Expanded plate type steel pipe pile

Abstract

The utility model discloses an expanded plate type steel pipe pile which comprises a pile pipe, a guide head is arranged at the bottom of the pile pipe, and a transverse pin hole is formed in the pile pipe above the guide head; the pile pipe is sleeved with the bottom cross rod through the first lantern rings, the two ends of the bottom cross rod are each provided with a first inclined rod, the tops of the two first inclined rods are connected to the two sides of the second lantern rings above to form a triangular support, and the pile pipe is sleeved with the triangular support through the first lantern rings and the second lantern rings; one end of the expansion plate is hinged to the pile pipe below the bottom cross rod through a hinge and is supported by a triangular support, and the other end of the expansion plate is provided with an insertion rod embedded into the transverse pin hole; connecting hooks are also arranged on the side surfaces; one end of the chain block is connected with the connecting hook, and the other end is connected with the lifting beam above the pile pipe. According to the device, after a pile pipe penetrates into silt and soft soil geology, the expansion plate is pulled from a vertical state to a horizontal state by utilizing the chain block, so that the contact area between the expansion plate and silt in the horizontal direction is increased, the penetration depth requirement of a pile foundation is reduced, and the construction difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the field of steel pipe pile construction, and particularly relates to an enlarged plate type steel pipe pile. Background Art

[0002] In foundation construction, steel pipe piles can be selected as the main vertical load-bearing support members. The construction of steel pipe piles is convenient and fast, and the pollution to the environment is also relatively low. Moreover, as the support members of the foundation, steel pipe piles also have high bearing capacity.

[0003] After the steel pipe pile is inserted into the soil layer, it is often fixed only by the soil's tightness against the steel pipe pile, and the friction force is used to limit the steel pipe pile from leaving the soil layer upward. However, in geological conditions with thick silt layers and soft soil layers, generally, the steel pipe pile needs to reach more than 30 meters to more than 40 meters to meet the force requirements, resulting in high construction costs, long construction periods, and problems such as long steel pipe pile lengths, high requirements for pile sinking accuracy, and great construction difficulties.

[0004] Therefore, an enlarged plate type steel pipe pile is proposed to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an enlarged plate type steel pipe pile to solve the problems that in geological conditions with thick silt and soft soil layers, a large pile sinking depth is required to meet the force requirements, resulting in high requirements for pile sinking accuracy and great construction difficulties.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is as follows: An enlarged plate type steel pipe pile, comprising:

[0007] A pile pipe, with a transverse pin hole opened at the lower part and a guide head at the bottom;

[0008] A bottom cross bar, sleeved on the pile pipe through a first collar, with a first inclined bar provided at each end. The tops of the two first inclined bars are respectively connected to both sides of the upper second collar to form a triangular brace, and the triangular brace is sleeved on the pile pipe through the first collar and the second collar;

[0009] An enlarged plate, one end of which is hinged to the pile pipe below the bottom cross bar through a hinge and supported by the triangular brace, and the other end is provided with an insertion rod inserted into the transverse pin hole; a connecting hook is also provided on the side of the enlarged plate;

[0010] A chain hoist, one end of which is connected to the connecting hook, and the other end is connected to the lifting beam above the pile pipe.

[0011] Particularly, they are respectively arranged on both sides of the pile pipe.

[0012] Particularly, the enlarged plate is a triangular plate with the sharp angle facing outwards.

[0013] Specifically, a number of transverse screw holes are formed in the side wall of the collar, and fastening bolts inserted into the pile pipe are screwed into the transverse screw holes.

[0014] Specifically, a stop block is further provided on the lower surface of the triangular brace.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects: after the pile pipe is penetrated into the silt and soft soil layers, the lifting beam is connected to the chain block, and then the external lifting device is used to pull the lifting beam upward, so that the expansion plate is pulled from the vertical state to the horizontal state by the chain block, thereby increasing the contact area between the expansion plate and the silt in the horizontal direction, increasing the bonding force between the pile pipe and the soil layer and the bearing capacity of the pile pipe, improving the stability of the pile pipe, effectively reducing the penetration depth requirement of the pile foundation, and reducing the construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the pile sinking state of the device of the utility model.

[0017] Figure 2 It is a side view structural schematic diagram of the pile sinking state of the device of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the expanded state of the device of the utility model.

[0019] The interpretations of each label in the figure are as follows: pile pipe - 1; guide head - 2; transverse pin hole - 3; bottom cross bar - 4; first diagonal bar - 5; first collar - 6; second collar - 7; expansion plate - 8; insertion rod - 9; connecting hook - 10; chain block - 11; lifting beam - 12; transverse screw hole - 13; stop block - 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model, so as to have a further understanding of the concept, the technical problems solved, the technical features constituting the technical solutions, and the technical effects brought by the present utility model.

[0021] As Figures 1 to 3 shown, an expanded plate type steel pipe pile includes:

[0022] A pile pipe 1, with a transverse pin hole 3 opened in the lower part and a guide head 2 at the bottom;

[0023] A bottom cross bar 4, sleeved on the pile pipe 1 through a first collar 6, with a first diagonal bar 5 provided at each end, and the tops of the two first diagonal bars 5 are respectively connected to both sides of the upper second collar 7 to form a triangular brace, and the triangular brace is sleeved on the pile pipe 1 through the first collar 6 and the second collar 7;

[0024] The expansion plate 8 has one end hinged to the pile pipe 1 below the bottom cross bar 4 through a hinge and is supported by a triangular brace, and the other end is provided with a plug rod 9 inserted into the transverse pin hole 3; a connecting hook 10 is further provided on the side surface of the expansion plate 8;

[0025] The chain hoist 11 has one end connected to the connecting hook 10 and the other end connected to the lifting beam 12 above the pile pipe 1.

