CN110514585A - A kind of gunite concrete and country rock adhesion strength measurement device - Google Patents
A kind of gunite concrete and country rock adhesion strength measurement device Download PDFInfo
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- CN110514585A CN110514585A CN201910850437.7A CN201910850437A CN110514585A CN 110514585 A CN110514585 A CN 110514585A CN 201910850437 A CN201910850437 A CN 201910850437A CN 110514585 A CN110514585 A CN 110514585A
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- snap ring
- country rock
- side plate
- adhesion strength
- measurement device
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- 239000004567 concrete Substances 0.000 title claims abstract description 54
- 239000011435 rock Substances 0.000 title claims abstract description 49
- 239000011378 shotcrete Substances 0.000 title claims abstract description 42
- 238000005259 measurement Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 58
- 238000001514 detection method Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000000956 alloy Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 8
- 238000010276 construction Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 208000028804 PERCHING syndrome Diseases 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000007586 pull-out test Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of gunite concretes and country rock adhesion strength measurement device, including snap ring, support frame, force transmitting board and chest expander；The snap ring is connected to force transmitting board by pull rod, and the force transmitting board is connected to chest expander by transmission rod, and the chest expander is placed on support frame as described above；The snap ring is spliced by two semi arch plates, and stress side plate, the stress side plate connecting rod are fixed with around snap ring；Support frame as described above is inverse u shape, is provided with the first circular hole for passing through transmission rod at its center, is fixed with side plate in bottom end, and the second circular hole for support frame to be fixed on to spray concrete is provided on the side plate.The present invention realizes testing position random selection, detects to fast accurate gunite concrete and country rock adhesion strength data, is conducive to improve detection efficiency.
Description
Technical field
The present invention relates to testing concrete performance field, especially a kind of gunite concrete and the measurement of country rock adhesion strength are filled
It sets.
Background technique
Gunite concrete refers to using compressed air or other power, will press the concrete mixture of certain match ratio mixing
Along Pipeline transport to nozzle, injection is in by spray plane, relying on the continuous shock of cement and aggregate in course of injection, be compacted and formed
A kind of concrete.After gunite concrete and country rock adhesion strength refer to that concrete to be sprayed reaches design age, drawbench is used
Pulling force is applied to pull rod, is slowly reinforced with the speed of 20N-40N per second until test specimen is broken.Take the broken of test specimen and country rock faying face
Bad intensity is gunite concrete and country rock adhesion strength.
Measurement gunite concrete and country rock adhesion strength mainly pass through drawbench and apply pulling force to pull rod, make test specimen along spray
It penetrates concrete and country rock faying face destroys, gunite concrete and country rock adhesion strength are calculated according to tensile stress and damage area.Such as
It is to influence a key factor of gunite concrete and country rock adhesion strength that, which applies tensile stress to gunite concrete, so " rock
Soil anchor bolt and concrete spraying support engineering legislation " (GB50086-2015) measurement gunite concrete and country rock are bonded it is strong
Degree test be made that regulation, the test method in specification there are two types of primary scene using to drilled septum cordis from the concrete time into
Row pull-out test is completed, second of core sample progress pull test completion used in laboratory to drilling through.It sprays on the market at present
Concrete and country rock adhesion strength measurement device generally use pre-buried Materials with High Strength pull rod when construction of shotcrete, spray coagulation
Only retain test specimen bottom surface in conjunction with country rock along the slot that test specimen contour line accomplishes width about 50mm with perching knife after soil construction, reaches age
20mm is proceeded to using the small-sized core drilling machine vertical gunite concrete of diamond bit and country rock level afterwards to be formed with injection coagulation
The cylindrical core of soil；Slowly apply stress with support device and anchor rod drawing instrument cooperation, destroy core along country rock faying face,
(on-site cutting to complete to test) off-test intermediate span is begun preparing and be tested to from (pre-buried pull rod) and reaches 28d, is examined in this way
Time-consuming for survey process.
Unbearable hubbing is current injection coagulation and country rock adhesion strength measuring method with widest method, the method
It is used in each class surrounding rock, pulling force is applied to pull rod by drawbench, destroys test specimen along gunite concrete and country rock faying face, root
Gunite concrete and country rock adhesion strength are calculated according to tensile stress and damage area.
