CN207211221U - Miniature anti-floating pile resistance to plucking bearing capacity testing arrangement of fibre muscle - Google Patents
Miniature anti-floating pile resistance to plucking bearing capacity testing arrangement of fibre muscle Download PDFInfo
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- CN207211221U CN207211221U CN201721282766.9U CN201721282766U CN207211221U CN 207211221 U CN207211221 U CN 207211221U CN 201721282766 U CN201721282766 U CN 201721282766U CN 207211221 U CN207211221 U CN 207211221U
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- 238000006243 chemical reaction Methods 0.000 claims description 30
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- 239000007787 solid Substances 0.000 claims description 5
- 239000003351 stiffener Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
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- 239000010410 layer Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000007586 pull-out test Methods 0.000 description 2
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Abstract
The utility model relates to the technical field of foundation foundations, in particular to a device for testing the uplift bearing capacity of a fiber-reinforced micro uplift pile, wherein the upper part of a first steel backing plate is connected with a high-strength nut, the lower end of the first steel backing plate is connected with a load sensor, the lower part of the load sensor is connected with a second steel backing plate, and the bottom of the second steel backing plate is connected with a counter-force beam; jack backing plates are placed on two sides of the pile hole, the bottom of the jack is installed in the center of the jack backing plate, the top of the jack is tightly attached to a third steel backing plate, a beam stool is placed on the jack backing plate, and a hoop rib and a fiber rib in the pile hole are connected to form an uplift pile fiber rib cage; the fiber bar lock head and the fiber bar are anchored on the high-strength drawing screw rod of the expanded head, the displacement sensors are symmetrically arranged on two sides of the pile top of the fiber bar micro uplift pile, and the displacement sensors are fixedly arranged on the reference beam; two ends of the reference beam are respectively supported on the buttresses; the device is simple to install, strong in operability, high in safety and reliability, not easy to damage, reusable, low in cost and capable of obtaining larger pulling-resistant bearing capacity.
Description
Technical field：
Foundation technical field is the utility model is related to, is related to a kind of miniature uplift pile anti-pulling capacity test of fiber bar
Device, non-metallic fibers muscle is applied to miniature uplift pile instead of traditional reinforcing bar, meanwhile, surveyed with special more advanced drawing
Trial assembly is put carries out anti-pulling capacity experiment to the miniature uplift pile of fiber bar (90~400mm of diameter), measures the position in drawing process
Shifting and bearing capacity, are studied its deformation characteristic and load-carrying properties, the test method strong operability, experimental rig is simply smart
Close, cost is relatively low.
Background technology：
With the propulsion of urbanization process, buildings or structures moulding is more complicated, the number of plies is higher, causes buildings or structures basic
Buried depth is bigger, and influence of the underground water to construction of structures is bigger, and anti-floating problem is more prominent.Therefore, the measure of anti float of high-efficiency high-quality
The security of structure is particularly important.Miniature uplift pile is the mortar using mini pile pulling force and mini pile integration
Stratum consolidation is formed globality earth formation so as to play a kind of stake of anti-floating effect by (pea gravel concreten) anchoring body.It is miniature
Uplift pile has ground adaptability strong, arranges shape compared to measure of anti float such as drop row underground water, ballast method, large diameter anti-float piles
Formula is flexible, speed of application is fast and it is green the advantages that, it is especially with the obvious advantage in hard rock-soil layer, such as in hard rock
The uplift pile for major diameter of being constructed in stone, more difficult and engineering cost of constructing are high.