[0026] In the present utility model, its main working process is as follows: In the initial state, the expansion plate 8 is directly inserted into the transverse pin hole 3 on the pile pipe 1 through the plug rod 9, so as to facilitate reducing the resistance exerted on the expansion plate 8 by the silt layer or soft soil layer during the pile driving construction, and facilitating the normal pile driving construction. After the pile is driven to the required depth, by maintaining the force applied to the pile pipe 1, the lifting beam 12 is lifted upward by using an external hoisting device, so that the chain hoist 11 connected to the lifting beam 12 rises together, and then drives the expansion plate 8 to rotate around the hinge, changing from the vertical state to being pulled to the horizontal state and using the upper surface of the expansion plate 8 to tightly abut against the bottom cross bar 4 of the triangular brace to maintain the unfolded state of the expansion plate 8, so as to maintain the maximum contact area with the soil layer. At this time, the lifting beam 12 is fixed by setting a cushion block or other structures to prevent the chain hoist 11 from loosening and causing the expansion plate 8 to fall back. It should be noted in this process that the expansion plate 8 in the initial state is not in the vertical state, but the lower half is inclined towards the pile pipe 1, so that the expansion plate 8 is always subjected to the acting force exerted by the soil layer towards the pile pipe 1 during the pile driving process, thereby avoiding the problem that the expansion plate 8 is prematurely opened due to the acting force of the soil layer during the pile driving process. When the pile foundation needs to be demolished, after other steel trestle components above the pile foundation are demolished first, the fixed state of the lifting beam 12 is released, the chain hoist 11 is removed, and then the pile pipe 1 is pulled out by using a crawler crane vibratory hammer.

[0027] As a preferred embodiment, two expansion plates 8 are provided and are respectively arranged on both sides of the pile pipe 1.

[0028] In this embodiment, by setting the expansion plates 8 to be two symmetrical ones, the contact area between the pile pipe 1 and the soil layer is further increased, the stability of the pile pipe 1 in the soil layer is further increased, the penetration depth is reduced, and the construction difficulty is reduced.

[0029] As a preferred embodiment, the expansion plate 8 is a triangular plate with the sharp angle facing outwards.

[0030] In this embodiment, by setting the expansion plate 8 as a triangular plate with the sharp angle facing outwards, it is convenient to break the soil layer below by using the sharp angle during the pile driving process, which is beneficial to cooperate with the pile driving construction.

[0031] As a preferred embodiment, a plurality of transverse screw holes 13 are opened on the side walls of the first collar 6 and the second collar 7, and fastening bolts inserted into the pile pipe 1 are screwed into the transverse screw holes 13.

[0032] In this embodiment, by opening transverse screw holes 13 on the side walls of the first collar 6 and the second collar 7 and inserting fastening bolts into the corresponding openings of the pile pipe 1, the rapid installation and disassembly of the first collar 6, the second collar 7 and the triangular brace as a whole are completed, and at the same time, the stability of the triangular brace as a whole during the pile driving process is ensured.

[0033] As a preferred embodiment, a stop block 14 is further provided on the lower surface of the triangular brace.

[0034] In this embodiment, by providing a stop block 14 on the lower surface of the triangular brace, the expansion plate 8 is not in a truly horizontal state in the unfolded state, but in an inclined state with the outer end slightly lower, so as to apply a force to the lower soil layer to converge towards the pile pipe 1, so as to increase the bonding force between the expansion plate 8 and the soil layer, and prevent the silt soil layer or soft soil layer in the horizontal state from directly leaving the range of the expansion plate 8 under the expansion plate 8 in the horizontal state.

[0035] The "connection" and "fixation" mentioned in the description of the present invention can be fixed connection, machining, welding, or mechanical connection. The specific meanings of the above terms in the present invention should be understood according to the specific circumstances.

[0036] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An expanded plate type steel pipe pile, characterized in that: include: A pile pipe (1) having a transverse pin hole (3) at the bottom and a guide head (2) at the bottom; A bottom cross bar (4) is sleeved on the pile pipe (1) through a first sleeve ring (6), and a first oblique bar (5) is provided at each end. The tops of the two first oblique bars (5) are respectively connected to the two sides of the second sleeve ring (7) above to form a triangular support, and the triangular support is sleeved on the pile pipe (1) through the first sleeve ring (6) and the second sleeve ring (7); An expansion plate (8) is hinged at one end to the lower surface of the bottom cross bar (4) through a hinge and supported by a triangular support, and the other end is provided with an insertion rod (9) embedded in the transverse pin hole (3), and a connecting hook (10) is also provided on the side; A fall chain (11) has one end connected to the connecting hook (10) and the other end connected to the lifting beam (12) above the pile pipe (1).

2. The enlarged plate type steel pipe pile according to claim 1, characterized in that: Two expansion plates (8) are provided, and are respectively arranged on both sides of the pile pipe (1).

3. The enlarged plate type steel pipe pile according to claim 1, characterized in that: The enlarged plate (8) is a triangular plate with its sharp corners facing outwards.

4. The enlarged plate type steel pipe pile according to claim 1, characterized in that: The side wall of the collar is provided with a plurality of transverse screw holes (13), and fastening bolts inserted into the pile pipe (1) are screwed into the transverse screw holes (13).

5. The enlarged plate type steel pipe pile according to claim 1, characterized in that: A stopper (14) is also provided on the lower surface of the triangular support.

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