Quasi-circular precast pile and pile splicing structure
Through the design of circular prefabricated piles and the steel bar design with rounded corners and circular distribution, the problems of prone to cracking and restricted reinforcement rate of existing square prefabricated piles are solved, and strength improvement and steel utilization rate are achieved.
Patent Information
- Application Number
- CN202421013238.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing square prefabricated piles are prone to cracking due to stress concentration during production, transportation and construction, which affects the strength and durability of the pile body. At the same time, the cross-section of the steel cage is still square, and the number of main ribs must be multiples of 4, resulting in reinforcement. The rate is limited, resulting in waste of steel.
The design of a round-like prefabricated pile is adopted. The four corners of the square pile body are rounded corners, and a steel cage is buried inside. The main ribs are distributed in a circular shape against the center of the square pile body. The stirrups are wrapped around the outside of the main rib, and the number of main ribs is not limited to multiples of 4. , more flexible reinforcement.
The rounded corner design avoids stress concentration, improves the strength and durability of the pile body; flexibly configures steel bars to reduce steel waste and improves the flexibility of reinforcement rate.
Smart Images
Figure CN222456056U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of prefabricated concrete components, in particular to a quasi-circular prefabricated pile and a pile connection structure. Background Art
[0002] At present, with the rapid development of urban construction in my country, prestressed concrete piles are widely used in industrial and civil buildings, municipal bridges, highways and other infrastructure fields. The common precast piles are mostly circular tubular and square cross-sections. Square piles have the characteristics of large side friction resistance and higher bearing capacity when subjected to tension and compression conditions. However, the four right angles of square piles are prone to cracking due to stress concentration during production, transportation and construction, affecting the strength and durability of the pile body.
[0003] For this reason, some square piles with special shapes have appeared on the market. For example, the Chinese utility model patent with publication number CN202658597U discloses a hollow square pile with flexible reinforcement. The four corners of the cross section of the pile are rounded to solve the problem of easy cracking. However, the cross section of the steel cage is still square, and the number of main bars must be a multiple of 4, which results in a certain restriction on the reinforcement ratio. On the basis of meeting the prestressing requirements of the pile body, the reinforcement ratio of some pile types is too large, which will cause unnecessary waste of steel. Utility Model Content
[0004] The utility model provides a quasi-circular prefabricated pile and a pile connection structure, which can reasonably configure steel bars according to the pre-compression stress requirements of the product and avoid unnecessary waste of steel materials.
[0005] In order to solve the above problems, the utility model adopts the following technical solutions:
[0006] According to the first aspect of the utility model, an embodiment of the utility model provides a quasi-circular precast pile, including a solid square pile body, the four corners of the square pile body are all chamfered, a steel cage is buried in the square pile body, the steel cage includes a plurality of main bars and stirrups, the main bars are distributed in a circle relative to the center of the square pile body, and the stirrups are wound around the outside of the main bars.
[0007] In some embodiments, the ratio of the radius of the rounded corner to the width of the square pile body is 1 / 5-1 / 3.
[0008] In some embodiments, end plates are fixed to both ends of the square pile body, and both ends of the main reinforcement are anchored and fixed to the two end plates respectively.
[0009] According to the second aspect of the utility model, an embodiment of the utility model provides a pile connection structure, including the quasi-circular precast piles described in any one of the first aspects above, wherein one quasi-circular precast pile is located above another quasi-circular precast pile; an upper end plate is fixed to the bottom surface of the square pile body located above, and a lower end plate is fixed to the top surface of the square pile body located below, and the upper end plate and the lower end plate are welded and fixed.
[0010] According to the third aspect of the utility model, an embodiment of the utility model provides a pile connection structure, comprising two quasi-circular precast piles as described in any one of the first aspects above, wherein one quasi-circular precast pile is located above the other quasi-circular precast pile; a downwardly extending insertion rod is fixed to the bottom of the square pile body located above, a snap-on tube is sleeved on the insertion rod, and the snap-on tube has elastic fins that can be radially opened outward or contracted inward; a lower sleeve is fixed to the top of the square pile body located below, and a convex ring is provided on the inner wall of the lower sleeve; during the process of inserting the insertion rod into the lower sleeve, the elastic fins contract inwardly to allow the snap-on tube to pass through the convex ring, and after the snap-on tube passes through the convex ring, the elastic fins open outwardly to snap into the convex ring.
