JP2021110221A - Device and method for simulating dynamic load on pile top - Google Patents

Abstract

To provide a device and a method for simulating dynamic load on a pile top.SOLUTION: A device for simulating dynamic load comprises: a housing case 1, a disc-type loading mechanism 2, a gear-set force transmission mechanism 10, and an external support mechanism. The disc-type loading mechanism 2 and the gear-set force transmission mechanism 10 are arranged in the housing case 1. The housing case 1 is placed on a top of a pile body 6. The disc-type loading mechanism 2 can achieve load change by means of its internal mass block. Magnetic poles can be changed by means of an electromagnet, to produce attractive and repulsive forces between permanent magnets, and thus an upper semicircle loading process, by means of changing a radius, eliminates a pile-pullout force. At the same time, a lower semicircle loading process provides a downward loading force by means of changing a radius, therefore the device does not produce a pull-up force during the loading process of a pile top, and there is only a vertical downward loading force. By means of changing the size of the mass block, a motor frequency is varied, and states of the pile body 6 under actual load is simulated according to various loading forces and various loading frequencies.SELECTED DRAWING: Figure 1

Description

The present invention relates to a dynamic loading simulation of a pile body, and more particularly to a dynamic loading simulation device for a pile head and a method thereof.

Highway technology is developing rapidly, and its application range has already extended to the coastal areas or coastal areas, but the soil layer that is often found in the foundation of road ground is muddy soil, and simply replacing it with embankment is enough to replace the ground. Since it is difficult to guarantee the load bearing capacity, pile foundations must be installed in those areas in order to meet the load bearing capacity requirements for normal use. On the other hand, the load bearing capacity of the pile body directly affects the load bearing capacity of the entire ground foundation. Therefore, it is necessary to measure and analyze the dynamic characteristics of a single pile under the design load, and finally predict and analyze the life condition of the pile body.

In the conventional vertical loading device of the pile head, an upward pulling force is likely to be generated at the time of carrying out the loading, which causes a tensile stress action on the pile body, and it is more likely that a large damage is caused in the compressed pile. In addition, the conventional vertical loading device with a pile head is bulky and heavy as a whole, and is not economical.

Considering the current status of indoor model tests and field tests, it is convenient to disassemble, assemble and move, and it is necessary to urgently develop a test device that applies a load in a variable frequency variable stage.

The present invention overcomes the above-mentioned drawbacks existing in the prior art, converts the motor frequency by changing the size of the mass block, simulates various loading forces and various loading frequencies, and under actual load. It is an object of the present invention to provide a dynamic loading simulation device for a pile head and a method thereof for simulating the state of a pile body in the above.

The technical proposal of the present invention is as follows. It is a dynamic loading simulation device for pile heads, including a housing case, a disk type loading mechanism, a gear group power transmission mechanism and an external support mechanism, and the disk type loading mechanism and the gear group power transmission mechanism are housing cases. Installed inside, the housing case is placed on top of the pile.

The gear group power transmission mechanism includes a power transmission gear I, a power transmission gear II, and a main gear. The main gear is connected to a housing case via a triangular support frame for the main gear, and a motor connection shaft is at the center of the main gear. Is fixed, the motor connection shaft is connected to the output shaft of the variable frequency motor, the main gear meshes with the power transmission gear I to transmit power, and the power transmission gear I meshes with the power transmission gear II to transmit power. The power transmission gear I and the power transmission gear II rotate in opposite directions, and the power transmission spindle is fixed at the center of both the power transmission gear I and the power transmission gear II, and at the end of the power transmission spindle. Each is provided with a disk-type loading mechanism, and the disk-type loading mechanisms located on the same side rotate in opposite directions.

