CN110186369A - The experimental provision and method of reinforcement ring strain in a kind of detection earth structure - Google Patents
The experimental provision and method of reinforcement ring strain in a kind of detection earth structure Download PDFInfo
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- CN110186369A CN110186369A CN201910417233.4A CN201910417233A CN110186369A CN 110186369 A CN110186369 A CN 110186369A CN 201910417233 A CN201910417233 A CN 201910417233A CN 110186369 A CN110186369 A CN 110186369A
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- shingle nail
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the experimental provision and method of reinforcement ring strain in a kind of detection earth structure, belong to muscle material stress and strain field in earth structure object.It includes reaction frame (10), model casing (30), reinforcement ring (20), resistance strain gauge, controller (50), rainwater simulator (60) and pressurizing device (90), shingle nail (34) are carried in model casing (30), lacing wire (35), filler and the reinforcement ring (20) being embedded in filler, its lacing wire (35) is uniformly distributed to be pasted on shingle nail (34) and smooth horizontal tensioning layer by layer, several reinforcement rings (20) are filled according to layer after every layer of filler is smooth, shingle nail, lacing wire, filler and the reinforcement ring being embedded in filler form earth structure after tamping.The detection process of apparatus of the present invention has more specific aim, and apparatus structure is simple, and failure rate is low and for ease of maintenaince, long service life, has broad application prospects in terms of reinforcement ring strain in detecting different filler earth structures.
Description
Technical field
The present invention relates to muscle material stress and strain field more particularly to a kind of detection reinforced earths in research earth structure object
The experimental provision and method that reinforcement ring strains in structure.
Background technique
Reinforced earth is exactly to do reinforcement processing in the filler of compacting, can be obtained and lacing wire tension in lacing wire direction
The adaptable cohesive strength of intensity becomes the composite construction that can support external force self weight.Earth structure generally by shingle nail,
The major parts such as reinforcement material and soil body filler composition.The structure there is on shingle nail pressure, soil body filler gravity pressure,
The balance of frictional force etc. between lacing wire pulling force and soil body filler and rib, these interactions ensure that the stabilization of the composite construction
Property.Generally speaking, earth structure is using generated frictional force between soil body filler and rib, and making the soil body is in complex,
Soil strength is improved, the lateral pressure of filler generation after shingle nail is resisted.
But engineering practice and theoretical research in recent years shows earth structure and the detection carried out to it, and there is some
It is difficult to solve the problems, such as.Such as the existing device to earth structure detection not only measures that time-consuming, but also not can be carried out continuous survey
Amount, service life is short, also very unfriendly to environment.
Summary of the invention
It is an object of the invention to overcome the shortcomings of in the prior art, reinforcement ring in a kind of detection earth structure is provided and is answered
The experimental provision and method of change, to solve measurement existing for the existing device to earth structure detection, time-consuming, not can be carried out
The problems such as continuous measurement, service life is short, also very friendly to environment.
The object of the present invention is achieved like this:
The present invention provides a kind of experimental provision for detecting reinforcement ring strain in earth structure comprising reaction frame, adds model casing
Muscle ring, resistance strain gauge, controller, rainwater simulator and pressurizing device；
The reaction frame includes supporting beam, left side arm, right arm, pedestal, and the left side arm, right arm separate from the support of accumbency
Beam two sides and it is vertical with the supporting beam be connected, bottom is vertical with pedestal respectively to be connected, and the model casing is arranged in supporting beam
Underface, the bottom of the model casing is movably connected with the base；
The model casing is the cabinet of open topped, interior carrying shingle nail, lacing wire, filler and the reinforcement being embedded in filler
Ring, the shingle nail are adjacent to and are flexibly connected with the front side wall of model casing, and the lacing wire is uniformly distributed is pasted onto shingle nail layer by layer
Upper and smooth horizontal tensioning, layering landfill filler, the middle part after every layer of filler is smooth in the model casing, if being filled according to layer
Dry reinforcement ring arranged in parallel, the reinforcement ring are alternately arranged with lacing wire, are distributed in different packing layers, and from below to up, institute
Reinforcement ring and lacing wire are stated in being distributed from small to large, the shingle nail, lacing wire, filler and the reinforcement ring being embedded in filler are through tamping
After form earth structure；
At least two panels resistance strain gage, the resistance strain gage and resistance strain gauge phase are symmetrical arranged in the middle part of the reinforcement ring outer wall
Even；
The central fit beneath of the supporting beam has pressurizing device, and the pressurizing device is under controller control to dismounting mould
The earth structure of molding box applies pressure；
The down either side of the supporting beam is equipped with several rainwater simulators, and the rainwater simulator is in the controller
The lower work of control.
