Anti-floating cast-in-situ bored pile
By designing a floating-resistant bracket in a drilled pile, using the combination of gravity rod and telescopic rod, the problem of insufficient floating-resistant performance of the drilled pile in the prior art is solved, and higher floating-resistant and pull-resistant performance are achieved, and the building stability is improved.
Patent Information
- Application Number
- CN202422252904.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing bored cast-injected piles have shortcomings in their floating resistance, especially in basement construction, which is difficult to effectively resist the floating and deformation of the foundation.
A resistant bored pile is designed, and an anti-floating bracket including a gravity rod and a telescopic rod is used to increase the bonding area between the pile body and the pile well by connecting the bottom of the steel cage, and adjust the expansion size of the anti-floating bracket to adapt to the inner wall of the drilling through the combination of a pulling spring and a sliding rod.
The anti-floating and pull-out performance of the drilled cast pile is improved, the binding force between the pile body and the pile well is enhanced, the stability and anti-floating effect of the building are ensured, and the applicability and compactness of the anti-floating bracket are improved.
Smart Images
Figure CN223017694U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of building construction, and particularly relates to a drilled cast-in-place pile for anti-floating. Background Art
[0002] A drilled cast-in-place pile refers to a pile formed by means of mechanical drilling, steel pipe soil extrusion or manual excavation on the construction site in the foundation soil, and placing a steel reinforcement cage and pouring concrete therein.
[0003] Currently, with the increasingly rapid development of urban construction, the anti-floating performance of drilled cast-in-place piles has received more and more attention. Especially the problem of basement anti-floating has become increasingly prominent. Utility Model Content
[0004] In order to improve the anti-floating performance of drilled cast-in-place piles and enhance the stability of buildings, this application provides a drilled cast-in-place pile for anti-floating.
[0005] A drilled cast-in-place pile for anti-floating provided by this application adopts the following technical solutions:
[0006] A drilled cast-in-place pile for anti-floating includes a pile body, a steel reinforcement cage embedded in the pile body, and an anti-floating support. The anti-floating support is connected to the bottom of the steel reinforcement cage;
[0007] The anti-floating support includes a gravity rod and a telescopic rod. One end of the telescopic rod is rotatably connected with a lifting ring. The lifting ring is slidably connected to the steel reinforcement cage in the vertical direction. The end of the telescopic rod away from the lifting ring is rotatably connected with one end of the gravity rod. The gravity rod is located below the telescopic rod. The end of the gravity rod away from the telescopic rod is rotatably connected to the steel reinforcement cage.
[0008] Optionally, an elastic member is built in the telescopic rod. The elastic member is used to apply an elastic force to the telescopic rod to drive the telescopic rod to shorten. The weight of the gravity rod is greater than the weight of the telescopic rod.
[0009] Optionally, the telescopic rod includes a sliding rod and a sleeve. One end of the sliding rod is rotatably connected with the lifting ring. The sleeve is sleeved outside the sliding rod. The end of the sleeve away from the sliding rod is closed and rotatably connected with the gravity rod.
[0010] Optionally, the elastic member is a tension spring. The length direction of the tension spring is parallel to the axial direction of the sleeve. One end of the tension spring is fixedly connected to the closed end of the sleeve. The other end of the tension spring is fixedly connected to the sliding rod. The tension spring applies an elastic force to the sliding rod to drive the sliding rod to slide into the sleeve.
[0011] Optionally, an extension plate is fixedly connected to the end of the sleeve close to the gravity rod, the extension plate is located on a side of the sleeve away from the steel cage, and a hanging hole is provided on the extension plate;
[0012] When the steel cage sinks in the drill hole, the hanging hole is used to hang a hook to pull the gravity rod upward to prevent the connection part between the gravity rod and the telescopic rod from sinking and scratching the inner wall of the drill hole.
[0013] Optionally, the diameter of the gravity rod is greater than the maximum diameter of the telescopic rod.
[0014] Optionally, the material density of the gravity rod is greater than the material density of the telescopic rod.
[0015] Optionally, the maximum length of the telescopic rod is greater than the length of the gravity rod.
[0016] Optionally, a plurality of anti-floating supports are provided along the circumference of the steel cage.
[0017] Optionally, a polytetrafluoroethylene layer is fixed to the inner wall of the lifting ring.
