A seismic simulation platform monitoring device for an engineered structure

Abstract

The present application relates to the technical field of earthquake simulation platform, and disclose a kind of for engineering structure earthquake simulation platform monitoring device, including earthquake simulation platform, installation in the top surface of bottom plate;Mounting bracket, fixed on the bottom plate, the mounting bracket is U-shaped structure;Electric hoist, installation in the top of mounting bracket;Counterweight structure, set above the earthquake simulation platform, the counterweight structure includes counterweight water tank, the top surface of the counterweight water tank is connected with four branch slings, the drive end of electric hoist is connected with main sling.The load adjustment mode of the present application discards the traditional counterweight piece adjustment method, this adjustment mode replaces the traditional counterweight piece adjustment method, not only more simple operation, but also can quickly respond to the demand of load adjustment, improve work efficiency and flexibility.

Description

Technical Field

[0001] The present 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] An 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 an earthquake simulation platform monitoring device for engineering pile foundations, including an earthquake simulation platform, a cylinder arranged above the earthquake simulation platform, and at least one engineering pile foundation arranged inside the cylinder; a turntable is arranged in the middle position of the top of the earthquake simulation platform, and the turntable can rotate. During the rotation of the turntable, it can drive the cylinder to rotate. A plurality of support rods are arranged at intervals along the circumference of the top of the turntable. The top of the support rod is connected to the cylinder, and the interior of 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. At least one sensor is provided at the calibration point; the sensor is sleeved on the outside of the engineering pile foundation, and a plurality of counterweights are provided on the top of the engineering pile foundation, and the counterweights are staggered. The above scheme presses the pile foundation by the staggered counterweights, and the load-bearing capacity of the pile foundation can be adjusted by changing the number of counterweights. By changing the load-bearing capacity of the pile foundation, the compressive capacity of the pile foundation can be monitored. In addition, the staggered counterweights can make the pile foundation evenly stressed at all positions on the top of the pile foundation when the load-bearing capacity is large, and will not cause deviations in the internal parameters of the pile foundation due to external factors. However, the above scheme still has the following shortcomings when used in practice:

[0004] 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, greatly limiting 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 solution 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.

[0005] Therefore, it is necessary to design an earthquake simulation platform monitoring device for engineering structures to solve the above problems. Summary of the Invention

[0006] To solve the above problems, the application discloses a seismic simulation platform monitoring device for engineering structures, which adopts a load adjusting mode, is simple to operate, can quickly respond to the demand for load adjustment, and improves work efficiency and flexibility.

[0007] To achieve the above object, the technical scheme of the application is as follows:

[0008] A seismic simulation platform monitoring device for engineering structures comprises:

[0009] a bottom plate;

[0010] a seismic simulation platform installed on the top surface of the bottom plate;

[0011] a mounting frame fixed on the bottom plate, wherein the mounting frame has an inverted U-shaped structure;

[0012] an electric hoist installed on the top of the mounting frame;

[0013] a counterweight structure arranged above the seismic simulation platform, wherein the counterweight structure comprises a counterweight water tank, the top surface of the counterweight water tank is connected with four branch hoisting ropes, the driving end of the electric hoist is connected with a main hoisting rope, the four branch hoisting ropes are connected with the main hoisting rope at the ends away from the counterweight water tank, and the top surface of the counterweight water tank is provided with a through hole;

[0014] a floating structure arranged in the counterweight water tank;

[0015] a positioning structure arranged on the counterweight water tank;

[0016] and further comprises a clamping structure, a driving structure, a rotating structure and a locking structure, which are all arranged on the bottom surface of the counterweight water tank.

[0017] As a preferred technical scheme of the application, the counterweight structure further comprises:

[0018] a water supply tank fixed on the side surface of the mounting frame;

[0019] a water pump installed on the water supply tank, wherein the water inlet end of the water pump is in communication with the water supply tank, and the water outlet end of the water pump is in communication with the counterweight water tank.