The disk-type loading mechanism includes a mass block slide shaft, a disk case, a power transmission spindle node, a large mass block and a small mass block, the mass block slide shaft is installed in the disk case, and both ends of the mass block slide shaft are gaskets. It is fixedly joined to the inner wall of the disk case via, and the power transmission spindle node is fixed to the center of the mass block slide shaft, and the power transmission spindle node is fixedly joined to the end of the power transmission spindle. The mass block and the small mass block are installed on both sides of the power transmission spindle node, the large mass block and the small mass block are slidably covered on the mass block slide shaft, and the outer surface of the mass block slide shaft is covered with an electromagnet coil. The inner ring of the large mass block and the small mass block is a permanent magnet, and the mass block slide shaft forms a repulsive force between the large mass block and the small mass block, and between the large mass block and the gasket, Damper springs are provided between the small mass block and the gasket, respectively, and an electromagnet and a damper block are provided between the large mass block and the power transmission spindle node, and between the small mass block and the power transmission spindle node, respectively. Provided, the electromagnet is oriented in the direction of the mass block, the electromagnet and damper block are fixed and covered on the mass block slide shaft, the electromagnet and damper block are fixedly joined, on both sides of the power transmission spindle node. The electromagnet and the damper block are installed symmetrically.

In the present invention, both the power transmission gear I and the power transmission gear II are connected to the housing case via the triangular support frame for the power transmission gear, and the triangular support frame for the power transmission gear is the triangular frame body II and the centering bearing. Including II, one end of the triangular frame body II is fixedly joined to the vertical side wall of the housing case via the welded base plate I, and the other end of the triangular frame body II is horizontal to the housing case via the welded base plate IV. It is fixedly welded to the bottom, and a centering bearing II is provided at the corner of the triangular frame body II. Is provided.

The main gear is connected to the housing case via a triangular support frame for the main gear, the triangular support frame for the main gear includes a triangular frame body I and a centering bearing I, and one end of the triangular frame body I is a welded base plate II. It is fixedly joined to the vertical side wall of the housing case 1 via, and the other end of the triangular frame body I is fixedly joined to the horizontal bottom portion of the housing case via the welding base plate III, and is fixedly joined to the corner portion of the triangular frame body I. A centering bearing I is provided, the centering bearing I is fixedly joined to the triangular frame body I, and a motor connecting shaft is provided at the center of the centering bearing I.

Two power transmission gears I and two power transmission gears II are installed, and the main gear meshes with the two power transmission gears I at the same time to transmit power, and the two power transmission gears I each mesh with the two power transmission gears II. Power is transmitted, the two power transmission gears I are fixed to the same power transmission spindle, and the two power transmission gears II are fixed to the same power transmission spindle.

Further, an external support mechanism is included, the external support mechanism includes a square support frame and a ball hinge support rod, square support frames are installed on the outside of each of the four surfaces of the housing case, and the bottom of the square support frame is a square support frame stabilizing plate. The top of the square support frame is connected to one end of the ball hinge support rod via a ball hinge, and the other end of the ball hinge support rod is hinged to the housing case.

The square support frame and ball hinge support rod have a telescopic structure, the ball hinge support rod includes an outer tube and an inner tube, the inner tube is installed in the outer tube, the inner tube slides in the outer tube, and the outer tube and Each of the inner pipes is provided with a bolt hole, and a bolt is inserted into the bolt hole to fix and join the outer pipe and the inner pipe. The structure of the square support frame is the same as that of the ball hinge support rod, and the description thereof is omitted here.

It further includes an intelligence data collection and output system that includes a main collector, sub-collector and pressure sensor, with the main collector and sub-collector installed inside the bottom of the housing case and the pressure sensor installed outside the bottom of the housing case. And is located between the housing case and the top of the pile.

Both the large mass block and the small mass block are made up of two identical semicircular mass blocks fixedly joined by a locking method.

The present invention further includes a method of realizing a loading simulation by utilizing the above-mentioned dynamic loading simulation device of a pile head, which includes the following steps.

During the loading process of the upper half circle, the electric magnet on the large mass block side attracts the large mass block, the loading radius of the large mass block is r, and the electric magnet on the small mass block side repels the small mass block and inhibits the damper spring. Below, the loading radius of the small mass block is 2r, the mass of the large mass block is M, the mass of the small mass block is m, and M = 2m, at which time two disk-type loading mechanisms located on the same side. The stress status of is as follows.

During the lower half circle loading process, when the large mass block finishes the upper half circle loading stage and reaches the central axis, the polarity of the electromagnet changes, the electromagnet on the large mass block side repels the large mass block, and the large mass block is loaded. The radius is 2r, the electromagnet on the small mass block side attracts the small mass block, and the loading radius of the small mass block is r. At this time, the stress status of the two disk-type loading mechanisms located on the same side is as follows. Is.

