PHC pipe pile head sealing device and PHC pipe pile head
By designing the PHC pipe pile head sealing device, the hollow structure of the annular steel plate, the bottom steel plate and the supporting rib plate is used to solve the problem of pile hole pollution, improve the sealing and stiffness of the pile head, and improve the bearing capacity of the pipe piles and Reduced construction costs.
Patent Information
- Application Number
- CN202420900329.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-28
AI Technical Summary
During the construction of pipe piles, the pile holes are easily contaminated by soil and other debris, which affects the bonding force between the pile core concrete and the pipe pile prestressed concrete, and reduces the bearing capacity of the pipe pile.
A PHC pipe pile head sealing device is designed, including an annular steel plate, a bottom steel plate and a supporting rib plate. It is connected to the pile head end plate through a fixed connection part to form a hollow structure of double-layer steel plates to ensure the sealing effect and prevent debris. pollute.
Effectively prevents soil and other debris from entering the pile hole, improves the integrity and stiffness of the pile head, reduces the cleaning workload, improves the bearing capacity of pipe piles, and reduces the construction and cleaning costs.
Smart Images
Figure CN222227272U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe pile construction, in particular to a PHC pipe pile head sealing device and a PHC pipe pile head. Background Art
[0002] At present, in most engineering projects, the construction process of pipe pile sinking precedes the excavation of the foundation trench. Therefore, after the prestressed pipe pile is sunk, during the excavation of the foundation trench, the pile hole of the hollow pipe pile is easily contaminated by dirt and other debris, causing blockage. During the pile sinking process, measures such as placing iron plates or iron basins are taken between the pile driver and the pile head end plate, but there is no effective fixation formed by the pile head end plate. Therefore, when the foundation pit is excavated, the material of the measures falls off, and after the pile hole is exposed, it is inevitable that dirt and other debris will block the pile hole. Therefore, this problem needs to be solved to avoid unnecessary workload caused by cleaning the pile hole, and pile hole cleaning and pile hole core filling are important concealed projects. If the cleaning is not thorough, it will seriously affect the bonding strength between the pile core concrete and the pipe pile prestressed concrete, greatly reducing the bearing capacity of the pipe pile with pull-out and compression requirements. Utility Model Content
[0003] The utility model aims to solve the technical problem of ensuring the sealing effect of a pile hole and preventing debris from clogging the pile hole, and proposes a PHC pipe pile head sealing device and a PHC pipe pile head.
[0004] The technical problem of the utility model is solved by the following technical solutions:
[0005] A PHC pipe pile head sealing device comprises an annular steel plate, a bottom steel plate and a supporting rib plate, wherein the annular steel plate is in the shape of an annulus, the bottom steel plate is in the shape of a circle, the bottom steel plate is arranged parallel to the bottom of the annular steel plate, the annular steel plate and the bottom steel plate are connected via the supporting rib plate, the annular steel plate and the bottom steel plate are of the same size, the bottom steel plate is used for fitting and sealing a pile head end plate, and a fixed connection portion is arranged on the bottom steel plate for connecting the pile head end plate of the PHC pipe pile head.
[0006] In some embodiments, the inner diameter of the annular steel plate is 160 to 900 mm.
[0007] In some embodiments, the fixed connection portion includes bolt holes, and the bolt holes are arranged in a circular array concentric with the bottom steel plate.
[0008] In some embodiments, the number of the bolt holes is ten.
[0009] In some embodiments, the supporting ribs are arranged in a "M" shape.
[0010] In some embodiments, the support ribs have a height of 50 to 100 mm and a length of 58 to 133 mm.
[0011] In some embodiments, the thickness of the annular steel plate and the supporting ribs is 10 to 16 mm, and the thickness of the bottom steel plate is 10 to 12 mm.
[0012] The utility model also provides a PHC pipe pile head, including a pile head end plate and the above-mentioned PHC pipe pile head sealing device, wherein the bottom steel plate is detachably connected to the top of the pile head end plate through a fixed connection part, and the diameter of the bottom steel plate is consistent with the diameter of the pile head end plate.
[0013] In some embodiments, the fixed connection portion includes a bolt hole, the pile head end plate includes a main reinforcement anchor hole, the number, diameter and arrangement of the main reinforcement anchor holes are consistent with the bolt holes, and each of the main reinforcement anchor holes is concentrically aligned with the bolt hole;
[0014] The bottom steel plate is connected to the pile head end plate by means of hexagonal bolts, and the hexagonal bolts pass through the bolt holes and are screwed into the main reinforcement anchor holes.
