System for testing building vibration caused by underground vehicle load

Abstract

The invention provides a system for testing building vibration caused by underground vehicle load, and relates to the technical field of underground vibration research. Comprising a test box in which a tunnel model is arranged; the tunnel model comprises two crossed tunnels, guide rails are arranged in the tunnels, and a bottom plate is slidably connected to the guide rails; a plurality of mounting columns are arranged on the bottom plate at intervals, force hammers are arranged on the mounting columns, and a base plate is arranged below the force hammers; the bottom plate is connected with a traction mechanism; the device further comprises a controller, an acceleration sensor is arranged in the test box, and the acceleration sensor is electrically connected with the controller. Compared with the prior art, the device is simple in structure, low in cost and easy to obtain, coupling vibration test data of complex systems such as lines, tunnels, soil bodies and buildings caused by driving in the tunnels at different intersection angles can be obtained, and the scientific research requirements of complex coupling system vibration are met.

Description

Technical Field

[0001] The invention relates to the technical field of underground vibration research, and in particular to a building vibration test system caused by underground vehicle load. Background Art

[0002] As urban land resources become increasingly scarce, underground transportation lines account for an increasing proportion and are closer to buildings, and the adverse effects of vehicle vibration on the normal use of buildings are becoming more and more prominent. Studying the vibration of buildings caused by underground traffic loads is an important means to ensure the normal use of buildings along the underground transportation lines when vehicles are running.

[0003] The use of scaled model test systems and simulation methods is an effective method to study the vibration of buildings caused by underground traffic loads. However, existing research tests generally simplify train loads into concentrated loads directly applied to tunnels, without considering the coupled vibration of complex systems such as trains and tracks, and it is difficult to consider the time and space superposition effect of moving loads, and it is difficult to obtain more accurate test data. It is impossible to finely study the vibration mechanism of the coupled system of lines, tunnels, soil and buildings, and it is difficult to meet the scientific research needs of complex coupled system vibration.

[0004] Therefore, there is an urgent need for a building vibration test system caused by underground vehicle loads to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a building vibration test system caused by underground vehicle loads, which has a simple structure and is easy to obtain at low cost, and can obtain coupled vibration test data of complex systems such as lines, tunnels, soil, and buildings, thereby meeting the scientific research needs of complex coupled system vibrations.

[0006] The embodiment of the present invention is achieved as follows:

[0007] An embodiment of the present application provides a building vibration test system caused by underground vehicle loads, which includes a test box with a tunnel model arranged in the test box; the tunnel model includes two cross-arranged tunnels, guide rails are arranged in the tunnels, and a bottom plate is slidably connected to the guide rails; a plurality of mounting columns are arranged at intervals on the bottom plate, a force hammer is arranged on the mounting columns, and a base plate is arranged below the force hammer; a traction mechanism is arranged in connection with the bottom plate; and a controller is also included, an acceleration sensor is arranged in the test box, and the acceleration sensor is electrically connected to the controller.

[0008] In some embodiments of the present invention, the traction device includes a drive motor and a traction rope, the drive motor is connected to the base plate via the traction rope, and the drive motor is electrically connected to the controller.

[0009] In some embodiments of the present invention, limit sensors are provided at both ends of the guide rail, and the limit sensors are electrically connected to the controller.

[0010] In some embodiments of the present invention, four of the above-mentioned mounting columns are arranged at intervals.

[0011] In some embodiments of the present invention, the tunnel comprises a PEC tube, and the guide rail is fixedly arranged on the inner side of the PEC tube.

[0012] In some embodiments of the present invention, a plastic foam board is provided inside the test box, and the test box is filled with artificially mixed soil.

[0013] In some embodiments of the present invention, an upper opening group and a lower opening group are provided on the side of the above-mentioned test box, and the upper opening group and the lower opening group are staggered up and down; the upper opening group includes two symmetrically arranged upper openings, and two horizontal slide grooves are provided on the inner side of the test box, and the two horizontal slide grooves are arranged on the upper and lower sides of the upper openings; the horizontal slide groove is slidably connected with an upper movable plate, and an upper through port is provided on the upper movable plate.

[0014] In some embodiments of the present invention, the above-mentioned lower opening group includes two symmetrically arranged lower openings, and two vertical slide grooves are arranged on the inner side of the test box, and the two vertical slide grooves are arranged on the left and right sides of the lower opening; the horizontal slide groove is slidably connected with a lower movable plate, and a lower through port is arranged on the lower movable plate.

