CN107560950A - A kind of prestressed anchor shear stress on interface measurement apparatus and its test method - Google Patents
A kind of prestressed anchor shear stress on interface measurement apparatus and its test method Download PDFInfo
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- CN107560950A CN107560950A CN201710908216.1A CN201710908216A CN107560950A CN 107560950 A CN107560950 A CN 107560950A CN 201710908216 A CN201710908216 A CN 201710908216A CN 107560950 A CN107560950 A CN 107560950A
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- foil gauge
- rod
- pvc pipe
- fine steel
- steel rib
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- 238000005259 measurement Methods 0.000 title claims abstract description 22
- 238000010998 test method Methods 0.000 title claims description 14
- 239000011888 foil Substances 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 239000011435 rock Substances 0.000 claims abstract description 32
- 239000011449 brick Substances 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 125000006850 spacer group Chemical group 0.000 claims abstract description 3
- 239000004568 cement Substances 0.000 claims description 6
- 238000004078 waterproofing Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
A kind of prestressed anchor shear stress on interface measurement apparatus,Including the body of rod,The pvc pipe in parallel for being provided for wire remittance above the body of rod,It is connected with pvc pipe and is nested at least one pvc pipe ring of body of rod outside spacers setting,Described pvc pipe ring both sides are respectively arranged with rectangle hole slot,The body of rod includes the grouted part for stretching into country rock and the free segment for stretching out country rock,Body of rod both sides are pasted with foil gauge I respectively corresponding to the position for being each provided with pvc pipe ring,And the position is hinged with fine steel rib,Foil gauge I is distributed on the grouted part of the body of rod according to test requirements document,Fine steel rib draws the strain brick for being pasted with foil gauge II to body of rod both sides respectively,And foil gauge II is towards interface to be measured,Pvc pipe ring is provided with the preformed hole that wire passes through with pvc pipe contact site,External deformeter is connected to foil gauge I and foil gauge II by wire.Help is provided for preferably research ground prestressed anchor fixing structure long-term safety and durability.
Description
Technical field
The invention belongs to measurement apparatus and test method field, and in particular to a kind of prestressed anchor shear stress on interface measurement
Device and its test method.
Background technology
Ground prestressed anchor fixing structure is as a kind of buried high stress structure in underground, once there is bad, knot of constructing
The problems such as structure fails, progress consolidation process is extremely difficult, therefore not only to consider it stability under the conditions of normal operation
Problem, more to consider its long-term durability issues.Two interfaces on prestressed anchor fixing structure grouted part be present：(1) body of rod
Interface between injecting cement paste；(2) interface between injecting cement paste and country rock body.Research shows that external load acts on anchor in lower beam body
Gu segment limit face shear stress distribution regularities directly affect its anchoring effect and durability.
Prestressed anchor shear stress on interface measurement apparatus can be applied to research such as anchor pole rigidity, prestressing force size, circulation
The factors such as load, injecting cement paste intensity influence on the distribution of grouted part shear stress on interface and Evolution, or the scene by acquisition
Monitoring Data is used as destruction position or the anchor system failure damage mould being most likely to occur to prestress anchoraging structure grouted part
On formula judges.For ground prestressed anchor fixing structure, due to the complexity and disguise of its structure, at present still without it is simple, have
The measurement apparatus and its test method dedicated for ground prestressed anchor shear stress on interface in Practical Project of effect.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of prestressed anchor shear stress on interface measurement apparatus and its test method.