[0015] The beneficial effects of the utility model compared with the prior art include:
[0016] The PHC pipe pile head sealing device proposed by the utility model can realize hollowing between the double-layer steel plates by arranging the bottom steel plate and the annular steel plate of the same size in parallel and connecting them through supporting ribs, thereby reducing the weight and ensuring the structural strength.
[0017] The PHC pipe pile head proposed by the utility model is formed by arranging a bottom steel plate with the same diameter above the pile head end plate, and the bottom steel plate and the pile head end plate are connected and fixed by a fixed connection part, so that the end of the pile head forms a closed structure, which prevents dirt and other debris from polluting the pile hole, thereby improving the integrity and rigidity of the pile head connection and preventing the PHC pipe pile head sealing device from loosening during the pile sinking process.
[0018] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a three-dimensional structural diagram of a PHC pile head sealing device according to an embodiment of the utility model;
[0020] Figure 2 1. It is a top view of the PHC pile head sealing device according to an embodiment of the utility model;
[0021] Figure 3 It is a cross-sectional view of a PHC pile head sealing device according to an embodiment of the utility model;
[0022] Figure 4 It is a schematic plan view of the bottom steel plate of the PHC pile head sealing device according to the embodiment of the utility model;
[0023] Figure 5 It is a plan view of an annular steel plate of a PHC pile head sealing device according to an embodiment of the utility model;
[0024] Figure 6 It is a schematic plan view of the supporting rib plate of the PHC pile head sealing device according to the embodiment of the utility model;
[0025] Figure 7 It is a three-dimensional structural diagram of the PHC pipe pile head according to an embodiment of the utility model.
[0026] The reference numerals are as follows:
[0027] 1- bottom steel plate, 2- annular steel plate, 3- supporting ribs, 4- bolt holes. DETAILED DESCRIPTION
[0028] The present invention is further described below with reference to the accompanying drawings and in combination with preferred embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.
[0029] It should be noted that the directional terms such as left, right, up, down, top, and bottom in this embodiment are merely relative concepts or are based on the normal use status of the product, and should not be considered as restrictive.
[0030] In order to ensure the sealing effect of the pile hole and meet the bearing capacity requirements of the pipe pile, the utility model proposes an end sealing device which is added on the basis of the unchanged standard end plate type of the prestressed pipe pile.
[0031] refer to Figure 1-Figure 3 The embodiment of the utility model shows a PHC pile head sealing device, including a bottom steel plate 1, an annular steel plate 2 and a supporting rib plate 3. The annular steel plate is in the shape of an annulus, and the bottom steel plate is in the shape of a circle. The bottom steel plate 1 is arranged parallel to the bottom of the annular steel plate 2, and the annular steel plate 2 and the bottom steel plate 1 are connected by the supporting rib plate 3. The annular steel plate 2 is the same size as the bottom steel plate 1, and the bottom steel plate 1 is used to fit and seal the pile head end plate. The bottom steel plate 1 is provided with a fixed connection portion for connecting the pile head end plate of the PHC pile head.
[0032] The following takes PHC-500(125)AB pile type as an example to describe:
[0033] The PHC pile head sealing device of this embodiment is a hollow structure of "upper and lower circular flat plates with a supporting rib 3 in the middle for reinforcement". The processing dimensions of the supporting rib 3 are 60 mm in height and 113 mm in length. There are 10 pieces. According to the characteristics of the PHC-500 (125) AB pile type, there are 10 main reinforcement anchor holes in total. The purpose is to improve the integrity of the hollow structure of this embodiment and better transmit the downward force applied by the pile driver to the annular steel plate 2. The supporting rib 3 is arranged in a "M" shape between the annular steel plate 2 and the bottom steel plate 1. The purpose is to make the stiffening plates evenly distributed and evenly transmit the downward force applied by the pile driver to the annular steel plate 2.
[0034] refer to Figure 4 In this embodiment, the fixed connection portion includes bolt holes 4, and the arrangement of the bolt holes 4 is a circular array concentric with the bottom steel plate 1. The processing dimensions of the bottom steel plate 1 refer to the end plate details of the "Prestressed Concrete Pipe Pile Atlas" and the PHC pile end plate parameter table D 3 —476mm. Along D p —406mm openings, 10 holes, hole diameter 32mm. In this embodiment, the number of bolt holes 4 is 10.