[0015] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0016] Existing research tests generally simplify the vehicle load to a concentrated load directly applied to the tunnel, and it is difficult to obtain more accurate test data. It is not possible to finely study the vibration mechanism of the tunnel, soil and building coupling system, and it is difficult to meet the scientific research needs of complex coupling system vibration. The present invention provides a building vibration test system caused by underground vehicle loads, which includes a test box, a tunnel model is arranged in the test box; the tunnel model includes two cross-arranged tunnels, a guide rail is arranged in the tunnel, and a bottom plate is slidably connected to the guide rail; a plurality of mounting columns are arranged at intervals on the bottom plate, a force hammer is arranged on the mounting column, and a base plate is arranged below the force hammer; a traction mechanism is arranged on the bottom plate; and a controller is also included, an acceleration sensor is arranged in the test box, and the acceleration sensor is electrically connected to the controller.

[0017] The materials required by the invention are simple and easy to obtain, and the model box is not large in size, which is suitable for indoor testing; by setting a guide rail in the tunnel and setting a powerful hammer on the mounting column; the bottom plate is connected with a traction mechanism, which can simulate different mobile vibration loads measured by actual working conditions or calculated by simulation; it can be used to simulate the impact of the vibration of underground traffic running in cross tunnels on buildings, and is suitable for the study of driving vibration under complex working conditions. At the same time, by simplifying the underground traffic model into a movable force hammer with a fixed spacing of four mounting columns, and controlling the speed of the traction rope towing the pillar to run along the tunnel direction, a convenient and reliable test platform is provided for studying the impact of driving vibration of underground lines on soil and buildings along the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a cross-sectional view of a tunnel according to an embodiment of the present invention;

[0020] Figure 2 It is a front view of an embodiment of the present invention;

[0021] Figure 3 is a side view of a bottom plate according to an embodiment of the present invention;

[0022] Figure 4 It is a top cross-sectional view of a test box according to an embodiment of the present invention;

[0023] Figure 5 This is a front view of a guide rail frame according to an embodiment of the present invention;

[0024] Figure 6 It is a front view of the guide rail limiting frame according to an embodiment of the present invention.

[0025] Icons: 1. Test chamber; 2. Tunnel; 3. Guide rail; 4. Bottom plate; 5. Mounting column; 6. Hammer; 7. Upper movable plate; 8. Lower movable plate; 9. Upper opening; 10. Lower opening; 11. Upper through-hole; 12. Lower through-hole; 13. Base plate; 14. Base; 15. Support frame; 16. Guide rail limit frame; 17. Through hole; 18. Limit piece. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example:

[0029] Please refer to Figure 1-4 , this embodiment provides that the existing research tests generally simplify the train load into a concentrated load directly applied to the tunnel 2, and it is difficult to obtain more accurate test data, and it is not possible to finely study the vibration mechanism of the tunnel 2 coupling system, and it is difficult to meet the scientific research needs of the complex coupling system vibration. The present invention provides a building vibration test system caused by underground vehicle loads, which includes a test box 1, and a tunnel 2 model is arranged in the test box 1; the tunnel 2 model includes two cross-arranged tunnels 2, and a guide rail 3 is arranged in the tunnel 2, and a bottom plate 4 is slidably connected to the guide rail 3; a plurality of mounting columns 5 are arranged on the bottom plate 4 at intervals, and a hammer 6 is arranged on the mounting column 5, and a base plate 13 is arranged below the hammer 6; a traction mechanism is connected to the bottom plate 4; and a controller is also included, and an acceleration sensor is arranged in the test box 1, and the acceleration sensor is electrically connected to the controller.

[0030] The materials required by the present invention are simple and easy to obtain, and the size of the model box is not large, which is suitable for indoor experiments; by setting a guide rail 3 in the tunnel 2, a hammer 6 is set on the mounting column 5; the bottom plate 4 is connected with a traction mechanism, which can simulate different moving vibration loads, which are measured from actual working conditions or calculated by simulation; it can be used to simulate the impact of the vibration of underground traffic running at the same time in the cross tunnel 2 on the building, and is suitable for the study of driving vibration in complex working conditions. At the same time, by simplifying the underground traffic model into a movable hammer 6 with a fixed spacing by four mounting columns 5, the speed is controlled by the traction rope towing the pillar to run along the direction of the tunnel 2, and the hammer 6 acts on the base plate 13, providing a convenient and reliable test platform for studying the impact of driving vibration on the buildings around the tunnel 2. The acceleration sensor uses a laser acceleration sensor. This high-precision sensor can more clearly measure the acceleration changes of the surrounding soil and buildings.