When the mass block finishes the lower semicircular loading stage and moves to the central axis again, the stress circulation process described above is repeated.

The present invention has the following advantageous effects.

(1) The disk-type loading mechanism can realize variable-stage loading by the mass block inside it, and can change the magnetic poles by the electromagnet to generate attractive force and repulsive force between the permanent magnets. Since the pulling force of the pile is eliminated by the method of changing the radius in the upper half circle loading process, and at the same time the downward loading force is provided by the method of changing the radius in the lower half circle loading process, the device is used in the pile head loading process. No upward pulling force is generated inside, only a downward vertical loading force is generated.

(2) In terms of disassembly and assembly, the overall weight is light, economical, and convenient for processing.

(3) By adopting the magnetic bearing principle and the centrifugal principle, it is possible to realize multi-step variable frequency loading of the pile head by a variable frequency motor and gear group, and the load simulation is close to the actual operating state.

(4) The device can collect and output data in real time, and can realize data monitoring and analysis by remote intelligence.

It is a structural schematic diagram of the front of this invention. It is a structural schematic diagram of the right side surface of this invention. It is the 3D structure schematic diagram of this invention. It is a schematic plane structure diagram of this invention. It is a structural schematic diagram of a disk type loading mechanism. It is sectional drawing of the mass block slide shaft. It is a structural schematic diagram of a gear group system. It is the schematic of the connection structure of a square support frame and a ball hinge support rod. It is a structural schematic diagram of the triangular support frame for a main gear. It is a structural schematic diagram of the triangular support frame for a power transmission gear. It is a schematic arrangement structure of a pressure sensor. It is an operation principle diagram of the upper half circle loading stage. It is an operation principle diagram of the lower half circle loading stage.

In order to clarify the above object, features and advantages of the present invention, specific examples of the present invention will be described in detail below with reference to the drawings.

In order to fully understand the present invention, the details will be described in detail in the following description. However, the present invention can be carried out by various other methods different from those described here, and those skilled in the art can make similar extensions without deviating from the intent of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

As shown in FIGS. 1 to 4, the pile head dynamic loading simulation device of the present invention includes a housing case 1, a disk-type loading mechanism 2, a gear group power transmission mechanism 10, an external support mechanism, and an intelligence data collection / output system. Including, the housing case 1 has a box shape, the disk-type loading mechanism 2 and the gear group power transmission mechanism 10 are installed in the housing case 1, and the housing case 1 is placed on the top of the pile body 6. An external support mechanism is installed outside the housing case 1, the bottom of the external support mechanism is connected to the ground, the top of the external support mechanism is connected to the housing case 1, and the external support mechanism is the housing case. The stability of the disk-type loading mechanism 2 is guaranteed by adjusting the positions of 1 and the disk-type loading mechanism 2 with a small width so that the disk-type loading mechanism 2 is in sufficient contact with the lower pile head during the loading process. , It is possible to prevent the entire device from tipping over due to the excessive impact caused by the loading.

As shown in FIG. 7, the gear group power transmission mechanism 10 includes a power transmission gear I1001, a power transmission gear II1002, and a main gear 1003, and the main gear 1003 is connected to the housing case 1 via a triangular support frame 5 for the main gear. The motor connecting shaft 501 is fixed to the center of the main gear 1003, the motor connecting shaft 501 is connected to the output shaft of the variable frequency motor via a shaft joint, and the variable frequency motor uses a digital input to control the motor rotation speed. It can be controlled, thereby controlling the loading frequency of the entire device. Since the main gear 1003 meshes with the power transmission gear I1001 to transmit power and the power transmission gear I1001 meshes with the power transmission gear II1002 to transmit power, the power transmission gear I1001 and the power transmission gear II1002 rotate in opposite directions. Both the power transmission gear I1001 and the power transmission gear II1002 are connected to the housing case 1 via the power transmission gear triangular support frame 9. A power transmission spindle 14 is fixed to both the central portion of the power transmission gear I1001 and the power transmission gear II1002, and a disk-type loading mechanism 2 is connected to the end portion of the power transmission spindle 14. In this embodiment, two power transmission gears I1001 and two power transmission gears II1002 are installed, that is, the main gear 1003 meshes with two power transmission gears I1001 at the same time to transmit power, and two power transmission gears I1001 each. Power is transmitted by meshing with the power transmission gear II1002, the two power transmission gears I1001 are fixed to the same power transmission spindle 14, the two power transmission gears II1002 are also fixed to the same power transmission spindle 14, and the two power transmission spindles. Disk-type loading mechanisms 2 are fixed to both ends of 14, respectively, and the rotation directions of the disk-type loading mechanisms 2 located on the same side are opposite. The basic circular radius of the main gear 1003 is 150 mm, the number of teeth is 36, the thickness is 300 mm, the basic circular radius of the power transmission gear I1001 and the power transmission gear II1002 is 150 mm, and the number of teeth is 36. And the thickness is 50 mm.

