CN208329016U - A kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device - Google Patents
A kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device Download PDFInfo
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- CN208329016U CN208329016U CN201820638818.XU CN201820638818U CN208329016U CN 208329016 U CN208329016 U CN 208329016U CN 201820638818 U CN201820638818 U CN 201820638818U CN 208329016 U CN208329016 U CN 208329016U
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Abstract
The utility model belongs to ground foundation engineering technical field of test equipment, it is related to a kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device, ball hinged support is welded in symmetrically placed two support platform lower surfaces center on smooth pedestal, cushion cap is equipped between two support platforms, sole plate and basement rock are separately mounted in two support platforms, rock bolt shank stress meter is mounted in the fiber bar anti-float anchor rod body of rod, first permanent rigidity plate is mounted on the loading surface of sole plate and basement rock, the top of cushion cap is arranged in jack, load sensor is equipped between second permanent rigidity plate and jack, automatic displacement acquisition meter is horizontally arranged on the rigid wing of anchor pole, displacement pedestal is mounted on the upper end of loading surface, it is equipped on basement rock to middle ring, it is of coupled connections to middle ring and the fiber bar anti-float anchor rod body of rod；Its structure is simple, install convenient, strong operability, and securely and reliably, measuring accuracy is high, and at low cost, reuse rate is high.
Description
Technical field:
The utility model belongs to ground foundation engineering technical field of test equipment, is related to a kind of fiber bar anti-float anchor rod stress
Existing pull-out test device is improved, solves the problems, such as anchorage by characteristic simulation laboratory test device, can precisely,
The quickly anti-pulling capacity of test fiber bar anti-float anchor rod, shaft stress variation and anchoring body deformation, for simulating fiber bar
Anti-float anchor rod is in the mechanical characteristic in sole plate and basement rock environment.
Background technique:
Fiber bar is with fibrous material (carbon fiber, glass fibre, aramid fiber, basalt fibre etc.) for reinforcing material,
Synthetic resin is basis material, impregnates the unsaturated polyester resin containing a variety of auxiliary agents such as curing agent, promotor using silvalin
Etc. after resin adhesive liquids, by pultrusion, winding screw thread, a kind of one-time formed new material of solidification.This fiber bar anti-float anchor rod
Have many advantages, such as tensile strength height, light weight, anticorrosive, electromagnetism interference, cost performance is high.In anti-floating engineering, fiber is used
Muscle anti-float anchor rod can overcome metal material anti-float anchor rod during military service by chloride ion, sulfate radical plasma in underground water
Chemical attack, and in the Construction of Urban Rail Traffic project of coastal area direct current generate stray electrical current to metal material
The electrochemical corrosion of generation makes anti-float anchor rod bearing capacity and durability be guaranteed.Simultaneously as fiber bar category anisotropy material
Material, when being used as anti-float anchor rod, shear behavior is poor, and should not bend, and pull-out test heavy workload, time-consuming, can give engineering
Cause unnecessary trouble.Chinese patent 201720304289.5 discloses a kind of rockbolt stress characteristic research and is filled with pull-out test
It sets, including anchor pole preparation system and loading system；Anchor pole preparation system includes system framework, backing plate, a first shell and more
A second shell, loading system include axial force loading device and normal direction force loading device, and the present apparatus realizes collection anchor pole system for the first time
Work is integrated with stress test, can first be made anchor pole and be carried out application axial tension to anchor pole again, analyze the stress condition of anchor pole,
During anchor rod drawing test, it may be implemented to apply anchor pole body controllable normal stress effect, approximate simulation anchor pole
Practical axial direction stress condition preferably takes so that relevant anchor pole axial direction mechanical characteristic result of study seems more reasonable, applicable
It is engaged in the design and construction of anchor pole, but the device is only capable of simulation anchor pole axially with normal direction stress condition, cannot measure anchor simultaneously
The anti-pulling capacity and shaft variation of stress of bar；201710052406.8 disclosing the anchor pole tested under different operating conditions to answer
The experimental rig and method of power meter, this experimental rig include test platform, and test platform upper surface opens up that there are two be mutually perpendicular to
Support track, be provided with roller support in each support track, the central upper portion of roller support is provided with rotation axis, rotation
It is provided with clamping device at the top of axis, anchor pole is clamped between two roller supports, bolt stress meters, two are installed among anchor pole
A strain gauge and two jack, bolt stress meters and strain gauge are connect by data line with data collector；This method includes
Following steps: experimental rig (1) is installed；(2) anchor pole is installed；(3) fixed roller support；(4) installation data collector；(5) right
Anchor pole is tested；(6) data processing, the principle of the present invention is fairly simple, and the state for simulating rockbolt stress is true, but in reality
