Earthquake simulation platform monitoring device for engineering structure

Abstract

The invention relates to the technical field of earthquake simulation platforms, and discloses an earthquake simulation platform monitoring device for an engineering structure, and the device comprises an earthquake simulation platform which is installed on the top surface of a bottom plate; the mounting frame is fixed on the bottom plate, and the mounting frame is of a U-shaped structure; the electric hoist is mounted at the top of the mounting frame; the counterweight structure is arranged above the earthquake simulation platform, the counterweight structure comprises a counterweight water tank, the top surface of the counterweight water tank is connected with four branch slings, and the driving end of the electric hoist is connected with a main sling. According to the load adjusting mode, a traditional weight stack adjusting method is abandoned, the adjusting mode replaces the traditional weight stack adjusting method, operation is simpler, the load adjusting requirement can be quickly responded, and the working efficiency and flexibility are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of earthquake simulation platforms, and in particular relates to an earthquake simulation platform monitoring device for engineering structures. Background Art

[0002] The earthquake simulation platform monitoring device usually consists of an earthquake simulation vibration table, a sensor system, a data acquisition and analysis system, and a control system. These parts work together to simulate the response of engineering structures under real earthquake environments and collect relevant data for analysis.

[0003] After searching, the Chinese patent with publication number CN111398419 Bevel Gear discloses a seismic simulation platform monitoring device for engineering pile foundations, including a seismic simulation platform, a cylinder arranged above the seismic simulation platform, and at least one engineering pile foundation arranged inside the cylinder; a turntable is arranged in the middle position on the top of the seismic simulation platform, and the turntable can rotate. During the rotation of the turntable, the cylinder can be driven to rotate, and a plurality of support rods are arranged at intervals along the circumferential direction on the top of the turntable, and the top of the support rods is connected with the cylinder, and the cylinder is filled with liquefied soil; a plurality of calibration points are arranged at intervals along the length direction on the outside of the engineering pile foundation, and the At least one sensor is arranged at the calibration point; the sensor is sleeved on the outside of the engineering pile foundation, and a plurality of counterweights are arranged on the top of the engineering pile foundation, and the counterweights are staggered. The above scheme presses the pile foundation by the counterweights distributed in a staggered manner, and the load-bearing capacity of the pile foundation can be adjusted by changing the number of counterweights. The load-bearing capacity of the pile foundation can be monitored by changing the load-bearing capacity of the pile foundation. In addition, the counterweights distributed in a staggered manner can make the pile foundation evenly stressed at each position on the top of the pile foundation when the load-bearing capacity is large, and the deviation of the internal parameters of the pile foundation will not be caused by external factors. However, the above scheme still has the following shortcomings when it is actually used: The above-mentioned earthquake simulation platform monitoring device has significant disadvantages when adjusting the load applied to the pile foundation by adjusting the number of counterweights. Specifically, adjusting the number of counterweights requires staff to manually disassemble and reinstall related fixings. This process is cumbersome and time-consuming, which greatly limits the flexibility and efficiency of load adjustment. In addition, frequent disassembly and installation operations not only increase the labor intensity of staff, but may also cause equipment damage or safety hazards due to improper operation. Therefore, this scheme cannot achieve rapid adjustment of pile foundation loads and is difficult to meet the needs of efficient and accurate earthquake simulation tests. In order to overcome this disadvantage, it is necessary to develop a more convenient and efficient load adjustment mechanism to achieve rapid and accurate adjustment of pile foundation loads.

[0004] Therefore, it is necessary to design an earthquake simulation platform monitoring device for engineering structures to solve the above problems. Summary of the invention

[0005] To solve the above problems, the present invention discloses a seismic simulation platform monitoring device for engineering structures, which adopts a load adjustment method, which is not only simpler to operate, but also can quickly respond to the needs of load adjustment, thereby improving work efficiency and flexibility.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A seismic simulation platform monitoring device for an engineering structure, comprising: Base plate; An earthquake simulation platform, installed on the top surface of the base plate; A mounting frame, fixed to the bottom plate, the mounting frame being an inverted U-shaped structure; An electric hoist is installed on the top of the mounting frame; A counterweight structure is arranged above the earthquake simulation platform, the counterweight structure includes a counterweight water tank, the top surface of the counterweight water tank is connected to four branch slings, the driving end of the electric hoist is connected to the main sling, the ends of the four branch slings away from the counterweight water tank are all connected to the main sling, and the top surface of the counterweight water tank is provided with a through hole; A floating structure is arranged inside the counterweight water tank; A positioning structure, arranged on the counterweight water tank; It also includes a clamping structure, a driving structure, a rotating structure, and a locking structure, all of which are arranged on the bottom surface of the counterweight water tank.

