CN110512664A - Hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforces soil-slope dynamic model device and test method - Google Patents
Hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforces soil-slope dynamic model device and test method Download PDFInfo
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
Abstract
The invention discloses a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope to reinforce soil-slope dynamic model device and test method, shear model box is placed on the centrifuge Hanging Basket of geotechnical centrifuge, data acquisition channel increases device and is equipped with multiple data line interfaces, each data line interface is connected by shielding line with corresponding strain type data acquisition channel, each data line interface connects corresponding shielding line interface by multiple converted channels respectively, the opening and closing of each converted channel are controlled by radio station, and all shielding line interfaces are connected by shielding line with corresponding strain transducer；The slope surface of cut slope model is provided with hinge type Combining Support of Frame Beams of Prestressed Anchor Rope, is connected between crossbeam and stringer by articulated element, in shear model box, all articulated elements pass through prestress anchorage cable and are fixedly connected with anchor cable fixed beam anchor cable fixed beam inner support.The present invention can simulate the flexible support of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing side slope, prestress application, overcome the problems, such as data acquisition channel limited amount.
Description
Technical field
The invention belongs to Geotechnical Engineering fields, are related to a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing soil-slope power mould
Type device and test method.
Background technique
China is multiple one of the country of geological disaster, loss and people caused by the geological disasters such as annual landslide, avalanche
Member injures and deaths be it is very big, under geological process more very.Soil-slope landslide is that wherein incidence is highest, especially red clay, swollen
The Subgrade soils such as swollen soil occur mainly in the ground such as Hunan, Guizhou, Yunnan.For such side slope, Prestress anchoring cable-beam is mesh
It is preceding to use a kind of relatively more extensive slope supporting structure；Currently, structure generally uses armored concrete to pour, because it is rigid
Property structure, rainfall causes the supporting soil body to generate moderate finite deformation, generates expansive force, and destructible can not achieve Vierendeel girder flexible support
The characteristics of, therefore propose hinge type Combining Support of Frame Beams of Prestressed Anchor Rope and reinforce soil-slope.In order to further appreciate that the structural strengthening soil-slope
The mechanism of action, Analysis of Slope Stability, Failure Mechanism the foundation of science is provided, it is necessary to the dynamic characteristics of side slope after reinforcing with
And response pattern carries out in-depth study.
The dynamic model test of Prestress anchoring cable-beam reinforcing side slope is for examining the supporting construction mechanical property
Important means, and the ess-strain that conventional indoor dynamic model test cannot simulate prototype is horizontal.Dynamic Centrifugal Model Test
Leiomyoma cells or alternative materials must be placed in by the test model that certain prototype pantograph ratio ruler is made by fast turn-around
Centrifuge generate the high speed centrifugation field of force in, by improve model self weight body force, make stress state level locating for model with
Prototype is identical, then inputs corresponding seismologic parameter to shake table, to make model that deformation and failure similar with prototype be presented
Process.
Currently, used model casing can be flexible die molding box, rigid mould molding box and layer in dynamic model test
The shear model box of shape.Than in rigidity and flexible die molding box, shearing model casing can simulate the semo-infinite soil body in geological process
Under shearing effect and boundary condition, be the key that such comprehensive Centrifugal vibration test obtains efficiency test data.Shear model
Case is as a kind of knockdown model casing, effect in high speed centrifugation field, does not allow generally to carry out external modifications to model casing.In
In the stretching process of anchor cable, the soil body is first protruded into one end of anchor cable and is fixed, for being provided with the dynamic model test of basement rock, anchor
Rope fixed section is arranged in basement rock；And for soil-slope, it is difficult to which fixed anchor cable brings difficulty to the application of prestressd anchor cable.
For centrifuge as a kind of apparatus for carrying out dynamic model test, data acquisition can be carried out by inherently having
System, but its can be used for dynamic test data acquisition number of channels it is limited (32 groups of voltage channel, 16 groups of current channel,
16 groups of strained channel), when needed in test number of sensors to be tested be more than centrifuge on corresponding data acquisition channel quantity
When, very big difficulty is brought to data collection task.Existing solution is as follows: (1) straight by existing data acquisition device
Connect increase；The increased expense in channel is 1.2 ten thousand yuan/channel, and it was half a year to 1 year that producer, which purchases with installation time, increases by 96
Channel expense is 115.2 ten thousand yuan.In addition, when carrying out model test using existing centrifuge, without suitable position for installing
Increased data acquisition device need to remove the original acquisition system of centrifuge, plan acquisition channel again, to initially matching for centrifuge
It is adjusted again, it is complicated for operation, it is at high cost.(2) high-frequency with data storage function now acquires equipment；The equipment need with
Shear model box moves together, and installation requirement is high；Under centrifugal field and simulation earthquake conditions, it is difficult to guarantee its normal work；If
Test data is not collected, there is the risk that can not be remedied；In addition, also needing to adopt in on-test front opening using the equipment
Collection equipment is acquired, and off-test centrifuge comes to a complete stop, and could terminate acquisition after ensuring safety, and invalid data amount is very more.
(3) high-frequency acquisition (5KHz) and radio transmitting device；It is at high cost such as the DH5921 wireless acquisition module in 4 channels of eastern China's test,
It needs to be acquired data using the data collection system of peripheral hardware, it is difficult to guarantee the integrality of data and stablize transmission.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing soil-slope dynamic model dress
It sets, flexible support, the prestress application of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing side slope can be simulated, overcome data acquisition channel quantity
Limited problem, Accurate Determining hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing side slope deformation stress under centrifugal field and simulation earthquake conditions are special
Sign and side slope Dynamic response provide the foundation of science for the stability analysis etc. that assembling frame beam reinforces soil-slope, solve
Problem of the existing technology.
It is another object of the invention to provide a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope to reinforce soil-slope dynamic model device
Test method.
The technical scheme adopted by the invention is that a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforces soil-slope dynamic model dress
It sets, including shear model box, geotechnical centrifuge, data collection system；Cut slope model has been filled in the shear model box,
Shear model box is placed on the centrifuge Hanging Basket of geotechnical centrifuge, and data collection system includes that data acquisition channel increases device,
Data acquisition channel increases device and is equipped with multiple data line interfaces, and each data line interface passes through shielding line and corresponding strain
The connection of type data acquisition channel, each data line interface connect corresponding shielding line interface by multiple converted channels respectively, often
The opening and closing of a converted channel are controlled by radio station；All shielding line interfaces pass through shielding line and corresponding strain transducer
Connection；The slope surface of the cut slope model is provided with hinge type Combining Support of Frame Beams of Prestressed Anchor Rope, and hinge type Combining Support of Frame Beams of Prestressed Anchor Rope includes multiple cross
Beam, stringer and articulated element, crossbeam and stringer are mutually perpendicular to, and are connected between crossbeam and stringer by articulated element, the cutting
Anchor cable fixed beam that is horizontal positioned and being parallel to slope surface is equipped with inside side slope model, anchor cable fixed beam inner support is in shear model box
Interior, all articulated elements pass through prestress anchorage cable and are fixedly connected with anchor cable fixed beam.