[0020] As a preferred technical scheme of the application, the floating structure comprises:

[0021] a floating plate slidingly arranged in the counterweight water tank, wherein the side surface of the floating plate is in close contact with the inner surface of the counterweight water tank;

[0022] two guide rods fixed in the counterweight water tank, and the floating plate is slidingly sleeved on the two guide rods.

[0023] As a preferred technical solution of the present invention, the positioning structure includes:

[0024] A fixed cylinder is fixed on the top surface of the counterweight water tank, and the fixed cylinder is arranged opposite to the through opening;

[0025] A vertical rod is fixed on the top surface of the floating plate, wherein one end of the vertical rod away from the floating plate passes through the through-hole, and the outer surface of the vertical rod is in contact with the inner surface of the through-hole, and the interior of the vertical rod is a hollow structure;

[0026] 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 interior of the vertical rod;

[0027] Two pressing plates are slidably disposed in the two strip-shaped openings respectively;

[0028] a plurality of springs, each disposed between the two pressing plates;

[0029] 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;

[0030] 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.

[0031] As a preferred technical solution of the present invention, the clamping structure includes:

[0032] A clamping cylinder is fixed to the bottom surface of the counterweight water tank, and the bottom end of the clamping cylinder is an open structure;

[0033] A plurality of mounting openings are provided on the outer peripheral surface of the clamping tube;

[0034] 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;

[0035] A lifting ring is slidably sleeved on the clamping cylinder, and the inner ring of the lifting ring is in contact with the outer circumference of the clamping cylinder;

[0036] The collar is fixedly sleeved on the lifting ring, and the bottom opening of the collar is larger than the top opening.

[0037] As a preferred technical solution of the present invention, the driving structure includes:

[0038] A first fixing plate, fixed to the bottom surface of the counterweight water tank;

[0039] Two connecting rods, both fixed to the side of the fixing plate 1;

[0040] The second fixing plate is fixed at the ends of the two connecting rods away from the first fixing plate.

[0041] The screw rod is rotatably installed between the first fixing plate and the second fixing plate.

[0042] The moving plate is threadedly sleeved on the screw rod, and the moving plate is slidably sleeved on the two connecting rods.

[0043] The top rod is fixed on the side of the moving plate, and the top rod is opposite to the sleeve ring.

[0044] As a preferred technical solution of the present application, the rotating structure comprises:

[0045] The rotating shaft is rotatably installed on the side of the second fixing plate.

[0046] The transmission gear is fixedly sleeved on the rotating shaft.

[0047] The gear ring is sleeved on the clamping cylinder and is in meshing connection with the transmission gear.

[0048] The rotating cylinder is rotatably installed on the clamping cylinder, and the gear ring is fixedly sleeved on the rotating cylinder.

[0049] The handle is fixed on the outer circumferential surface of the rotating cylinder.

[0050] The two bevel gears are in meshing connection with each other, one of the bevel gears is fixedly sleeved on the rotating shaft, and the other bevel gear is fixedly sleeved on the screw rod.

[0051] As a preferred technical solution of the present application, the locking structure comprises:

[0052] The toothed plate is provided with teeth matched with the transmission gear, and the toothed plate is in meshing connection with the transmission gear.

[0053] The connecting rod is fixed on the toothed plate, the connecting rod passes through the first fixing plate, and the connecting rod is in sliding connection with the first fixing plate.

[0054] The sleeve plate is fixedly sleeved on the connecting rod.

[0055] The second spring has one end connected with the first fixing plate and the other end connected with the sleeve plate.

[0056] The rotating rod is rotatably installed at the end of the connecting rod away from the toothed plate.

[0057] The limiting rod is fixed on the outer circumferential surface of the rotating rod.

[0058] As a preferred technical solution of the present application, the plurality of clamping plates are arranged in a circumferential array.

[0059] As a preferred technical solution of the present application, the side of the counterweight water tank is provided with an observation window.

[0060] The present application has the following advantages:

[0061] 1. After fixing the counterweight water tank, the device can effectively simulate the impact of earthquakes on pile foundations. The beneficial effect is that by simply adjusting the water volume in the counterweight water tank, the load applied to the pile foundation can be accurately controlled. This process is achieved by starting the water pump to inject water from the water supply tank into the counterweight water tank. As the water volume increases, the floating plate moves up, thereby increasing the overall load. This innovative adjustment method eliminates the traditional counterweight piece adjustment method. This adjustment method replaces the traditional counterweight piece adjustment method, which not only makes the operation simpler, but also quickly responds to the demand for load adjustment, improving work efficiency and flexibility.

[0062] 2. The rotation of the handle bar achieves stable fixation of the counterweight water tank at the top of the pile foundation. The entire process demonstrates high mechanical linkage and precision. The rotation of the handle bar drives the rotation of the rotating cylinder and the gear ring on it, and then drives the transmission gear, the rotating shaft, and the lead screw connected through the bevel gear to rotate in turn. Under the limiting action of the connecting rod, the rotation of the lead screw is converted into the linear movement of the moving plate. The moving plate in turn pushes the top rod to exert pressure on the collar. The collar, due to its unique design, has a larger bottom opening than a top opening. Therefore, under the extrusion of the top rod, it can smoothly move downward and pull the lifting ring to move downward synchronously. During the downward movement of the lifting ring, its edges extrude the inclined surfaces of the multiple clamping plates, causing the clamping plates to move synchronously and uniformly and move closer to each other until they collectively and tightly clamp the pile foundation. This clamping mechanism not only ensures the stable fixation of the counterweight water tank at the top of the pile foundation, but also embodies the simplicity of operation and the ingenuity of the structure, providing a solid and reliable support for the earthquake simulation test.

[0063] 3. By pulling the rotating rod, the device realizes a precise and efficient locking and unlocking mechanism, ensuring that the counterweight water tank can be stably fixed when needed and easily released when needed. During the entire process, the movement of the rotating rod not only drives the movement of the connecting rod and the tooth plate, causing the tooth plate to separate from the transmission gear and allowing the transmission gear to rotate freely, but also drives the movement of the limiting rod. When the tooth plate separates from the transmission gear, the limiting rod can move out from below the counterweight water tank and rotate to the vertical state. Subsequently, under the elastic force of spring two, the connecting rod, the rotating rod, and the limiting rod are reset. During the resetting process, the limiting rod contacts and is blocked by the counterweight water tank, thereby stably pressing on the surface of the counterweight water tank. This process also limits the position of the tooth plate, preventing 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 fixation and release process, providing great convenience for related operations.

[0064] 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 vertical rod is extended out of the counterweight water tank through the movement of the floating plate. The staff then turns the knob on the top of the threaded rod to drive the threaded rod to rotate and drive the frustum-shaped moving block 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 the vertical rod. This design not only prevents the floating plate from shaking during the test, but also avoids the continuous surge of water flow inside the counterweight water tank, effectively preventing the center of gravity of the counterweight water tank from changing due to the surge 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

[0065] Figure 1 This is a structural diagram of a seismic simulation platform monitoring device for engineering structures proposed by the present invention;

[0066] Figure 2 This is a structural schematic diagram of a seismic simulation platform monitoring device for engineering structures proposed by the present invention from another perspective;

[0067] Figure 3 It is a structural diagram of the counterweight water tank and the clamping structure;

[0068] Figure 4 is a structural diagram of a floating structure;

[0069] Figure 5 It is a structural diagram of the driving structure and the rotating structure;

[0070] Figure 6 It is a cross-sectional structural diagram of the counterweight water tank;

[0071] Figure 7 This is a structural diagram when the counterweight water tank blocks the limit rod;

[0072] Figure 8 Schematic diagram of the cross-sectional structure of the vertical rod;

[0073] Figure 9 It is a structural diagram of the positioning structure;

[0074] Figure 10 for Figure 5 A magnified view of the bevel gear structure;

[0075] Figure 11 for Figure 7 A magnified view of the structure at point B.

