CN104865182A - Drawing experiment apparatus for measuring bonding strength of concrete to surrounding rocks, and calculating method thereof - Google Patents
Drawing experiment apparatus for measuring bonding strength of concrete to surrounding rocks, and calculating method thereof Download PDFInfo
- Publication number
- CN104865182A CN104865182A CN201510019602.6A CN201510019602A CN104865182A CN 104865182 A CN104865182 A CN 104865182A CN 201510019602 A CN201510019602 A CN 201510019602A CN 104865182 A CN104865182 A CN 104865182A
- Authority
- CN
- China
- Prior art keywords
- circular arc
- bonding strength
- top cover
- concrete
- anchors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a drawing experiment apparatus for measuring the bonding strength of concrete to surrounding rocks, and a calculating method thereof. The structure of the apparatus comprises a top cover, the center of the top cover is provided with a through screw hole, and the circumference of the lower portion of the top cover is provided with three arc-shaped inner protuberances; three arc-shaped anchor sheets are arranged below the top cover, and the top of each of the arc-shaped anchor sheets is provided with an arc-shaped outer protuberance; and the outer side of the three arc-shaped anchor sheets is provided with a hollow cylindrical sleeve having larger top and smaller bottom and used for wrapping the three arc-shaped anchor sheets, the top of the cylindrical sleeve is fixedly provided with a screw, and the screw at the top of the top cover is provided with a nut. The apparatus has the advantages of use convenience, simple installation and operation, and effective protection of workers from high temperature damages.
Description
Technical field
The present invention relates to a kind of pull-out test device, the drawing experimental provision of especially a kind of simple and reliable for structure, easy to assembly, practical measurement concrete and country rock bonding strength and computing method thereof.
Background technology
Be positioned at the Qi Reha tal fibre hydraulic engineering of Xinjiang of China Kaxgar Prefecture, serious High-geotemperature phenomenon is found when headrace tunnel excavation, tunnel runs through rear crag temperature and reaches as high as 120 DEG C, its design proposal needs at sprayed concrete as surrounding rock supporting, but the bonding strength of sprayed concrete and country rock is difficult to be guaranteed in high temperature environments, so need a kind of drawing experimental provision for measuring sprayed concrete and country rock bonding strength, for the bonding strength of timely Test Field sprayed concrete and country rock, thus ensure the safe operation of hydraulic engineering.
Three kinds are had at present, i.e. reserved test specimen hubbing, on-the-spot brill core hubbing split the law indoor with the large plate of spray for the method detecting sprayed concrete and country rock bonding strength.According to the bonding strength detection method of water conservancy specification " the Hydraulic and Hydro-Power Engineering spurt anchorage net specification " sprayed concrete that (SL377-2007) provides and country rock faying face, reserved test specimen hubbing can be used and bore core hubbing.But in the diversion tunnel that there is High-geotemperature, need to mix a certain amount of accelerating chemicals by its designing requirement concrete mix, therefore within the spray mixed very short time terminated, sprayed concrete just can reach some strength, there is great difficulty in imbedding of built-in fitting, therefore reserved test specimen hubbing is difficult at such field conduct.Normally used brill core hubbing is generally the circular hole first drilling through certain depth in core central authorities, utilize epoxy curing agent to implant reinforcing bar to be cured, anchor rod drawing instrument is utilized to carry out drawing afterwards, but, solidification needs longer a period of time under normal circumstances, have a strong impact on the measurement progress of sprayed concrete and country rock bonding strength, and due to sprayed concrete temperature very high, be difficult to find suitable hardening agent.
By inquiring about existing relevant sprayed concrete and country rock bonding strength experiments of measuring apparatus and method, existing paper and patent should use for the tunnel that there is High-geotemperature phenomenon has certain difficulty, therefore needs a kind of experimental provision can be applicable to measuring the experimental provision of sprayed concrete and the country rock bonding strength with High-geotemperature phenomenon.
Summary of the invention
For solving the problem, the invention provides the drawing experimental provision and computing method thereof of measuring concrete and country rock bonding strength, comprise top cover, described top cap central is provided with through screw hole, and described top cover lower circumference is provided with three circular arc internal projection;
Be provided with three circular arc anchors below described top cover, described each circular arc anchors top is provided with a slice circular arc outer lug;
The arranged outside of described three circular arc anchors has the cylindrical sleeve that three circular arc anchors can be wrapped in interior upper coarse and lower fine hollow, and described cylindrical sleeve top is fixed with screw rod, and the screw rod at described top cover top is provided with nut;
Rotate after being socketed respectively by the circular arc internal projection that it is arranged and circular arc outer lug between described top cover and circular arc anchors and be connected together.
