Concrete prefabricated composite core pile
By using a precast concrete composite core pile structure with an outer casing wrapped around the existing core pile and then cast in a second phase, the problem of excessive bearing capacity of precast piles is solved, achieving effective utilization of resources and reduction of construction costs, while improving the bearing capacity and stability of the composite core pile.
Patent Information
- Application Number
- CN202422523482.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-10-18
AI Technical Summary
In engineering projects where local shear forces and bending moments are large, existing precast piles have excessive bearing capacity, leading to resource waste and increased construction costs. They may also damage the foundation soil and affect the stability of the building.
The precast concrete composite core pile structure is adopted. By wrapping an outer shell around the existing core pile and casting it in a second time, prestressed or non-prestressed tendons can be embedded in the outer shell to enhance the bearing capacity and connection strength of the composite core pile and avoid stress concentration.
Effectively utilize existing pile resources, reduce construction costs, improve bearing capacity, reduce the risk of ring cracking, and meet actual engineering needs.
Smart Images
Figure CN223607842U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of concrete prefabricated component, especially a concrete prefabricated composite core pile. BACKGROUND
[0002] With the rapid development of urbanization construction in China, the application field of prestressed concrete pipe pile is also expanding, and pipe pile and its supporting products gradually form a new industry, which has developed rapidly. The industrial scale, product types, specifications, models, processes, supporting technologies, and application range of prefabricated piles in China have been greatly improved, and new products, new technologies, and new equipment of related prefabricated piles are emerging in an endless stream.
[0003] The design of existing prefabricated pile products mostly changes the cross-sectional shape profile and structural reinforcement to enable the foundation pile to meet the bearing capacity requirements under certain special working conditions. In order to deal with engineering projects with large local shear force and bending moment, prefabricated pile products with good mechanical properties and high bearing capacity are usually used. Although this approach can ensure the stability and safety of buildings, it also brings some problems. The use of prefabricated piles with good mechanical properties and high bearing capacity will lead to excess mechanical properties. This means that in actual engineering, the bearing capacity of the pile far exceeds the actual demand. This not only wastes resources, but also increases construction costs. In addition, due to the excessive bearing capacity of the pile, it may cause damage to the ground soil body, thereby affecting the stability of the entire building. Therefore, for engineering conditions with large local shear force and bending moment, the bearing demand of the pile and the effective use of resources should be considered comprehensively to optimize the design and construction of pile foundation and improve the economic benefit and sustainability of the project. SUMMARY
[0004] The utility model provides a kind of concrete prefabricated composite core pile, can utilize existing prefabricated concrete pile, guarantee the bearing capacity of entire composite core pile.
[0005] To solve the above problems, the utility model adopts the following technical scheme:
[0006] The embodiment of the utility model provides a kind of concrete prefabricated composite core pile, including core pile and outer package, the outer package is set on the outside of core pile and is wrapped at least a part of the outer circumferential surface of core pile, and the outer package is twice casted and formed on the outside of core pile.
[0007] In some embodiments, the outer package is embedded with prestressed reinforcement or non-prestressed reinforcement.
[0008] In some embodiments, the outer package is embedded with prestressed reinforcement, which extends along the length direction of the core pile, or the prestressed reinforcement is arranged in a spiral shape around the core pile; or the outer package is embedded with non-prestressed reinforcement, which extends along the length direction of the core pile.
[0009] In some embodiments, the prestressed tendon is a prestressed steel bar or a steel strand; or the non-prestressed tendon is a hot-rolled ribbed steel bar.
[0010] In some embodiments, the core pile is provided with a groove on the outer circumferential surface, and a part of the outer package body is embedded in the groove.
[0011] In some embodiments, the surface of the core pile is provided with an anchor, and the anchor is anchored with the outer package body.
[0012] In some embodiments, the core pile is embedded with a pre-embedded part, and the anchor is fixedly connected with the pre-embedded part.
