CN107354961A - Variation rigidity prestressed anchor Rods In Tied Double Retaining Walls soil arching effect pilot model apparatus and method - Google Patents
Variation rigidity prestressed anchor Rods In Tied Double Retaining Walls soil arching effect pilot model apparatus and method Download PDFInfo
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- CN107354961A CN107354961A CN201710633158.6A CN201710633158A CN107354961A CN 107354961 A CN107354961 A CN 107354961A CN 201710633158 A CN201710633158 A CN 201710633158A CN 107354961 A CN107354961 A CN 107354961A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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Abstract
The invention discloses a kind of variation rigidity prestressed anchor Rods In Tied Double Retaining Walls soil arching effect pilot model apparatus and method, the experimental rig can be by changing the laying form of anchor drawing device, single anchor plate can be used, more anchor plates, anchor cable, to simulate grappling plate type retaining wall, pressure dissipation pattern retaining wall, outstanding anchor formula retaining wall, the unicity result of experiment is avoided, more with convincingness.Devise the rigidity of 4 kinds of barricades.Specially：The first structure is conventional uiform section design, second is to increase rib post on the basis of the first structure design, the sectional dimension of the third wall between the thinned anchor on the basis of second of structure design, for the 4th kind of physical dimension with the third, on-link mode (OLM) becomes be hinged.
Description
Technical field
The invention belongs to field of road, and in particular to a kind of variation rigidity lower prestress anchor Rods In Tied Double Retaining Walls soil arching effect
Pilot model apparatus, including three kinds of forms：Outstanding anchor formula, pressure dispersing type and grappling are board-like.
Background technology
In recent years, raising was saved the area horizontal call in response to country, various regions propose many such as low embankments,
Novel retaining wall, the various technologies such as old material are discarded along the line.Wherein, flexible, construction is convenient, saving due to setting for earth-retaining wall technology
Soil significant effect, the barricade technology group that species is various, with their own characteristics is formd in recent years, such as pressure dispersing type, inter-anchored, sand
The pull-type soil-baffling structure patterns of anchor such as anchor rod type are starched, and good engineering effort is achieved in Practical Project.But to these
Found during barrier wall structure progress field test and model test, the geostatic shield on baffle plate does not meet classical soil simultaneously
Pressure theory, but there occurs significant redistribution phenomenon.Found by analogy pertinent literature, the phenomenon is due to this
A little pull-type barricades of anchor, are acted at anchor point by sidewise restraint, there occurs inhomogeneous deformation under soil lateral pressure, shape after wall
Into obvious soil arching effect, and then change the distribution of soil pressure.This spatial distribution characteristic and dynamic evolution of soil pressure
The presence of phenomenon, following problem can be brought to structure design:(1) according to barricade traditional design method, easily there is anchoring section and match somebody with somebody
Muscle amount is insufficient, and wall and wall body root quantity of reinforcement and excessive phenomenon, cause barrier wall structure design not only dangerous but also uneconomical between anchor；
(2) the segmented Calculating method of earth pressure proposed according to Shandong University professor Zhang Hongbo, though safety of structure can be ensured, due to
Do not consider that the loading sharing of soil arch acts on, wall design is overly conservative between anchor, uneconomical；(3) both the above method does not consider soil
The dynamic evolution of pressure, it is impossible to rationally determine barricade least favorable status under loading, cause barrier wall structure design to still suffer from certain peace
Full hidden danger.
The content of the invention
The present invention is the pull-type barricade pattern of more preferable popularization and application anchor, it is necessary to right for overcome the deficiencies in the prior art
Its stress characteristic, deformation characteristic and soil pressure distribution regular are furtherd investigate, and disclose wall-soil interaction mechanism, dissect three
Soil arching effect genesis mechanism and dynamic evolution are tieed up, builds soil pressure spatial distribution model, optimizes barricade design method, is formed
Pressure dispersing type retaining wall theoretical system；It is applied to different-stiffness the invention provides one kind to draw with displacement model lower prestress anchor
Formula barricade three-dimensional soil arching effect model test apparatus；The device can be used for simulating basic anchor Rods In Tied Double Retaining Walls structure, such as grappling
Plate type retaining wall, pressure dissipation pattern retaining wall, outstanding anchor formula retaining wall.