At present, reinforcing bar is one of main composition material of miniature uplift pile, because its Cl in by underground water-, SO4 2-Plasma
Chemical attack, so as to influence the load-carrying properties of miniature uplift pile and durability, this influence is in coastal area buildings or structures
It is more prominent in base application；In addition, found in subway construction project, because direct current can be right for system electricity generation stray electrical current
Reinforcing bar produces more serious electrochemical corrosion, substantially reduces the service life of float Structure.Thus miniature uplift pile in engineering
Anticorrosion Problems become particularly significant, in Practical Project, it will usually according to the design life of uplift pile and residing
The environment category of layer determines armored concrete uplift pile anti-corrosion protection grade and precautionary measures.But found after practical application, often
The miniature uplift pile of rule can not fundamentally solve the etching problem of pile body reinforcing bar.GFRP(Glass Fiber Reinforced
Polymer, fiberglass reinforced plastics) material has tensile strength height, light weight, an anticorrosive, electromagnetism interference, and and other
Fiber-reinforced polymer is low compared to having price, cost-effective, the advantages that being widely used, is applied the energy in miniature uplift pile
Solve the endurance issues of stake, be the innovation and breakthrough to present situation engineering technology.But the fiber bar in this miniature uplift pile exists
Be under load action how cooperative bearing, and be how during pull-out test and loading test to realize quick anchoring again
And provide the not related open report of reliable anchor force.Therefore, it is miniature anti-there is an urgent need to seek to design a kind of fiber bar
Pile pulling anti-pulling capacity test device, the device verify such fiber bar type stake anti-floating for solving the durability of float Structure
Micro- bearing capacity, determine that it deforms limitation and requires highly important Social benefit and economic benefit.
The content of the invention：
The shortcomings that goal of the invention of the present utility model is to overcome prior art to exist, seek to design a kind of fiber bar miniature
Uplift pile anti-pulling capacity test device, it is new miniature to form to substitute traditional reinforcing bar using non-metallic fibers muscle
Uplift pile, and for its special design anti-pulling capacity experimental rig, the popularization and application for such miniature uplift pile provide foundation, its
Workable, test data is accurate, and cost is relatively low, there is preferable dissemination.
To achieve these goals, the master of the miniature uplift pile anti-pulling capacity experimental rig of fiber bar described in the utility model
Body structure includes the high-strength drawing screw rod of enlarged footing, high-strength nut, the first billet, load sensor, the second billet, counter-force
Beam, the 3rd billet, beam stool, jack, jack pad, fiber bar tapered end, fiber bar, stirrup, stake holes, displacement transducer,
Magnetic stand, datum line beam and buttress；The high-strength drawing screw rod of enlarged footing is that the rigidity being made up of screw rod shaft and bottom enlarged footing is real
Core structure, the diameter of screw rod shaft are defined as 60~80mm by the bearing capacity of miniature uplift pile, and enlarged footing is in the form of annular discs, and thickness is
50mm, edge are formed with some holes, and hole diameter is determined by the diameter of fiber bar, are available for fiber bar through installation, empty quantity
Determined according to being actually needed；The high-strength nut of hexagon cylindrical structure is connected to the high-strength spiral shell of enlarged footing in a manner of screw thread couple
The outer surface of bar, it is multiple to be used in series to provide enough counter-forces；The length of side of first billet of square structure is 20cm, thickness
For 3cm, center is formed with hole, and the hole diameter is more than the diameter of enlarged footing high-strength bolt, the first billet top and high-strength spiral shell
Parent phase connects, and lower end is connected with load sensor；Load sensor is punching structure, directly perceived by external supporting digital indicator
The load applied is shown, load sensor bottom is connected with the second billet；The second billet length of side of square structure is 30cm
× 30cm, thickness 3cm, center are formed with hole, and its hole diameter is slightly larger than the diameter of enlarged footing high-strength bolt, the second billet
Bottom be connected with reaction beam；Reaction beam is welded into box structure using thickness 3cm steel plate, and its span is 1.8m, a width of
30cm, a height of 60cm, reaction beam set a number of longitudinal stiffener along span direction, and the quantity of longitudinal stiffener is according to reality
Border it needs to be determined that, it is ensured that reaction beam has enough rigidity and stability, and linked hole is reserved with the upper lower flange of span centre reaction beam
Hole, hole diameter will be easy to enlarged footing high-strength bolt screw rod shaft to pass freely through；Jack pad is symmetrically disposed at the two of stake holes
Side, it is not less than 50cm with the distance at stake holes edge, to avoid experimental rig sedimentation is excessive from causing test data inaccurate；Jack
Bottom be arranged on jack pad center, the 3rd billet is close at top, and positioned at the 3rd billet center, two jack
For model of the same race, and enough pulling capacities can be provided, it is the jack high-pressure oil pump supporting with it, separating valve is high during drawing
Pressuring oil pipe is connected, and realizes synchronization of jacking up reaction beam；The structure of 3rd billet is identical with the second billet, by the 3rd steel during use
Backing plate is placed between jack and reaction beam；Beam stool is the cuboid opening lattice configured construction that shaped steel is welded into, and a length of 40cm is wide
For 30cm, a height of 40cm, ensure that the high-pressure oil pipe being connected with jack that its side is set can pass freely through, beam stool is placed on
On jack pad, the 3rd billet and jack are respectively positioned on inside beam stool；The jack pad length of side of square structure is 50cm,
Thickness is 3cm, and its bottom surface is connected with the levelling sand bedding course that ground is laid in advance；Fiber bar and stirrup are glass fiber reinforcement modeling
Expect (GFRP) full thread solid rod-like structure, for the cohesion of reinforcing fiber muscle and concrete, stirrup is helically in stake holes
Shape, finer wire colligation is used together with fiber bar and is connected to form uplift pile fiber bar cage；Enlarged footing is passed through in stake holes outer fiber muscle
The circular hole reserved on high-strength drawing screw rod enlarged footing, fiber bar tapered end are anchored at enlarged footing with fiber bar in a manner of screw thread couple
On high-strength drawing screw rod, in addition, drop has AB glue or fiber bar tapered end is dipped in into glue in gap between fiber bar tapered end and fiber bar
Then it is screwed on fiber bar, to provide enough anchor forces；Fiber bar tapered end is internal thread rim of a cup type nut, its material and fiber
Muscle is identical, and inner surface is glutinous sand mold, and as the increase of load makes fiber bar lock more and more tight, its height is according to the uplift pile limit
Bearing capacity determines, and leaves 1.2 times of safety coefficient；Displacement transducer is optical signal displacement meter, and it is micro- to be symmetrically mounted on fiber bar
The stake top both sides of type uplift pile, displacement transducer are fixedly mounted on datum line beam by magnetic stand；Datum line beam is channel-section steel, is located at
Stake holes both sides, the both ends of datum line beam are respectively supported on buttress, and datum line beam installation method meets《Architecture foundation pile detection technique is advised
Model》(JGJ106-2014) requirement；Buttress is the cuboid prefabricated components of concreting, and its upper surface is connected with datum line beam,
Lower surface is connected with ground.
The utility model realizes that the detailed process of the miniature uplift pile anti-pulling capacity test of fiber bar is：
(1) uplift pile fiber bar cage is made, fiber bar is first passed through into tie hoop one by one, then with tied silk by fiber
Muscle banding fixed forms uplift pile fiber bar cage, fiber bar and the respective spacing of stirrup and diameter need to meet on tie hoop
Existing specification and design requirement；
(2) by after levelling of the land, first both drilled with down-the-hole drill in fixed pile, forming stake holes and check the aperture of stake holes
And hole depth, then the lifting of uplift pile fiber bar cage is transferred in stake holes, ensure that fiber bar cage is located at stake holes center, and with enough
Protective layer thickness, then casting concrete (intensity of concrete should meet design requirement) from bottom to top, smear after vibration compacting
Flat stake top, concrete test block is made with the conditions of, and whether the intensity for detecting concrete test block meets to require；
(3) after conserving 28 days, loading device is installed, first in the miniature lateral extent pile center at least 50cm of uplift pile two of fiber bar
Position lay 5cm thickness sand bedding course and levelling respectively, ensure that its compactness and rigidity can support top loading device enough, will not
Sedimentation is produced in loading procedure, is then sequentially placed jack pad, jack, the 3rd steel pad from bottom to top in the position
Plate, beam stool and reaction beam, while will be enlarged by head height and hale pulling out screw rod and passing through reaction beam, on the high-strength drawing screw rod of enlarged footing successively
Second billet, load sensor, the first billet, high-strength nut are laid through the high-strength drawing screw tip of enlarged footing, rotation
Turn the position of the high-strength nut regulation high-strength drawing screw rod bottom enlarged footing of enlarged footing, now, will on the ground with fiber bar tapered end
Overhanging fiber bar is fixed on the reserving hole position of the high-strength drawing screw rod bottom enlarged footing of enlarged footing in a manner of screw thread couple, most
High-strength nut is tightened with torque spanner afterwards, to ensure that the high-strength drawing screw rod bottom enlarged footing of enlarged footing is horizontal in whole installation process
And fiber bar uniform stressed, and enlarged footing high-strength bolt, the first billet, load sensor, the second billet and reaction beam
The centre of form on the same line, make a concerted effort center line and the cross section centre of form axle weight of the miniature uplift pile of fiber bar of two jack
Close, so that the miniature uplift pile uniaxial force of fiber bar；
(4) bearingtest of the miniature uplift pile of fiber bar is carried out, branch is symmetrically put in the miniature uplift pile both sides of fiber bar
Pier, datum line beam are arranged on buttress, then install magnetic stand in datum line beam and displacement transducer, wherein displacement transducer are symmetrical
Be arranged on the miniature uplift pile stake top of fiber bar, in addition to ensuring datum line beam, displacement transducer and not shaking, test device will also
Meet《Architecture foundation pile inspection specifications》(JGJ106-2014) requirement, load sensor is connected to external Acquisition Instrument
On, jack is closely coupled by supporting high-pressure oil pipe and supporting high-pressure oil pump and separating valve, and precharge checks that loading passes
Whether sensor, displacement transducer and loading device are working properly, until the reading of load sensor reaches 5kN, it was demonstrated that loading dress
Put and contacted the amount of pulling out on the miniature uplift pile anti-pulling capacity of close rear beginning test data sheet fiber bar and pile body.
