CN104865182B - Measure the drawing experimental provision and its computational methods of concrete and country rock adhesive strength - Google Patents
Measure the drawing experimental provision and its computational methods of concrete and country rock adhesive strength Download PDFInfo
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- CN104865182B CN104865182B CN201510019602.6A CN201510019602A CN104865182B CN 104865182 B CN104865182 B CN 104865182B CN 201510019602 A CN201510019602 A CN 201510019602A CN 104865182 B CN104865182 B CN 104865182B
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- country rock
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Patent of the present invention discloses the drawing experimental provision and its computational methods for measuring concrete and country rock adhesive strength, and structure includes head cover, and the top cap central is provided with the screw hole of perforation, and the head cover lower circumference is provided with the arc-shaped internal projection of three pieces；There are three arc-shaped anchors, each arc-shaped anchors top to be both provided with a piece of arc-shaped outer lug for setting below the head cover；Three arc-shaped anchors can be wrapped in interior upper coarse and lower fine hollow cylindrical sleeve by being provided on the outside of three arc-shaped anchors, be fixed with screw rod at the top of the cylindrical sleeve, nut is provided on the screw rod at the top of the head cover.This patent has the advantages that easy to use, installation operation is simple, and can effectively protect staff is from high temperature injury.
Description
Technical field
The present invention relates to a kind of pull-out test devices, especially a kind of simple and reliable for structure, easy to assembly, highly practical
Measure the drawing experimental provision and its computational methods of concrete and country rock adhesive strength.
Background technology
Qi Reha tal fibre hydraulic engineerings positioned at Xinjiang of China Kaxgar Prefecture, find serious in headrace tunnel excavation
High-geotemperature phenomenon, tunnel reach as high as 120 DEG C through rear palisades temperature, and design scheme is needed in gunite concrete as country rock
Supporting, but the adhesive strength of gunite concrete and country rock hardly results in guarantee under high temperature environment, so one kind is needed to be used for
The drawing experimental provision for measuring gunite concrete and country rock adhesive strength, for detection on-spot injection concrete and country rock in time
Adhesive strength, to ensure the safe operation of hydraulic engineering.
There are three ways to currently used for detection gunite concrete with country rock adhesive strength, i.e., reserved test specimen hubbing shows
Field drill core hubbing and split the law in the big plate room of spray.According to water conservancy specification《Hydraulic and hydroelectric engineering spurt anchorage net specification》
(SL377-2007) the adhesive strength detection method of the gunite concrete and country rock faying face that are provided can use reserved test specimen
Hubbing and drill core hubbing.But in the diversion tunnel there are High-geotemperature, by being needed in its design requirement concrete mix
A certain amount of accelerator is mixed, therefore gunite concrete can reach some strength within the spray mixed very short time terminated, in advance
There are great difficulties for the embedment of embedded part, therefore reserved test specimen hubbing is difficult in such field conduct.Usually used drill core
Hubbing is usually first to drill through the circular hole of certain depth in core center, is consolidated using epoxy curing agent implantation reinforcing bar
Change, carry out drawing using anchor rod drawing instrument later, still, solidification under normal conditions needs longer period of time, seriously affects spray
The measurement progress of concrete and country rock adhesive strength is penetrated, and since gunite concrete temperature is very high, it is difficult to find suitable solid
Agent.
By inquiring existing related gunite concrete and country rock adhesive strength measurement experiment apparatus and method, existing paper
With patent for there are the tunnels of High-geotemperature phenomenon to apply with certain difficulty, it is therefore desirable to which a kind of experimental provision can be with
It is suitble to measure the experimental provision of gunite concrete and country rock adhesive strength with High-geotemperature phenomenon.
Invention content
To solve the above problems, the present invention provides the drawing experimental provision for measuring concrete and country rock adhesive strength and its
Computational methods, including head cover, the top cap central are provided with the screw hole of perforation, and the head cover lower circumference is provided with three pieces circle
Arc internal projection；
There are three arc-shaped anchors, each arc-shaped anchors top to be both provided with a piece of circle for setting below the head cover
Arc outer lug；
It is provided on the outside of three arc-shaped anchors upper coarse and lower fine in being wrapped in three arc-shaped anchors
Hollow cylindrical sleeve, the cylindrical sleeve top are fixed with screw rod, nut are provided on the screw rod at the top of the head cover；
Pass through the arc-shaped internal projection being arranged thereon and arc-shaped outer lug between the head cover and arc-shaped anchors respectively
Rotation is connected together after socket.