Its measurement data accuracy is not high and at high cost in the test of border；201420358169.X disclosing a kind of for testing anchor pole
The testing stand of comprehensive mechanical property, the testing stand include be arranged in it is described installation testboard on propulsion and mixing test mechanism,
Bending load mechanism for testing, the axial load mechanism for testing, shearing that installation pre-tightens mechanism for testing and is arranged on work testboard
Load test mechanism and shock loading mechanism for testing；It may be implemented in experiment indoor simulation rockbolt installation and work by the testing stand
Process, and torsion is applied to anchor pole, stretching, bending, is sheared and individual events or the multinomial group of bonding forces such as impact；Using mutually independent
Loading system applies respective loads to anchor pole, can carry out the independent experiment of various load in rockbolt installation and the course of work respectively,
It can also carry out installation stress and the caused stretching of surrouding rock deformation, shear and the combination of several any work stress such as impact load
Test, thus comprehensive mechanical property of the validity test anchor pole under various different force compound actions, but the testing stand is main
For mine support, and structure is complicated, inconvenient.It therefore, is verifying fiber bar anti-float anchor rod in the feasible of engineer application
Property, urgently design it is a kind of rationally, quickly and effectively pull-out test test device is extremely urgent, there is very important reality meaning
Justice and theoretical value.
Summary of the invention:
The goal of the invention of the utility model is to overcome disadvantage of the existing technology, is reducing experimentation cost and improving examination
Under the premise of testing efficiency, design provides a kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device, sticks on it more
Nearly Practical Project can quickly, precisely test the anti-pulling capacity and shaft variation of stress of fiber bar anti-float anchor rod, most heavy
What is wanted is the work that can simulate true anti-float anchor rod system (while the anchoring of simulation with the anchoring of basement rock and with sole plate)
Make mechanism, i.e., self-compensation fiber grating sensor is installed in fiber bar anti-float anchor rod shaft, the body of rod is put into basement rock and reserves grout hole
It is middle at anchor after, the other end is connected with sole plate, carries out anti-float anchor rod anti-pulling capacity and change using simulation laboratory test device
Shape test.
To achieve the goals above, the main structure of the utility model includes smooth pedestal, support platform, cushion cap, basis
Bottom plate, basement rock, injected hole, the fiber bar anti-float anchor rod body of rod, rock bolt shank stress meter, the first permanent rigidity plate, the second permanent rigidity plate,
Jack, load sensor, automatic displacement acquisition meter, displacement pedestal, the rigid wing of anchor pole, centralizer；Smooth pedestal and support platform
Support system is collectively constituted, symmetrically placed two support platforms on smooth pedestal, the lower surface center of each support platform is along water
Square to five ball hinged supports of uniform welding, cushion cap is equipped between two support platforms, sole plate and basement rock are separately mounted to
In two support platforms, the length of basement rock is greater than the length of sole plate, and the position of form center of basement rock is provided with injected hole, and fiber bar is anti-
Drogue club shaft and sole plate pour the anchoring for simulating anti-float anchor rod and sole plate, fiber bar anti-float anchor rod bar jointly
Body is put into the center of injected hole and the cement mortar of M30 is perfused for simulating anchoring of the anti-float anchor rod in basement rock；Rock bolt shank
For stress meter using quasi- distribution mode installation by adhering in the fiber bar anti-float anchor rod body of rod, rock bolt shank stress is calculated as self-compensation type
The multiple spot fiber grating string of mini optical fibre grating strain transducer composition, subject to self-compensation type mini optical fibre grating strain transducer
Distributed arrangement is arranged one every 5cm within the scope of 30cm near the loading surface of sole plate and basement rock, is more than that this range is every
10cm is arranged one；First permanent rigidity plate, the second permanent rigidity plate and jack constitute loading system, the central axes of loading system with
Fiber bar anti-float anchor rod body of rod axis collinear, the first permanent rigidity plate are mounted on the loading surface of sole plate and basement rock, and second is permanent
Rigidity plate is mounted on the first permanent rigidity plate side ipsilateral with loading surface, and the top of cushion cap is arranged in jack, and second is permanent rigid
It spends and is equipped with load sensor between plate and jack, load sensor, automatic displacement acquisition meter, displacement pedestal, the rigid wing of anchor pole are total
With measurement system is constituted, the rigid wing of anchor pole is arranged at sole plate and basal surfaces 5cm；The horizontal peace of automatic displacement acquisition meter
On the rigid wing of anchor pole, displacement pedestal is mounted on the upper end of loading surface, is equipped at the position of trisection on basement rock length direction
Three, to middle ring, are of coupled connections to middle ring and the fiber bar anti-float anchor rod body of rod.
