends and a support portion 112 for connecting the first bending portion 111 and the second bending portion 113; the free end of the first bending portion 111 is bent along a first direction to form a first clamping end 114, and the free end of the second bending portion 113 is bent along a second direction to form a second clamping end 115; the first direction and the second direction are opposite directions.

[0062] The support layer is formed by correspondingly interlocking adjacent Larsen steel sheet piles; the perimeter purlin 30 is disposed on the inner side of the support layer; the chain tensioning support 20 includes a first connecting end, a second connecting end, and a chain body for connecting the first and second connecting ends; the perimeter purlin 30 is provided with a fixing lug, the first connecting end of the chain tensioning support 20 being detachably connected to the Larsen steel sheet pile, the chain body passing through the fixing lug, and the second connecting end of the chain tensioning support 20 being detachably connected to the Larsen steel sheet pile. In specific implementations, the chain body of the chain tensioning support 20 is manufactured from an alloy material with higher strength and toughness, such as alloy steel with trace elements such as vanadium and niobium added. This improves the tensile strength and fatigue life of the chain, enabling it to withstand greater tension and more complex stress environments. This also reduces the weight of the chain to a certain extent, facilitating construction operations and transportation.

[0063] The first connecting end and the second connecting end are grab hooks. In order to further limit the fixed position of the grab hook on the Larsen steel sheet pile and prevent it from displacement. A first fixing ring and a second fixing ring corresponding to the first connecting end and the second connecting end are respectively provided on the Larsen steel sheet pile; the first fixing ring and the second fixing ring are welded to the Larsen steel sheet pile. It should be noted that, as an improvement of this embodiment, in order to avoid the problem of thermal damage to the steel sheet pile caused by welding the corbel, a fixing ring mounting hole is provided on the Larsen steel sheet pile; the fixing ring is detachably mounted in the fixing ring mounting hole by bolts. The setting mode of the fixing ring is changed from welding to screwing; the mechanical properties of the steel sheet pile are effectively improved, and the durability of the foundation pit support structure is extended.

[0064] That is to say, the grab hook at the first connecting end of the chain tensioning support 20 is clamped with the first fixing ring at the first bottom bending angle of the Larsen steel sheet pile; the grab hook at the second connecting end of the chain tensioning support 20 is clamped with the second fixing ring at the second bottom bending angle 117 of the Larsen steel sheet pile.

[0065] As an improvement to this embodiment, the Larsen steel sheet pile has a first fixing ring at the first bottom bend; at least two of the first fixing rings are provided; and the number of grab hooks provided at the first connection end is the same as the number of the first fixing rings. It should be noted that by replacing the single connection end with a multi-point connection structure, such as providing multiple connection hooks at the connection end, multiple connection points (connection rings) on the steel sheet pile can be connected simultaneously, thereby enhancing the stability and reliability of the connection, dispersing the force, reducing local stress concentration, and improving the overall bearing capacity of the support structure.

[0066] It also includes a pre-tightening device for tensioning the chain tensioning support member 20. The pre-tightening device is a pneumatic device or a hydraulic device.

[0067] As an improvement to this embodiment, a protective coating is provided on the first and second connecting ends of the chain tensioning support 20, as well as on the chain body; the protective coating is a hot-dip galvanizing layer or an epoxy powder coating. The chain surface is subjected to a special protective coating treatment, such as hot-dip galvanizing or epoxy powder coating. Hot-dip galvanizing forms a dense zinc-iron alloy layer on the chain surface, effectively preventing rust in humid and corrosive environments. Epoxy powder coating has excellent wear resistance, corrosion resistance, and insulation properties, protecting the chain from damage during long-term use, reducing maintenance costs, and ensuring stable chain performance.

[0068] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference to a figure in a claim should not be construed as limiting the claim to which it relates.

[0069] Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices recited in a device claim may also be implemented by a single unit or device through software or hardware. The rolling mill dust removal device and rolling mill dust removal method according to the present invention are described above by way of example with reference to the accompanying drawings.

Claims

1. A steel sheet pile construction method, characterized in that: The steps include: According to the drawings, Larsen steel sheet piles are arranged along the inner side wall of the foundation pit, and two adjacent Larsen steel sheet piles are interlocked with each other with their openings facing each other to form a supporting layer, wherein the Larsen steel sheet piles include a first bending portion and a second bending portion provided at both ends, and a support portion for connecting the first bending portion and the second bending portion; the free end of the first bending portion is bent along a first direction to form a first engaging end, and the free end of the second bending portion is bent along a second direction to form a second engaging end; the first direction and the second direction are opposite directions; Arranging a perimeter purlin on the inner side of the supporting layer; providing fixing ears on the purlin; Connecting the first connecting end of the chain tensioning support to the Larsen steel sheet pile, with the chain body passing through the fixing ear; Applying tension to the first connecting end of the chain tensioning support member using a pre-tightening device to pre-tighten the chain tensioning support member; The second connecting end of the chain tensioning support is connected to the Larsen steel sheet pile.

2. The steel sheet pile construction method according to claim 1, characterized in that: The method of applying tension to the first connection end of the chain tensioning support member by using a pre-tightening device to pre-tighten the chain tensioning support member includes: Connecting the pre-tightening device to the first connecting end of the chain tensioning support member; The pre-tightening device pre-tightens the first connecting end of the chain tensioning support member according to a preset tension value.

3. A steel sheet pile construction device, characterized in that: Used to implement the steel sheet pile construction method according to claim 1; comprising Larsen steel sheet piles, perimeter purlins and chain tensioning supports for supporting the Larsen steel sheet piles; The Larsen steel sheet piles are arranged along the inner wall of the foundation pit to form a supporting layer, wherein the supporting layer is formed by correspondingly fastening and connecting adjacent Larsen steel sheet piles; The perimeter purlin is arranged on the inner side of the supporting layer; The chain tensioning support comprises a first connecting end and a second connecting end, and a chain body for connecting the first connecting end and the second connecting end; A fixing ear is provided on the purlin, the first connecting end of the chain tensioning support is detachably connected to the Larsen steel sheet pile, the chain body passes through the fixing ear, and the second connecting end of the chain tensioning support is detachably connected to the Larsen steel sheet pile.

4. The steel sheet pile construction device according to claim 3, characterized in that: The first connecting end and the second connecting end are grab hooks; the connection between the grab hook and the Larsen steel sheet pile is the bottom bending corner of the Larsen steel sheet pile.

5. The steel sheet pile construction device according to claim 3, characterized in that: The first connecting end and the second connecting end are grab hooks; a first fixing ring and a second fixing ring corresponding to the first connecting end and the second connecting end are respectively provided on the Larsen steel sheet pile; the first fixing ring and the second fixing ring are welded to the Larsen steel sheet pile.

6. The steel sheet pile construction device according to claim 5, characterized in that: The number of the first fixing rings is at least two; the number of the grab hooks at the first connecting end is the same as the number of the first fixing rings.

7. The steel sheet pile construction device according to claim 3, characterized in that: A fixing ear mounting hole is opened on the surrounding purlin; the fixing ear is detachably mounted in the fixing ear mounting hole by means of bolts.

8. The steel sheet pile construction device according to claim 3, characterized in that: It also includes a pre-tensioning device for tensioning the chain tensioning support member.

9. The steel sheet pile construction device according to claim 8, characterized in that: The pre-tightening device is a pneumatic device or a hydraulic device.

10. The steel sheet pile construction device according to claim 3, characterized in that: A protective coating is provided on the first connecting end, the second connecting end and the chain body of the chain tensioning support; the protective coating is a hot-dip galvanized layer or an epoxy powder coating.

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