[0007] As a preferred technical solution of the present invention, the counterweight structure further includes: A water supply tank, fixed on the side of the mounting frame; A water pump is installed on the water supply tank, a water inlet end of the water pump is connected to the water supply tank, and a water outlet end of the water pump is connected to the counterweight tank.

[0008] As a preferred technical solution of the present invention, the floating structure comprises: A floating plate is slidably arranged inside the counterweight water tank, and the side surface of the floating plate is in contact with the inner surface of the counterweight water tank; The two guide rods are both fixed inside the counterweight water tank, and the floating plate is slidably sleeved on the two guide rods.

[0009] As a preferred technical solution of the present invention, the positioning structure includes: A fixed cylinder is fixed on the top surface of the counterweight water tank, and the fixed cylinder is arranged directly opposite to the through opening; A vertical rod is fixed on the top surface of the floating plate, one end of the vertical rod away from the floating plate passes through the through hole, and the outer surface of the vertical rod fits with the inner surface of the through hole, and the interior of the vertical rod is a hollow structure; Two strip-shaped openings are both opened on the outer peripheral surface of the vertical rod, and the two strip-shaped openings are both connected to the inside of the vertical rod; Two pressing plates are slidably disposed in the two strip-shaped openings respectively; A plurality of springs, each disposed between the two pressing plates; A threaded rod, threadedly sleeved on the top of the vertical rod, one end of the threaded rod extending into the interior of the vertical rod; The moving block is rotatably mounted on one end of the threaded rod located inside the vertical rod. The moving block is in a truncated cone structure, and the top end of the moving block is larger than the bottom end.

[0010] As a preferred technical solution of the present invention, the clamping structure includes: A clamping cylinder is fixed on the bottom surface of the counterweight water tank, and the bottom end of the clamping cylinder is an open structure; A plurality of installation openings are provided on the outer peripheral surface of the clamping tube; A plurality of clamping plates are slidably disposed in the plurality of mounting openings, and each of the clamping plates is provided with an inclined surface; A lifting ring is slidably sleeved on the clamping tube, and the inner ring of the lifting ring and the outer peripheral surface of the clamping tube are in contact with each other; A collar is fixedly sleeved on the lifting ring, and a bottom opening of the collar is larger than a top opening.

[0011] As a preferred technical solution of the present invention, the driving structure includes: A fixing plate 1, fixed to the bottom surface of the counterweight water tank; Two connecting rods are both fixed on the side of the fixing plate 1; A second fixing plate is fixed to one end of the two connecting rods away from the first fixing plate; A screw rod is rotatably mounted between the first fixing plate and the second fixing plate; A movable plate, threadedly sleeved on the screw rod, and the movable plate is slidably sleeved on two connecting rods; A push rod is fixed on the side of the movable plate, and the push rod is arranged opposite to the sleeve ring.

[0012] As a preferred technical solution of the present invention, the rotating structure includes: A rotating shaft, rotatably mounted on the side of the second fixed plate; A transmission gear, fixedly sleeved on the rotating shaft; A gear ring, sleeved on the clamping cylinder and meshing with the transmission gear; A rotating cylinder is rotatably mounted on the clamping cylinder, and the gear ring is fixedly sleeved on the rotating cylinder; A grip rod fixed to the outer circumference of the rotating cylinder; Two bevel gears, one of which is fixedly sleeved on the rotating shaft, and the other is fixedly sleeved on the screw rod, and the two bevel gears are meshed with each other.

[0013] As a preferred technical solution of the present invention, the locking structure includes: A tooth plate, wherein teeth matching the transmission gear are arranged on the tooth plate, and the tooth plate and the transmission gear are meshed with each other; A connecting rod, fixed on the tooth plate, the connecting rod passes through the fixing plate 1 and is slidably connected with the fixing plate 1; A sleeve plate, fixedly sleeved on the connecting rod; Spring 2, one end of which is connected to the fixing plate 1, and the other end of which is connected to the sleeve plate; A rotating rod, rotatably mounted on an end of the connecting rod away from the toothed plate; The limiting rod is fixed on the outer peripheral surface of the rotating rod.

[0014] As a preferred technical solution of the present invention, the plurality of clamping plates are distributed in a circumferential array.