To solve the above problems, the technical scheme that the present invention takes is：A kind of prestressed anchor shear stress on interface measurement dress
Put, including the body of rod, the body of rod above it is in parallel be provided for wire remittance pvc pipe, pvc pipe as pvc pipe ring positioning with
The counter-force support of pvc pipe ring during the tensioning body of rod, between laying and protecting wire, be connected and be nested on the outside of the body of rod with pvc pipe
Every at least one pvc pipe ring of setting, for protecting strain testing element foil gauge I, described pvc pipe ring both sides are set respectively
Have for the rectangle hole slot through fine steel rib, to outside country rock during the tensioning body of rod, rectangle hole slot can realize strutting for fine steel rib, the body of rod
Including stretching into the grouted part of country rock and stretching out the free segment of country rock, body of rod both sides correspond to the position for being each provided with pvc pipe ring
Put and be pasted with the foil gauge I as testing element respectively, and the position is hinged with fine steel rib, foil gauge I is according to test requirements document point
It is distributed on the grouted part of the body of rod, fine steel rib draws the strain brick for being pasted with foil gauge II, and foil gauge to body of rod both sides respectively
II towards interface to be measured, and fine steel rib is " umbrella " type framework supporting structure, in " fishbone " shape, pvc pipe ring and pvc pipe contact site
Position is provided with the preformed hole that wire passes through, and external deformeter is connected to foil gauge I and foil gauge II by wire.
Described foil gauge II is three-dimensional foil gauge, and therein two are mutually perpendicular to foil gauge, another to be located to foil gauge
On angular bisector, external deformeter is often connected to by wire to foil gauge.
Described strain brick be respectively arranged at every fine steel rib stage casing and fine steel rib close to one end of country rock.
Described body of rod side in the horizontal direction and bottom be vertically respectively arranged with it is Parabolic to medium-height trestle,
Two bottoms of support prop up the body of rod, country rock is withstood on top, to keep the present apparatus to be centrally located in wall rock drill-hole.
Described pvc pipe ring is fixedly connected by screw and fixing bolt with pvc pipe, on pvc pipe ring with pvc pipe contact site
Position is provided with screw I, and diametrically through there is screw II corresponding with screw I on pvc pipe.
The test method of prestressed anchor shear stress on interface measurement apparatus specifically comprises the following steps：
S1, Rock And Soil drilling；
S2, according to test requirements document, the body of rod both sides foil gauge I is pasted respectively, foil gauge I is pasted quantity and distributing position symbol
Close and require, and water-proofing treatment is carried out to foil gauge I, such as in the surface smear waterproof material of foil gauge I；
S3, pvc pipe ring is set according to stickup quantity and the distributing position connection of foil gauge I on the outside of pvc pipe, made on the body of rod
Each position for being pasted with foil gauge I is corresponding with pvc pipe ring.
S4, the body of rod is nested in pvc pipe ring；
S5, fine steel rib are hinged through rectangle hole slot and body of rod both sides, and fine steel rib is tightening state, is installed on fine steel rib
The strain brick of foil gauge II is pasted with, and water-proofing treatment is carried out to foil gauge II.
S6, wire are laid along pvc pipe, and pvc pipe is used to laying and protecting wire, and external deformeter is connected respectively by wire
It is connected to foil gauge I and foil gauge II；
S7, medium-height trestle will be respectively welded in body of rod side and bottom, and two bottoms of support is propped up the body of rod, top top
Firmly country rock；
S8, it will be pasted with the body of rod grouted part feeding wall rock drill-hole of foil gauge I；
S9, fixing PVC pipe, while the tensioning body of rod to outside country rock, under the cooperation of rectangle hole slot, fine steel rib is gradually opened up
Open, angle becomes larger between fine steel rib and the body of rod, and it is in divergent state to make fine steel rib, and reaches the foil gauge II on strain brick
Precalculated position；
S10, cement injection；
S11, by deformeter gather strain data, so as to obtain shear stress on interface value.
In described S5, strain brick be installed on fine steel rib stage casing and fine steel rib close to one end of country rock.
In described S5, strain brick side digs along longitudinal direction and takes semi-cylindrical recesses, spreading glue in groove, pastes fine steel rib
It is cementing with strain brick in groove；After 24 hours strain brick surface smear waterproof material, as AB glue (can hardening at subcritical temerature, bond
Property it is good, be usually used in collector surface and be sealing adhesive), foil gauge II position is accessed to strain brick surface and wire and carries out sealed insulation.
In described S3, pvc pipe ring is fixedly connected by fixing bolt with pvc pipe.
