CN104975621B - A kind of many anchored end retaining wall indoor model test device and test method - Google Patents
A kind of many anchored end retaining wall indoor model test device and test method Download PDFInfo
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Abstract
The invention provides a kind of many anchored end retaining wall indoor model test device and test method, including being filled with the model groove simulating the soil body, described model groove includes base, side plate and cantilevered retaining wall；The front end of described base is hinged with the base of described retaining wall, and other three limits of described base are fixing with the bottom of described side plate to be connected；The inner side of described retaining wall is provided with the anchor cable system anchored with the described soil body, and the outside of described retaining wall is provided with and the prestressing force loading system of described anchor cable system mating reaction；Described retaining wall is provided with the hole passed for described anchor cable system；It is provided with monitoring system with described anchor cable system on described retaining wall；Described prestressing force loading system, to described anchor cable system Shi Hanzhang, monitors the loss of prestress process of described many anchored end retaining wall by described detecting system.The present invention may be used for the experimental study under different tests working condition of many anchored end retaining wall.Mould processing is convenient, can reuse.
Description
Technical field
The present invention relates to road engineering, railway engineering, Geotechnical Engineering field, be specifically related to many anchored end retaining wall indoor
Model test apparatus and test method thereof.
Background technology
Along with carrying forward vigorously of China's infrastructure construction, land resource is the shortest, and retaining wall structure is because of its superior making
Being widely used in the middle of infrastructure project by performance, along with the development of retaining structure technology, retaining wall structure form is maked rapid progress,
Design concept is also constantly developing optimization.Many anchored end retaining wall is for reducing retaining wall self occupation of land, improving its bearing capacity
And with a kind of new light-type block wall grown up in the recent period.But engineering circles is about many anchored end retaining wall force-mechanism at present
Correlational study is relatively fewer, and research is concentrated mainly on numerical simulation and on-the-spot test aspect, laboratory test aspect also almost sky
In vain.
China's CN 103233486 B patent of invention discloses a kind of anchor Rods In Tied Double Retaining Walls model test apparatus and test method,
But this invention designs just for anchor Rods In Tied Double Retaining Walls, experiment cannot be completed for this invention of many anchored end retaining wall and want
Asking, its prestressing force loading equipemtn also can be only done the test of single anchored end retaining wall.
China's CN 104196064 A patent of invention discloses a kind of retaining wall buckling form assay device and installation, test
Method, but this invention carries out laboratory test just for the unstability situation of retaining wall can not meet many anchored end retaining wall
Test requirements document.
, there is following shortcoming in visible, current retaining wall indoor model test device:
The most current retaining wall indoor model can only meet anchor Rods In Tied Double Retaining Walls indoor model test and simulate general retaining wall
Unstable failure situation, and the most do not dabble for the retaining wall indoor model that many anchored end retaining wall is current.
The prestressing force charger of the most current retaining wall indoor model test device is just for single anchored end or to pull-type
Retaining wall, the prestressing force loading procedure of many anchored end retaining wall can't be simulated.
The prestressing force charger of the most current retaining wall indoor model test device can't simulate many anchored end retaining wall
Loss of prestress process.
Summary of the invention
For solving deficiencies of the prior art, the present invention provides a kind of many anchored end retaining wall indoor model test device
And test method.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of many anchored end retaining wall indoor model test device, including being filled with the model groove simulating the soil body, described model groove
Including base, side plate and cantilevered retaining wall；The front end of described base is hinged with the base of described retaining wall, described base
The bottom of other three limits and described side plate fixing be connected；The inner side of described retaining wall is provided with the anchor cable system anchored with the described soil body
System, the outside of described retaining wall is provided with and the prestressing force loading system of described anchor cable system mating reaction；Set on described retaining wall
There is the hole passed for described anchor cable system；It is provided with monitoring system with described anchor cable system on described retaining wall；Described pre-should
Force loading system, to described anchor cable system Shi Hanzhang, monitors described many anchored end retaining wall room by described monitoring system
Relevant parameter in interior process of the test.
