Separable rock-socketed uplift pile

Abstract

The invention belongs to the technical field of civil engineering and buildings, and particularly relates to a separable rock-socketed uplift pile. According to the separable rock-socketed uplift pile provided by the invention, by arranging the outer pipe unit and the pluggable drill rod unit, the outer pipe unit adopts a tubular structure and is connected with the pluggable drill rod unit in an inserted manner, so that the pluggable drill rod unit can be pulled out after driving the outer pipe unit to be embedded into a rock stratum; the outer pipe unit is reserved in a soil layer and a rock layer to serve as an uplift pile to be used, the pulled-out pluggable drill rod unit can be repeatedly used, practicability is higher, and the construction cost and the structure utilization rate are reduced. In addition, when the pull-plug type drill rod unit drives the outer pipe unit to move downwards through hammering, the outer pipe unit can protect the pull-plug type drill rod unit used for damaging the rock stratum in the outer pipe unit to a certain extent, the service life of the pull-plug type drill rod unit is prolonged, and the rock-socketed pile body can be embedded into the rock stratum more easily.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering and construction, and in particular relates to a detachable rock-embedded anti-pullout pile. Background Art

[0002] Pull-out piles are a support system used in deep foundation pit projects. When the underground structure of a construction project is lower than the surrounding soil water level, piles are driven to offset the buoyancy of the structure caused by water in the soil. Its main mechanism of action is to rely on the friction between the pile body and the soil layer to resist axial tension. Pull-out piles are widely used in large basement anti-floating, high-rise building (structure) anti-pullout, offshore dock platform anti-pullout, suspension bridge and cable-stayed bridge anchor pile foundation, large dock bottom plate pile foundation and static load test pile anchor pile foundation.

[0003] Common types of pull-out piles include bored cast-in-place piles, prefabricated square piles and prestressed pipe piles. Existing pull-out piles mainly include a pile body and a pile end for destroying bedrock.

[0004] For example, a Chinese utility model patent with patent publication number CN219973162U and publication date 2023.11.07 discloses a pull-out pile, whose structure includes a pile body, which is a hollow structure with an open upper end, and a plurality of groups of pull-out parts are arranged in the pile body along its longitudinal direction, and the pull-out parts include a limiting portion, and a plurality of protruding portions are arranged at intervals on the limiting portion of the pull-out part; a through hole matching the protruding portion of the anti-pull part is arranged on the side wall of the pile body, and an expansion part is arranged in the space formed by the limiting portion in the pile body, and the protruding portion of the anti-pull part can be pushed out of the through hole when the expansion part expands.

[0005] The general structural principle of the pull-out pile in the utility model patent is as follows: when the pull-out pile is pre-buried, the pile body of the pull-out pile is first inserted into the foundation, and then the pull-out parts in the four directions of the pile body are placed in sequence, and the limiting part of the pull-out part is inserted into the sliding groove of the limiting part to stabilize it in the pile body, and the protruding part of the pull-out part is aligned with the through hole, and an air bag is placed between the pull-out parts in four directions. At this time, the pull-out part above the pile body is installed above the pull-out part to cooperate with the sliding part of the limiting part to stabilize the pull-out part in the pile body, and then the inflation valve on the air bag is connected to the air pump, and the air bag is inflated after confirmation. After the air bag expands, it will squeeze the limiting part of the pull-out part, and at the same time, it will press the protruding part of the pull-out part into the foundation, and then the air bag is deflated and pulled out, and then high-strength concrete is poured into the pile body to complete the pre-buried pull-out pile.

[0006] However, the rock-embedded anti-pullout pile still has at least the following deficiencies in actual use, in other words, these are the technical problems to be solved by the present invention.

[0007] The insertion structure is directly arranged on the pile body, so it can only be buried in the rock layer and cannot be recycled.

[0008] Therefore, in summary, there is an urgent need for a new type of rock-embedded anti-pullout pile with a recyclable inserted part. Summary of the invention

[0009] The present invention provides a separable rock-embedded anti-pullout pile, which can be arranged in a manner of an outer tube unit and a plug-in drill rod unit, so that: the outer tube unit adopts a tubular structure and is plugged with the plug-in drill rod unit, so that the plug-in drill rod unit drives the outer tube unit to be embedded in the rock layer and then can be pulled out, the outer tube unit remains in the soil layer and the rock layer for practical use as an anti-pullout pile, and the pulled-out plug-in drill rod unit can be reused, so the practicability is stronger, and the construction cost and structure utilization rate are reduced; in addition, when the plug-in drill rod unit drives the outer tube unit to move downward by hammering, the outer tube unit can protect the plug-in drill rod unit used for destroying the rock layer inside the outer tube unit to a certain extent, thereby extending the service life of the plug-in drill rod unit and making it easier for the rock-embedded pile body to be embedded in the rock layer.

