CN113587978B - Earthquake-resistant and shear-resistant test simulation system and method for penetrating through fracture zone tunnel - Google Patents
Earthquake-resistant and shear-resistant test simulation system and method for penetrating through fracture zone tunnel Download PDFInfo
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- CN113587978B CN113587978B CN202110758990.5A CN202110758990A CN113587978B CN 113587978 B CN113587978 B CN 113587978B CN 202110758990 A CN202110758990 A CN 202110758990A CN 113587978 B CN113587978 B CN 113587978B
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Abstract
The invention provides a tunnel anti-seismic test system and method for simulating crossing of a fracture zone, which comprises the following steps: the device comprises a fault and tunnel simulation unit, a vibration unit, a lifting unit and a measurement acquisition unit; the fault and tunnel simulation unit comprises a first surrounding rock model, a tunnel model and a second surrounding rock model which are sequentially connected; the vibration unit is connected with the bottom of the first surrounding rock model and used for driving the first surrounding rock model to vibrate to realize simulated formation vibration; the lifting unit is connected with the bottom of the second surrounding rock model and is used for driving the second surrounding rock model to do uniform lifting motion so as to simulate stratum dislocation or creeping; the measurement acquisition unit comprises a detection sensor, and the detection sensor is arranged on one side of the tunnel model and is used for acquiring strain and vibration data of the tunnel model; the tunnel mechanical behavior of earthquake, fault dislocation and the coupling of the earthquake and the fault dislocation can be researched, and the earthquake and fault dislocation action and the structural failure mechanism can be fully disclosed.
Description
Technical Field
The disclosure relates to the technical field of tunnel seismic design, in particular to a system and a method for simulating seismic tests of crossing fault tunnels.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the development of economy and the increase of population mobility, the travel traffic demand of people is also increased sharply. In recent years, the construction of railways and highways throughout the country, sea and land, tunnel engineering has become increasingly important.
With the large-scale construction of tunnel engineering, no matter under the ground of a city or across mountains and over the sea, the tunnel position is often inevitable to cross a fracture zone, and how to reduce the earthquake action of the tunnel at a fault and the dislocation or creep influence of surrounding rocks becomes one of the major issues concerned by the tunnel boundary. The research on the structural damage and disaster reduction measures of the tunnel penetrating through the fracture zone under the coupling condition of the earthquake action and the fault influence has very important engineering significance, however, the current test system is difficult to meet the test of the tunnel mechanical behavior under the earthquake action, fault dislocation or creep and the coupling action of the earthquake action, the fault dislocation or creep and the coupling action of the earthquake action, and for the test, how to provide the test precision and the tunnel test suitable for the earthquake action, the fault dislocation or creep and the coupling action of the earthquake action, the fault dislocation or creep and the creep are the technical problems existing at present.
Disclosure of Invention
In order to solve the problems, the disclosure provides an earthquake-resistant and shear-resistant test simulation system and method for penetrating through a fracture zone tunnel, which can be used for researching tunnel mechanical behaviors, damage mechanisms and earthquake reduction and isolation measures of the tunnel under the action of earthquake, fault dislocation or creep and the coupling action of the earthquake action, the fault dislocation or creep.
In a first aspect, the present disclosure provides a tunnel seismic testing system for simulating crossing of a fracture zone, comprising: the device comprises a fault and tunnel simulation unit, a vibration unit, a lifting unit and a measurement acquisition unit; the fault and tunnel simulation unit comprises a first surrounding rock model, a tunnel model and a second surrounding rock model which are sequentially connected;
the vibration unit is connected with the bottom of the first surrounding rock model and used for driving the first surrounding rock model to vibrate to realize simulated formation vibration;
the lifting unit is connected with the bottom of the second surrounding rock model and is used for driving the second surrounding rock model to do uniform lifting motion so as to simulate stratum dislocation or creeping;
the measurement and acquisition unit comprises a detection sensor, and the detection sensor is arranged on one side of the tunnel model and used for acquiring strain and vibration data of the tunnel model.