The technical solution adopted by the present invention is as follows：
A kind of variation rigidity lower prestress hangs anchor formula retaining wall soil arching effect pilot model apparatus；Including a framework, in institute
Filler is filled with the framework stated；The top of described framework is provided with reaction frame, and the bottom of described reaction frame is provided with jack,
The vertical force that described jack applies uniformly arrives load plate II by a stress spread support, and described load plate II is to frame
Filler in frame implements power；Barricade is provided with described framework, described barricade connects pre- by a horizontal anchor pole
An anchor plate being embedded in filler；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；
Described barricade metope is to set the embedding earth pressure gauge in interval, foil gauge, dial gauge；Pressure is set between jack and reaction frame
Force snesor.
A kind of variation rigidity lower prestress pressure dispersing type barricade soil arching effect pilot model apparatus, including a framework,
Filler is filled with described framework；The top of described framework is provided with reaction frame, and the bottom of described reaction frame is provided with very heavy
Top, the vertical force that described jack applies uniformly arrive load plate II, described load plate II by a stress spread support
Power is implemented to the filler in framework；Barricade is provided with described framework, described barricade is straight by a horizontal anchor pole
It is connected in succession in the side wall of framework；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；Institute
The barricade metope stated is to set the embedding earth pressure gauge in interval, foil gauge, dial gauge；Pressure is set between jack and reaction frame
Sensor.
A kind of board-like barricade model test apparatus of variation rigidity lower prestress grappling, including a framework, in described framework
It is interior to be filled with filler；The top of described framework is provided with reaction frame, and the bottom of described reaction frame is provided with jack, and described thousand
The vertical force that jin top applies uniformly arrives load plate II by a stress spread support, and described load plate II is to filling out in framework
Material implements power；Barricade is provided with described framework, described barricade is directly connected to multiple anchors by a horizontal anchor pole
Fixed board；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；In described barricade metope to set
Surely embedding earth pressure gauge, foil gauge, dial gauge are spaced；Pressure sensor is set between jack and reaction frame.
Further, four side walls of described framework include 3 face steelframes and 1 piece of poly (methyl methacrylate) plate assembles, wherein
There is steelframe reserved cavity in side conveniently to enter people's test operation；The bottom of framework is steel base.
Further, 0.5m hole, other parts and adjacent both sides are reserved in one of side wall of described framework
Side wall rigid connection.
Further, described poly (methyl methacrylate) plate, above side and left side and right side steelframe rigid connection are arranged in.
Further, described anchor cable is connected by anchor bolt with anchor plate, and outside is fixed by anchorage.
Further, described pressure sensor is placed between reaction frame and jack by cushion block.
Further, anchor plate number is determined according to barricade type on each anchoring system.
Further, the reaction frame is welded to form by I-steel assembly, and overall is in inverted U, and both ends pass through bolt
It is connected with reaction frame fixing device.
Further, the barricade includes wall body and wall bottom plate；Specific form includes four kinds：
The first structure designs for wall body uiform section, is welded between wall body and wall bottom plate；
Second is to increase rib post in wall body, is welded between wall body and wall bottom plate；
The third is the sectional dimension that wall body is thinned, and is welded between wall body and wall bottom plate；
4th kind of physical dimension is welded between wall body and wall bottom plate with the third and becomes be hinged.
The barricade is made up of wall body and wall bottom plate, wall rib, and wherein wall body and wall bottom plate opening position connected mode are rigidity
Connection and be hinged two ways, wall bottom plate are simulated using two baffle plates, its absolute rigidity and up and down it is removable, width is adjustable, use
Section is anchored in simulation；Barricade wall body is simulated using a baffle plate, and its rigidity, width, upper-lower position are adjustable, for simulating anchor
Between wall.
Further, earth pressure gauge is arranged on the size that wall body is the soil pressure received for measuring wall body；
It is the size for measuring the horizontal displacement of wall body that dial gauge, which is arranged on wall body,；
Strain gauge adhesion in wall body is experienced the deformation after power for detecting wall.