Further, the both ends of each crossbeam or stringer are equipped with L-type connecting pin, the L-type of each crossbeam or stringer
Connecting pin is respectively active end and tight end, and the articulated section of each articulated element is equipped with L-type connecting pin, the L-type connection of articulated element
End is equipped with active end and tight end, and the active end of crossbeam, stringer or articulated element is equipped with through-hole, crossbeam, stringer or articulated element it is tight
End is equipped with threaded hole, and the aperture of threaded hole is less than the aperture of through-hole, the active end and articulated element of each crossbeam or stringer it is tight
End is connected by self-tapping screw, and the tight end of each crossbeam or stringer is connect with the active end of articulated element by self-tapping screw；Crossbeam,
The nearly slope surface end of stringer is set as arc surface.
Further, the both ends of the anchor cable fixed beam are threaded the first contrary threaded hole, the first screw thread
Hexagon-headed bolt is installed respectively in hole, anchor cable fixed beam by two hexagon-headed bolt inner supports in shear model box, prestressing force
One end of anchor cable is anchored in anchor cable fixed beam, and the other end of prestress anchorage cable is pierced by the center of articulated element, prestress application
It is fixedly connected afterwards with articulated element.
Further, the center of the articulated element is equipped with the second threaded hole, is equipped in outer-hexagonal in the second threaded hole
Empty bolt, prestress anchorage cable use stainless steel steel strand wires, and the outer cover of stainless steel steel strand wires is equipped with inner wall and smears having for lubricant
Machine glass tube, multiple apertures are uniformly provided in anchor cable fixed beam, and stainless steel steel strand wires one end passes through aperture and fixed by anchor cable
Ring is fixedly connected with anchor cable fixed beam, and the stainless steel steel strand wires other end is pierced by outer-hexagonal hollow bolt, after prestress application with it is outer
Hexagonal hollow bolt is fixedly connected.
Further, the correspondence measuring point of the cut slope model is equipped with acceleration transducer, displacement sensor, axle power and passes
Sensor, dynamic soil pressure sensor, geotechnical centrifuge centrifuge data acquisition panel on be additionally provided with voltage-type data acquisition channel,
Current mode data acquisition channel, voltage-type data acquisition channel are connect with voltage sensor, current mode data acquisition channel with
Amperometric sensor connection.
Further, the fixed depth of beam of the anchor cable is corresponding with every thickness degree of shear model box, and is less than adjacent
Two prestress anchorage cable vertical ranges, the width and height of anchor cable fixed beam are equal.
Further, the anchor cable fixed beam rotates one week, hexagon-headed bolt along anchor cable fixed beam axial movement away from
From with the bud of hexagon-headed bolt away from identical.
Further, the crossbeam, stringer or articulated element are all made of wide 10.7mm, the aluminium sheet of high 6mm is made.
A kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforces the test method of soil-slope dynamic model device, using above-mentioned hinge type
Combining Support of Frame Beams of Prestressed Anchor Rope reinforces soil-slope dynamic model device, specifically follows the steps below:
S1 is based on the theory of similarity, determines the likelihood ratio, determine geometric dimension, the side slope material, geotechnical centrifuge of side slope model
Maximum test acceleration；
S2, the placement in layers cut slope model in shear model box；When cut slope fills predeterminated position, bury
Corresponding sensor；When cut slope fills the pre-buried position of prestress anchorage cable, the rear side wall away from cut slope suitably away from
The groove for digging and being parallel to slope surface is left, anchor cable fixed beam is placed in groove, inner support is between the cabinet of shear model box, in advance
Stress anchor cable one end is connect with anchor cable fixed beam, and the other end of prestress anchorage cable stretches out slope surface；
S3 installs hinge type Combining Support of Frame Beams of Prestressed Anchor Rope, reinforcing side slope；Prestress anchorage cable passes through the center of articulated element, by pre-
One end that stress bringing device stretches out articulated element to prestress anchorage cable applies prestressing force, then by prestress anchorage cable and hinged structure
Part is fixedly connected；
S4 weighs the shear model box to complete, calculates counterweight, shear model box is hung to the centrifugation of geotechnical centrifuge
On machine Hanging Basket, video camera is installed, opens photography software, the case where in checkout facility room, it is ensured that after safety, opens centrifugation machine monitoring
Equipment, data acquisition equipment；
S5 inputs earthquake load, acquires dynamic test data.
Further, in the S2, the width of groove is the length of the cross section diagonal of anchor cable fixed beam, the depth of groove
Degree is distance of the anchor cable fixed beam bottom to small hole center, is uniformly provided with multiple apertures in anchor cable fixed beam, the position of aperture with
Prestress anchorage cable corresponds, and the center elevation of aperture and the articulated element center of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope are consistent.
The beneficial effects of the present invention are:
1, the flexible support of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing side slope can be simulated；Hinge type Combining Support of Frame Beams of Prestressed Anchor Rope includes multiple
Crossbeam, stringer and articulated element, crossbeam and stringer are mutually perpendicular to, and are connected between crossbeam and stringer by articulated element, Neng Goushi
The dilatancy for answering the soil body realizes the flexible support feature of Combining Support of Frame Beams of Prestressed Anchor Rope, can be good at simulating prototype hinge type anchor cable frame
It sets a roof beam in place and reinforces the stress and strain level of soil-slope, to power of the grasp assembling frame beam reinforcing side slope under geological process
Response pattern provides theoretical foundation.
2, the prestress application of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing side slope can be simulated；Water is equipped with inside cut slope model
Placing flat and the anchor cable fixed beam for being parallel to slope surface, for anchor cable fixed beam inner support in shear model box, all articulated elements are logical
It crosses prestress anchorage cable to be fixedly connected with anchor cable fixed beam, reduces the tensioning difficulty of prestress anchorage cable, and under the action of seismic wave,
Anchor cable fixed beam compatible deformation together with shear model box body frame can be good at simulating the semo-infinite soil body under geological process
Shearing effect and boundary condition.
3, the present invention is based on the existing data collection systems of centrifuge, increase device to strain type using data acquisition channel
Data acquisition channel is expanded, and data acquisition is accurate, and data transmission stablizes, is reliable, is guaranteed data storage, is prevented data from losing
It loses, it is at low cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the positive elevational view of inner support anchoring section of the invention.
Fig. 2 is the side elevation view of inner support anchoring section.
Fig. 3 is the structural schematic diagram of inner support anchoring section.
Fig. 4 is the structural schematic diagram of with gemel assembling frame beam mould.
Fig. 5 is the structural schematic diagram for forming the component of with gemel assembling frame beam mould.