Hinged with the base of cantilever retaining wall by the front end of base, simulate cantilever retaining wall, utilize the articulated manner can
To allow retaining wall around base rotation, effective simulation cantilever retaining wall is by the placement property after soil pressure.By with anchor cable
The prestressing force charger that system connects can simulate the loss of prestress process of anchored end retaining wall.
Described anchor cable system includes: several steel plates being arranged in order before and after simulation anchored end, is connected with described Interal fixation
The some anchor cables simulated by reinforcing bar, the other end of described anchor cable is connected with described prestressing force loading system.
Simulate by arranging multiple steel plate there is the retaining wall of many anchored end, with this simulate that many anchored end are had in order to
Increase prestressing force value, reduce the effect of loss of prestress.By adjusting the distance between each steel plate, anchoring can be simulated
Hold different field conditions.
Described steel plate is provided with hole, and described hole passes through for the anchor cable being connected with steel plate other described.
Steel plate is provided with hole, the cross influence between each steel plate and anchor cable can be avoided, improve the accuracy of simulation.
Described prestressing force loading system includes fixing the horizontal reaction frame being connected with described retaining wall, the two of described horizontal reaction frame
Side is provided with guide rail, and described horizontal reaction frame both sides are connected by described guide rail is vertical with some arm-ties, if described some arm-ties and
Dry root anchor cable one_to_one corresponding, and fixing connection；Come to corresponding anchor cable Shi Hanzhang by each arm-tie of stretch-draw, and by solid
Determine device to be fixed with described guide rail by described arm-tie, to lock prestressing force.
By arranging horizontal reaction frame and the arm-tie being attached thereto, fix the other end of anchor cable, instead of the work of tradition anchor head
With, the stretch-draw making simulation anchor cable is convenient feasible.Arm-tie and anchor cable one_to_one corresponding, can simulate being subject to of each anchored end respectively
Power situation.
When carrying out prestressing force loading or loss of prestress, the inside of described horizontal reaction frame, it is provided with jack, described very heavy
Top is connected with the described arm-tie needing stretch-draw by hollow bearing, described jack utilizes and the thrust of described retaining wall come for
The described anchor cable that described arm-tie connects provides stretching force.
Carry out Shi Hanzhang by arranging jack and hollow bearing, make prestressed loading simulation more convenient.Use
This ingehious design of hollow bearing of jack and auxiliary work, it is possible to achieve the prestressing force simulating many anchored end retaining wall loads
Process and loss of prestress process.
Described hollow bearing is needing between the described arm-tie of stretch-draw and described jack, including two hollow cushion blocks and connection
The spacer bar of two described hollow cushion blocks；When carrying out prestressing force loading, a described hollow cushion block and the arm-tie needing stretch-draw
Contact, another described hollow cushion block contacts connection with described jack.
The structure design of hollow bearing, can conveniently carry out prestressed loading and loss；Mould processing is convenient, it is easy to dismounting
And carrying, can reuse.
Described prestressing force loading system also include between described retaining wall and described hollow bearing for measuring described anchor cable
Prestressed rope meter.
Rope meter may be located at any one forced position between hollow bearing and retaining wall, and the pressure shown by rope meter is
The prestress value of tested anchor cable.By rope meter, the prestressed size born by stretch-draw anchor, Jin Erke can be measured
With control the prestress value of survey anchor cable.
Described prestressing force loading system also includes anchor head, and described anchor head is between described retaining wall and described jack, described
The fixing backing plate that connects of anchor head, and contacted with described retaining wall by described backing plate；If described anchor head and described backing plate are provided with
Dry the hole passed for described anchor cable.
Anchor head is set and can play the effect in fixing anchor cable direction.
Described monitoring system includes Monitoring on Earth Pressure device, system for monitoring displacement and anchor cable monitor for stress；Described soil pressure
Monitoring device includes the soil pressure cell being vertically embedded in described retaining walls back；Described system for monitoring displacement includes being arranged on institute
State the dial gauge outside retaining wall；Described anchor cable monitor for stress includes the foil gauge being arranged on described anchor cable.
Can meet under different tests requirement by arranging detecting system, the measurement requirement to different parameters.
Two panels in described side plate are assembled by steelframe splicing；It is provided with safety glass inside described steelframe.
