Centering structure for drilling and pile planting
By fixing the components with an enlarged diameter outside the bottom of the pipe piles where the drilled piles are planted, the problem of the pipe piles tilting and edged in the hole is solved, the centering of the pipe piles is achieved, the bearing capacity and uniform wrapping of the filler is improved, and the quality problems are avoided.
Patent Information
- Application Number
- CN202421940432.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-12
AI Technical Summary
During the drilling and pile planting process, the pipe piles are prone to tilt and edge when they are lowered into the hole, resulting in the verticality of the pipe piles not meeting the requirements, resulting in insufficient bearing capacity, unable to wrap the filling materials around the pile evenly, and the pile position deviation exceeds the specifications and design requirements.
A centering structure is designed, including fixing several components that increase the diameter of the lower part of the pipe pile at a distance from the outer side of the bottom of the pipe pile. The periphery of all components is located on the same circumference concentric with the pipe pile, and the diameter of the circumference is smaller than the diameter of the pile hole.
By expanding the diameter of the lower part of the pipe pile to be close to the diameter of the pile hole, the lower part of the pipe pile is centered to avoid deviation, ensuring the verticality and axial stress of the pipe pile, achieving uniform wrapping of the filling material around the pile, improving the vertical bearing capacity of the single pile, and avoiding quality problems.
Smart Images
Figure CN222893629U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drilling piles, in particular to a centering structure for drilling piles. Background Art
[0002] Pile foundation is a foundation form with high bearing capacity, wide application range and long history. It is widely used in high-rise buildings, ports, bridges and other projects. It is the most widely used deep foundation form. Pile foundation can be divided into two categories according to the construction method: cast-in-place piles and precast piles. Precast piles include wooden piles, steel piles, pipe piles, etc. Among them, pipe piles are the most widely used. The construction method is generally hammering and static pressure. Precast piles are increasingly widely used in the market due to their advantages such as visible and controllable quality, low cost, short construction period and clean site.
[0003] In recent years, the emergence of bored pile technology has overcome many geological limitations and has been gradually widely used throughout the country. Drilled piles mainly form pile holes underground by drilling, and then pour concrete or insert prefabricated pile bodies in the holes to form pile foundations. Among them, when inserting prefabricated pile bodies, most bored piles adopt a method in which the hole diameter is larger than the pile diameter. When the pipe pile is lowered into the hole, it is easy to tilt and lean against the side, that is, it is difficult to form concentric circles between the pipe pile and the pile hole (hereinafter referred to as centering). This causes the verticality of the pipe pile to fail to meet the requirements, resulting in insufficient bearing capacity of the pipe pile, the pipe pile and the filling material around the pile cannot be evenly wrapped so that the pipe pile cannot be effectively constrained, and the bottom of the pipe pile cannot reach the bottom of the hole to form a hanging pile when inserted into the hole side, and the pile position deviation exceeds the specifications and design requirements. In addition, in the actual construction process, the construction unit, considering the construction cost and construction efficiency issues, mostly did not take centering measures to solve the above problems. Utility Model Content
[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a centering structure for pile drilling to solve the problem that during the pile drilling process, the pipe pile is prone to tilt and lean against the side when lowered into the hole, causing the verticality of the pipe pile to fail to meet the requirements.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A centering structure for drilling piles comprises a pipe pile located in a pile hole; a plurality of components for increasing the diameter of the lower portion of the pipe pile are fixed at intervals around the outer side of the bottom of the pipe pile, and the peripheries of all the components are located on the same circumference concentric with the pipe pile; the diameter of the circumference is smaller than the diameter of the pile hole.
[0007] Furthermore, the component is an L-shaped metal component consisting of a horizontal section and a vertical section, the upper surface of the horizontal section of the metal component is welded and fixed to the bottom of the pipe pile; the vertical section of the metal component is located outside the pipe pile, and the outer surface of the vertical section forms the periphery of the component.
[0008] Furthermore, a gap is formed between the vertical section and the outer wall of the pipe pile.
[0009] Furthermore, a rectangular pad is provided in the gap, and two opposite sides of the rectangular pad are in contact with the inner surface of the vertical section and the outer wall of the pipe pile at the same time.
[0010] Furthermore, the cushion block is a wooden block or a rubber block.
[0011] Furthermore, the wooden blocks or rubber blocks are fixedly connected to the vertical sections by means of screws.
[0012] Furthermore, the diameter difference between the circle and the pile hole is one fifth to one tenth of the diameter difference between the pipe pile and the pile hole.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The utility model fixes a number of components that increase the diameter of the lower part of the pipe pile at intervals around the outer side of the bottom of the pipe pile, and makes the circumference formed by the periphery of all the components concentric with the pipe pile, and the diameter of the circumference is smaller than the pile hole diameter. This is equivalent to enlarging the diameter of the lower part of the pipe pile, making the diameter of the lower part of the pipe pile closer to the pile hole diameter than before the improvement, thereby realizing the centering of the lower part of the pipe pile. This centering method can prevent the bottom of the pipe pile from deviating from the center of the pile hole, and the upper part of the pipe pile can be centered by adjusting the inclination of the upper part of the pipe pile in real time through the pile driver. The centering structure of the utility model has a simple structure, low installation cost, good centering effect, can ensure that the pipe pile is vertically and axially stressed, and realizes uniform and effective wrapping of the pile surrounding filling material within the full length of the pipe pile, so as to achieve better joint stress and improve the vertical bearing capacity of the single pile. It also avoids the quality problems such as the pile bottom cannot reach the bottom of the hole when the insertion hole side is inserted into the hole to form a hanging pile, and the pile position deviation exceeds the specification and design requirements, which is of great significance to the actual construction project. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic cross-sectional structure diagram of the centering structure for drilling piles of the utility model;
[0016] Figure 2 This is a bottom structural schematic diagram of the centering structure for drilling and piling of the utility model;
[0017] In the figure, there are pipe pile 1, component 2, pile hole 3, and spacer block 4. DETAILED DESCRIPTION
[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0019] like Figure 1 , Figure 2As shown, a centering structure for drilling piles includes a pipe pile 1, which is located in a pile hole 3; a plurality of components 2 for increasing the diameter of the lower portion of the pipe pile 1 are fixed at intervals around the outer side of the bottom of the pipe pile 1, and the peripheries of all the components 2 are located on the same circumference concentric with the pipe pile 1; the diameter of the circumference is smaller than the diameter of the pile hole 3.