Fig. 6 is the structural schematic diagram of the hinge of assembling frame beam mould.
Fig. 7 is the structural schematic diagram of with gemel assembling frame beam mould flexible support.
Fig. 8 is the structural schematic diagram that data acquisition channel increases device.
Fig. 9 is the El-Centro seismic waveform figure that Centrifugal vibration platform inputs in the embodiment of the present invention.
Figure 10 is the Taft waveform diagram that Centrifugal vibration platform inputs in the embodiment of the present invention.
In figure, 1. anchor cable fixed beams, 2. first threaded holes, 3. hexagon-headed bolts, 4. cabinets, 5. apertures, 6. hinge type anchors
Rope Vierendeel girder, 7. second threaded holes, 8. prestress anchorage cables, side wall after 9., 10. heads, 11. ends, 12. anchor cable fixed rings, 13.
Self-tapping screw, 14. arc surfaces, 15. centrifuge data acquire panel, and 16. data acquisition channels increase device, and 17. data lines connect
Mouthful, 18. shielding line interfaces, 19. crossbeams, 20. stringers.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Hinge type Combining Support of Frame Beams of Prestressed Anchor Rope of the present invention reinforces soil-slope dynamic model device, including shear model box, Tu Gongli
Scheming, data collection system；Filled cut slope model in shear model box, shear model box be placed in geotechnical centrifuge from
On scheming Hanging Basket, corresponding sensor is mounted at the measuring point of cut slope model, all the sensors pass through shielding line and number
It is connected according to acquisition system.
As shown in figs. 4-7, the slope surface of cut slope model is provided with hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6, hinge type anchored frame
Beam 6 includes multiple crossbeams 19, stringer 20 and articulated element, and crossbeam 19 and stringer 20 are mutually perpendicular to, between crossbeam 19 and stringer 20
It is connected by articulated element, the both ends of each crossbeam 19 or stringer 20 are equipped with L-type connecting pin, each crossbeam 19 or stringer 20
L-type connecting pin is respectively active end and tight end, and the articulated section of each articulated element is equipped with L-type connecting pin, and the L-type of articulated element connects
It connects end and is equipped with active end and tight end, the active end of crossbeam 19, stringer 20 or articulated element is equipped with through-hole, crossbeam 19, stringer 20 or hinge
The tight end of connection member is equipped with threaded hole, and the aperture of threaded hole is less than the aperture of through-hole, the active end of each crossbeam 19 or stringer 20
It is connect with the tight end of articulated element by self-tapping screw 13, the tight end of each crossbeam 19 or stringer 20 and the active end of articulated element are logical
Cross the connection of self-tapping screw 13；Crossbeam 19, stringer 20 nearly slope surface end be set as arc surface 14.
It is fixedly connected as shown in Figure 1-3, all articulated elements pass through prestress anchorage cable 8 with anchor cable fixed beam 1, anchor cable is solid
Determine beam 1 to be placed horizontally inside cut slope model and be parallel to slope surface, the both ends inner support of anchor cable fixed beam 1 is in shear model box
It is interior.Prestress anchorage cable 8 is simulated using the stainless steel steel strand wires (pulling force that can carry 1kN) of diameter 1mm, outside stainless steel steel strand wires
Portion is arranged with the lucite tube that inner wall smears lubricant, the internal diameter 3mm of lucite tube；One end of stainless steel steel strand wires passes through
Anchor cable fixed ring 12 is fixedly connected with anchor cable fixed beam 1, and the other end of stainless steel steel strand wires is stretched out from articulated element center；It is organic
The effect of glass tube avoids stainless steel steel strand wires from generating excessive positional shift under the action of the upper attached soil body, and guarantees simultaneously
The length of stainless steel steel strand wires free segment, makes it easy to tensioning, can also prevent corrosion of the soil body to stainless steel steel strand wires.
The both ends of anchor cable fixed beam 1 are threaded the first contrary threaded hole 2, pacify respectively in the first threaded hole 2
Fill hexagon-headed bolt 3, anchor cable fixed beam 1 by two 3 inner supports of hexagon-headed bolt in shear model box, in anchor cable fixed beam 1
Multiple apertures 5 are uniformly provided with, the stainless steel steel strand wires other end passes through aperture 5 and by anchor cable fixed ring 12 and anchor cable fixed beam 1
It is fixedly connected.If the both ends of anchor cable fixed beam 1 are protruded into the corresponding limit hole of cabinet 4 and are clamped, shear model box is influenced
Secondary use, it is accurate that limit hole site is not easy to determine, and shear model box can be made to generate excessive change when installation anchor cable fixed beam 1
Shape influences reusing for model casing.Therefore 1 the first threaded hole of both ends 2 of anchor cable fixed beam of the present invention, hexagon-headed bolt 3
Setting, it is easy to operate, anchor cable fixed beam 1 can be installed according to the articulated element position of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6
Any position in shear model box, and shear model box will not be damaged, reduce experimentation cost.
As shown in figure 8, the centrifuge data acquisition panel 15 of geotechnical centrifuge is equipped with voltage-type data acquisition channel, electricity
Flow pattern data acquisition channel and strain type data acquisition channel, voltage-type data acquisition channel are connect with voltage sensor,
Current mode data acquisition channel is connect with amperometric sensor；Data collection system includes that data acquisition channel increases device 16,
Data acquisition channel increase device 16 be equipped with multiple data line interfaces 17, each data line interface 17 by shielding line with it is corresponding
The connection of strain type data acquisition channel, each data line interface 17 passes through the corresponding shielding line of multiple converted channels connection respectively
Interface 18, the opening and closing of each converted channel are controlled by radio station；All shielding line interfaces 18 by shielding line with
Corresponding strain transducer connection.
Hinge type Combining Support of Frame Beams of Prestressed Anchor Rope of the present invention reinforces the test method of soil-slope dynamic model device, specifically according to following
Step carries out:
S1 is based on the theory of similarity, determines the likelihood ratio, determine geometric dimension, the side slope material, geotechnical centrifuge of side slope model
Maximum test acceleration；
Model soil characteristic and the native characteristic of practical cut slope to be detected must keep certain similitude, and the present invention is real
It applies example and takes soil on the spot in engineering to be detected, parameter is as shown in table 1.Soil moisture content is measured before dynamic test, by the soil body
Banket identical moisture content 37.5% for preparation and scene, wet density 1.8g/cm3.For testing after shelving diel；According to mesh
Mark dry density calculates every layer of quality of filling soil.
