CN108535128B - Simulation device for seismic effect of fractured rock mass - Google Patents
Simulation device for seismic effect of fractured rock mass Download PDFInfo
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- CN108535128B CN108535128B CN201810209770.5A CN201810209770A CN108535128B CN 108535128 B CN108535128 B CN 108535128B CN 201810209770 A CN201810209770 A CN 201810209770A CN 108535128 B CN108535128 B CN 108535128B
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- sample
- fractured rock
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- rock mass
- sample tray
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a seismic effect simulation device for fractured rock masses, which comprises an experimental device and a control center, wherein the experimental device comprises a hydraulic device, a patch, a hydraulic damper, a sample tray, a horizontal clamping groove, a telescopic rod, a rotating disc, a hinge joint, a motor, a supporting rod, a baffle and a base, the control center controls the parameters of the experimental device through data lines so that the effect of seismic waves with different periods and amplitudes on the fractured rock masses can be simulated, the effect of the fractured rock masses under the action of different positive stresses and different amplitude frequencies can be obtained through simulation, and finally, the deformation, the strength characteristics and the internal fracture characteristics and the development conditions of the fractured rock masses after an earthquake occurs are obtained.
Description
Technical Field
The invention relates to a geological disaster simulation device for fractured rock masses, in particular to a simulation device for seismic effect of fractured rock masses.
Background
In recent years, earthquakes frequently occur in China, lives and properties of people are continuously threatened, people always care about damage and influence of earthquakes on buildings and the like, the main reason why the earthquakes have the greatest influence on the lives and properties of people is from various secondary disasters such as collapse, landslide, ground subsidence and the like induced by the earthquakes, and the important importance of research on the secondary disasters induced by the earthquakes is the influence of the earthquakes on the physical and mechanical properties of strata and fractured rock masses and the change characteristics of the internal structures of the fractured rock masses in the process of the earthquakes.
As is well known, seismic waves can be divided into longitudinal waves, transverse waves and surface waves, wherein the transverse waves have the largest damage and influence on fractured rock masses in strata, so that the condition of the action of the transverse waves on the fractured rock masses in the earthquake needs to be simulated, namely, the test of the fractured rock masses under the action of reciprocating shear force is simulated.
Disclosure of Invention
The invention aims to provide a simulation device for the seismic effect of a fractured rock mass, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a simulation device for seismic effect of fractured rock mass comprises a total of two parts, namely an experiment device and a control center, wherein the experiment device consists of a hydraulic device, a patch, a hydraulic damper, a sample tray, a horizontal clamping groove, a telescopic rod, a rotating disc, a hinged part, a motor, a support rod, a baffle plate and a base, the control center is connected to the experiment device through a data line so as to control the size of each parameter of the experiment device in the experiment process, the patch is in extrusion contact with the upper part of the hydraulic device, the lower part of the sample tray is connected with the horizontal clamping groove, the horizontal clamping groove is connected with the telescopic rod, the telescopic rod is connected with the rotating disc through the hinged part, the motor is connected with the rotating disc, the hydraulic dampers are arranged on the left side and the right side of the sample tray, the support rods have four angular points which are distributed in a square, the hydraulic device is connected with the base through the supporting rods, the baffle is arranged in the middle of the two supporting rods on any one side, and the baffle is welded with the hydraulic damper at the corresponding position.
As a further scheme of the invention: the hydraulic device enables the fractured rock mass sample to be subjected to vertical normal stress action by extruding the patch, and the hydraulic device can be arranged to apply normal stress to the fractured rock mass sample in the operation process and transmit data to the control center for recording.
As a still further scheme of the invention: the surface of the patch contacting with the hydraulic device is lubricated, and the surface contacting with the fractured rock mass sample needs to have a high friction coefficient so as to ensure that the patch can perform reciprocating motion similar to simple harmonic vibration along with the fractured rock mass in the horizontal direction.
As a still further scheme of the invention: the sample tray and the patch are respectively provided with a displacement sensor and a stress sensor for monitoring the change conditions of the volume, the surface and the stress of the rock-soil body sample in the stress process.