[0076] List of Figure Symbols:

[0077] 1. Base 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 1; 92, connecting rod; 93, fixed plate 2; 94, screw; 95, movable plate; 96, push rod; 101, rotating shaft; 102, transmission gear; 103, ring gear; 104, rotating cylinder; 105, grip rod; 106, bevel gear; 111, gear plate; 112, connecting rod; 113, sleeve plate; 114, spring 2; 115, rotating rod; 116, limit rod. DETAILED DESCRIPTION

[0078] The present invention will be further described below with reference to 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.

[0079] like Figures 1-11 As shown, the earthquake simulation platform monitoring device for engineering structures according to the present invention comprises a base plate 1; an earthquake simulation platform 2, mounted on the top surface of the base plate 1; a mounting frame 3, fixed to the base plate 1, the mounting frame 3 being an inverted U-shaped structure; and an electric hoist 4, mounted in the middle of the top of the mounting frame 3.

[0080] 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 provided on the side of the 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. A through-hole is provided on the top surface of the counterweight water tank 51. The counterweight structure also includes: a water supply tank 52, which is fixed to 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 applied by 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 53 into the counterweight water tank 51. With the entry of water flow, the floating plate 61 will move up accordingly. The more water flow in the counterweight water tank 51, the greater the load applied by the counterweight water tank 51 on the pile foundation. This adjustment structure replaces the traditional method of adjusting by using counterweight plates, can quickly adjust the pile foundation load, and is easy to operate.

[0081] The seismic simulation platform monitoring device further comprises a floating structure arranged in the interior of the counterweight water tank 51, the floating structure comprising: a floating plate 61 slidingly arranged in the interior of the counterweight water tank 51, the side surface of the floating plate 61 and the inner surface of the counterweight water tank 51 being in close contact with each other; two guide rods 62, each fixed in the interior of the counterweight water tank 51, the floating plate 61 slidingly sleeved on the two guide rods 62;

[0082] The seismic simulation platform monitoring device further comprises a positioning structure arranged on the counterweight water tank 51, the positioning structure comprising: a fixed cylinder 71 fixed on the top surface of the counterweight water tank 51, the fixed cylinder 71 being arranged opposite to the through hole; a vertical rod 72 fixed on the top surface of the floating plate 61, the end of the vertical rod 72 away from the floating plate 61 penetrating through the through hole, the outer surface of the vertical rod 72 and the inner surface of the through hole being in close contact with each other, the interior of the vertical rod 72 being a hollow structure; two strip-shaped openings each arranged on the outer circumferential surface of the vertical rod 72, the two strip-shaped openings each being in communication with the interior of the vertical rod 72; two pressing plates 73 each slidingly arranged in the two strip-shaped openings; a plurality of springs 74 each arranged between the two pressing plates 73; a threaded rod 75 threadedly 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; a moving block 76 rotationally installed on the end of the threaded rod 75 located in the interior of the vertical rod 72, the moving block 76 being in the shape of a circular truncated cone, the top end of the moving block 76 being larger than the bottom end (inverted trapezoidal shape, the two sides being inclined surfaces), when the two pressing plates 73 are away from each other, the two pressing plates 73 can press the inner surface of the fixed cylinder 71, at this time, the pressure exerted by the two pressing plates 73 on the fixed cylinder 71 together fixes the vertical rod 72, when the vertical rod 72 is fixed, the floating plate 61 is also fixed, the design of the pressing structure can avoid the floating plate 61 from shaking during the seismic simulation test, thereby preventing the water flow in the interior of the counterweight water tank 51 from continuously surging, the purpose being to avoid the change of the center of gravity of the counterweight water tank 51 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 seismic simulation test;