It optionally, further include several demixing plates in model casing of the present invention, the demixing plate is horizontally disposed, and described
Model casing side walls upper and lower translation；Preferably, the demixing plate is arranged in the middle part of model casing.
Optionally, model casing of the present invention includes front panel, three face ring sidings, bottom plate, movable bolt, discharge outlet, institute
It states front panel, three face ring sidings and bottom plate to be connected each other, the shingle nail is bonded setting by movable bolt with front panel, described
The bottom of ring wall plate is arranged in discharge outlet.
Optionally, the open topped of model casing of the present invention is in rectangle, arch or circle.
Optionally, pressurizing device of the present invention includes hydraulic jack and pressing plate, and the pressing plate is horizontally fixed on hydraulic
The bottom of jack.
The present invention also provides a kind of experimental method of the experimental provision of reinforcement ring strain in detection earth structure, packets
Include following steps:
Step 1: composition model case, the front panel of model casing, three face ring sidings and bottom plate are reliably connected each other by angle steel and screw
It connects, assembled open topped model casing is carefully placed on the pedestal of reaction frame, the position of model casing is adjusted, makes
With the card slot stent molding box on pedestal, touching model casing and not occurring to be obviously displaced is advisable；
Step 2: shingle nail is placed in model casing, it is close to connection with front panel by movable bolt, lacing wire is uniformly arranged layer by layer
Cloth fills filler to layering in model casing on shingle nail, and with shingle nail reliable bond and smooth horizontal tensioning, and at every layer
Middle part after filler is smooth fills filler top surface high to design according to the parallel embedding reinforcement ring 20 for pasting resistance strain gage of layer
Journey face；
Step 3: using filler in solid hammer compacting case, measurement compacting effect preferably removes front panel afterwards, constitutes earth structure
Experimental model；
Step 4: controlling pressurizing device by controller applies different grades of pressure to earth structure, can start when necessary
Rainwater simulator；
Step 5: detecting strain variation situation of the reinforcement ring under pressurized condition by resistance strain gauge and recording；
Step 6: disassembling and cleaning above-mentioned experimental provision.
Optionally, in step 2 of the present invention, the reinforcement ring is placed in that ditch depth is deeper than the height of reinforcement ring, furrow width is wider than reinforcement
Filler Middle face in the circular groove of the thickness of ring, after the circular groove excavation is smooth in every layer.
Optionally, in step 2 of the present invention, if different fillers need to be filled, filler will after filling to model casing predeterminated position
Filler flattens and fixes demixing plate, then changes and fill out another filler and continue to fill.
Optionally, it in step 3 of the present invention, need to be handled with care when removing front panel, first the careful movable screw released on cabinet
Bolt, then front panel is integrally removed stands 1min, observes earth structure, if there is sand leakage or earth structure large area collapses
It collapses phenomenon, repeats step 2-step 3, until constituting the experimental model of stable earth structure.
Beneficial effect
(1) present invention is simple to the apparatus structure of earth structure detection, and failure rate is low and for ease of maintenaince, and detection process has more needle
Detection can be repeated without time restriction to property, and relative to conventional test methods, substantially reduce detection time；
(2) for the present invention to the device of earth structure detection, it is hard that model casing and reaction frame etc. are all made of metal and glued board etc.