The test method of a kind of many anchored end retaining wall indoor model test device, comprises the following steps:
Step 1: according to on-the-spot entity and the size of indoor model and stressing conditions contrast, determine a suitable likelihood ratio,
And the size of each parts of indoor model is determined according to the likelihood ratio；
Step 2: install model groove and Monitoring on Earth Pressure device, and at mounted model slot packing and be compacted；
Step 3: paste foil gauge on anchor cable and install anchor cable, anchor cable system uses the mode of anti-excavation to install when mounted,
And prestressed loading system；System for monitoring displacement is installed outside retaining wall；
Step 4: operate accordingly according to test requirements document, carries out prestressing force loading or loss of prestress, and observation is corresponding surveys
Amount data.
In step 4, when carrying out prestressing force and loading, some anchor cables are carried out respectively stretch-draw, during stretch-draw, according to distance gear soil
Wall order from far near, successively each anchor cable of stretch-draw.
In step 4, the process carrying out prestressing force loading or loss of prestress includes: install hollow bearing, one of sky
Heart cushion block withstands on one side of rope meter, and another block hollow cushion block withstands on the arm-tie needing stretch-draw, unclamps fixing device；
Adjusting the length of jack, jack heads on hollow cushion block and changes position, and then changes by the position of the arm-tie of stretch-draw, works as anchor
When rope meter reaches setting value, locking and fixing device.
The invention have the benefit that
1. the present invention proposes test model and the test method of a kind of many anchored end retaining wall force-mechanism, can be used for anchoring more
The experimental study under different tests working condition of the terminal block cob wall.
2. the present invention proposes a kind of indoor easily to the device of many anchored end retaining wall Shi Hanzhang.
3. the present invention proposes a kind of indoor and utilizes the reality of hollow bearing simulation many anchored end retaining wall loss of prestress easily
Experiment device.
4. can control the distance between prestressed size and the anchored end born on retaining wall, in order to simulate different anchor
Fixed end spacing and the field condition of different stress distribution.
5. mould processing is convenient, it is easy to dismantles and carries, can reuse.
6. can be that research many anchored end retaining wall force-mechanism at different conditions provides technical support further, can take off
Show many anchored end retaining wall Wall back pressure, prestressd anchor cable size, anchored end distance etc. between relation.
Accompanying drawing explanation
Fig. 1 is many anchored end retaining wall force-mechanism assay device assembling figure；
Fig. 2 is many anchored end retaining wall force-mechanism assay device anchor cable system schematic diagram；
Fig. 3 and Fig. 4 is many anchored end retaining wall force-mechanism assay device prestressing force loading system schematic diagram；
In figure: 1. base, 2. side plate, 3. prestressing force loading system, 4. anchor cable system, 5. cantilever retaining wall, 6. anchor cable,
7. anchored end, 8. punching jack, 9. rope meter, 10. anchor head, 11. backing plates, 12. arm-ties, 13. guide rails, 14. is the most anti-
Power frame, 15 fix bolt, 16 hollow bearings, 17 hollow cushion blocks, 18 spacer bars.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
A kind of many anchored end retaining wall force-mechanism model test apparatus, loads system including model groove, anchor cable system 4, prestressing force
System 3 monitoring system.
Model groove includes the base 1 being arranged on bottom, and the surrounding at base 1 is separately installed with side plate 2 and cantilever retaining wall
5.Anchor cable system 4 includes anchor cable 6 and anchored end 7, and anchored end 7 uses Q235 steel plate thick for 2.5cm and anchor cable 6 to pass through spiral shell
Tether and connect.Prestressing force loading system 3 includes punching jack 8, rope meter 9, anchor head 10, backing plate 11, arm-tie 12, leads
Rail 13, horizontal reaction frame 14, fixing bolt 15 and hollow bearing 16.
Described base 1 is to use Q235 steel plate thick for 2cm to interlock to be welded, in order to keep stablizing of model.
Described side plate uses steelframe splicing to assemble, and is covered with the thick organic safety glass of one piece of 2cm, side inside steelframe
The Main Function of plate is used to block the soil of both sides, side plate and cantilever retaining wall 5 journey 90 degree, and passes through bolt with base 1
It is connected.