[0035] refer to Figure 5 In the preferred embodiment, the annular steel plate 2 is in the shape of a ring, and its inner diameter is 160 to 900 mm. In this embodiment, the processing dimensions of the annular steel plate 2 refer to the end plate details of the "Prestressed Concrete Pipe Pile Atlas" and the PHC pile end plate parameter table D 3 —476mm. The center hollowing size is 250mm in diameter. The consideration is that the center hollowing size must be smaller than the outer diameter of the pile driver. If the pile driver is unconventional, the outer diameter of the pile driver may be smaller, which may affect the contact area between the pile driver and the annular steel plate 2.
[0036] PHC pile end plate parameter table refers to the following table 1:
[0037] Table 1
[0038]
[0039] Figure 6 The supporting ribs 3 in this embodiment, in a preferred embodiment, have a height of 50 to 100 mm and a length of 58 to 133 mm.
[0040] The thickness of the annular steel plate 2 and the supporting ribs 3 is 10 to 16 mm, and the thickness of the bottom steel plate 1 is 10 to 12 mm.
[0041] refer to Figure 7The present embodiment further provides a PHC pipe pile head, including a pile head end plate and the above-mentioned PHC pipe pile head sealing device, wherein the bottom steel plate 1 is detachably connected to the top of the pile head end plate through a fixed connection portion, and the diameter of the bottom steel plate 1 is consistent with the diameter of the pile head end plate.
[0042] In this embodiment, the fixed connection part includes a bolt hole 4, and the bottom steel plate 1 is connected to the pile head end plate by a hexagonal bolt, and the hexagonal bolt is arranged at the position of the bolt hole 4; the pile head end plate includes a main reinforcement anchor hole, and the number, diameter and arrangement of the main reinforcement anchor holes are consistent with the bolt hole 4, and each main reinforcement anchor hole is concentrically aligned with the bolt hole 4.
[0043] In this embodiment, the end plate material is Q235B. The main reinforcement anchor hole diameter is 27mm, internal thread, depth 25mm, total 10. The sealing device in the PHC pile head is connected to the standard end plate of the prestressed pile with a high-strength hexagonal bolt. The bolt passes through the bolt hole 4 (i.e., the fixed connection part) of the bottom steel plate of the sealing device and is screwed into the main reinforcement anchor hole. The high-strength hexagonal bolt adopts M27x35mm (the main reinforcement anchor hole depth of the pile head end plate is 25mm + the bottom steel plate of the sealing device is 10mm, i.e., 35mm).
[0044] The PHC pile head of this embodiment has the following characteristics:
[0045] Sealing device: preferably made of Q235B steel plate, the cross-sectional size of the bottom steel plate and the pile head is D 3 The solid round steel plate is 10mm thick and must be flat and fit closely with the pile head end plate, which is conducive to the downward force of the pile driving machine being better transmitted to the pile body and forming a closed structure at the end of the pile head, thus preventing dirt and other debris from contaminating the pile hole.
[0046] Connection method: It is preferred to use high-strength hexagonal bolts to connect with the pile head end plate. Thanks to the stress and appearance characteristics of high-strength hexagonal bolts, the hexagonal head of the hexagonal bolt can be manually installed and disassembled on site with the help of a wrench; high-strength bolts have stronger shear resistance and prestress than ordinary bolts, which can generate greater extrusion force between the connecting rods, thereby creating greater friction perpendicular to the screw direction. This improves the integrity and rigidity of the connection, which is beneficial to prevent the high-strength bolts from loosening during the pile sinking process;
[0047] Reuse: To facilitate the disassembly and reuse of the sealing component, and to ensure that the consistency between the pile driver and the central axis of the pile body will not be affected by the addition of high-strength hexagonal bolts, the sealing component needs to add a component that is in direct contact with the pile driver. The processing shape of this component is annular and is made of Q235B steel plate with a thickness of 10mm. The center of the annular steel plate processing component is hollowed out to help reduce the overall deadweight of the sealing component and facilitate manual assembly and disassembly and horizontal transportation. In order to increase the rigidity of the sealing component, a supporting rib is set between the annular steel plate and the bottom steel plate, and the connection is fully welded. The supporting rib is made of Q235B steel plate with a thickness of 10mm.