[0011] In some embodiments, an upper sleeve is embedded in the bottom of the upper square pile body, the main reinforcement in the upper square pile body is anchored to the upper sleeve, and the upper end of the insertion rod is fixed in the upper sleeve; the main reinforcement in the lower square pile body is anchored to the lower sleeve.
[0012] In some embodiments, the insertion rod is threadedly connected to the upper sleeve, and the buckle tube is threadedly connected to the insertion rod.
[0013] According to a fourth aspect of the utility model, an embodiment of the utility model provides a pile connection structure, comprising two quasi-circular precast piles as described in any one of the above-mentioned first aspects, wherein one quasi-circular precast pile is located above the other quasi-circular precast pile; an upper end plate is fixed to the bottom surface of the square pile body located above, and a plug rod extending downward is fixed to the upper end plate, and a snap tube is sleeved on the plug rod, and the snap tube has elastic fins that can be radially opened outward or contracted inward; a lower end plate is fixed to the top surface of the square pile body located below, and the lower end plate is provided with a through hole penetrating therethrough, and a lower connecting hole docking with the through hole is provided on the top surface of the square pile body located below, and the aperture of the through hole is smaller than the aperture of the lower connecting hole; in the process of inserting the plug rod into the through hole, the elastic fin contracts inwardly to allow the snap tube to pass through the lower end plate, and after the snap tube passes through the lower end plate, the elastic fin opens outwardly to be snapped with the lower end plate.
[0014] In some embodiments, the insertion rod is threadedly connected to the upper end plate, and the buckle tube is threadedly connected to the insertion rod.
[0015] In some embodiments, the main reinforcement in the upper square pile body is anchored to the upper end plate, and the main reinforcement in the lower square pile body is anchored to the lower end plate.
[0016] The utility model has at least the following beneficial effects: the quasi-circular prefabricated pile of the utility model comprises a square pile body, the four corners of the square pile body are all chamfered, the main reinforcement embedded in the square pile body is distributed in a circle relative to the center of the square pile body, the number of main reinforcement is not limited to multiples of 4, the number of reinforcement is more flexible, the steel bars can be reasonably configured according to the pre-stress requirements of the product, and unnecessary waste of steel can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic cross-sectional view of a quasi-circular prefabricated pile according to an embodiment of the utility model;
[0018] Figure 2 A schematic cross-sectional view of a quasi-circular prefabricated pile according to an embodiment of the utility model;
[0019] Figure 3 This is a schematic diagram of the end face of a quasi-circular prefabricated pile according to an embodiment of the utility model;
[0020] Figure 4 This is a structural schematic diagram of a pile connection structure according to an embodiment of the utility model;
[0021] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;
[0022] Figure 6 It is a structural schematic diagram of a pile connection structure according to another embodiment of the utility model.
[0023] Wherein, the accompanying drawings are marked as follows:
[0024] A square pile body 100, an upper pile section 101, a lower pile section 102, a lower connecting hole 103, and a rounded corner 110;
[0025] Steel cage 200, main reinforcement 210, stirrups 220;
[0026] Upper sleeve 310, lower sleeve 320, convex ring 321;
[0027] Insert rod 400;
[0028] Buckle tube 500, elastic fin 510;
[0029] Upper end plate 610 and lower end plate 620 . DETAILED DESCRIPTION
[0030] The utility model provides the following description with reference to the accompanying drawings to help fully understand the various embodiments of the utility model as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the utility model.
[0031] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0032] It will be understood that when one element (eg, a first element) is “connected” to another element (eg, a second element), the element may be directly connected to the other element or an intervening element (eg, a third element) may be present between the element and the other element.
[0033] The embodiment of the utility model provides a quasi-circular prefabricated pile, such as Figure 1 and Figure 2 As shown, the square pile body 100 includes a solid square pile body 100, which is made of concrete. Compared with hollow square piles and pipe piles, the solid pile design has better mechanical properties in terms of shear resistance, bending resistance and pressure resistance. When the pile top is connected to the pedestal, the solid pile does not need to be core-filled according to the requirements of the specifications, which saves the core-filling process that brings about long construction period, high cost, and difficulty in ensuring the quality of the core-filling.