Smooth pedestal described in the utility model is made of the single side smooth steel plate of long 5m, width 2m, thickness 2cm, for reducing
The frictional resistance of bottom surface when pull-out test；Support platform is made of the steel plate of thickness 3cm, long 1.2m, width 0.8m, support platform energy
Enough reduce the friction of brace foundation bottom plate and basement rock and ground, and ensures the weight of brace foundation bottom plate and basement rock.
Cushion cap described in the utility model is placed on steel cushion block by steel plate and is made, steel plate thickness 1cm, a length of 80cm, wide
For 50cm, steel pad thickness is 3cm, a length of 40cm, width 40cm, and when test is padded to test institute by steel plate 3-2 with steel cushion block
Temporary support and locating platform of the loading position needed as loading system.
Sole plate described in the utility model is cast-in-situ steel reinforced concrete rectangular parallelepiped structure, and strength grade of concrete is by design
It is required that determining, the strength grade of ordinary circumstance concrete is C30, a length of 1m of sole plate, width 0.8m, a height of 0.8m；Base
Rock simulated using cast-in-place concrete in weathering ragstone, the intensity of basement rock controls according to the compression strength of concrete, ruler
Very little is long 1.5m, wide 0.8cm, high 0.8m；Pvc pipe when injected hole is casting concrete (diameter 9cm, long 1m, pvc pipe it is outer
Surface apply vaseline, facilitate taking-ups after concrete reaches curing time) reserve through hole；The choosing of the fiber bar anti-float anchor rod body of rod
With the full thread solid hopkinson bar of glass fibre reinforced composion (GFRP), bonding between anchor rod body and anchoring body can be enhanced
Power, and enough anchoring frictional force is provided；Self-compensation type mini optical fibre grating strain transducer body in rock bolt shank stress meter
Product is small, convenient for implantation, and can reject influence of the temperature change to test result, not need individually to arrange temperature sensor again.
The a length of 15cm, width 15cm, thickness 3cm of described in the utility model first permanent rigidity plate；Second permanent rigidity plate
A length of 20cm, width 15cm, thickness 3cm；Jack uses 50 tons of oil pressure punching jack, for providing enough pulling capacities.
Load sensor described in the utility model is type vibration wire automatic pressure acquisition sensor, and automatic displacement acquisition is calculated as thousand
Divide table displacement meter, automatic displacement acquisition meter is connected with external acquisition system realizes the automatic collection of deflection in loading procedure；
Displacement pedestal is made of magnet base, lever, expansion bolt, nut, supporting steel plate, and magnet base is mounted on supporting steel plate, lever peace
Mounted in magnet base middle position, the supporting steel plate expansion bolt and matched nut being displaced in pedestal are separately fixed at basic bottom
On plate and basement rock；The rigid wing of anchor pole by 5cm × 5cm × 0.5cm angle bar and outer diameter 2cm, wall thickness 0.3cm semicircle steel-pipe welding and
At, and be adhesive on the fiber bar anti-float anchor rod body of rod using structure；Centralizer is the plastics mounting ring of outer diameter 8cm.