Material, not cracky, service life of equipment is long, also very friendly to environment；
(3) experimental provision of the invention applies different grades of pressure by pressurizing device, can directly detect the strain of reinforcement ring
Variation, especially detects the strain variation of reinforcement ring in different filler earth structures, specific aim is stronger；Its rainwater simulator
Analog rainfall, and then detect the variation of reinforcement ring strain in earth structure in complex situations.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's is schematic
Embodiment and its explanation do not constitute the restriction to the application for explaining the application.
Fig. 1 is the structure front view of the experimental provision of reinforcement ring strain in a kind of detection earth structure of the present invention；
Fig. 2 is model casing cross sectional view of the invention in Fig. 1；
Fig. 3 is model casing top view of the invention in Fig. 1；
Wherein, reaction frame 10
Supporting beam 11
Left side arm 12
Right arm 13
Pedestal 14
Reinforcement ring 20
Model casing 30
Front panel 31
Ring wall plate 32
Bottom plate 33
Shingle nail 34
Lacing wire 35
Movable bolt 36
Demixing plate 37
Discharge outlet 38
Resistance strain gage 40
Controller 50
Rainwater simulator 60
Pressurizing device 90
Hydraulic jack 91
Pressing plate 93.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless otherwise finger
Bright, all technical and scientific terms used herein has to be generally understood with the application person of an ordinary skill in the technical field
Identical meanings.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In order to facilitate narration, if there is "upper", "lower", " left side " " right side " printed words in the present invention, only expression and attached drawing itself
Upper and lower, left and right direction it is consistent, not to structure rise restriction effect, it is only for convenient for description the present invention and simplification retouch
It states, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, and be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
It has been mentioned above, engineering practice and theoretical research in recent years shows that earth structure is difficult to there is some
It solves the problems, such as.Such as reinforcement material anti-corrosion and to earth structure theoretical calculation in the adaptability problem of the soil body, engineering construction
As a result not the problem of not matched that with Practical Project etc..In order to overcome these problems, China proposes a kind of the new of alternative lacing wire
Type material --- reinforcement ring.But technology development is not yet mature, especially probes into reinforcement ring in different filler earth structure objects
In stress and strain stress relation the problems such as preferable solution is not yet received.Reinforcement ring is carried out using planar loading method in common engineering to exist
Stress test in earth structure object, but more manpower and material resources need to be expended and be further applied load and building reinforced structure object, often
Need several hours even more just achievable test long, test efficiency lower.And the use of reinforcement ring is influenced by factors, very
Important one is the reinforced earth body i.e. adaptability problem of filler, studies reinforcement ring to the adaptability of different fillers and utilizes reinforcement
The strain of ring reflects that its effectiveness has great significance.
The present invention is in view of the above-mentioned problems, the invention discloses a kind of experiment dresses of reinforcement ring strain in detection earth structure
It sets comprising reaction frame 10, reinforcement ring 20, model casing 30, controller 50, rainwater simulator 60, resistance strain gauge, pressurization dress
Set 90.As shown in Figure 1, wherein reaction frame 10 includes supporting beam 11, left side arm 12, right arm 13 and pedestal 14.Its left side arm
12, right arm 13 separate from accumbency 11 two sides of supporting beam and it is vertical with the supporting beam 11 be connected, bottom respectively with pedestal
14 is vertical connected.The underface of supporting beam 11 is arranged in model casing 30, and bottom is flexibly connected by card slot with pedestal 14, with side
Just the dismounting of model casing 30 and cleaning.