The invention provides a kind of prestressed anchor shear stress on interface measurement apparatus and its test method, by prestressing force
The monitoring of anchor structure shear stress on interface, it can aid in completing to its anchorage effect mechanism, failure damage mode decision etc.
Research work, it compensate for lacking dedicated for ground prestressed anchor shear stress on interface measurement apparatus and its experiment in Practical Project
The blank of method, also provide help for preferably research ground prestressed anchor fixing structure long-term safety and durability.
Brief description of the drawings
Fig. 1 is this measurement apparatus front view；
Fig. 2 is Fig. 1 A-A sectional views；
Fig. 3 is this measurement apparatus top view；
Fig. 4 is strain brick and the schematic diagram of foil gauge II；
Fig. 5 is the body of rod and the connection diagram of foil gauge I.
Wherein, 1, grouted part, 2, free segment, 3, country rock, 4, pvc pipe ring, 5, pvc pipe, 6, foil gauge I, 7, fine steel rib,
8th, to medium-height trestle, 9, drilling, 10, the body of rod, 11, strain brick, 12, wire, 13, fixing bolt, 14, foil gauge II, 15, rectangular opening
Groove.
Embodiment
As described in Figure, a kind of prestressed anchor shear stress on interface measurement apparatus, including the body of rod 10, the top of the body of rod 10 are put down with it
Row is provided for the pvc pipe 5 of the remittance of wire 12, is connected with pvc pipe 5 and is nested at least one of the outside spacers of the body of rod 10 setting
Pvc pipe ring 4, the described both sides of pvc pipe ring 4 are respectively arranged with rectangle hole slot 15, and the body of rod 10 includes the grouted part for stretching into country rock 3
1 and the free segment 2 of country rock 3 is stretched out, the both sides of the body of rod 10, which correspond to, to be each provided with the position of pvc pipe ring 4 and be pasted with strain respectively
Piece I 6, and the position is hinged with fine steel rib 7, foil gauge I 6 is distributed on the grouted part 1 of the body of rod 10 according to test requirements document, thin steel
Muscle 7 draws the strain brick 11 for being pasted with foil gauge II 14 to the both sides of the body of rod 10 respectively, and foil gauge II 14 is towards interface to be measured,
Pvc pipe ring 4 is provided with the preformed hole that wire 12 passes through with the contact site of pvc pipe 5, and external deformeter is connected respectively by wire 12
It is connected to foil gauge I 6 and foil gauge II 14.
Described foil gauge II 14 is three-dimensional foil gauge, and therein two are mutually perpendicular to foil gauge, another to foil gauge position
In on angular bisector, external deformeter is often connected to by wire 12 to foil gauge.
Described strain brick 11 be respectively arranged at every fine steel rib 7 stage casing and fine steel rib 7 close to one end of country rock 3.
The described side of the body of rod 10 is in the horizontal direction and bottom is vertically respectively arranged with Parabolic centering branch
Frame 8, two bottoms of support prop up the body of rod 10, country rock 3 is withstood on top.
Described pvc pipe ring 4 is fixedly connected by screw and fixing bolt 13 with pvc pipe 5, on pvc pipe ring 4 with pvc pipe 5
Contact site is provided with screw I, and diametrically through there is screw II corresponding with screw I on pvc pipe 5.