[0013] In some embodiments, the outer package body is provided with one and wraps a part of the outer circumferential surface of the core pile; or the outer package body is provided with one and is longitudinally arranged along the core pile to wrap the entire outer circumferential surface of the core pile; or the outer package body is provided with a plurality of and is spaced along the length direction of the core pile.
[0014] In some embodiments, the cross-sectional shape of the core pile is circular or square, and the outer contour of the cross-section of the outer package body is circular or square.
[0015] In some embodiments, the core pile is embedded with a prestressed tendon or a non-prestressed tendon; and the core pile is provided with a central hole penetrating through itself along the length direction thereof.
[0016] The utility model has at least the following beneficial effects: the utility model is the outer package body of twice pouring forming outside the existing core pile, the outer package body is sleeved outside the core pile and wraps at least a part of the outer circumferential surface of the core pile, forms the composite core pile, effectively utilizes the existing pile resources, reduced the resource waste, reduced the construction cost, simultaneously, the bearing capacity of whole composite core pile is greatly promoted, can satisfy actual need.
[0017] In addition, the outer package body and the core pile are formed separately, avoiding stress concentration at the interface position of the outer package body and the core pile during construction when integrally formed, reducing the risk of ring crack damage at the interface transition section. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a structure schematic view of embodiment 1 of the utility model;
[0019] Figure 2 It is a sectional view schematic view of the concrete prefabricated composite core pile of an embodiment of the utility model;
[0020] Figure 3It is a sectional view schematic diagram of the concrete prefabricated composite core pile of another embodiment of the utility model;
[0021] Figure 4 It is a sectional view schematic diagram of the concrete prefabricated composite core pile of another embodiment of the utility model;
[0022] Figure 5 It is a structure schematic diagram of embodiment 2 of the utility model;
[0023] Figure 6 It is a structure schematic diagram of embodiment 3 of the utility model;
[0024] Figure 7 It is a structure schematic diagram of embodiment 4 of the utility model;
[0025] Figure 8 It is a structure schematic diagram of embodiment 5 of the utility model;
[0026] Figure 9 It is a structure schematic diagram of embodiment 6 of the utility model;
[0027] Figure 10 It is a structure schematic diagram of embodiment 7 of the utility model.
[0028] Wherein, the reference signs are:
[0029] Core pile 100, center hole 101, reinforcing bar 110;
[0030] Outer package 200, prestressed tendon 210;
[0031] End plate 300. DETAILED DESCRIPTION
[0032] The utility model provides the following description with reference to the attached drawings to help comprehensively understand various embodiments of the utility model as defined by the claims and its equivalents. The description includes various specific details to help understanding, but these details should be regarded as just exemplary. Therefore, those skilled in the art will realize that various changes and modifications can be made to various embodiments described herein without departing from the scope and spirit of the utility model.
[0033] In the description of the utility model, the orientation description such as the orientation or position relationship indicated by up, down, front, back, left, right etc. is based on the orientation or position relationship shown in the attached drawings, just for the convenience of describing the utility model and simplifying the description, and is not to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore can not be understood as the limitation of the utility model.
[0034] It should be understood that when an element (e.g., a first element) is "connected" with another element (e.g., a second element), the element can be directly connected with the other element or intervening elements (e.g., a third element) can be present between the element and the other element.
[0035] The embodiment of the utility model provides a kind of prefabricated composite core pile of concrete, as shown in it, Figure 1 As shown, it includes core pile 100 and outer package 200, outer package 200 is set in the outside of core pile 100 and is wrapped at least part of the outer peripheral surface of core pile 100, and outer package 200 is twice casted on the outside of core pile 100.It is specific that core pile 100 can be placed in prefabricated mould, and concrete is filled in mould, and concrete is coated on the outside of core pile 100 to form outer package 200.Therefore, the embodiment utilizes existing core pile 100, and core pile 100 and outer package 200 form composite core pile, effectively utilize existing pile resources, reduce resource waste, reduce construction cost, simultaneously, the cross-sectional area of composite core pile is significantly increased, end surface bearing capacity, horizontal force resistance is significantly improved, can make full use of the advantage of high compressive strength of concrete, and the bearing capacity of entire composite core pile can satisfy actual needs.In addition, outer package 200 is formed separately with core pile 100, avoids stress concentration at interface position of outer package 200 and core pile 100 when integrally formed, reduces the risk of ring crack damage in interface transition section.