With the continuous propulsion of China's reform and opening-up cause, China's foundation construction field will welcome new development, spray
Concrete is widely used to the every field such as traffic engineering, railway engineering, hydraulic engineering, hydroelectric project, gunite concrete with
It is preceding mixed in injection to infiltrate hubbing test as an important process for guaranteeing construction of shotcrete quality for country rock adhesion strength
When solidifying soil construction after the pre-buried Materials with High Strength pull rod in test specimen center, accomplish the slot of width about 50mm along test specimen contour line with perching knife immediately
Only retain test specimen bottom surface to test after 28 day age in conjunction with country rock, reserved Materials with High Strength pull rod leads to the first pre-buried test specimen center
Materials with High Strength pull rod verticality is difficult to ensure, directly affect core sample whether uniform stressed cause when test to gunite concrete with enclose
Rock adhesion strength accuracy, which has an impact, has an adverse effect to engineering；There is also tests before period long test for this test method
After be both needed to manually to carry out that various operations are time-consuming and laborious, and being determined in advance there is also testing position causes test result not have band table
The shortcomings that.
Gunite concrete used and country rock adhesion strength measurement device are by support device and anchor rod drawing currently on the market
Instrument composition, before test in construction of shotcrete after the pre-buried Materials with High Strength pull rod in test specimen center, immediately with perching knife along test specimen
The slot that contour line accomplishes width about 50mm only retains test specimen bottom surface in conjunction with country rock, tests after 28 day age, using small when test
The type core drilling machine vertical gunite concrete of diamond bit and country rock level proceed to 20mm and form the cylinder for having gunite concrete
Shape core；Slowly apply stress with support device and anchor rod drawing instrument cooperation, destroys core along country rock faying face, this test
Cause the artificial property of testing result to be affected and does not have representativeness.
Generally speaking, current measurement method has the following deficiencies: 1) it is difficult to bury test specimen center Materials with High Strength pull rod verticality
To guarantee, directly affecting core sample, whether uniform stressed causes to generate gunite concrete and country rock adhesion strength accuracy when test
Influence has an adverse effect to engineering.2) it is both needed to manually carry out various operations after test before testing there are period length, it is time-consuming and laborious.
3) being determined in advance there are testing position causes test result not have the shortcomings that band table.4) pre-buried high-strength material need to largely be reserved
It is serious that material pull rod causes experimentation cost to increase, and causes waste of material.5) under the influence of not considering to think factor, testing result is not
It is representative, it causes testing result not have reference value and immeasurable influence is caused safely on construction personnel in tunnel.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of gunite concretes and country rock adhesion strength measurement device, real
Existing testing position random selection detects to fast accurate gunite concrete and country rock adhesion strength data, is conducive to improve detection
Efficiency economizes on resources, is easy to use, speed is fast, high-efficient, strong applicability.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of gunite concrete and country rock bonding are strong
Spend measurement device, including snap ring, support frame, force transmitting board and chest expander；The snap ring is connected to force transmitting board, the biography by pull rod
Power plate is connected to chest expander by transmission rod, and the chest expander is placed on support frame as described above；
The snap ring is spliced by two semi arch plates, and stress side plate is fixed with around snap ring, and the stress side plate connection is drawn
Bar；Support frame as described above is inverse u shape, is provided with the first circular hole for passing through transmission rod at its center, is fixed with side in bottom end
Plate is provided with the second circular hole for support frame to be fixed on to spray concrete on the side plate.
Further, the stress side plate on the snap ring has 3, is provided with third circular hole on each stress side plate；In
It is provided with the 5th circular hole for passing through transmission rod at force transmitting board center, 3 the 4th circular holes are also provided on force transmitting board, each the
Connecting rod between four circular holes and corresponding third circular hole.
Further, the stress side sheet room on the snap ring is evenly distributed on snap ring every 120 °.
Further, the chest expander uses the digital display anchor rod drawing instrument of maximum range 100KN, precision 0.01KN.
Further, two semi arch plates of the snap ring are fixed using connection bolt.
Further, locking anchorage is additionally provided on the transmission rod, the locking anchorage is for consolidating chest expander.