Model casing 30 is the cabinet of open topped, interior to carry shingle nail 34, lacing wire 35, filler and be embedded in filler
Reinforcement ring 20.30 main body of model casing is composed of glued board, is reliably connected between each panel by angle steel and screw comprising
One front panel 31, three face ring sidings 32, bottom plate 33, several movable bolts 36, discharge outlet 38, the front panel 31 and three face rings
Siding 32, bottom plate 33 are connected each other.Shingle nail 34 of the synthetic rubber such as butadiene-styrene rubber (SBR) or other flexible materials by being made
Thin plate, shingle nail 34 become placed against with front panel 31 by movable bolt 36, and ring wall plate 32 is arranged in the discharge outlet 38
Drainpipe extraction is arranged at bottom.Front panel 31 is used to support shingle nail 34, when not filled filler, is combined with ring wall plate 32, is
Earth structure provides lateral confinement, as shown in Figure 2.The open topped of model casing 30 is in rectangle, arch or circle etc., such as model casing 30
Box sizes are long 1.2m* wide 1m* high 1m, and the cabinet of the domed open topped of shingle nail 34, as shown in Figure 3.Lacing wire 35
Material be polypropylene plastics or other flexible materials with certain tensile strength, be uniformly distributed and be pasted onto shingle nail layer by layer
On 34 and smooth horizontal tensioning, generally, the anchorage length of lacing wire 35 is not less than 20 centimetres.Layering landfill in the model casing 30
Filler, filler can be multiple types, including clay, sand, refuse soil, rubble etc..After every layer of filler is smooth, in filler
Portion fills several reinforcement rings 20 arranged in parallel according to layer, reinforcement ring 20 in a ring, using butadiene-styrene rubber or other synthetic rubber
It is made.Reinforcement ring 20 is arranged in every layer of filler Middle face, is alternately arranged with lacing wire 35, and lacing wire 35 is closer to shingle nail 34
Side, reinforcement ring 20 only with the top half arranged superposed of lacing wire 35, preferably to constitute earth structure.Reinforcement ring 20 with
Lacing wire 35 is in different packing layers, as shown in Figure 2.Reinforcement ring and lacing wire that can be different according to test demand arrangement specification, every kind of rule
The reinforcement ring size of lattice can not wait, and such as from below to up, the semidiameter of reinforcement ring is 0.1m.Fig. 2 shows a kind of specific arrangements
Mode, reinforcement ring 20 use two kinds of models, and the setting of reinforcement ring 20 that radius 0.25m, wall thickness are 8cm is drawn in lower part several layers
Muscle length 0.5m；The reinforcement ring 20 that radius is 0.35m, wall thickness is 8cm is arranged in top several layers, drawing rib length 0.7m.
It is symmetrically arranged with resistance strain gage 40 in the middle part of 20 outer wall of reinforcement ring, the resistance strain gage 40 is arranged specifically
Quantity is at least arranged symmetrically two panels and is connected with resistance strain gauge (not shown) depending on requirement of experiment.
The shingle nail 34, lacing wire 35, filler and the reinforcement ring 20 being embedded in filler form reinforced earth knot after tamping
Structure.
Several also settable demixing plates 37 in model casing 30, material is glued board, for filling different fillers, with
Detect the strain variation situation of reinforcement ring 20 in earth structure in the case where adding different fillers.Demixing plate 37 is horizontally disposed,
Pressure, Fig. 2 can be transmitted to lower layer's filler with model casing side walls upper and lower translation to apply vertical pressure time-division laminate 37
In, signal in the middle part of model casing is set to a demixing plate 37.
As shown in Fig. 2, the central fit beneath of supporting beam 11 has pressurizing device 90, the pressurizing device 90 is by hydraulic jack
91 and pressing plate 93 constitute, pressing plate 93 is horizontally fixed on the bottom of hydraulic jack 91, for the reinforced earth for removing model casing 30
Structure applies different grades of pressure, can detect the size that reinforcement ring 20 strains in the case where being pressurizeed.
The down either side of supporting beam 11 is equipped with several rainwater simulators 60, and the rainwater simulator 60 is described
The control of controller 50 is lower to open rainwater simulator 60.Rainwater simulator 60 is supplied water by external water pipe, and controller 5 is adjusted
The size of Simulated rainfall is saved, the water in final case is discharged by discharge outlet 38.The 60 analog rainfall of rainwater simulator,
And then detect the situation of change that reinforcement ring 20 strains in earth structure in complex situations.