The drawing experimental provision and its computational methods of measurement concrete and country rock adhesive strength described in this patent, use
When, it then follows following steps：
1) to needing the gunite concrete for carrying out drawing experiment to carry out drill core, it is drilled into rock interior about 20mm, forms band
There is the cylindrical core of gunite concrete；
2) cylindrical sleeve with screw rod is put among the gap of concrete cylindrical core sample and outer wall, three circular arcs
Shape anchors is inserted between cylindrical sleeve and concrete cylindrical core sample；
3) screw hole of top cap central is passed through into screw rod, and will be at the top of three arc-shaped internal projections and three arc-shaped anchors
The socket of arc-shaped outer lug after screw, by head cover and cylindrical sleeve also respectively by the arc-shaped internal projection that is arranged thereon
Engaging is rotated after the groove of side and the socket of arc-shaped internal projection；
4) nut is screwed down along screw rod, squeezing head cover makes head cover apply uniformly downward power to arc-shaped anchors, will mix
Solidifying soil cylindrical core is held tightly；
5) it is connected with screw rod using existing anchor rod drawing instrument in the market, carries out drawing experiment, gunite concrete and country rock
When being broken, the value of thrust when greatest measure shown on anchor rod drawing instrument is gunite concrete fracture, to speculate spray
Penetrate the cementing value of concrete and country rock.
It calculates gunite concrete and the formula of country rock adhesive strength is：
In formula：Rc--- the adhesive strength of gunite concrete and country rock, MPa；
Pc--- core breaks load, N；
Ac--- core breaks sectional area, mm2；
α --- the core plane of disruption is the same as transversal interfacial angle.
This patent has the following advantages that：
(1) this patent is easy to operate, may be implemented, by the quick stuck function of core, to be suitable for measuring each inside tunnel
The gunite concrete at position and the adhesive strength of country rock；
(2) after to gunite concrete core-drilling, conventional method is compared, without being implanted into reinforcing bar, directly uses this dress
Setting and combining anchor rod drawing instrument that can carry out adhesive strength measurement reduces survey crew to which time of measuring be greatly saved
Activity duration in the high temperature environment protects the health of survey crew to a certain extent.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is head cover and anchors overlook direction connection relationship diagram.
Specific implementation mode
This patent is described further with reference to embodiment：
As shown in Figure 1, measuring the drawing experimental provision and its computational methods of concrete and country rock adhesive strength, including head cover
3, the head cover 3 is provided centrally with the screw hole of perforation, and the head cover lower circumference is provided with the arc-shaped internal projection of three pieces；
There are three arc-shaped anchors 4,4 tops of each arc-shaped anchors to be both provided with one for 3 lower section setting of the head cover
The arc-shaped outer lug of piece；
The outside of three arc-shaped anchors 4 be provided with three arc-shaped anchors can be wrapped in it is upper coarse and lower fine
Hollow cylindrical sleeve 5,5 top of the cylindrical sleeve are fixed with screw rod 1, are provided on the screw rod 1 at 3 top of the head cover
Nut 2；
Pass through the arc-shaped internal projection being arranged thereon and arc-shaped evagination between the head cover 3 and arc-shaped anchors 4 respectively
It rises to rotate after being socketed and be connected together.
It calculates gunite concrete and the formula of country rock adhesive strength is：
In formula：Rc--- the adhesive strength of gunite concrete and country rock, MPa；
Pc--- core breaks load, N；
Ac--- core breaks sectional area, mm2；
α --- the core plane of disruption is the same as transversal interfacial angle.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the guarantor of the present invention
Shield range is defined, and without departing from the spirit of the design of the present invention, this field ordinary engineering and technical personnel is to skill of the present invention
The various modifications and improvement that art scheme is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (3)
1. measuring the drawing experimental provision of concrete and country rock adhesive strength, which is characterized in that including head cover, the top cap central
It is provided with the screw hole of perforation, the head cover lower circumference is provided with the arc-shaped internal projection of three pieces；It is provided with below the head cover
Three arc-shaped anchors, each arc-shaped anchors top are both provided with a piece of arc-shaped outer lug；Described three arc-shaped
Three arc-shaped anchors can be wrapped in interior upper coarse and lower fine hollow cylindrical sleeve, the circle by being provided on the outside of anchors
It is provided with the arc-shaped internal projection of three pieces at the top of cylindrical sleeve, screw rod, the head cover top are fixed at the top of the cylindrical sleeve
Screw rod on be provided with nut；Arc-shaped internal projection and circle by being arranged thereon respectively between the head cover and arc-shaped anchors
It rotates and is connected together after the socket of arc outer lug；It is arc-shaped by what is be arranged thereon respectively between the head cover and cylindrical sleeve
It rotates and is connected together after groove and the socket of arc-shaped internal projection above internal projection.