[0083] The earthquake simulation platform monitoring device further comprises a clamping structure arranged on the bottom surface of the counterweight water tank 51, and the clamping structure comprises a clamping barrel 81 fixed on the bottom surface of the counterweight water tank 51, wherein the bottom end of the clamping barrel 81 is in an open structure; a plurality of mounting openings 82 are arranged on the outer circumferential surface of the clamping barrel 81; a plurality of clamping plates 83 are respectively arranged in the mounting openings 82 in a sliding mode, and each clamping plate 83 is provided with an inclined surface, and the plurality of clamping plates 83 are arranged in a circumferential array; a lifting ring 84 is sleeved on the clamping barrel 81 in a sliding mode, and the inner ring of the lifting ring 84 is in close contact with the outer circumferential surface of the clamping barrel 81; a sleeve ring 85 is fixedly sleeved on the lifting ring 84, and the bottom end of the sleeve ring 85 is larger than the top end in opening, and the lifting ring 84 can extrude the inclined surface of the plurality of clamping plates 83 when moving downward, so that the plurality of clamping plates 83 move synchronously and approach each other until the plurality of clamping plates 83 clamp the pile foundation together, at this time, the plurality of clamping plates 83 clamp the pile foundation together, and under the clamping action of the plurality of clamping plates 83, the counterweight water tank 51 is fixed on the top end of the pile foundation;

[0084] The earthquake simulation platform monitoring device further comprises a driving structure arranged on the bottom surface of the counterweight water tank 51, and the driving structure comprises a first fixed plate 91 fixed on the bottom surface of the counterweight water tank 51, two connecting rods 92 fixed on the side surfaces of the first fixed plate 91, a second fixed plate 93 fixed on the ends of the two connecting rods 92 away from the first fixed plate 91, a lead screw 94 rotatably arranged between the first fixed plate 91 and the second fixed plate 93, a moving plate 95 threadedly sleeved on the lead screw 94 and slidingly sleeved on the two connecting rods 92, and a top rod 96 fixed on the side surface of the moving plate 95 and arranged opposite to the sleeve ring 85;

[0085] The earthquake simulation platform monitoring device further comprises a rotating structure arranged on the bottom surface of the counterweight water tank 51, the rotating structure comprising: a rotating shaft 101 rotatably arranged on the side surface of the second fixed plate 93; a transmission gear 102 fixedly sleeved on the rotating shaft 101; a gear ring 103 sleeved on the clamping cylinder 81 and meshed with the transmission gear 102; a rotating cylinder 104 rotatably arranged on the clamping cylinder 81, and the gear ring 103 is fixedly sleeved on the rotating cylinder 104; a handle 105 fixed on the outer circumferential surface of the rotating cylinder 104; and two bevel gears 106, one of which is fixedly sleeved on the rotating shaft 101, and the other is fixedly sleeved on the lead screw 94, and the two bevel gears 106 are meshed with each other; when the rotating cylinder 104 rotates, the gear ring 103 thereon rotates and drives the transmission gear 102 to rotate; when the transmission gear 102 rotates, the rotating shaft 101 can be driven to rotate; the rotating shaft 101 drives the lead screw 94 to rotate through the two meshed bevel gears 106; under the limiting action of the two connecting rods 92, the moving plate 95 cannot rotate with the lead screw 94, so that when the lead screw 94 rotates, the moving plate 95 can be driven to move, so that the moving plate 95 drives the jack 96 to move; the jack 96 extrudes the outer surface of the sleeve ring 85 in the moving process; since the bottom end opening of the sleeve ring 85 is larger than the top end opening, the sleeve ring 85 can move downward when being extruded, and drives the lifting ring 84 to move downward.