[0018] In summary, the present application includes at least one of the following beneficial technical effects:
[0019] The anti-floating bracket is used to increase the bonding area between the bottom of the steel cage and the cast pile body, thereby improving the anti-floating effect of the bored pile; and by adjusting the positions of the gravity rod and the telescopic rod and the length of the telescopic rod, the connecting part of the gravity rod and the telescopic rod can be fully sunk to the inner wall of the borehole, thereby fully increasing the horizontal expansion size of the anti-floating bracket. On the one hand, the bonding force between the anti-floating bracket and the pile body is improved, thereby improving the pull-out resistance and anti-buoyancy force, and on the other hand, the adaptability of the anti-floating bracket to the borehole size can be adjusted to improve the applicability of the anti-floating bracket.
[0020] The tension spring is used to shorten the telescopic rod as much as possible, and the gravity rod is heavy, which is more conducive to the sinking of the gravity rod and the contraction of the telescopic rod, expanding the horizontal expansion area of the anti-floating bracket and the compactness of the anti-floating bracket, thereby improving the anti-floating effect of the bored pile.
[0021] When the steel cage is sinking in the drill hole, the ground operator uses a long hook to hook the hanging hole to pull the connecting part of the telescopic rod and the gravity rod upwards to prevent the connecting part of the gravity rod and the telescopic rod from sinking and scratching the inner wall of the drill hole, thereby avoiding resistance to the sinking of the steel cage and improving the smoothness of the sinking of the steel cage. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a cross-sectional view of an anti-floating bored pile in an embodiment of the present application.
[0023] Figure 2 is Figure 1 the enlarged view of part A in
[0024] Figure 3 It is the structural schematic diagram of the anti - floating support in the embodiment of the present application.
[0025] Figure 4 It is the structural schematic diagram of the steel reinforcement cage and the anti - floating support in the embodiment of the present application, used to show the state before the anti - floating support unfolds outward.
[0026] Figure 5 It is the structural schematic diagram of the steel reinforcement cage and the anti - floating support in the embodiment of the present application, used to show the state after the anti - floating support unfolds outward.
[0027] Explanation of reference numerals:
[0028] 1, pile body; 2, steel reinforcement cage; 3, anti - floating support; 31, gravity rod; 32, telescopic rod; 321, sliding rod; 322, sleeve; 323, extension plate; 324, hanging hole; 33, lifting ring; 331, polytetrafluoroethylene layer; 34, elastic member. Specific embodiments
[0029] It should be understood that although terms such as "first", "second", "third" etc. may be used in the present application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. In addition, the terms "vertical", "horizontal", "up", "down" and similar expressions used in the present application refer to the positional relationship in the drawings and do not represent the expression of the only embodiment.
[0030] The following will further describe the present application in detail with reference to the attached Figures 1-5 drawings.
[0031] Referring to Figure 1 , the embodiment of the present application discloses an anti - floating bored cast - in - place pile, including a pile body 1, a steel reinforcement cage 2 embedded in the pile body 1, and an anti - floating support 3. This embodiment will be described in detail in the state after the bored cast - in - place pile is fabricated and formed.
[0032] Referring to Figure 1 , the anti - floating support 3 is connected to the bottom of the steel reinforcement cage 2, and multiple anti - floating supports 3 can be arranged circumferentially along the steel reinforcement cage 2 as needed. In this embodiment, the number of anti - floating supports 3 is two. It should be understood that the pile body 1 is formed by pouring concrete in the borehole dug by the drill rig. Before pouring the concrete, the steel reinforcement cage 2 is sunk into the borehole in advance.
[0033] Referring to Figure 1 , Figure 2 and Figure 3, the anti-floating support 3 includes a gravity rod 31 and a telescopic rod 32, and the gravity rod 31 is located below the telescopic rod 32. The telescopic rod 32 includes a sliding rod 321 and a sleeve 322, and the sleeve 322 is sleeved outside the sliding rod 321. One end of the sliding rod 321 passes through the sleeve 322 and is rotatably connected with a lifting ring 33. The end of the sliding rod 321 connected to the lifting ring 33 is the top end of the telescopic rod 32. The lifting ring 33 is sleeved on the vertical steel bars of the steel reinforcement cage 2. In order to reduce the sliding resistance of the lifting ring 33 on the vertical steel bars of the steel reinforcement cage 2, a polytetrafluoroethylene layer 331 is fixed on the inner wall of the lifting ring 33. The end of the sleeve 322 away from the sliding rod 321 is the bottom end of the telescopic rod 32. The end of the sleeve 322 away from the sliding rod 321 is closed and is rotatably connected with one end of the gravity rod 31.
[0034] Referring to Figure 1 and Figure 3 , the end of the gravity rod 31 rotatably connected with the sleeve 322 is the top end of the gravity rod 31, and the bottom end of the gravity rod 31 is rotatably connected to the horizontal steel bars of the steel reinforcement cage 2 or a horizontally arranged ring-shaped steel bar. Thus, a triangular structure is formed by the vertical steel bars, the telescopic rod 32 and the gravity rod 31 on the steel reinforcement cage 2.
[0035] Referring to Figure 4 and Figure 5 , after the steel reinforcement cage 2 sinks into the borehole, the gravity rod 31 and the telescopic rod 32 sink under the action of gravity. The gravity rod 31 and the telescopic rod 32 gradually sink from the Figure 4 state to the Figure 5 state. So that the end of the gravity rod 31 connected to the telescopic rod 32 can abut against the inner wall of the borehole. Thus, the anti-floating support 3 can be unfolded in the horizontal direction, and the bonding force between the anti-floating support 3 and the pile body 1 (referring to Figure 1 ) is utilized to increase the bonding stability between the steel reinforcement cage 2 and the pile body 1, thereby improving the anti-floating effect of the bored cast-in-place pile.
[0036] Referring to Figure 3 , in order to prevent the end of the gravity rod 31 connected to the telescopic rod 32 from rubbing against the inner wall of the borehole during the sinking process of the steel reinforcement cage 2, which is not conducive to the sinking of the steel reinforcement cage 2, an extension plate 323 is fixedly connected to the bottom of the sleeve 322, and a hanging hole 324 is formed on the extension plate 323. When the steel reinforcement cage 2 sinks in the borehole, the operator on the ground uses a long hook (the hook is not shown in the figure) to hook the hanging hole 324 to pull up the connection part of the telescopic rod 32 and the gravity rod 31, so that the top end of the gravity rod 31 approaches the steel reinforcement cage 2, improving the smoothness of the sinking of the steel reinforcement cage 2. When the steel reinforcement cage 2 sinks to the designated elevation, the hook is disengaged from the extension plate 323 and pulled out of the borehole upward. So that the gravity rod 31 and the telescopic rod 32 sink under the action of gravity until the connection part of the gravity rod 31 and the telescopic rod 32 expands outward.
[0037] Thus, the positions of the gravity rod 31 and the telescopic rod 32 and the length of the telescopic rod 32 are automatically adjusted by gravity, so that the connection part of the gravity rod 31 and the telescopic rod 32 can fully sink to abut against the inner wall of the drilling hole, thereby fully increasing the horizontal expansion size of the anti-floating bracket 3. On the one hand, the bonding force between the anti-floating bracket 3 and the pile body 1 is improved, and thus the anti-pulling force and anti-buoyancy are improved. On the other hand, the adaptability between the anti-floating bracket 3 and the drilling hole size can be adjusted, and the applicability of the anti-floating bracket 3 is improved.
[0038] Referring to Figure 2 and Figure 3 , in order to improve the structural compactness of the anti-floating bracket 3 after horizontal expansion during sinking, an elastic member 34 is arranged inside the sleeve 322. Specifically, the elastic member 34 is a tension spring. The length direction of the tension spring is parallel to the axial direction of the sleeve 322. One end of the tension spring is fixedly connected to the closed end of the sleeve 322, and the other end of the tension spring is fixedly connected to the sliding rod 321. The tension spring applies an elastic force to the sliding rod 321 to drive the sliding rod 321 to slide into the sleeve 322. And, in order to prevent the excessive tension of the tension spring from pulling the gravity rod 31 upward, in this embodiment, the weight of the gravity rod 31 is set to be much greater than the weight of the telescopic rod 32.
[0039] Referring to Figure 3 , in addition, in order to enable the telescopic rod 32 to freely expand and contract during the sinking of the gravity rod 31, the expansion and contraction amount of the telescopic rod 32 should be designed to be relatively large. For this reason, the maximum length of the telescopic rod 32 in this embodiment is greater than the length of the gravity rod 31. Therefore, in order to make the gravity rod 31 have a greater weight, in this embodiment, the diameter of the gravity rod 31 is set to be greater than the maximum diameter of the telescopic rod 32, and the material density of the gravity rod 31 is greater than the material density of the telescopic rod 32.
[0040] When the end of the gravity rod 31 away from the steel reinforcement cage 2 descends under the action of gravity, the tension spring pulls the sliding rod 321 to limit the length of the telescopic rod 32 to a shorter state, so that the lifting ring 33 can stably descend, so that the center of gravity of the telescopic rod 32 descends to approach the gravity rod 31. When the center of gravity of the telescopic rod 32 is close to the center of gravity of the gravity rod 31, the structure of the anti-floating bracket 3 is in a relatively compact state, so that the stability of the anti-floating bracket 3 is relatively high.