The utility model carries out the detailed process of simulation laboratory test to fiber bar anti-float anchor rod mechanical characteristic are as follows:
(1) it makes basement rock: vertically building the template of basement rock first, the pvc pipe that outside is coated with release agent is fixed on basement rock
On axis line position in template, concrete standard test block is made using prior art casting concrete and under the same conditions,
To take out pvc pipe to form injected hole before its final set, insertion is implanted with the fiber bar anti-floating of rock bolt shank stress meter in injected hole
Anchor rod body, and centralizer is installed in the preliminary making position of the fiber bar anti-float anchor rod body of rod, M30 cement mortar is poured, is made simultaneously
Make mortar specimen, maintenance to age forms mortar anchoring body, detects its intensity；Rock bolt shank stress is protected in the process
Meter, it is ensured that its survival rate reaches 95%；
(2) make sole plate: in the support platform of smooth pedestal be horizontally arranged intensity up to 100% basement rock, so
The second permanent rigidity plate, jack and load sensor are sequentially passed through into the fiber bar anti-float anchor rod body of rod afterwards and are mounted on the upper of cushion cap
Surface guarantees the centroid of the second permanent rigidity plate, jack, load sensor and the fiber bar anti-float anchor rod body of rod with always
Line, then build in support platform the template of sole plate, banding steel cage, the fiber bar anti-float anchor rod body of rod exists in fixed basement rock
Position in the template of sole plate, last casting concrete make sole plate, and concrete standard test block is made under the conditions of
And its intensity is tested, maintenance to age, to determine the relative position of sole plate and basement rock before its final set again, it is ensured that levelness
With the survival rate of 95% rock bolt shank stress meter；
(3), displacement meter is installed: drilling installation displacement pedestal in position first on the upper side in sole plate and basement rock center with electric drill
Expansion bolt and steel plate, then be 2:1 with mass ratio epoxy resin and curing agent mixed liquor anchor pole is pasted on corresponding position
The rigid wing conserves 3 days, after epoxy resin is fully cured, magnet base is adsorbed on supporting steel plate and installs automatic displacement acquisition
Meter, the telescopic rod of automatic displacement acquisition meter is finally compressed a certain distance, and (ensuring telescopic rod when test at least can extend
4cm, displacement more than 4cm think that anchor pole destroys) alignment is placed on the rigid wing of anchor pole, guarantee automatic displacement acquisition meter level with
Vertically；
(4), it is tested: jack and external hydraulic oil pump being connected firmly with matched oil pipe, by automatic displacement
Acquisition meter and rock bolt shank stress meter are connect with the (FBG) demodulator interface of external acquisition system respectively, initial reading are recorded, wait sense
Device survival rate meets the requirements rear multistage loadings, while recording test data, test Load-unload and termination loading environment and anchor pole
The criterion of destruction is executed by " building foundation pit supporting technical regulation " (JGJ120-2012)).
The utility model need to be protected as far as possible before use, to ensure fiber bar anti-float anchor rod body of rod axial tension when pull-out test
Demonstrate,prove sole plate central axes, basement rock central axes, fiber bar anti-float anchor rod body of rod axis, loading system central axes level；Guarantee base
The compactness and intensity of mortar and epoxy resin in the concrete of plinth bottom plate and basement rock, grout hole.
Compared with prior art, structure is simple for the utility model, install convenient, strong operability, securely and reliably, test
Precision is high, at low cost, and reuse rate is high, can truely and accurately reflect the working condition of anti-float anchor rod in Practical Project.
Detailed description of the invention:
Fig. 1 is the main structure schematic illustration of the utility model.
Fig. 2 is the main structure top view of the utility model.
Fig. 3 is the principle schematic diagram of the rigid wing of anchor pole described in the utility model, wherein (a) is main view, it is (b) vertical view
Figure.
Fig. 4 is the principle schematic diagram of centralizer described in the utility model.
Fig. 5 is the principle schematic diagram of displacement pedestal described in the utility model, wherein (a) is main view, it is (b) vertical view
Figure.
Specific embodiment:
The utility model is described in further detail by way of example and in conjunction with the accompanying drawings.