[0034] The four corners of the square pile body 100 are all chamfered 110, so that the cross-sectional shape of the square pile body 100 is a square with chamfered corners. The chamfered corners 110 can extend along the length direction of the square pile body 100 and spread over the entire square pile body 100. The chamfered corners 110 can avoid stress concentration at the four corners of the square pile body 100, and concrete cracking is not likely to occur during production, transportation and construction. At the same time, the chamfered corners 110 are easier to demould than right angles when demoulding after the concrete solidifies, and the appearance is smooth and has no pockmarks.
[0035] A steel cage 200 is embedded in the square pile body 100. The steel cage 200 includes a plurality of main bars 210 and stirrups 220. The main bars 210 are distributed in a circular shape relative to the center of the square pile body 100. The stirrups 220 are wound on the outside of the main bars 210. Specifically, the stirrups 220 can be wound in a spiral shape or in other shapes. Therefore, the number of main bars 210 in this embodiment is not limited to multiples of 4, and the number of reinforcements is more flexible. The steel bars can be reasonably configured according to the prestress requirements of the product to avoid unnecessary waste of steel. At the same time, the entire steel cage 200 is cylindrical in structure. When the cylindrical steel cage is automatically roll-welded with spiral stirrups, the welding points between the main bars 210 and the stirrups 220 can be uniform and reliable, which can better ensure product quality.
[0036] In some embodiments, Figure 3 As shown, the ratio of the radius R of the chamfer 110 to the width L of the square pile body 100 is 1 / 5-1 / 3. Compared with the existing square piles with chamfers, the size of the chamfer 110 of this embodiment is larger, so that the cross-sectional shape of the entire square pile body 100 is similar to a circle, which makes it less likely for concrete to crack during production, transportation and construction, and further facilitates demoulding.
[0037] Further, the radius of the rounded corner 110 may be 100-200 mm, and the width of the square pile body 100 may be 300-1000 mm. Preferably, the radius of the rounded corner 121 is 150 mm, and the width of the square pile body 100 is 600 mm.
[0038] In some embodiments, the main reinforcement 210 is evenly distributed in a circular shape relative to the center of the square pile body 100, so that the force exerted by the main reinforcement 210 on the concrete of the square pile body 100 is more uniform. Figure 1 As shown, 9 main ribs 210 may be provided. Of course, other numbers may be provided according to actual needs.
[0039] In some embodiments, both ends of the square pile body 100 are fixed with end plates, and both ends of the main reinforcement 210 are anchored and fixed to the two end plates respectively. When producing the pile, firstly, the two ends of all the main reinforcements 210 are headed; then, all the main reinforcements 210 and the stirrups 220 are roll-welded by an automatic roll welding machine to form an integrated steel cage, and the workers install the heads at both ends of the steel cage in the countersunk holes of the end plates; the tensioning plate and the end plates are connected by tensioning screws, and the tensioning machine drives the end plates to move forward to stretch the steel bars and give them prestress; after the tensioning is completed, the material laying, vibration forming, steam curing, autoclaving and other processes are carried out to form the component.
[0040] An embodiment of the utility model provides a pile connection structure, including two quasi-circular precast piles of any of the above embodiments. The specific description of the quasi-circular precast piles can refer to the above embodiments and will not be repeated here. One of the quasi-circular precast piles is located above the other quasi-circular precast pile. For the convenience of description, the square pile body of the quasi-circular precast pile located above is named as an upper section pile, and the square pile body of the quasi-circular precast pile located below is named as a lower section pile. An upper end plate is fixed to the bottom surface of the upper section pile, and a lower end plate is fixed to the top surface of the lower section pile. The upper end plate and the lower end plate are welded and fixed to achieve pile connection.
[0041] The embodiment of the utility model provides a pile connection structure, such as Figure 4 and Figure 5 As shown, it includes two quasi-circular precast piles of any of the above embodiments. The specific description of the quasi-circular precast piles can refer to the above embodiments and will not be repeated here. One of the quasi-circular precast piles is located above the other quasi-circular precast pile. For the convenience of description, the square pile body of the quasi-circular precast pile located above is named as an upper section pile 101, and the square pile body of the quasi-circular precast pile located below is named as a lower section pile 102.