Measurement concrete described in this patent and the drawing experimental provision of country rock bonding strength and computing method thereof, during use, follow following steps:
1) to need to carry out drawing experiment sprayed concrete carry out brill core, be drilled into rock interior and be about 20mm, form the cylindrical core with sprayed concrete;
2), among the gap cylindrical sleeve with screw rod being put into concrete cylindrical core and outer wall, three circular arc anchors are inserted between cylindrical sleeves and concrete cylindrical core;
3) screw hole of top cap central is passed screw rod, and screw after the circular arc outer lug at three circular arc internal projection and three circular arc anchors tops is socketed, rotate after top cover is also socketed respectively by the groove above the circular arc internal projection that it is arranged and circular arc internal projection with cylindrical sleeve and engage;
4) twisted downwards along screw rod by nut, extruding top cover makes top cover apply evenly downward power to circular arc anchors, is held tightly by concrete cylindrical core;
5) existing anchor rod drawing instrument on market is used to be connected with screw rod, carry out drawing experiment, when sprayed concrete and country rock occur to rupture, the greatest measure that anchor rod drawing instrument shows is value of thrust during sprayed concrete fracture, thus infers the cementing value of sprayed concrete and country rock.
The formula calculating sprayed concrete and country rock bonding strength is:
In formula: R
c---the bonding strength of sprayed concrete and country rock, MPa;
P
c---core breaks load, N;
A
c---core breaks sectional area, mm
2;
α---core rupture surface is with the xsect angle of cut.
This patent tool has the following advantages:
(1) this patent is easy and simple to handle, can realize core function stuck fast, is applicable to measure the inner sprayed concrete at each position of tunnel and the bonding strength of country rock;
(2) after to sprayed concrete core-drilling; compare classic method; without the need to implanting reinforcing bar; direct this device of use also can carry out bonding strength measurement in conjunction with anchor rod drawing instrument; thus greatly saved Measuring Time; decrease the activity duration of survey crew in hot environment, protect the health of survey crew to a certain extent.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is that top cover and anchors overlook direction annexation schematic diagram.
Embodiment
Below in conjunction with embodiment, this patent is described further:
As shown in Figure 1, measure drawing experimental provision and the computing method thereof of concrete and country rock bonding strength, comprise top cover 3, described top cover 3 center is provided with through screw hole, and described top cover lower circumference is provided with three circular arc internal projection;
Be provided with three circular arc anchors 4 below described top cover 3, described each circular arc anchors 4 top is provided with a slice circular arc outer lug;
The arranged outside of described three circular arc anchors 4 has the cylindrical sleeve 5 that three circular arc anchors can be wrapped in interior upper coarse and lower fine hollow, and described cylindrical sleeve 5 top is fixed with screw rod 1, and the screw rod 1 at described top cover 3 top is provided with nut 2;
Rotate after being socketed respectively by the circular arc internal projection that it is arranged and circular arc outer lug between described top cover 3 and circular arc anchors 4 and be connected together.
The formula calculating sprayed concrete and country rock bonding strength is:
In formula: R
c---the bonding strength of sprayed concrete and country rock, MPa;
P
c---core breaks load, N;
A
c---core breaks sectional area, mm
2;
α---core rupture surface is with the xsect angle of cut.
Embodiment recited above is only be described the preferred embodiment of the present invention; not protection scope of the present invention is limited; do not departing under the present invention designs spiritual prerequisite; the various distortion that the common engineering technical personnel in this area make technical solution of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (3)
1. measure the drawing experimental provision of concrete and country rock bonding strength, it is characterized in that, comprise top cover, described top cap central is provided with through screw hole, and described top cover lower circumference is provided with three circular arc internal projection; Be provided with three circular arc anchors below described top cover, described each circular arc anchors top is provided with a slice circular arc outer lug; The arranged outside of described three circular arc anchors has the cylindrical sleeve that three circular arc anchors can be wrapped in interior upper coarse and lower fine hollow, and described cylindrical sleeve top is fixed with screw rod, and the screw rod at described top cover top is provided with nut.
2. the drawing experimental provision of measurement concrete according to claim 1 and country rock bonding strength and computing method thereof, it is characterized in that, rotate after being socketed respectively by the circular arc internal projection that it is arranged and circular arc outer lug between described top cover and circular arc anchors and be connected together.