[0010] The technical solution adopted by the present invention to solve the above problem is: a detachable rock-embedded anti-pullout pile, the structure of which includes an outer tube unit and a plug-in drill rod unit arranged in the outer tube unit and used to push the outer tube unit.

[0011] A further preferred technical solution is that the outer tube unit includes a tube body, and a barbed steel plate which is obliquely arranged along the length direction of the tube body and is used to restrict the upward displacement of the tube body.

[0012] A further preferred technical solution is that the plug-in drill rod unit comprises a rock breaking drill rod inserted into the tube body, and a pushing ring arranged on the upper end of the rock breaking drill rod and used to push the tube body to move downward.

[0013] A further preferred technical solution is that: the outer tube unit further includes a top plate arranged on the top end of the tube body.

[0014] A further preferred technical solution is that: the outer tube unit further comprises a guide hole arranged on the top plate; and the plug-in drill rod unit further comprises a guide rod arranged on the lower end of the push ring and used for inserting into the guide hole.

[0015] A further preferred technical solution is that the plug-in drill rod unit further comprises a conical wear-resistant shell sleeved on the insertion tip of the rock breaking drill rod.

[0016] A further preferred technical solution is that the plug-in drill rod unit also includes a plug-in block arranged on the annular end face of the conical wear-resistant shell; the outer tube unit also includes a slot arranged on the insertion end face of the tube body and used to insert and position the tube body on the soil layer by inserting the plug-in block.

[0017] A further preferred technical solution is that: the outer tube unit further includes a top plate reinforcement plate which is arranged on the tube body and is used to support the top plate.

[0018] A further preferred technical solution is that the plug-in drill rod unit further includes a tensile plate which is arranged on the rock breaking drill rod and is used for obliquely pulling the push ring.

[0019] A further preferred technical solution is that the outer tube unit further includes an arc-shaped fixing groove provided on the barbed steel plate and used for connecting the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the position structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the position structure of the outer tube unit in the present invention.

[0022] Figure 3 It is a structural schematic diagram of the plug-in drill rod unit in the present invention.

[0023] Figure 4 It is a partial connection schematic diagram of the outer tube unit and the plug-in drill rod unit in the present invention.

[0024] Figure 5 It is a partial structural diagram of the plug-in drill rod unit in the present invention.

[0025] Figure 6 It is a partial connection schematic diagram of the lower end of the outer pipe unit in the present invention.

[0026] Figure 7 It is a schematic diagram of the connection between the tube body and the barbed steel plate in the present invention from a top view.

[0027] In the figure, the meanings of the symbols are as follows: Soil layer a, rock layer b Outer tube unit 1, plug-in drill rod unit 2; The pipe body 101 , the barbed steel plate 102 , the top plate 103 , the guide hole 104 , the slot 105 , the top plate reinforcement plate 106 , the arc-shaped fixing groove 107 , the rock breaking drill rod 201 , the push ring 202 , the guide rod 203 , the conical wear-resistant shell 204 , the plug-in block 205 , and the tensile plate 206 . DETAILED DESCRIPTION

[0028] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0029] As attached Figure 1-7As shown, a detachable rock-embedded anti-pullout pile comprises an outer tube unit 1 and a plug-in drill rod unit 2 which is arranged in the outer tube unit 1 and is used to push the outer tube unit 1 .

[0030] In this embodiment, the outer tube unit 1 is a hollow tubular structure, usually a round steel tube. The outer tube unit 1 is finally left in the soil layer a and the rock layer b, and the outer tube unit 1 can be used to protect the plug-in drill rod unit 2 during the embedding process.

[0031] In addition, the plug-in drill rod unit 2 functions to destroy the soil layer a and the rock layer b using the tip portion, thereby pushing the outer tube unit 1 to break the rock and soil and embed into the soil layer a and the rock layer b.

