CN220747032U - Pile foundation pile soil interaction testing device - Google Patents
Pile foundation pile soil interaction testing device Download PDFInfo
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- CN220747032U CN220747032U CN202322322964.5U CN202322322964U CN220747032U CN 220747032 U CN220747032 U CN 220747032U CN 202322322964 U CN202322322964 U CN 202322322964U CN 220747032 U CN220747032 U CN 220747032U
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- 239000002689 soil Substances 0.000 title claims abstract description 68
- 230000003993 interaction Effects 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000009792 diffusion process Methods 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 4
- 230000001066 destructive effect Effects 0.000 claims description 3
- 230000030279 gene silencing Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
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- 125000004122 cyclic group Chemical group 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to a pile foundation pile soil interaction testing device, which comprises: a portal frame; the ring shear box is arranged on a placement platform below the portal frame, a soil sample body is filled in the ring shear box, a pressure plate is arranged at the top of the ring shear box, and a tubular pile sample inserted into the soil sample body is arranged below the pressure plate; the annular loading module is arranged on a transverse frame of the portal frame, and the output end of the annular loading module is connected with the pressure plate; the vertical loading module is arranged at the output end of the annular loading module, and the annular loading module is connected with the pressure plate through the vertical loading module; the portal frame is arranged on the vibration module; the eccentric transmission module is connected to the transverse frame of the portal frame; the sensor module is arranged in the ring shear box and is used for acquiring state information of the soil sample body; and the controller is used for receiving the information acquired by the sensor module and controlling the operation of the circumferential loading module, the vertical loading module, the vibration module and the eccentric transmission module.
Description
Technical Field
The utility model relates to a testing device for pile foundation pile soil interaction. The method is suitable for the technical field of geotechnical test instruments for offshore wind power engineering.
Background
The offshore wind power equipment is installed on the sea level through a wind power foundation, and the wind power foundation is inserted into the seabed. In the service process of offshore wind power equipment, the offshore wind turbine foundation is subjected to various complex environmental loads such as wind load, wave load, ice load, ocean current load and the like, and the load is changeable and irregularly circulated. The interaction between pile foundation and pile soil is a key for determining the service performance of a wind power foundation, and the research on the bearing performance of the wind power foundation under complex sea conditions is an important link in offshore wind power design. Therefore, the research of the pile-soil interaction mechanism under static load and the cyclic load effect has important significance on the research of the pile-soil interaction weakening mechanism on the bearing performance of the ultra-large fan foundation.
Disclosure of Invention
The utility model aims to solve the technical problems that: in order to solve the technical problems, the utility model provides a testing device for pile foundation pile soil interaction.
The technical scheme adopted by the utility model is as follows: a pile foundation pile soil interaction testing arrangement, its characterized in that: the device comprises:
a portal frame;
the ring shear box is arranged on a placement platform below the portal frame, a soil sample body is filled in the ring shear box, a pressure plate is arranged at the top of the ring shear box, and a tubular pile sample inserted into the soil sample body is arranged below the pressure plate;
the annular loading module is arranged on a transverse frame of the portal frame, the output end of the annular loading module is connected with the pressure plate, and the annular loading module is used for providing annular load for the soil sample;
the vertical loading module is arranged at the output end of the annular loading module, the annular loading module is connected with the pressure plate through the vertical loading module, and the vertical loading module is used for providing vertical load for the soil sample;
the portal frame is installed on the vibration module, and the vibration module is used for vibrating components installed on the vibration module;
the eccentric transmission module is connected to the transverse frame of the portal frame and used for adjusting the angle of the transverse frame;
the sensor module is arranged in the ring shear box and is used for acquiring state information of the soil sample body;
the controller is connected with the circumferential loading module, the vertical loading module, the vibration module, the eccentric transmission module and the sensor module, and is used for receiving information acquired by the sensor module and controlling the operation of the circumferential loading module, the vertical loading module, the vibration module and the eccentric transmission module. Thus, after filling the soil sample into the ring shear box, the tubular pile sample is inserted into the soil sample, and the vertical loading module provides vertical load for the soil sample body, so that the submarine pressure state can be simulated; the circumferential loading module provides circumferential load for the soil sample body and can simulate the state of water flow power in the ocean; the vibration module can vibrate the ring shear box and simulate the state of the sea bottom when earthquake occurs; the eccentric transmission module can adjust the angle of the transverse frame so as to adjust the angle of the tubular pile sample inserted into the soil sample body, and simulate the state of the wind power foundation inserted into the sea bottom at different angles; the sensor module can acquire the state information of the soil sample body in the running process of the testing device and send the state information into the controller. Thereby being capable of effectively testing the interaction between the soil sample body and the tubular pile sample.
The annular loading module is provided with a first driving motor arranged on the transverse frame, and the output end of the first driving motor is connected with a disc through a first transmission assembly. Therefore, the first driving motor drives the disc to rotate in the running process.
The vertical load module is provided with a telescopic rod arranged below the disc, and the pressure plate is arranged on the telescopic end of the telescopic rod. Therefore, the pressure plate can be driven to move in the vertical direction through the extension of the extension rod.
The vibration module is provided with a base and a vibration top plate arranged on the base, the portal frame is arranged on the vibration top plate, a second driving motor is arranged in the base, a second transmission assembly is arranged at the output end of the second driving motor, a vibration diffusion plate is arranged on the second transmission assembly, and the vibration diffusion plate is connected with the vibration top plate through a vibration spring. Thus, the vibration of the vibration top plate can be realized and the equipment on the vibration top plate can be driven to vibrate by controlling the operation of the second driving motor.
And silencing cotton is arranged at the position where the second driving motor is arranged in the base.
The eccentric transmission module is a telescopic cylinder, the telescopic cylinder is arranged on the sliding block, the sliding block is slidably arranged on the placing platform, the telescopic end of the telescopic cylinder is hinged with the transverse frame, the portal frame consists of the telescopic cylinder, the transverse frame and the vertical rod, one end of the vertical rod is fixedly connected with the placing platform, and the other end of the vertical rod is hinged with the transverse rod. Therefore, the angle of the adjusting transverse frame can be controlled by controlling the expansion of the expansion cylinder.
The sensor module has a humidity sensor, a pore pressure sensor, and a pressure sensor. Thus, the state change of the soil sample body in the test process can be monitored.
The ring shear box is made of transparent materials, a camera is mounted on the portal frame and used for acquiring a destructive image of the soil sample body, and the camera is connected with the controller. Therefore, the camera can acquire the damage morphological image of the soil body in the test process.
The bottom of the ring shear box is provided with a drain valve. Therefore, the method can be used for controlling the water content of the soil sample body so as to be convenient for simulating the interaction between pile foundation piles and soil under different water contents.
The beneficial effects of the utility model are as follows: according to the utility model, the pile-soil interaction under different conditions is studied by carrying out a ring shear test on the annular soil sample body by utilizing the precast tubular pile sample. According to the utility model, the humidity of a soil sample and drainage conditions (drainage and non-drainage) are controlled through the drainage valve, and test conditions such as unidirectional cyclic loading and bidirectional cyclic loading are realized through the circumferential loading module; according to the utility model, vibration load can be applied through the vibration module, and the influence of the vibration load on pile-soil interaction is observed; the utility model can simulate the possible eccentricity of the circular steel pipe pile through the eccentric transmission module, and more truly analyze the pile-soil interaction; the state information acquired by the sensor module is sent to the controller, so that the subsequent analysis of the state information is facilitated.
Drawings
Fig. 1: the structure of the utility model is schematically shown.
Fig. 2: the utility model discloses a structural schematic diagram of a cyclic loading module.
Fig. 3: the top view of the middle ring shear box in the utility model.
Fig. 4: the structure of the vibration module is schematically shown in the utility model.