Embodiment:
The main structure of the present embodiment includes smooth pedestal 1, support platform 2, cushion cap 3, sole plate 4, basement rock 5, slip casting
Hole 6, the fiber bar anti-float anchor rod body of rod 7, the permanent rigidity plate 10 of the permanent rigidity plate 9, second of rock bolt shank stress meter 8, first, jack
11, load sensor 12, automatic displacement acquisition meter 13, displacement pedestal 14, the rigid wing 15 of anchor pole, centralizer 16；Smooth pedestal 1 and branch
Support platform 2 collectively constitutes support system, symmetrically placed two support platforms 2 on smooth pedestal 1, the following table of each support platform 2
Face center five ball hinged supports 17 of uniform welding in the horizontal direction are equipped with cushion cap 3,4 He of sole plate between two support platforms 2
Basement rock 5 is separately mounted in two support platforms 2, and the length of basement rock 5 is greater than the length of sole plate 4, the position of form center of basement rock 5
It is provided with injected hole 6, the fiber bar anti-float anchor rod body of rod 7 and sole plate 4 are poured jointly for simulating anti-float anchor rod and sole plate
Anchoring, the fiber bar anti-float anchor rod body of rod 7 is put into the center of injected hole 6 and the cement mortar of M30 is perfused for simulating anti-floating anchor
Anchoring of the bar in basement rock；Rock bolt shank stress meter 8 is using quasi- distribution mode installation by adhering in the fiber bar anti-float anchor rod body of rod 7
Interior, rock bolt shank stress meter 8 is the multiple spot fiber grating string of self-compensation type mini optical fibre grating strain transducer composition, self compensation
Distributed arrangement subject to the type that declines fiber Bragg grating strain sensor, the 30cm range near the loading surface of sole plate 4 and basement rock 5
It is interior to be arranged one every 5cm, it is more than that the every 10cm of this range is arranged one；The first permanent rigidity plate 10 of permanent rigidity plate 9, second and very heavy
Top 11 constitutes loading system, the central axes of loading system and 7 axis collinear of the fiber bar anti-float anchor rod body of rod, the first permanent rigidity plate 9
It is mounted on the loading surface of sole plate 4 and basement rock 5, the second permanent rigidity plate 10 is mounted on the first permanent rigidity ipsilateral with loading surface
On 9 side of plate, the top of cushion cap 3 is arranged in jack 11, is equipped with loading between the second permanent rigidity plate 10 and jack 11 and senses
Device 12, load sensor 12, automatic displacement acquisition meter 13, displacement pedestal 14, the rigid wing 15 of anchor pole collectively form measurement system, anchor pole
The rigid wing 15 is arranged at 5 top surface 5cm of sole plate 4 and basement rock；Automatic displacement acquisition meter 13 is horizontally arranged at the rigid wing of anchor pole
On 15, displacement pedestal 14 is mounted on the upper end of loading surface, and there are three centerings for installation at the position of trisection on 5 length direction of basement rock
Ring 16 is of coupled connections to middle ring 16 and the fiber bar anti-float anchor rod body of rod 7.
Smooth pedestal 1 described in the present embodiment is made of the single side smooth steel plate of long 5m, width 2m, thickness 2cm, is drawn for reducing
The frictional resistance of bottom surface when pulling out test；Support platform 2 is made of the steel plate of thickness 3cm, long 1.2m, width 0.8m, 2 energy of support platform
Enough reduce the friction of brace foundation bottom plate 4 and basement rock 5 and ground, and ensures the weight of brace foundation bottom plate 4 and basement rock 5.
Cushion cap 3 described in the present embodiment is placed on steel cushion block 3-1 by steel plate 3-2 and is made, and steel plate 3-2 is a length of with a thickness of 1cm
80cm, width 50cm, steel cushion block 3-1 are with a thickness of 3cm, a length of 40cm, width 40cm, with steel cushion block 3-1 by steel plate 3-2 when test
Temporary support and locating platform of the padded loading position to needed for testing as loading system.