The soil physical property is used in the test of table 1
| Popular name | Maximum dry density | Optimum moisture content | Plastic limit | Liquid limit |
| High liquid limit silt | 1.53g/cm3 | 25% | 46% | 66% |
Using TLJ-150A type geotechnical centrifuge, theoretical maximum centrifugal acceleration is 150g, it is proposed that selection 30g~
120g；Model scale is the 1/70 of prototype size, and test acceleration increases to 70 times of acceleration of gravity, can make answering for model
Power state is consistent with prototype, and the maximum centrifugal acceleration of test model is 70g, in the selection model of TLJ-150A type geotechnical centrifuge
In enclosing；It is as follows that dynamic test simulates cut slope overview: the slope ratio 1:2 of original side slope, and level-one side slope uses Combining Support of Frame Beams of Prestressed Anchor Rope branch
Protect high 8m, slope ratio 1:1.Second level uses friction pile, and high 10m converses each section of dynamic test model using model scale
Size makes shear model box.
S2, the placement in layers cut slope model in shear model box, buries corresponding sensor；Fill cut slope mould
Type includes the compacting of the soil body, the embedded of sensor, the installation and checkout of anchor cable fixed beam 1 and hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6
It is fixed.
Cut slope contour line is drawn in shear model chamber interior wall, according to contour line compacting, fills cut slope；Work as cutting
When side slope fills predeterminated position, corresponding sensor is buried；Reinforcing side slope dynamic test includes acceleration, displacement, axle power, moves
Soil pressure and Vierendeel girder strain.For the deployment scenarios of acceleration transducer, outside shear model box, model casing inside center
Section and parallel cutting surfaces respectively arrange a certain number of acceleration transducers, specifically can be uniaxial using voltage-type microminiature waterproof
Accelerometer provides radix for examining vibration table surface seismic input wave to calculate the soil body and each position enlarge-effect of structure,
And it is compared with shake table acceleration, measure the seismic response at each position and examines the influence on boundary.For displacement sensor
Deployment scenarios, respectively at central section anchor cable, at crossbeam span centre, Vierendeel girder parting place three sections carry out it is horizontal with
Vertical displacement measurement can specifically use current mode DC-DC LVDT displacement transducer, for measuring hinge type anchor cable
The horizontal displacement and vertical displacement of Vierendeel girder 6, what horizontal displacement characterized is the horizontal distortion reaction of soil-slope body, vertical displacement
What is characterized is the Vertical Settlement reaction of soil-slope body.For the deployment scenarios of axial force sensor, each anchor point is equipped with axis
Force snesor can specifically use the small S type tension sensor of voltage-type ZNLBS monetary apparatus, for measuring every prestressed anchor
The anchor force of 8 pre-applied of rope.Dynamic soil pressure sensor is arranged in 3 typical sections, the crossbeam 19 of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6
20 span centre of span centre and stringer can specifically use voltage-type soil-pressure cell, for measuring hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6
Internal soil pressure variable quantity.6 structure of primary study hinge type Combining Support of Frame Beams of Prestressed Anchor Rope of the present invention is in crossbeam 19,20 span centre of stringer, anchor
Admittedly locating the variation of moment of flexure, therefore the nearly slope surface and remote slope surface in single model at crossbeam 19,20 span centre of stringer and anchoring are all provided with
Semiconductor gauge is set.
When cut slope fills the pre-buried position of prestress anchorage cable 8,9 suitable distance of rear side wall away from cut slope is opened
It digging and is parallel to the groove of slope surface, prestress anchorage cable 8 is as far as possible far from slope surface, because under the influence of super gravity field, slight quality
Variation can all cause test result to deviate；Simultaneously for the ease of the installation of anchor cable fixed beam 1, the fixation of prestress anchorage cable,
Prestress anchorage cable 8 cannot abut rear side wall 9；The width of groove is the length of the cross section diagonal of anchor cable fixed beam 1, guarantees anchor
Rope fixed beam 1 can be by freely rotating come inner support in shear model box；The depth of groove be 1 bottom of anchor cable fixed beam extremely
The distance at 5 center of aperture, so that the center of aperture 5 and prestress anchorage cable 8 are in the same horizontal line, in anchor cable fixed beam 1 uniformly
Equipped with multiple apertures 5, the position of aperture 5 and prestress anchorage cable 8 are corresponded, the center elevation and hinge type anchor cable frame of aperture 5
Set a roof beam in place 6 articulated element center it is consistent, so as to prestressed application.
Anchor cable fixed beam 1 is placed in groove, the both ends of anchor cable fixed beam 1 are threaded the first contrary spiral shell
Pit 2, the end 11 of hexagon-headed bolt 3 are screwed into the first threaded hole 2, connect the head 10 of hexagon-headed bolt 3 just
Cabinet 4 is touched, the head 10 of hexagon-headed bolt 3 is then blocked with two monkey wrenches, then with one optimal aperture length is 30mm
Monkey wrench blocked in the centre of anchor cable fixed beam 1, turn an angle towards the direction of rear side wall 9 and drive anchor cable fixed beam
Produce relative rotation between 1 and hexagon-headed bolt 3, due to two pieces of hexagon-headed bolts 3 hand of spiral on the contrary, both ends turret head
Bolt 3 is displaced outwardly simultaneously, promotes the head 10 of hexagon-headed bolt 3 and cabinet 4 to generate squeezing action, by hexagon-headed bolt 3
Make 1 inner support of anchor cable fixed beam between the cabinet 4 of shear model box with the frictional force of cabinet 4, the anchoring section of prestress anchorage cable 8 with
Anchor cable fixed beam 1 connects, and is arranged lucite tube on the free segment of prestress anchorage cable 8, prestress anchorage cable 8 is pierced by hinge type anchor cable
The articulated element of Vierendeel girder 6.
Anchor cable fixed beam 1 rotates one week, distance and turret head of the hexagon-headed bolt 3 along the axial movement of anchor cable fixed beam 1
3 bud of bolt is away from identical, model M10 × 30 of hexagon-headed bolt 3, and bud is away from being 1.5；Anchor cable fixed beam 1 is towards the side of rear side wall 9
To rotation one week, the hexagon-headed bolt 3 of two sides back-outed 1.5mm outward, squeezed the work that cabinet 4 obtains frictional force to reach
With；Contact pressure between the size of frictional force and the degree of roughness of contact surface and object is related, first with sand paper in hexagonal
Rough surface is made on the head 10 of hook bolt 3 and the contact surface of cabinet 4, or rubber is set on the head of hexagon-headed bolt 3 10
Layer；Then have the function that squeeze cabinet 4 to obtain frictional force, often by rotating anchor cable fixed beam 1 towards the direction of rear side wall 9
It rotates a circle, just tests the frictional force of anchor cable fixed beam 1 and cabinet 4 from horizontal direction by dynamometer, ground until meeting
Study carefully requirement.The test method of 1 tensile capacity of anchor cable fixed beam: prestress anchorage cable 8 simulates anchored in situ power 650kN, comprehensively considers
And by Similar, the axle power for needing to bear is 0.138kN (13.8kg), and directly the stainless steel steel of nine equal lengths is twisted
Line passes through aperture 5, stainless steel steel strand wires is fixed in anchor cable fixed beam 1 with anchor cable fixed ring 12, then the same with nine models
Device for measuring force simultaneously outward apply 0.138KN horizontal force, examine anchor cable fixed beam 1 tensile capacity；If not satisfied, continuing
The direction of anchor cable fixed beam 1 towards rear side wall 9 is turned one week or its multiple, make the hexagon-headed bolt 3 at both ends while being moved out
It is dynamic, increase the active force for squeezing cabinet 4, to meet test requirements document；Continue to banket, repeats aforesaid operations and complete second group, the
The installation of three groups of anchor cable fixed beams 1.Wherein, the prestressing force of first group, second group and third group anchor cable fixed beam 1 being anchored
The effective length of anchor cable 8 is according to the linear variation of slope gradient.