Compared with prior art, the beneficial effects of the present invention are:
1) measurement device does not need pre-buried pull rod, economizes on resources than conventional method, saves manpower；
2) quickly, testing result can quickly be tested out by reaching for measurement device installation, be conducive to promote detection efficiency；
Although 3) measurement device structure is simple, rationally, simple installation, testing crew will not generate in the detection process for design
Security risk；
4) because not needing the pre-buried pull rod before construction, the work of testing crew is needed to reduce, speed is fast, saves human and material resources into
This, has accomplished energy conservation and environmental protection；
5) measurement device material therefor can repeat to dismount, and reuse, and can assemble at any time and detect and dismount transfer at any time；
6) low cost, pull rod low cost more pre-buried than conventional method, and may be reused；
7) measurement device use scope is wide, can be in any field laboratory's on-site test gunite concrete and country rock adhesion strength
It uses, can repeat to dismount, utilization efficiency is high.
Detailed description of the invention
Fig. 1 is a kind of gunite concrete of the present invention and country rock adhesion strength measurement device overall structure diagram.
Fig. 2 is support frame structure diagram in the present invention.
Fig. 3 is Snap ring structure schematic diagram in the present invention.
Fig. 4 is force transmitting board structural schematic diagram in the present invention.
In figure: transmission rod 1；Lock anchorage 2；Chest expander 3；Support frame 4；Expansion bolt 5；Spray concrete 6；Pull rod 7；Snap ring 8；It passes
Power plate 9；Side plate 10；First circular hole 11；Second circular hole 12；Third circular hole 13；Semi arch plate 14；Stress side plate 15；Connect bolt
16；4th circular hole 17；5th circular hole 18.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Apparatus of the present invention consist of the following parts: support frame 4(inverse u shape, and there is the first circular hole 11 of 30mm in centre), snap ring 8
(two semi arch plates 14 form), force transmitting board 9, pull rod 7 and the manual anchor rod drawing instrument of chest expander 3(digital display type 100kN, reading essence
Really arrive 0.01kN).
Specifically, support frame 4 is made of high-strength alloy plate, the high 500mm of two legs, the width 100mm, plate thickness of inverse u shape leg
20mm, two legs and concrete surface contact position (on the outside of test specimen) horizontal direction respectively welds one piece of long 50mm, 100mm, plate thickness 20mm
Wide steel plate (i.e. side plate 10) bores the second circular hole 12 of 10mm for expansion bolt 5 away from every 10 side 25mm of side plate in 10 center line of side plate
Fixing support rack 4；It is drilled with the first circular hole 11 of diameter 30mm in the middle part of support frame 4, is passed through for the transmission rod 1 of chest expander 3.Support
Frame semi-finals degree rigidity meets detection needs, can guarantee the stabilization of detection device during entirely testing, until detection is completed, and
Stability meets personnel during the test, does not generate security risk.
Snap ring 8 is made of high-strength alloy plate, specifically uses two internal diameters for the semicircle of 200mm, high 80mm, plate thickness 10mm
Arc plate 14 forms；14 edge of semi arch plate outward respectively weld one piece of long 40mm, width 80mm, plate thickness 10mm high strength steel plate (i.e. by
Power side plate 15), alongst the center line of 20mm is in the hole for respectively drilling through a diameter 10mm at lower edges 20mm,
This hole is for connecting 16 fixing clasp 8 of bolt；Stress side plate of the snap ring 8 every 120 ° of horizontal welding, one piece of long 40mm, width 40mm
15,15 central point of stress side plate drills through the third circular hole 13 of 10mm diameter, passes through for pull rod 7.The design of high-strength alloy snap ring 8 is closed
Reason is connected using two semi arch plates 14, is saved market and is generallyd use waste of material caused by pre-buried pull rod, using 120 ° three
Point loading guarantees core sample uniform stressed, guarantees that detection data is accurate.
Force-transmitting part is made of the pull rod 7 and high-strength alloy force transmitting board 9 of high-strength steel, and pull rod 7 uses diameter 20mm, length
The high-strength alloy of 600mm, 7 end of pull rod use numerically-controlled machine tool Pick Wire 100mm；Force transmitting board 9 uses diameter 300mm, thickness 20mm
High-strength alloy plate, the center point use numerically-controlled machine tool processing diameter for the 5th circular hole 18 of 20mm, apart from center of circle 110mm, every
The 4th circular hole 17 of 120 ° of drill straight diameter 10mm is used for high-strength alloy snap ring 8 and pull rod 7；Transmission rod 1 uses diameter 10mm, length
300mm is spent, two ends respectively use numerically-controlled machine tool Pick Wire 50mm, and every end matches and matches 2, screw.