[0015] As a preferred technical solution of the present invention, an observation window is provided on the side of the counterweight water tank.

[0016] The beneficial effects of the present invention are: 1. After fixing the counterweight water tank, the device can effectively simulate the impact of earthquakes on pile foundations. Its beneficial effect is that the load applied to the pile foundation can be accurately controlled by simply adjusting the amount of water in the counterweight water tank. This process is achieved by starting the water pump to inject water from the water supply tank into the counterweight water tank. As the amount of water increases, the floating plate moves up, thereby increasing the overall load. This innovative adjustment method abandons the traditional counterweight plate adjustment method. This adjustment method replaces the traditional counterweight plate adjustment method. It is not only simpler to operate, but also can quickly respond to the needs of load adjustment, improving work efficiency and flexibility; 2. The rotation of the grip rod realizes the stable fixation of the counterweight water tank on the top of the pile foundation. The whole process shows a high degree of mechanical linkage and precision. The rotation of the grip rod drives the rotating cylinder and the gear ring on it to rotate, and then drives the transmission gear, the rotating shaft and the screw connected by the bevel gear to rotate in sequence. Under the limiting action of the connecting rod, the rotation of the screw is converted into a linear movement of the moving plate, and the moving plate then pushes the top rod to apply pressure to the collar. Due to the unique design of the collar, the bottom opening of the collar is larger than the top opening, so it can move downward smoothly under the extrusion of the top rod and pull the lifting ring to move downward synchronously. During the downward movement of the lifting ring, its edge squeezes the inclined surfaces of multiple clamping plates, causing the clamping plates to move synchronously and evenly and approach each other until they clamp the pile foundation tightly together. This clamping mechanism not only ensures the stable fixation of the counterweight water tank on the top of the pile foundation, but also reflects the simplicity of operation and the ingenuity of structure of the device, providing solid and reliable support for earthquake simulation tests. 3. By pulling the rotating rod, the device realizes a set of precise and efficient locking and unlocking mechanisms, ensuring that the counterweight water tank can be firmly fixed when needed, and can be easily released when needed. During the whole process, the movement of the rotating rod not only drives the movement of the connecting rod and the toothed plate, so that the toothed plate is separated from the transmission gear and the transmission gear is allowed to rotate freely, but also drives the movement of the limit rod. When the toothed plate is separated from the transmission gear, the limit rod can be moved out from under the counterweight water tank and rotated to a vertical state. Then, under the elastic force of spring 2, the connecting rod, the rotating rod and the limit rod are reset. During the reset process, the limit rod contacts and is blocked by the counterweight water tank, thereby firmly pressing on the surface of the counterweight water tank. This process also limits the position of the toothed plate to prevent it from contacting the transmission gear again. This design not only simplifies the operation process and improves work efficiency, but also ensures the stability and safety of the counterweight water tank during the fixing and releasing process, providing great convenience for related operations. 4. After the water adding operation is completed, the application of the clamping structure ensures the stable fixation of the floating plate position, thereby ensuring the overall stability of the counterweight water tank during the earthquake simulation test. The floating plate moves to drive the vertical rod to extend out of the counterweight water tank. The staff then turns the knob on the top of the threaded rod to drive the threaded rod to rotate and drive the moving block of the truncated cone structure to move downward. Due to its special design that the top end of the moving block is larger than the bottom end, it can effectively squeeze the two clamping plates during the descent process, so that they move away from each other and fit tightly against the inner wall of the fixed cylinder, thereby firmly clamping and fixing the vertical rod. This design not only prevents the floating plate from shaking during the test, but also avoids the continuous surging of water flow inside the counterweight water tank, effectively preventing the center of gravity of the counterweight water tank from changing due to the surging of water flow, thereby reducing the adverse effects on the test results and significantly improving the accuracy and reliability of the pile foundation earthquake simulation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A schematic diagram of the structure of a seismic simulation platform monitoring device for engineering structures proposed by the present invention; Figure 2 A schematic structural diagram of a seismic simulation platform monitoring device for engineering structures proposed by the present invention from another perspective; Figure 3 It is a structural schematic diagram of the counterweight water tank and the clamping structure; Figure 4 is a schematic diagram of the structure of the floating structure; Figure 5 It is a structural schematic diagram of the driving structure and the rotating structure; Figure 6 It is a cross-sectional structural schematic diagram of a counterweight water tank; Figure 7 The schematic diagram of the structure when the counterweight water tank blocks the limit rod; Figure 8 It is a schematic diagram of the cross-sectional structure of the vertical rod; Fig. 9 is a structural schematic diagram of the positioning structure; Fig.10 for Figure 5 A magnified view of the structure at the bevel gear; Fig.11 for Figure 7 Enlarged view of the structure at B.