The specific test operation of the present invention, including with several steps：
1) the barricade metope in model groove is pressed with setting the embedding earth pressure gauge in interval, dial gauge and foil gauge, quartz sand
Setting compactness point multilayer is filled to model groove；
It is 2) counter to excavate pre-buried anchor cable and anchor plate when filling the soil body highly more than the height of the anchor system of lowest part,
It is bolted anchor cable, anchor plate and barricade；The anchor system of other height is also handled with identical method；
3) when whole model groove fills full quartz sand, compacting leveling top surface, big load plate, stress expansion are laid successively in top surface
Dissipate support, small load plate, jack, pressure sensor, reaction frame；
4) a kind of barrier wall structure form is selected, from a kind of load mode, monitoring soil pressure situation of change, quartz sand particle
Misalignment and lateral diaphragm wall displacement situation.
5) 4 kinds of different barrier wall structure forms are designed to simulate the change of barricade rigidity, load mode is included without prestressing force shape
Vertical loading under state, the ratio for having vertical loading under (containing basic, normal, high) pre-stressed state, prestressing force and vertical load add
Three kinds of modes such as load, for simulating influence of the different stress paths to soil pressure redistribution；
6) change barrier wall structure form and load mode repeat step 1-5, complete experimental implementation；
The present invention has the beneficial effect that：
1) present invention proposes the New device structures and its application method that one kind probes into " three-dimensional soil arching effect ", overcomes
The deficiency that existing " three-dimensional soil arching effect " laboratory test is probed into.
2) experimental rig can such as be schemed by changing the laying form of anchor drawing device, single anchor plate, more grapplings can be used
Plate, anchor cable, to simulate grappling plate type retaining wall, pressure dissipation pattern retaining wall, outstanding anchor formula retaining wall, avoid the single of experiment
Property result, more with convincingness.
3) side of model of the present invention uses poly (methyl methacrylate) plate, and filler uses suprasil sand, and poly (methyl methacrylate) plate side makes
Monitored with high-speed camera.
4) model of the present invention cleverly devises the rigidity of 4 kinds of barricades by way of combination baffle and rib post.Specially：
The first structure is conventional uiform section design, and second is to increase rib post on the basis of the first structure design, the third
For on the basis of second of structure design be thinned anchor between wall sectional dimension, the 4th kind of physical dimension with the third, side of link
Formula becomes be hinged.
5) load mode of model of the present invention is to apply upper load by way of setting up reaction beam on model casing top,
Load mode includes without the vertical loading under pre-stressed state, has vertical loading under (containing basic, normal, high) pre-stressed state, pre-
Three kinds of modes such as proportional loading of stress and vertical load.As illustrated, earth pressure gauge and foil gauge are laid with baffle plate, so as to
The change of the soil pressure in the presence of upper load, the displacement for the suprasil sand that cooperation high-speed camera is shot are monitored at any time
To disclose the genesis mechanism of three-dimensional soil arching effect and pattern be present.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
The prestressing force that Fig. 1 is the present invention hangs anchor formula retaining wall model test apparatus front view；
Fig. 2 is the prestressed pressure decentralized barricade model test apparatus front view of the present invention；
Fig. 3 is the prestressed anchor fixed board formula barricade model test apparatus front view of the present invention；
Fig. 4 is the prestressed anchor Rods In Tied Double Retaining Walls model test apparatus side view of the present invention；
Fig. 5 is the change of barricade section rigidity and the connected mode of the present invention (first 3 kinds are rigid connection, and the 4th kind is be hinged)；
Fig. 6 is the Earth Pressure of Retaining Wall and strain monitoring layout drawing of the present invention；
In figure：1 pressure sensor, 2 reaction frames, 3 load plates, 4 anchor plates, 5 anchor poles, 6 barricades, 7 anchorages, 8 stress spreads
Support, 9 anchor heads, 10 barricade wall ribs, 11 jack, 12 frameworks, 13 steel plates.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe 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 singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, the spatial distribution characteristic and dynamic evolution phenomenon that soil pressure in the prior art be present
Presence, following problem can be brought to structure design:(1) according to barricade traditional design method, easily there is anchoring sectional reinforcement amount
Deficiency, wall and wall body root quantity of reinforcement excessive phenomenon again, cause barrier wall structure design not only dangerous but also uneconomical between anchor；(2)
The segmented Calculating method of earth pressure proposed according to Shandong University professor Zhang Hongbo, though safety of structure can be ensured, due to not
Consider that the loading sharing of soil arch acts on, wall design is overly conservative between anchor, uneconomical；(3) both the above method does not consider soil pressure
The dynamic evolution of power, it is impossible to rationally determine barricade least favorable status under loading, cause barrier wall structure design to still suffer from certain safety
Hidden danger, in order to solve technical problem as above, present applicant proposes one kind to be applied to different-stiffness and displacement model lower prestress
The pull-type barricade three-dimensional soil arching effect model test apparatus of anchor.