The utility model is before use, ensure enlarged footing high-strength bolt, the first billet, load sensor, the second steel as far as possible
Backing plate, reaction beam the centre of form on the same line, two jack make a concerted effort center line should be with the horizontal stroke of the miniature uplift pile of fiber bar
Cross-section centroid overlapping of axles, reaction beam will meet the requirement of bearing capacity, while ensure that the bed course below jack pad is close
Solidity and rigidity, pull-out test need to be carried out after 28 days in concreting, ensure that each member in tight connects in loading device during experiment
Touch.
Compared with prior art, installation is simple for the utility model, workable, security reliability is high, device not rapid wear
It is bad, reusable, cost is low, can obtain bigger anti-pulling capacity.
Brief description of the drawings：
Fig. 1 is that the agent structure principle of the miniature uplift pile anti-pulling capacity test device of fiber bar described in the utility model is shown
It is intended to.
Fig. 2 is that the agent structure of the miniature uplift pile anti-pulling capacity test device of fiber bar described in the utility model is overlooked
Figure.
Fig. 3 is the profile of reaction beam 6 described in the utility model.
Fig. 4 is the top view of the high-strength drawing screw rod 1 of enlarged footing described in the utility model.
Fig. 5 is the top view of fiber bar tapered end 11 described in the utility model.
Fig. 6 is the profile of fiber bar tapered end 11 described in the utility model.
Embodiment：
The utility model is described in further detail by way of example and in conjunction with the accompanying drawings.
Embodiment：
The agent structure of the miniature uplift pile anti-pulling capacity experimental rig of fiber bar described in the present embodiment includes expanding head height
Hale and pull out screw rod 1, high-strength nut 2, the first billet 3, load sensor 4, the second billet 5, reaction beam 6, the 3rd billet
7th, beam stool 8, jack 9, jack pad 10, fiber bar tapered end 11, fiber bar 12, stirrup 13, stake holes 14, displacement transducer
15th, magnetic stand 16, datum line beam 17 and buttress 18；The high-strength drawing screw rod 1 of enlarged footing is by screw rod shaft and bottom enlarged footing group
Into rigid solid structure, the diameter of screw rod shaft determines by the bearing capacity of miniature uplift pile, about 60~80mm, and enlarged footing is in circle
Plate-like, thickness 50mm, edge are formed with some holes, and its hole diameter is determined by the diameter of fiber bar 12, are available for it through peace
Dress；The high-strength nut 2 of hexagon cylindrical structure is connected to the outer surface of enlarged footing high-strength bolt 1 in a manner of screw thread couple,
Multiple be used in series can provide enough counter-forces；The length of side of first billet 3 of square structure is 20cm, thickness 3cm, center
Hole is formed with, the hole diameter is slightly larger than the diameter of enlarged footing high-strength bolt 1, the top of the first billet 3 and the phase of high-strength nut 2
Even, lower end is connected with load sensor 4；Load sensor 4 is punching structure, is intuitively shown by external supporting digital indicator
Show the load of application, the bottom of load sensor 4 is connected with the second billet 5；The length of side of the second billet 5 of square structure is 30cm
× 30cm, thickness 3cm, center are formed with hole, and its hole diameter is slightly larger than the diameter of enlarged footing high-strength bolt 1, the second steel pad
The bottom of plate 5 is connected with reaction beam 6；Reaction beam 6 is welded into box structure using thickness 3cm steel plate, and its span is 1.8m, width