[0018] List of Figure Symbols: 1. Bottom plate; 2. Earthquake simulation platform; 3. Mounting frame; 4. Electric hoist; 51. Counterweight water tank; 52. Water supply tank; 53. Water pump; 61. Floating plate; 62. Guide rod; 71. Fixed cylinder; 72. Vertical rod; 73. Pressing plate; 74. Spring 1; 75. Threaded rod; 76. Moving block; 81. Clamping cylinder; 82. Mounting port; 83. Clamping plate; 84. Lifting ring; 85. Sleeve ring; 91, fixed plate one; 92, connecting rod; 93, fixed plate two; 94, screw rod; 95, movable plate; 96, push rod; 101, rotating shaft; 102, transmission gear; 103, gear ring; 104, rotating cylinder; 105, grip rod; 106, bevel gear; 111, gear plate; 112, connecting rod; 113, sleeve plate; 114, spring two; 115, rotating rod; 116, limit rod. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0020] like Figure 1-11As shown, the earthquake simulation platform monitoring device for engineering structures of the present invention comprises a bottom plate 1; a earthquake simulation platform 2, which is installed on the top surface of the bottom plate 1; a mounting frame 3, which is fixed on the bottom plate 1, and the mounting frame 3 is an inverted U-shaped structure; an electric hoist 4, which is installed in the middle of the top of the mounting frame 3; The earthquake simulation platform monitoring device also includes a counterweight structure, which is arranged above the earthquake simulation platform 2. The counterweight structure includes a counterweight water tank 51. An observation window is arranged on the side of the counterweight water tank 51. Four branch slings are connected to the top surface of the counterweight water tank 51. The driving end of the electric hoist 4 is connected to the main sling. The ends of the four branch slings away from the counterweight water tank 51 are all connected to the main sling. A through hole is opened on the top surface of the counterweight water tank 51. The counterweight structure also includes: a water supply tank 52, which is fixed on the side of the mounting frame 3; a water pump 53, which is installed on the water supply tank 52, the water inlet end of the water pump 53 is connected to the water supply tank 52, and the water outlet end of the water pump 53 is connected to the counterweight water tank 51. The counterweight water tank is fixed. After 51, the staff can use the earthquake simulation platform 2 to provide earthquake simulation for the pile foundation. During the simulation process, the staff can adjust the load of the counterweight water tank 51 on the pile foundation by adjusting the water volume in the counterweight water tank 51. Specifically, the staff starts the water pump 53. When the water pump 53 is running, it can extract the water flow in the water supply tank 52 and pump the water pump 53 into the counterweight water tank 51. With the entry of the water flow, the floating plate 61 will move up. The more water flow in the counterweight water tank 51, the greater the load of the counterweight water tank 51 on the pile foundation. This adjustment structure replaces the traditional method of using counterweight plates for adjustment, and can quickly adjust the pile foundation load, which is convenient to operate. The earthquake simulation platform monitoring device also includes a floating structure, which is arranged inside the counterweight water tank 51. The floating structure includes: a floating plate 61, which is slidably arranged inside the counterweight water tank 51, and the side surface of the floating plate 61 and the inner surface of the counterweight water tank 51 are mutually fitted; two guide rods 62, both fixed inside the counterweight water tank 51, and the floating plate 61 is slidably sleeved on the two guide rods 62; The earthquake simulation platform monitoring device also includes a positioning structure, which is arranged on the counterweight water tank 51, and the positioning structure includes: a fixed cylinder 71, fixed on the top surface of the counterweight water tank 51, and the fixed cylinder 71 is arranged opposite to the through-hole; a vertical rod 72, fixed on the top surface of the floating plate 61, and the end of the vertical rod 72 away from the floating plate 61 passes through the through-hole, and the outer surface of the vertical rod 72 and the inner surface of the through-hole are fitted with each other, and the interior of the vertical rod 72 is a hollow structure; two strip openings are both opened on the outer circumferential surface of the vertical rod 72, and the two strip openings are connected to the interior of the vertical rod 72; two clamping plates 73 are respectively slidably arranged in the two strip openings; a plurality of springs 74 are arranged between the two clamping plates 73; a threaded rod 75, threadedly sleeved on the top of the vertical rod 72, and one end of the threaded rod 75 extends to the interior of the vertical rod 72; a moving block 76, which is rotated to install The movable block 76 is installed at one end of the threaded rod 75 located inside the vertical rod 72, and the movable block 76 is in a truncated cone structure, and the top of the movable block 76 is larger than the bottom (inverted trapezoid, with inclined surfaces on both sides). When the two clamping plates 73 move away from each other, the two clamping plates 73 can press the inner surface of the fixed tube 71. At this time, the pressure exerted by the two clamping plates 73 on the fixed tube 71 together fixes the vertical rod 72. When the vertical rod 72 is fixed, the floating plate 61 is fixed accordingly. The design of the clamping structure can prevent the floating plate 61 from shaking during the earthquake simulation test, thereby preventing the water flow inside the counterweight