CN204758600U - Big mobile concrete form lateral pressure simulating measurement setup - Google Patents
Big mobile concrete form lateral pressure simulating measurement setup Download PDFInfo
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- CN204758600U CN204758600U CN201520369653.7U CN201520369653U CN204758600U CN 204758600 U CN204758600 U CN 204758600U CN 201520369653 U CN201520369653 U CN 201520369653U CN 204758600 U CN204758600 U CN 204758600U
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Abstract
Big mobile concrete form lateral pressure simulating measurement setup, including container, pressure maintaining device, piezometry device, pressure maintaining device, piezometry device all adorn the container on, wherein the pressure maintaining device the gas outlet with container intercommunication, the piezometry device establish the container lower part, and the pressure measurement end embedding container of piezometry device in. The beneficial effects of the utility model are that: atmospheric pressure is exerted to the utilization between rubber membrane and upper cover plate, utilize the large deformation characteristic of rubber membrane, transmits atmospheric pressure for big mobile concreted structure through purpose -built rubber membrane to the big mobile concrete of realization in to a stainless steel round section of thick bamboo pressurizes, in order to simulate the normal pressure that the upper portion concrete was exerted under the high condition of different pouring to the lower part concrete. Adopt this load method, can effectively prevent to improve the accuracy of test result because the pressurization causes grout body bleeding and bleeding in the concrete.
Description
Technical field
The utility model relates to a kind of Cracking of High Flowing Concrete form lateral pressure simulating test device, belongs to concrete works structured testing technical field.
Background technology
At present, generally commodity packing design is adopted in engineering, more develop a kind of self-compacting concrete in recent years, there is the feature such as large fluidity and low slump loss, its once-cast height is large, can shorten and build the duration, accelerating construction progress, and can reduce or avoid manual operation to the adverse effect of concrete performance (as air content), ensure concrete uniformity and permanance.Traditional view is thought, due to its high fluidity, the hydrostatic force that Cracking of High Flowing Concrete produces all is applied in template, thus during stencil design, usually relatively conservative, thus adds construction cost.But research shows, Cracking of High Flowing Concrete is relevant with its rheological property to form lateral pressure.
For research has the Cracking of High Flowing Concrete of different rheological properties to the impact of form lateral pressure, conventional template wall pressure measuring method is the size of extrapolability suffered by the template by testing differing heights place, but this method is mainly in Practical Project, the die size adopted is large, processed complex, test process concrete amount used is large, the cast limited height of test, is not suitable for a large amount of tests in laboratory study performance history.
Domestic patent of invention ZL201110031572.2 provides a kind of Cracking of High Flowing Concrete form lateral pressure proving installation, this device utilizes screw jack and steel cylinder packed-piston to pressurize to simulate the concrete under different cast height condition to the Cracking of High Flowing Concrete in circular steel cylinder, by two concrete form lateral pressures of pressure transducer Real-Time Monitoring, there is circular steel barrel structure size little, concrete amount is little, the advantages such as concrete test height is unrestricted, but this device need be sealed Cracking of High Flowing Concrete by steel cylinder packed-piston, its seal request is high.If sealing does not reach requirement, the cement paste in concrete under pressure, will be secreted, affect measurement result around packed-piston; If sealing is excessively good, between packed-piston and cylinder, frictional resistance is excessive, then the pressure that records of data collecting instrument and pressure transducer and the normal pressure suffered by Cracking of High Flowing Concrete reality are probably and inconsistent.
Summary of the invention
In order to solve existing laboratory Cracking of High Flowing Concrete form lateral pressure simulating test device exist cement paste under pressure easy secrete around packed-piston with concrete suffered by actual pressure and data acquisition display instrument inconsistent, cause the problems such as measurement result is inaccurate, the utility model provides a kind of measurement result Cracking of High Flowing Concrete form lateral pressure simulating test device accurately.