[0042] A plunger 400 extending downward is fixed to the bottom of the upper pile 101, and a buckle barrel 500 is sleeved on the plunger 400. The buckle barrel 500 has elastic fins 510 that can be radially expanded outward or contracted inward. A plurality of elastic fins 510 can be provided and arranged around the center of the buckle barrel 500, and the elastic fins 510 can extend obliquely upward. A lower sleeve 320 is fixed to the top of the lower pile 102, and a convex ring 321 is provided on the inner wall of the lower sleeve 320. The convex ring 321 can surround the inner wall of the lower sleeve 320, and the existence of the convex ring 321 is equivalent to reducing the inner diameter of the lower sleeve 320.
[0043] When the upper pile 101 and the lower pile 102 need to be docked, the insertion rod 400 is inserted into the lower sleeve 320. During the insertion process, the elastic fins 510 are squeezed and contracted inwardly, so that the buckle tube 500 can smoothly pass through the convex ring 321. After the buckle tube 500 passes through the convex ring 321, the elastic fins 510 will be elastically reset, thereby opening outwards, and then abutting against the bottom of the convex ring 321, and achieving a clamping connection with the convex ring 321, and the insertion rod 400 is difficult to be pulled out of the lower sleeve 320. In this embodiment, the insertion rod 400 only needs to be aligned with the lower sleeve 320 and inserted into the lower sleeve 320 to complete the docking, which can achieve the rapid connection of the upper pile 101 and the lower pile 102. At the same time, the clamping method can limit the insertion rod 400 from being separated from the lower sleeve 320, ensuring the stability of the connection.
[0044] In some embodiments, an upper sleeve 310 is embedded in the bottom of the upper pile 101, and the upper sleeve 310 can be anchored in concrete. The main reinforcement 210 in the upper pile 101 is anchored to the upper sleeve 310 to stabilize and fix the upper sleeve 310 to prevent it from dislocating. The upper end of the plunger 400 is fixed in the upper sleeve 310. The main reinforcement 210 in the lower pile 102 is anchored to the lower sleeve 320 to stabilize and fix the lower sleeve 320 to prevent it from dislocating.
[0045] Furthermore, the insertion rod 400 is threadedly connected to the upper sleeve 310, and the buckle tube 500 is threadedly connected to the insertion rod 400, both of which adopt a detachable structure to facilitate installation and disassembly.
[0046] The embodiment of the utility model also provides another pile connection structure, such as Figure 6 As shown, it includes two quasi-circular precast piles of any of the above embodiments. The specific description of the quasi-circular precast piles can refer to the above embodiments and will not be repeated here. One of the quasi-circular precast piles is located above the other quasi-circular precast pile. For the convenience of description, the square pile body of the quasi-circular precast pile located above is named as an upper section pile 101, and the square pile body of the quasi-circular precast pile located below is named as a lower section pile 102.
[0047] The upper end plate 610 is fixed to the bottom surface of the upper section pile 101, and the upper end plate 610 is fixed with a plunger 400 extending downward, and a buckle tube 500 is sleeved on the plunger 400. The buckle tube 500 has elastic fins 510 that can be radially expanded outward or contracted inward. A plurality of elastic fins 510 can be provided and arranged around the center of the buckle tube 500, and the elastic fins 510 can extend obliquely upward. The lower end plate 620 is fixed to the top surface of the lower section pile 102, and the lower end plate 620 is provided with a through hole. The top surface of the lower section pile 102 is provided with a lower connecting hole 103 that is connected to the through hole, and the aperture of the through hole is smaller than the aperture of the lower connecting hole 103.
[0048] When the upper pile 101 and the lower pile 102 need to be docked, the insertion rod 400 is inserted into the perforation. During the insertion process, the elastic fin 510 is squeezed and contracts inwardly, so that the buckle tube 500 passes through the lower end plate 620. After the buckle tube 500 passes through the lower end plate 620, the elastic fin 510 will be elastically reset, thereby opening outward, and then abutting against the bottom of the lower end plate 620, and achieving a clamping connection with the lower end plate 620, and the insertion rod 400 is difficult to be pulled out of the lower pile 102. In this embodiment, only the insertion rod 400 needs to be aligned with the perforation of the lower end plate 620 and inserted into the perforation of the lower end plate 620 to complete the docking, which can realize the rapid connection of the upper pile 101 and the lower pile 102. At the same time, the clamping method can limit the insertion rod 400 from being separated from the lower end plate 620, ensuring the stability of the connection.
[0049] In some embodiments, the insertion rod 400 is threadedly connected to the upper end plate 610, and the buckle tube 500 is threadedly connected to the insertion rod 400, both of which adopt a detachable structure to facilitate installation and disassembly.