Chest expander 3 uses the digital display anchor rod drawing instrument of technology maturation in the market, such as reaches instrument manufacturing factory system by upper sea route
The ML-100KN type digital display anchor rod drawing instrument made, maximum range 100KN precision 0.01KN.
Measurement device of the present invention uses the wide strip processing procedure of high-strength alloy thick steel plate, and stable structure can be observed convenient for observation
The variation with country rock adhesive surface of entire test process gunite concrete core.Measurement device of the present invention and country rock expansion bolt
5 are connected firmly, and are not subjected to displacement in the detection process, and measurement device and test core sample height are suitable, and testing staff is facilitated to operate
Entire test.Overall dimensions 600*600*300mm after the completion of whole device can accomplish that disassembly vanning, inspection next time are completed in detection
Survey assembles again, accomplishes to reuse.
After measurement device of the present invention is completed, You Yiming ancillary test personnel are distinguished core using concrete core drilling machine
It is viscous using the diamond bit support diameter 200 of internal diameter 200mm and 400mm, the gunite concrete for going deep into country rock 20mm and country rock
Knotting strength tests core sample, and You Yiming testing crew installs measurement device under the cooperation of ancillary test personnel, starts to test, and measures
Core diameter 200mm, for manual pressure until gunite concrete and country rock adhesive surface destroy, anchor rod drawing instrument shows ultimate tension
34.56KN is bonded by calculating sample gunite concrete and country rock adhesion strength=ultimate tension/gunite concrete and country rock bonding
Face area, the gunite concrete and country rock adhesion strength are 1.1MPa, and entire test in process about 50min is completed.Illustrate to survey
Determining device can accomplish to reduce detection time, reduce testing staff's investment, it is representative to improve detection.
Claims (6)
1. a kind of gunite concrete and country rock adhesion strength measurement device, which is characterized in that including snap ring (8), support frame (4),
Force transmitting board (9) and chest expander (3)；The snap ring (8) is connected to force transmitting board (9) by pull rod (7), and the force transmitting board (9) passes through
Transmission rod (1) is connected to chest expander (3), and the chest expander (3) is placed on support frame as described above (4)；
The snap ring (8) is spliced by two semi arch plates (14), is fixed with stress side plate (15) around snap ring (8), described
Stress side plate (15) connecting rod (7)；Support frame as described above (4) is inverse u shape, is provided at its center for across transmission rod
(1) the first circular hole (11) is fixed with side plate (10) in bottom end, is provided on the side plate (10) for support frame (4) are fixed
In the second circular hole (12) of spray concrete (6).
2. a kind of gunite concrete according to claim 1 and country rock adhesion strength measurement device, which is characterized in that described
Stress side plate (15) on snap ring (8) has 3, is provided with third circular hole (13) on each stress side plate (15)；In force transmitting board
(9) it is provided at center for the 5th circular hole (18) across transmission rod (1), 3 the 4th circular holes is also provided on force transmitting board (9)
(17), connecting rod (7) between each the 4th circular hole (17) and corresponding third circular hole (13).
3. a kind of gunite concrete according to claim 2 and country rock adhesion strength measurement device, which is characterized in that described
Stress side plate (15) on snap ring (8) is spaced 120 °, is evenly distributed on snap ring (8).
4. a kind of gunite concrete according to claim 1 and country rock adhesion strength measurement device, which is characterized in that described
Chest expander (3) uses the digital display anchor rod drawing instrument of maximum range 100KN, precision 0.01KN.
5. a kind of gunite concrete according to claim 1 and country rock adhesion strength measurement device, which is characterized in that described
Two semi arch plates (14) of snap ring (8) are fixed using connection bolt (16).
6. a kind of gunite concrete according to claim 1 and country rock adhesion strength measurement device, which is characterized in that in institute
It states and is additionally provided with locking anchorage (2) on transmission rod (1), the locking anchorage (2) is for consolidating chest expander (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910850437.7A CN110514585A (en) | 2019-09-10 | 2019-09-10 | A kind of gunite concrete and country rock adhesion strength measurement device |
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| CN201910850437.7A CN110514585A (en) | 2019-09-10 | 2019-09-10 | A kind of gunite concrete and country rock adhesion strength measurement device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948040A (en) * | 2020-07-07 | 2020-11-17 | 浙江求是工程检测有限公司 | Concrete strength detection method for cast-in-situ concrete floor slab |
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