[0031] In some embodiments of the present invention, the traction device includes a driving motor and a traction rope, the driving motor is connected to the bottom plate 4 through the traction rope, and the driving motor is electrically connected to the controller. Four mounting posts 5 are arranged at intervals. The movable hammer 6 with fixed spacing of the four mounting posts 5 runs along the direction of the tunnel 2 at a speed controlled by the traction rope traction support, which can accurately simulate the vibration mechanism of the coupling system of the tunnel 2 and meet the scientific research needs of the vibration of the complex coupling system.

[0032] In some embodiments of the present invention, both ends of the guide rail 3 are provided with limit sensors, which are electrically connected to the controller. The limit sensors are connected to the controller via a data line, and after the limit sensors sense that the underground traffic model has passed, they control the movement of the model to ensure that the start / end position of the underground traffic model is the same each time.

[0033] In some embodiments of the present invention, the tunnel 2 includes a PEC tube, and the guide rail 3 is fixedly arranged on the inner side of the PEC tube. The guide rail 3 is a hardwood board used to simulate the actual driving route. The hardwood board and the PEC tube are fixed by punching holes with fixing bolts, so that the PEC tube and the hardwood board are fixed to form an integral tunnel 2. The specific punching method of the PEC tube and the hardwood board is as follows: a long bolt is used to punch and fix the middle of the pipe, and the same technology is used to insert transverse screws at the places where the pipe contacts the hardwood board on both sides. The model of the tunnel 2 is reduced according to the actual size, with a ratio of 1:30 (relevant professionals can also adjust the model size according to different laboratory conditions with reference to the content of the present invention), the PEC tube 5 has a diameter of 30cm, a thickness of 1.5cm, and a total length of 1.1m, and the hardwood board 7 in the tunnel 2 has a total length of 0.9m and a thickness of 2cm.

[0034] In some embodiments of the present invention, a plastic foam board is provided on the inner side of the test box 1, and the test box 1 is filled with artificially proportioned soil. The test personnel take soil from the vicinity of the construction site of the tunnel 2, dry the soil sample, crush the soil blocks and screen them according to the required particle grading. According to the density required by the test, the filling is carried out in layers, and the filling thickness varies according to the different burial depths of the tunnel 2. According to the on-site soil samples, soil bodies of different properties are buried. The model box is 3m high, and the covering heights of this test are 1m, 1.1m, and 1.2m respectively. The corresponding burial depths of the tunnel 2 are prepared to be 0.5m, 0.55m, and 0.6m respectively. The arrangement and arrangement of sensors are different for different burial depths. According to the density required by the test, the filling is carried out in layers, and the filling thickness varies according to the different burial depths of the tunnel 2.

[0035] In some embodiments of the present invention, the side of the test box 1 is provided with an upper opening group and a lower opening group, and the upper opening group and the lower opening group are arranged in an upper and lower dislocation; the upper opening group includes two symmetrically arranged upper openings 9, and the inner side of the test box 1 is provided with two horizontal slides, and the two horizontal slides are arranged on the upper and lower sides of the upper opening 9; the horizontal slide is slidably connected with an upper movable plate 7, and the upper movable plate 7 is provided with an upper opening 11. The lower opening group includes two symmetrically arranged lower openings 10, and the inner side of the test box 1 is provided with two vertical slides, and the two vertical slides are arranged on the left and right sides of the lower opening 10; the horizontal slide is slidably connected with a lower movable plate 8, and the lower movable plate 8 is provided with a lower opening 12. By providing an upper movable plate 7 that can be moved left and right and a lower movable plate 8 that can be moved up and down, the tunnel 2 passing through the upper opening 11 and the lower opening 12 can be precisely controlled, so that the test personnel can adjust the intersection angle and spacing of the two tunnels 2 to obtain more accurate experimental data. It can be understood that a scale line can be set on the outside of the test box 1 to facilitate the precise adjustment of the position of the tunnel 2.

[0036] Please refer to Figure 5-6 A guide rail frame is arranged outside the test box 1, and the guide rail frame includes two bases 14. A support frame 15 is arranged on the base 14 to support the two ends of the guide rail 3, and the height of the support frame 15 can be adjusted. It also includes a guide rail limit frame 16, and the shape of the guide rail limit frame 16 is adapted to the shape of the tunnel 2; a through hole 17 adapted to the shape of the guide rail 3 is arranged in the guide rail limit frame 16. The staff can install the guide rail limit frame 16 at both ends of the tunnel 2, pass the guide rail 3 through the through hole 17 to limit it to ensure that it is in the center of the tunnel 2; then the staff adjusts the base 14 and the support frame 15 to support the guide rail 3, and finally disassembles the guide rail limit frame 16 to complete the preparation work. The guide rail limit frame 16 can be composed of two detachably connected limit members 18.