[0020] The utility model fixes a number of components 2 that increase the diameter of the lower part of the pipe pile 1 at intervals around the outer side of the bottom of the pipe pile 1, and makes the circumference formed by the periphery of all the components 2 concentric with the pipe pile 1, and the diameter of the circumference is smaller than the diameter of the pile hole 3. This is equivalent to enlarging the diameter of the lower part of the pipe pile 1, making the diameter of the lower part of the pipe pile 1 closer to the diameter of the pile hole 3 than before the improvement, thereby realizing the centering of the lower part of the pipe pile 1. This centering method can avoid excessive deviation of the lower part of the pipe pile 1, resulting in insufficient bearing capacity caused by the verticality of the pipe pile 1 not meeting the requirements, the pipe pile and the pile surrounding filler cannot be evenly wrapped to effectively restrain the pipe pile, the bottom of the pipe pile cannot reach the bottom of the hole to form a hanging pile when inserted into the hole side, and the pile position deviation exceeds the specification and design requirements. The upper part of the pipe pile 1 can achieve the centering of the lower and upper parts of the pipe pile 1 by adjusting the inclination in real time through the pile driver. The centering structure of the utility model has a simple structure, low installation cost, good centering effect, and is of great significance to actual construction projects.
[0021] In specific implementation, the component 2 is an L-shaped metal component 2 consisting of a horizontal section and a vertical section, the upper surface of the horizontal section of the metal component 2 is welded and fixed to the bottom of the pipe pile 1; the vertical section of the metal component 2 is located outside the pipe pile 1, and the outer surface of the vertical section forms the periphery of the component 2. The L-shaped metal component 2 has a simple structure, low cost, and is convenient for welding and fixing to the pipe pile.
[0022] In specific implementation, a gap is formed between the vertical section and the outer wall of the pipe pile 1. The size of the gap can be flexibly adjusted according to the diameter difference between the pile hole 3 and the pipe pile 1. The setting of the gap can avoid the need to thicken the vertical section to fit the outer wall of the pipe pile while ensuring the circumferential diameter, thereby saving materials.
[0023] In specific implementation, a rectangular pad 4 is arranged in the gap, and the two opposite sides of the rectangular pad 4 are simultaneously in contact with the inner surface of the vertical section and the outer wall of the pipe pile 1. Although the setting of the gap can save materials, it will affect the strength of the vertical section. By arranging the pad in the gap, the stability of the component 2 can be enhanced, and the component 2 can be prevented from being deformed by force, which affects the verticality of the pipe pile 1.
[0024] In specific implementation, the cushion block 4 is a wooden block or a rubber block. These materials have certain strength and relatively low cost.
[0025] In specific implementation, the wooden block or rubber block is fixedly connected to the vertical section by screws. Such a fixing method is simple to install and has strong operability, and can also prevent the pad 4 from falling off midway, causing the component 2 to be deformed by force and affecting the verticality of the pipe pile 1.
[0026] In a specific implementation, the diameter difference between the circle and the pile hole 3 is one fifth to one tenth of the diameter difference between the pipe pile 1 and the pile hole 3 .
[0027] In a specific implementation, the metal component 2 is an iron component 2. Using iron to prepare the component 2 has a low cost and is convenient for welding on the pile tip or end plate at the bottom of the pile.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.
Claims
1. A centering structure for drilling piles, comprising a pipe pile, the pipe pile being located in a pile hole; characterized in that: A number of components for increasing the diameter of the lower part of the pipe pile are fixed at intervals around the outer side of the bottom of the pipe pile, and the peripheries of all the components are located on the same circumference concentric with the pipe pile; the diameter of the circumference is smaller than the diameter of the pile hole.
2. The centering structure for drilling piles according to claim 1, characterized in that: The component is an L-shaped metal component consisting of a horizontal section and a vertical section. The upper surface of the horizontal section of the metal component is welded and fixed to the bottom of the pipe pile; the vertical section of the metal component is located outside the pipe pile, and the outer surface of the vertical section forms the periphery of the component.
3. The centering structure for drilling piles according to claim 2, characterized in that: A gap is formed between the vertical section and the outer wall of the pipe pile.
4. The centering structure for drilling piles according to claim 3, characterized in that: A rectangular pad is arranged in the gap, and two opposite sides of the rectangular pad are simultaneously in contact with the inner surface of the vertical section and the outer wall of the pipe pile.
5. The centering structure for drilling piles according to claim 4, characterized in that: The cushion block is a wooden block or a rubber block.
6. The centering structure for drilling piles according to claim 5, characterized in that: The wooden blocks or rubber blocks are fixedly connected to the vertical sections by means of screws.
7. The centering structure for drilling piles according to claim 1, characterized in that: The diameter difference between the circle and the pile hole is one fifth to one tenth of the diameter difference between the pipe pile and the pile hole.