As shown in FIG. 9, triangular support frames 5 for main gears are installed on both sides of the main gear, and the triangular support frame 5 for main gears includes a triangular frame body I and a centering bearing I503, and is a triangular frame body. One end of I is fixedly joined to the vertical side wall of the housing case 1 via the welding base plate II4, and the other end of the triangular frame body I is fixedly joined to the horizontal bottom of the housing case 1 via the welding base plate III12. ing. A centering bearing I503 is provided at a corner of the triangular frame body I, the centering bearing I503 is fixedly joined to the triangular frame body I, and a motor connection shaft 501 is provided at the center of the centering bearing I503. .. The triangular support frame 5 for the main gear acts as a support for the main gear 1003.

As shown in FIG. 10, the triangular support frame 9 for power transmission gears includes a triangular frame body II and a centering bearing II901, and one end of the triangular frame body II is a vertical side wall of a housing case 1 via a welding base plate I3. The other end of the triangular frame body I is fixedly joined to the horizontal bottom portion of the housing case 1 via the welding base plate IV13. A centering bearing II901 is provided at a corner of the triangular frame body II, the centering bearing II901 is fixedly joined to the triangular frame body II, and a power transmission spindle 14 is provided at the center of the centering bearing II901. .. The triangular support frame 9 for the power transmission gear acts as a support for the power transmission gear I1001 and the power transmission gear II1002.

As shown in FIG. 8, the external support mechanism includes the square support frame 8 and the ball hinge support rod 11, and in this embodiment, the square support frames 8 are installed on the outside of the four surfaces of the housing case 1, respectively, and the square support frame 8 is installed. The bottom of the rod is connected to the ground via a square support frame stabilizing plate 801 and the contact area with the ground is expanded by the square support frame stabilizing plate 801. The top of the square support frame 8 is connected to one end of the ball hinge support rod 11 via the ball hinge 17, and the other end of the ball hinge support rod 11 is hinged to the housing case 1. The coupling action of the square support frame 8 and the ball hinge support rod 11 increases the positioning stability and the support rigidity of the entire device, and at the same time, it is possible to prevent the entire loading device from tipping over due to the impact action of the load. In this embodiment, the square support frame 8 and the ball hinge support rod 11 are both telescopic, the ball hinge support rod 11 includes the outer pipe 1101 and the inner pipe 1103, and the inner pipe 1103 is installed in the outer pipe 1101. The inner pipe 1103 is slidable in the outer pipe 1101, and the outer pipe 1101 and the inner pipe 1103 are both provided with bolt holes 1102. In the process of sliding the inner pipe 1103 in the outer pipe 1101, the length of the ball hinge support rod 11 is adjusted, and when the ball hinge support rod 11 reaches an appropriate length, the bolt is inserted into the bolt hole 1102. By inserting it, the length of the ball hinge support rod 11 is fixed. The telescopic structure of the square support frame 8 is the same as that of the ball hinge support rod 11, and description thereof will be omitted here. The vertical position of the dynamic loading simulation device for the pile head can be finely adjusted by the telescopic adjustment of the square support frame 8 and the ball hinge support rod 11.

