CN106644929A - Measuring device and measuring method of friction factors between concrete and mold plate - Google Patents
Measuring device and measuring method of friction factors between concrete and mold plate Download PDFInfo
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- CN106644929A CN106644929A CN201710037477.0A CN201710037477A CN106644929A CN 106644929 A CN106644929 A CN 106644929A CN 201710037477 A CN201710037477 A CN 201710037477A CN 106644929 A CN106644929 A CN 106644929A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention discloses a measuring device and measuring method of friction factors between concrete and a mold plate, and belongs to the technical field of experiment testing of concrete engineering structures. An upper reaction beam is formed by that double-channel steels are oppositely and vertically placed; a lower reaction seat is a steel plate and is rectangular; the upper reaction beam is arranged at the upper part, the lower reaction seat is arranged at the lower part, and the upper reaction beam and the lower reaction seat are connected through pull rods; a pressure sensor is located at the upper end of a jack; an upper force transferring plate is arranged between the concrete and the jack, and a lower force transferring plate is arranged between the concrete and the lower reaction seat; a steel mold plate is formed by the welding of the steel plate; the concrete is cast among the steel mold plate, the upper force transferring plate and the lower force transferring plate; cushion blocks are symmetrically arranged between the steel mold plate and the lower reaction seat; rectangular opening holes are symmetrically formed in a front side wall and a rear side wall of the steel mold plate; a mold plate strip penetrates through the concrete from one opening hole formed in one end and penetrates out from one opening hole formed in the other end. Through the adoption of the simple measuring device and simple measuring method of the friction factors between the concrete and the mold plate, provided by the invention, a parameter foundation is provided for further studying of side pressure of the mold plate of the concrete.
Description
Technical field
The present invention relates to friction coefficient measuring apparatus and measuring method between a kind of concrete and template, belong to concreter
Journey structural test technical field of measurement and test.
Background technology
At present, although the stencil design of concrete works is guarded very much, the swollen mould accident of template of concrete works is still
There is generation, engineering circles increasingly pay attention to the security of form work engineering in concrete works.Relevant research shows, concrete and punching block
Frictional force between plate to the force analysis of steel form be designed with very important impact.Prior art has the big stream of direct measurement
The test device of dynamic property concrete blinding lateral pressure, it is then infeasible for normal concrete, measurement concrete is not yet found at present
The measurement apparatus and correlation technique of coefficient of friction between template.
The content of the invention
It is an object of the invention to provide friction coefficient measuring apparatus and measuring method between a kind of concrete and template, more
The vacancy for stating prior art is filled, and it is easy to operate, safe and reliable, and the form lateral pressure further to study concrete is provided
Parameter basis.
The technical scheme is that：
Friction coefficient measuring apparatus between concrete and template, the device includes pressure sensor 1, jack 2, upper power transmission
Plate 3, steel form 4, rectangular open hole 5, template bar 6, lower force transmitting board 7, cushion block 8, lower counter-force seat 9, upper reaction beam 10, pull bar 11,
Connecting pin bolt 12, pulling force Acquisition Instrument 13, traction wheel shaft 14 and axle support 15, wherein upper reaction beam 10 is distinguished with lower counter-force seat 9
Arrange up and down and connected by pull bar 11, lower force transmitting board 7 is arranged on lower counter-force seat 9 with cushion block 8, lower counter-force seat 9 is steel plate,
Rectangular, steel form 4 is arranged on cushion block 8, and rectangular open hole 5 is symmetrically arranged with the front-rear side walls of steel form 4, and pressure is passed
Sensor 1 is arranged on the top of jack 2, and jack 2 and pressure sensor 1 are arranged between reaction beam 10 and upper force transmitting board 3；
Traction wheel shaft 14 is connected with template bar 6 by connecting pin bolt 12, and traction wheel shaft 14 is fixed on axle support 15, axle support 15
Consolidate with lower counter-force seat 9.
Upper reaction beam 10, lower counter-force seat 9 and pull bar 11 form reaction frame, and upper reaction beam 10 is relative to lower counter-force seat 9
Height adjustable.
Upper reaction beam 10 from double flute steel back to, stand up arrangement, space is left between double flute steel and is passed through for pull bar 11.
Lower force transmitting board 7 is consolidated with lower counter-force seat 9, and cushion block 8 is only contacted with lower counter-force seat 9, steel form 4 and lower force transmitting board 7,
It is not connected to.
Steel form 4 is welded by four blocks of steel plates, and steel plate is highly 300～500mm, and length is 500～1000mm.
The quantity of rectangular open hole 5 determines according to 4 sizes of actual steel form.
The material of template bar 6 is the steel form or plank sheathing etc. commonly used in construction.