For 30cm, a height of 60cm, reaction beam 6 sets a number of longitudinal stiffener along span direction, it is ensured that reaction beam has enough
Rigidity and stability, UNICOM's hole is reserved with the upper lower flange of span centre reaction beam 6, and hole diameter will be easy to the high-strength spiral shell of enlarged footing
The screw rod shaft of bar 1 passes freely through；Jack pad 10 is symmetrically disposed at the both sides of stake holes 14, not small with the distance at the edge of stake holes 14
In 50cm, to avoid experimental rig sedimentation is excessive from causing test data inaccurate；The bottom of jack 9 is arranged on jack pad
10 centers, the 3rd billet 7 is close at top, and positioned at the center of the 3rd billet 7, two jack 9 are model of the same race, and can
Enough pulling capacities are provided, jack 9 is connected with its supporting high-pressure oil pump, separating valve with high-pressure oil pipe during drawing, realized
Synchronization of jacking up reaction beam 6；The structure of 3rd billet 7 is identical with the second billet 5, and the 3rd billet 7 is placed in into thousand during use
Between jin top 9 and reaction beam 6；The cuboid opening lattice configured construction that beam stool 8 is welded into for shaped steel, a length of 40cm, a width of 30cm,
A height of 40cm, ensure that the high-pressure oil pipe being connected with jack 9 that its side is set can pass freely through, beam stool 8 is placed on very heavy
Push up on backing plate 10, the 3rd billet 7 and jack 9 are respectively positioned on inside beam stool 8；The length of side of jack pad 10 of square structure is
50cm, thickness 3cm, its bottom surface are connected with the levelling sand bedding course that ground is laid in advance；Fiber bar 12 and stirrup 13 are glass
Fibre reinforced plastics (GFRP) full thread solid rod-like structure, for the cohesion of reinforcing fiber muscle and concrete, in stake holes 14
Interior stirrup 13 is used together finer wire colligation in the shape of a spiral, with fiber bar 12 and is connected to form uplift pile fiber bar cage；In stake holes 14
Outer fiber muscle 12 through the circular hole reserved on the high-strength enlarged footing of drawing screw rod 1 of enlarged footing, fiber bar tapered end 11 and fiber bar 12 with
The mode of screw thread couple is anchored on the high-strength drawing screw rod 1 of enlarged footing, in addition, the seam between fiber bar tapered end 11 and fiber bar 12
Drop has AB glue or fiber bar tapered end 11 is dipped in into glue and then is screwed on fiber bar 12 in gap, to provide enough anchor forces；Fiber bar
Tapered end 11 is internal thread rim of a cup type nut, and its material is identical with fiber bar 12, and inner surface is glutinous sand mold, is made with the increase of load
Fiber bar 12 is locked more and more tight, and its height determines according to Ultimate Bearing Capacity of Tension Piles, and leaves 1.2 times of safety coefficient；Position
Displacement sensor 15 is optical signal displacement meter, is symmetrically mounted on the stake top both sides of the miniature uplift pile of fiber bar, and displacement transducer 15 is logical
Magnetic stand 16 is crossed to be fixedly mounted on datum line beam 17；Datum line beam 17 is channel-section steel, positioned at the both sides of stake holes 14, the both ends of datum line beam 17
It is respectively supported on buttress 18, the installation method of datum line beam 17 meets《Architecture foundation pile inspection specifications》(JGJ106-2014)
It is required that；Buttress 18 is the cuboid prefabricated components of concreting, and its upper surface is connected with datum line beam 17, lower surface and ground phase
Even.