The working principle of reinforcement ring 20 is to make full use of the higher characteristic of synthetic rubber tensile strength, produces filler in annulus
Raw lateral pressure turns to be undertaken by reinforcement ring 20；Filler in annulus is squeezed under vertical uniform load q and generates lateral swollen
It is swollen, and reinforcement ring 20 has fettered this lateral deformation.Reinforcement ring 20 has blocked transmitting of the ring inside pressure to outside ring, and in ring
Filler forms " cake " shape reinforcing body, forms earth structure entity after several layers " cake " shape reinforcing body is cross-superimposed.Reinforcement
Coulomb or Rankine theoretical calculation can be used in the external stabilization of soil structure.
Since 34 wall of shingle nail of the present invention back is vertical, smooth, ignores the frictional force between wall back and filler, therefore can utilize bright
Agree active earth pressure formula, the limit equilibrium condition according to the soil body is not considered cohesive strength c, obtained due to the inviscid filler of filler
It arrives:
pa=γ × z × Ka
In formula: Ka--- coefficient of active earth pressure；γ --- filler severe after wall, unit: kN/m3, with having below level of ground water
Imitate severe；--- the internal friction angle of filler after wall, unit: °；Z --- the depth a little apart from filler face is calculated, unit: m.
The solution of active earth pressure is conducive to study the stress characteristic of earth structure, the embedding reinforcement ring 20 in reinforced earth
In the case where, it can preferably detect the strain characteristics of reinforcement ring 20 in earth structure.
The experimental method of the experimental provision of reinforcement ring strain in a kind of detection earth structure of the present invention are as follows:
Step 1: composition model case 30, the front panel 31 of model casing 30, three face ring sidings 32 pass through angle steel and screw with bottom plate 33
It is reliably connected each other, assembled open topped model casing 30 is carefully placed on the pedestal 14 of reaction frame 10, adjust
It touches model casing 30 and does not occur to be obviously displaced and be using the card slot stent molding box 30 on pedestal 14 in the position of good model casing 30
Preferably.
Step 2: shingle nail 34 is placed in model casing 30, it is close to connection with front panel 31 by movable bolt 36, draws
Muscle 35 is uniformly arranged on shingle nail 34 layer by layer, and with 34 reliable bond of shingle nail and smooth horizontal tensioning, have lacing wire 35 and fill
The pulling force divided.To layering landfill filler in model casing 30, per 0.05-0.2m a height of layer by layer, smooth lacing wire 35 is simultaneously straightened, and every
According to the embedding reinforcement ring 20 for pasting resistance strain gage 40 of layer after layer filler is smooth, then the landfill of upper layer filler is carried out, makes filler
Top surface is filled to design altitude face.
For lower part several layers filler, the filler Middle face after its is smooth excavates several radiuses arranged in parallel and is
The circular groove of 0.25m, for top several layers filler, the filler Middle face after its is smooth excavates several radiuses arranged in parallel
For the circular groove of 0.35m, it will be apparent that, the circular groove number of top filler setting is less than the circular groove number of lower part filler setting.Circular groove depth is omited
It is deeper than the height of reinforcement ring 20, furrow width is slightly wider than the thickness of reinforcement ring 20, is preferred can just put down reinforcement ring 20.The tool of filler
The design parameters such as the body number of plies, the specification of circular groove number, reinforcement ring 20, are determined according to the actual situation on site by testing crew.
If different fillers need to be filled, filler is flattened after filling to model casing predeterminated position and fixes demixing plate by filler
37, it is horizontal positioned as far as possible that pressing demixing plate 37 makes it, then changes and fill out another filler and continue to fill, and filled out filler is by specific experiment need
Depending on asking.It repeats the above process, fills filler top surface to design altitude face, generally, filler top surface is filled to shingle nail 34
1cm or so under top level.
Step 3: using filler in solid hammer compacting case, measurement compacting effect preferably removes front panel 31 afterwards, constitutes reinforcement
The experimental model of soil structure.
It need to be handled with care when removing front panel 31, first the careful movable bolt 36 released on cabinet, then front panel 31 is whole
Body removes, and stands 1min, observes earth structure, if can carry out next step without husky phenomenon is leaked.If there is leakage sand or reinforced earth
Structure large area collapses phenomenon, repeats step 2-step 3, until constituting the experimental model of stable earth structure.