The disk-type loading mechanism 2 includes a mass block slide shaft 206, a disk case 201, a power transmission spindle node 209, a large mass block 204 and a small mass block 208, and the mass block slide shaft 206 is installed in the disk case 201 and has a mass. Both ends of the block slide shaft 206 are fixedly joined to the inner wall of the disk case 201 via a gasket 207. A power transmission spindle node 209 is fixed to the central portion of the mass block slide shaft 206, and the power transmission spindle node 209 is fixedly joined to the end portion of the power transmission spindle 14, and when the power transmission spindle 14 rotates, The entire disk-type loading mechanism 2 rotates in conjunction with the power transmission spindle node 209. The large mass block 204 and the small mass block 208 are installed on both sides of the power transmission spindle node 209, and both of the same semicircular mass blocks are fixedly joined by a locking method and slidable on the mass block slide shaft 206. The outer surface of the mass block slide shaft 206 is covered with an electromagnet coil 210, and a uniform magnetic field is generated over the entire mass block slide shaft 206. The inner ring of the large mass block 204 and the small mass block 208 is a permanent magnet, the outer tube is alloy iron, and the mass block slide shaft 206 forms a repulsive force between the large mass block and the small mass block, and is a magnetic bearing. In the process of sliding the large mass block and the small mass block along the mass block slide axis, the temperature of the mass block slide axis does not become excessively high due to friction and fatigue failure does not occur. I'm preventing it. A damper spring 205 is provided between the large mass block 204 and the gasket 207, and between the small mass block 208 and the gasket 207. An electromagnet 202 and a damper block 203 are provided between the small mass block 208 and the power transmission spindle node 209, the electromagnet 202 is directed in the direction of the small mass block 208, and the electromagnet 202 and the damper block 203 are mass. It is fixedly covered on the block slide shaft 206, and the electromagnet 202 and the damper block 203 are fixedly joined by an adhesive method. The electromagnets 202 and the damper block 203 on both sides of the power transmission spindle node 209 are installed symmetrically. Four disk-type loading mechanisms are installed in the device to meet the needs of loading force, and the generation of horizontal force is offset by installing a pair of disk-type loading mechanisms located on the same side. .. The radius of the large and small mass blocks changes due to the attraction and repulsion of the electromagnet, which changes the magnitude of the loading force in the vertical direction.

The intelligence data collection and output system includes a main collector 15, a sub-collector 16 and a pressure sensor 18, the main collector 15 and the sub-collector 16 being installed inside the bottom of the housing case 1, as shown in FIG. The pressure sensor 18 is installed on the outside of the bottom of the housing case 1 and is located between the housing case 1 and the top of the pile body 6. Both the main collector and the sub collector include a displacement collector, a velocity collector and an acceleration collector. The main collector 15 mainly collects displacements, velocities, and accelerations when the loading device is not in contact with the pile head, monitors the contact state between the loading device and the pile head, and reflects it in the loading performance. Is. The sub-collector supplementarily supports the main loading system by measuring the displacement, velocity and acceleration with respect to the flat ground, and at the same time, the dynamic characteristics before and after the contact between the pile head and the loading device during the loading process. It is for recording. By the multi-channel data measurement system, the data measured by the main collector 15, the sub-collector 16 and the pressure sensor 18 can be transmitted by a method such as PLC or DPU and input to the industrial intelligence database or directly connected to the computer and carried. Data is displayed and processed using multiple terminals such as telephones, tablets, and computers.

だけが残り、質量ブロックｍの大きさ及び秒速ωの大きさを変更することによって加力の大きさが動的に変更され、載荷力の大きさの動的な可変性を実現することができ、そのうちθは、向心力とＸ軸方向の力の夾角である。当該方法は、以下の工程を含む。 The present invention further includes a method of realizing a loading simulation by utilizing the above-mentioned dynamic loading simulation device of a pile head, and the principle of the method is as follows. As shown in FIGS. 12 and 13, in the operation of the gear group power transmission mechanism, the main gear 1003 is interlocked and rotated by the operation of the variable frequency motor, and the engagement between the main gear 1003 and the power transmission gear I1001 and The meshing between the power transmission gear I1001 and the power transmission gear II1002 causes the disk-type loading mechanism 2 to rotate, and the disk-type loading mechanism 2 located on the same side rotates in the opposite direction. During the rotation process of the disk-type loading mechanism 2, centrifugal force is generated on the large-mass block 204 and the small-mass block 208 with respect to the entire disk-type loading mechanism, and the centripetal force is applied in the horizontal X-axis direction and the vertical Y-axis direction. When disassembled, the resultant forces in the X-axis direction of the two disk-type loading mechanisms 2 located on the same side are canceled out, and the resultant forces in the Y-axis direction are added to generate a downward loading force. If the masses of the two mass blocks are the same, the resultant force in the X-axis direction is 0, which is the added force in the Y-axis direction.