The present embodiment realizes that the detailed process of the miniature uplift pile anti-pulling capacity test of fiber bar is：
(1) uplift pile fiber bar cage is made, fiber bar 12 is first passed through into tie hoop 13 one by one, then will with tied silk
The banding fixed of fiber bar 12 forms uplift pile fiber bar cage, 13 respective spacing of fiber bar 12 and stirrup on tie hoop 13
It need to meet existing specification and design requirement with diameter；
(2) by after levelling of the land, first both drilled with down-the-hole drill in fixed pile, forming stake holes 14 and check stake holes 14
Aperture and hole depth, then the lifting of uplift pile fiber bar cage is transferred in stake holes 14, ensure that fiber bar cage is located at the center of stake holes 14, and
With enough protective layer thickness, then casting concrete (intensity of concrete should meet design requirement) from bottom to top, vibrate
Floating stake top after closely knit, concrete test block is made with the conditions of, and whether the intensity for detecting concrete test block meets to require；
(3) after conserving 28 days, loading device is installed, first in the miniature lateral extent pile center at least 50cm of uplift pile two of fiber bar
Position lay 5cm thickness sand bedding course and levelling respectively, ensure that its compactness and rigidity can support top loading device enough, will not
Sedimentation is produced in loading procedure, is then sequentially placed jack pad 10, jack 9, the 3rd steel from bottom to top in the position
Backing plate 7, beam stool 8 and reaction beam 6, while will be enlarged by head height and hale pulling out screw rod 1 and passing through reaction beam 6, in the high-strength drawing spiral shell of enlarged footing
The second billet 5, load sensor 4, the first billet 3, high-strength nut 2 are passed through into the high-strength drawing spiral shell of enlarged footing successively on bar 1
The placed on top of bar 1, rotation high-strength nut 2 adjust the position of the high-strength bottom enlarged footing of drawing screw rod 1 of enlarged footing, now, use fiber
Fiber bar 12 overhanging on the ground is fixed on the high-strength bottom of drawing screw rod 1 of enlarged footing and expanded by muscle tapered end 11 in a manner of screw thread couple
The reserving hole position of major part, high-strength nut 2 finally is tightened with torque spanner, to ensure that enlarged footing is high-strength in whole installation process
The bottom enlarged footing level of drawing screw rod 1 and the uniform stressed of fiber bar 12, and enlarged footing high-strength bolt 1, the first billet 3, lotus
Retransmit sensor 4, the second billet 5 and reaction beam 6 the centre of form on the same line, two jack 9 make a concerted effort center line with it is fine
The cross section centre of form overlapping of axles of the miniature uplift pile of muscle is tieed up, so that the miniature uplift pile uniaxial force of fiber bar；
(4) bearingtest of the miniature uplift pile of fiber bar is carried out, branch is symmetrically put in the miniature uplift pile both sides of fiber bar
Pier 18, datum line beam 17 are arranged on buttress 18, then install magnetic stand 16 and displacement transducer 15, its middle position in datum line beam 17
Displacement sensor 15 is symmetrically installed on the miniature uplift pile stake top of fiber bar, except ensuring that datum line beam 17, displacement transducer 15 do not occur
Outside rocking, test device will also meet《Architecture foundation pile inspection specifications》(JGJ106-2014) requirement, by load sensor
4 are connected on external Acquisition Instrument, and jack 9 passes through supporting high-pressure oil pipe and supporting high-pressure oil pump and the close phase of separating valve
Even, precharge checks whether load sensor, displacement transducer and loading device are working properly, until the reading of load sensor 4
Number reaches 5kN, it was demonstrated that loading device has contacted the miniature uplift pile anti-pulling capacity of close rear beginning test data sheet fiber bar and stake
The amount of pulling out on body.