Step 4: controlling pressurizing device 90 in earth structure by controller 50 after earth structure is stablized
Reinforcement ring 20 applies different grades of pressure, and controller 50 is controllable to apply stressed size, is loaded from as low as big.If needing
Operating condition when simulated rainfall can start rainwater simulator 60, to earth structure simulated rainfall.Rainwater simulator 60 passes through
External water pipe supplies water, and controller 50 adjusts the size of Simulated rainfall, and the water in final case is discharged by discharge outlet 38.
Step 5: detecting the strain variation situation of synthesis reinforcement ring 20 by resistance strain gauge and recording: in pressure process
In, resistance strain gauge real-time display synthesizes the strained situation of reinforcement ring 20, strains spy to it in the case where being further applied load repeatedly
Sign is recorded, and studies strain characteristics of the reinforcement ring 20 in earth structure with this.In the case that different fillers are added in comparison
The strain variation situation of reinforcement ring 20 simultaneously records, and can do comparative test to the strain of reinforcement ring 20 of different fillers, examine reinforcement ring
For the adaptability of variety classes filler.
Step 6: dismantling and cleaning device: after the completion of test, pressurizing device 90 and Simulated rainwater device 10 are closed, etc.
It is discharged to rainwater in case from discharge outlet 38, then the filler in model casing 30 is rooted out and stored.After confirming nothing left sand, model is removed
Case 30 and wiped clean, are stored after draining away the water.
The long service life of apparatus of the present invention has extensively in terms of reinforcement ring strain in detecting different filler earth structures
Wealthy application prospect.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
Ground is described in detail, it should be understood that being not used to limit this hair the foregoing is merely a specific embodiment of the invention
Bright protection scope.Oilpaper/film fixed form of above-described embodiment is suitble to other to generate the device or equipment of drop glue, all at this
Within the spirit and principle of invention, any modification, equivalent substitution, improvement and etc. done should be included in protection model of the invention
Within enclosing.
Claims (10)
1. the experimental provision of reinforcement ring strain in a kind of detection earth structure, it is characterised in that: it includes reaction frame (10), mould
Molding box (30), reinforcement ring (20), resistance strain gauge, controller (50), rainwater simulator (60) and pressurizing device (90)；
The reaction frame (10) includes supporting beam (11), left side arm (12), right arm (13), pedestal (14), the left side arm
(12), right arm (13) separate from accumbency supporting beam (11) two sides and it is vertical with the supporting beam (11) be connected, bottom point
Not vertical with pedestal (14) to be connected, the model casing (30) is arranged in the underface of supporting beam (11), the model casing (30)
Bottom is flexibly connected with pedestal (14)；
The model casing (30) is the cabinet of open topped, in carrying shingle nail (34), lacing wire (35), filler and being embedded in fill out
Reinforcement ring (20) in material, the shingle nail (34) are adjacent to and are flexibly connected with the front side wall of model casing, and the lacing wire (35) is equal
Even distribution is pasted on shingle nail (34) layer by layer and smooth horizontal tensioning, the layering landfill filler in the model casing (30),
Middle part after every layer of filler is smooth fills several reinforcement rings (20) arranged in parallel, the reinforcement ring (20) and lacing wire according to layer
(35) it is alternately arranged, is distributed in different packing layers, and from below to up, the reinforcement ring (20) and lacing wire (35) are in divide from small to large
Cloth, the shingle nail (34), lacing wire (35), filler and the reinforcement ring (20) being embedded in filler form reinforced earth knot after tamping
Structure；
Be symmetrical arranged at least two panels resistance strain gage (40) in the middle part of reinforcement ring (20) outer wall, the resistance strain gage (40) with
Resistance strain gauge is connected；
The central fit beneath of the supporting beam (11) has pressurizing device (90), and the pressurizing device (90) is in the controller
(50) pressure is applied to the earth structure for removing model casing (30) under controlling；
The down either side of the supporting beam (11) is equipped with several rainwater simulators (60), the rainwater simulator (60)
It works under the controller (50) control.
2. experimental provision according to claim 1, it is characterised in that: further include several layerings in the model casing (30)
Plate (37), the demixing plate (37) is horizontally disposed, with the model casing (30) side walls upper and lower translation.