Only remains, and by changing the size of the mass block m and the size of the speed ω per second, the magnitude of the applied force is dynamically changed, and the dynamic variability of the magnitude of the loading force can be realized. Of these, θ is the angle between the centripetal force and the force in the X-axis direction. The method includes the following steps.

During the loading process of the upper half circle, the magnetic poles of the electromagnet are adjusted, and the electromagnet on the large mass block side pulls the large mass block from beginning to end. At this time, the loading radius of the large mass block is r, and the electromagnet on the small mass block side has a small mass. The loading radius of the small mass block is 2r under the inhibitory action of the damper spring 205, which repels the block from beginning to end. The mass of the large mass block is M, the mass of the small mass block is m, and M = 2 m. At this time, the stress status of the two disk-type loading mechanisms located on the same side is as follows.

During the lower semicircular loading process, when the large mass block finishes the upper semicircular loading stage and reaches the central axis, the polarity of the electromagnet changes, and at this time, the electromagnet on the large mass block side suddenly repels the large mass block and has a large mass. The block can be swiftly flipped to move it from the center of the circle to a position of 2r, and then stopped under the inhibitory action of the damper spring. The electromagnet on the small mass block side attracts the small mass block, and at this time, the loading radius of the small mass block is r, and the stress status of the two disk-type loading mechanisms located on the same side at this time is as follows.

は０よりも大きく、構造は下方への載荷力を受ける。大質量ブロックが下半円載荷段階を終えて再び中心軸まで移動すると、電磁石の極性に再び変更が生じ、大質量ブロックが電磁石に引き付けられ、小質量ブロックが電磁石と反発し、大質量ブロックの載荷半径はｒとなり、小質量ブロックの載荷半径は２ｒとなり、これにより、上述の応力循環過程が繰り返される。上述の移動過程中、電磁石はダンパーばねの阻害作用下で移動を停止し、過大な衝撃により電磁石が破壊されてしまうのを防いでいる。 In the loading stage of the lower semicircular loading stage

Is greater than 0 and the structure receives a downward loading force. When the large mass block finishes the lower half circle loading stage and moves to the central axis again, the polarity of the electromagnet changes again, the large mass block is attracted to the electromagnet, the small mass block repels the electromagnet, and the mass block The loading radius is r, and the loading radius of the small mass block is 2r, whereby the stress circulation process described above is repeated. During the above-mentioned movement process, the electromagnet stops moving under the inhibitory action of the damper spring, and prevents the electromagnet from being destroyed by an excessive impact.

The dynamic loading simulation device for pile heads and the method thereof provided by the present invention have been introduced in detail above. In the present specification, the principles and embodiments of the present invention have been described with reference to specific examples, but the above description of the examples is merely an aid for understanding the methods and core ideas of the present invention. Those skilled in the art can make some modifications and modifications to the invention without departing from the principles of the invention, and these modifications and modifications also fall within the scope of the claims of the invention. Please understand that. Those skilled in the art can realize or use the present invention by the above description for the disclosed examples. Various modifications to those embodiments will be readily apparent to those of skill in the art, and the general principles defined herein are in the other embodiments without departing from the spirit or scope of the invention. Can be realized with. Therefore, the present invention is not limited to the examples shown herein, but is given the broadest scope consistent with the principles and novel features disclosed herein.