[0037] In summary, the embodiment of the present invention provides a building vibration test system caused by underground vehicle load, which includes a test box 1, in which a tunnel 2 model is arranged; the tunnel 2 model includes two cross-arranged tunnels 2, in which a guide rail 3 is arranged, and a bottom plate 4 is slidably connected to the guide rail 3; a plurality of mounting columns 5 are arranged at intervals on the bottom plate 4, a powerful hammer 6 is arranged on the mounting column 5, and a base plate 13 is arranged below the powerful hammer 6; a traction mechanism is connected to the bottom plate 4; and a controller is also included, and an acceleration sensor is arranged in the test box 1, and the acceleration sensor is electrically connected to the controller. The materials required by the present invention are simple and easy to obtain, and the size of the model box is not large, which is suitable for indoor testing; by setting the guide rail 3 in the tunnel 2, and the powerful hammer 6 is arranged on the mounting column 5; the bottom plate 4 is connected to the traction mechanism, different mobile vibration loads can be simulated, which are measured by actual working conditions or calculated by simulation; it can be used to simulate the influence of the vibration of underground traffic running simultaneously in the cross tunnel 2 on the building, and is suitable for the study of the influence of driving vibration under complex working conditions. At the same time, by simplifying the underground traffic model into a movable hammer 6 with a fixed spacing of four mounting columns 5, and controlling the speed of the hammer 6 to run along the direction of the tunnel 2 by towing the support with a traction rope, a convenient and reliable test platform is provided for studying the impact of vehicle vibration on the tunnel 2 and surrounding buildings. This device performs scaled simulation according to actual conditions and sets up a cross tunnel 2 model, which can be widely used in scientific research on the dynamic response of urban soft soil tunnel 2 engineering. Relying on the disciplinary advantages and test platform, scientific research and engineering personnel can fully conduct systematic research on the vibration environment response of underground traffic operations, explore the vibration deformation mechanism of the tunnel 2 structure and surrounding buildings, and use it to guide engineering practice, improve the safety of underground line travel, and optimize the construction of underground traffic lines.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A building vibration test system caused by underground vehicle load, characterized in that: It includes a test box, in which a tunnel model is arranged; the tunnel model includes two cross-arranged tunnels, in which a guide rail is arranged, and a bottom plate is slidably connected to the guide rail; a plurality of mounting columns are arranged at intervals on the bottom plate, a force hammer is arranged on the mounting columns, and a base plate is arranged below the force hammer; a traction mechanism is connected to the bottom plate; and it also includes a controller, in which an acceleration sensor is arranged in the test box, and the acceleration sensor is electrically connected to the controller.

2. The building vibration test system caused by underground vehicle load according to claim 1, characterized in that: The traction device includes a driving motor and a traction rope, the driving motor is connected to the base plate via the traction rope, and the driving motor is electrically connected to the controller.

3. The building vibration test system caused by underground vehicle load according to claim 2, characterized in that: Limit sensors are arranged at both ends of the guide rail, and the limit sensors are electrically connected to the controller.

4. The building vibration test system caused by underground vehicle load according to claim 1, characterized in that: The four mounting posts are arranged at intervals.

5. The building vibration test system caused by underground vehicle load according to claim 4, characterized in that: The tunnel comprises a PEC tube, and the guide rail is fixedly arranged inside the PEC tube.

6. The building vibration test system caused by underground vehicle load according to claim 5, characterized in that: A plastic foam board is arranged inside the test box, and the test box is filled with artificially mixed soil.

7. The building vibration test system caused by underground vehicle load according to claim 1, characterized in that: An upper opening group and a lower opening group are arranged on the side of the test box, and the upper opening group and the lower opening group are arranged in an offset manner up and down; the upper opening group includes two symmetrically arranged upper openings, and two horizontal slide grooves are arranged on the inner side of the test box, and the two horizontal slide grooves are arranged on the upper and lower sides of the upper opening; the horizontal slide groove is slidably connected with an upper movable plate, and the upper movable plate is provided with an upper through port.

8. The building vibration test system caused by underground vehicle load according to claim 7, characterized in that: The lower opening group includes two symmetrically arranged lower openings, two vertical slide grooves are arranged on the inner side of the test box, and the two vertical slide grooves are arranged on the left and right sides of the lower opening; the horizontal slide groove is slidably connected with a lower movable plate, and a lower through port is arranged on the lower movable plate.

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