3. experimental provision according to claim 2, it is characterised in that: the demixing plate (37) is arranged in the middle part of model casing.
4. experimental provision according to claim 1, it is characterised in that: the model casing (30) includes front panel (31), three
Face ring siding (32), bottom plate (33), movable bolt (36), discharge outlet (38), the front panel (31), three face ring sidings (32) with
Bottom plate (33) is connected each other, and the shingle nail (34) is bonded setting, the draining by movable bolt (36) with front panel (31)
Bottom of mouth (38) setting in ring wall plate (32).
5. experimental provision according to claim 1, it is characterised in that: the open topped of the model casing (30) in rectangle,
Arch or circle.
6. experimental provision according to claim 1, it is characterised in that: the pressurizing device (90) includes hydraulic jack
(91) and pressing plate (93), the pressing plate (93) are horizontally fixed on the bottom of hydraulic jack (91).
7. the experimental method of the experimental provision of reinforcement ring strain in a kind of detection earth structure, it is characterised in that: including following
Step:
Step 1: composition model case (30), the front panel (31) of model casing (30), three face ring sidings (32) pass through with bottom plate (33)
Angle steel and screw are reliably connected each other, and assembled open topped model casing (30) is carefully placed at reaction frame (10)
On pedestal (14), the position of model casing (30) is adjusted, using the card slot stent molding box (30) on pedestal (14), touches model
Case (30), which does not occur to be obviously displaced, to be advisable；
Step 2: shingle nail (34) is placed in model casing (30), it is close to connect with front panel (31) by movable bolt (36)
Connect, lacing wire (35) is uniformly arranged on shingle nail (34) layer by layer, and with shingle nail (34) reliable bond and smooth horizontal tensioning, it is right
Layering landfill filler in model casing (30), and the middle part after every layer of filler is smooth pastes resistance strain gage according to layer is embedding in parallel
(40) reinforcement ring (20), fills filler top surface to design altitude face；
Step 3: using filler in solid hammer compacting case, measurement compacting effect preferably removes front panel (31) afterwards, constitutes reinforced earth
The experimental model of structure；
Step 4: different grades of pressure is applied to earth structure by controller (50) control pressurizing device (90), it is necessary
When can start rainwater simulator (60)；
Step 5: by resistance strain gauge detection reinforcement ring (20) strain variation situation under pressurized condition and recording；
Step 6: disassembling and cleaning above-mentioned experimental provision.
8. experimental method according to claim 7, it is characterised in that: in step 2, the reinforcement ring (20) is placed in ditch depth
It is deeper than the height of reinforcement ring (20), in the circular groove for the thickness that furrow width is wider than reinforcement ring (20), the circular groove excavates smooth in every layer
Filler Middle face afterwards.
9. experimental method according to claim 8, it is characterised in that: in step 2, if different fillers, filler need to be filled
Landfill by filler to flattening after model casing predeterminated position and fix demixing plate (37), then changes and fill out another filler and continue to fill.
10. experimental method according to any one of claims 7 to 9, it is characterised in that: in step 3, remove front panel
(31) it need to be handled with care, first the careful movable bolt (36) released on cabinet, then front panel (31) is integrally removed, stand when
1min observes earth structure, if there is sand leakage or earth structure large area collapses phenomenon, repeats step 2-step 3, directly
To the experimental model for constituting stable earth structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910417233.4A CN110186369B (en) | 2019-05-20 | 2019-05-20 | Experimental device and method for detecting strain of reinforced ring in reinforced soil structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910417233.4A CN110186369B (en) | 2019-05-20 | 2019-05-20 | Experimental device and method for detecting strain of reinforced ring in reinforced soil structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110186369A true CN110186369A (en) | 2019-08-30 |
| CN110186369B CN110186369B (en) | 2021-04-13 |
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ID=67716838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910417233.4A Active CN110186369B (en) | 2019-05-20 | 2019-05-20 | Experimental device and method for detecting strain of reinforced ring in reinforced soil structure |
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