[0032] Finally. When piling, place the outer tube unit 1, insert the plug-in drill rod unit 2 into the outer tube unit 1, the length / depth of the plug-in drill rod unit 2 is longer than that of the outer tube unit 1, and the vibrating hammer first impacts the plug-in drill rod unit 2, so that the tip of the plug-in drill rod unit 2 breaks the rock and soil first, and drives the outer tube unit 1 to move down into the broken rock body, so that the outer tube unit 1 is embedded in the soil layer a and the rock layer b. After the plug-in drill rod unit 2 completely embeds the outer tube unit 1 into the soil layer a and the rock layer b, the plug-in drill rod unit 2 is pulled out of the outer tube unit 1, so that the outer tube unit 1 remains in the soil layer a and the rock layer b as an anti-pullout pile, and the plug-in drill rod unit 2 can be put into the next anti-pullout pile for breaking the ground and recycling, with low cost and high use recycling rate. It is usually necessary to pour concrete into the outer tube unit 1 or place a steel cage to form a strong anti-pullout pile.

[0033] The outer tube unit 1 includes a tube body 101 and a barbed steel plate 102 which is arranged obliquely along the length direction of the tube body 101 and is used to restrict the tube body 101 from moving upward.

[0034] In this embodiment, the tube body 101 is a main structure retained in the soil layer a and the rock layer b. The tube body 101 can be used to insert the plug-in drill rod unit 2. The barbed steel plate 102 is arranged at the side end of the tube body 101 and is inclined along the length direction of the tube body 101, so that the barbed steel plate 102 is easy to embed downward, but is blocked when being pulled upward, thereby achieving an anti-pullout effect. The barbed steel plate 102 can be inserted into the tube body 101 and then extended, or it can be directly welded to the side wall of the tube body 101.

[0035] The plug-in drill rod unit 2 includes a rock-breaking drill rod 201 inserted into the tube body 101, and a pushing ring 202 disposed on the upper end of the rock-breaking drill rod 201 and used to push the tube body 101 to move downward.

[0036] In this embodiment, the upper end of the rock-breaking drill rod 201 is flat, and the lower end is a pointed cone with a certain rock-breaking strength, so that the rock-breaking drill rod 201 is convenient for breaking the soil layer a and the rock layer b. The cross-sections of the rock-breaking drill rod 201 and the tube body 101 are usually circular, and square tubes or other shapes may also be used according to construction requirements. The push ring 202 is arranged on the rock-breaking drill rod 201 near the upper end, and is used to support the tube body 101 to prevent the rock-breaking drill rod 201 from falling while the tube body 101 does not move when the rock-breaking drill rod 201 is hammered. The push ring 202 can drive the tube body 101 to fall together.

[0037] The outer tube unit 1 further includes a top plate 103 disposed on the top end of the tube body 101 .

[0038] In this embodiment, the top plate 103 is disposed at the top of the tube body 101. When the push ring 202 moves downward, it must first contact the top plate 103, thereby driving the tube body 101 to move downward. The top plate 103 allows the force of the push ring 202 to be applied to the tube body 101 more evenly.

[0039] The outer tube unit 1 further includes a guide hole 104 disposed on the top plate 103 ; the plug-in drill rod unit 2 further includes a guide rod 203 disposed on the lower end of the push ring 202 and used for inserting into the guide hole 104 .

[0040] In this embodiment, the guide hole 104 is arranged corresponding to the guide rod 203, so as to achieve a positioning effect, so that when the rock breaking drill rod 201 moves downward, it can better drive the tube body 101 to move downward, reduce the angle or force offset between the two, and improve the rock breaking effect.

[0041] The plug-in drill rod unit 2 further includes a conical wear-resistant shell 204 sleeved on the insertion tip of the rock-breaking drill rod 201 .

[0042] In this embodiment, the conical wear-resistant shell 204 is used to protect the rock breaking drill rod 201 and increase the rock breaking effect of the rock breaking drill rod 201 .

[0043] The plug-in drill rod unit 2 also includes a plug-in block 205 arranged on the annular end face of the conical wear-resistant shell 204; the outer tube unit 1 also includes a slot 105 arranged on the insertion end face of the tube body 101 and used to insert and position the tube body 101 on the soil layer a by inserting the plug-in block 205.