[0036] Whether reinforcing bar is needed in outer package 200 is provided as follows in the following several embodiments.
[0037] In some embodiments, as shown in Figure 2 Outer package 200 is not buried with reinforcing steel bars, which can reduce the forming process of outer package 200 and facilitate the rapid forming of outer package 200.
[0038] In other embodiments, as shown in Figure 3 Outer package 200 is buried with prestressed steel bars 210, which can enhance the structural strength of outer package 200.Prestressed steel bars 210 mainly have the following two arrangement modes:
[0039] In one arrangement mode, as shown in Figure 3 Prestressed steel bars 210 extend along the length direction of core pile 100, which has the advantages of simple structure and easy operation.
[0040] In another arrangement mode, as shown in Figure 4 Prestressed steel bars 210 are arranged in a spiral shape around core pile 100.This can provide radial restraint force for outer package 200 and core pile 100, improve the crack resistance and shear performance of composite core pile, and at the same time, the steel consumption of the cross section is greatly reduced, the cost increase is not large, and the performance improvement is obvious.
[0041] In this embodiment, the prestressed tendon 210 includes but is not limited to prestressed steel bar and steel strand.
[0042] In yet another embodiment, non-prestressed tendon is embedded in the outer package 200. The non-prestressed tendon can also enhance the structural strength of the outer package 200, while saving the step of prestressed stretching and simplifying the forming process. The non-prestressed tendon can extend along the length direction of the core pile 100. The non-prestressed tendon can be selected from hot-rolled ribbed steel bars.
[0043] In order to enhance the connection strength of the core pile 100 and the outer package 200, the following embodiments are provided.
[0044] In one embodiment, the outer circumferential surface of the core pile is provided with a groove, and a part of the outer package is embedded in the groove during secondary pouring, so as to increase the contact area of the core pile and the outer package with each other, increase the adhesion force, and enhance the connection strength of the core pile and the outer package.
[0045] Further, the groove can be arranged around the core pile to form an annular groove, and a plurality of grooves can be arranged, so that the core pile forms a structure similar to a variable cross-section pile, and the connection strength of the core pile and the outer package can be further enhanced.
[0046] In another embodiment, the surface of the core pile is provided with an anchor, and the anchor is embedded into the outer package during secondary pouring to be anchored with the outer package, so as to enhance the connection strength of the core pile and the outer package.
[0047] Part of the anchor can be directly embedded in the core pile, and the other part is located outside the core pile. Alternatively, a pre-embedded part is embedded in the core pile, and the anchor is fixedly connected with the pre-embedded part. Specifically, the anchor can be fixedly connected with the pre-embedded part by welding, mechanical connection or other means.
[0048] The anchor includes but is not limited to anchor bar and anchor plate. The pre-embedded part includes but is not limited to pre-embedded steel bar and pre-embedded steel plate.
[0049] For the form that the outer package 200 covers the outer circumferential surface of the core pile 100, the following embodiments are provided.
[0050] In one embodiment, the outer package is provided with one and wraps a part of the outer circumferential surface of the core pile, which makes the outer package concentrate in a certain area of the core pile, so as to be suitable for use in a use scenario with higher local bearing capacity requirement.
[0051] In another embodiment, as shown in Figure 5 The outer package 200 is provided with one and is arranged along the length direction of the core pile 100 to wrap the entire outer circumferential surface of the core pile 100, so as to strengthen the bearing capacity of the entire outer circumferential surface of the composite core pile.
[0052] In yet another embodiment, such as Figure 6 As shown, the outer casing 200 is provided with multiple components that are spaced apart along the length of the core pile 100, forming a structure similar to a variable cross-section pile. When subjected to tensile and compressive conditions, the entire composite core pile has a higher bearing capacity.