The test method of prestressed anchor shear stress on interface measurement apparatus specifically comprises the following steps：
S1, Rock And Soil drilling；
S2, according to test requirements document, foil gauge I 6 is pasted in the both sides of the body of rod 10 respectively, and carries out water-proofing treatment to foil gauge I 6,
Such as in the surface smear waterproof material of foil gauge I 6；
S3, stickup quantity and distributing position connection setting the pvc pipe ring 4 in the outside of pvc pipe 5 according to foil gauge I 6；
S4, the body of rod 10 is nested in pvc pipe ring 4；
S5, fine steel rib 7 are hinged through rectangle hole slot 15 with the both sides of the body of rod 10, and fine steel rib 7 is tightening state, in fine steel rib
Installation is pasted with the strain brick 11 of foil gauge II 14 on 7, and carries out water-proofing treatment to foil gauge II 14；
S6, wire 12 are laid along pvc pipe 5, and external deformeter is connected to foil gauge I 6 and strain by wire 12
Piece II 14；
S7, medium-height trestle 8 will be respectively welded in the side of the body of rod 10 and bottom, make support two bottoms prop up the body of rod 10,
Withstand country rock 3 in top；
S8, the grouted part 1 of the body of rod 10 for being pasted with foil gauge I 6 is sent into country rock 3 drilled in 9；
S9, fixing PVC pipe 5, while to the outer tensioning body of rod 10 of country rock 3, under the cooperation of rectangle hole slot 15, by fine steel rib 7
Gradually spread out, angle becomes larger between fine steel rib 7 and the body of rod 10, and it is in divergent state to make fine steel rib 7, and is made on strain brick 11
Foil gauge II 14 reaches precalculated position；
S10, cement injection；
S11, by deformeter gather strain data, so as to obtain shear stress on interface value.
In described S5, strain brick 11 be installed on fine steel rib 7 stage casing and fine steel rib 7 close to one end of country rock 3.
In described S5, the strain side of brick 11 digs along longitudinal direction and takes semi-cylindrical recesses, spreading glue in groove, makes fine steel rib
7 are attached in groove and to strain brick 11 cementing；In the strain surface smear waterproof material of brick 11, such as AB glue after 24 hours.
In described S3, pvc pipe ring 4 is fixedly connected by fixing bolt 13 with pvc pipe 5.
Claims (9)
- A kind of 1. prestressed anchor shear stress on interface measurement apparatus, it is characterised in that：Including the body of rod (10), above the body of rod (10) with Its pvc pipe (5) imported for wire (12) that be arranged in parallel, it is connected with pvc pipe (5) and is nested in the body of rod (10) outside spacers and set At least one pvc pipe ring (4) put, described pvc pipe ring (4) both sides are respectively arranged with rectangle hole slot (15), the body of rod (10) bag The grouted part (1) for stretching into country rock (3) and the free segment (2) for stretching out country rock (3) are included, the body of rod (10) both sides correspond to each set The position for having pvc pipe ring (4) is pasted with foil gauge I (6) respectively, and the position is hinged with fine steel rib (7), foil gauge I (6) basis Test requirements document is distributed on the grouted part (1) of the body of rod (10), and fine steel rib (7) is drawn to be pasted with and answered respectively to the body of rod (10) both sides Become the strain brick (11) of piece II (14), and foil gauge II (14) contacts towards interface to be measured, pvc pipe ring (4) with pvc pipe (5) Position is provided with the preformed hole that wire (12) passes through, external deformeter by wire (12) be connected to foil gauge I (6) and Foil gauge II (14).
- A kind of 2. prestressed anchor shear stress on interface measurement apparatus according to claim 1, it is characterised in that：Described should Become piece II (14) as three-dimensional foil gauge, therein two are mutually perpendicular to foil gauge, another to be located to foil gauge on angular bisector, often External deformeter is connected to by wire (12) to foil gauge.
- A kind of 3. prestressed anchor shear stress on interface measurement apparatus according to claim 1 or 2, it is characterised in that：It is described Strain brick (11) be respectively arranged at every fine steel rib (7) stage casing and fine steel rib (7) close to country rock (3) one end.
- A kind of 4. prestressed anchor shear stress on interface measurement apparatus according to claim 1 or 2, it is characterised in that：It is described The body of rod (10) side in the horizontal direction and bottom is vertically respectively arranged with Parabolic to medium-height trestle (8), and prop up Two bottoms of frame are connected to the body of rod (10).
- A kind of 5. prestressed anchor shear stress on interface measurement apparatus according to claim 1 or 2, it is characterised in that：It is described Pvc pipe ring (4) be fixedly connected by screw and fixing bolt (13) with pvc pipe (5).