In a second aspect, the present disclosure provides a testing method of a tunnel seismic testing system for simulating crossing of a fracture zone, comprising:
inputting earthquake input waves to the vibrating table through the vibration control system, and providing a vibration effect on the first surrounding rock model by the vibrating table to simulate the earthquake effect of bedrock;
transmitting a control signal to the shifter through the displacement control device, controlling the movement of the shifter to enable the shifter to rise at a constant speed, and simulating relative dislocation at a tunnel fault when an earthquake occurs;
strain and vibration data of the tunnel model are acquired through a detection sensor of the measurement acquisition unit, and the measured strain and vibration data are output in an image form through a data recording device.
Compared with the prior art, this disclosure possesses following beneficial effect:
1. the method is simple and effective in simulating earthquake action and fault dislocation and creep, provides a test system and a test method for future shield tunnel fault earthquake resistance research, and can promote the research on earthquake resistance, shear resistance and other prevention and control measures of crossing a fracture zone tunnel. The system is simple and easy to understand in structure, but the considered earthquake effect is complete: the main device of the anti-seismic system is only four parts, namely a fault and tunnel simulation unit, a stratum vibration simulation device between bedrock and surrounding rock model, a lifting unit and a measurement and acquisition unit, and the device is convenient to assemble and simple in operation steps during experiments; one part of the system simulates earthquake vibration, the other part simulates fault dislocation, tunnel mechanical behaviors in the coupling of the earthquake and the fault dislocation can be researched, and the earthquake and fault dislocation action and the structure failure mechanism are fully disclosed.
2. The test system disclosed by the invention is small in size, and the surrounding rock road model is made of light concrete materials, so that earthquakes of different seismic magnitudes can be simulated better by using the vibrating table. Among this disclosed tunnel device, the middle horizontal cylinder cavity can be changed different filling material and subtract shock insulation filling material, uses one set of device system, can simulate the contrast analysis all kinds of tunnel antidetonation and the shock insulation effect that subtracts of different materials.
Advantages of additional aspects of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of an earthquake and shear test simulation system for traversing a fracture zone tunnel according to the present disclosure;
FIG. 2 is a cross-sectional view of a seismic and shear test simulation system of the present disclosure traversing a fracture zone tunnel;
FIG. 3 is a schematic diagram of a strain sensor connection;
FIG. 4 is a schematic view of the connection of the vibration table and the displacer with the fault and the second surrounding rock model.
Wherein, 1, a first surrounding rock model; 2. a vibration unit; 3. a lifting unit; 4. a measurement acquisition unit; 5. a tunnel model; 6. shock absorption and isolation layers in fracture zone intervals; 7. a detection sensor; 8. a second surrounding rock model; 9. a filling layer; 10. an iron plate; 11. a vibration table; 12. a vibration control system; 13. a cooling system; 14. a shifter; 15. a displacement control device; 16. a data recording device; 17. an elastic pad; 18. a strain gauge; 19. soldering tin points; 20. a copper wire; 21. a panel; 22. anchoring the bolts; 23. and (4) bolts.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1, a tunnel seismic testing system for simulating crossing of a fracture zone comprises: the device comprises a fault and tunnel simulation unit, a vibration unit, a lifting unit and a measurement acquisition unit; the fault and tunnel simulation unit comprises a first surrounding rock model, a tunnel model and a second surrounding rock model which are sequentially connected;
the vibration unit is connected with the bottom of the first surrounding rock model and used for driving the first surrounding rock model to vibrate to realize simulated formation vibration;
the lifting unit is connected with the bottom of the second surrounding rock model and is used for driving the second surrounding rock model to do uniform lifting motion so as to simulate stratum fracture or creeping;
the measurement and acquisition unit comprises a detection sensor, and the detection sensor is arranged on one side of the tunnel model and used for acquiring strain and vibration data of the tunnel model.