1 Housing case 2 Disc type loading mechanism 201 Disc case 202 Electromagnet 203 Damper block 204 Large mass block 205 Damper spring 206 Mass block slide shaft 207 Gasket 208 Small mass block 209 Power transmission spindle Nodal point 210 Electromagnet coil 3 Welding base plate I
4 Welding base plate II
5 Triangular support frame for main gear 501 Motor connection shaft 503 Alignment bearing I
6 Pile body 7 Fixed joint bar 8 Square support frame 801 Square support frame Stabilization plate 9 Triangular support frame for power transmission gear 901 Alignment bearing II
10 Gear group Power transmission mechanism 1001 Power transmission gear I
1002 Power transmission gear II
1003 Main gear 11 Ball hinge Support rod 1101 Outer pipe 1102 Bolt hole 1103 Inner pipe 12 Welding base plate III
13 Welding base plate IV
14 Power transmission spindle 15 Main collector 16 Sub collector 17 Ball hinge 18 Pressure sensor

Claims (9)

The housing case (1), a disk-type loading mechanism (2), a gear group power transmission mechanism (10), and an external support mechanism are included, and the disk-type loading mechanism (2) and the gear group power transmission mechanism (10) are described above. It is installed in the housing case (1), and the housing case (1) is placed on the top of the pile body (6).
The gear group power transmission mechanism (10) includes a power transmission gear I (1001), a power transmission gear II (1002) and a main gear (1003), and the main gear (1003) is a triangular support frame (5) for the main gear. The motor connecting shaft (501) is fixed to the center of the main gear (1003), and the motor connecting shaft (501) is the output of the variable frequency motor. Connected to a shaft, the main gear (1003) meshes with the power transmission gear I (1001) to transmit power, and the power transmission gear I (1001) meshes with the power transmission gear II (1002) to transmit power. The power transmission gear I (1001) and the power transmission gear II (1002) rotate in opposite directions, and both the power transmission gear I (1001) and the power transmission gear II (1002) are located at the center of the power transmission gear I (1001) and the power transmission gear II (1002). The power transmission spindle (14) is fixed, and the disk-type loading mechanism (2) is provided at each end of the power transmission spindle (14), and the disk-type loading mechanism (2) located on the same side is provided. 2) rotates in the opposite direction,
The disk-type loading mechanism (2) includes a mass block slide shaft (206), a disk case (201), a power transmission spindle node (209), a large mass block (204), and a small mass block (208). The block slide shaft (206) is installed in the disk case (201), and both ends of the mass block slide shaft (206) are fixedly joined to the inner wall of the disk case (201) via a gasket (207). The power transmission spindle node (209) is fixed to the central portion of the mass block slide shaft (206), and the power transmission spindle node (209) is fixedly joined to the end portion of the power transmission spindle (14). The large mass block (204) and the small mass block (208) are installed on both sides of the power transmission spindle node (209), and the large mass block (204) and the small mass block (208) are the mass. The block slide shaft (206) is slidably covered, and the outer surface of the mass block slide shaft (206) is covered with an electromagnet coil (210), and the large mass block (204) and the small mass block (204) are covered. The inner ring of the mass block (208) is a permanent magnet, and the mass block slide shaft (206) forms a repulsive force between the large mass block and the small mass block, and the mass block (204) and the mass block (204) and the said. A damper spring (205) is provided between the gasket (207) and the small mass block (208) and the gasket (207), and the large mass block (204) and the power transmission are transmitted. An electromagnet (202) and a damper block (203) are provided between the spindle node (209) and the small mass block (208) and the power transmission spindle node (209), respectively, and the electromagnet (20) is provided. 202) is oriented in the direction of the mass block, the electromagnet (202) and the damper block (203) are fixed and covered on the mass block slide shaft (206), and the electromagnet (202) and the damper The block (203) is fixedly joined, and the electromagnets (202) and the damper block (203) on both sides of the power transmission spindle node (209) are installed symmetrically with each other. Dynamic loading simulation device. Both the power transmission gear I (1001) and the power transmission gear II (1002) are connected to the housing case (1) via a power transmission gear triangular support frame (9), and the power transmission gear triangle. The support frame (9) includes a triangular frame body II and a centering bearing II (901), and one end of the triangular frame body II is in the vertical direction of the housing case (1) via a welding base plate I (3). It is fixedly joined to the side wall, and the other end of the triangular frame body II is fixedly joined to the horizontal bottom portion of the housing case (1) via the welding base plate IV (13), and is fixedly joined to the corner portion of the triangular frame body II. The centering bearing II (901) is provided, the centering bearing II (901) is fixedly joined to the triangular frame body II, and the power transmission spindle ( The dynamic loading simulation device for a pile head according to claim 1, wherein 14) is provided. The main gear (1003) is connected to the housing case (1) via the main gear triangular support frame (5), and the main gear triangular support frame (5) is aligned with the triangular frame body I. One end of the triangular frame body I including the bearing I (503) is fixedly joined to the vertical side wall of the housing case (1) via the welding base plate II (4), and the other end of the triangular frame body I is fixedly joined. The centering bearing I (503) is provided at a corner portion of the triangular frame body I, which is fixedly joined to the horizontal bottom portion of the housing case (1) via a welding base plate III (12). The alignment bearing I (503) is fixedly joined to the triangular frame body I, and the motor connection shaft (501) is provided at the center of the alignment bearing I (503). The dynamic loading simulation device for a pile head according to 1. Two power transmission gears I (1001) and two power transmission gears II (1002) are installed, and the main gear (1003) is simultaneously meshed with the two power transmission gears I (1001) to transmit power. One of the power transmission gears I (1001) meshes with each of the two power transmission gears II (1002) to transmit power, and the two power transmission gears I (1001) are fixed to the same power transmission spindle (14). The dynamic loading simulation device for a pile head according to claim 1, wherein the two power transmission gears II (1002) are fixed to the same power transmission spindle (14). The external support mechanism further includes the square support frame (8) and the ball hinge support rod (11), and the square support frame (8) is provided on the outer sides of the four surfaces of the housing case (1), respectively. Is installed, the bottom of the square support frame (8) is connected to the ground via a square support frame stabilizing plate (801), and the top of the square support frame (8) is connected to the ground via a ball hinge (17). The pile according to claim 1, wherein the pile is connected to one end of the hinge support rod (11), and the other end of the ball hinge support rod (11) is hinged to the housing case (1). Dynamic loading simulation device for the head. The square support frame (8) and the ball hinge support rod (11) have a telescopic structure, and the ball hinge support rod (11) includes an outer tube (1101) and an inner tube (1103), and the inner tube. (1103) is installed in the outer pipe (1101), the inner pipe (1103) slides in the outer pipe (1101), and both the outer pipe (1101) and the inner pipe (1103) have. The fifth aspect of the present invention is characterized in that a bolt hole (1102) is provided, and a bolt is inserted into the bolt hole (1102) to fix-join the outer pipe (1101) and the inner pipe (1103). The described pile head dynamic loading simulation device. An intelligence data collection and output system including a main collector (15), a sub-collector (16) and a pressure sensor (18) is further included, and the main collector (15) and the sub-collector (16) are the housing case. Installed inside the bottom of (1), the pressure sensor (18) is installed outside the bottom of the housing case (1), and the bottom of the housing case (1) and the top of the pile (6). The dynamic loading simulation device for a pile head according to claim 1, wherein the device is located between the two. The dynamic loading of a pile head according to claim 1, wherein both the large mass block and the small mass block are formed by fixing and joining two same semicircular mass blocks by a locking method. Simulation equipment. During the loading process of the upper half circle, the electric magnet on the large mass block side attracts the large mass block, the loading radius of the large mass block is r, the electric magnet on the small mass block side repels the small mass block, and the damper spring. The loading radius of the small mass block is 2r, the mass of the large mass block is M, the mass of the small mass block is m, and M = 2m, and they are located on the same side at this time. The stress status of the two disk-type loading mechanisms is as follows.

During the lower half-circle loading process, when the large-mass block finishes the upper half-circle loading stage and reaches the central axis, the polarity of the electromagnet changes, and the electromagnet on the large-mass block side repels the large-mass block, and the above-mentioned The loading radius of the large mass block is 2r, the electromagnet on the small mass block side attracts the small mass block, and the loading radius of the small mass block is r, and at this time, two disk-type loading mechanisms located on the same side. The stress status of is as follows,

The dynamic pile head according to claim 1, further comprising a step in which the above-mentioned stress circulation process is repeated when the large-mass block finishes the lower semicircular loading step and moves to the central axis again. A method of realizing a loading simulation using a loading simulation device.

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