In the figure: 1. a portal frame; 1-1, a transverse frame; 1-2, a vertical rod; 2. a ring shear box; 2-1, pressing plate; 2-2, soil sample body; 2-3, a tubular pile sample; 2-4, a drain valve; 2-5, inner wall; 2-6, scale; 2-7, outer wall; 3. a circumferential loading module; 3-1, a first driving motor; 3-2, a first transmission assembly; 3-3, a disc; 3-4, a first bevel gear; 3-5, a second bevel gear; 3-6, a circumferential loading rod; 4. a vertical loading module; 4-1, a telescopic rod; 5. a vibration module; 5-1, a second driving motor; 5-2, a second transmission assembly; 5-3, vibration diffusion plate; 5-4, vibrating springs; 5-5, vibrating the top plate; 5-6, silencing cotton; 5-7, a base; 6. an eccentric transmission module; 6-1, a telescopic cylinder; 6-2, sliding blocks; 7. a sensor module; 8. a controller; 9. a camera is provided.
Detailed Description
The present utility model will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present utility model and not limited to the following examples.
The embodiment is a pile foundation pile soil interaction testing device which is used for simulating the interaction between a wind power foundation and the seabed after the wind power foundation is installed on the seabed.
In the embodiment, the ring shear box is provided with a placement platform, a portal frame 1 and a ring shear box 2 are installed on the placement platform, and the portal frame 1 is arranged at a position above the ring shear box 2.
In this embodiment, the ring shear box 2 has an inner wall 2-5 and an outer wall 2-7 arranged concentrically, and the soil sample body 2-2 is filled between the inner wall 2-5 and the outer wall 2-7. The bottom of the ring shear box 2 is provided with a drain valve 2-4, and the water content of the soil sample body 2-2 in the ring shear box 2 can be realized by controlling the opening and closing of the drain valve 2-4. The outer wall 2-7 of the ring shear box 2 is provided with scales 2-6, so that the displacement of the tubular pile sample 2-3 in the soil sample body 2-2 can be conveniently checked.
In this embodiment, the portal frame 1 is provided with the hoop load module 3. The circumferential loading module 3 is provided with a first driving motor 3-1 arranged on the portal frame 1, a first transmission assembly 3-2 is arranged at the output shaft of the first driving motor 3-1, and a disc 3-3 is arranged on the first transmission assembly 3-2. Wherein a first bevel gear 3-4 is arranged on an output shaft of a first driving motor 3-1, a circumferential loading rod 3-6 is rotatably arranged on the portal frame 1 along the vertical direction, a second bevel gear 3-5 meshed with the first bevel gear 3-4 is arranged on the circumferential loading rod 3-6, and a disc 3-3 is arranged on the circumferential loading rod 3-6. In this way, the annular loading rod 3-6 can be placed in a vertical state under the action of the first transmission assembly 3-2.
In this embodiment, a vertical loading module 4 is installed at the lower end of the disc 3-3. The vertical loading module 4 is a telescopic rod 4-1, the telescopic rod 4-1 is uniformly arranged at the lower end of the disc 3-3, a pressure plate 2-1 is arranged at the telescopic end of the telescopic rod 4-1, and the shape of the pressure plate 2-1 is matched with that of the soil sample body 2-2. The lower end of the pressing plate 2-1 is provided with a tubular pile sample 2-3, and the tubular pile sample 2-3 is inserted into the soil sample body 2-2. Thus, the pressure plate 2-1 can be pressed against the soil sample body 2-2 through the vertical loading module 4 and the pressure can be regulated, so that the ground pressure applied to the seabed at different depths can be simulated; the circular loading module 3 can drive the pressing disc 2-1 and the tubular pile sample 2-3 to move in a circular way, so that the condition under the action of ocean current is simulated.
In this embodiment, a vibration module 5 is provided below the placement platform. The vibration module 5 is provided with a base 5-7, a second driving motor 5-1 is arranged in the base 5-7, noise reduction cotton 5-6 capable of relieving the vibration of the second driving motor 5-1 and reducing the noise when the second driving motor 5-1 vibrates is arranged at the position of the second driving motor 5-1 in the base 5-7, a second transmission assembly 5-2 is arranged at the output end of the second driving motor 5-1, a vibration diffusion plate 5-3 which is horizontally arranged is arranged on the second transmission assembly 5-2, a plurality of vibration springs 5-4 which are vertically arranged are uniformly arranged on the vibration diffusion plate 5-3, the vibration springs 5-4 extend out of the base 5-7, a vibration top plate 5-5 is arranged at the end part of the vibration springs 5-4 which extend out of the base 5-7, and the placement platform is arranged on the vibration top plate 5-5. Thus, the second driving motor 5-1 can drive the vibrating top plate 5-5 and equipment arranged on the vibrating top plate 5-5 to vibrate so as to simulate the state of the submarine earthquake. The vibration of the vibration top plate 5-5 is more uniform and stable under the action of the vibration diffusion plate 5-3 and the vibration springs 5-4.