water tank 51 from constantly surging, in order to prevent the center of gravity of the counterweight water tank 51 from changing due to the surging of the water flow. This design can reduce the influence of the change of the center of gravity of the counterweight water tank 51 on the test results, and improve the accuracy of the pile foundation earthquake simulation test. The earthquake simulation platform monitoring device also includes a clamping structure, which is arranged on the bottom surface of the counterweight water tank 51. The clamping structure includes: a clamping tube 81, which is fixed to the bottom surface of the counterweight water tank 51, and the bottom end of the clamping tube 81 is an open structure; a plurality of installation openings 82, which are all opened on the outer peripheral surface of the clamping tube 81; a plurality of clamping plates 83, which are respectively slidably arranged in the plurality of installation openings 82, each clamping plate 83 is provided with an inclined surface, and the plurality of clamping plates 83 are distributed in a circumferential array; a lifting ring 84, which is slidably sleeved on the clamping tube 81, and the lifting ring 84 is arranged on the lifting ring 84. The inner ring of the ring 84 fits with the outer circumference of the clamping tube 81; the sleeve 85 is fixedly sleeved on the lifting ring 84, and the bottom opening of the sleeve 85 is larger than the top opening. When the lifting ring 84 moves downward, it can squeeze the inclined surfaces of the clamping plates 83, so that the clamping plates 83 move synchronously and approach each other until the clamping plates 83 clamp the pile foundation together. At this time, the clamping plates 83 clamp the pile foundation together. Under the clamping action of the clamping plates 83, the counterweight water tank 51 is fixed to the top of the pile foundation; The earthquake simulation platform monitoring device also includes a driving structure, which is arranged on the bottom surface of the counterweight water tank 51, and the driving structure includes: a fixed plate 91, which is fixed on the bottom surface of the counterweight water tank 51; two connecting rods 92, which are both fixed on the side of the fixed plate 91; a fixed plate 93, which is fixed on one end of the two connecting rods 92 away from the fixed plate 91; a screw rod 94, which is rotatably installed between the fixed plate 91 and the fixed plate 93; a movable plate 95, which is threadedly sleeved on the screw rod 94, and the movable plate 95 is slidably sleeved on the two connecting rods 92; a push rod 96, which is fixed on the side of the movable plate 95, and the push rod 96 is arranged directly opposite to the collar 85; The earthquake simulation platform monitoring device also includes a rotating structure, which is arranged on the bottom surface of the counterweight water tank 51, and the rotating structure includes: a rotating shaft 101, which is rotatably mounted on the side of the fixed plate 93; a transmission gear 102, which is fixedly sleeved on the rotating shaft 101; a ring gear 103, which is sleeved on the clamping cylinder 81 and meshes with the transmission gear 102; a rotating cylinder 104, which is rotatably mounted on the clamping cylinder 81, and the ring gear 103 is fixedly sleeved on the rotating cylinder 104; a gripping rod 105, which is fixed on the outer peripheral surface of the rotating cylinder 104; two bevel gears 106, one of which is fixedly sleeved on the rotating shaft 101, and the other is fixedly sleeved on the screw rod 94, and the two bevel gears 106 are mutually engaged. When the rotating cylinder 104 rotates, the gear ring 103 thereon rotates accordingly and drives the transmission gear 102 to rotate. When the transmission gear 102 rotates, it can drive the rotating shaft 101 to rotate. The rotating shaft 101 drives the screw rod 94 to rotate through two mutually meshing bevel gears 106. Under the limiting action of the two connecting rods 92, the movable plate 95 cannot rotate with the screw rod 94. Therefore, when the screw rod 94 rotates, it can drive the movable plate 95 to move, so that the movable plate 95 drives the push rod 96 to move. The push rod 96 will squeeze the outer surface of the collar 85 during the movement. Since the bottom opening of the collar 85 is larger than the top opening, the collar 85 can move downward when squeezed, and drive the lifting ring 84 to move downward; The earthquake simulation platform monitoring device also includes a locking structure, which is arranged on the bottom surface of the counterweight water tank 51. The locking structure includes: a tooth plate 111, on which teeth matching the transmission gear 102 are arranged, and the tooth plate 111 and the transmission gear 102 are meshed with each other; a connecting rod 112, which is fixed on the tooth plate 111, and the connecting rod 112 passes through the fixed plate 91 and is slidably connected with the fixed plate 91; a sleeve plate 113, which is fixedly sleeved on the connecting rod 112; a spring 114, one end of which is connected to the fixed plate 111 is connected with one end thereof, and the other end is connected with the sleeve plate 113; the rotating rod 115 is rotatably mounted on the end of the connecting rod 112 away from the tooth plate 111; the limiting rod 116 is fixed on the outer circumferential surface of the rotating rod 115. When the staff pulls the rotating rod 115, the rotating rod 115 drives the connecting rod 112 to move. When the connecting rod 112 moves, it can drive the tooth plate 111 to move until the tooth plate 111 is separated from the transmission gear 102. Without the restriction of the tooth plate 111, the transmission gear 102 can rotate freely.

