CN205655948U - Contrast tunnel dynamometry lock foot anchor pipe test performance's device - Google Patents
Contrast tunnel dynamometry lock foot anchor pipe test performance's device Download PDFInfo
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- CN205655948U CN205655948U CN201620452171.2U CN201620452171U CN205655948U CN 205655948 U CN205655948 U CN 205655948U CN 201620452171 U CN201620452171 U CN 201620452171U CN 205655948 U CN205655948 U CN 205655948U
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- foot anchor
- force
- anchor tube
- locking foot
- measuring locking
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Abstract
The utility model relates to a contrast tunnel dynamometry lock foot anchor pipe test performance's device. The utility model discloses simple to operate, easily operation can be verified the test performance who buries fiber grating dynamometry lock foot anchor pipe underground fast, can be used to similar measuring force device test performance's such as multiple tubular, rod -type measuring. The utility model discloses a technical scheme include: loading ring and the support frame used when burying fiber grating's dynamometry lock foot anchor pipe, the dynamometry lock foot anchor pipe of pasting resistance strain gauge and contrast underground.
Description
Technical field
This utility model relates to a kind of device contrasting tunnel force-measuring locking foot anchor tube test performance.
Background technology
Entered since 21 century, Chinese society economy and scientific and technological level continuous progressive, along with " band one tunnel " and
The proposition of " Maritime Silk Road " two big economy-zone strategy, the construction of the major motor vehicle engineerings such as bridge, tunnel, dam, highway takes
Obtained swift and violent development.For tunnel construction, not only its quantity and scale have expanded, and its excavated section is also constantly increasing
Greatly, the difficult problem run into also gets more and more.For the tunnel construction under complex geological condition, its problems faced is on the increase.As
In Support System in Soft Rock Tunnels digging process, owing to self is poor, if tunnel supporting method is chosen improper, often cause
Tunnel structure deformation instability even caves in, and therefore reasonably supporting structure system is the important guarantor of tunnel construction and operation security
Barrier.Lock foot anchor tube build as Support System in Soft Rock Tunnels in a kind of supporting means, due to its simple in construction, easily operated, economic
Practicality, sinks to deforming and serve vital effect in terms of structural stability controlling Tunnel, therefore locks foot
Anchor tube is widely used in Support System in Soft Rock Tunnels engineering construction.But have and shut foot anchor tube mechanical characteristic and the research of the mechanism of action
The most fewer, great majority are still analyzed by the method for engineering experience analogy and numerical simulation, and do so will necessarily be to tunnel
Certain potential safety hazard is buried in road construction, causes the waste of national resources, therefore to lock foot anchor tube mechanical characteristic and force-mechanism
Research imperative.
The monitoring means of existing lock foot anchor tube mechanical characteristic, the force-measuring locking foot anchor tube of such as adhering resistance strain sheets, when
It is applied to job site and carries out there is shortcomings during long term monitoring, is embodied in: in the construction environment that humidity is changeable
Middle test data are difficult to maintain a long-term stability, and easily by electromagnetic interference, test data are discontinuous, and error is big, it is difficult to realize long-term prison
Survey.
But before fiber grating sensing technology is applied to tunnel lock foot anchor tube mechanical characteristic test, be very difficult to judge it
The feasibility of testing experiment and the accuracy of test data, it is seen that seek a kind of control methods to its verify important
Property.
Utility model content
The purpose of this utility model is to provide a kind of device contrasting tunnel force-measuring locking foot anchor tube test performance, and it utilizes this
Device and method of testing thereof demonstrate that to bury fiber grating force-measuring locking foot anchor tube underground more stable in test process effectively, and survey
Examination data more accurately and reliable, are applied to job site measurement provide well for burying fiber grating force-measuring locking foot anchor tube underground
Foundation.
For solving the problem that prior art exists, the technical solution of the utility model is: a kind of contrast tunnel force-measuring locking foot
The device of anchor tube test performance, it is characterised in that: include that force-measuring locking foot anchor tube, the two ends of described force-measuring locking foot anchor tube are put respectively
Being placed on bracing frame, the pipe shaft of described force-measuring locking foot anchor tube is arranged with loading annulus, the underface loading annulus hangs
Counterweight.
Using two rectangular steel pipe vertical weldings to be connected into T-shape bottom described bracing frame, its upper vertical is welded with cylinder
Shape steel pipe one, the plan vertical welding steel cylindrical tube two of steel cylindrical tube one, steel cylindrical tube two upper vertical welds two
Cylindrical steel rods, the distance between two cylindrical steel rods is identical with the external diameter of force-measuring locking foot anchor tube.