[0041] The implementation principle of an anti-floating bored pile in an embodiment of the present application is as follows: a drilling rig is used to excavate a drilling hole on the ground, and then the steel reinforcement cage 2 is sunk into the drilling hole. During the sinking process of the steel reinforcement cage 2, the operator on the ground uses a long hook to hook the hanging hole 324 to pull the extension plate 323 upward, so that the telescopic rod 32 and the gravity rod 31 are relatively close to the steel reinforcement cage 2, so that the connection part of the telescopic rod 32 and the gravity rod 31 is close to the steel reinforcement cage 2 and has a distance from the inner wall of the drilling hole, improving the smoothness of the sinking of the steel reinforcement cage 2.
[0042] When the steel reinforcement cage 2 sinks to the specified elevation, detach the hook from the extension plate 323 and pull it out of the borehole upward. This causes the gravity rod 31 and the telescopic rod 32 to sink under the action of gravity until the connection part between the gravity rod 31 and the telescopic rod 32 expands outward and abuts against the inner wall of the borehole. Then, pour concrete in the borehole to form the pile body 1, and finally, the bored pile is manufactured.
[0043] The above are all preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. An anti-floating bored pile, characterized in that: It comprises a pile body (1), a steel cage (2) pre-buried in the pile body (1), and an anti-floating support (3), wherein the anti-floating support (3) is connected to the bottom of the steel cage (2); The anti-floating support (3) comprises a gravity rod (31) and a telescopic rod (32); one end of the telescopic rod (32) is rotatably connected to a lifting ring (33); the lifting ring (33) is vertically slidably connected to the steel cage (2); one end of the telescopic rod (32) away from the lifting ring (33) is rotatably connected to one end of the gravity rod (31); the gravity rod (31) is located below the telescopic rod (32); and one end of the gravity rod (31) away from the telescopic rod (32) is rotatably connected to the steel cage (2).
2. The anti-floating bored pile according to claim 1, characterized in that: The telescopic rod (32) has an elastic member (34) built therein, and the elastic member (34) is used to apply an elastic force to the telescopic rod (32) to drive the telescopic rod (32) to shorten, and the weight of the gravity rod (31) is greater than the weight of the telescopic rod (32).
3. The anti-floating bored pile according to claim 2, characterized in that: The telescopic rod (32) comprises a sliding rod (321) and a sleeve (322); one end of the sliding rod (321) is rotatably connected to the lifting ring (33); the sleeve (322) is sleeved on the outside of the sliding rod (321); one end of the sleeve (322) away from the sliding rod (321) is closed and rotatably connected to the gravity rod (31).
4. The anti-floating bored pile according to claim 3, characterized in that: The elastic member (34) is a tension spring, the length direction of which is parallel to the axial direction of the sleeve (322), one end of the tension spring is fixedly connected to the closed end of the sleeve (322), and the other end of the tension spring is fixedly connected to the sliding rod (321), and the tension spring applies an elastic force to the sliding rod (321) to drive the sliding rod (321) to slide toward the inside of the sleeve (322).
5. The anti-floating bored pile according to claim 3, characterized in that: An extension plate (323) is fixedly connected to the end of the sleeve (322) close to the gravity rod (31), and the extension plate (323) is located on a side of the sleeve (322) away from the steel cage (2), and a hanging hole (324) is provided on the extension plate (323); When the steel cage (2) is sinking in the borehole, the hanging hole (324) is used to hang a hook to pull the gravity rod (31) upwards, so as to prevent the connection part between the gravity rod (31) and the telescopic rod (32) from sinking and thereby causing scratches on the inner wall of the borehole.
6. The anti-floating bored pile according to claim 2, characterized in that: The diameter of the gravity rod (31) is greater than the maximum diameter of the telescopic rod (32).
7. The anti-floating bored pile according to claim 2, characterized in that: The material density of the gravity rod (31) is greater than the material density of the telescopic rod (32).
8. The anti-floating bored pile according to claim 1, characterized in that: The maximum length of the telescopic rod (32) is greater than the length of the gravity rod (31).
9. The anti-floating bored pile according to claim 1, characterized in that: A plurality of the anti-floating supports (3) are arranged along the circumference of the steel cage (2).
10. The anti-floating bored pile according to claim 1, characterized in that: A polytetrafluoroethylene layer (331) is fixed to the inner wall of the lifting ring (33).