- 6. the test method of prestressed anchor shear stress on interface measurement apparatus according to claim 4, it is characterised in that tool Body includes following test procedure：S1, Rock And Soil drilling；S2, according to test requirements document, the body of rod (10) both sides foil gauge I (6) is pasted respectively, foil gauge I (6) is pasted quantity and distribution Position meets the requirements, and carries out water-proofing treatment to foil gauge I (6)；S3, pvc pipe ring (4) is set according to stickup quantity and the distributing position connection of foil gauge I (6) on the outside of pvc pipe (5), made The position that foil gauge I (6) is each pasted with the body of rod (10) is corresponding with pvc pipe ring (4)；S4, the body of rod (10) is nested in pvc pipe ring (4)；S5, fine steel rib (7) are hinged through rectangle hole slot (15) with the body of rod (10) both sides, and fine steel rib (7) is tightening state, thin Installation is pasted with the strain brick (11) of foil gauge II (14) on reinforcing bar (7), and carries out water-proofing treatment to foil gauge II (14)；S6, wire (12) along pvc pipe (5) lay, and external deformeter by wire (12) be connected to foil gauge I (6) and Foil gauge II (14)；S7, medium-height trestle (8) will be respectively welded in the body of rod (10) side and bottom, and two bottoms of support is propped up the body of rod, top Withstand country rock in end；S8, it will be pasted with the body of rod (10) grouted part (1) feeding country rock (3) drilling (9) of foil gauge I (6)；S9, fixing PVC pipe (5), while to the outer tensioning body of rod (10) of country rock (3), under the cooperation of rectangle hole slot (15), by thin steel Muscle (7) is gradually spread out, and angle becomes larger between fine steel rib (7) and the body of rod (10), and it is in divergent state to make fine steel rib (7), and is made The foil gauge II (14) strained on brick (11) reaches precalculated position；S10, cement injection；S11, by deformeter gather strain data, so as to obtain shear stress on interface value.
- 7. test method according to claim 6, it is characterised in that：In described S5, strain brick (11) is installed on thin steel The stage casing of muscle (7) and fine steel rib (7) are close to one end of country rock (3).
- 8. test method according to claim 6, it is characterised in that：In described S5, brick (11) side is strained along longitudinal direction Dig and take semi-cylindrical recesses, spreading glue in groove, be attached to fine steel rib (7) cementing with strain brick (11) in groove；24 hours Afterwards in strain brick (11) surface smear waterproof material.
- 9. test method according to claim 6, it is characterised in that：In described S3, pvc pipe ring (4) passes through fixed spiral shell Bolt (13) is fixedly connected with pvc pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710908216.1A CN107560950B (en) | 2017-09-29 | 2017-09-29 | Device for measuring shear stress of interface of prestressed anchor rod and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710908216.1A CN107560950B (en) | 2017-09-29 | 2017-09-29 | Device for measuring shear stress of interface of prestressed anchor rod and test method thereof |
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| Publication Number | Publication Date |
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| CN107560950A true CN107560950A (en) | 2018-01-09 |
| CN107560950B CN107560950B (en) | 2024-05-07 |
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Cited By (3)
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| CN109632158A (en) * | 2018-12-19 | 2019-04-16 | 天地科技股份有限公司 | Model test stress test block and its preparation and application |
| CN110470549A (en) * | 2019-07-25 | 2019-11-19 | 绍兴文理学院 | Anchor structure face shearing strength dimensional effect pilot system |
| CN110631934A (en) * | 2019-09-27 | 2019-12-31 | 郑州新泰精密量仪有限公司 | Waveform gasket fatigue testing machine and testing method thereof |
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| CN110470549A (en) * | 2019-07-25 | 2019-11-19 | 绍兴文理学院 | Anchor structure face shearing strength dimensional effect pilot system |
| CN110470549B (en) * | 2019-07-25 | 2021-10-22 | 宁波大学 | System for testing shear strength size effect of anchoring structure surface |
| CN110631934A (en) * | 2019-09-27 | 2019-12-31 | 郑州新泰精密量仪有限公司 | Waveform gasket fatigue testing machine and testing method thereof |
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| Publication number | Publication date |
|---|---|
| CN107560950B (en) | 2024-05-07 |
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