As a still further scheme of the invention: bear the weight of the crack rock mass sample above the sample tray, be connected to the draw-in groove with the level below the sample tray, and the level is connected to draw-in groove and telescopic link, the telescopic link is connected and confirms that the telescopic link direction is perpendicular through articulated elements and rotation disc, provide the turning force via the motor, and ensure that the slew velocity of two rotation discs is the same, make the telescopic link can be circular motion along with the rotation disc, the level has played the motion of restriction sample tray in the vertical direction to the draw-in groove, make the sample can only carry out the reciprocating motion of horizontal direction.
As a still further scheme of the invention: the hydraulic damper has a certain adjustable damping coefficient K, can provide certain elasticity when being compressed, and is arranged on the left and the right of the sample tray, because the sample tray can only move in the horizontal direction, and the amplitude Delta L of the reciprocating motion of the sample tray is equivalent in the moving process, the pressure F can be obtained according to the formula: f ═ Δ L × K; so that the extreme force to which the rock mass sample is subjected during movement is certain and controllable.
As a still further scheme of the invention: the data lines are approximately three and are respectively connected with the two hydraulic dampers, the hydraulic device and the motor, the data lines connecting the two hydraulic dampers and the hydraulic device can respectively adjust the damping coefficient K of the hydraulic dampers through the control center, namely the amplitude of the simple harmonic force applied to the fractured rock mass sample, control the positive stress applied to the fractured rock mass by the hydraulic device and the deformation data of the fractured rock mass received at the position and record the positive stress and the deformation data, and the data lines connecting the motor can control the horsepower of the motor through the control center so as to control the frequency of the simple harmonic force applied to the fractured rock mass sample.
Compared with the prior art, the invention has the beneficial effects that: the fractured rock sample is subjected to the action of simple harmonic shearing force to simulate the strength, the volume and the internal fracture development change condition of the fractured rock under the action of seismic waves; the understanding of the earthquake action is strengthened, and the deformation properties of various rocks under the earthquake action are known and distinguished, so that a reasonable engineering suggestion is provided for the earthquake-resistant engineering.
Drawings
Fig. 1 is a schematic structural diagram of a simulation device for seismic effect of a fractured rock mass.
Fig. 2 is a schematic structural diagram of a top view of a simulation device for seismic effect of a fractured rock mass.
Fig. 3 is a schematic structural diagram of a horizontal clamping groove in a simulation device for the seismic effect of a fractured rock mass.
In the figure: 1. the device comprises a hydraulic device, 2, a patch, 3, a hydraulic damper, 4, a sample tray, 5, a horizontal clamping groove, 6, a telescopic rod, 7, a rotating disc, 8, a hinge piece, 9, a motor, 10, a supporting rod, 11, a baffle, 12, a base, 13, a data line, 14 and a control center.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in the embodiment of the present invention, an earthquake effect simulation device for fractured rock masses includes an experimental device and a control center 14, the experimental device is composed of a hydraulic device 1, a patch 2, a hydraulic damper 3, a sample tray 4, a horizontal clamping groove 5, a telescopic rod 6, a rotating disc 7, a hinge 8, a motor 9, a support rod 10, a baffle 11 and a base 12, the control center 14 is connected to the experimental device through a data line to control the size of each parameter of the experimental device during the experiment, the patch 2 is in extrusion contact with the upper side of the hydraulic device 1, the lower side of the sample tray 4 is connected to the horizontal clamping groove 5, the horizontal clamping groove 5 is connected to the telescopic rod 6, the telescopic rod 6 is connected to the rotating disc 7 through the hinge 8, the motor 9 is connected to the rotating disc 7, the hydraulic damper 3 is disposed on the left and right of the sample tray 4, the bracing piece 10 has four altogether and is the angular point position distribution of square, hydraulic means 1 is connected with base 12 through bracing piece 10, hydraulic means 1 and base 12 are being connected respectively through the both ends of every bracing piece 10, it keeps a whole at the test process at whole laboratory glassware to ensure, baffle 11 sets up the intermediate position at two bracing pieces 10 of arbitrary one side, and weld with hydraulic damper 3 in the corresponding position of baffle 11 mutually, provide the counter-force for hydraulic damper 3, and ensured that hydraulic damper 3's position keeps fixed.
