Any-angle drawing loading device in transparent soil pile foundation model test

Abstract

The invention discloses an arbitrary-angle drawing and loading device in a transparent soil pile foundation model test. The arbitrary-angle drawing and loading device comprises an optical platform, a model groove, a model pile, a multi-angle loading reaction frame, a guide rail, a pulley block A, a pulley block B, a vertical upward-pulling device and a cable. The model groove is fixed to the optical platform, transparent soil is laid in the model groove, and a model pile is pre-buried in the transparent soil. And the multi-angle loading reaction frame is a U-shaped reaction frame, is fixed on the optical platform and is positioned right above the model groove, and two guide rails are arranged on the multi-angle loading reaction frame in parallel. The pulley block A and the pulley block B are arranged between the two guide rails and installed on the guide rails in a sliding mode through connecting assemblies. One end of the cable is connected with the vertical up-pulling device, and the other end of the cable is wound on the pulley block A and the pulley block B in sequence and extends out of the pulley block B to be connected with the model pile. According to the invention, the vertically upward pulling force provided by the external actuator is converted into pulling forces at different angles, so that the multi-angle oblique loading of the pile foundation is realized, and the model test cost is greatly saved.

Description

Technical Field

[0001] This invention relates to the field of pile foundation model testing technology, specifically to an arbitrary angle pull-out loading device for transparent soil pile foundation model testing. Background Technology

[0002] In existing studies, axial or horizontal loads are usually applied to the pile foundation by actuators to explore the bearing characteristics of the pile foundation under vertical or horizontal loads. However, in actual engineering, the pile foundation is often in a complex stress state. For example, offshore pile foundations must simultaneously bear the coupling effect of vertical buoyancy and horizontal wave loads, resulting in the pile foundation actually bearing oblique loads.

[0003] If such complex loads are to be simulated in indoor model tests, traditional methods require the fabrication of specialized steel trusses at various angles to fix the actuators, which greatly increases the complexity and cost of indoor model tests. Summary of the Invention

[0004] The purpose of this invention is to provide an arbitrary angle pull-out loading device for transparent soil pile foundation model tests, including an optical platform, a model groove, a model pile, a multi-angle loading reaction frame, a guide rail, pulley block A, pulley block B, a vertical pull-out device, and cables.

[0005] The model trough is placed on an optical platform, and transparent soil is laid inside the trough, with model piles pre-embedded in the transparent soil.

[0006] The multi-angle loading reaction frame is a U-shaped reaction frame, fixed on the optical platform, and located directly above the model slot. Two parallel guide rails, denoted as guide rail I and track II, are provided on the multi-angle loading reaction frame.

[0007] The pulley blocks A and B are spaced apart between the two guide rails and are slidably mounted on the two guide rails through the connecting components of the pulley blocks.

[0008] The pulley system A and pulley system B have the same structure.

[0009] One end of the cable is connected to the vertical pulling device, and the other end is wound around pulley block A and pulley block B in sequence, and extends out of pulley block B to connect with the model pile.

[0010] Furthermore, during the test, pulley block A was fixed on the guide rail, and by adjusting the position of pulley block B, multi-angle oblique loading of the pile foundation could be achieved.

[0011] Furthermore, during the test, the vertical upward pulling device was positioned directly above pulley block A.

[0012] Furthermore, the multi-angle loading reaction frame includes two U-shaped plates and two base plates. The two U-shaped plates are arranged in parallel, and their two ends are fixed to different base plates respectively.

[0013] Each of the two U-shaped plates is provided with a guide rail, which is a U-shaped hole structure that runs through the thickness direction of the U-shaped plate.

[0014] Furthermore, the pulley block A includes pulley I, pulley II, bearings, and a connecting assembly. The connecting assembly includes bolts and nuts.

[0015] The two ends of the outer ring of the bearing are respectively fitted into the inner holes of pulley I and pulley II. A cable is wound around the middle of the outer ring of the bearing, with one end of the cable connected to the vertical upward pulling device and the other end wound around the outer ring of the bearing of pulley group B.

[0016] The bolts pass through guide rail I, bearing inner ring and track II in sequence, and the pulley block A is fastened to the guide rail by the nut.

[0017] Furthermore, the dimensions of the guide rail are adapted to the dimensions of the bolt.

[0018] Furthermore, the base plate has screw holes, through which bolts pass to fix the multi-angle loading reaction frame onto the optical platform.

[0019] Furthermore, the cable is a fishing line.

[0020] Furthermore, the vertical upward pulling device is an actuator.

[0021] Furthermore, the model groove is a transparent acrylic model groove.

[0022] The technical effects of this invention are undeniable, and its beneficial effects are as follows:

[0023] Based on the principle that pulleys can change the direction of force, this invention can convert the vertical upward pulling force provided by the external actuator into a pulling force at different angles. This not only realizes multi-angle oblique loading of pile foundations, but also greatly saves the cost of model test. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the arbitrary angle pull-out loading device of the present invention;

[0025] Figure 2 This is a schematic diagram of the arbitrary angle pull-out loading device of the present invention;

[0026] In the diagram: 1. Model slot; 2. Model pile; 3. Multi-angle loading reaction frame; 4. Guide rail; 5. Pulley block A; 6. Pulley block B; 7. Vertical lifting device; 8. Cable. Detailed Implementation

[0027] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0028] Example 1:

[0029] An arbitrary angle pull-out loading device for a transparent soil pile foundation model test includes an optical platform, a model groove 1, a model pile 2, a multi-angle loading reaction frame 3, a guide rail 4, a pulley block A5, a pulley block B6, a vertical pull-out device 7, and a cable 8.

[0030] The model trough 1 is placed on an optical platform, and transparent soil is laid inside the trough, with model piles 2 pre-embedded in the transparent soil.

[0031] The multi-angle loading reaction frame 3 is a U-shaped reaction frame, fixed on the optical platform, and located directly above the model slot 1. Two parallel guide rails 4 are provided on the multi-angle loading reaction frame 3, which are denoted as guide rail I and track II, respectively.

[0032] The pulley blocks A5 and B6 are spaced apart between the two guide rails 4 and are slidably mounted on the two guide rails 4 through the pulley block connecting components.

[0033] The pulley blocks A5 and B6 have the same structure.

[0034] One end of the cable 8 is connected to the vertical pulling device 7, and the other end is wound around the pulley block A5 and pulley block B6 in sequence, and extends out of the pulley block B6 to connect with the model pile 2.

[0035] Example 2:

[0036] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, during the test, pulley block A5 is fixed on guide rail 4, and by adjusting the position of pulley block B6, multi-angle oblique loading of the pile foundation can be achieved.

[0037] Example 3:

[0038] The main structure of this embodiment is the same as any one of embodiments 1-2. Further, see [link to embodiment 1-2]. Figure 1 or Figure 2 During the test, the vertical upward pulling device 7 was located directly above the pulley block A5.

[0039] Example 4:

[0040] The main structure of this embodiment is the same as any one of embodiments 1 to 3. Further, see [link to embodiment 1]. Figure 2The multi-angle loading reaction frame 3 includes two U-shaped plates and two base plates. The two U-shaped plates are arranged in parallel, and their two ends are fixed to different base plates respectively.

[0041] Each of the two U-shaped plates is provided with a guide rail 4, and the guide rail 4 is a U-shaped hole structure that runs through the thickness direction of the U-shaped plate.

[0042] Example 5:

[0043] The main structure of this embodiment is the same as any one of embodiments 1 to 4. Further, the pulley block A5 includes pulley I, pulley II, bearings, and a connecting assembly. The connecting assembly includes bolts and nuts.

[0044] The two ends of the outer ring of the bearing are respectively fitted into the inner holes of pulley I and pulley II. A cable 8 is wound around the middle position of the outer ring of the bearing, and one end of the cable 8 is connected to the vertical upward pulling device 7, while the other end is wound around the outer ring of the bearing of pulley group B6.

[0045] The bolts pass through guide rail I, bearing inner ring and track II in sequence, and the pulley block A5 is fastened to guide rail 4 by nuts.

[0046] Example 6:

[0047] The main structure of this embodiment is the same as that of embodiment 5. Furthermore, the size of the guide rail 4 is adapted to the size of the bolt.

[0048] Example 7:

[0049] The main structure of this embodiment is the same as any one of embodiments 4 to 6. Furthermore, the base plate is provided with screw holes, and bolts pass through the screw holes to fix the multi-angle loading reaction frame 3 on the optical platform.

[0050] Example 8:

[0051] The main structure of this embodiment is the same as any one of embodiments 1 to 7. Furthermore, the cable 8 is a fishing line.

[0052] Example 9:

[0053] The main structure of this embodiment is the same as any one of embodiments 1 to 8. Furthermore, the vertical upward pulling device 7 is an actuator.

[0054] Example 10:

[0055] The main structure of this embodiment is the same as any one of embodiments 1 to 9. Furthermore, the model groove 1 is a transparent acrylic model groove.

[0056] Example 11:

[0057] The main structure of this embodiment is the same as any one of embodiments 1 to 10. Furthermore, this device aims to solve the problem that existing loading devices have difficulty in achieving multi-angle oblique pulling loading.

[0058] See Figure 1 The device includes a high-transparency acrylic model groove, a multi-angle loading reaction frame, model piles, pulley A, pulley B, pulley guide rails, and an optical platform.

[0059] Working principle: Pulleys A and B can move freely along the pulley guide rail, and either pulley can be fixed at any position on the pulley guide rail using a nut. By fixing pulley A directly below the external actuator and adjusting the position of pulley B, and by connecting the actuator, pulley A, and pulley B in sequence using a non-elastic steel wire rope or fishing line, the vertical pulling force provided by the actuator can be converted into tensile loads on the pile at different angles.

Claims

1. An arbitrary angle pull-out loading device for transparent soil pile foundation model tests, characterized in that: Includes an optical platform, a model slot (1), a model pile (2), a multi-angle loading reaction frame (3), a guide rail (4), a pulley block A (5), a pulley block B (6), a vertical lifting device (7), and cables (8); The model trough (1) is placed on an optical platform, and transparent soil is laid in the trough, with model piles (2) pre-embedded in the transparent soil. The multi-angle loading reaction frame (3) is a U-shaped reaction frame, fixed on the optical platform, and located directly above the model slot (1); two guide rails (4) are provided parallel to each other on the multi-angle loading reaction frame (3), which are respectively referred to as guide rail I and track II; The pulley group A (5) and pulley group B (6) are spaced apart between the two guide rails (4) and are slidably mounted on the two guide rails (4) through the pulley group connecting components; The pulley block A (5) and pulley block B (6) have the same structure; One end of the cable (8) is connected to the vertical pulling device (7), and the other end is wound around the pulley block A (5) and pulley block B (6) in sequence, and extends out of the pulley block B (6) to connect with the model pile (2).

2. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 1, characterized in that: During the test, pulley block A (5) was fixed on guide rail (4), and by adjusting the position of pulley block B (6), multi-angle oblique loading of the pile foundation could be achieved.

3. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 1 or 2, characterized in that: During the test, the vertical upward pulling device (7) was located directly above the pulley block A (5).

4. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 1, characterized in that: The multi-angle loading reaction frame (3) includes two U-shaped plates and two base plates; the two U-shaped plates are arranged in parallel and their ends are fixed to different base plates respectively; Each of the two U-shaped plates is provided with a guide rail (4), and the guide rail (4) is a U-shaped hole structure that runs through the thickness direction of the U-shaped plate.

5. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 1 or 4, characterized in that: The pulley A (5) includes pulley I, pulley II, bearing and connecting assembly; the connecting assembly includes bolt and nut; The two ends of the outer ring of the bearing are respectively fitted into the inner holes of pulley I and pulley II; a cable (8) is wound around the middle position of the outer ring of the bearing, and one end of the cable (8) is connected to the vertical upward pulling device (7), and the other end is wound around the outer ring of the bearing of pulley group B (6); The bolt passes through guide rail I, bearing inner ring and track II in sequence, and fastens pulley A (5) to guide rail (4) by nut.

6. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 5, characterized in that: The dimensions of the guide rail (4) are adapted to the dimensions of the bolt.

7. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 4, characterized in that: The base plate has screw holes, and bolts pass through the screw holes to fix the multi-angle loading reaction frame (3) on the optical platform.

8. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 1, characterized in that: The cable (8) is a fishing line.

9. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 1, characterized in that: The vertical upward pulling device (7) is an actuator.

10. The arbitrary angle pull-out loading device for a transparent soil pile foundation model test according to claim 1, characterized in that: The model slot (1) is a transparent acrylic model slot.

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