CN103471757B - Device for simulating surface friction of template to research lateral pressure of concrete - Google Patents
Device for simulating surface friction of template to research lateral pressure of concrete Download PDFInfo
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- CN103471757B CN103471757B CN201310422810.1A CN201310422810A CN103471757B CN 103471757 B CN103471757 B CN 103471757B CN 201310422810 A CN201310422810 A CN 201310422810A CN 103471757 B CN103471757 B CN 103471757B
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- lateral pressure
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- 239000004567 concrete Substances 0.000 title claims abstract description 38
- 238000011160 research Methods 0.000 title claims description 23
- 239000000463 material Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000011376 self-consolidating concrete Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device for researching lateral pressure of concrete by simulating surface friction of a template, which comprises the template, a bottom plate, L-shaped plates, clamping grooves, pressure sensors and a strain acquisition instrument, wherein the two L-shaped plates are spliced into a unit, a plurality of units are overlapped up and down to form the side wall of the device and are arranged on the bottom plate, a circular groove is arranged in the middle of the long side plate surface of each L-shaped plate, the pressure sensors for measuring the lateral pressure are arranged in the circular groove, a groove is arranged in the middle of the bottom plate, the pressure sensors for measuring the vertical pressure are arranged in the groove, all the pressure sensors are connected to the strain acquisition instrument through insulated wires, the clamping grooves are arranged on the inner wall of each L-shaped plate, and. The device can simulate and measure the lateral pressure of concrete in a laboratory under the premise of considering the friction of different templates, provides data for the design of the templates in engineering, and has the advantages of flexible disassembly, cyclic utilization, low cost and the like.
Description
Technical field
The present invention relates to the device of a kind of simulated templates mantle friction research concrete lateral pressure, especially self-compacting concrete is to the device of the lateral pressure that template produces.
Background technology
In engineering practice, because operation of manually vibrating is improper, often cause the phenomenons such as swollen mould, cause larger economic loss to engineering.In recent years, self-compacting concrete becomes the important branch of Development of HPC, is more and more subject to the favor of construction party.Self-compacting concrete has without the need to vibrating, and only under gravity, is full of the model that reinforcing bar is intensive; There is high fluidity, high education resistance, high gap handling capacity; And environmental protection, decreasing construction noise without the need to vibrating, decreasing artificial.But due to the high fluidity of self-compacting concrete, cause template lateral pressure comparatively large, therefore study self-compacting concrete lateral pressure size and in time change mechanism there is important engineering significance.
At present, the device of studies in China self-compacting concrete template lateral pressure have steel pipe Simulation Study On Pressure differing heights, different mixture ratio concrete to produce side pressure, the size effect etc. that changes steel pipe sizes research different templates lateral pressure.Due to the difference of boundary condition, such as, friction between template surface out-of-flatness and chutable concrete, above-mentioned research method fails truly to reflect self-compacting concrete template lateral pressure.Therefore improve and measure concrete lateral pressure research device, to research lateral pressure, set up lateral pressure and change formula in time and have great importance.
Summary of the invention
The invention provides the device of a kind of simulated templates mantle friction research concrete lateral pressure, by in device internal fixtion unlike material template, simulation concrete and substrate interface, consider the friction between concrete and different templates, meet the needs of experiment desk research self-compacting concrete template lateral pressure.
The technical solution used in the present invention is: a kind of device of simulated templates mantle friction research concrete lateral pressure, comprise template, base plate, L-type plate, draw-in groove, pressure transducer and strain acquirement instrument, two blocks of described L-type plates are spliced into a unit mutually, multiple unit superposes this device sidewall of composition up and down, and be arranged on base plate, described L-type plate is provided with circular groove in the middle of long side plate face, the pressure transducer for measuring lateral pressure is placed in circular groove, groove is provided with in the middle of described base plate, the pressure transducer for measuring pressure at right angle is placed in groove, all pressure transducers are all connected to strain acquirement instrument by insulated line, the inwall of described L-type plate is provided with draw-in groove, template is placed with in draw-in groove.
As preferably, described base plate and L-type plate are provided with square button, square smash between open bolt hole, between upper and lower L-type plate, base plate is connected by bolt and nut at square plate place with L-type plate.
As preferably, jog is established in end, described L-type plate length limit, for two plate splicing occlusion.
As preferably, threaded hole is established in described draw-in groove end, props up template by bolt.
As preferably, in described circular groove, be provided with the external thread pipe of fixation pressure sensor.
As preferably, described external thread pipe length is greater than L-type plate thickness 10 ~ 20mm.
As preferably, described L-type plate minor face is 300 ~ 500mm, and long limit is 300 ~ 700mm, device overall height 300 ~ 3000mm after the superposition of L-type plate.。
As preferably, described base plate and L-type sheet material matter are steel or compound substance.
As preferably, described template material is plank, steel plate, or for being wiped with the concrete plank of one deck (simulation prefabricated panel).
As preferably, the square button quantity of L-type plate described in every block is 1 ~ 3.