Described cantilever retaining wall 5 is made up of the Q235 that 2.5cm is thick, including shingle nail, toe of wall, wall heel composition, cantilevered
Retaining wall 5 and base 1 are hinged by rotating shaft, and hole so that anchor cable 6 passes on diverse location on the wall.
Described anchor cable system 4 includes 4 anchored end simulated by steel plate 7, simulated by reinforcing bar anchor cable 6, bolt form,
Four anchor cables 6 are by the boring on cantilever retaining wall 5, and are placed through the backing plate 11 outside cantilever retaining wall 5 and anchor
10, it is connected with the arm-tie 12 in prestressing force loading system 3.
Described prestressing force loading system 3 is arranged on outside cantilever retaining wall 5, in order to anchor cable system 4 Shi Hanzhang.
By anchor head 10, backing plate 11, punching jack 8, rope meter, arm-tie 12, guide rail 13, horizontal reaction frame 14, fixing spiral shell
Bolt 15, hollow bearing 16 form, and are connected with anchor cable system 4 by arm-tie 12, and anchor head 10 is welded on backing plate 11,
Being connected by the way of welding between backing plate 11 with horizontal reaction frame 14 and guide rail 13, arm-tie 12 and anchor cable 6 pass through bolt
Connect.
Anchor head 10 is a cylinder having four holes, welds together with backing plate 11, and anchor cable 6 is played by described anchor head 10
Elicitation effect.Anchor cable in the soil body is identical, by the anchor cable 6 outside cantilever retaining wall 5 with outside anchor cable stress size
Shi Hanzhang is so that anchored end 7 stress in the soil body.
Arm-tie 12 is connected by guide rail 13 with horizontal reaction frame 14, and detects prestressed size by rope meter 9.Anchor
Rope meter wraps in outside four anchor cables 6, contacts connection with jack and arm-tie 12.When prestress application is complete by fixing spiral shell
Bolt 15 is fixed.When needs carry out prestressed hierarchical loading or prestressed loss, in advance hollow bearing 16 is installed
On prestressing force loading equipemtn.Hollow bearing 16 includes two pieces of hollow cushion blocks 17 and connects the support of two pieces of hollow cushion blocks 17
Reinforcing bar 18, spacer bar 18 contacts connection with hollow cushion block 17 by the hole on hollow cushion block 17.
Described monitoring system includes and Monitoring on Earth Pressure device, system for monitoring displacement and anchor cable monitor for stress.
Described Monitoring on Earth Pressure device includes the soil pressure cell being vertically embedded in cantilever retaining wall 5 wall back, to measure soil pressure
Power.Described system for monitoring displacement includes dial gauge, to monitor the lateral displacement of cantilever retaining wall 5.Described anchor cable should
Power monitoring device is the foil gauge being pasted onto on anchor cable 6, to monitor the stress level on anchor cable 6.
During Shi Hanzhang, respectively four anchor cables 6 being carried out stretch-draw respectively, during stretch-draw, pretensioning is away from cantilever retaining wall 5
Anchor cable 6, the remaining anchor cable of stretch-draw 6 successively.Extrude arm-tie 12 by punching jack 8 during stretch-draw and apply pre-to anchor cable 6
Stress.
Arm-tie 12 is extruded to anchor cable 6 Shi Hanzhang, arm-tie 12 and horizontal reaction frame 14 by punching jack 8 during stretch-draw
Connected by guide rail 13, and detect prestressed size by rope meter 9.When prestress application is complete by fixing spiral shell
Bolt 15 is fixed.When needs carry out prestressed hierarchical loading or prestressed loss, in advance hollow bearing 16 is installed
On prestressing force loading equipemtn.Hollow bearing 16 includes two pieces of hollow cushion blocks 17 and connects the support of two pieces of hollow cushion blocks 17
Reinforcing bar 18, spacer bar 18 contacts connection with hollow cushion block 17 by the hole on hollow cushion block 17.Hollow bearing 16 makes
Used time, first one of hollow cushion block 17 being withstood on rope meter 9, another block hollow cushion block 17 withstands on and needs stretch-draw
One side of arm-tie, adjust the length of jack, jack heads on hollow cushion block and changes position, and then changes drawing by stretch-draw
The position of plate, and change length and the prestressing force of tested anchor cable 6.