[0021] The specific working principle of the present invention is as follows: When the earthquake simulation platform monitoring device for engineering structures proposed by the present invention is in use, the staff first fixes the pile foundation on the earthquake simulation platform 2, and then the staff aligns the clamping tube 81 with the pile foundation, and controls the electric hoist 4 to operate, so that the counterweight water tank 51 descends, and when the counterweight water tank 51 moves downward, it can drive the clamping tube 81 to descend, so that the clamping tube 81 is sleeved on the top of the pile foundation. Further, the staff pulls the rotating rod 115, so that the rotating rod 115 drives the connecting rod 112 to move, and when the connecting rod 112 moves, it can drive the tooth plate 111 to move until the tooth plate 111 is separated from the transmission gear 102. Without the restriction of the tooth plate 111, the transmission gear 102 can rotate freely. In addition, the rotating rod 115 can also drive the limit rod 116 to move when it moves. When the gear 102 is separated, the limit rod 116 can move out from under the counterweight water tank 51. At this time, the staff twists the rotating rod 115, so that the rotating rod 115 drives the limit rod 116 to rotate until the limit rod 116 rotates to a vertical state. Further, the staff loosens the rotating rod 115, and the connecting rod 112 is reset under the elastic force of the spring 114, and the rotating rod 115 and the limit rod 116 are also reset accordingly. The limit rod 116 will contact the counterweight water tank 51 during the reset process. At this time, the counterweight water tank 51 blocks the reset of the limit rod 116, so that the limit rod 116 is pressed on the surface of the counterweight water tank 51. When the position of the limit rod 116 is restricted, the position of the tooth plate 111 is also restricted, which can prevent the tooth plate 111 from contacting the transmission gear 102. After adjusting the position of the toothed plate 111, the staff rotates the grip 105 so that the grip 105 drives the rotating cylinder 104 to rotate. When the rotating cylinder 104 rotates, the gear ring 103 thereon rotates accordingly and drives the transmission gear 102 to rotate. When the transmission gear 102 rotates, it can drive the rotating shaft 101 to rotate. The rotating shaft 101 drives the screw rod 94 to rotate through two mutually meshing bevel gears 106. Under the limiting effect of the two connecting rods 92, the movable plate 95 cannot rotate with the screw rod 94. Therefore, when the screw rod 94 rotates, it can drive the movable plate 95 to move, so that the movable plate 95 drives the top The rod 96 moves, and the top rod 96 squeezes the outer surface of the collar 85 during the movement. Since the bottom opening of the collar 85 is larger than the top opening, the collar 85 can move downward when squeezed, and drive the lifting ring 84 to move downward. When the lifting ring 84 moves downward, it can squeeze the inclined surfaces of the clamping plates 83, so that the clamping plates 83 move synchronously and approach each other until the clamping plates 83 clamp the pile foundation together. At this time, the clamping plates 83 clamp the pile foundation together. Under the clamping action of the clamping plates 83, the counterweight water tank 51 is fixed to the top of the pile foundation. After fixing the counterweight water tank 51, the staff can use the earthquake simulation platform 2 to provide earthquake simulation for the pile foundation. During the simulation, the staff can adjust the load of the counterweight water tank 51 on the pile foundation by adjusting the water volume in the counterweight water tank 51. Specifically, the staff starts the water pump 53. When the water pump 53 is running, it can extract the water flow in the water supply tank 52 and pump the water pump 53 into the counterweight water tank 51. With the entry of the water flow, the floating plate 61 will move up. The more water flow in the counterweight water tank 51, the greater the load of the counterweight water tank 51 on the pile foundation. This adjustment structure replaces the traditional method of using counterweight plates for adjustment, and can quickly adjust the pile foundation load, which is convenient to operate. When the water adding operation is completed, the staff can use the clamping structure to fix the position of the floating plate 61. Specifically, when the floating plate 61 moves, it drives the vertical rod 72 to move, so that the vertical rod 72 extends out of the counterweight water tank 51. After the water adding is completed, the staff turns the knob on the top of the threaded rod 75 to rotate the threaded rod 75. When the threaded rod 75 rotates, it drives the moving block 76 to move downward. The moving block 76 has a truncated cone structure. The top end of the moving block 76 is larger than the bottom end. Therefore, when the moving block 76 moves downward, it can squeeze the two clamping plates 73, so that the two clamping plates 73 move away from each other. When the two clamping plates 73 move away from each other, the two clamping plates 73 can press the inner surface of the fixed cylinder 71. At this time, the two clamping plates 73 exert pressure on the fixed cylinder The pressure on 71 plays a role in fixing the vertical rod 72. When the vertical rod 72 is fixed, the floating plate 61 is also fixed. The design of the compression structure can prevent the floating plate 61 from shaking during the earthquake simulation test, thereby preventing the water flow inside the counterweight water tank 51 from constantly surging. The purpose is to prevent the center of gravity of the counterweight water tank 51 from changing due to the surging of the water flow. This design can reduce the impact of the change of the center of gravity of the counterweight water tank 51 on the test results and improve the accuracy of the pile foundation earthquake simulation test. It is worth noting that the earthquake simulation platform monitoring device for pile foundation earthquake simulation detection is an existing technology, and the data collection and analysis and control equipment such as the control system adopt well-known conventional means, which will not be described in detail here. .