The hydraulic device 1 enables the fractured rock mass sample to be subjected to vertical normal stress action by extruding the patch 2, and the hydraulic device 1 can be arranged to apply normal stress on the fractured rock mass sample in the operation process and transmit data to the control center for recording.
The surface of the patch 2 contacting with the hydraulic device 1 is lubricated, so that the relative sliding of the hydraulic device 1 in the test process can be ensured, and the surface contacting with the fractured rock mass sample needs to have a high friction coefficient so as to ensure that the fractured rock mass performs reciprocating motion similar to simple harmonic vibration in the horizontal direction.
The sample tray 4 and the patch 2 are provided with a displacement sensor and a stress sensor for monitoring the change conditions of the volume, the surface and the stress of the rock-soil body sample in the stress process.
Bear the weight of the crack rock mass sample above the sample tray 4, be connected to draw-in groove 5 with the level below the sample tray 4, and the level is connected to draw-in groove 5 and telescopic link 6, telescopic link 6 is connected and is perpendicular with 6 directions of telescopic link through articulated elements 8 and rotating disc 7, motor 9 is connecting two rotating disc 7, and it is the same to guarantee the slew rate of two rotating disc 7, telescopic link 6 passes through articulated elements 8 and connects on rotating disc 7, can rotate along with rotating disc 7, because the level can only carry out the reciprocating motion of horizontal direction to the top of draw-in groove 5 effect messenger telescopic link 6, guarantee promptly that sample tray 4 can only carry out the reciprocating motion of horizontal direction.
The inner rod and the outer rod of the telescopic rod 6 have excellent sliding performance, and the materials are wear-resistant high-strength materials.
The hydraulic damper 3 has a certain adjustable damping coefficient K, can provide certain elasticity when receiving the compression, has all set up hydraulic damper 3 about sample tray 4, because sample tray 4 can only carry out the motion of horizontal direction, and the amplitude about its reciprocating motion is equivalent in the in-process of motion moreover, and the pressure F that receives can be according to the formula: f ═ Δ L × K; so that the extreme force to which the rock mass sample is subjected during movement is certain and controllable.
The supporting rods 10 are totally four angular point positions which are squares, the two ends of each supporting rod 10 are respectively connected with the hydraulic device 1 and the base 12, so that the whole experimental instrument is ensured to be kept in the test process, the supporting rods 10 are made of alloy steel with good tensile property, the hydraulic devices 1 are connected through the upper ends of the supporting rods 10, and the bases 12 are connected at the lower ends of the supporting rods, so that the device is more stable in the experiment.
The baffle 11 is arranged at the middle position of the two support rods 10, and is welded with the hydraulic damper 3 at the corresponding position of the baffle 11, so that the baffle provides a counter force for the hydraulic damper 3 and ensures that the position of the hydraulic damper 3 is kept fixed.
