Model pile seepage loading device
By designing a model pile seepage loading device that combines a seepage system and a lever loading system, the problems of high cost and poor operability in existing pile foundation seepage simulation technologies have been solved, achieving low-cost and flexible seepage environment simulation and pile foundation mechanical performance measurement.
Patent Information
- Application Number
- CN202423165549.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-22
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-22
AI Technical Summary
Existing technologies are insufficient to simulate the bearing capacity and stability changes of pile foundations under seepage conditions at low cost. In-situ field tests are costly and not repeatable, while laboratory scale-down model tests suffer from poor operability.
Design a model pile seepage loading device that includes a seepage system and a lever loading system. Through a high-level water supply tank, a model box, a low-level water outlet tank, an earth pressure sensor, strain gauges, and a lever loading system, the seepage environment is simulated and the mechanical properties of the pile foundation are measured.
It enables low-cost, flexible, and adjustable seepage environment simulation, simplifies operation, and can effectively guide risk prediction and solution improvement in actual engineering projects.
Smart Images
Figure CN223727551U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a model pile seepage loading device. BACKGROUND
[0002] Seepage refers to the flow of fluid in porous media, and the material composed of granular or block materials and containing many pores or cracks is called porous media. Generally, the seepage in the soil or rock layer below the ground surface is called groundwater movement, which is the most common seepage phenomenon in nature. Groundwater seepage erosion can cause ground deformation and stress redistribution, disturb the ground around the pile foundation, change the stress state of the pile foundation, and reduce the bearing capacity of the pile foundation. Therefore, the mechanical properties of the pile foundation under the seepage state are very meaningful for practical engineering.
[0003] The research on the mechanical properties of the pile body is divided into in-situ test and laboratory scale test. The in-situ test has a pile size and a load closer to the actual situation, but the cost is huge, and it is not repeatable, the construction is complex, the test period is long, and it is not reproducible. In comparison, the laboratory scale model test has strong practicality because of its low cost, simple construction difficulty, short period and reproducibility, and is an important tool for solving engineering problems and researching engineering theory. CONTENT OF THE UTILITY MODEL
[0004] The technical problem to be solved by the utility model is how to design a model test at low cost to simulate the change of the bearing capacity and stability of the pile foundation under the seepage state under the action of the upper load. Therefore, a model pile seepage loading device is provided.
[0005] The technical scheme of the utility model is specifically:
[0006] A model pile seepage loading device, comprising a seepage system device and a lever loading system device.
[0007] The seepage system device comprises a high-level water replenishing tank, a model tank and a low-level water outlet tank. The high-level water replenishing tank is connected to the model tank through a water inlet pipe, and the model tank is connected to the water outlet tank through a water outlet pipe. The model tank is provided with a hole in the upper portion, and a model pile is arranged in the tank, and the tank is filled with soil, and the model pile is inserted into the soil.
[0008] The lever loading system device comprises a vertical stand, the vertical stand is hingedly connected to a horizontal frame, and a loading frame is hung below the end portion of the horizontal frame. A loading platform is connected to the middle portion of the horizontal frame through a rotating shaft, and the loading platform is pressed on the pile top of the model pile.
[0009] A water stop valve is arranged on the water inlet pipe and the water outlet pipe.
[0010] The model tank is provided with three holes on each side, and the model tank is connected to three water inlet pipes and three water outlet pipes.
[0011] At least one earth pressure sensor is arranged in the soil, a strain gauge is arranged on the outer wall of the model pile, and a displacement meter is arranged on the surface of the soil and the model pile.
[0012] The horizontal frame and the vertical frame are connected through a roller shaft, a hook is arranged on the right side of the horizontal frame, and the hook is connected with the loading frame through a lifting rope.
[0013] The model test device has the advantages of low cost, simple operation, flexible adjustment space, effective simulation of complex seepage environment in actual engineering, and good guiding significance for early pre-engineering risk and perfect solution. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a structural diagram of the seepage system device;
[0016] Figure 3 It is a structural diagram of the lever loading system device. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0018] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0019] As shown in Figure 1 A model pile seepage loading device, comprising a seepage system device 1 and a lever loading system device 2.
[0020] As shown in Figure 1 , Figure 2As shown, the seepage system device 1 includes a high water tank 11, a model tank 12 and a low water tank 13, wherein the high water tank 11 is connected to the model tank 12 through a water inlet pipe 14, and the model tank 12 is connected to the water tank 13 through a water outlet pipe 15; a water stop valve 16 is arranged on the water inlet pipe 14 and the water outlet pipe 15.