[0048] Beneficial effects of the embodiments of the utility model: The embodiments of the utility model propose a sealing device suitable for the pile hole of a hollow pipe pile. The sealing device is used in the pile sinking stage after the pile head is buried in the soil. After the excavation of the foundation pit is completed, the sealing device is removed. The soil pollution problem caused by improper consideration of the pile hole plugging measures is effectively avoided. This embodiment has made further progress in terms of self-weight and structural strength compared to the prior art. The main factor to be considered in terms of self-weight is the thickness of the steel plate used for the sealing device: if the hollow structure of the double-layer steel plate is not adopted, when a single-layer steel plate is adopted, the entire bolt head needs to be buried below the top surface of the steel plate, because during the pile sinking process, the pile driver needs to be consistent with the longitudinal center line of the pile body. The bolt head is exposed on the top surface of the steel plate. First, due to its influence, the pile driver may deviate from the longitudinal center line of the pile body; second, the pile driver directly applies pressure to the bolt, which may cause damage to the bolt. To avoid this problem, the thickness of the steel plate needs to consider the thickness of the bolt head itself. Taking the PHC-500 (125) AB pile type as an example, M27 bolts are used, the bolt head thickness is about 20mm, the steel plate thickness (bolt head 20mm + pressure 10mm) is at least 30mm thick, and the weight can be calculated to be 46Kg. The weight of this hollow structure technical solution can be calculated to be 29Kg. If a conventional pile driver (6m long, outer diameter 38mm, wall thickness 35mm) is used when sinking piles, the hollowing size of the center of the annular steel plate can be appropriately increased on the basis of 250mm, then the width of the stiffening rib is also reduced accordingly, and the deadweight of the hollow structure can be reduced accordingly. In terms of the structural strength of this embodiment, 10 stiffening ribs are set in the middle of the double-layer steel plate, which are fully welded and connected, and the integrity of the structure is greatly enhanced. Manual horizontal short-distance transportation and assembly and disassembly can be considered. Compared with the labor cost of manually cleaning the pile hole in the later stage, it is much lower and is conducive to the control of the construction period. The sealing device in this embodiment refers to the pile type selection of the "Prestressed Concrete Pipe Pile Atlas" as a standard part, and can be considered for factory batch production, and it is a "zero loss" turnover material during the construction process. The most prominent features of the sealing device in this embodiment are light weight (can be manually assembled and disassembled), high reuse rate, low cost, and favorable construction period control.
[0049] The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, several equivalent substitutions or obvious deformations can be made, and the performance or use is the same, which should be regarded as belonging to the protection scope of the utility model. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, technicians in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.
Claims
1. A PHC pile head sealing device, characterized in that: It includes an annular steel plate, a bottom steel plate and a supporting rib plate. The annular steel plate is in the shape of an annulus, the bottom steel plate is circular, the bottom steel plate is arranged parallel to the bottom of the annular steel plate, the annular steel plate and the bottom steel plate are connected through the supporting rib plate, the annular steel plate and the bottom steel plate are of the same size, the bottom steel plate is used to fit and seal the pile head end plate, and a fixed connection portion is arranged on the bottom steel plate for connecting the pile head end plate of the PHC pipe pile head.
2. The PHC pile head sealing device according to claim 1, characterized in that: The inner diameter of the annular steel plate is 160 to 900 mm.
3. The PHC pile head sealing device according to claim 1, characterized in that: The fixed connection portion includes bolt holes, and the bolt holes are arranged in a circular array concentric with the bottom steel plate.
4. The PHC pile head sealing device according to claim 3, characterized in that: The number of the bolt holes is 10.
5. The PHC pile head sealing device according to claim 1, characterized in that: The supporting ribs are arranged in a "M" shape.
6. The PHC pile head sealing device according to claim 1, characterized in that: The support ribs have a height of 50 to 100 mm and a length of 58 to 133 mm.
7. The PHC pile head sealing device according to claim 1, characterized in that: The thickness of the annular steel plate and the supporting ribs is 10 to 16 mm, and the thickness of the bottom steel plate is 10 to 12 mm.
8. A PHC pile head, characterized in that: It comprises a pile head end plate and a PHC pipe pile head sealing device as described in any one of claims 1 to 7, wherein the bottom steel plate is detachably connected to the top of the pile head end plate through a fixed connection portion, and the diameter of the bottom steel plate is consistent with the diameter of the pile head end plate.
9. The PHC pile head according to claim 8, characterized in that: The fixed connection portion includes a bolt hole, and the pile head end plate includes a main reinforcement anchor hole. The number, diameter and arrangement of the main reinforcement anchor holes are consistent with those of the bolt holes, and each of the main reinforcement anchor holes is concentrically aligned with the bolt hole. The bottom steel plate is connected to the pile head end plate by means of hexagonal bolts, and the hexagonal bolts pass through the bolt holes and are screwed into the main reinforcement anchor holes.