In this embodiment, the output shaft of the second driving motor 5-1 is arranged along the horizontal direction, the second transmission assembly 5-2 is a cam mounted on the output shaft of the second driving motor 5-1, and the vibration diffusion plate 5-3 is connected with the cam through a hinge.
In this embodiment, the portal frame 1 is composed of a telescopic cylinder 6-1, a transverse frame 1-1 and a vertical rod 1-2, wherein a first end of the vertical rod 1-2 is fixedly mounted on a placement platform, a second end of the vertical rod 1-2 is hinged with a second end of the transverse frame 1-1 through a hinge, the telescopic cylinder 6-1 is fixedly mounted on a sliding block 6-2, the sliding block 6-2 is slidably mounted on the placement platform, and a telescopic end of the telescopic platform is connected with the first end of the transverse frame 1-1 through the hinge. Therefore, the angle of the transverse frame 1-1 can be adjusted by controlling the telescopic cylinder 6-1 to stretch, so that the angle of the pipe pile sample 2-3 inserted into the soil sample body 2-2 is adjusted, and the state that the wind power foundation is inclined on the sea floor is simulated.
In this embodiment, a sensor module 7 is disposed in the ring shear box 2, and the sensor module 7 has a humidity sensor, a pore pressure sensor and a pressure sensor, so that status information of the soil sample body 2-2 can be obtained.
In this embodiment, the ring shear box 2 is made of transparent material, and a camera 9 for capturing a destructive image of the soil sample body 2-2 is mounted on the gantry 1.
In this embodiment, the circumferential loading module 3, the vertical loading module 4, the vibration module 5, the eccentric transmission module 6, the camera 9 and the sensor module 7 are all connected with the controller 8, and the controller 8 can receive the information obtained by the sensor module 7 and the camera 9 and control the operation of the circumferential loading module 3, the vertical loading module 4, the vibration module 5 and the eccentric transmission module 6. Thus, the controller 8 can control the annular loading module 3, the vertical loading module 4, the vibration module 5 and the eccentric transmission module 6 to operate so as to simulate the state of the pile foundation when the pile foundation is installed on the sea floor, and acquire information of the action between the soil sample body 2-2 and the pipe pile sample 2-3 through the sensor module 7.
Pile-soil interface interactions can be categorized into normal and tangential interactions, and are often characterized by stress-strain relationship curves. In general, the pile-soil interface normal interaction mechanism is relatively simple, and the normal stress and the normal strain are in a linear relationship:
σ n ＝k n ·u n
wherein sigma n Is normal stress, k n For normal strain, u n Is normal stiffness.
In general, the tangential interaction mechanism of the pile-soil interface is relatively complex, and tangential stress and tangential strain should satisfy the following relationship:
τ＝k s ·u s ≤τ max
where τ is tangential stress, u s For tangential strain, k s In order to achieve a tangential stiffness,c is the pile-soil interface friction angle, c is the pile-soil interface cohesion, c r F is the residual cohesive force of the pile soil interface t Is the normal tensile strength.
