A pile long-term service performance testing device
By designing a long-term service performance testing device for piles, the device uses a lateral movement unit and a downward pressure unit to simulate the lateral movement of vehicles on the piles, combined with silicone oil to simulate soil fixation. This solves the problems of traditional testing methods being time-consuming, labor-intensive, and inaccurate, and achieves efficient and accurate pile performance testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE SECOND CONSTR OF CHINA CONSTR EIGHTH ENG DIV
- Filing Date
- 2025-06-04
- Publication Date
- 2026-07-10
AI Technical Summary
Traditional methods for testing pile performance are time-consuming and labor-intensive, and cannot fully and accurately reflect the actual service condition of the pile. Existing laboratory testing equipment cannot simulate the downward pressure exerted on the pile by vehicles on real road surfaces.
Design a long-term service performance testing device for piles. The device simulates the lateral reciprocating motion of a vehicle on the pile through a lateral movement unit and a downward pressure unit. It combines silicone oil to simulate the fixation of the pile foundation in the soil to ensure that the vertical force and pressure remain unchanged. The device uses an electric telescopic rod or a hydraulic cylinder to provide the downward pressure.
It achieves a realistic simulation of the stress on the pile, improves the efficiency and accuracy of testing, and can more realistically reflect the long-term service performance of the pile.
Smart Images
Figure CN224478486U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building construction quality testing technology, specifically relating to a device for testing the long-term service performance of piles. Background Technology
[0002] As a crucial component of foundation structures, the service performance of piles directly impacts the safety and durability of the entire project. With advancements in engineering technology and the expansion of project scale, the loads borne by piles are becoming increasingly complex and variable. Coupled with the influence of environmental factors such as geological and climatic conditions, the service status assessment of piles has become particularly important.
[0003] Traditional methods for testing pile performance largely rely on manual on-site surveys, which are not only time-consuming and labor-intensive but also fail to comprehensively and accurately reflect the actual service condition of the piles. Existing laboratory-based long-term pile performance testing devices mostly use single-point pressure applied by hydraulic rods to test pile performance. However, this method of force application differs from the pressure exerted on the piles by vehicles moving on the bridge deck in real-world applications. Therefore, a performance testing device that can accurately reflect the long-term service performance of piles in actual applications is needed to address these issues. Utility Model Content
[0004] To address the problems existing in the prior art, a device for testing the long-term service performance of piles is proposed.
[0005] The technical solution of this utility model to solve the technical problem is as follows: a long-term service performance testing device for piles includes a base, a support frame connected to the base, a transverse unit connected to the support frame, the transverse unit being driven by a drive unit connected to the support frame; a pressing unit is connected to the bottom of the transverse unit, the pressing end of the pressing unit is connected to a rolling unit, the bottom of the rolling unit presses on the pile foundation, and the pile foundation is located on the base.
[0006] Preferably, the lateral movement unit includes a crossbar slidably connected to the support frame, a limiting groove is opened in the middle of the crossbar, a drive disk is rotatably connected to the support frame, a protrusion is connected to the drive disk, and the protrusion can move perpendicular to the crossbar along the limiting groove; a vertical rod is connected to the bottom of the crossbar, and the vertical rod is connected to the pressing unit.
[0007] Preferably, it also includes a guide unit, which can provide guidance for the transverse movement unit; the guide unit includes two guide seats fixed on the support frame, and the crossbar passes through the two guide seats in sequence and slides along the two guide seats; a vertical sliding groove is opened at the top of the support frame, and the vertical rod passes through the sliding groove and can slide along the sliding groove.
[0008] Preferably, the drive unit is a drive motor, which is fixed on the support frame, and the output end of the drive motor passes through the support frame and is connected to the drive disk.
[0009] Preferably, a recess is made on the base, the recess is filled with silicone oil, and the bottom of the pile foundation is located in the recess; a sealing cap is fitted on the pile foundation, and the sealing cap is pressed onto the recess by a clamping component.
[0010] Preferably, a soft membrane is attached to the outer wall of the pile foundation that is submerged in silicone oil to prevent silicone oil from seeping into the pile foundation.
[0011] Preferably, a sealing gasket is connected to the bottom of the sealing cap.
[0012] Preferably, the clamping assembly includes two clamping blocks, which are combined to form a frustum shape. The pile foundation is located between the two clamping blocks, and the two clamping blocks press against the sealing cover. Threaded rods are threadedly connected to the support frames at both ends. One end of the threaded rod is rotatably connected to a top block, which presses against the outer inclined surface of the clamping block, so that the clamping block clamps the pile foundation while pressing it into the sealing cover. The other end of the threaded rod is connected to a drive handle.
[0013] Preferably, the threaded rod is provided with an outer nut and an inner nut. The outer nut is located on the outside of the support frame, and the inner nut is located on the inside of the support frame. The outer nut and the inner nut clamp the support frame to limit the position of the threaded rod.
[0014] Preferably, the pressing unit is an electric telescopic rod or a hydraulic cylinder.
[0015] Compared with existing technologies, the above technical solution has the following advantages or beneficial effects:
[0016] 1. This utility model can simulate the force generated when a vehicle passes over a pile foundation in a location such as a bridge by using a transverse displacement unit. Compared with the traditional single-point pressure, it can better reflect the real stress situation and more accurately reflect the real material properties of the pile foundation.
[0017] 2. This utility model achieves simultaneous clamping of the pile foundation and sealing cover by pressing the top block against the clamping block, which ensures both the vertical force on the pile foundation and the constant pressure in the pit, thus improving inspection efficiency and accuracy. Attached Figure Description
[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0019] Figure 1 This is a schematic diagram of the structure of this utility model.
[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle.
[0021] Figure 3 It is a cross-sectional view inside the recess.
[0022] Explanation of reference numerals in the attached figures:
[0023] 1. Base; 11. Recess; 12. Silicone oil; 13. Soft membrane; 2. Support frame; 3. Lateral movement unit; 31. Crossbar; 33. Limiting groove; 34. Protrusion; 35. Drive disc; 36. Drive unit; 37. Vertical rod; 4. Pressing unit; 5. Rolling unit; 6. Pile foundation; 7. Clamping assembly; 71. Threaded rod; 72. Outer nut; 73. Top block; 74. Inner nut; 75. Drive handle; 8. Clamping block; 9. Sealing cover; 91. Sealing gasket; 10. Guide unit; 101. Guide seat; 102. Sliding groove. Detailed Implementation
[0024] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing techniques and processes to avoid unnecessarily limiting the present invention. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Example 1:
[0026] Please see Figures 1-3In order to achieve a realistic simulation test of the long-term service performance of the pile itself and ensure that its stress is similar to that of the real environment, a pile long-term service performance testing device is proposed in this embodiment. The device includes a base 1, a support frame 2 connected to the base 1, a transverse unit 3 connected to the support frame 2, and the transverse unit 3 being driven by a drive unit 36 connected to the support frame 2. The bottom of the transverse unit 3 is connected to a pressing unit 4, and the pressing end of the pressing unit 4 is connected to a rolling unit 5. The bottom of the rolling unit 5 presses on the pile foundation 6, and the pile foundation 6 is located on the base 1.
[0027] The transverse unit 3 in this embodiment includes a crossbar 31 slidably connected to the support frame 2. A limiting groove 33 is formed in the middle of the crossbar 31, and a drive disk 35 is rotatably connected to the support frame 2. A protrusion 34 is connected to the drive disk 35, and the protrusion 34 can move perpendicularly to the crossbar 31 along the limiting groove 33. A vertical rod 37 is connected to the bottom of the crossbar 31, and the vertical rod 37 is connected to the pressing unit 4. The pressing unit 4 in this embodiment is an electric telescopic rod or a hydraulic cylinder.
[0028] In addition, the transverse unit 3 also includes a guide unit 10, which can provide guidance for the transverse unit 3. The guide unit 10 includes two guide seats 101 fixed on the support frame 2. The crossbar 31 passes through the two guide seats 101 in sequence and slides along the two guide seats 101. A vertical sliding groove 102 is opened at the top of the support frame 2. The vertical rod 37 passes through the sliding groove 102 and can slide along the sliding groove 102.
[0029] In this embodiment, the drive unit 36 is a drive motor, which is fixed on the support frame 2. The output end of the drive motor passes through the support frame 2 and is connected to the drive disk 35.
[0030] While applying pressure to the pile foundation 6 through the pressing unit 4, the rolling unit 5 and the lateral moving unit 3 achieve lateral reciprocating motion, simulating the uneven pressure on the top of the pile foundation 6 when a vehicle passes by, thus achieving a more realistic simulation effect.
[0031] Example 2:
[0032] Continue reading Figures 1-3 The rest is the same as in Embodiment 1, except that: in order to simulate the environment in which the bottom of the pile foundation 6 is buried in the soil, in this embodiment, a pit 11 is opened on the base 1, the pit 11 is filled with silicone oil 12, the bottom of the pile foundation 6 is placed in the pit 11, and a soft film 13 that can prevent the silicone oil 12 from seeping into the pile foundation 6 is attached to the outer wall of the pile foundation 6 submerged in the silicone oil 12; a sealing cap 9 is fitted on the pile foundation 6, the bottom of the sealing cap 9 is connected to a sealing gasket 91, and the sealing cap 9 is pressed on the pit 11 by the pressing component 7, thereby simulating that the bottom of the pile foundation 6 is fixed in the soil.
[0033] The clamping assembly 7 in this embodiment includes two clamping blocks 8, which are combined to form a frustum shape. The pile foundation 6 is located between the two clamping blocks 8, and the two clamping blocks 8 press against the sealing cover 9. Threaded rods 71 are threadedly connected to the support frames 2 at both ends. One end of the threaded rod 71 is rotatably connected to a top block 73, which abuts against the outer inclined surface of the clamping block 8, so that the clamping block 8 clamps the pile foundation 6 while pressing it into the sealing cover 9. The other end of the threaded rod 71 is connected to a drive handle 75. The clamping assembly 7 ensures that the pile foundation 6 is vertical, and that the downward pressure is perpendicular to the pile foundation 6.
[0034] In addition, the threaded rod 71 is provided with an outer nut 72 and an inner nut 74. The outer nut 72 is located on the outside of the support frame 2, and the inner nut 74 is located on the inside of the support frame 2. The outer nut 72 and the inner nut 74 clamp the support frame 2 to limit the position of the threaded rod 71.
[0035] How to use:
[0036] First, after wrapping the outer wall of the pile foundation 6 with a soft membrane 13, it is placed in the pit 11. Silicone oil 12 is filled into the pit 11, and the sealing cap 9 is placed on the outer wall of the pile foundation 6 and on the pit 11. Then, two clamping blocks 8 are placed on the sealing cap 9, aligned with the clamping components 7 on both sides. The rotating drive handle drives the threaded rod 71 to rotate inward. The threaded rod 71 drives the top block 73 to squeeze the clamping blocks 8. The clamping blocks 8 generate a clamping force that holds the pile foundation 6 in opposite directions and a downward pressure, ensuring that the pile foundation 6 is vertical while sealing the pit 11 and ensuring that the internal pressure remains constant. Finally, the downward pressure unit 4 is started to apply downward pressure to the pile foundation 6, and the drive motor is started to drive the rolling unit 5 to roll laterally back and forth, applying downward pressure to move the pile foundation 6.
[0037] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.
Claims
1. A device for testing the long-term service performance of piles, characterized in that: Includes a base (1), a support frame (2) connected to the base (1), a transverse unit (3) connected to the support frame (2), the transverse unit (3) being driven by a drive unit (36) connected to the support frame (2); the bottom of the transverse unit (3) is connected to a pressing unit (4), the pressing end of the pressing unit (4) is connected to a rolling unit (5), the bottom of the rolling unit (5) is pressed onto the pile foundation (6), and the pile foundation (6) is located on the base (1).
2. The long-term service performance testing device for piles according to claim 1, characterized in that: The transverse unit (3) includes a crossbar (31) slidably connected to the support frame (2), a limiting groove (33) is opened in the middle of the crossbar (31), a drive disk (35) is rotatably connected to the support frame (2), a protrusion (34) is connected to the drive disk (35), and the protrusion (34) can move perpendicular to the crossbar (31) along the limiting groove (33); a vertical rod (37) is connected to the bottom of the crossbar (31), and the vertical rod (37) is connected to the pressing unit (4).
3. The long-term service performance testing device for piles according to claim 2, characterized in that: It also includes a guide unit (10), which can provide guidance for the transverse unit (3); the guide unit (10) includes two guide seats (101) fixed on the support frame (2), and the crossbar (31) passes through the two guide seats (101) in sequence and slides along the two guide seats (101); the top of the support frame (2) has a vertically through sliding groove (102), and the vertical rod (37) passes through the sliding groove (102) and can slide along the sliding groove (102).
4. The long-term service performance testing device for piles according to claim 1, characterized in that: The drive unit (36) is a drive motor, which is fixed on the support frame (2). The output end of the drive motor passes through the support frame (2) and is connected to the drive disk (35).
5. The long-term service performance testing device for piles according to claim 1, characterized in that: A recess (11) is made on the base (1), and the recess (11) is filled with silicone oil (12). The bottom of the pile foundation (6) is located in the recess (11). A sealing cover (9) is fitted on the pile foundation (6), and the sealing cover (9) is pressed on the recess (11) by the pressing component (7).
6. The long-term service performance testing device for piles according to claim 5, characterized in that: The outer wall of the pile foundation (6) submerged in silicone oil (12) is covered with a soft membrane (13) that can prevent silicone oil (12) from seeping into the pile foundation (6).
7. The long-term service performance testing device for piles according to claim 5, characterized in that: The sealing cap (9) is connected to the sealing gasket (91) at the bottom.
8. The long-term service performance testing device for piles according to claim 5, characterized in that: The clamping assembly (7) includes two clamping blocks (8), which are combined to form a frustum shape. The pile foundation (6) is located between the two clamping blocks (8), and the two clamping blocks (8) press on the sealing cover (9). Threaded rods (71) are threadedly connected to the support frames (2) at both ends. One end of the threaded rod (71) is rotatably connected to the top block (73), and the top block (73) presses against the outer inclined surface of the clamping block (8), so that the clamping block (8) clamps the pile foundation (6) and presses it into the sealing cover (9). The other end of the threaded rod (71) is connected to the drive handle (75).
9. The long-term service performance testing device for piles according to claim 8, characterized in that: The threaded rod (71) is provided with an outer nut (72) and an inner nut (74). The outer nut (72) is located on the outside of the support frame (2), and the inner nut (74) is located on the inside of the support frame (2). The outer nut (72) and the inner nut (74) clamp the support frame (2) to achieve the limiting of the threaded rod (71).
10. The long-term service performance testing device for piles according to claim 1, characterized in that: The pressing unit (4) is an electric telescopic rod or a hydraulic cylinder.