Grouting type steel pile tip structure for prestressed concrete hollow pile

Abstract

The utility model belongs to the technical field of steel pile tips, and particularly relates to a grouting type steel pile tip structure for a prestressed concrete hollow pile, which comprises a steel pile head arranged at the bottom of a hollow pile body, a butt joint square head matched with a square hole at the bottom of the hollow pile body is arranged at the top of the steel pile head, and fixed connection is realized through a threaded hole and a fastening bolt; the steel pile head is hollow, a mounting groove is formed in the conical surface, a swing rod is rotationally mounted in the mounting groove, a ground breaking conical surface is arranged on the surface of the swing rod, an arc plate extends from the top of the swing rod, and the arc plate is tightly attached to the sealing arc surface in the mounting groove to prevent muddy water from entering the steel pile head. The swing rod is unfolded and contracted through a control block and a connecting rod, the control block adjusts the height through a threaded rod, and a knob is arranged at the top of the threaded rod for operation. The pointed conical head is screwed at the bottom of the steel pile head, and the soil breaking efficiency is improved through the synergistic effect of the pointed conical head and the soil breaking conical surface.

Description

TECHNICAL FIELD

[0001] The utility model belongs to steel pile tip technical field, concretely relates to a grouting type steel pile tip structure for prestressed concrete hollow pile. BACKGROUND

[0002] Prestressed concrete hollow pile is widely used in construction engineering, which provides excellent bearing capacity and crack resistance by combining high-strength concrete and prestressed technology. However, in the construction process of prestressed concrete pile, the pile tip structure plays a crucial role in the sinking and stability of the pile body, especially in complex geological conditions, the pile tip needs to have multiple functions such as guiding, breaking soil, waterproofing, and preventing silt intrusion.

[0003] The commonly used steel pile tip in the prior art is mostly a fixed structure, which is usually difficult to adapt to variable geological conditions, mainly having the following problems:

[0004] 1. The steel pile tip and the steel pile are fixed by welding in the prior art, which may cause cuts to the workers during transportation due to the sharp steel pile tip.

[0005] 2. The common conical pile tip has insufficient stability when used to penetrate the soil, which is prone to deviation, resulting in the entire pile body being washed, affecting the use quality. INVENTION CONTENTS

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a grouting type steel pile tip structure for prestressed concrete hollow pile, which can effectively prevent the pile body from tilting and improve the soil breaking capacity through the expansion and contraction of the swing rod.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A grouting type steel pile tip structure for prestressed concrete hollow pile, comprising a steel pile head installed at the bottom of a hollow pile body, a square hole is formed in the center of the bottom of the hollow pile body, a horizontal through hole is symmetrically formed below the surface of the hollow pile body, a butt square head is provided at the top of the steel pile head, the butt square head is matched with the internal size of the square hole, a threaded hole is symmetrically formed on the surface of the butt square head, a fastening bolt is penetrated through the horizontal through hole, the end of the fastening bolt is matched with the internal size of the threaded hole, the other end of the fastening bolt is flush with the outer surface of the hollow pile body, a mounting groove is symmetrically formed on the conical surface of the steel pile head, the steel pile head is hollow inside, the two mounting grooves are communicated with the internal cavity of the steel pile head, a swing rod is rotatably installed inside the mounting groove, a sealing camber is provided above the mounting groove, the sealing camber is concentric with the rotation shaft of the swing rod, an arc plate is inwardly extended on one side of the top of the two swing rods, the arc plate is tightly attached to the sealing camber, and a limiting protrusion is arranged on one end of the arc plate.

[0009] Further, the limiting convex stripes limit the maximum inclination angle of the swing rods.

[0010] Further, a threaded rod is vertically rotatably arranged in the center of the steel pile head, penetrates the butt square head, and is provided with a knob at the top end.

[0011] Further, a control block is screwed on the surface of the threaded rod, two connecting rods are symmetrically hinged on the two sides of the control block, and the ends, away from the control block, of the two connecting rods are hinged on the inner walls of the two swing rods.

[0012] Further, a soil breaking conical surface is arranged on the side surface, away from each other, of the swing rods, and the soil breaking conical surface is a sharp surface that protrudes outward from the center.

[0013] Further, a sharp conical head is screwingly arranged at the bottom of the steel pile head, and the sharp conical head is flush with the outer conical surface of the steel pile head.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a steel pile head and hollow pile body are stably connected through the cooperation of the transverse through hole and the fastening bolt.

[0016] The installation groove of the steel pile head conical surface and the cooperation design of the swing rod and the sealing arc surface make the swing rod provide guidance and support for the pile body when unfolding, avoid the inclination phenomenon in the process of the pile body entering the earth, the close cooperation of the sealing arc surface and the arc plate can prevent external mud from entering the inside of the steel pile head when the swing rod moves, effectively solve the problem of insufficient waterproof performance in the prior art, improve the adaptability of the steel pile sharp structure under complex geological conditions, and prolong the service life of the device.