[0086] The earthquake simulation platform monitoring device further comprises a locking structure arranged on the bottom surface of the counterweight water tank 51, the locking structure comprising: a toothed plate 111, the toothed plate 111 being provided with teeth matched with the transmission gear 102, and the toothed plate 111 being meshed with the transmission gear 102; a connecting rod 112 fixedly arranged on the toothed plate 111, the connecting rod 112 penetrating through the first fixed plate 91 and being slidably connected with the first fixed plate 91; a sleeve plate 113 fixedly sleeved on the connecting rod 112; a spring 114, one end of the spring 114 being connected with the first fixed plate 91 and the other end being connected with the sleeve plate 113; a rotating rod 115 rotatably arranged on the end of the connecting rod 112 away from the toothed plate 111; and a limiting rod 116 fixedly arranged on the outer circumferential surface of the rotating rod 115; a worker pulls the rotating rod 115, so that the rotating rod 115 drives the connecting rod 112 to move; the connecting rod 112 drives the toothed plate 111 to move when moving, until the toothed plate 111 is separated from the transmission gear 102; the transmission gear 102 can freely rotate without the limitation of the toothed plate 111.

[0087] The specific working principle of the application is as follows:

[0088] The earthquake simulation platform monitoring device for engineering structure provided by the application, in use, first, the staff fixes the pile foundation on the earthquake simulation platform 2, then the staff aims the clamping cylinder 81 at the pile foundation, controls the operation of the electric hoist 4, and makes the counterweight water tank 51 descend, so that the clamping cylinder 81 is lowered and is sleeved on the top end 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, the connecting rod 112 moves and drives the toothed plate 111 to move, until the toothed plate 111 is separated from the transmission gear 102, the transmission gear 102 can rotate freely in the absence of the restriction of the toothed plate 111, in addition, the rotating rod 115 also drives the limiting rod 116 to move when moving, when the toothed plate 111 is separated from the transmission gear 102, the limiting rod 116 can move out from below the counterweight water tank 51, at this time, the staff twists the rotating rod 115, so that the rotating rod 115 drives the limiting rod 116 to rotate, until the limiting rod 116 is rotated to the vertical state, further, the staff releases the rotating rod 115, the connecting rod 112 is reset under the elastic force of the spring two 114, the rotating rod 115 and the limiting rod 116 are also reset, the limiting rod 116 contacts the counterweight water tank 51 in the resetting process, at this time, the counterweight water tank 51 blocks the resetting of the limiting rod 116, so that the limiting rod 116 is pressed on the surface of the counterweight water tank 51, when the position of the limiting rod 116 is limited, the position of the toothed plate 111 is also limited, so that the toothed plate 111 is prevented from contacting the transmission gear 102;

[0089] After adjusting the position of the toothed plate 111, the staff rotates the handle rod 105, so that the handle rod 105 drives the rotating cylinder 104 to rotate, the gear ring 103 on the rotating cylinder 104 rotates and drives the transmission gear 102 to rotate when the rotating cylinder 104 rotates, the transmission gear 102 drives the rotating shaft 101 to rotate when the transmission gear 102 rotates, the rotating shaft 101 drives the lead screw 94 to rotate through the two intermeshing bevel gears 106, the moving plate 95 cannot rotate with the lead screw 94 under the limiting action of the two connecting rods 92, so that the lead screw 94 drives the moving plate 95 to move when the lead screw 94 rotates, the moving plate 95 drives the top rod 96 to move, the top rod 96 extrudes the outer surface of the sleeve ring 85 in the moving process, the sleeve ring 85 can move downward when being extruded, and drives the lifting ring 84 to move downward, the lifting ring 84 extrudes the inclined surfaces of the plurality of clamping plates 83 when moving downward, so that the plurality of clamping plates 83 move synchronously and approach each other, until the plurality of clamping plates 83 jointly clamp the pile foundation, at this time, the plurality of clamping plates 83 jointly clamp the pile foundation, the counterweight water tank 51 is fixed on the top end of the pile foundation under the clamping action of the plurality of clamping plates 83;

[0090] After the counterweight water tank 51 is fixed, the staff can use the earthquake simulation platform 2 to provide seismic simulation for the pile foundation. During the simulation process, the staff can adjust the load applied by the counterweight water tank 51 on the pile foundation by adjusting the amount of water 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 enter the inside of the counterweight water tank 51. With the entry of the water flow, the floating plate 61 will move upwards. The more water flow in the counterweight water tank 51, the greater the load applied by the counterweight water tank 51 on the pile foundation. This adjustment structure replaces the traditional adjustment method using counterweight pieces, which can quickly adjust the load of the pile foundation and is convenient to operate.

[0091] After the water adding operation is completed, the staff can use the pressing structure to fix the position of the floating plate 61. Specifically, the floating plate 61 moves the vertical rod 72, so that the vertical rod 72 extends from the counterweight water tank 51. After the water adding is completed, the staff rotates the knob at the top of the threaded rod 75, so that the threaded rod 75 rotates. When the threaded rod 75 rotates, the moving block 76 moves downward. The moving block 76 is in a circular truncated cone structure, and the top end of the moving block 76 is larger than the bottom end. Therefore, when the moving block 76 moves downward, it can press the two pressing plates 73, so that the two pressing plates 73 are away from each other. When the two pressing plates 73 are away from each other, the two pressing plates 73 can press the inner surface of the fixed cylinder 71. At this time, the pressure applied by the two pressing plates 73 on the fixed cylinder 71 together fixes the vertical rod 72. When the vertical rod 72 is fixed, the floating plate 61 is also fixed. The design of the pressing structure can avoid the shaking of the floating plate 61 during the earthquake simulation test, thereby preventing the water flow in the counterweight water tank 51 from constantly surging. The purpose is to avoid the change of the center of gravity of the counterweight water tank 51 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, improve the accuracy of the earthquake simulation test of the pile foundation, and is worthy of note. The earthquake simulation platform monitoring device for the pile foundation is prior art, and the data acquisition and analysis and control system and other control devices are obtained by using conventional means, which will not be described in detail here.

[0092] It should be noted that the above content only illustrates the technical idea of the present application and cannot limit the protection scope of the present application. For ordinary skilled persons in the technical field, they can make some improvements and refinements without departing from the principles of the present application. These improvements and refinements fall within the scope of the claims of the present application.

Claims

1. A seismic simulation platform monitoring device for an engineered structure, characterized by, The utility model relates to a seismic simulation platform, including: Base plate (1); Seismic simulation platform (2) is installed on the top surface of base plate (1); Mounting bracket (3) is fixed on base plate (1), and mounting bracket (3) is inverted U type structure; Electric hoist (4) is installed on the top of mounting bracket (3); Counterweight structure is arranged above seismic simulation platform (2), and the counterweight structure includes counterweight water tank (51), the top surface of counterweight water tank (51) is connected with four branch slings, the driving end of electric hoist (4) is connected with main sling, and the end of four branch slings away from counterweight water tank (51) is connected with main sling, and the top surface of counterweight water tank (51) is provided with through hole; Floating structure, including: Floating plate (61) is slidably arranged in the inside of counterweight water tank (51), and the side surface of floating plate (61) and the inner face of counterweight water tank (51) are mutually attached; Two guide rods (62) are fixed in the inside of counterweight water tank (51), and floating plate (61) is slidably sleeved on two guide rods (62); Positioning structure, including: Fixed cylinder (71) is fixed on the top surface of counterweight water tank (51), and fixed cylinder (71) is opposite through hole arrangement; Vertical rod (72) is fixed on the top surface of floating plate (61), and the end of vertical rod (72) away from floating plate (61) passes through through hole, and the outer surface of vertical rod (72) and the inner face of through hole are mutually attached, and the inside of vertical rod (72) is hollow structure; Two strip-shaped openings are all arranged on the outer circumferential surface of vertical rod (72), and two strip-shaped openings are all connected with the inside of vertical rod (72); Two pressing plates (73) are slidably arranged in two strip-shaped openings respectively; A plurality of spring (74) are arranged between two pressing plates (73); Threaded rod (75) is threadedly sleeved on the top end of vertical rod (72), and one end of threaded rod (75) extends into the inside of vertical rod (72); Moving block (76) is rotatably installed on the end of threaded rod (75) in the inside of vertical rod (72), and moving block (76) is circular truncated cone structure, and the top end of moving block (76) is larger than the bottom end; Still include clamping structure, drive structure, rotating structure, locking structure, all are arranged on the bottom surface of counterweight water tank (51).