The described top loading annulus arranges porose, is provided with bolt in hole, and the Basolateral connection loading annulus has
Nut.
Described force-measuring locking foot anchor tube includes two kinds, respectively buries force-measuring locking foot anchor tube and the adhering resistance of fiber grating underground
The force-measuring locking foot anchor tube of foil gauge.
Compared with prior art, advantage of the present utility model is as follows:
1, this utility model is based on pin-ended simply supported beam by loading characteristic during Concentrated load, carries targetedly
Go out a kind of method contrasting force-measuring locking foot anchor tube test performance.
2, this utility model installation method is simple, easily operated, economical and practical, can be widely used in contrasting laying optical fiber
The test performance of the analog structures such as the tubular type of grating or rod-type.
3, this utility model is by by force-measuring locking foot anchor tube pin-ended, and in its pipe shaft some place's applying load,
Simulate simply supported beam by stressing conditions during Concentrated load.The method can be checked quickly and efficiently and bury fiber grating lock underground
The feasibility that foot anchor tube device for measuring force is applied in Practical Project, and the accuracy of test result.
4, test result of the present utility model is applied to Practical Project for the lock foot anchor tube device for measuring force of fiber grating afterwards and carries
For good theoretical foundation and support.
Accompanying drawing explanation
The structural representation of Fig. 1 this utility model device；
Fig. 2 this utility model support frame structure schematic diagram；
Fig. 3 this utility model loads the structural representation of annulus；
Fig. 4 this utility model buries fiber grating lock foot anchor tube device for measuring force schematic diagram underground；
Fig. 5 this utility model buries fiber grating lock foot anchor tube device for measuring force sectional drawing underground；
Fig. 6 this utility model adhering resistance strain sheets lock foot anchor tube device for measuring force schematic diagram；
Fig. 7 this utility model band compensates 1/4 bridge and connects resistor straining testing instrument schematic diagram；
In Fig. 8 this utility model contrast test, force-measuring locking foot anchor tube is by stress schematic diagram during Concentrated load；
Force-measuring locking foot anchor tube stress bending moment diagram in Fig. 9 this utility model contrast test；
Description of reference numerals: 1 lock foot anchor tube body, 2 circular holes one, 3 elongated slots, 4 circular holes two, 5 optical cables, 6
Bare fibre, 7 fiber Bragg grating (FBG) demodulators, 8 resistance strain gages, 9 wires, 10 resistor straining testing instrument, 11 bracing frames,
12 load annulus, 13 counterweights, 14 nuts, 15 bolts, 16 rectangular steel pipes, 17 steel cylindrical tube one, 18 circles
Cylindrical steel two, 19 cylindrical steel rods, 20 force-measuring locking foot anchor tubes.
Detailed description of the invention
Combine accompanying drawing below by embodiment the design is described in detail:
See Fig. 1 Fig. 3: a kind of device contrasting tunnel force-measuring locking foot anchor tube test performance, it is characterised in that: include surveying
Power lock foot anchor tube 20, the two ends of described force-measuring locking foot anchor tube 20 are respectively placed on bracing frame 11, described force-measuring locking foot
Being arranged with loading annulus 12 on the pipe shaft of anchor tube 20, the underface loading annulus 12 hangs counterweight 13 by line.
See Fig. 2: use two rectangular steel pipe 16 vertical weldings to be connected into T-shape bottom described bracing frame 11, hang down above it
Directly it is welded with steel cylindrical tube 1, the plan vertical welding steel cylindrical tube 2 18 of steel cylindrical tube 1, steel cylindrical tube
2 18 upper vertical two cylindrical steel rods 19 of welding, the distance between two short circular rod irons 19 and force-measuring locking foot anchor tube 20
External diameter is identical.
See Fig. 3: the described top loading annulus 12 arranges porose, is provided with bolt 15 in hole, loads annulus 12
Basolateral connects nut 14.
Described force-measuring locking foot anchor tube 20 includes two kinds, respectively buries the force-measuring locking foot anchor tube of fiber grating underground and pastes electricity
The force-measuring locking foot anchor tube of resistance foil gauge.
See Fig. 4 Fig. 5: the structure of the force-measuring locking foot anchor tube burying fiber grating underground and include locking foot anchor tube body 1, described
One end of lock foot anchor tube 1 is provided with conehead, and the pipe shaft of described lock foot anchor tube 1 is provided with symmetrical 4 along length of tube direction
The axis of individual 3,4 elongated slots 3 of elongated slot is parallel, and the two ends of each elongated slot 3 are provided with circular hole 1 and circular hole 24, in each elongated slot
Being equipped with bare fibre 6 by circular hole 1 and circular hole 24, the two ends of described bare fibre 6 stretch out in outside lock foot anchor tube 1, in elongated slot
Bare fibre on be provided with several gratings, the bare fibre 6 outside elongated slot carry out armouring formed optical cable 5, described optical cable 5 and optical fiber
Grating demodulation instrument 7 connects, and the position that the spacing distance between each adjacent gratings respectively tests section according to lock foot anchor tube is arranged, elongated slot
Scribble space flight glue and marine glue successively on interior bare fibre 6, the bare fibre 6 in elongated slot is arranged with Loose tube.