[0044] In this embodiment, the plug-in block 205 is arranged in cooperation with the slot 105. In the early stage of rock breaking, the plug-in block 205 is plugged into the slot 105, so that the outer tube unit 1 can be hammered and the conical wear-resistant shell 204 can be used for preliminary rock breaking, thereby driving the tube body 101 to first be partially embedded into the soil layer a. This not only reduces the rock breaking difficulty of the rock breaking drill rod 201, but also when the rock breaking drill rod 201 is inserted into the tube body 101 that is partially located in the soil layer a, there is no need for other structures to support the tube body 101, the tube body 101 will not fall easily, and the stability is better. After the rock-breaking drill rod 201 is inserted into the tube body 101, it is in close contact with the conical wear-resistant shell 204. When the rock is broken by hammering downward, the plug-in block 205 is driven to separate from the slot 105, so that the conical wear-resistant shell 204 mainly protects and enhances the rock-breaking drill rod 201, and when the rock-breaking drill rod 201 is pulled out of the tube body 101, the conical wear-resistant shell 204 remains in the rock layer b.

[0045] The outer tube unit 1 further includes a top plate reinforcing plate 106 disposed on the tube body 101 and used for supporting the top plate 103 .

[0046] In this embodiment, the top plate reinforcement plate 106 serves to increase the structural strength of the tube body 101 and the top plate 103 .

[0047] The plug-in drill rod unit 2 further includes a tension plate 206 which is arranged on the rock breaking drill rod 201 and is used for obliquely pulling the push ring 202 .

[0048] In this embodiment, the tensile plate 206 serves to increase the structural strength of the rock breaking drill rod 201 and the push ring 202 .

[0049] The outer tube unit 1 further includes an arc-shaped fixing groove 107 disposed on the barbed steel plate 102 and used for connecting the tube body 101 .

[0050] In this embodiment, the arc-shaped fixing groove 107 serves to facilitate the fitting and welding of the barbed steel plate 102 and the tube body 101 , thereby increasing the tensile strength of the tube body 101 .

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A separable rock-embedded anti-pullout pile, characterized in that: The structure comprises an outer tube unit (1), and a plug-in drill rod unit (2) which is arranged in the outer tube unit (1) and is used to push the outer tube unit (1).

2. A detachable rock-embedded anti-pullout pile according to claim 1, characterized in that: The outer tube unit (1) comprises a tube body (101), and a barbed steel plate (102) arranged obliquely along the length direction of the tube body (101) and used to restrict the tube body (101) from moving upward.

3. The detachable rock-embedded anti-pullout pile according to claim 2, characterized in that: The plug-in drill rod unit (2) comprises a rock-breaking drill rod (201) inserted into the tube body (101), and a pushing ring (202) arranged on the upper end of the rock-breaking drill rod (201) and used to push the tube body (101) to move downward.

4. The detachable rock-embedded anti-pullout pile according to claim 3, characterized in that: The outer tube unit (1) further comprises a top plate (103) arranged on the top end of the tube body (101).

5. The detachable rock-embedded anti-pullout pile according to claim 4, characterized in that: The outer tube unit (1) further comprises a guide hole (104) arranged on the top plate (103); the plug-in drill rod unit (2) further comprises a guide rod (203) arranged on the lower end of the push ring (202) and used for inserting into the guide hole (104).

6. The detachable rock-embedded anti-pullout pile according to claim 3, characterized in that: The plug-in drill rod unit (2) further comprises a conical wear-resistant shell (204) sleeved on the insertion tip of the rock-breaking drill rod (201).

7. The detachable rock-embedded anti-pullout pile according to claim 6, characterized in that: The plug-in drill rod unit (2) further comprises a plug-in block (205) arranged on the annular end surface of the conical wear-resistant shell (204); the outer tube unit (1) further comprises a slot (105) arranged on the insertion end surface of the tube body (101) and used for inserting and positioning the tube body (101) on the soil layer (a) by inserting the plug-in block (205).

8. The detachable rock-embedded anti-pullout pile according to claim 4, characterized in that: The outer tube unit (1) further comprises a top plate reinforcement plate (106) arranged on the tube body (101) and used for supporting the top plate (103).

9. The detachable rock-embedded anti-pullout pile according to claim 3, characterized in that: The plug-in drill rod unit (2) further comprises a tensile plate (206) arranged on the rock-breaking drill rod (201) and used for obliquely pulling the push ring (202).

10. The detachable rock-embedded anti-pullout pile according to claim 2, characterized in that: The outer tube unit (1) further comprises an arc-shaped fixing groove (107) provided on the barbed steel plate (102) and used for connecting to the tube body (101).

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