2. A seismic platform monitoring device for an engineered structure according to claim 1, wherein, The counterweight structure further includes: Water supply tank (52) is fixed on the side surface of mounting bracket (3); Water pump (53) is installed on water supply tank (52), and the water inlet end of water pump (53) is connected with water supply tank (52), and the water outlet end of water pump (53) is connected with counterweight water tank (51).

3. A seismic platform monitoring device for engineered structures as claimed in claim 1, wherein, The clamping structure includes: Clamping cylinder (81) is fixed on the bottom surface of counterweight water tank (51), and the bottom end of clamping cylinder (81) is open structure; A plurality of mounting ports (82) are all arranged on the outer circumferential surface of clamping cylinder (81); A plurality of clamping plates (83) are slidably arranged in a plurality of mounting ports (82) respectively, and each clamping plate (83) is provided with inclined surface; A lifting ring (84) is sleeved on the clamping cylinder (81), and the inner ring of the lifting ring (84) is in close contact with the outer peripheral surface of the clamping cylinder (81); A sleeve ring (85) is fixedly sleeved on the lifting ring (84), and the bottom end opening of the sleeve ring (85) is larger than the top end opening.

4. A seismic platform monitoring device for an engineered structure according to claim 3, wherein, The driving structure comprises: A first fixed plate (91) is fixed to the bottom surface of the counterweight water tank (51); Two connecting rods (92) are fixed to the side surfaces of the first fixed plate (91); A second fixed plate (93) is fixed to the ends of the two connecting rods (92) away from the first fixed plate (91); A lead screw (94) is rotatably installed between the first fixed plate (91) and the second fixed plate (93); A moving plate (95) is threadedly sleeved on the lead screw (94), and the moving plate (95) is sleeved on the two connecting rods (92); A top rod (96) is fixed to the side surface of the moving plate (95), and the top rod (96) is opposite to the sleeve ring (85).

5. A seismic platform monitoring device for an engineered structure according to claim 4, wherein, The rotating structure comprises: A rotating shaft (101) is rotatably installed on the side surface of the second fixed plate (93); A transmission gear (102) is fixedly sleeved on the rotating shaft (101); A gear ring (103) is sleeved on the clamping cylinder (81) and is in meshing connection with the transmission gear (102); A rotating cylinder (104) is rotatably installed on the clamping cylinder (81), and the gear ring (103) is fixedly sleeved on the rotating cylinder (104); A handle rod (105) is fixed to the outer peripheral surface of the rotating cylinder (104); Two bevel gears (106) are fixedly sleeved on the rotating shaft (101) and the lead screw (94), and the two bevel gears (106) are in meshing connection.

6. A seismic platform monitoring device for an engineered structure according to claim 5, wherein, The locking structure comprises: A toothed plate (111) is provided with teeth matching the transmission gear (102), and the toothed plate (111) is in meshing connection with the transmission gear (102); A connecting rod (112) is fixed to the toothed plate (111), penetrates through the first fixed plate (91), and is in sliding connection with the first fixed plate (91); A sleeve plate (113) is fixedly sleeved on the connecting rod (112); A second spring (114) is connected at one end to the first fixed plate (91) and at the other end to the sleeve plate (113); A rotating rod (115) is rotatably installed at the end of the connecting rod (112) away from the toothed plate (111); A limiting rod (116) is fixed to the outer peripheral surface of the rotating rod (115).

7. A seismic platform monitoring device for an engineered structure according to claim 3, wherein, The clamping plates (83) are arranged in a circumferential array.

8. The seismic platform monitoring device for engineered structures of claim 1, wherein, An observation window is arranged on the side surface of the counterweight water tank (51).

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