Inside L-type plate of the present invention, draw-in groove is set, for shelving unlike material template, such as wooden model, the prefabricated board in punching block and superposed member, the frictional interface of simulation concrete and unlike material template.Simulate superimposed wall prefabricated board technical scheme: the plank of prefabricated one applicable device length of side size, plank two ends reserve 5cm, and insert draw-in groove activity space for template, remainder smears a layer concrete, treats concrete hardening, is inserted into base plate from device draw-in groove.
Beneficial effect: the present invention can record the lateral pressure of concrete in casting process and pressure at right angle, and then can draw the impact of friction factor.The present invention cannot the interface friction of template during actual casting concrete in real simulation engineering in order to overcome in laboratory, is research template friction supplying method, for Practical Project stencil design provides engineering data.The present invention has the economy of experiment desk research concrete blinding lateral pressure.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention overall schematic;
Fig. 2 is apparatus of the present invention side schematic view one;
Fig. 3 is apparatus of the present invention side schematic view two;
Fig. 4 is apparatus of the present invention schematic internal view;
Fig. 5 is apparatus of the present invention L-type plate schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As Figure 1-5, a kind of device of simulated templates mantle friction research concrete lateral pressure, comprises template, base plate 1, L-type plate 2, bolt hole 3, bolt 4, nut 5, circular groove 6, external thread pipe 7, draw-in groove 8, square button 9, pressure transducer, insulated line 10, strain acquirement instrument, bottom plate groove 11.Between described base plate 1 and L-type plate 2, connected by bolt 3 at square button 9 place between L-type plate 2.Described L-type plate 2 inside is provided with draw-in groove 8, and bolt hole 3 is established in draw-in groove 8 end.Described template is inserted into base plate 1 from draw-in groove 8.Described L-type plate 2 establishes threaded circular groove 6, placement force sensor in circular groove 6 in the middle of long side plate face.Described external thread pipe 7 is screwed in circular groove 6.The insulated line 10 of described pressure transducer is drawn and is connected with strainmeter inside external thread pipe 7.
Establish groove in the middle of described base plate 1, for placement force sensor, measure pressure at right angle, pressure transducer insulated line is drawn from device cavity, is connected to strainmeter.Described L-type plate 2 is highly 300 ~ 500mm, and multistage L-type plate 2 is connected at square 9 places that buckle down through bolt 4, and L-type plate 2 longer sides length can be 300mm ~ 500mm.Jog is established in end, L-type plate 2 length limit, for two plate splicing occlusion.Draw-in groove 8 is set inside L-type plate 2, for shelving unlike material template, such as wooden model, the prefabricated board in punching block and superposed member.Described simulation superimposed wall prefabricated board mould plate technique scheme: the plank of prefabricated one applicable device length of side size, plank two ends reserve 5cm, and insert draw-in groove activity space for template, remainder smears a layer concrete, treat concrete hardening, be inserted into base plate 1 from device draw-in groove 8.Described draw-in groove 8 establishes threaded hole, uses bolt 3 to prop up template.Have circular groove 6 outside L-type plate 2, generally, for placement force sensor, circular groove 6 is furnished with external thread pipe 7 for size and pressure transducer, and sensor insulated line 10 is drawn from external thread pipe 7 inside, is connected with strainmeter.Described external thread pipe 7 length is greater than L-type plate 2 thickness 10 ~ 20mm.
Measuring method and principle illustrate:
This measuring method is intended to measure lateral pressure, under known concrete in static hydraulic pressure force value prerequisite, utilizes following formula can obtain measuring the scale-up factor of pressure and hydrostatic pressing force value, for Practical Project provides stencil design data.
σ
P＝Kσ
h(1)；
σ
h＝γ
cH(2)。
σ
p-lateral pressure; σ
h-concrete in static hydraulic pressure force value; γ
c-concrete severe; H-device inner concrete height; K-wall pressure and hydrostatic pressing force value ratio
Implementation step:
1, erecting device, and insert template;
2, in device side along certain altitude setting pressure sensor, and be connected to Acquisition Instrument;
3, to the inner casting concrete of device, and data acquisition is carried out;
4, through type (1) calculates K value.
In this measuring method, K value can be Practical Project and provides stencil design data.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each ingredient not clear and definite in the present embodiment is realized.
Claims (10)
1. the device of a simulated templates mantle friction research concrete lateral pressure, it is characterized in that: comprise template, base plate, L-type plate, draw-in groove, pressure transducer and strain acquirement instrument, two blocks of described L-type plates are spliced into a unit mutually, multiple unit superposes this device sidewall of composition up and down, and be arranged on base plate, described L-type plate is provided with circular groove in the middle of long side plate face, the pressure transducer for measuring lateral pressure is placed in circular groove, groove is provided with in the middle of described base plate, the pressure transducer for measuring pressure at right angle is placed in groove, all pressure transducers are all connected to strain acquirement instrument by insulated line, the inwall of described L-type plate is provided with draw-in groove, template is placed with in draw-in groove.
2. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 1, it is characterized in that: described base plate and L-type plate are provided with square button, square smash between open bolt hole, between upper and lower L-type plate, base plate is connected by bolt and nut in square buckle with L-type plate.
3. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 1, is characterized in that: jog is established in end, described L-type plate length limit, for two plate splicing occlusion.
4. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 1, is characterized in that: threaded hole is established in described draw-in groove end, props up template by bolt.
5. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 1, is characterized in that: the external thread pipe being provided with fixation pressure sensor in described circular groove.
6. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 5, is characterized in that: described external thread pipe length is greater than L-type plate thickness 10 ~ 20mm.
7. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 1, is characterized in that: described L-type plate bond length is 300 ~ 500mm, and long edge lengths is 300 ~ 700mm, device overall height 300 ~ 3000mm after the superposition of L-type plate.
8. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 1, is characterized in that: described base plate and L-type sheet material matter are steel or compound substance.
9. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 1, is characterized in that: described template material is plank, steel plate, or for being wiped with the concrete plank of one deck.
10. the device of a kind of simulated templates mantle friction research concrete lateral pressure according to claim 2, is characterized in that: described in every block, the square button quantity of L-type plate is 1 ~ 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310422810.1A CN103471757B (en) | 2013-09-16 | 2013-09-16 | Device for simulating surface friction of template to research lateral pressure of concrete |
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| CN201310422810.1A CN103471757B (en) | 2013-09-16 | 2013-09-16 | Device for simulating surface friction of template to research lateral pressure of concrete |
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| CN103471757A CN103471757A (en) | 2013-12-25 |
| CN103471757B true CN103471757B (en) | 2015-07-01 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104251801B (en) * | 2014-09-12 | 2016-11-30 | 上海建工集团股份有限公司 | For measuring the test device of concrete blinding lateral pressure |
| CN108396655A (en) * | 2018-05-14 | 2018-08-14 | 湖州南浔亿康机械有限公司 | A kind of modular bridge beam forms |
| DE102020102542A1 (en) | 2020-02-01 | 2021-08-05 | Hochschule Bochum | Sample rack and method of sampling when testing concrete |
| CN111928983B (en) * | 2020-09-22 | 2021-01-05 | 上海建工集团股份有限公司 | Concrete formwork lateral pressure monitoring device and method |
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| JPH09178626A (en) * | 1995-12-22 | 1997-07-11 | Ohbayashi Corp | Concrete testing method and framework for test |
| CN2663975Y (en) * | 2003-12-17 | 2004-12-15 | 中交第一公路勘察设计研究院 | A specimen mold for cement-soil mixing proportion test |
| CN101358455A (en) * | 2008-08-14 | 2009-02-04 | 上海交通大学 | Lateral earth pressure sensor embedment method and device in earth |
| CN102175382A (en) * | 2011-01-28 | 2011-09-07 | 哈尔滨工业大学 | Detecting device for detecting lateral pressure of great-mobility concrete template |
| CN102589774A (en) * | 2011-12-21 | 2012-07-18 | 山东科技大学 | Anchoring interface stress testing device and testing method thereof |
| KR20120083696A (en) * | 2011-01-18 | 2012-07-26 | 연세대학교 산학협력단 | Apparatus and system for measuring deformation of concrete structure under blast loading |
| CN102778389A (en) * | 2012-06-29 | 2012-11-14 | 哈尔滨工程大学 | Concrete test loading device and test method under load and multifactor coupling |
| CN203422184U (en) * | 2013-09-16 | 2014-02-05 | 南京工业大学 | Device for simulating surface friction of template to research lateral pressure of concrete |
-
2013
- 2013-09-16 CN CN201310422810.1A patent/CN103471757B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178626A (en) * | 1995-12-22 | 1997-07-11 | Ohbayashi Corp | Concrete testing method and framework for test |
| CN2663975Y (en) * | 2003-12-17 | 2004-12-15 | 中交第一公路勘察设计研究院 | A specimen mold for cement-soil mixing proportion test |
| CN101358455A (en) * | 2008-08-14 | 2009-02-04 | 上海交通大学 | Lateral earth pressure sensor embedment method and device in earth |
| KR20120083696A (en) * | 2011-01-18 | 2012-07-26 | 연세대학교 산학협력단 | Apparatus and system for measuring deformation of concrete structure under blast loading |
| CN102175382A (en) * | 2011-01-28 | 2011-09-07 | 哈尔滨工业大学 | Detecting device for detecting lateral pressure of great-mobility concrete template |
| CN102589774A (en) * | 2011-12-21 | 2012-07-18 | 山东科技大学 | Anchoring interface stress testing device and testing method thereof |
| CN102778389A (en) * | 2012-06-29 | 2012-11-14 | 哈尔滨工程大学 | Concrete test loading device and test method under load and multifactor coupling |
| CN203422184U (en) * | 2013-09-16 | 2014-02-05 | 南京工业大学 | Device for simulating surface friction of template to research lateral pressure of concrete |
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