Further, a series of pile-soil interface interaction related parameters can be determined through fitting of experimental data.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (9)
1. A pile foundation pile soil interaction testing arrangement, its characterized in that: the device comprises:
a portal frame (1);
the ring shear box (2), the ring shear box (2) is arranged on a placement platform below the portal frame (1), the ring shear box (2) is filled with a soil sample body (2-2), the top of the ring shear box (2) is provided with a pressure plate (2-1), and a tubular pile sample (2-3) inserted into the soil sample body (2-2) is arranged below the pressure plate (2-1);
the annular loading module (3) is arranged on a transverse frame (1-1) of the portal frame (1), the output end of the annular loading module (3) is connected with the pressure plate (2-1), and the annular loading module (3) is used for providing annular load for the soil sample;
the vertical loading module (4) is arranged at the output end of the annular loading module (3), the annular loading module (3) is connected with the pressure plate (2-1) through the vertical loading module (4), and the vertical loading module (4) is used for providing vertical load for the soil sample;
a vibration module (5), wherein the portal frame (1) is installed on the vibration module (5), and the vibration module (5) is used for vibrating components installed on the vibration module (5);
the eccentric transmission module (6) is connected to the transverse frame (1-1) of the portal frame (1) and is used for adjusting the angle of the transverse frame (1-1);
the sensor module (7) is arranged in the ring shear box (2) and is used for acquiring state information of the soil sample body (2-2);
the device comprises a controller (8), a circumferential loading module (3), a vertical loading module (4), a vibration module (5), an eccentric transmission module (6) and a sensor module (7), wherein the controller (8) is connected with the controller (8), and the controller (8) is used for receiving information acquired by the sensor module (7) and controlling the operation of the circumferential loading module (3), the vertical loading module (4), the vibration module (5) and the eccentric transmission module (6).
2. A pile foundation soil interaction testing device according to claim 1, wherein: the annular loading module (3) is provided with a first driving motor (3-1) arranged on the transverse frame (1-1), and the output end of the first driving motor (3-1) is connected with a disc (3-3) through a first transmission assembly (3-2).
3. A pile foundation soil interaction testing device according to claim 2, wherein: the vertical load module is provided with a telescopic rod (4-1) arranged below the disc (3-3), and the pressure plate (2-1) is arranged on the telescopic end of the telescopic rod (4-1).
4. A pile foundation soil interaction testing device according to claim 1, wherein: the vibration module (5) is provided with a base (5-7) and a vibration top plate (5-5) arranged on the base (5-7), the portal frame (1) is arranged on the vibration top plate (5-5), a second driving motor (5-1) is arranged in the base (5-7), a second transmission assembly (5-2) is arranged at the output end of the second driving motor (5-1), a vibration diffusion plate (5-3) is arranged on the second transmission assembly (5-2), and the vibration diffusion plate (5-3) is connected with the vibration top plate (5-5) through a vibration spring (5-4).
5. The pile foundation soil interaction testing device of claim 4, wherein: the base (5-7) is internally provided with silencing cotton (5-6) at the position where the second driving motor (5-1) is arranged.
6. A pile foundation soil interaction testing device according to claim 1, wherein: the eccentric transmission module (6) is a telescopic cylinder (6-1), the telescopic cylinder (6-1) is arranged on the sliding block (6-2), the sliding block (6-2) is slidably arranged on the placement platform, the telescopic end of the telescopic cylinder (6-1) is hinged with the transverse frame (1-1), the portal frame (1) is composed of the telescopic cylinder (6-1), the transverse frame (1-1) and the vertical rod (1-2), one end of the vertical rod (1-2) is fixedly connected with the placement platform, and the other end of the vertical rod (1-2) is hinged with the transverse rod.
7. A pile foundation soil interaction testing device according to claim 1, wherein: the sensor module (7) has a humidity sensor, a pore pressure sensor and a pressure sensor.
8. A pile foundation soil interaction testing device according to claim 1, wherein: the ring shear box (2) is made of transparent materials, the camera (9) is installed on the portal frame (1), the camera (9) is used for obtaining a destructive image of the soil sample body (2-2), and the camera (9) is connected with the controller (8).
9. A pile foundation soil interaction testing device according to claim 1, wherein: the bottom of the ring shear box (2) is provided with a drain valve (2-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322322964.5U CN220747032U (en) | 2023-08-29 | 2023-08-29 | Pile foundation pile soil interaction testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322322964.5U CN220747032U (en) | 2023-08-29 | 2023-08-29 | Pile foundation pile soil interaction testing device |
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| CN220747032U true CN220747032U (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322322964.5U Active CN220747032U (en) | 2023-08-29 | 2023-08-29 | Pile foundation pile soil interaction testing device |
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2023
- 2023-08-29 CN CN202322322964.5U patent/CN220747032U/en active Active
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