Technical scheme is further detailed below in conjunction with the accompanying drawings：
As shown in figure 1, variation rigidity lower prestress anchor Rods In Tied Double Retaining Walls pilot model apparatus, including pressure sensor 1, counter-force
Frame 2, load plate 3, anchor plate 4, the barricade 6 of anchor pole 5, anchorage 7, stress spread support 8, anchor head 9, barricade wall rib 10, jack 11,
Framework 12 and steel plate 13；
Load plate 3 uses steel frame plate, it is not necessary to screw bolt reinforcing, is directly positioned on specified location, stress spread support 8 uses spiral shell
Bolt is fixed in up and down among two load plates 3, is applied by load plate 3 and stress spread support 8 to realize on the soil body
The effect of evenly load；
Barricade is provided with described framework, barricade is embedded in one in filler by a horizontal anchor pole connection
Anchor plate；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；Described barricade metope with
Setting is spaced embedding earth pressure gauge, foil gauge, dial gauge；Pressure sensor is set between jack and reaction frame.
As shown in Fig. 2 the board-like barricade model test apparatus of variation rigidity lower prestress grappling, including a framework 12, in institute
Filler is filled with the framework 12 stated；The top of described framework 12 is provided with reaction frame 2, and the bottom of described reaction frame 2 is provided with
Jack 11, the vertical force that described jack 11 applies uniformly arrive load plate 3 by a stress spread support, and described adds
Support plate 3 implements power to the filler in framework；It is provided with barricade 6 in described framework, described barricade 6 is horizontal by one
Anchor pole is directly connected in the side wall of framework 12；The displacement feelings of filler in high-speed camera shooting loading procedure are externally provided with framework
Condition；In described barricade metope to set the embedding earth pressure gauge in interval, foil gauge, dial gauge；Between jack and reaction frame
Pressure sensor is set.
As shown in figure 3, the board-like barricade model test apparatus of variation rigidity lower prestress grappling, including a framework 12, in institute
Filler is filled with the framework 12 stated；The top of described framework 12 is provided with reaction frame 2, and the bottom of described reaction frame 2 is provided with
Jack 11, the vertical force that described jack 11 applies uniformly arrive load plate 3 by a stress spread support, and described adds
Support plate 3 implements power to the filler in framework；It is provided with barricade 6 in described framework, described barricade 6 is horizontal by one
Anchor pole is directly connected to multiple anchor plates 4；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；
Described barricade metope is to set the embedding earth pressure gauge in interval, foil gauge, dial gauge；Pressure is set between jack and reaction frame
Force snesor.4 numbers of anchor plate are determined according to barricade type on each anchoring system.
As shown in figure 5, realizing the change of barricade rigidity by changing the section of wall body and wall rib, comparative analysis difference is just
Spend mechanical characteristic, the deformation characteristic of lower retaining wall.
As shown in fig. 6, monitoring device includes stressometer 14, foil gauge 15, stressometer 14 is fixed on barricade wall body with AB glue
On, for monitoring the mechanical characteristic of barricade, foil gauge is attached to wall, for monitoring the deformation characteristic of barricade.
As shown in figure 5, the barricade includes wall body and wall bottom plate；Specific form includes four kinds：
The first structure designs for wall body uiform section, is welded between wall body and wall bottom plate；
Second is to increase rib post in wall body, is welded between wall body and wall bottom plate；
The third is the sectional dimension that wall body is thinned, and is welded between wall body and wall bottom plate；
4th kind of physical dimension is welded between wall body and wall bottom plate with the third and becomes be hinged.
Barricade wall body and wall bottom plate opening position connected mode are to be rigidly connected and be hinged two ways：Wall bottom plate uses two
Baffle plate is simulated, its absolute rigidity and up and down it is removable, width is adjustable, anchor section for simulating；Barricade wall body is using a gear
Template die is intended, and its rigidity, width, upper-lower position are adjustable, for simulating wall between anchor.
In above-mentioned Fig. 1,2,3, frame side wall (is wherein had steelframe reserved cavity in side conveniently to enter people and tests behaviour by 3 face steelframes
Make) and 1 piece of poly (methyl methacrylate) plate assemble, bottom is steel base；
0.5m hole is reserved in the described face steelframe of device side wall 3, left side with complete steel plate rigid connection, right side steelframe is followed by
Hole, other parts and adjacent both sides side wall rigid connection.
Poly (methyl methacrylate) plate, it is arranged in above side and left side and right side steelframe rigid connection.
Anchor cable is connected by anchor bolt with anchor plate, and outside is fixed by anchorage.
Pressure sensor is placed between reaction frame and jack by cushion block.
The variation rigidity lower prestress anchor Rods In Tied Double Retaining Walls pilot model apparatus construction method of the present invention, is specifically included following several
Individual step：
1. mixing and stirring suprasil sand according to setting moisture content, 1 day is stood；
2. experimenter enters from reserving hole, barricade is installed, will in barricade wall body to set the embedding earth pressure gauge in interval
The line of earth pressure gauge is all connected on soil pressure case, and soil pressure case is connected with computer, and high-speed camera then is placed in into model
Groove clear glass side, opened after placement to record the change of soil body particle displacement in time；
3. quartz sand to be filled to model groove in three times, fill every time all with equipment rammer is rammed to setting compactness, second
It is secondary fill after, first anti-excavate is embedded in anchor plate and anchor cable on reserved location, with screw anchor fixed board, anchor cable and gear
Wall, then earth filling tamping, carries out third time and fills, leveling is tamped when filling up；
4. the load plate of one piece of whole soil body top surface of covering is first placed on the quartz sand face of leveling, then in load plate
Fixed stress spreads support, places one piece of load plate for covering it on stress spread support afterwards, looks for two identical ranges
Jack is positioned symmetrically in load plate, and cushion block is placed on jack, to ensure that pressure sensor can be always very heavy
Top center, then also placed on pressure sensor cushion block be used for connect reaction frame, also for ensure loading procedure in can
Not eccentric force.Rear can is installed by realizing prestressed loading to anchorage cable stretching, is realized by jack vertical
Loading.Wherein load plate uses steel plate, and reaction frame is the I-steel assembly welding steel structure for the type of falling U；
5. change barricade cross-sectional shape, change load mode to realize the experiment of various working, repeatedly the step of 1-4；
6. arrangement and analyze data.
Outstanding anchor formula retaining wall embodiment as shown in Figure 1：
Suprasil sand uniform mixing is placed in sealing bucket, after standing 1 day, optimum moisture content will be configured in bucket
18.1% soil body, the assembling of barricade wall body and wall rib is accomplished manually, with strength glue stressometer and foil gauge and passes through data
Line is connected on computer, opens high-speed camera and computer, is respectively used to observe the change in displacement situation and wall body soil of soil particle
Pressure changing, start to fill afterwards, to ensure filled soils, by the way of placement in layers, carried out using electronic tamping machine
Compacting, in order to prevent the disturbance in ramming to embedded instrument, hand compaction is being used in the range of barricade 20cm, first carrying out the
One layer fill, filled height 30cm, rammed 2 times back and forth with tamping machine, is rammed and is carried out the second layer and fill, and fills counter after 30cm open
Dig 20cm, to embedding anchor plate, anchor pole, it is embedding it is good after flatten compacting, the full model groove of last direct filling, tamped with tamping machine
Leveling, puts load plate, stress spread support, jack, strain gauge and reaction frame equipment.Experimenter shares out the work and help one another,
One people loads vertical stress, a people loads anchor rod prestress, and a people reads related data and recorded, finally according to difference
Operating mode carries out finishing analysis to data.