3. measure drawing experimental provision and the computing method thereof of concrete and country rock bonding strength, it is characterized in that, the formula calculating sprayed concrete and country rock bonding strength is:
In formula: R
c---the bonding strength of sprayed concrete and country rock, MPa;
P
c---core breaks load, N;
A
c---core breaks sectional area, mm
2;
α---core rupture surface is with the xsect angle of cut.
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 true CN104865182A (en) | 2015-08-26 |
| CN104865182B CN104865182B (en) | 2018-09-04 |
Family
ID=53911165
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)
| Country | Link |
|---|---|
| CN (1) | CN104865182B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514585A (en) * | 2019-09-10 | 2019-11-29 | 中国水利水电第五工程局有限公司 | A kind of gunite concrete and country rock adhesion strength measurement device |
| CN113252552A (en) * | 2021-04-13 | 2021-08-13 | 中铁十二局集团有限公司 | Test method for detecting bonding strength between sprayed concrete and surrounding rock |
Citations (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 |
| CN1584548A (en) * | 2004-06-01 | 2005-02-23 | 中国科学院上海光学精密机械研究所 | Measuring apparatus for thin-membrane adhesive force by stripping method |
| CN102608025A (en) * | 2012-03-06 | 2012-07-25 | 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 |
-
2015
- 2015-01-15 CN CN201510019602.6A patent/CN104865182B/en not_active Expired - Fee Related
Patent Citations (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 |
| CN1584548A (en) * | 2004-06-01 | 2005-02-23 | 中国科学院上海光学精密机械研究所 | Measuring apparatus for thin-membrane adhesive force by stripping method |
| CN102608025A (en) * | 2012-03-06 | 2012-07-25 | 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514585A (en) * | 2019-09-10 | 2019-11-29 | 中国水利水电第五工程局有限公司 | A kind of gunite concrete and country rock adhesion strength measurement device |
| CN113252552A (en) * | 2021-04-13 | 2021-08-13 | 中铁十二局集团有限公司 | Test method for detecting bonding strength between sprayed concrete and surrounding rock |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104865182B (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105352884B (en) | Test the experimental method and component of concrete and coal, rock or concrete adhesion strength | |
| CN103615272A (en) | Hollow anchor rod with rebar framework and construction method of hollow anchor rod | |
| CN104865182A (en) | Drawing experiment apparatus for measuring bonding strength of concrete to surrounding rocks, and calculating method thereof | |
| CN109184739A (en) | A kind of in-situ rapid renovation and characterization processes for tunnel scene section of jurisdiction damage zone | |
| CN102926413A (en) | Embedded pipe for sampling pile tip of filling pile | |
| CN106644763A (en) | Method and device for testing interfacial mechanical characteristics of earthen site anchoring slurry-substrate | |
| CN104747216A (en) | Ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method | |
| CN204827501U (en) | High precision fiber optic grating cavity of excelling in dynamometry stock | |
| CN204346888U (en) | Measure the drawing experimental provision of concrete and country rock bonding strength | |
| CN204356818U (en) | The transmission of filling concrete pile load detects arc protective device | |
| CN210421193U (en) | Device for sampling and observing over-filling of cast-in-situ bored pile | |
| CN205260062U (en) | Self -drilling tests oneself prestressing force to be let and presses slip casting stock | |
| CN105784589A (en) | Method for testing binding force of anchoring agent and rock interfaces | |
| He et al. | Experimental study on resin-anchored bolt concentricity including a device for more consistent bolt centering | |
| CN104977201A (en) | Fixed side confining rock socketed pile testing device and method thereof | |
| JP4297234B2 (en) | Anchor material fixing force measurement method | |
| CN205712499U (en) | A kind of concrete body built-in fitting | |
| CN104372793A (en) | Anti-floating method used for existing basement by adopting pre-stressed anchor cables in jet grouting pile method | |
| CN204899771U (en) | Preventing of repeatedly usable collapses dowelling jig and advances device | |
| DE102012017704A1 (en) | Arrangement for the high-strength anchoring of a tensioning rod having a tension member in a component and method for producing such an anchorage | |
| CN203639892U (en) | Ground anchor device of static sounding machine | |
| CN202881941U (en) | Embedded pipe for sampling grouting pile end | |
| CN203613538U (en) | Hollow anchor bolt with steel bar skeleton | |
| CN106979774A (en) | A kind of structure for preventing reflector plate to be blocked, device and method | |
| CN204577154U (en) | A kind of monitoring cable destruction prevention device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 Termination date: 20210115 |