Claims (1)
1. a kind of miniature uplift pile anti-pulling capacity test device of fiber bar, it is characterised in that it is high-strength that agent structure includes enlarged footing
Drawing screw rod, high-strength nut, the first billet, load sensor, the second billet, reaction beam, the 3rd billet, beam stool, thousand
Jin top, jack pad, fiber bar tapered end, fiber bar, stirrup, stake holes, displacement transducer, magnetic stand, datum line beam and buttress；
The high-strength drawing screw rod of enlarged footing is the rigid solid structure that is made up of screw rod shaft and bottom enlarged footing, the diameter of screw rod shaft by
The bearing capacity of miniature uplift pile is defined as 60~80mm, and enlarged footing is in the form of annular discs, and thickness 50mm, edge is formed with some holes,
Hole diameter determined by the diameter of fiber bar, and empty quantity is determined according to being actually needed；The high-strength spiral shell of hexagon cylindrical structure
Mother is connected to the outer surface of enlarged footing high-strength bolt in a manner of screw thread couple, and the length of side of the first billet of square structure is
20cm, thickness 3cm, center are formed with hole, and the hole diameter is more than the diameter of enlarged footing high-strength bolt, the first billet top
It is connected with high-strength nut, lower end is connected with load sensor；Load sensor is punching structure, load sensor bottom and second
Billet is connected；The second billet length of side of square structure is 30cm × 30cm, thickness 3cm, and center is formed with hole, its hole
Diameter is more than the diameter of enlarged footing high-strength bolt, and the bottom of the second billet is connected with reaction beam；Reaction beam is using thickness 3cm's
Steel plate is welded into box structure, and its span is 1.8m, a width of 30cm, a height of 60cm, and reaction beam sets a fixed number along span direction
The longitudinal stiffener of amount, for the quantity of longitudinal stiffener according to determination is actually needed, the upper lower flange of span centre reaction beam is reserved with connection
Via holes, jack pad are symmetrically disposed at the both sides of stake holes, are not less than 50cm, the bottom of jack with the distance at stake holes edge
Installed in jack pad center, the 3rd billet is close at top, and positioned at the 3rd billet center, two jack are of the same race
Model, the structure of the 3rd billet is identical with the second billet, and the 3rd billet is placed between jack and reaction beam during use；
The cuboid opening lattice configured construction that beam stool is welded into for shaped steel, a length of 40cm, a width of 30cm, a height of 40cm, beam stool are placed on
On jack pad, the 3rd billet and jack are respectively positioned on inside beam stool；The jack pad length of side of square structure is 50cm,
Thickness is 3cm, and its bottom surface is connected with the levelling sand bedding course that ground is laid in advance；Fiber bar and stirrup are glass fiber reinforcement modeling
Expect full thread solid rod-like structure, stirrup in the shape of a spiral, is used together finer wire colligation with fiber bar and is connected to be formed in stake holes
Uplift pile fiber bar cage；The circular hole reserved on the high-strength drawing screw rod enlarged footing of enlarged footing, fiber bar are passed through in stake holes outer fiber muscle
Tapered end is anchored on the high-strength drawing screw rod of enlarged footing with fiber bar in a manner of screw thread couple, between fiber bar tapered end and fiber bar
Gap in drop have AB glue or dip in fiber bar tapered end and glue and then be screwed on fiber bar, fiber bar tapered end is internal thread rim of a cup type spiral shell
Mother, its material is identical with fiber bar, and inner surface is glutinous sand mold, and displacement transducer is optical signal displacement meter, is symmetrically mounted on fiber
The stake top both sides of the miniature uplift pile of muscle, displacement transducer are fixedly mounted on datum line beam by magnetic stand；Datum line beam is channel-section steel,
Positioned at stake holes both sides, the both ends of datum line beam are respectively supported on buttress, and buttress is the cuboid prefabricated components of concreting, its
Upper surface is connected with datum line beam, and lower surface is connected with ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721282766.9U CN207211221U (en) | 2017-09-30 | 2017-09-30 | Miniature anti-floating pile resistance to plucking bearing capacity testing arrangement of fibre muscle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505550A (en) * | 2018-04-28 | 2018-09-07 | 青岛理工大学 | Drawing test device for single-anchor fiber rib anti-floating anchor rod system |
| CN109520838A (en) * | 2018-12-25 | 2019-03-26 | 西南交通大学 | A kind of shield tunnel screwed joint tensile property experimental rig |
-
2017
- 2017-09-30 CN CN201721282766.9U patent/CN207211221U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505550A (en) * | 2018-04-28 | 2018-09-07 | 青岛理工大学 | Drawing test device for single-anchor fiber rib anti-floating anchor rod system |
| CN109520838A (en) * | 2018-12-25 | 2019-03-26 | 西南交通大学 | A kind of shield tunnel screwed joint tensile property experimental rig |
| CN109520838B (en) * | 2018-12-25 | 2023-12-15 | 西南交通大学 | Tensile property test device for shield tunnel bolt joint |
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Granted publication date: 20180410 |