Pressure dispersing type retaining wall embodiment as shown in Figure 2
Suprasil sand uniform mixing is placed in sealing bucket, after standing 1 day, optimum moisture content will be configured in bucket
18.1% soil body, the assembling of barricade wall body and wall rib is accomplished manually, with strength glue stressometer and foil gauge and passes through data
Line is connected on computer, opens high-speed camera and computer, is respectively used to observe the change in displacement situation and wall body soil of soil particle
Pressure changing, start to fill afterwards, to ensure filled soils, by the way of placement in layers, carried out using electronic tamping machine
Compacting, in order to prevent the disturbance in ramming to embedded instrument, hand compaction is being used in the range of barricade 20cm, is first being carried out
First layer fills, filled height 30cm, rammed back and forth with tamping machine 2 times, is rammed and carries out the second layer and fill, and fills anti-after 30cm
Excavate 20cm, to embedding anchor pole, it is embedding it is good after, anchor pole is fixed on to the wall bodies of both sides with screw, leveling compacting afterwards, most
The full model groove of direct filling afterwards, is tamped with tamping machine and flattened, put load plate, stress spread support, jack, strain gauge and
Reaction frame equipment.Experimenter shares out the work and help one another, and a people loads vertical stress, a people loads anchor rod prestress, and a people reads
Take related data and record, finishing analysis finally are carried out to data according to different operating modes.
Grappling plate type retaining wall embodiment as shown in Figure 3
Suprasil sand uniform mixing is placed in sealing bucket, after standing 1 day, optimum moisture content will be configured in bucket
18.1% soil body, the assembling of barricade wall body and wall rib is accomplished manually, with strength glue stressometer and foil gauge and passes through data
Line is connected on computer, opens high-speed camera and computer, is respectively used to observe the change in displacement situation and wall body soil of soil particle
Pressure changing, start to fill afterwards, to ensure filled soils, by the way of placement in layers, carried out using electronic tamping machine
Compacting, in order to prevent the disturbance in ramming to embedded instrument, hand compaction is being used in the range of barricade 20cm, is first being carried out
First layer fills, filled height 30cm, rammed back and forth with tamping machine 2 times, is rammed and carries out the second layer and fill, and fills anti-after 30cm
20cm is excavated, is evenly arranged anchor plate in reserved location, anchor plate number can determine that anchor plate is fixed on anchor as requested
On bar, anchor pole is bolted on both walls body, backfills sand after placing anchor pole and anchor plate, the leveling compacting second layer is filled out
Soil, the full model groove of last direct filling, is tamped with tamping machine and flattened, and is put load plate, stress spread support, jack, stress and is passed
Sensor and reaction frame equipment.Experimenter shares out the work and help one another, and a people loads vertical stress, and a people loads anchor rod prestress, and one
People reads related data and recorded, and finally carries out finishing analysis to data according to different operating modes.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. variation rigidity prestressing force hangs anchor formula retaining wall model test apparatus；It is characterised in that it includes a framework, in described frame
Filler is filled with frame；The top of described framework is provided with reaction frame, and the bottom of described reaction frame is provided with jack, described
The vertical force that jack applies uniformly arrives load plate by a stress spread support, and described load plate is to the filler in framework
Implement power；Barricade is provided with described framework, described barricade is embedded in filler by a horizontal anchor pole connection
An anchor plate；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；In described barricade
Metope is to set the embedding earth pressure gauge in interval, foil gauge, dial gauge；Pressure sensor is set between jack and reaction frame.