The height of hollow bearing can be adjusted in use by selecting the spacer bar 18 of different length.
The model preparation step of the present invention be presented herein below:
Step 1: according to on-the-spot entity and the size of indoor model and stressing conditions contrast, determine a suitable likelihood ratio,
And the size of each parts of indoor model is determined according to the likelihood ratio；
Step 2: mounting seat 1；
Step 3: install side plate；
Step 4: install cantilever retaining wall 5, uses AB glue that soil pressure cell is pasted onto the differing heights of the wall back of the body simultaneously；
Step 5: filler being compacted in cantilever retaining wall 5；
Step 6: paste foil gauge install anchor cable 6 on anchor cable 6, uses the mode of anti-excavation during the installation of anchor cable system 4
Install, and prestressed loading system 3；
Step 7: install system for monitoring displacement.
In step 1, the determination method of similarity relation is as follows:
The physical quantity relevant to this test mainly has
In formula: L: physical dimension；ξ: strain；δ: displacement；U: Poisson's ratio；γ: material severe；C: cohesive strength；Angle of friction；ES: elastic modelling quantity；σ: stress.
Geometric similarity constant: CL=LP/Lm；Displacement affinity constant: Cδ=δP/δm
Stress similitude constant: Cσ=σP/σm；Strain ratio: Cξ=ξP/ξm
Severe affinity constant: Cγ=γP/γm；Play mould affinity constant: CE=(ES)P/(ES)m
Poisson's ratio affinity constant: Cμ=uP/um；Cohesive strength affinity constant: CC=CP/Cm
Internal friction angle affinity constant:
In formula: footmark p presentation-entity, footmark m represents model.Particularly as follows:
LP: entity physical dimension；Lm: model geometric size；δP: entity displacement；δm: model displacement；σP: entity
Stress, σm: model stress；ξP: entity strains；ξm: model strains；uP: entity Poisson's ratio；um；Model Poisson's ratio；
γP: entity severe γm: model severe；CP；Entity cohesive strength；Cm: model cohesive strength；Entity angle of friction；
Model angle of friction (ES)P: entity elastic modelling quantity；(ES)m: model elastic modelling quantity.
Can be as if stress, strain, displacement to be substituted into respectively constitutional balance equation, geometry equilibrium equation and physical equilibrium equation
Lower similarity criterion:
CLCξ=CδCξCE=Cσ
And the similar scale of all dimensionless physical quantitys (such as strain, internal friction angle, coefficient of friction, Poisson's ratio etc.) is equal to 1,
That is:
Cξ=1, Cf=1, Cu=1,
In model test herein, use sand as backfill material, then Cr=1；Subordinate's DESIGN OF RETAINING WALLS of entity project is high
Degree is 6m, and for increasing the operability of model test, the volume of test model can not be excessive, simultaneously for the essence of guarantee test
Exactness, takes geometric similarity constant CL=3.75；By equilibrium equation CrCL/Cσ=1 releases stress similitude than chi Cδ=3.75；By
Geometric equation CLCε/Cδ=1 releases displacement similar scale Cδ=3.75.
According to different test requirements documents, corresponding test method is as follows:
1. more than anchored end retaining wall difference stress distribution lower stress mechanism test research
Install retaining wall model, anchor cable system 4 and prestressing force loading system 3 are arranged on retaining wall, as Fig. 4 passes through
Control punching jack 8 and hollow bearing applies different grades of prestressing force to anchor cable 6: hollow bearing is installed, wherein
One piece of hollow cushion block withstands on one side of rope meter, and another block hollow cushion block withstands on the arm-tie needing stretch-draw, unclamps fixing
Device；Adjusting the length of jack, jack heads on hollow cushion block and changes position, and then changes by the position of the arm-tie of stretch-draw,
When rope meter reaches setting value, locking and fixing device；When carrying out prestressing force and loading, carry out respectively some anchor cables 6 opening
Draw, during stretch-draw, according to distance cantilever retaining wall 5 order from far near, successively each anchor cable 6 of stretch-draw.Detection cantilevered
The Wall back pressure of retaining wall 5, anchor cable 6 strain and wall lateral displacement.