Friction coefficient measuring apparatus and measuring method between the concrete carried out using said apparatus and template, the method bag
Include following steps：
1) to casting concrete in steel form 4, template bar 6 is placed；
2) install force transmitting board 3, jack 2, pressure sensor 1 and upper reaction beam 10, and make pressure sensor 1 with it is upper
Reaction beam is in close contact；
3) cushion block 8 is removed；
4) vertical normal pressure is applied by jack 2, normal pressure numerical value is measured by pressure sensor 1；
5) uniform speed slow of template bar 6 is drawn into the end of template bar 6 without departing from its corresponding rectangle using traction wheel shaft 14
Open pore, and pulling force numerical value is measured by pulling force Acquisition Instrument 13；
6) friction between concrete and template bar 6 can be tried to achieve by Coulomb friction law and surveyed normal pressure and pulling force
Coefficient.
The purpose for removing cushion block 8 is to enable steel form 4 synchronous when jack 2 applies vertical normal pressure with template bar 6
Displacement, it is to avoid template bar is constrained by steel form and bent, reduces measure error.
During measurement concreting steel form 4, between force transmitting board 3 and lower force transmitting board 7, template bar 6 is placed on punching block
In rectangular open hole 5 on the side wall of plate 4 and through poured concrete.
Under equal conditions, different size of normal pressure is applied by jack 2, tries to achieve multigroup coefficient of friction, jack 2
The normal pressure for being applied is larger, then the relative error of required coefficient of friction is less.
Difference is applied by jack 2 and pours the corresponding vertical normal pressure of height concrete, it is to avoid directly poured higher
Concrete sample.
It is accomplished to the intermittent time length before starting to measure to study concrete and template by change concreting
Between coefficient of friction over time.
Coefficient of friction between different qualities concrete and template is measured by changing concrete property.
The invention has the beneficial effects as follows：
The present invention relates to friction coefficient measuring apparatus and measuring method between a kind of concrete and template, solve current
Technology vacancy, can use different qualities concrete.Under equal conditions, can by jack apply it is different size of just
Pressure, measures multigroup coefficient of friction, and the normal pressure that jack is applied is larger, and the relative error of required coefficient of friction is less.Can
The corresponding vertical normal pressure of height concrete is poured to apply difference by jack, it is to avoid directly pour higher concrete
Test specimen.Apparatus of the present invention principle understands that operation is simple, for those of ordinary skill can realize.
Description of the drawings
Fig. 1 is the structure front view of the present invention；
Fig. 2 is the structural side view of the present invention；
In figure, 1 is pressure sensor, 2 is jack, 3 is upper force transmitting board, 4 is steel form, 5 is rectangular open hole, 6 are
Template bar, 7 be lower force transmitting board, 8 be cushion block, 9 be lower counter-force seat, 10 be upper reaction beam, 11 be pull bar, 12 be connecting pin bolt, 13
For pulling force Acquisition Instrument, 14 for traction wheel shaft, 15 be axle support.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail with specific embodiment.
As shown in Fig. 2 friction coefficient measuring apparatus between a kind of concrete and template, including pressure sensor 1, jack
2nd, upper force transmitting board 3, steel form 4, rectangular open hole 5, template bar 6, lower force transmitting board 7, cushion block 8, lower counter-force seat 9, upper reaction beam 10,
Pull bar 11, connecting pin bolt 12, pulling force Acquisition Instrument 13, traction wheel shaft 14 and axle support 15.Upper reaction beam 10 from double flute steel back to,
Arrangement is stood up, space is left between double flute steel and is passed through for pull bar 11, upper reaction beam 10 is arranged up and down respectively and passed through with lower counter-force seat 9
Pull bar 11 connects, and upper reaction beam 10, lower counter-force seat 9 and pull bar 11 form reaction frame；Lower force transmitting board 7 is arranged in down with cushion block 8
On counter-force seat 9, lower force transmitting board 7 is consolidated with lower counter-force seat 9, and cushion block 8 is with lower counter-force seat 9, steel form 4 and lower force transmitting board 7 only
Contact, is not connected to, and the quantity of cushion block 8 should be at least so that steel form 4 produce significantly inclination, and such as the present embodiment is padded using two pieces
Block；Steel form 4 is arranged on cushion block 8, is welded by four blocks of steel plates, and such as in the present embodiment, a height of 500mm of steel plate is a length of
500mm, is symmetrically arranged with the rectangular open hole 5 that five spacing are 40mm on the front-rear side walls of steel form 4, rectangular open hole 5 is a width of
40mm, a height of 5mm；Jack 2 and pressure sensor thereon 1 are arranged between reaction beam 10 and upper force transmitting board 3；Template bar
11 sectional dimensions can be width 30mm, and thickness is 2mm；Traction wheel shaft 14 is connected with template bar 6 by connecting pin bolt 12, draws wheel shaft
14 are fixed on axle support 15, and axle support 15 is consolidated with lower counter-force seat 9.