Sole plate 4 described in the present embodiment is cast-in-situ steel reinforced concrete rectangular parallelepiped structure, and strength grade of concrete is by design
It is required that determining, the strength grade of ordinary circumstance concrete is C30, a length of 1m of sole plate 4, width 0.8m, a height of 0.8m；Base
Rock 5 simulated using cast-in-place concrete in weathering ragstone, the intensity of basement rock 5 controls according to the compression strength of concrete,
Having a size of long 1.5m, wide 0.8cm, high 0.8m；Injected hole 6 be casting concrete when pvc pipe (diameter 9cm, long 1m, pvc pipe
Outer surface apply vaseline, facilitate taking-ups after concrete reaches curing time) reserve through hole；The fiber bar anti-float anchor rod body of rod
7 select the full thread solid hopkinson bar of glass fibre reinforced composion (GFRP), can enhance holding between anchor rod body and anchoring body
Power is wrapped up in, and enough anchoring frictional force is provided；Self-compensation type mini optical fibre grating strain transducer in rock bolt shank stress meter 8
It is small in size, convenient for implantation, and influence of the temperature change to test result can be rejected, not need individually to arrange temperature sensing again
Device.
The a length of 15cm, width 15cm, thickness 3cm of first permanent rigidity plate 9 described in the present embodiment；Second permanent rigidity plate 10
A length of 20cm, width 15cm, thickness 3cm；Jack 11 uses 50 tons of oil pressure punching jack, for providing enough drawings
Power.
Load sensor 12 described in the present embodiment is type vibration wire automatic pressure acquisition sensor, and automatic displacement acquisition meter 13 is
Amesdial displacement meter, automatic displacement acquisition meter 13 is connected with external acquisition system realizes that the automatic of deflection is adopted in loading procedure
Collection；Displacement pedestal 14 is made of magnet base 14-1, lever 14-2, expansion bolt 14-3, nut 14-4, supporting steel plate 14-5, magnetic
Power seat 14-1 is mounted on supporting steel plate 14-5, and lever 14-2 is mounted on the middle position magnet base 14-1, the branch being displaced in pedestal 14
Steel plate 14-5 is held to be separately fixed on sole plate 4 and basement rock 5 with expansion bolt 14-3 and matched nut 14-4；The rigid wing of anchor pole
15 are welded by 5cm × 5cm × 0.5cm angle bar and the semicircle steel pipe of outer diameter 2cm, wall thickness 0.3cm, and use structure gluing
On the fiber bar anti-float anchor rod body of rod 7,；Centralizer 16 is the plastics mounting ring of outer diameter 8cm.
The present embodiment carries out the detailed process of simulation laboratory test to fiber bar anti-float anchor rod mechanical characteristic are as follows:
(1) it makes basement rock 5: vertically building the template of basement rock 5 first, the pvc pipe that outside is coated with release agent is fixed on base
On axis line position in 5 template of rock, using prior art casting concrete and makes concrete standard under the same conditions and try
Block, to take out pvc pipe to form injected hole 6 before its final set, insertion is implanted with the fiber of rock bolt shank stress meter 8 in injected hole 6
The muscle anti-float anchor rod body of rod 7, and centralizer 16 is installed in the preliminary making position of the fiber bar anti-float anchor rod body of rod 7, pour M30 cement bonded sand
Slurry, while mortar specimen is made, maintenance to age forms mortar anchoring body, detects its intensity；Anchor pole is protected in the process
Shaft stress meter 8, it is ensured that its survival rate reaches 95%；
(2) make sole plate 4: in the support platform 2 of smooth pedestal 1 be horizontally arranged intensity up to 100% basement rock
5, the second permanent rigidity plate 10, jack 11 and load sensor 12 are then sequentially passed through into the fiber bar anti-float anchor rod body of rod 7 and pacified
Mounted in the upper surface of cushion cap 3, guarantee the second permanent rigidity plate 10, jack 11, load sensor 12 and fiber bar anti-float anchor rod
The centroid of the body of rod 7 is in same straight line, then builds in support platform 2 template of sole plate 5, banding steel cage, fixed basement rock 5
Position of the middle fiber bar anti-float anchor rod body of rod 7 in the template of sole plate 4, last casting concrete make mixed under the conditions of
Solidifying soil reference block simultaneously tests its intensity, maintenance to age, to determine the opposite of sole plate 4 and basement rock 5 before its final set again
Position, it is ensured that levelness and 95% rock bolt shank stress meter 8 survival rate；