[0022] It should be noted that the above content only illustrates the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims

1. A seismic simulation platform monitoring device for engineering structures, characterized in that: include: Bottom plate (1); An earthquake simulation platform (2) installed on the top surface of the base plate (1); A mounting frame (3) fixed on the base plate (1), the mounting frame (3) being an inverted U-shaped structure; An electric hoist (4) mounted on the top of the mounting frame (3); A counterweight structure is arranged above the earthquake simulation platform (2), the counterweight structure comprising a counterweight water tank (51), the top surface of the counterweight water tank (51) is connected to four branch slings, the driving end of the electric hoist (4) is connected to the main sling, the ends of the four branch slings away from the counterweight water tank (51) are all connected to the main sling, and the top surface of the counterweight water tank (51) is provided with a through hole; A floating structure, arranged inside the counterweight water tank (51); A positioning structure, arranged on the counterweight water tank (51); It also includes a clamping structure, a driving structure, a rotating structure, and a locking structure, all of which are arranged on the bottom surface of the counterweight water tank (51).

2. The earthquake simulation platform monitoring device for engineering structures according to claim 1, characterized in that: The counterweight structure also includes: A water supply tank (52) fixed on a side of the mounting frame (3); A water pump (53) is installed on the water supply tank (52); a water inlet end of the water pump (53) is connected to the water supply tank (52); and a water outlet end of the water pump (53) is connected to the counterweight tank (51).

3. The earthquake simulation platform monitoring device for engineering structures according to claim 2, characterized in that: The floating structure comprises: A floating plate (61) is slidably disposed inside the counterweight water tank (51), and the side surface of the floating plate (61) and the inner surface of the counterweight water tank (51) are in contact with each other; The two guide rods (62) are both fixed inside the counterweight water tank (51), and the floating plate (61) is slidably sleeved on the two guide rods (62).