[0050] In some embodiments, the main reinforcement in the upper pile section 101 is anchored to the upper end plate 610, and the main reinforcement in the lower pile section 102 is anchored to the lower end plate 620. Specifically, the two ends of the main reinforcement can be headed, and then all the main reinforcements and stirrups are roll-welded by an automatic roll welding machine to form an integrated steel cage, and then the heads at both ends of the steel cage are installed in the countersunk holes of the end plate to complete the connection.
[0051] The terms and words used in the above description and claims are not limited to the literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the utility model. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the utility model is provided only for illustration, and not for limiting the utility model as defined by the attached claims and their equivalents.
Claims
1. A quasi-circular prefabricated pile, characterized in that: The invention comprises a solid square pile body, the four corners of which are all chamfered, a steel cage is embedded in the square pile body, the steel cage comprises a plurality of main bars and stirrups, the main bars are distributed in a circle relative to the center of the square pile body, and the stirrups are wound around the outside of the main bars.
2. The quasi-circular prefabricated pile according to claim 1, characterized in that: The ratio of the radius of the rounded corner to the width of the square pile body is 1 / 5-1 / 3.
3. The quasi-circular prefabricated pile according to claim 1, characterized in that: End plates are fixed at both ends of the square pile body, and both ends of the main reinforcement are anchored and fixed to the two end plates respectively.
4. A pile connection structure, characterized in that: It comprises two quasi-circular precast piles as claimed in claim 1 or 2, wherein one quasi-circular precast pile is located above the other quasi-circular precast pile; an upper end plate is fixed to the bottom surface of the square pile body located above, and a lower end plate is fixed to the top surface of the square pile body located below, and the upper end plate and the lower end plate are welded and fixed.
5. A pile connection structure, characterized in that: It comprises two quasi-circular precast piles as claimed in claim 1 or 2, wherein one quasi-circular precast pile is located above the other quasi-circular precast pile; a downwardly extending insertion rod is fixed to the bottom of the square pile body located above, a snap-on tube is sleeved on the insertion rod, and the snap-on tube has elastic fins that can be radially expanded outward or contracted inward; a lower sleeve is fixed to the top of the square pile body located below, and a convex ring is provided on the inner wall of the lower sleeve; during the process of inserting the insertion rod into the lower sleeve, the elastic fin contracts inwardly to allow the snap-on tube to pass through the convex ring, and after the snap-on tube passes through the convex ring, the elastic fin opens outwardly to engage with the convex ring.
6. The pile connection structure according to claim 5, characterized in that: An upper sleeve is embedded in the bottom of the upper square pile body, the main reinforcement in the upper square pile body is anchored to the upper sleeve, and the upper end of the insertion rod is fixed in the upper sleeve; the main reinforcement in the lower square pile body is anchored to the lower sleeve.
7. The pile connection structure according to claim 6, characterized in that: The insert rod is threadedly connected to the upper sleeve, and the buckle tube is threadedly connected to the insert rod.
8. A pile connection structure, characterized in that: It comprises two quasi-circular precast piles as described in claim 1 or 2, wherein one quasi-circular precast pile is located above the other quasi-circular precast pile; an upper end plate is fixed to the bottom surface of the square pile body located above, the upper end plate is fixed with a plug rod extending downward, a snap tube is sleeved on the plug rod, and the snap tube has elastic fins that can be radially expanded outward or contracted inward; a lower end plate is fixed to the top surface of the square pile body located below, the lower end plate is provided with a through hole passing through, and the top surface of the square pile body located below is provided with a lower connecting hole docking with the through hole, the aperture of the through hole being smaller than the aperture of the lower connecting hole; in the process of inserting the plug rod into the through hole, the elastic fin contracts inwardly to allow the snap tube to pass through the lower end plate, and after the snap tube passes through the lower end plate, the elastic fin opens outwardly to snap into the lower end plate.
9. The pile connection structure according to claim 8, characterized in that: The insertion rod is threadedly connected to the upper end plate, and the buckle tube is threadedly connected to the insertion rod.
10. The pile connection structure according to claim 8, characterized in that: The main reinforcement in the upper square pile body is anchored to the upper end plate, and the main reinforcement in the lower square pile body is anchored to the lower end plate.
Citation Information
Patent Citations
Flexible reinforcement type hollow square pile
CN202658597U