[0017] The linkage design of the threaded rod, the control block and the connecting rod makes the height adjustment of the control block drive the contraction and unfolding of the swing rod, and the flexible adjustment mode not only meets the storage requirement of the swing rod in the transportation process and avoids that the protruding part causes harm to the workers, but also can quickly unfold the swing rod in the use process to enhance the soil breaking capacity, and solve the problem that the swing rod lacks the adjustment function in the prior art and safety hazards easily occur in the transportation and construction. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an installation three-dimensional structure schematic view of the utility model;

[0019] Figure 2The utility model discloses a pile body and steel pile head according to sectional structure schematic view.

[0020] Figure 3 The utility model discloses a pile body and steel pile head sectional solid structure schematic view.

[0021] Figure 4 The utility model discloses a steel pile head and butt joint square head structure schematic view.

[0022] Figure 5 The utility model discloses a swing rod solid structure schematic view.

[0023] In the drawing, the component list that each sign represents is as follows:

[0024] 1, hollow pile body;11, square hole;12, horizontal through hole;2, fastening bolt;3, steel pile head;31, butt joint square head;32, screw hole;33, installation groove;34, sealing camber;4, sharp cone head;5, threaded rod;6, control block;7, connecting rod;8, swing rod;81, arc plate;82, limit convex strip;83, soil breaking cone surface. Specific implementation

[0025] In order to make the purpose and the advantage of the utility model more clearly clear, the following is specifically explained to the utility model with example. It should be understood that the following text is only used to describe one or several specific implementation modes of the utility model, and does not strictly limit the protection scope of the utility model specifically requested.

[0026] Reference Figures 1-5 As shown in the figure, a kind of grouting type steel pile tip structure for prestressed concrete hollow pile, including the steel pile head 3 of installation in hollow pile body 1 bottom, square hole 11 is set up in the bottom center of hollow pile body 1, symmetrically set up horizontal through hole 12 in the surface lower side of hollow pile body 1, hollow pile body 1 is accurately connected with steel pile head 3 by square hole 11;Steel pile head 3 top is provided with butt joint square head 31, butt joint square head 31 and square hole 11 internal size are adapted, can ensure that the both close fitting;Symmetrically set up screw hole 32 on the surface of butt joint square head 31, screw hole 32 corresponds with the horizontal through hole 12 of hollow pile body 1, to insert fastening bolt 2;Fastening bolt 2 end and screw hole 32 internal size are adapted, firmly connected by screwing structure, fastening bolt 2 other end is flush with the outer surface of hollow pile body 1, guarantee the stability and aesthetic property of overall structure;Steel pile head 3 cone surface symmetrically set up installation groove 33, installation groove 33 and steel pile head 3 internal cavity are connected, and the installation and internal adjustment of component are facilitated;Steel pile head 3 is hollow, provides space support for the flexible arrangement of other internal components.

[0027] Reference Figure 3 And Figure 5As shown, the inside lower part of the mounting groove 33 is rotatably mounted with the swing rod 8, which is movably connected with the mounting groove 33 through the rotating shaft; the two ends of the swing rod 8 are arranged at opposite positions of the mounting groove 33, and are designed to exceed the outer side of the steel pile head 3 when swinging, thereby playing a guiding and supporting role; the inside upper part of the mounting groove 33 is provided with a sealing camber 34, which is concentric with the rotating shaft of the swing rod 8; the side of the top of each swing rod 8 close to each other extends inwardly with an arc plate 81, which is closely attached to the sealing camber 34, thereby further enhancing the waterproof effect and improving the stability of the rotation of the swing rod 8; the end of the arc plate 81 close to each other is provided with a limiting convex strip 82, which limits the maximum inclination angle of the swing rod 8, thereby avoiding damage to the swing rod 8 caused by excessive rotation.

[0028] Referring to Figure 2 and Figure 3 As shown, the inside center of the steel pile head 3 is vertically rotatably mounted with a threaded rod 5, which penetrates the butt head 31 and is rotatably connected with the butt head 31 through threads, thereby achieving flexible adjustment of the height; the top end of the threaded rod 5 is provided with a knob, which is convenient for the operator to quickly adjust during construction; the surface of the threaded rod 5 is rotatably connected with a control block 6, which can move along the axial direction of the threaded rod 5, thereby indirectly controlling the swing rod 8 by changing the position; the two sides of the control block 6 are symmetrically hinged with connecting rods 7, the ends of the two connecting rods 7 away from the control block 6 are hingedly connected to the inner walls of the two swing rods 8, and the connecting rods 7 drive the rotation of the swing rods 8 through the up-and-down movement of the control block 6, thereby completing the transition of the swing rods 8 from the retracted state to the expanded state.

[0029] Referring to Figure 4 and Figure 5 As shown, the side surface of the swing rod 8 away from each other is provided with a soil breaking cone surface 83, which is a sharp surface protruding outwardly from the center, and the soil breaking cone surface 83 effectively improves the soil breaking capacity of the steel pile head 3 through the sharp design, thereby significantly reducing the construction difficulty under hard geological conditions.