2. more than anchored end retaining wall Water Damage force-mechanism experimental study
Install cantilever retaining wall 5 model, and anchor cable system 4 and prestressing force loading system 3 are arranged on cantilevered gear soil
On wall 5, apply certain prestressing force according to the method in 1 to anchor cable 6, water filling in model groove until whole fillers all
It is in saturation and detects now Wall back pressure, anchor cable stress and wall lateral displacement.
3. force-mechanism experimental study during anchored end retaining wall vertical load
Install cantilever retaining wall 5 model, and anchor cable system 4 and prestressing force loading system 3 are arranged on cantilevered gear soil
On wall 5, according to applying certain prestressing force to anchor cable 6 in 1, executed to model slot packing by modes such as sandbag preloadings
Add vertical load, and detect now Wall back pressure, anchor cable stress and wall lateral displacement.
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines, but not to scope
Limiting, one of ordinary skill in the art should be understood that, on the basis of technical scheme, those skilled in the art are not required to
Various amendments that creative work to be paid can be made or deformation are still within protection scope of the present invention.
Claims (8)
1. anchored end retaining wall indoor model test device more than a kind, it is characterised in that: including the model groove being filled with the simulation soil body, described model groove includes base, side plate and cantilevered retaining wall；The front end of described base is hinged with the base of described retaining wall, and other three limits of described base are fixing with the bottom of described side plate to be connected；The inner side of described retaining wall is provided with the anchor cable system anchored with the described soil body, and the outside of described retaining wall is provided with and the prestressing force loading system of described anchor cable system mating reaction；Described retaining wall is provided with the hole passed for described anchor cable system；It is provided with monitoring system with described anchor cable system on described retaining wall；Described prestressing force loading system, to described anchor cable system Shi Hanzhang, monitors the relevant parameter during described many anchored end retaining wall laboratory test by described monitoring system；
Described anchor cable system includes: several steel plates being arranged in order before and after simulation anchored end, the some anchor cables simulated by reinforcing bar being connected with described Interal fixation, the other end of described anchor cable is connected with described prestressing force loading system；Described steel plate is provided with hole, and described hole passes through for the anchor cable being connected with steel plate other described；
Described prestressing force loading system includes fixing the horizontal reaction frame being connected with described retaining wall, the both sides of described horizontal reaction frame are provided with guide rail, described horizontal reaction frame both sides are connected by described guide rail is vertical with some arm-ties, described some arm-ties and some anchor cable one_to_one corresponding, and fixing connection；Come to corresponding anchor cable Shi Hanzhang by each arm-tie of stretch-draw, and by fixing device, described arm-tie is fixed with described guide rail, to lock prestressing force.
One many anchored end retaining wall indoor model test device the most according to claim 1, it is characterized in that: when carrying out prestressing force loading or loss of prestress, the inside of described horizontal reaction frame, it is provided with jack, described jack is connected with the described arm-tie needing stretch-draw by hollow bearing, and described jack utilizes provides stretching force with the thrust of described retaining wall for the described anchor cable being connected with described arm-tie.
One many anchored end retaining wall indoor model test device the most according to claim 2, it is characterized in that: described hollow bearing is needing between the described arm-tie of stretch-draw and described jack, including two hollow cushion blocks and the spacer bar of two described hollow cushion blocks of connection；When carrying out prestressing force loading, a described hollow cushion block contacts with the arm-tie needing stretch-draw, and another described hollow cushion block contacts connection with described jack；Described prestressing force loading system also includes the rope meter for measuring described prestressd anchor cable between described retaining wall and described hollow bearing.
One many anchored end retaining wall indoor model test device the most according to claim 2, it is characterized in that: described prestressing force loading system also includes anchor head, described anchor head is between described retaining wall and described jack, the fixing backing plate that connects of described anchor head, and contacted with described retaining wall by described backing plate；Described anchor head and described backing plate are provided with several holes passed for described anchor cable.