2. variation rigidity prestressed pressure decentralized barricade model test apparatus, it is characterised in that including a framework, described
Filler is filled with framework；The top of described framework is provided with reaction frame, and the bottom of described reaction frame is provided with jack, described
Jack apply vertical force load plate II is uniformly arrived by a stress spread support, described load plate II is in framework
Filler implement power；Barricade is provided with described framework, described barricade is directly connected to by a horizontal anchor pole
In the side wall of framework；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；In described barricade
Metope is to set the embedding earth pressure gauge in interval, foil gauge, dial gauge；Pressure sensor is set between jack and reaction frame.
3. variation rigidity prestressed anchor fixed board formula barricade model test apparatus, it is characterised in that including a framework, in described frame
Filler is filled with frame；The top of described framework is provided with reaction frame, and the bottom of described reaction frame is provided with jack, described
The vertical force that jack applies uniformly arrives load plate II by a stress spread support, and described load plate II is in framework
Filler implements power；Barricade is provided with described framework, described barricade is directly connected to multiple by a horizontal anchor pole
Anchor plate；The misalignment of filler in high-speed camera shooting loading procedure is externally provided with framework；Described barricade metope with
Setting is spaced embedding earth pressure gauge, foil gauge, dial gauge；Pressure sensor is set between jack and reaction frame.
4. the barricade model test apparatus as described in claim 1-3 is any, it is characterised in that four side walls of described framework
Assemble including 3 face steelframes and 1 piece of poly (methyl methacrylate) plate, wherein there is steelframe reserved cavity in side conveniently to enter people's test operation；Frame
The bottom of frame is steel base.
5. the barricade model test apparatus as described in claim 1-3 is any, it is characterised in that described poly (methyl methacrylate) plate, cloth
Put in above side and left side and right side steelframe rigid connection.
6. the barricade model test apparatus as described in claim 1-3 is any, it is characterised in that the barricade includes wall body and wall
Bottom plate；Specific form includes four kinds：
The first structure designs for wall body uiform section, is welded between wall body and wall bottom plate；
Second is to increase rib post in wall body, is welded between wall body and wall bottom plate；
The third is the sectional dimension that wall body is thinned, and is welded between wall body and wall bottom plate；
4th kind of physical dimension is welded between wall body and wall bottom plate with the third and becomes be hinged.
7. barricade model test apparatus as claimed in claim 3, it is characterised in that according to barricade type on each anchoring system
Determine anchor plate number.
8. the barricade model test apparatus as described in claim 1-3 is any, it is characterised in that the reaction frame is spelled by I-steel
Dress is welded to form, and overall is in inverted U, and both ends are connected by bolt with reaction frame fixing device.
9. the barricade model test apparatus as described in claim 1-3 is any, it is characterised in that earth pressure gauge, which is arranged on wall body, is
For measuring the size for the soil pressure that wall body receives；It is for measuring the big of the horizontal displacement of wall body that dial gauge, which is arranged on wall body,
It is small.Strain gauge adhesion in wall body is experienced the deformation after power for detecting wall.
10. the experimental method of the barricade model test apparatus as described in claim 1-3 is any, it is characterised in that
1) the barricade metope in model groove is to set the embedding earth pressure gauge in interval, dial gauge and foil gauge, and quartz sand is by setting
Compactness point multilayer is filled to model groove；
2) it is counter to excavate pre-buried anchor cable and anchor plate when filling the soil body highly more than the height of the anchor system of lowest part, pass through
Bolt connection anchor cable, anchor plate and barricade；The anchor system of other height is also handled with identical method；
3) when whole model groove fills full quartz sand, compacting leveling top surface, load plate, stress spread branch are laid successively in top surface
Frame, jack, pressure sensor and reaction frame；
4) a kind of barrier wall structure form is selected, from a kind of load mode, monitoring soil pressure situation of change, quartz sand particle displacement
Situation and lateral diaphragm wall displacement situation；
5) a variety of different barrier wall structure forms are designed to simulate the change of barricade rigidity, load mode is included without under pre-stressed state
Vertical loading, have the proportional loading mode of vertical loading under pre-stressed state, prestressing force and vertical load, for simulating not
With influence of the stress path to soil pressure redistribution；
6) change barrier wall structure form and load mode repeat step 1-5, complete experimental implementation.
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