[0030] Referring to Figure 1 and Figure 2 As shown, the bottom of the steel pile head 3 is rotatably connected with a sharp cone head 4, which is flush with the outer cone surface of the steel pile head 3, and the sharp cone head 4 is fixed to the bottom of the steel pile head 3 through the thread structure, thereby ensuring that it will not loosen during construction; the sharp shape of the sharp cone head 4 further enhances the soil entering effect of the steel pile head 3, and at the same time forms a synergistic effect with the soil breaking cone surface 83, thereby improving the overall construction efficiency and precision.

[0031] The working principle of the utility model is: first, screw the pointed cone head 4 on the internal screw hole inside the steel pile head 3, and make the pointed cone head 4 flush with the conical surface of the steel pile head 3, then insert the butt joint square head 31 into the square hole 11, make the upper surface of the steel pile head 3 tightly adhere to the lower surface of the hollow pile body 1, at this time, the screw hole 32 corresponds to the horizontal through hole 12, respectively insert two fastening bolts 2, and make the end part screw into the screw hole 32, at this time, the steel pile head 3 and the hollow pile body 1 keep fixed.

[0032] Before the steel pile head 3 and the hollow pile body 1 are fixed, the height of the control block 6 can be adjusted by rotating the screw rod 5 according to the use environment, then the two swing rods 8 are driven to turn outwards by the two connecting rods 7, make the swing rod 8 rotate outwards along the bottom rotating shaft, the swing rod 8 exceeds the outer surface of the steel pile head 3, the close cooperation of the arc plate 81 and the sealing arc surface 34 can prevent the external mud from entering the inside of the steel pile head 3 in the process of not affecting the rotation of the swing rod 8, the limiting convex strip 82 limits the maximum outward rotation angle of the swing rod 8, the swing rod 8 protruding on both sides can effectively guide the steel pile head 3, prevent the inclination when entering the soil, the surface of the soil breaking conical surface 83 can improve the soil breaking effect, in the transportation process, the swing rod 8 can be retracted into the inside of the steel pile head 3, to prevent the protruding sharp from scratching the workers.

[0033] The above only is the preferred implementation mode of the utility model, it should be pointed out that, for ordinary skilled person in the art, on the premise of not departing from the principle of the utility model, still can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model. The structure, device and operation method not specifically described and explained in the utility model, if no special description and limitation, are implemented according to the conventional means in the field.

Claims

1. A groutable steel pile tip structure for prestressed concrete hollow piles, comprising a steel pile head (3) mounted at the bottom of a hollow pile body (1), characterized in that: The bottom center of the hollow pile body (1) is provided with a square hole (11), the surface of the hollow pile body (1) is symmetrically provided with a horizontal through hole (12) below, the top of the steel pile head (3) is provided with a butt square head (31), the butt square head (31) is matched with the inner size of the square hole (11), the surface of the butt square head (31) is symmetrically provided with a threaded hole (32), the horizontal through hole (12) is penetrated by a fastening bolt (2), the end of the fastening bolt (2) is matched with the inner size of the threaded hole (32), the other end of the fastening bolt (2) is flush with the outer surface of the hollow pile body (1), the steel pile head (3) is symmetrically provided with a mounting groove (33) on the conical surface, the steel pile head (3) is hollow, the two mounting grooves (33) are communicated with the inner cavity of the steel pile head (3), the mounting groove (33) is rotatably installed with a swing rod (8) below, the mounting groove (33) is provided with a sealing camber (34) above, the sealing camber (34) is concentric with the rotation shaft of the swing rod (8), the top of the two swing rods (8) is inwardly extended with an arc plate (81) on one side close to each other, the arc plate (81) is closely attached to the sealing camber (34), and the arc plate (81) is provided with a limiting convex strip (82) on one end close to each other.

2. The groutable steel pile point structure for a prestressed concrete hollow pile according to claim 1, characterized in that: The limiting convex strip (82) limits the maximum inclination angle of the swing rod (8).

3. The groutable steel pile point structure for a prestressed concrete hollow pile according to claim 1, characterized in that: The steel pile head (3) is vertically rotatably installed with a threaded rod (5) at the center, the threaded rod (5) penetrates the butt square head (31), and the top end of the threaded rod (5) is provided with a knob.

4. The groutable steel pile point structure for a prestressed concrete hollow pile according to claim 3, characterized in that: The surface of the threaded rod (5) is screwed with a control block (6), the control block (6) is symmetrically hinged with a connecting rod (7) on both sides, and one end of the two connecting rods (7) away from the control block (6) is hinged to the inner wall of the two swing rods (8).

5. The groutable steel pile point structure for a prestressed concrete hollow pile according to claim 1, characterized in that: The surface of the swing rod (8) away from each other is provided with a soil breaking conical surface (83), and the soil breaking conical surface (83) is a sharp surface protruding outward from the center.

6. The groutable steel pile point structure for a prestressed concrete hollow pile according to claim 1, characterized in that: The steel pile head (3) is rotatably installed with a sharp conical head (4) at the bottom, and the sharp conical head (4) is flush with the outer conical surface of the steel pile head (3).

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