Friction coefficient measuring apparatus and measuring method, comprise the following steps between concrete of the present invention and template：
1) to casting concrete in steel form 4, template bar 6 is placed；
2) install force transmitting board 3, jack 2, pressure sensor 1 and upper reaction beam 10, and make pressure sensor 1 with it is upper
Reaction beam is in close contact；
3) cushion block 8 is removed；
4) vertical normal pressure is applied by jack 2, normal pressure numerical value is measured by pressure sensor 1；
5) uniform speed slow of template bar 6 is drawn into the end of template bar 6 without departing from its corresponding rectangle using traction wheel shaft 14
Open pore, and pulling force numerical value is measured by pulling force Acquisition Instrument 13；
6) friction between concrete and template bar 6 can be tried to achieve by Coulomb friction law and surveyed normal pressure and pulling force
Coefficient.
Step 1) in concreting process can be first to pour rectangular open hole lower-layer concrete, then in rectangular aperture
Template bar is inserted in hole, then pours layer concrete at steel form top edge 50mm.
Step 3) in remove the purpose of cushion block 8 be to make steel form 4 and template bar 6 when jack 2 applies vertical normal pressure
Being capable of synchronous shift, it is to avoid template bar is constrained by steel form and bent, reduction measure error.
Using friction coefficient measuring apparatus and measuring method, mould between the concrete and template described in specific embodiment one
The material of lath 6 can be steel form or plank sheathing conventional in construction etc..
Using friction coefficient measuring apparatus and measuring method between the concrete and template described in specific embodiment one,
Under equal conditions, different size of normal pressure can be applied by jack 2, try to achieve multigroup coefficient of friction, selecting to receive
The less result of required coefficient of friction relative error.
Using friction coefficient measuring apparatus and measuring method between the concrete and template described in specific embodiment one, lead to
Cross jack 2 and apply different size of vertical normal pressure and pour the corresponding normal pressure of height concrete simulating difference, it is to avoid
Directly pour higher concrete sample.
Friction coefficient measuring apparatus and measuring method between concrete and template described in embodiments above, simply
The more excellent case study on implementation of the present invention, the present invention lets loose in described form, pro forma change but know-why and substantive phase
The same scope for belonging to the claims in the present invention protection.
Claims (10)
1. friction coefficient measuring apparatus between a kind of concrete and template, it is characterised in that：The device includes pressure sensor
(1), jack (2), upper force transmitting board (3), steel form (4), rectangular open hole (5), template bar (6), lower force transmitting board (7), cushion block
(8), lower counter-force seat (9), upper reaction beam (10), pull bar (11), connecting pin bolt (12), pulling force Acquisition Instrument (13), traction wheel shaft
(14) and axle support (15), wherein upper reaction beam (10) arrange up and down respectively with lower counter-force seat (9) and by pull bar (11) even
Connect, lower force transmitting board (7) and cushion block (8) are arranged on lower counter-force seat (9), lower counter-force seat (9) is steel plate, rectangular, steel form
(4) it is arranged on cushion block (8), rectangular open hole (5), pressure sensor is symmetrically arranged with the front-rear side walls of steel form (4)
(1) top of jack (2) is arranged on, jack (2) and pressure sensor (1) are arranged in reaction beam (10) and upper force transmitting board
(3) between；Traction wheel shaft (14) is connected with template bar (6) by connecting pin bolt (12), and wheel shaft is fixed in traction wheel shaft (14)
On seat (15), axle support (15) is consolidated with lower counter-force seat (9).
2. friction coefficient measuring apparatus between concrete according to claim 1 and template, it is characterised in that：Upper reaction beam
(10), lower counter-force seat (9) and pull bar (11) form reaction frame, and upper reaction beam (10) is relative to the height of lower counter-force seat (9)
It is adjustable.
3. friction coefficient measuring apparatus between concrete according to claim 1 and template, it is characterised in that：Upper reaction beam
(10) from double flute steel back to, stand up arrangement, space is left between double flute steel and is passed through for pull bar (11).
4. friction coefficient measuring apparatus between concrete according to claim 1 and template, it is characterised in that：Lower force transmitting board
(7) consolidate with lower counter-force seat (9), cushion block (8) is only contacted with lower counter-force seat (9), steel form (4) and lower force transmitting board (7), do not connected
Connect.
5. friction coefficient measuring apparatus between concrete according to claim 1 and template, it is characterised in that：Steel form
(4) it is welded by four blocks of steel plates, steel plate is highly 300～500mm, length is 500～1000mm.
6. friction coefficient measuring apparatus between concrete according to claim 5 and template, it is characterised in that：Steel form
(4) rectangular open hole (5) is symmetrically arranged with front-rear side walls, the quantity of rectangular open hole (5) can be according to actual punching block board size
It is determined that.
7. friction coefficient measuring apparatus between concrete according to claim 1 and template, it is characterised in that：Template bar
(6) material is steel form or plank sheathing.
8. friction coefficient measuring apparatus and measuring method between concrete according to claim 1 and template, its feature exists
In：Including step：
1) to the interior casting concrete of steel form (4), template bar (6) is placed；
2) force transmitting board (3), jack (2), pressure sensor (1) and upper reaction beam (10) are installed, and makes pressure sensor 1
It is in close contact with upper reaction beam；
3) cushion block (8) is removed；
4) vertical normal pressure is applied by jack (2), normal pressure numerical value is measured by pressure sensor (1)；
5) template bar (6) uniform speed slow is drawn into the end of template bar 6 without departing from its corresponding rectangle using traction wheel shaft (14)
Open pore, and pulling force numerical value is measured by pulling force Acquisition Instrument (13)；
6) the friction system between concrete and template bar (6) can be tried to achieve by Coulomb friction law and surveyed normal pressure and pulling force
Number.
9. friction coefficient measuring apparatus and measuring method between concrete according to claim 8 and template, its feature exists
In：Between steel form (4), upper force transmitting board (3) and lower force transmitting board (7), described template bar (6) is put for concreting during measurement
Put in the rectangular open hole (5) on the wall of steel form (4) side and through poured concrete.
10. friction coefficient measuring apparatus between concrete according to claim 1 and template, it is characterised in that：Equal
Under the conditions of, different size of normal pressure is applied by jack (2), try to achieve multigroup coefficient of friction；By changing concreting
Be accomplished to start measure before intermittent time length, research concrete and template between coefficient of friction over time；It is logical
Change coagulation soil characteristics is crossed, the coefficient of friction between different qualities concrete and template is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710037477.0A CN106644929A (en) | 2017-01-18 | 2017-01-18 | Measuring device and measuring method of friction factors between concrete and mold plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710037477.0A CN106644929A (en) | 2017-01-18 | 2017-01-18 | Measuring device and measuring method of friction factors between concrete and mold plate |
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| CN106644929A true CN106644929A (en) | 2017-05-10 |
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| CN201710037477.0A Pending CN106644929A (en) | 2017-01-18 | 2017-01-18 | Measuring device and measuring method of friction factors between concrete and mold plate |
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Cited By (5)
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| CN109975204A (en) * | 2019-05-08 | 2019-07-05 | 中交隧道工程局有限公司 | A kind of high mountain artificial snow-making pipeline testing device for friction coefficient and its method |
| CN110146441A (en) * | 2019-06-14 | 2019-08-20 | 辽宁工程技术大学 | For measuring the experimental rig of the dynamic friction coefficient of concrete structure and the soil body |
| CN110567871A (en) * | 2019-07-23 | 2019-12-13 | 西南交通大学 | Friction experiment device, bearing mechanism, loading mechanism and friction experiment method thereof |
| CN111579407A (en) * | 2020-06-27 | 2020-08-25 | 中国科学院、水利部成都山地灾害与环境研究所 | Vertical experimental device for abrasion resistance of material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817168A (en) * | 2017-08-28 | 2018-03-20 | 北京工业大学 | The reduction coefficient measurement apparatus and measuring method of concrete blinding lateral pressure |
| CN107817168B (en) * | 2017-08-28 | 2020-09-04 | 北京工业大学 | Concrete formwork side pressure reduction coefficient measuring device and measuring method |
| CN109975204A (en) * | 2019-05-08 | 2019-07-05 | 中交隧道工程局有限公司 | A kind of high mountain artificial snow-making pipeline testing device for friction coefficient and its method |
| CN110146441A (en) * | 2019-06-14 | 2019-08-20 | 辽宁工程技术大学 | For measuring the experimental rig of the dynamic friction coefficient of concrete structure and the soil body |
| CN110146441B (en) * | 2019-06-14 | 2021-07-27 | 辽宁工程技术大学 | Test device for measuring dynamic friction coefficient of concrete structure and soil body |
| CN110567871A (en) * | 2019-07-23 | 2019-12-13 | 西南交通大学 | Friction experiment device, bearing mechanism, loading mechanism and friction experiment method thereof |
| CN111579407A (en) * | 2020-06-27 | 2020-08-25 | 中国科学院、水利部成都山地灾害与环境研究所 | Vertical experimental device for abrasion resistance of material |
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