[0053] Regarding the shape of the core pile 100, several embodiments are provided below.
[0054] In one embodiment, such as Figure 7 As shown, the cross-sectional shape of the core pile 100 is circular.
[0055] In another embodiment, such as Figure 8 As shown, the cross-sectional shape of the core pile 100 is square.
[0056] Of course, depending on actual needs, the cross-sectional shape of the core pile 100 can also be irregular or other shapes.
[0057] Regarding the shape of the outer body 200, the following are several embodiments.
[0058] In one embodiment, such as Figure 7 As shown, the outer contour of the cross-section of the outer body 200 is circular.
[0059] In another embodiment, such as Figure 8 As shown, the outer contour of the cross-section of the outer body 200 is square.
[0060] Of course, depending on actual needs, the outer contour of the cross section of the outer body 200 can also be irregular or other shapes.
[0061] Regarding whether reinforcement is required within 100mm of the core pile, the following are several examples.
[0062] In one embodiment, no reinforcing steel is embedded in the core pile.
[0063] In another embodiment, such as Figures 2-4 As shown, a reinforcing bar 110 is embedded in the core pile 100. The reinforcing bar 110 may include prestressed tendons or non-prestressed tendons. The prestressed tendons include, but are not limited to, prestressed steel bars and steel strands.
[0064] Furthermore, the reinforcing bars 110 embedded in the core pile 100 can form a reinforcing cage, including main bars and stirrups wrapped around the main bars. The main bars extend along the length of the core pile 100. The main bars can be prestressed or non-prestressed bars, and the stirrups can be spirally wrapped around the main bars.
[0065] Regarding whether the core pile 100 is a solid structure, the following are several examples.
[0066] In one embodiment, such as Figure 1As shown, the core pile 100 is not provided with a center hole, and is a solid pile structure.
[0067] In another embodiment, as shown in Figure 9 As shown, the core pile 100 is provided with a center hole 101 penetrating through the core pile 100 along the length direction of the core pile 100. On the premise that the mechanical properties meet the construction needs, the existence of the center hole 101 can reduce the material of the core pile 100, thereby saving the manufacturing cost, and facilitating the piling construction and splicing.
[0068] For the structure of the end surface of the core pile 100, the following embodiments are provided.
[0069] In one embodiment, as shown in Figure 1 The end surface of the core pile 100 is not fixed with an end plate.
[0070] In another embodiment, as shown in Figure 5 The end surface of the core pile 100 is fixed with an end plate 300 to protect the end surface of the core pile 100.
[0071] In order to facilitate the understanding of the present application, the following will provide various combined embodiments. Embodiment 1:
[0072] As shown in Figure 1 The cross-sectional shape of the core pile 100 is circular; the outer contour of the cross section of the outer wrapper 200 is circular; the outer wrapper 200 is provided with one and is longitudinally arranged along the length direction of the core pile 100 to wrap the entire outer peripheral surface of the core pile 100; the core pile 100 is not provided with a center hole, and is a solid pile structure; and the end surface of the core pile 100 is not fixed with an end plate. Embodiment 2:
[0073] As shown in Figure 5 The cross-sectional shape of the core pile 100 is circular; the outer contour of the cross section of the outer wrapper 200 is square; the outer wrapper 200 is provided with one and is longitudinally arranged along the length direction of the core pile 100 to wrap the entire outer peripheral surface of the core pile 100; the core pile 100 is provided with a center hole penetrating through the core pile 100 along the length direction of the core pile 100; and the end surface of the core pile 100 is fixed with an end plate 300. Embodiment 3:
[0074] As shown in Figure 6 The cross-sectional shape of the core pile 100 is circular; the outer contour of the cross section of the outer wrapper 200 is square; the outer wrapper 200 is provided with multiple and is spaced apart along the length direction of the core pile 100; the core pile 100 is provided with a center hole penetrating through the core pile 100 along the length direction of the core pile 100; and the end surface of the core pile 100 is fixed with an end plate 300. Embodiment 4:
[0075] As shown in Figure 7As shown, the core pile 100 in this embodiment has a circular cross-sectional shape; the outer contour of the outer body 200 is circular; the outer body 200 is provided with a continuous length along the core pile 100 to cover the entire outer circumference of the core pile 100; the core pile 100 is provided with a central hole that penetrates through itself along its length; and an end plate 300 is fixed to the end face of the core pile 100. Example 5:
[0076] like Figure 8 As shown, the core pile 100 in this embodiment has a square cross-sectional shape; the outer contour of the outer body 200 has a square cross-section; the outer body 200 is provided with one and extends along the length of the core pile 100 to cover the entire outer circumference of the core pile 100; the core pile 100 does not have a central hole and is a solid pile structure; the end face of the core pile 100 does not have a fixed end plate. Example 6:
[0077] like Figure 9 As shown, the core pile 100 in this embodiment has a square cross-sectional shape; the outer contour of the outer body 200 has a square cross-section; the outer body 200 is provided with one and extends along the length of the core pile 100 to cover the entire outer circumference of the core pile 100; the core pile 100 is provided with a central hole 101 that extends through itself along its length; the end face of the core pile 100 does not have a fixed end plate. Example 7:
[0078] like Figure 10 As shown, the core pile 100 in this embodiment has a square cross-sectional shape; the outer contour of the outer body 200 is circular; the outer body 200 is provided with one and extends along the length of the core pile 100 to cover the entire outer circumference of the core pile 100; the core pile 100 is provided with a central hole 101 that extends through itself along its length; the end face of the core pile 100 does not have a fixed end plate.
[0079] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.
Claims
1. A concrete precast composite pile, characterized by: The core pile and the outer package body, the outer package body is set on the outside of the core pile and wraps at least a part of the outer circumferential surface of the core pile, the outer package body is twice casted and formed on the outside of the core pile; The outer circumferential surface of the core pile is provided with a groove, and a part of the outer package body is embedded in the groove.
2. The concrete precast composite pile core according to claim 1, characterized in that: The outer package body is embedded with prestressed reinforcement or non-prestressed reinforcement.
3. A concrete precast composite pile according to claim 2, characterised in that: The outer package body is embedded with prestressed reinforcement, and the prestressed reinforcement extends along the length direction of the core pile, or the prestressed reinforcement is arranged in a spiral around the core pile.
4. The concrete precast composite pile core according to claim 2, wherein: The outer package body is embedded with non-prestressed reinforcement, and the non-prestressed reinforcement extends along the length direction of the core pile.
5. The concrete precast composite pile core according to claim 2, wherein: The outer package body is embedded with prestressed reinforcement, and the prestressed reinforcement is prestressed steel bar or steel strand.
6. The concrete precast composite pile core according to claim 2, wherein: The outer package body is embedded with non-prestressed reinforcement, and the non-prestressed reinforcement is hot-rolled ribbed steel bar.
7. The concrete precast composite pile of claim 1, wherein: The surface of the core pile is provided with an anchor, and the anchor is anchored with the outer package body.
8. The concrete precast composite pile of claim 7, wherein: The core pile is embedded with a pre-embedded part, and the anchor is fixedly connected with the pre-embedded part.
9. A concrete precast composite pile according to any one of claims 1 to 8, characterised in that: The outer package body is provided with one and wraps a part of the outer circumferential surface of the core pile; or the outer package body is provided with one and is longitudinally arranged along the length direction of the core pile to wrap the entire outer circumferential surface of the core pile; or the outer package body is provided with multiple and is spaced apart along the length direction of the core pile.
10. A concrete precast composite pile according to any one of claims 1 to 8, characterised in that: The cross-sectional shape of the core pile is circular or square, and the outer contour of the cross section of the outer package body is circular or square.
11. A concrete precast composite pile according to any one of claims 1 to 8, characterised in that: The core pile is embedded with prestressed reinforcement or non-prestressed reinforcement; the core pile is provided with a central hole penetrating itself along the length direction thereof.