One many anchored end retaining wall indoor model test device the most according to claim 1, it is characterised in that: described monitoring system includes Monitoring on Earth Pressure device, system for monitoring displacement and anchor cable monitor for stress；Described Monitoring on Earth Pressure device includes the soil pressure cell being vertically embedded in described retaining walls back；Described system for monitoring displacement includes being arranged on the dial gauge outside described retaining wall；Described anchor cable monitor for stress includes the foil gauge being arranged on described anchor cable.
6. use the test method of a kind of many anchored end retaining wall indoor model test device as claimed in claim 3, it is characterized in that, comprise the following steps: step 1: according to on-the-spot entity and the size of indoor model and stressing conditions contrast, determine a suitable likelihood ratio, and determine the size of each parts of indoor model according to the likelihood ratio；Step 2: install model groove and Monitoring on Earth Pressure device, and at mounted model slot packing and be compacted；Step 3: paste foil gauge on anchor cable and install anchor cable, anchor cable system uses the mode of anti-excavation to install when mounted, and prestressed loading system；System for monitoring displacement is installed outside retaining wall；Step 4: operate accordingly according to test requirements document, carries out prestressing force loading or loss of prestress, observes corresponding measurement data.
The test method of a kind of many anchored end retaining wall indoor model test device the most according to claim 6, it is characterized in that: in step 4, when carrying out prestressing force and loading, some anchor cables are carried out respectively stretch-draw, during stretch-draw, according to distance retaining wall order from far near, successively each anchor cable of stretch-draw.
The test method of a kind of many anchored end retaining wall indoor model test device the most according to claim 6, it is characterized in that: in step 4, the process carrying out prestressing force loading or loss of prestress includes: install hollow bearing, one of hollow cushion block is withstood on one side of rope meter, another block hollow cushion block withstands on the one side of the arm-tie needing stretch-draw, unclamps fixing device；Adjusting the length of jack, jack heads on hollow cushion block and changes position, and then changes by the position of the arm-tie of stretch-draw, when rope meter reaches setting value, locking and fixing device.
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| CN105890991B (en) * | 2016-04-28 | 2018-08-07 | 中国科学院武汉岩土力学研究所 | Consider the soil pressure relaxation effect test method of Ground crack |
| CN105928794B (en) * | 2016-04-28 | 2018-08-07 | 中国科学院武汉岩土力学研究所 | Built-in soil pressure calculation system |
| CN105954099B (en) * | 2016-04-28 | 2018-08-14 | 中国科学院武汉岩土力学研究所 | Built-in retaining wall type soil pressure seep effect test method |
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| CN110849688B (en) * | 2019-11-29 | 2023-05-16 | 中国石油大学(华东) | Model test device for coupling effect of prestress anchor rod (cable) anchoring force loss and tunnel aging deformation |
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| JPS54125809A (en) * | 1978-03-23 | 1979-09-29 | Shinko Wire Co Ltd | Method of removing system earth anchor construction |
| CN103233486A (en) * | 2013-05-10 | 2013-08-07 | 山东大学 | Testing device and testing method of anchor-tension type retaining wall model |
| CN203768953U (en) * | 2014-03-26 | 2014-08-13 | 西南交通大学 | Support for improving lateral rigidity of reinforced earth retaining wall model test box |
| CN204728374U (en) * | 2015-07-07 | 2015-10-28 | 山东大学 | A kind of many anchored end retaining wall indoor model test device |
-
2015
- 2015-07-07 CN CN201510397633.5A patent/CN104975621B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54125809A (en) * | 1978-03-23 | 1979-09-29 | Shinko Wire Co Ltd | Method of removing system earth anchor construction |
| CN103233486A (en) * | 2013-05-10 | 2013-08-07 | 山东大学 | Testing device and testing method of anchor-tension type retaining wall model |
| CN203768953U (en) * | 2014-03-26 | 2014-08-13 | 西南交通大学 | Support for improving lateral rigidity of reinforced earth retaining wall model test box |
| CN204728374U (en) * | 2015-07-07 | 2015-10-28 | 山东大学 | A kind of many anchored end retaining wall indoor model test device |
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| CN104975621A (en) | 2015-10-14 |
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