As an implementation mode, the first surrounding rock model is of a rectangular structure, and a first round hole penetrating through two side faces is formed in the middle of the rectangular structure; the second surrounding rock model is of a rectangular structure, and a second round hole penetrating through the two side faces is formed in the middle of the rectangular structure; one end of the tunnel model is installed in the first round hole, and the other end of the tunnel model is installed in the second round hole. A set gap is arranged between the first surrounding rock model and the second surrounding rock model, a flexible lining structure adaptive to large deformation is arranged at the set gap, seismic isolation layers between fracture zone intervals are arranged on two sides of the flexible lining structure, the seismic isolation layers between the fracture zone intervals comprise seismic isolation materials, and the gap between the first surrounding rock model and the second surrounding rock model is filled with the seismic isolation materials.
Be equipped with first filling layer between first country rock model and the tunnel model, be equipped with the second filling layer between second country rock model and the tunnel model, have between first country rock model and the second country rock model and set for the clearance, set for the clearance both sides and set up the shock absorption and isolation layer between the fracture zone, the lateral surface at tunnel model is installed to the shock absorption and isolation layer. In the fault and tunnel simulation unit, in the middle transverse cylindrical cavity, various filling layers and shock absorption and isolation layers between fracture zones can be replaced at the cavity, so that a set of device system can achieve high efficiency effect on different shock absorption and isolation material test requirements under different surrounding rock conditions; in addition, by using the same equipment, after different filling layers are changed, only the seismic isolation layer between fracture zone sections is changed as a variable, other conditions are kept unchanged, and the seismic resistance and stress performance of each material can be effectively compared. Namely, the seismic isolation and reduction effect of seismic isolation and reduction layers among various fracture zone intervals can be simulated and compared by using one device system. The filling layer can be made of materials with different specifications and models, the seismic isolation and reduction layer can also be made of materials with different types, and the performances of different materials can be obtained through comparison experiments.
The mounting panel is installed to the bottom of rectangle structure, and the mounting panel is used for being connected the transmission vibration of being convenient for with the vibration unit. The mounting plate is an iron plate, a hole is reserved in an upper side panel (21) of the vibration table, and when the mounting plate is connected with a first surrounding rock model (1) of a fault and tunnel simulation unit, a bolt (23) penetrates into the hole from the lower side and is screwed into the iron plate (10) at the bottom of the first surrounding rock model. The connection mode of the shifter (14) and the fault and the second surrounding rock model (8) is the same as that of the first surrounding rock model, specifically, when the upper side panel of the shifter is provided with a hole and is connected with the fault and the second surrounding rock model of the tunnel simulation unit, a bolt penetrates into the hole from the lower side and is screwed into an iron plate at the bottom of the second surrounding rock model. The first surrounding rock model (1) and the second surrounding rock model (8) of the simulated rock-soil body are made of light concrete materials calculated through a similarity ratio, and the self weight of the whole system is greatly reduced. The weight reduction can be realized by utilizing the vibration table to better simulate the earthquakes with different magnitude, and the dynamic change of the shield tunnel fault when suffering the earthquakes is fully simulated and demonstrated.
As another embodiment, the vibratory unit includes a vibratory table, a vibration control system, and a cooling system. One side of the vibration control system is connected with the PC end, and the other side of the vibration control system is connected with the vibration table. During the experiment, the base rock seismic action is simulated through the vibrating table, and the vibration control system adjusts the vibration amplitude to simulate the vibration characteristics of the middle stratum, so that the surrounding rock and the tunnel model are subjected to real seismic response. The vibration table is used for providing vibration for the first surrounding rock model to simulate a bedrock earthquake. Specifically, the stratum vibration simulation device (2) selects a vibration table as simulation equipment. During the experiment, the base rock earthquake action is simulated through the vibrating table, the amplitude is adjusted through the vibration control system, and therefore the vibration characteristic of the middle stratum is simulated, the first surrounding rock model (1) is enabled to be subjected to real earthquake response, and the relative displacement difference of the surrounding rocks on the left side and the right side can be met. During the experiment, the base rock seismic action is simulated through the vibrating table, and the vibration control system adjusts the vibration amplitude to simulate the vibration characteristics of the middle stratum, so that the first surrounding rock model (1) and the tunnel model (5) are subjected to real seismic response. The vibration unit is a stratum vibration simulation device between the bedrock and the surrounding rock model. The bottom of the vibration unit is provided with the elastic cushion, so that the vibration caused by the upper side vibration table can be reduced, and the noise pollution to the surrounding environment is effectively prevented.
The lifting unit comprises a shifter (14) and a displacement control device (15), the shifter is used for providing lifting motion, the displacement control device is used for transmitting a control signal to the shifter to control the shifter to do uniform lifting motion, the lifting unit can be an automatic hydraulic jack, and the top end of the hydraulic jack is connected with the second surrounding rock model (8); the shifter is enabled to rise at a constant speed during the experiment, the relative dislocation at the tunnel fault position is simulated when the earthquake occurs, and the stability of the whole experiment is ensured. The lifting unit is a dislocation or creeping simulation device. The bottom of the lifting unit is provided with an elastic cushion, so that noise pollution to the surrounding environment is effectively prevented.
The measuring and collecting unit comprises a detecting sensor and a data recording device, the detecting sensor is divided into a strain sensor and an acceleration sensor which are respectively used for measuring the strain and the vibration of a test piece, a plurality of strain sensors are uniformly distributed at each section of the tunnel model in the circumferential direction, and a plurality of displacement sensors are arranged on the inner side surface of the tunnel model. Specifically, the two ends of the tunnel model, the center of the first surrounding rock model, the center of the second surrounding rock model, the two ends of the fracture zone and the center of the fracture zone are selected by the measuring and collecting unit, seven sections are used as monitoring objects, annular and longitudinal strain sensors are pasted on the inner side and the outer side of each section at intervals of 90 degrees along the circumference, four displacement sensors are arranged on the inner side of the tunnel and used for recording the stress and the deformation of the tunnel, and finally the measured stress and the measured deformation are output in an image form through the data recording device, so that the excellent comparison of the seismic mitigation and isolation performance of each protective material is displayed more clearly.
The strain sensor is formed by welding a strain gauge and a copper wire by using welding tin, the strain gauge is adhered to a measuring point, the other side of the copper wire is connected with a data recording device by a half-bridge method, and strain at each measuring point can be measured by resistance transformation during testing; the displacement sensor may be directly connected to the data recording device.
The tunnel earthquake-proof test system for simulating the crossing of the fracture zone is mainly divided into a left part and a right part, a fault and tunnel simulation unit is arranged on the upper side of the left half part, the fault and tunnel simulation unit is composed of a cuboid first surrounding rock model (1) with a cylindrical cavity in the middle, a rectangular second surrounding rock model (8) and a tunnel model (5), and a stratum vibration simulation device between bedrock and the first surrounding rock model is arranged below the left half part and composed of a vibration table (11), a vibration control system (12) and a cooling system (13). The vibration control system inputs seismic waveforms to the vibrating table, and the cooling system is installed on the stratum vibration simulation device between the whole bedrock and the first surrounding rock model and used for cooling the device. During the experiment, the vibration table is used for simulating the earthquake action of the bedrock, and the vibration control system is used for adjusting the amplitude to simulate the vibration characteristics of the middle stratum, so that the first surrounding rock model (1) and the tunnel model (5) are subjected to real earthquake response. The upper side of the right half part is provided with a second surrounding rock model (8), the lower part of the right half part is provided with a lifting unit which consists of a shifter (14) and a displacement control device (15), the shifter is enabled to rise at a constant speed during an experiment, and relative dislocation at a tunnel fault position is simulated when an earthquake occurs. One part of the system simulates earthquake vibration, the other part simulates fault dislocation, tunnel mechanical behaviors in the coupling of the earthquake, the fault dislocation and the earthquake and the fault dislocation can be researched, and the earthquake and fault dislocation action and the structure damage mechanism are fully demonstrated.
In the middle transverse cylindrical cavity, the cavities can be replaced with various filling layer materials and shock absorption and isolation layers among fracture zones, and the high-efficiency effect that one set of device system can meet different shock absorption and isolation material testing requirements under different surrounding rock conditions is achieved. In addition, by using the same equipment, after different filling layers are changed, only the seismic isolation layer between fracture zone sections is changed as a variable, other conditions are kept unchanged, and the seismic resistance and stress performance of each material can be effectively compared. Namely, the seismic isolation and reduction effect of seismic isolation and reduction layers among various fracture zone intervals can be simulated and compared by using one device system.
Example 2
The embodiment also provides an anti-seismic and anti-shear test method for penetrating a fracture zone tunnel, which comprises the following steps:
inputting earthquake input waves to a vibrating table of the vibrating unit through a vibration control system, and providing a vibration effect on the first surrounding rock model by the vibrating table to simulate a bedrock earthquake effect;
transmitting a control signal to the shifter through the displacement control device, controlling the movement of the shifter to enable the shifter to rise at a constant speed, and simulating relative dislocation at a tunnel fault when an earthquake occurs;
strain and vibration data of the tunnel model are acquired through a detection sensor of the measurement acquisition unit, and the measured strain and vibration data are output in an image form through a data recording device.
Specifically, (1) manufacturing a wood template of the surrounding rock model, placing an iron plate with an anchor in the length and width directions of the template, and pouring a lightweight concrete material into the template to obtain the surrounding rock model with the iron plate at the bottom for connecting with a stratum vibration simulation device between bedrock and the surrounding rock model.
(2) And placing a tunnel model in the surrounding rock model, wherein the tunnel model is fixed at two ends of the surrounding rock model.
(3) And fixing the tunnel model by using different materials as filling layers on the outer side of the tunnel model.
(4) A set gap is formed between the first surrounding rock model and the second surrounding rock model, a flexible lining structure suitable for large deformation is arranged at the set gap, and shock absorption and isolation layers between fracture zone sections are arranged on two sides of the flexible lining structure.
(5) One side of the vibration control system is connected with the PC end, and the other side of the vibration control system is connected with a vibration table of the vibration unit; the cooling system is an air cooling system, is connected with the vibration table and directly radiates the heat of high-temperature parts in the vibration table into the atmosphere to cool the equipment. During the experiment, the base rock seismic action is simulated through the vibrating table, and the vibration control system adjusts the vibration amplitude to simulate the vibration characteristics of the middle stratum, so that the surrounding rock and the tunnel model are subjected to real seismic response.
(6) The displacement control device is connected with the displacer and used for controlling the movement of the displacer to enable the displacer to rise at a constant speed and simulate the relative dislocation at the tunnel fault position when an earthquake occurs.
(7) And (4) reserving holes on the upper side panel of the vibration table, and when the vibration table is connected with a fault and a first surrounding rock model of the tunnel simulation unit, penetrating bolts into the holes from the lower side and screwing the bolts into iron plates at the bottom of the surrounding rock model. The connection mode of the shifter, the fault and the second surrounding rock model is the same as that of the shifter.
(8) Selecting two ends of a tunnel model, the centers of left and right surrounding rocks and two ends and centers of a fracture zone, taking seven sections as monitoring objects, pasting annular and longitudinal strain sensors on the inner side and the outer side of each section at intervals of 90 degrees along the circumference, respectively arranging four displacement sensors on the upper side, the lower side, the left side and the right side on the inner side of the tunnel, recording the stress and the deformation of the tunnel, and finally outputting the measured stress and deformation in an image form through a data recording device.
(9) The strain sensor is formed by welding a strain gauge and a copper wire by using welding tin, the strain gauge is adhered to a measuring point, the other side of the copper wire is connected with a data recording device by a half-bridge method, and strain at each measuring point can be measured by resistance transformation during testing; the displacement sensor may be directly connected to the data recording device.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (9)
1. A tunnel seismic testing system for simulating crossing of a fracture zone, comprising: the device comprises a fault and tunnel simulation unit, a vibration unit, a lifting unit and a measurement acquisition unit; the fault and tunnel simulation unit comprises a first surrounding rock model, a tunnel model and a second surrounding rock model which are sequentially connected; a first filling layer is arranged between the first surrounding rock model and the tunnel model, a second filling layer is arranged between the second surrounding rock model and the tunnel model, a set gap is formed between the first surrounding rock model and the second surrounding rock model, a flexible lining structure adaptive to large deformation is arranged at the set gap, shock absorption and isolation layers of a fracture zone section are arranged at the set gap and at the two sides of the set gap, and the shock absorption and isolation layers are arranged on the outer side surface of the tunnel model; the seismic isolation and reduction layer is used for realizing performance comparison tests of seismic isolation and reduction layers made of different materials under the condition of not changing the filling layer by replacing different materials;
the vibration unit is connected with the bottom of the first surrounding rock model and used for driving the first surrounding rock model to vibrate to realize simulated formation vibration;
the lifting unit is connected with the bottom of the second surrounding rock model and is used for driving the second surrounding rock model to do uniform lifting motion so as to simulate stratum dislocation or creeping;
the measurement and acquisition unit comprises a detection sensor, and the detection sensor is arranged on one side of the tunnel model and used for acquiring strain and vibration data of the tunnel model.
2. A tunnel seismic testing system for simulating the crossing of a fracture zone as claimed in claim 1, wherein the first surrounding rock model is a rectangular structure, and a first round hole penetrating through two side faces is formed in the middle of the rectangular structure; the second surrounding rock model is of a rectangular structure, and a second round hole penetrating through the two side faces is formed in the middle of the rectangular structure; one end of the tunnel model is arranged in the first round hole, and the other end of the tunnel model is arranged in the second round hole.
3. A tunnel seismic testing system for simulating the crossing of a fracture zone as claimed in claim 1, wherein the first and second wall rock models are constructed from self-made lightweight concrete materials calculated from a similarity ratio.
4. A tunnel seismic testing system for simulating the crossing of a fracture zone as claimed in claim 1, wherein the lifting unit comprises a shifter and a displacement control device, the shifter is used for providing lifting movement, and the position control device is used for transmitting a control signal to the shifter to control the shifter to do uniform lifting movement.
5. A tunnel seismic testing system for simulating the crossing of a fracture zone as claimed in claim 4 wherein the vibration unit includes a vibration table, a vibration control system and a cooling system, the vibration control system transmitting seismic waveforms to the vibration table, the vibration table being adapted to provide vibrations to the first surrounding rock model to simulate a bedrock earthquake, the cooling system being adapted to cool equipment by dissipating heat from high temperature components of the vibration table directly into the atmosphere.
6. A tunnel earthquake-proof test system for simulating the crossing of a fracture zone as claimed in claim 1, wherein a stress measurement and acquisition unit is arranged between the inner wall of the cavity of the fault and tunnel simulation unit and the tunnel model, and the measurement and acquisition unit is used for selecting two ends of the tunnel model, the center of the first surrounding rock model, the center of the second surrounding rock model, two ends of the fracture zone and the center of the fracture zone as monitoring objects to acquire detection data.
7. A tunnel seismic testing system for simulating the crossing of a fracture zone as claimed in claim 6, wherein circumferential and longitudinal strain sensors are affixed to the inside and outside of each fracture surface at 90 ° intervals along the circumference, and four displacement sensors, i.e. upper, lower, left and right, are respectively provided on the inside of the tunnel for recording the stress and deformation of the tunnel; and outputting the measured stress and deformation in an image form through a data recording device, and displaying the comparison of the seismic isolation and reduction performance between the vibration isolation layers made of different materials.
8. A tunnel seismic testing system for simulating the crossing of a fracture zone as claimed in claim 1, wherein elastic pads are placed on the bottom surfaces of the vibration unit and the lifting unit, and the elastic pads are used for absorbing the vibration caused by the vibration unit.
9. A method of testing a seismic tunnel test system which simulates a cross fracture zone according to claim 5, comprising:
inputting earthquake input waves into the vibrating table through a vibration control system, and providing a vibration effect on the first surrounding rock model by the vibrating table to simulate a bedrock earthquake effect;
transmitting a control signal to the shifter through the displacement control device, controlling the movement of the shifter to enable the shifter to rise at a constant speed, and simulating relative dislocation at a tunnel fault when an earthquake occurs;
strain and vibration data of the tunnel model are acquired through a detection sensor of the measurement acquisition unit, and the measured strain and vibration data are output in an image form through a data recording device.
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