The setting of the spacing of aperture 5 is with the spacing setting between the second threaded hole 7 according to hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6
, the spacing between first hole center of the second threaded hole 7 and the last one hole center has 342mm, is 380mm for length
Anchor cable fixed beam 1 for only each remaining 19mm makes the first threaded hole 2 on both sides.But this point distance obviously be it is inadequate,
Firstly, inherently there is plane of weakness between anchor cable fixed beam 1 and hexagon-headed bolt 3, the head 10 of hexagon-headed bolt 3 will come to case
Also need to back-out outward the length of 10mm on body 4, and in the present invention, to guarantee that anchor cable fixed beam 1 and hexagon-headed bolt are kept
Good globality, hexagon-headed bolt 3 must have enough length in the first threaded hole 2, so the present invention selects screw rod long
Degree is the hexagon-headed bolt 3 of 30mm, and the first threaded hole 2 passes through the aperture 5 at both ends, in test, first fixes anchor cable fixed beam 1, will
10 inner support of head of hexagon-headed bolt 3 is between the cabinet 4 of shear model box, at this point, hexagon-headed bolt 3 will not influence prestressing force
Anchor cable 8 passes through aperture 5.
The height of anchor cable fixed beam 1 is corresponding with every thickness degree of shear model box, and is less than adjacent two prestress anchorage cables 8
Vertical range 44mm；Anchor cable fixed beam 1 needs to have enough bending stiffnesses, i.e. EI, and wherein E is the modulus of material, I=b* (h^
3)/12, h is section height, and b, that is, section is wide；The width and height of anchor cable fixed beam 1 are preferably equal, and square cross section is convenient for the
The processing of one threaded hole 2 and the torsion of anchor cable fixed beam 1；There are plane of weakness between hexagon-headed bolt 3 and anchor cable fixed beam 1,
The head 10 of hexagon-headed bolt 3 and the combination degree of anchor cable fixed beam 1 will affect 1 inner support of anchor cable fixed beam in the secured of cabinet 4
Degree, if 1 length of anchor cable fixed beam is inadequate, it is too long to will lead to the reach that hexagon-headed bolt 3 is stretched, and will lead to inner support
Anchored end dies down with hexagon-headed bolt combination degree, influences whole non-deformability, to make anchor cable fixed beam 1 in stainless steel
Excessive deformation is generated during steel strand tension；If anchor cable fixed beam 1 is too long, cause not having when reversing anchor cable fixed beam 1
Enough working spaces；To sum up, anchor cable fixed beam 1 of the invention is having a size of long by 380 × wide by 30 × high 30mm.
The quantity of anchor cable fixed beam 1 is equal with the line number of the second threaded hole 7 on hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6；All anchor cables
Fixed beam 1 is equidistant away from rear side wall 9, convenient for positioning, is conducive to the tensioning degree for grasping prestress anchorage cable 8, convenient for up and down
8 compatible deformation of prestress anchorage cable of setting.
S3 installs hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6, reinforcing side slope；The center of articulated element is equipped with the second threaded hole 7, M5 × 8
(hole 2mm) outer-hexagonal hollow bolt is connected in the second threaded hole 7, and stainless steel steel strand wires pass through outer-hexagonal hollow bolt, is passed through
One end that prestress application device stretches out slope surface to prestress anchorage cable 8 applies prestressing force, then by prestress anchorage cable 8 and outer-hexagonal
Hollow bolt is fixedly connected；
The selection of 6 material of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope: according to the unit mass of EI principle of similarity and different type mold,
The aluminium sheet for having selected the EI similarity degree of lightweight and its bending stiffness EI and live material to be up to 100% is comprehensively considered as frame
Beam simulation material；And since this mold is the hinge effect for needing to realize fabricated construction, for other materials, aluminium
Plate difficulty when processing hinge is smaller.
For Vierendeel girder having a size of wide 0.6m × high 0.6m, stringer 20,19 spacing of crossbeam are 3m, and every three Pin 9m is a frame list
Member.Using C30 armored concrete, elasticity modulus 30GPa, bending stiffness EI=3.24e11, density 2400kg/m3, 1m crossbeam
19,20 weight of stringer is 864kg., model scale 1/70 similar according to bending stiffness EI, obtains cast material EI=1.35e4,
Weight M=2.52g.This compares and analyzes square steel bar, square tube, aluminium sheet, as shown in Table 2.
The bending stiffness of 2 different materials of table and model and Mass Calculation analytical table
By table 2 it is found that only from bending stiffness EI principle of similarity, error < 10% can choose square tube6, square steel1And aluminium
Plate2.It when considering quality of materials, uses the quality of square steel simulation 1m Vierendeel girder (the long L=14mm of model) for 3.85g, is target matter
Amount 153%, can be embedded in the soil body in the case where being centrifuged field action, reduce prestressd anchor cable effect；When square tube being used to simulate quality for
1.43g, only the 57% of aimed quality.Quality is the 97% of aimed quality for 2.44g when using aluminium sheet.The embodiment of the present invention
Need to simulate the hinge of assembling frame beam, stainless steel tube, aluminium alloy rectangular section hollow shell pill and aluminium alloy rectangular section are thin
Wall pipe, stainless steel tube material is since its hardness is larger, so it is not easy to polishing arc surface 14；Aluminium alloy rectangular section hollow shell pill
With aluminium alloy rectangular section thin-wall tube since tube wall is relatively thin, polishing arc surface will lead to structural damage, locally be easy to appear stress
It concentrates；And for hollow shell pill and thin-wall tube, the hinge arrangement processed can occur due to self-tapping screw 13 and tight
The embedded squeezing power at end is insufficient and causes structure under the effect of external force and the phenomenon that disintegrate.
Therefore the present embodiment selects aluminium sheet2Mould as the crossbeam 19 of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6, stringer 20 or articulated element
Quasi- material, elasticity modulus 70GPa, having a size of wide 10.7mm × high 6mm.
The active end of crossbeam 19, stringer 20 or articulated element is drilled with the straight shank twist drill of 2.0mm, and it is logical to form 2.0mm
Hole；Crossbeam 19, stringer 20 or articulated element tight end first drilled with the straight shank twist drill of 1.6mm, then again with M1.8 ×
0.35 straight trough screw tap carries out tapping, forms 1.8mm threaded hole.
As Figure 4-Figure 6, articulated element include two hinge formula component (M11, M13, M31, M33), three hinge formula components (M12,
M21, M23, M32), four hinge formula component (M22)；Four corners of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6 are two hinge formula components, hinge type
Four edge of Combining Support of Frame Beams of Prestressed Anchor Rope 6 are three hinge formula components, and the centre of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6 is four hinge formula components, are passed through
Four hinge formula components can extend the area coverage of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6, realize assembling type functional, either hinge type anchor cable
There is damage in the component of any one position of Vierendeel girder 6, can be replaced by detaching structure, avoids for test
As a result it has an impact；By taking four hinges formula component (M22) as an example, the tight of component M22 is screwed into from the active end of crossbeam 19 with self-tapping screw 13
Self-tapping screw 13, since the size of the M22 threaded hole tightly held is as the size of self-tapping screw, can thus be anchored on by end
In threaded hole；And the clear size of opening of 19 active end of crossbeam is greater than the diameter of self-tapping screw 13, crossbeam 19 can be with self-tapping screw 13
It is rotated for axis, forms the hinge arrangement of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6, model M1.8 × 10 of self-tapping screw 13.
As shown in fig. 7, arc surface 14 with tight end is polished into the active end of the nearly slope surface of crossbeam 19 to illustrate, crossbeam 19, stringer
The L-type connecting pin of 20 nearly slope surfaces is polished into arc surface 14, and hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6 is enabled to pass through the tight end at its hinge
Design and arc surface 14 with active end adapt to the deformation of soil-slope, to realize the flexible support of structure.
S4 weighs the shear model box to complete, and total weight G calculates counterweight (test model and the quiet anomaly of counterweight weigh),
Shear model box is hung on the centrifuge Hanging Basket of geotechnical centrifuge with gantry crane, video camera is installed, opens photography software, is checked
Situation in laboratory, it is ensured that the safety of test process instruments and personnel opens centrifuge monitoring device, data acquisition equipment.
Test uses TLJ-150A type geotechnical centrifuge, has the acquisition of voltage-type data on centrifuge data acquisition panel 15
Channel, current mode data acquisition channel and strain type data acquisition channel, the number that will arrange that measuring point is drawn in shear model box
According to line according to its signal transport-type (voltage-type or current mode) packet numbering, and to corresponding on centrifuge data acquisition panel 15
Acquisition channel be numbered, the sensor of output voltage signal is connected to voltage data acquisition channel, will output electric current letter
Number sensor be connected to current data acquisition channel；Wherein strain type data acquisition channel only has 16, respectively YB01,
YB02,YB03,YB04,YB05,YB06,YB07,YB08,YB09,YB10,YB11,YB12,YB13,YB14,YB15,YB16；So
And acceleration, soil pressure, displacement and axle power are all the amounts that can directly measure in the present invention, and selection characteristic point is only needed in test
Measurement；Strain type DATA REASONING purpose is primarily to calculate the moment of flexure that Vierendeel girder is born, in all necessary cloth in Vierendeel girder two sides
Foil gauge is set, arranges that the density of measuring point is big, quantity is more, and the foil gauge of actual needs acquisition data is up to more than 70, so for existing
Some is once for test, and the quantity of strain type data acquisition channel is far from being enough, so wanting peripheral hardware that can increase data
The device of acquisition channel.
The present invention increases device 16 using data acquisition channel, as shown in figure 8, to the channel province of middle section
Slightly, including 16 data line interfaces 17, centrifuge data acquire the strain type data acquisition channel of panel 15 by shielding line with
Data line interface 17 connects, and each data line interface 17 connects corresponding shielding line interface 18,6 by 6 converted channels respectively
A converted channel is respectively T1, T2, T3, T4, T5 and T6, and the opening and closing of each converted channel are controlled by radio station
's；All shielding line interfaces 18 are connect by the shielding line of 8 cores with each foil gauge, can thus be completed by test of many times
The measurement of more strain datas.
Foil gauge more than 70 of actual needs acquisition data, for 80, each foil gauge is connect with shielding line, and every 16
Root shielding line is one group, and totally 5 groups, the 1st group of shielding line is separately connected the corresponding screen of converted channel T1 of 16 data line interfaces 17
It covers on line interface 18, the corresponding shielding line interface of converted channel T2 that the 2nd group of shielding line is separately connected 16 data line interfaces 17
On 18, on the corresponding shielding line interface 18 of converted channel T3 that the 3rd group of shielding line is separately connected 16 data line interfaces 17, the 4th
Group shielding line is separately connected on the corresponding shielding line interface 18 of converted channel T4 of 16 data line interfaces 17, the 5th group of shielding line
It is separately connected on the corresponding shielding line interface 18 of converted channel T5 of 16 data line interfaces 17；Converted channel is controlled by radio station
The opening and closing of T1-T5 are tested every time, and 1 only controlled in 6 converted channels that each data line interface 17 connects opens
It opens, is acquired by the data that 80 foil gauges are completed in 5 tests, all data lines all require during test
Shielding action.
S5 inputs earthquake load, acquires dynamic test data；
El-Centro seismic wave, Taft wave, monochromatic wave Acceleration time course are inputted respectively to Centrifugal vibration platform, and first two adds
Speed time-history curves such as Fig. 9~10.Wherein, El-Centro wave successfully records the earthquake of overall process data as first item in the world
Wave has typicalness, is of great significance to the research in terms of progress earthquake；And Taft wave is since its record is complete, data
Reliably, it is at home and abroad widely used in earthquake engineering；Monochromatic wave for this research do numerical simulation calculation have it is most important
Effect.
It in primary test, can complete to simulate multiple same waveforms or different wave, but between needing between two waveforms
Have a rest 30s or more, and the test earthquake of this Centrifugal vibration is lasted for 3s, and test for the first time connects channel T1 by radio station, primary to vibrate
It shake table shutdown 1 minute or more after the completion, allows soil-slope body to be restored to the state before earthquake, inputs same earthquake again later
Wave is simultaneously switched to next channel and is tested, and is sequentially completed the acquisition of strain data, and other sensors take test institute for the first time
The data of acquisition.
The top of the slope sinkage of soil-slope body, and the failure mode of observational record soil-slope body are measured after the test；
By system-down, various kinds of sensors is removed, sublevel unloads soil, removes stainless steel steel strand wires and hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6.