The fiber grating sensing technology that optical fiber communication technology grows up is strong, waterproof except having anti-electromagnetic interference capability
Moisture protection is strong, outside sensitivity and the high advantage of stability, also have information gathering and be transmitted in feature integrally, it is possible to achieve
Distributed measurement.
See the force-measuring locking foot anchor tube of Fig. 6, Fig. 7: adhering resistance strain sheets: include locking foot anchor tube body 1, described lock foot
One end of anchor tube body 1 is provided with conehead, four, the section part upper and lower, left and right of pipe shaft test of described lock foot anchor tube body 1
Position adhering resistance strain sheets 8 respectively, resistance strain gage 8 welding lead 9, the other end of wire 9 is according to the 1/4 of band temperature-compensating
Bridge connection connects resistor straining testing instrument 10.
This utility model is by being placed in force-measuring locking foot anchor tube on test device, and carries out multistage loadings, carrys out relative analysis
The test performance of two kinds of force-measuring locking foot anchor tubes.
This utility model specific implementation method is:
(1) first, a force-measuring locking foot anchor tube burying fiber grating underground, the force-measuring locking of an adhering resistance strain sheets are prepared
Foot anchor tube, the paste position of resistance strain gage is identical with the installation position holding in optical fiber grid region, and two lock foot anchor tubes use
Same specification, model, the hot rolled seamless steel tube of batch；Then, make a secondary bracing frame for supporting force-measuring locking foot anchor tube, come
The hinged-support at simulation simply supported beam two ends, makes a loading annulus with bolt nut, applies to concentrate for force-measuring locking foot anchor tube
During load used.Described bracing frame uses rectangular steel pipe, round steel pipe one, round steel pipe two to be jointly welded, by two
Isometric rectangular steel pipe vertical welding is as the base of whole bracing frame, and vertical welding round steel pipe one on base, circular
Weld round steel pipe two, two cylindrical steel rods of vertical welding on round steel pipe two on steel pipe one, lock foot anchor for limiting measuring force
Pipe rotates.The described diameter diameter slightly larger than force-measuring locking foot anchor tube loading annulus with bolt nut, loads annulus
Surface boring tapping, and bolt head is carried out polishing sharpening, WELD NUTS immediately below annulus, it is used for hanging during loading used
Counterweight.
(2) mounting test system.First, choosing one piece of smooth place, and be well placed by bracing frame, two bracing frames must
Must be on same horizontal line, it is impossible to rock；Then, the loading annulus with bolt nut is placed on force-measuring locking foot anchor tube pipe
Body, and force-measuring locking foot anchor tube is positioned on bracing frame, it is ensured that force-measuring locking foot anchor tube pipe shaft position directly below and bracing frame top
The steel cylindrical tube one of end is the most tangent；Finally, respectively force-measuring locking foot anchor tube is connected to test instrunment, and is connected to computer.
When force-measuring locking foot anchor tube being carried out loading test by electrical measuring method, by pasting electricity at force-measuring locking foot anchor tube pipe shaft different cross section
Resistance foil gauge, and utilize resistor straining testing instrument to use 1/4 ridge method of resistance strain gage band temperature-compensating to test lock foot anchor
Manage the strain value at each measuring point, use a bit of lock foot anchor tube adhering resistance with the force-measuring locking same batch of foot anchor tube, model to answer
Become sheet and be used as temperature compensation means；When force-measuring locking foot anchor tube being carried out loading test by flash spotting, by lock foot anchor tube
Bare optical fibers and bare optical gratings is buried in pipe shaft cutting underground, utilizes fiber Bragg grating (FBG) demodulator to connect fiber-optical grating temperature sensor to compensate force-measuring locking foot
The wavelength change that at each measuring point of anchor tube, load action causes, and convert thereof into the dependent variable at each measuring point.
(3) force-measuring locking foot anchor tube is loaded.First, carry out the force-measuring locking foot anchor tube burying fiber grating underground loading surveying
Examination, slides into loading position set in advance by loading annulus, and rotating ring makes bolt head be directed at force-measuring locking foot anchor tube pipe shaft
Surface.Then on the nut loading below annulus, hang counterweight, the force-measuring locking foot anchor tube burying fiber grating underground is carried out by
Level loads, and is gathered the variable quantity of its wavelength by fiber Bragg grating (FBG) demodulator.Finally should to adhering resistance by above-mentioned loading method
The force-measuring locking foot anchor tube becoming sheet carries out loading test.