2. the application method according to claim 1 for measuring concrete and the drawing experimental provision of country rock adhesive strength, is abided by
Follow following steps：
1）To needing the gunite concrete for carrying out drawing experiment to carry out drill core, it is drilled into rock interior about 20mm, is formed with spray
Penetrate the cylindrical core of concrete；
2）Cylindrical sleeve with screw rod is put among the gap of concrete cylindrical core sample and outer wall, three arc-shaped anchors
Piece is inserted between cylindrical sleeve and concrete cylindrical core sample；
3）The screw hole of top cap central is passed through into screw rod, and by three arc-shaped internal projections and the circle at the top of three arc-shaped anchors
It is screwed after the socket of arc outer lug, by head cover and cylindrical sleeve also respectively by above the arc-shaped internal projection that is arranged thereon
Engaging is rotated after groove and the socket of arc-shaped internal projection；
4）Nut is screwed down along screw rod, squeezing head cover makes head cover apply uniformly downward power to arc-shaped anchors, by concrete
Cylindrical core is held tightly；
5）It is connected with screw rod using existing anchor rod drawing instrument in the market, carries out drawing experiment, gunite concrete occurs with country rock
When fracture, the value of thrust when greatest measure shown on anchor rod drawing instrument is gunite concrete fracture, to speculate that injection is mixed
The cementing value of solidifying soil and country rock.
3. the computational methods according to claim 1 for measuring concrete and the drawing experimental provision of country rock adhesive strength,
It is characterized in that, calculates gunite concrete and the formula of country rock adhesive strength is：
In formula：Rc--- the adhesive strength of gunite concrete and country rock, MPa；
Pc--- core breaks load, N；
Ac--- core breaks sectional area, mm2；
α --- the core plane of disruption is the same as transversal interfacial angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019602.6A CN104865182B (en) | 2015-01-15 | 2015-01-15 | Measure the drawing experimental provision and its computational methods of concrete and country rock adhesive strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019602.6A CN104865182B (en) | 2015-01-15 | 2015-01-15 | Measure the drawing experimental provision and its computational methods of concrete and country rock adhesive strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104865182A CN104865182A (en) | 2015-08-26 |
| CN104865182B true CN104865182B (en) | 2018-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510019602.6A Expired - Fee Related CN104865182B (en) | 2015-01-15 | 2015-01-15 | Measure the drawing experimental provision and its computational methods of concrete and country rock adhesive strength |
Country Status (1)
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514585B (en) * | 2019-09-10 | 2024-07-23 | 中国水利水电第五工程局有限公司 | Sprayed concrete and surrounding rock bonding strength measuring device |
| CN113252552B (en) * | 2021-04-13 | 2022-11-08 | 中铁十二局集团有限公司 | Test method for detecting bonding strength between sprayed concrete and surrounding rock |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD205206A1 (en) * | 1981-12-18 | 1983-12-21 | Helmut Dahl | TRAGOESE FOR INSTALLATION IN CONCRETE OR ROCK |
| CN1249422C (en) * | 2004-06-01 | 2006-04-05 | 中国科学院上海光学精密机械研究所 | Device for measuring film adhesion by peeling method |
| CN102608025B (en) * | 2012-03-06 | 2014-07-16 | 长安大学 | Pavement interlayer bonding strength detector |
| CN202614661U (en) * | 2012-06-11 | 2012-12-19 | 西南交通大学 | Improved device for determining bonding strength of sprayed concrete and rocks |
| CN204346888U (en) * | 2015-01-15 | 2015-05-20 | 河北工程大学 | Measure the drawing experimental provision of concrete and country rock bonding strength |
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- 2015-01-15 CN CN201510019602.6A patent/CN104865182B/en not_active Expired - Fee Related
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| CN104865182A (en) | 2015-08-26 |
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