The present invention simulates the technical effect verifying of the assembling frame beam reinforcing side slope power determination method of earthquake:
Existing side slope dynamic model device generally uses following three kinds of mode anchoring prestress anchor cable 8: directly prestressing force
Anchor cable 8 is embedded in the soil body, in soil-slope embedded set aluminium sheet, the embedding aluminium block of suitable position in soil-slope；With the present invention
Anchor cable fixed beam 1 compare test, it is as a result as follows:
Directly prestress anchorage cable 8 is embedded in the soil body, since the diameter of prestress anchorage cable 8 is smaller, the model soil body resists
Draw scarce capacity, it is easy to be pulled out and, it is difficult to apply prestressing force；In soil-slope embedded set aluminium sheet, all prestressed anchors
Rope 8 is each attached on aluminium sheet, slowly applies active force to prestress anchorage cable 8, when power is added to 0.136KN, between the soil body and aluminium sheet
" coming to nothing " phenomenon has taken place, therefore cannot not only have been met the requirements in terms of power using the form of aluminium sheet, but also cannot
Simulate shearing effect of the soil-slope under geological process；The embedding aluminium block of suitable position in soil-slope, each prestressed anchor
Rope 8 is fixedly connected with corresponding aluminium block, slowly applies active force to prestress anchorage cable 8, when power is added to 0.003KN, the soil body and aluminium
It begins to that " coming to nothing " phenomenon has occurred between block；Although this mode can simulate shearing effect of the soil-slope under geological process
It answers, but the aspect of power is far from enough；In the present invention, when power is added to 1.242KN, the combination journey of anchor cable fixed beam 1 and the soil body
Degree is good, and there is no " coming to nothing " phenomenons, and power maximum may be added to 2.683KN；This mode not only expires in terms of power
Foot requires, and can also simulate shearing effect of the soil-slope under geological process well.
Hinge type Combining Support of Frame Beams of Prestressed Anchor Rope of the present invention reinforces the advantage of soil-slope dynamic model device:
1, the active end of crossbeam 19, stringer 20 and articulated element, the design tightly held can more accurately simulate prototype hinge type
The flexible support of Combining Support of Frame Beams of Prestressed Anchor Rope ruggedized construction；Prototype 1m, the hinge arrangement of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6 is under 70g state
Conversion size only has 14mm, and existing hinge arrangement size is big, it is difficult to directly use, it is whole in order to meet if hinge arrangement is too big
Body size, crossbeam 19, stringer 20 size need to accordingly reduce, reduced with prototype similarity, while it is curved to influence crossbeam 19, stringer 20
The accuracy of square measurement；Hinge type Combining Support of Frame Beams of Prestressed Anchor Rope 6 includes multiple crossbeams 19, stringer 20 and articulated element, crossbeam 19 and stringer
20 are mutually perpendicular to, between crossbeam 19 and stringer 20 by articulated element connect, due to the active end of each crossbeam 19 or stringer 20 with
The tight end of articulated element is connected by self-tapping screw 13, and the active end at the tight end and articulated element of each crossbeam 19 or stringer 20 passes through
Self-tapping screw 13 connects；It is easy to disassemble, it is destroyed at hinge, is easy to repair, any hinge destroys, and replacement, which is located at, lives
End, the component and self-tapping screw 13 tightly held；In addition to self-tapping screw 13 is 6 statures of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope at hinge
Matter is high with prototype similarity；Crossbeam 19, stringer 20 nearly slope surface end be set as arc surface 14, can preferably adapt to the swollen of the soil body
Bulging deformation realizes the flexible support feature of Combining Support of Frame Beams of Prestressed Anchor Rope, can be good at simulating prototype hinge type Combining Support of Frame Beams of Prestressed Anchor Rope compacted soil
The stress and strain of matter side slope is horizontal.
2, the prestress application of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope ruggedized construction can be simulated；At the scene on the spot, prestress anchorage cable 8
Typically be fixed on basement rock, but since this model test is studied on the spot, the range of soil-slope is larger, basement rock away from
The position of slope surface farther out, needs to be anchored into basement rock by the hole of rock mass weak structural face by anchor head, straight due to prestress anchorage cable 8
Diameter is smaller, and if it is being fixed on basement rock, prestress anchorage cable 8 is larger for the pulling force effect of unit area basement rock, to basement rock
Intensity and globality are more demanding, if the intensity of basement rock is insufficient or globality is bad, the tensioning difficulty of prestress anchorage cable 8 is just
It will increase；One end of prestress anchorage cable 8 is fixed on inside soil-slope by the present invention using anchor cable fixed beam 1, anchor cable fixed beam 1
Both ends by two 3 inner supports of hexagon-headed bolt in shear model box, under the action of seismic wave, anchor cable fixed beam 1 with cut
Cut the cabinet 4 of model casing compatible deformation together, can be good at simulating shearing effect of the semo-infinite soil body under geological process with
Boundary condition.
3, the present invention is based on the existing data collection systems of centrifuge, increase by 16 pairs of device strains using data acquisition channel
Type data acquisition channel is expanded, although being to increase in test period, data transmission it is upper just than being wirelessly transferred,
It is more stable, reliable that data acquisition equipment is adopted at scene.The case where transmission of data can in the Central Control Room direct viewing of centrifuge, and
And it is at low cost, it is best suitable for research actual conditions, it is economical and can recycle, considerably increase its economic benefit.
Data transmission stablizes, is reliable: 3 stages of centrifuge test point, centrifuge start to stabilization, the stability test stage,
Off-test stops to complete.70g centrifugal test and stability test time are 30 minutes, and test starting is stablized to 70g needs 25 points
Clock stablizes 30 minutes, shuts down 15 minutes, and total time-consuming 70 minutes；High-frequency with data storage function now acquire equipment be from
Line, acquisition equipment must be opened before on-test and is acquired, and off-test could terminate acquisition after ensuring safety, even if not
Consider that centrifuge leaves the theatre and marches into the arena the time, the test for completing to run under a 70g 30 minutes acquires 70 minutes test datas；
Channel of the invention increase system using radio station carry out data acquisition channel shut down and the switching in different switching channel, from
When scheming is stable, start to acquire data, closing when centrifuge starts to shut down, greatly reduction invalid data
Amount；The case where transmission of data of the present invention, can monitor in real time in the Central Control Room direct viewing of centrifuge, and data acquisition is quasi-
Really, guarantee data storage, prevent loss of data.