4. The earthquake simulation platform monitoring device for engineering structures according to claim 3, characterized in that: The positioning structure comprises: A fixed cylinder (71) is fixed on the top surface of the counterweight water tank (51), and the fixed cylinder (71) is arranged opposite to the through opening; A vertical rod (72) is fixed on the top surface of the floating plate (61), one end of the vertical rod (72) away from the floating plate (61) passes through the through hole, and the outer surface of the vertical rod (72) and the inner surface of the through hole are in contact with each other, and the interior of the vertical rod (72) is a hollow structure; Two strip-shaped openings are both opened on the outer peripheral surface of the vertical rod (72), and the two strip-shaped openings are both connected to the interior of the vertical rod (72); Two pressing plates (73) are slidably disposed in the two strip-shaped openings respectively; A plurality of springs (74), each disposed between the two pressing plates (73); A threaded rod (75) threadably sleeved on the top end of the vertical rod (72), one end of the threaded rod (75) extending into the interior of the vertical rod (72); The moving block (76) is rotatably mounted on one end of the threaded rod (75) located inside the vertical rod (72); the moving block (76) is a truncated cone structure, and the top end of the moving block (76) is larger than the bottom end.

5. The earthquake simulation platform monitoring device for engineering structures according to claim 1, characterized in that: The clamping structure comprises: A clamping tube (81) is fixed to the bottom surface of the counterweight water tank (51), and the bottom end of the clamping tube (81) is an open structure; A plurality of installation openings (82) are provided on the outer peripheral surface of the clamping tube (81); A plurality of clamping plates (83) are respectively slidably disposed in the plurality of mounting openings (82), and each of the clamping plates (83) is provided with an inclined surface; A lifting ring (84) is slidably sleeved on the clamping tube (81), and the inner ring of the lifting ring (84) and the outer peripheral surface of the clamping tube (81) are in contact with each other; A sleeve ring (85) is fixedly sleeved on the lifting ring (84), and a bottom opening of the sleeve ring (85) is larger than a top opening.

6. The earthquake simulation platform monitoring device for engineering structures according to claim 5, characterized in that: The driving structure comprises: A fixing plate 1 (91), fixed to the bottom surface of the counterweight water tank (51); Two connecting rods (92) are both fixed on the side of the fixing plate 1 (91); A second fixing plate (93) fixed to an end of the two connecting rods (92) away from the first fixing plate (91); A screw rod (94) is rotatably mounted between the first fixing plate (91) and the second fixing plate (93); A movable plate (95) is threadedly sleeved on the screw rod (94), and the movable plate (95) is slidably sleeved on the two connecting rods (92); A push rod (96) is fixed on the side of the movable plate (95), and the push rod (96) is arranged opposite to the sleeve ring (85).

7. The earthquake simulation platform monitoring device for engineering structures according to claim 6, characterized in that: The rotating structure comprises: A rotating shaft (101) is rotatably mounted on a side surface of the second fixing plate (93); A transmission gear (102) fixedly sleeved on the rotating shaft (101); A gear ring (103) is sleeved on the clamping cylinder (81) and meshes with the transmission gear (102); A rotating cylinder (104) is rotatably mounted on the clamping cylinder (81), and the gear ring (103) is fixedly sleeved on the rotating cylinder (104); A grip rod (105) fixed to the outer peripheral surface of the rotating cylinder (104); Two bevel gears (106), one of the bevel gears (106) is fixedly sleeved on the rotating shaft (101), and the other bevel gear (106) is fixedly sleeved on the screw rod (94), and the two bevel gears (106) are meshed with each other.

8. The earthquake simulation platform monitoring device for engineering structures according to claim 7, characterized in that: The locking structure comprises: a tooth plate (111), wherein the tooth plate (111) is provided with teeth matching the transmission gear (102), and the tooth plate (111) and the transmission gear (102) are meshed with each other; A connecting rod (112) is fixed on the tooth plate (111), and the connecting rod (112) passes through the fixing plate 1 (91) and is slidably connected to the fixing plate 1 (91); A sleeve plate (113) fixedly sleeved on the connecting rod (112); Spring 2 (114), one end of which is connected to the fixing plate 1 (91), and the other end of which is connected to the sleeve plate (113); A rotating rod (115) rotatably mounted on an end of the connecting rod (112) away from the tooth plate (111); The limiting rod (116) is fixed on the outer peripheral surface of the rotating rod (115).

9. The earthquake simulation platform monitoring device for engineering structures according to claim 5, characterized in that: The plurality of clamping plates (83) are distributed in a circumferential array.

10. The earthquake simulation platform monitoring device for engineering structures according to claim 1, characterized in that: An observation window is provided on the side of the counterweight water tank (51).

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