(3), displacement meter is installed: drilling installation displacement base in position first on the upper side in sole plate 4 and 5 center of basement rock with electric drill
The expansion bolt and steel plate of seat 14, then the epoxy resin for being 2:1 with mass ratio are pasted on corresponding position with curing agent mixed liquor
The rigid wing 15 of anchor pole conserves 3 days, after epoxy resin is fully cured, magnet base 14-1 is adsorbed on supporting steel plate 14-5 and is pacified
Automatic displacement acquisition meter 13 is filled, the telescopic rod of automatic displacement acquisition meter 13, which is finally compressed a certain distance, (ensures to stretch when test
Contracting bar can at least extend 4cm, and displacement thinks that anchor pole destroys more than 4cm) alignment is placed on the rigid wing 15 of anchor pole, guarantee oneself
Dynamic displacement acquisition meter 13 is horizontal and vertical；
(4), it is tested: jack 11 and external hydraulic oil pump being connected firmly with matched oil pipe, by automatic position
It moves acquisition meter 13 and rock bolt shank stress meter 8 is connect with the (FBG) demodulator interface of external acquisition system respectively, record initial reading, to
Sensor survival rate meets the requirements rear multistage loadings, while recording test data, test Load-unload and terminate loading environment and
The criterion that anchor pole destroys is executed by " building foundation pit supporting technical regulation " (JGJ120-2012)).
Claims (6)
1. a kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device, it is characterised in that main structure includes smooth base
Seat, support platform, cushion cap, sole plate, basement rock, injected hole, the fiber bar anti-float anchor rod body of rod, rock bolt shank stress meter, first
Permanent rigidity plate, the second permanent rigidity plate, jack, load sensor, automatic displacement acquisition meter, displacement pedestal, the rigid wing of anchor pole, centering
Device；Smooth pedestal and support platform collectively constitute support system, symmetrically placed two support platforms on smooth pedestal, each support
The lower surface center of platform five ball hinged supports of uniform welding in the horizontal direction are equipped with cushion cap, basis between two support platforms
Bottom plate and basement rock are separately mounted in two support platforms, and the length of basement rock is greater than the length of sole plate, the centroid position of basement rock
It sets and is provided with injected hole, the fiber bar anti-float anchor rod body of rod is put into the center of injected hole and the cement mortar of M30 is perfused；Rock bolt shank is answered
For power meter installation by adhering in the fiber bar anti-float anchor rod body of rod, rock bolt shank stress is calculated as self-compensation type mini optical fibre grating strain
The multiple spot fiber grating string of sensor composition, distributed arrangement subject to self-compensation type mini optical fibre grating strain transducer, in base
It is arranged one every 5cm within the scope of 30cm near the loading surface of plinth bottom plate and basement rock, is more than that the every 10cm of this range is arranged one；The
One permanent rigidity plate, the second permanent rigidity plate and jack constitute loading system, the central axes of loading system and fiber bar anti-float anchor rod
Body of rod axis collinear, the first permanent rigidity plate are mounted on the loading surface of sole plate and basement rock, the second permanent rigidity plate be mounted on
On the first ipsilateral permanent rigidity plate side of loading surface, jack is arranged in the top of cushion cap, the second permanent rigidity plate and jack it
Between be equipped with load sensor, load sensor, automatic displacement acquisition meter, displacement pedestal, the rigid wing of anchor pole collectively form measurement system,
The rigid wing of anchor pole is arranged at sole plate and basal surfaces 5cm；Automatic displacement acquisition meter is horizontally arranged on the rigid wing of anchor pole,
Displacement pedestal is mounted on the upper end of loading surface, and there are three to middle ring, centering for installation at the position of trisection on basement rock length direction
Ring is of coupled connections with the fiber bar anti-float anchor rod body of rod.
2. fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device according to claim 1, it is characterised in that described
Smooth pedestal is the single side smooth steel plate of long 5m, width 2m, thickness 2cm；Support platform is the steel plate of thickness 3cm, long 1.2m, width 0.8m.
3. fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device according to claim 1, it is characterised in that described
Cushion cap is placed on steel cushion block by steel plate and is formed, steel plate thickness 1cm, a length of 80cm, width 50cm, and steel pad thickness is 3cm,
A length of 40cm, width 40cm.
4. fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device according to claim 1, it is characterised in that described
Sole plate is cast-in-situ steel reinforced concrete rectangular parallelepiped structure, and the strength grade of concrete is C30, a length of 1m of sole plate, wide
For 0.8m, a height of 0.8m；The size of basement rock is long 1.5m, wide 0.8cm, high 0.8m；The fiber bar anti-float anchor rod body of rod is selected as glass
The full thread solid hopkinson bar of fibre reinforced composites.
5. fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device according to claim 1, it is characterised in that described
The a length of 15cm, width 15cm, thickness 3cm of first permanent rigidity plate；A length of 20cm of second permanent rigidity plate, width 15cm, thickness are
3cm；Jack uses 50 tons of oil pressure punching jack.
6. fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device according to claim 1, it is characterised in that described
Load sensor is type vibration wire automatic pressure acquisition sensor, and automatic displacement acquisition is calculated as amesdial displacement meter, and automatic displacement is adopted
Collection meter is connected with external acquisition system；Displacement pedestal is made of magnet base, lever, expansion bolt, nut, supporting steel plate, magnetic
Power seat is mounted on supporting steel plate, and lever is mounted on magnet base middle position, the supporting steel plate expansion bolt that is displaced in pedestal and
Matched nut is separately fixed on sole plate and basement rock；The rigid wing of anchor pole is by 5cm × 5cm × 0.5cm angle bar and outer diameter
2cm, wall thickness 0.3cm semicircle steel pipe be welded, and be adhesive on the fiber bar anti-float anchor rod body of rod using structure；Centralizer is
The plastics mounting ring of outer diameter 8cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820638818.XU CN208329016U (en) | 2018-04-28 | 2018-04-28 | A kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820638818.XU CN208329016U (en) | 2018-04-28 | 2018-04-28 | A kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device |
Publications (1)
| Publication Number | Publication Date |
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| CN208329016U true CN208329016U (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820638818.XU Active CN208329016U (en) | 2018-04-28 | 2018-04-28 | A kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108978734A (en) * | 2018-04-28 | 2018-12-11 | 青岛理工大学 | A kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device |
| CN109469125A (en) * | 2019-01-11 | 2019-03-15 | 深圳宏业基岩土科技股份有限公司 | A kind of the load on pile foundation experimental rig and its detection method of optical fiber grating sensing detection |
| CN112629836A (en) * | 2020-10-29 | 2021-04-09 | 中冶建筑研究总院有限公司 | Automatic compensation device for prestress loss |
| CN112945426A (en) * | 2021-01-29 | 2021-06-11 | 西南石油大学 | Vibrating wire sensor and stress displacement testing method |
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2018
- 2018-04-28 CN CN201820638818.XU patent/CN208329016U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978734A (en) * | 2018-04-28 | 2018-12-11 | 青岛理工大学 | A kind of fiber bar anti-float anchor rod mechanical characteristic simulation laboratory test device |
| CN109469125A (en) * | 2019-01-11 | 2019-03-15 | 深圳宏业基岩土科技股份有限公司 | A kind of the load on pile foundation experimental rig and its detection method of optical fiber grating sensing detection |
| CN109469125B (en) * | 2019-01-11 | 2024-01-30 | 深圳宏业基岩土科技股份有限公司 | Pile foundation load test device for fiber bragg grating sensing detection and detection method thereof |
| CN112629836A (en) * | 2020-10-29 | 2021-04-09 | 中冶建筑研究总院有限公司 | Automatic compensation device for prestress loss |
| CN112629836B (en) * | 2020-10-29 | 2022-08-26 | 中冶建筑研究总院有限公司 | Automatic compensation device for prestress loss |
| CN112945426A (en) * | 2021-01-29 | 2021-06-11 | 西南石油大学 | Vibrating wire sensor and stress displacement testing method |
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