At low cost: data acquisition channel, which increases the circuit board of device 16 and its development cost of control method, only needs 30,000 yuan,
It is also only needed two months on time；If directly increased by existing data acquisition device, producer purchases is with installation time
Half a year, increasing by 96 channel expenses was 115.2 ten thousand yuan to 1 year；High-frequency acquires (5KHz) and radio transmitting device, cost also mistake
Height needs more than 90 ten thousand yuan.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforces soil-slope dynamic model device, which is characterized in that including shear model box,
Geotechnical centrifuge, data collection system；Cut slope model is filled in the shear model box, shear model box is placed in geotechnique
On the centrifuge Hanging Basket of centrifuge, data collection system includes that data acquisition channel increases device (16), and data acquisition channel increases
Feeder apparatus (16) is equipped with multiple data line interfaces (17), and each data line interface (17) passes through shielding line and corresponding strain type
Data acquisition channel connection, each data line interface (17) connect corresponding shielding line interface by multiple converted channels respectively
(18), the opening and closing of each converted channel by radio station control, all shielding line interfaces (18) pass through shielding line with it is corresponding
Strain transducer connection；The slope surface of the cut slope model is provided with hinge type Combining Support of Frame Beams of Prestressed Anchor Rope (6), hinge type anchor cable frame
Set a roof beam in place (6) include multiple crossbeams (19), stringer (20) and articulated element, crossbeam (19) and stringer (20) are mutually perpendicular to, crossbeam
(19) it is connected between stringer (20) by articulated element, be equipped with horizontal positioned inside the cut slope model and be parallel to slope
The anchor cable fixed beam (1) in face, for anchor cable fixed beam (1) inner support in shear model box, all articulated elements pass through prestressed anchor
Rope (8) is fixedly connected with anchor cable fixed beam (1).
2. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 1 reinforces soil-slope dynamic model device, feature
It is, the both ends of each crossbeam (19) or stringer (20) are equipped with L-type connecting pin, each crossbeam (19) or stringer (20)
L-type connecting pin is respectively active end and tight end, and the articulated section of each articulated element is equipped with L-type connecting pin, and the L-type of articulated element connects
It connects end and is equipped with active end and tight end, the active end of crossbeam (19), stringer (20) or articulated element is equipped with through-hole, crossbeam (19), stringer
(20) or the tight end of articulated element is equipped with threaded hole, and the aperture of threaded hole is less than the aperture of through-hole, each crossbeam (19) or vertical
The active end of beam (20) and the tight end of articulated element are connected by self-tapping screw (13), the tight end of each crossbeam (19) or stringer (20)
It is connect with the active end of articulated element by self-tapping screw (13)；Crossbeam (19), stringer (20) nearly slope surface end be set as arc surface
(14)。
3. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 2 reinforces soil-slope dynamic model device, feature
It is, the both ends of the anchor cable fixed beam (1) are threaded contrary the first threaded hole (2), and the first threaded hole (2) is interior
Hexagon-headed bolt (3) are installed respectively, anchor cable fixed beam (1) by two hexagon-headed bolt (3) inner supports in shear model box, in advance
One end of stress anchor cable (8) is anchored on anchor cable fixed beam (1), and the other end of prestress anchorage cable (8) is pierced by articulated element
The heart is fixedly connected after prestress application with articulated element.
4. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 3 reinforces soil-slope dynamic model device, feature
It is, the center of the articulated element is equipped with the second threaded hole (7), outer-hexagonal hollow bolt is installed in the second threaded hole (7),
Prestress anchorage cable (8) uses stainless steel steel strand wires, and the outer cover of stainless steel steel strand wires is equipped with organic glass that inner wall smears lubricant
Glass pipe is uniformly provided with multiple apertures (5) in anchor cable fixed beam (1), and stainless steel steel strand wires one end passes through aperture (5) and passes through anchor cable
Fixed ring (12) is fixedly connected with anchor cable fixed beam (1), and the stainless steel steel strand wires other end is pierced by outer-hexagonal hollow bolt, prestressing force
It is fixedly connected after application with outer-hexagonal hollow bolt.
5. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 1 reinforces soil-slope dynamic model device, feature
It is, the correspondence measuring point of the cut slope model is equipped with acceleration transducer, displacement sensor, axial force sensor, pressure of breaking ground
Force snesor, the centrifuge data of geotechnical centrifuge acquire and are additionally provided with voltage-type data acquisition channel, current mode on panel (15)
Data acquisition channel, voltage-type data acquisition channel are connect with voltage sensor, current mode data acquisition channel and current mode
Sensor connection.
6. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 4 reinforces soil-slope dynamic model device, feature
It is, the height of the anchor cable fixed beam (1) and every thickness degree of shear model box are corresponding, and are less than adjacent two prestressing force
Anchor cable (8) vertical range, the width and height of anchor cable fixed beam (1) are equal.
7. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 4 reinforces soil-slope dynamic model device, feature
Be, the anchor cable fixed beam (1) rotates one week, hexagon-headed bolt (3) along the axial movement of anchor cable fixed beam (1) distance and
The bud of hexagon-headed bolt (3) is away from identical.
8. a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 4 reinforces soil-slope dynamic model device, feature
It is, the crossbeam (19), stringer (20) or articulated element are all made of wide 10.7mm, the aluminium sheet of high 6mm is made.
9. the test method that a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforces soil-slope dynamic model device, which is characterized in that use
Such as a kind of described in any item hinge type Combining Support of Frame Beams of Prestressed Anchor Rope reinforcing soil-slope dynamic model devices of claim 1-8, specifically press
It is carried out according to following steps:
S1 is based on the theory of similarity, determines the likelihood ratio, determines the geometric dimension of side slope model, side slope material, geotechnical centrifuge most
Big test acceleration；
S2, the placement in layers cut slope model in shear model box；When cut slope fills predeterminated position, bury corresponding
Sensor；When cut slope fills the pre-buried position of prestress anchorage cable (8), the rear side wall (9) away from cut slope is appropriate
Distance excavates the groove for being parallel to slope surface, anchor cable fixed beam (1) is placed in groove, inner support is in the cabinet of shear model box
(4) between, prestress anchorage cable (8) one end is connect with anchor cable fixed beam (1), and the other end of prestress anchorage cable (8) stretches out slope surface；
S3 is installed hinge type Combining Support of Frame Beams of Prestressed Anchor Rope (6), reinforcing side slope；Prestress anchorage cable (8) passes through the center of articulated element, passes through
One end that prestress application device stretches out articulated element to prestress anchorage cable (8) applies prestressing force, then by prestress anchorage cable (8)
It is fixedly connected with articulated element；
S4 weighs the shear model box to complete, calculates counterweight, and the centrifuge that shear model box hangs geotechnical centrifuge is hung
On basket, video camera is installed, opens photography software, the case where in checkout facility room, it is ensured that after safety, opens centrifugation machine monitoring and sets
Standby, data acquisition equipment；
S5 inputs earthquake load, acquires dynamic test data.
10. the test that a kind of hinge type Combining Support of Frame Beams of Prestressed Anchor Rope according to claim 9 reinforces soil-slope dynamic model device
Method, which is characterized in that in the S2, the width of groove is the length of the cross section diagonal of anchor cable fixed beam (1), groove
Depth is the distance at anchor cable fixed beam (1) bottom to aperture (5) center, and anchor cable fixed beam is uniformly provided with multiple apertures on (1)
(5), the position of aperture (5) and prestress anchorage cable (8) correspond, the center elevation and hinge type Combining Support of Frame Beams of Prestressed Anchor Rope of aperture (5)
(6) articulated element center is consistent.
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