(4) the test data of force-measuring locking foot anchor tube are analyzed with theoretical value.The force-measuring locking being placed on bracing frame
Foot anchor tube is considered as simply supported beam and is acted on by load F, and its force diagram, bending moment diagram are the most as shown in Figure 8 and Figure 9.
For beam AC section: its moment of flexure is (0<x<α)
For beam BC section: its moment of flexure is (α<x<l)
Stress value for anchor tube pipe shaft each pointWherein y be lock the foot each measuring point of anchor tube pipe shaft away from neutral axis away from
From.
Wherein:Wherein D is the external diameter of force-measuring locking foot anchor tube, and d is internal diameter.
Then the strain of corresponding each measuring point can be tried to achieve:
Owing to the y value at the force-measuring locking foot anchor tube pipe shaft leftmost side, rightmost side measuring point is 0, at top side, lower side measuring point
Y value equal, i.e. theoretical strain value ε at the force-measuring locking foot anchor tube leftmost side, rightmost side measuring pointLeft=εRight=0, top side, under
Theoretical strain value at the measuring point of side
Claims (4)
1. the device contrasting tunnel force-measuring locking foot anchor tube test performance, it is characterised in that: include force-measuring locking foot anchor tube (20),
The two ends of described force-measuring locking foot anchor tube (20) are respectively placed on bracing frame (11), described force-measuring locking foot anchor tube (20)
Being arranged with loading annulus (12) on pipe shaft, the underface loading annulus (12) hangs counterweight (13).
A kind of device contrasting tunnel force-measuring locking foot anchor tube test performance the most according to claim 1, it is characterised in that: institute
Bracing frame (11) bottom stated uses two rectangular steel pipe (16) vertical weldings to be connected into T-shape, and its upper vertical is welded with cylinder
Steel pipe one (17), the plan vertical welding steel cylindrical tube two (18) of steel cylindrical tube one (17), in steel cylindrical tube two (18)
Side's two cylindrical steel rods (19) of vertical welding, the distance between two cylindrical steel rods (19) and force-measuring locking foot anchor tube (20)
External diameter is identical.
A kind of device contrasting tunnel force-measuring locking foot anchor tube test performance the most according to claim 1 and 2, its feature exists
In: the top of described loading annulus (12) arranges porose, is provided with bolt (15) in hole, loads the Basolateral of annulus (12)
Connect and have nut (14).
A kind of device contrasting tunnel force-measuring locking foot anchor tube test performance the most according to claim 3, it is characterised in that: institute
Force-measuring locking foot anchor tube (20) stated includes two kinds, respectively buries force-measuring locking foot anchor tube and the adhering resistance strain sheets of fiber grating underground
Force-measuring locking foot anchor tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620452171.2U CN205655948U (en) | 2016-05-18 | 2016-05-18 | Contrast tunnel dynamometry lock foot anchor pipe test performance's device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620452171.2U CN205655948U (en) | 2016-05-18 | 2016-05-18 | Contrast tunnel dynamometry lock foot anchor pipe test performance's device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205655948U true CN205655948U (en) | 2016-10-19 |
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ID=57402927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620452171.2U Active CN205655948U (en) | 2016-05-18 | 2016-05-18 | Contrast tunnel dynamometry lock foot anchor pipe test performance's device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205655948U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105890829A (en) * | 2016-05-18 | 2016-08-24 | 长安大学 | Device for comparing test performance of force measuring locking anchor pipes of tunnel and test method |
| CN106570271A (en) * | 2016-11-04 | 2017-04-19 | 长安大学 | Stress analysis method for locking anchor pipe under variable foundation coefficient |
-
2016
- 2016-05-18 CN CN201620452171.2U patent/CN205655948U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105890829A (en) * | 2016-05-18 | 2016-08-24 | 长安大学 | Device for comparing test performance of force measuring locking anchor pipes of tunnel and test method |
| CN105890829B (en) * | 2016-05-18 | 2018-07-20 | 长安大学 | A kind of device and test method of comparison tunnel force-measuring locking foot anchor tube test performance |
| CN106570271A (en) * | 2016-11-04 | 2017-04-19 | 长安大学 | Stress analysis method for locking anchor pipe under variable foundation coefficient |
| CN106570271B (en) * | 2016-11-04 | 2020-05-19 | 长安大学 | Stress analysis method for variable foundation coefficient lower lock leg anchor pipe |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |