An improved Larsen steel sheet pile and its construction method

Abstract

The present application relates to the field of building construction, and in particular to an improved Larsen steel sheet pile and a construction method thereof, comprising a pile plate, side plates connected to both sides of the pile plate, and hanging ears fixed to both ends of the side plates, wherein a locking assembly is arranged at the connection between adjacent hanging ears, and the locking assembly comprises an end plate, wherein two groups of panels are fixedly arranged on the lower surface of the end plate, each group of panels is two, and the two panels of each group are opposite to each other and arranged in a spiral shape, so as to embed the hanging ear between the two panels, and an elliptical insertion rod is fixedly arranged at the bottom center position of the end plate, and the insertion rod is used to insert the center position of the two groups of hanging ears and abut against the center side wall of the hanging ear, which has the advantage of improving the stability of the connection between adjacent Larsen steel sheet piles.

Description

Technical Field

[0001] The present application relates to the field of building construction, and in particular to an improved Larsen steel sheet pile and a construction method thereof. Background Art

[0002] Larsen steel sheet piles are usually used as cofferdams or foundation pit support structures in engineering. During construction, Larsen steel sheet piles are driven vertically into the construction ground, and multiple Larsen steel sheet piles are connected end to end to form a barrier, thereby protecting the construction site.

[0003] In the related art, the construction process of Larsen steel sheet piles mainly includes the following steps: first, a first group of Larsen steel sheet piles are driven into the ground to complete the initial installation; then, the hanging ears of another group of Larsen steel sheet piles are aligned with the hanging ears of the Larsen steel sheet piles that have been driven into the ground; after alignment, the second group of Larsen steel sheet piles are driven in, and so on, so that multiple groups of Larsen steel sheet piles are connected in sequence.

[0004] However, in the above technical solution, after the installation of adjacent Larsen steel sheet piles, the connection formed only by the adjacent hanging ears is not stable enough. Summary of the invention

[0005] In order to improve the stability of the connection between adjacent Larsen steel sheet piles, the present application provides an improved Larsen steel sheet pile and a construction method thereof.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] On the one hand, the present application provides an improved Larsen steel sheet pile, comprising a pile plate, side plates connected to both sides of the pile plate, and ears fixed to both ends of the side plates, and a locking assembly is provided at the connection between adjacent ears, and the locking assembly includes an end plate, and two groups of panels are fixedly provided on the lower surface of the end plate, each group of panels consists of two panels, and the two panels of each group are opposite to each other and are arranged in a spiral shape, so as to embed the ear between the two panels, and an elliptical insertion rod is fixedly provided at the bottom center position of the end plate, and the insertion rod is used to insert the center position of the two groups of ears and abut against the center side wall of the ear.

[0008] Optionally, side rods fixed to the bottom surface of the end plate are provided on opposite sides of the insertion rod, and the two sides of the side rods are in arc shapes adapted to the opposite side walls of two groups of different insert panels.

[0009] Optionally, a plurality of vertically arranged inserting-assisting shafts are fixedly provided at the bottom end of the side rod, and the distance from the top of the side rod to the bottom of the inserting-assisting shaft is less than the height of the side plate.

[0010] Optionally, a soil placement groove is provided at the bottom of the insertion rod and passes vertically upward.

[0011] Optionally, the end plate is provided with an embedding groove in a region between two insert plates in the same group, and the embedding groove is used to embed with the end of the hanging ear.

[0012] Optionally, horizontally facing connecting slots are provided at the top positions of the center sections of the two groups of hanging ears, connecting strips are horizontally inserted into the connecting slots, and a mounting groove for embedding the connecting strip is provided at the bottom center position of the end plate.

[0013] Optionally, a semi-circular arc plate is fixedly provided at the connection position of the side plate with the hanging ear, and the side of the semi-circular arc plate away from the surface of the side plate is in an outwardly convex arc shape.

[0014] Optionally, the length of the insertion rod is greater than the height of the side panel.

[0015] On the other hand, the present application provides an improved Larsen steel sheet pile construction method, comprising the following steps:

[0016] S1. Drive the first Larsen steel sheet pile into the ground at the predetermined position, leaving half of its height above the ground;

[0017] S2. Align the lugs of the new Larsen steel sheet piles with the lugs of the Larsen steel sheet piles that have been driven into the ground, and continue to drive the new Larsen steel sheet piles into the part below the ground, keeping the heights of the two groups of Larsen steel sheet piles flush;

[0018] S3, adjusting the connection position of the hanging ears of the two groups of Larsen steel sheet piles, and connecting the adjacent hanging ears by using the locking assembly; specifically, inserting the insertion rod into the center position of the two groups of hanging ears, and inserting the bottom end of the insertion rod below the ground until the hanging ears are embedded between the panels, the connecting strip is inserted into the connecting notch, and the bottom surface of the end plate abuts against the upper end surface of the hanging ears;

[0019] S4. Repeat steps S2 and S3 to complete the installation of all Larsen steel sheet piles.

[0020] By adopting the above technical solution, a locking assembly is passed between adjacent Larsen steel sheet piles so that two Larsen steel sheet piles can be kept in close connection, and a plunger is provided at the center of the end plate. On the one hand, the plunger can contact the inner wall of the hanging ear and squeeze the two hanging ears away from each other, and the bottom end of the plunger is inserted below the ground to keep the stability of the entire locking assembly. On the other hand, while squeezing, the hanging ears can be restricted between the panels, so that the connection of the hanging ears can be kept in close contact; at the same time, the side rods also abut against the side walls of the hanging ears, further improving the tightness of the connection of the hanging ears. In summary, the present invention can greatly improve the tightness of the connection of adjacent Larsen steel sheet piles by providing a locking assembly, so that the enclosure structure formed after the Larsen steel sheet piles are connected is more stable and firm.

[0021] In summary, this application has the following technical effects:

[0022] 1. By setting a locking assembly at the connection of the hanging ears of adjacent Larsen steel sheet piles, the connection of adjacent Larsen steel sheet piles is made tighter and firmer;

[0023] 2. By arranging a plug rod inserted into the ground at the bottom center of the end plate, the embedded panel surrounding the hanging ear is more stable. At the same time, the plug rod will keep the distance between the two hanging ears constant and form a stable connection by using the plug rod;

[0024] 3. By arranging side rods on both sides of the insertion rod at the bottom of the end plate, and inserting the bottom of the side rods below the ground through the auxiliary insertion shaft, the two sides of the hanging ears are squeezed and positioned by the side rods and the insertion rod, further improving the connection tightness of the hanging ears. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of adjacent Larsen steel sheet piles connected in an embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of a locking assembly in an embodiment of the present application;

[0027] Figure 3 is an exploded schematic diagram of a locking assembly in an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of the structure of the hidden end plate after adjacent hanging ears are connected.

[0029] In the figure, 1, pile plate; 2, side plate; 3, hanging ear; 31, connecting groove; 4, locking assembly; 41, end plate; 411, embedded groove; 42, embedded plate; 43, insertion rod; 431, soil placement groove; 44, side rod; 441, auxiliary insertion shaft; 5, connecting strip; 6, installation groove. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1 The present application provides an improved Larsen steel sheet pile, comprising a pile plate 1, a side plate 2 and a hanging ear 3, wherein two groups of side plates 2 are provided, and the two groups of side plates 2 are respectively provided on both sides of the pile plate 1, and the two groups of side plates 2 extend in a direction away from the center of the pile plate 1, and the hanging ear 3 is provided at one end of the side plate 2 away from the pile plate 1, and the pile plate 1, the side plate 2 and the hanging ear 3 are integrally formed. Adjacent Larsen steel sheet piles are buckled by the hanging ear 3 and driven into the ground, and a locking assembly 4 for positioning and connecting two groups of adjacent Larsen steel sheet piles is provided at the connection of the hanging ear 3.

[0032] Combination Figure 2 and Figure 3The locking assembly 4 includes an end plate 41, a panel 42, a plug rod 43 and a side rod 44. Specifically, the end plate 41 is a horizontal plate-shaped structure, and its plane shape can be circular, square, or any other shape; the end plate 41 is used to cover the upper part of the connection of the hanging ear 3. There are two groups of panels 42, and each group of panels 42 has two opposite panels. In this embodiment, the panels 42 are fixed to the lower surface of the end plate 41. The two panels 42 in each group are arranged in a spiral shape around the hanging ear 3 as the center, and the distance between the two panels 42 is consistent with the thickness of the hanging ear 3. The lower surface of the end plate 41 is provided with an embedding groove 411 in the area between the two panels 42. When installing the locking assembly 4, align the end of the hanging ear 3 between the two panels 42, and then press down the end plate 41, so that the top of the hanging ear 3 is embedded between the two panels 42 and finally stuck in the embedding groove 411, and the interference fit between the panel 42 and the surface of the hanging ear 3 is used to realize the positioning of the hanging ear 3.

[0033] Furthermore, the insertion rod 43 is fixed at the center position of the lower surface of the end plate 41. The cross-section of the insertion rod 43 is elliptical so as to fit with the inner surface of the central opposite part of the two sets of panels 42. The overall length of the insertion rod 43 is greater than the length of the entire Larsen steel sheet pile, and a soil placement groove 431 is opened from bottom to top at the bottom of the insertion rod 43. When installing the locking assembly 4, the insertion rod 43 is inserted in the middle area surrounded by the two sets of panels 42, thereby squeezing the two hanging ears 3 outwards against each other. At the same time, the hanging ears 3 are embedded between the panels 42 and cooperate with each other, so that the connection between the hanging ears 3 of the two Larsen steel sheet piles maintains a tight and stable connection.

[0034] In this embodiment, in order to further improve the connection tightness of adjacent Larsen steel sheet piles, side rods 44 are provided on both sides of the opposite sides of the insertion rod 43. The length of the side rod 44 is less than the overall depth of the Larsen steel sheet pile. The top end of the side rod 44 is fixed to the lower surface of the end plate 41. The surface of the side rod 44 is arc-shaped so as to fit with the relative surface of the Larsen steel sheet pile. When setting the length of the side rod 44, ensure that at least half of its length is inserted below the ground.

[0035] A plurality of vertical auxiliary insertion shafts 441 are fixedly provided at the bottom end of the side rod 44. During construction, since the side rod 44 and the insertion rod 43 are respectively arranged in the gaps at the relative positions of the connection of the Larsen steel sheet pile hanging ear 3, the hanging ear 3 can be tightened more tightly after docking, further improving the stability of the connection of the hanging ear 3.

[0036] Combination Figure 3 and Figure 4A mounting groove 6 is provided at the center of the lower surface of the end plate 41, and a connecting strip 5 is clamped in the mounting groove 6. The lower surface of the connecting strip 5 is flush with the lower surface of the end plate 41, and the connecting strip 5 spans the two sets of inlay panels 42 and the inlay groove 411. A connecting notch 31 spanning the hanging ear 3 is provided at a corresponding position on the upper surface of the hanging ear 3. After the locking assembly 4 is installed, the hanging ear 3 is inserted into the inlay groove 411, and the connecting strip 5 is clamped into the connecting notch 31, so that the two sets of hanging ears 3 can be further restricted, thereby improving the stability of the connection.

[0037] This embodiment also discloses an improved Larsen steel sheet pile construction method, comprising the following steps:

[0038] S1. Drive the first Larsen steel sheet pile into the ground at the predetermined position, leaving half of its height above the ground;

[0039] S2, align the lug 3 of the new Larsen steel sheet pile with the lug 3 of the Larsen steel sheet pile that has been driven into the ground, and continue to drive the new Larsen steel sheet pile into the part below the ground, keeping the heights of the two groups of Larsen steel sheet piles flush;

[0040] S3, adjust the connection position of the hanging ears 3 of the two groups of Larsen steel sheet piles, and use the locking assembly 4 to connect the adjacent hanging ears 3; specifically, insert the insertion rod 43 into the center position of the two groups of hanging ears 3, and insert the bottom end of the insertion rod 43 below the ground, and at the same time, insert the side rod 44 into the gap between the two groups of hanging ears 3, the auxiliary insertion shaft 441 at the bottom of the side rod 44 is inserted below the ground, and the side rod 44 itself is also partially inserted below the ground, until the hanging ears 3 are embedded between the panels 42, the connecting strip 5 is inserted into the connecting notch 31, and the bottom surface of the end plate 41 abuts against the upper end surface of the hanging ears 3;

[0041] S4. Repeat steps S2 and S3 to complete the installation of all Larsen steel sheet piles.

[0042] In summary, in the present application, at the connection of the adjacent hanging ears 3 of the Larsen steel sheet pile, the locking assembly 4 can be used to tighten and lock in multiple directions, and the insertion rod 43 and the side rod 44 cooperate with each other, so that the gap at the connection of the hanging ears 3 can be filled and positioned, ensuring that the hanging ears 3 drive the entire Larsen steel sheet pile to remain vertical. At the same time, the top of the hanging ears 3 are engaged with the insert plate 42, and the connecting strip 5 is engaged with the connecting slot 31, so that the hanging ears 3 are further ensured to be stable. Therefore, compared with the prior art, the present application has the advantages of improving the stability of the connection of the hanging ears 3 and the connection accuracy.

[0043] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An improved Larsen steel sheet pile, comprising a pile plate (1), side plates (2) connected to both sides of the pile plate (1), and hanging ears (3) fixed to both ends of the side plates (2), characterized in that: A locking assembly (4) is provided at the connection of adjacent hanging ears (3), and the locking assembly (4) comprises an end plate (41). Two groups of inlay plates (42) are fixedly provided on the lower surface of the end plate (41), and each group of inlay plates (42) comprises two inlay plates, and the two inlay plates (42) of each group are opposite to each other and are arranged in a spiral shape, so as to be used for embedding the hanging ears (3) between the two inlay plates (42). An elliptical insertion rod (43) is fixedly provided at the center position of the bottom of the end plate (41), and the insertion rod (43) is used for inserting the center position of the two groups of hanging ears (3) and abutting against the center side wall of the hanging ears (3).

2. The improved Larsen steel sheet pile according to claim 1, characterized in that: Side rods (44) fixed to the bottom surface of the end plate (41) are arranged on opposite sides of the insertion rod (43), and the two sides of the side rods (44) are arc-shaped and matched with the opposite side walls of two groups of different insert panels (42).

3. The improved Larsen steel sheet pile according to claim 2, characterized in that: A plurality of vertically arranged inserting-assisting shafts (441) are fixedly arranged at the bottom end of the side rod (44), and the distance from the top of the side rod (44) to the bottom of the inserting-assisting shaft (441) is less than the height of the side plate (2).

4. The improved Larsen steel sheet pile according to claim 1, characterized in that: The bottom of the insertion rod (43) is provided with a soil placement groove (431) penetrating vertically upwards.

5. The improved Larsen steel sheet pile according to claim 1, characterized in that: The end plate (41) is provided with an embedding groove (411) in the area between two embedding plates (42) in the same group, and the embedding groove (411) is used to embed with the end of the hanging ear (3).

6. The improved Larsen steel sheet pile according to claim 1, characterized in that: Horizontally facing connecting slots (31) are provided at the top ends of the center sections of the two groups of hanging ears (3), a connecting strip (5) is inserted transversely into the connecting slot (31), and a mounting groove (6) for embedding the connecting strip (5) is provided at the bottom center of the end plate (41).

7. The improved Larsen steel sheet pile according to claim 1, characterized in that: A semi-circular arc plate is fixedly provided at the connection position between the side plate (2) and the hanging ear (3), and the side of the semi-circular arc plate facing away from the surface of the side plate (2) is in an outwardly convex arc shape.

8. The improved Larsen steel sheet pile according to claim 1, characterized in that: The length of the insertion rod (43) is greater than the height of the side plate (2).

9. The improved Larsen steel sheet pile according to claim 6, characterized in that: The construction method includes the following steps: S1. Drive the first Larsen steel sheet pile into the ground at the predetermined position, leaving half of its height above the ground; S2, align the lug (3) of the new Larsen steel sheet pile with the lug (3) of the Larsen steel sheet pile that has been driven into the ground, and continue to drive the new Larsen steel sheet pile into the part below the ground, keeping the heights of the two groups of Larsen steel sheet piles flush; S3, adjusting the connection position of the hanging ears (3) of the two groups of Larsen steel sheet piles, and connecting the adjacent hanging ears (3) using the locking assembly (4); specifically, inserting the insertion rod (43) into the center position of the two groups of hanging ears (3) and inserting the bottom end of the insertion rod (43) below the ground until the hanging ears (3) are embedded between the panels (42), the connecting strip (5) is inserted into the connecting notch (31), and the bottom surface of the end plate (41) is in contact with the upper end surface of the hanging ears (3); S4. Repeat steps S2 and S3 to complete the installation of all Larsen steel sheet piles.

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