The data lines 13 are roughly three, the data lines 13 are respectively connected with the two hydraulic dampers 3, the hydraulic device 1 and the motor 9, the damping coefficient K of the hydraulic dampers 3, namely the amplitude of the simple harmonic force applied to the fractured rock mass sample, can be adjusted by the control center 14 through the data lines 13 connecting the two hydraulic dampers 3 and the hydraulic device 1, the horsepower of the motor 9 can be controlled through the control center 14 so as to control the frequency of the simple harmonic force applied to the fractured rock mass sample, the control center 14 can ensure that the frequency of the rock mass sample in the process of simple harmonic operation is kept at a constant speed or can be operated in an expected speed change rule by controlling the rotating speed of the motor 9, and the data lines 13 have three parts, one part is connected with the hydraulic device 1 and is used for controlling the magnitude of the positive stress applied to the fractured rock mass by the hydraulic device 1 and receiving and recording the deformation data of the fractured rock mass at the position, one part is connected with the hydraulic damper 3 and used for controlling the damping coefficient, and the other part is connected with the motor 9 and used for controlling the rotating speed of the motor 9, so that the fractured rock mass sample is acted by simple harmonic force in fixed or variable frequency.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (1)
1. A simulation device for seismic effect of fractured rock mass comprises an experimental device and a control center, and is characterized in that the experimental device consists of a hydraulic device, a patch, a hydraulic damper, a sample tray, a horizontal clamping groove, a telescopic rod, a rotating disc, a hinge piece, a motor, a support rod, a baffle and a base; the fractured rock sample is borne on the sample tray, the hydraulic device is arranged above the sample tray, the patch is in extrusion contact with the lower part of the hydraulic device and is in contact with the sample in the sample tray, and the hydraulic device enables the fractured rock sample to be subjected to vertical positive stress action by extruding the patch; the lower surface of the sample tray is connected with a horizontal clamping groove, the horizontal clamping groove is connected with a telescopic rod, the telescopic rod is connected with the rotating disks through a hinge piece and is arranged along the vertical direction, the motor is connected with the rotating disks, the rotating power is provided through the motor, the rotating speeds of the two rotating disks are ensured to be the same, the telescopic rod can do circular motion along with the rotating disks, the horizontal clamping groove limits the motion of the sample tray in the vertical direction, and the sample can only do reciprocating motion in the horizontal direction;
the hydraulic dampers are arranged on the left and right sides of the sample tray, the supporting rods are totally four and distributed in the angular point positions of a square shape, the hydraulic device is connected with the base through the supporting rods, baffles are arranged in the middle of the two supporting rods on the left and right sides, and the corresponding positions of the baffles are welded with the hydraulic dampers;
the hydraulic damper has a certain adjustable damping coefficient K, can provide certain elasticity when being compressed, and because the sample tray can only move in the horizontal direction, and the amplitude Delta L of the reciprocating motion of the sample tray is equivalent in the moving process, the pressure F can be obtained according to a formula: f ═ Δ L × K, so that the extreme force exerted on the rock mass sample during movement is constant and controllable;
the surface of the patch, which is in contact with the hydraulic device, is lubricated, and the surface of the patch, which is in contact with a fractured rock mass sample, has a high friction coefficient so as to ensure that the patch performs reciprocating motion similar to simple harmonic vibration along with the fractured rock mass in the horizontal direction;
displacement sensors and stress sensors are arranged in the sample tray and the patch and used for monitoring the change conditions of the volume, the surface and the stress of the rock-soil body sample in the stress process;
the control center is connected to the experimental device through data lines, the number of the data lines is three, the data lines are respectively connected with the two hydraulic dampers, the hydraulic device and the motor, the data lines connected with the two hydraulic dampers can adjust the damping coefficient K of the hydraulic dampers through the control center, namely the amplitude of the simple harmonic force applied to the fractured rock mass sample, the data lines connected with the hydraulic device can control the magnitude of the normal stress applied to the fractured rock mass by the hydraulic device through the control center, receive and record the deformation data of the fractured rock mass at the position, and the data lines connected with the motor can control the horsepower of the motor through the control center so as to control the frequency of the simple harmonic force applied to the fractured rock mass sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209770.5A CN108535128B (en) | 2018-03-14 | 2018-03-14 | Simulation device for seismic effect of fractured rock mass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209770.5A CN108535128B (en) | 2018-03-14 | 2018-03-14 | Simulation device for seismic effect of fractured rock mass |
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| Publication Number | Publication Date |
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| CN108535128A CN108535128A (en) | 2018-09-14 |
| CN108535128B true CN108535128B (en) | 2020-04-21 |
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| CN110186635A (en) * | 2019-06-26 | 2019-08-30 | 中国水利水电科学研究院 | A kind of adjustable centrifuge test model box for vibrating table of dynamic characteristics |
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| CN104749055B (en) * | 2015-01-22 | 2017-10-27 | 同济大学 | Realize the experimental rig of vertical circulation compression side rocking shearing power loading |
| CN105973722B (en) * | 2016-07-26 | 2017-03-15 | 山东科技大学 | The constant normal stiffness shearing test device of rock discontinuum and its test method |
| CN207908288U (en) * | 2018-03-14 | 2018-09-25 | 吉林大学 | A kind of simulator of earthquake sheet for crack rock |
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