[0021] The model tank 12 is provided with a model pile 17, and the tank is filled with soil 18, and the model pile 17 is inserted into the soil 18; at least one soil pressure sensor 181 is arranged in the soil 18, a strain gauge 19 is arranged on the outer wall of the model pile 17, and a displacement meter 182 is arranged on the surface of the soil 18 and the model pile 17. The displacement meter 182, the soil pressure sensor 181 and the strain gauge 19 are all devices for monitoring the mechanical properties of the pile and the soil.
[0022] Water flows out of the high water tank 11, flows into the model tank 12 through the water inlet pipe 14, forms seepage in the soil of the filled model pile 12, and then flows out through the water outlet pipe 15 and flows into the low water tank 13. The height of the high water tank 11 and the closing degree of the water stop valve 16 are adjusted to control the intensity of the seepage.
[0023] Further, the model tank 12 in the drawing is provided with three openings on each side, which are respectively connected to three water inlet pipes 14 and three water outlet pipes 15. In actual process, the opening position and the number of openings can be selected according to needs, so as to adjust the degree of seepage.
[0024] As shown, Figure 3 The lever loading system device 2 includes a vertical frame 21, the vertical frame 21 is hinged to a horizontal frame 22, and a loading frame 23 is hung below the end of the horizontal frame 22.
[0025] The horizontal frame 22 and the vertical frame 21 are connected through a roller shaft 24, and the horizontal frame 22 can rotate around the roller shaft 24. A hook 27 is arranged on the right side of the horizontal frame 22, and the hook 27 is connected to the loading frame 23 through a lifting rope. A loading platform 26 is connected to the middle of the horizontal frame 22 through a rotating shaft 25, and the loading platform 26 is pressed on the top of the model pile 17. When a weight of 1 unit is loaded in the loading frame 23, the top of the pile will generate a force of D / d units, wherein d is the distance from the center of the roller shaft 24 to the center of the rotating shaft 25, and D is the distance from the center of the roller shaft 24 to the hook 27. d and D can be adjusted according to needs.
[0026] Further, the lever loading system device 2 is a force structure, and the material selection should be made according to actual needs. The key parts also need to be reinforced. In the drawing, the vertical frame 21 includes two channel steels arranged oppositely, and the middle part is welded into a whole through a short channel steel. The bottom part is fixed on the bottom steel plate. The horizontal frame 22 adopts an I-beam, and the key connecting parts are reinforced with steel pipes. The lever loading makes the pile body bear force uniformly and stably, and the loading process is simple, flexible and good in adjustment.
[0027] The above merely describes preferred embodiments of the present application, and it should be noted that, without departing from the overall concept of the present application, those skilled in the art can make several changes and improvements, which should also be considered as falling within the protection scope of the present application.
Claims
1. A model pile seepage loading device, characterized in that: It comprises a seepage system device (1) and a lever loading system device (2); The seepage system device (1) comprises a high-position water supplement tank (11), a model tank (12) and a low-position water outlet tank (13), wherein the high-position water supplement tank (11) is connected with the model tank (12) through a water inlet pipe (14), the model tank (12) is connected with the water outlet tank (13) through a water outlet pipe (15); the model tank (12) is provided with a hole in the upper portion, a model pile (17) is arranged in the tank, and the tank is filled with soil (18), and the model pile (17) is inserted into the soil (18); The lever loading system device (2) comprises a vertical support (21), the vertical support (21) is hinged with a horizontal support (22), and a loading frame (23) is hung below the end portion of the horizontal support (22); a loading platform (26) is connected with the middle portion of the horizontal support (22) through a rotating shaft (25), and the loading platform (26) is pressed on the top of the model pile (17).
2. The model pile seepage loading device according to claim 1, characterized in that: The water inlet pipe (14) and the water outlet pipe (15) are both provided with a water stop valve (16).
3. The model pile seepage loading device according to claim 2, characterized in that: The model tank (12) is provided with three holes on each side, and the model tank (12) is communicated with three water inlet pipes (14) and three water outlet pipes (15) respectively.
4. The model pile seepage loading device according to claim 1, characterized in that: At least one soil pressure sensor (181) is arranged in the soil (18), a strain gauge (19) is arranged on the outer wall of the model pile (17), and a displacement meter (182) is arranged on the surface of the soil (18) and the model pile (17).
5. The model pile seepage loading device according to claim 1, characterized in that: The horizontal support (22) and the vertical support (21) are connected through a roller shaft (24), a hook (27) is arranged on the right side of the horizontal support (22), and the hook (27) is connected with the loading frame (23) through a lifting rope.