Cracking of High Flowing Concrete form lateral pressure simulating test device described in the utility model, it is characterized in that: comprise container, pressure maintenance device, pressure measuring unit, described pressure maintenance device, pressure measuring unit are all contained on described container, the gas outlet of wherein said pressure maintenance device and described reservoir, described pressure measuring unit is located at described lower vessel portion, and the pressure measurement end of described pressure measuring unit embeds in container;
Described container comprises cylinder, upper cover plate and lower shoe, and described cylinder upper surface and described upper cover plate are tightly connected, and described cylinder lower surface and described lower shoe are tightly connected or one-body molded; Rubber membrane is accompanied between described cylinder upper surface and upper cover plate; Described upper cover plate is provided with the gas admittance valve and vent valve that are communicated with cylinder bore;
Described pressure maintenance device comprises controller, air compressor machine and pressure switch, and described pressure switch is arranged on upper cover plate, and the pressure sensitive head of pressure switch was communicated with rubber membrane upper cavity by communicating pipe;
The signal input pin of described controller and the signal output pin of described pressure switch are electrically connected, the signal output pin of described controller and the control pin of described air compressor machine are electrically connected, the gas outlet of described air compressor machine and the gas admittance valve pipeline communication of upper cover plate;
Described pressure measuring unit comprises pressure unit, data acquisition instrument, and described pressure unit is arranged on cylinder bottom, and the measuring diaphragm of pressure unit stretches in cylinder; The signal input part of described data acquisition instrument is connected with the signal output part of described pressure unit.
Be tightly connected by screw bolt and nut between described cylinder upper surface and upper cover plate.
Described rubber membrane both sides are respectively arranged with rubber washer.
The sidewall symmetry of described cylinder bottom arranges 2 thread circle holes, the distance of thread circle hole center and cylinder lower surface is 60mm ~ 100mm, respectively to be tightly connected 1 flat film tailored version pressure unit by screw thread in described thread circle hole, described data acquisition instrument is multi-Channels Data Acquisition table, and namely each described pressure unit connects to the corresponding port of same data acquisition instrument.
Described cylinder is open at both ends, and described cylinder bore diameter is 150mm ~ 300mm, is highly 280mm ~ 600mm; Described cylinder two ends are thick, intermediate thin, and two ends wall thickness is 30mm ~ 50mm, and middle wall thickness is 5mm ~ 15mm, and two ends thick wall part height is 10mm ~ 15mm.
During described cylinder open at both ends, accompany rubber washer between described cylinder lower surface and described lower shoe, and cylinder and described lower shoe are tightly connected by screw bolt and nut.
Described cylinder and lower shoe one-body molded, namely described cylinder one end open, at the bottom of described cylinder cylinder with cylinder cambered surface by being rigidly connected; Described cylinder bore diameter is 150 ~ 300mm, is highly 280 ~ 500mm; Described cylinder is that upper end is thick, the cylinder that other parts are thin, and upper end wall thickness is 30 ~ 50mm, and thick wall part height is 15 ~ 30mm, and other parts wall thickness is 5 ~ 15mm.
Described rubber membrane is cylindrically uncoveredly have end rubber membrane, and rubber membrane intracavity diameter is consistent with stainless steel cylinder, and distance 20 ~ 30mm place, rubber membrane edge suitable for reading arranges equally distributed 6 bolts hole.
Utilize proving installation described in the utility model to carry out analog detection method to Cracking of High Flowing Concrete form lateral pressure, comprise the following steps:
(1) pressure unit is connected with seal of vessel, guarantees not spillage after pressurization;
(2) with the even brushing inner surface of container of machine oil, warranty test terminates rear concrete can the demoulding smoothly;
(3) if container open at both ends time, cylinder and lower shoe are sealed and are fastenedly connected; If when one end is uncovered, omit this step;
(4) by the Cracking of High Flowing Concrete of newly mixing continuously and pour into lentamente in container, be added to and stop from container nozzle 0.25 ~ 1.0cm place;
(5) be tightly connected after pressing from both sides rubber membrane between container upper end face and upper cover plate;
(6) pressure switch critical pressure value is set, pressure switch displayed value is reset; Open gas admittance valve, close vent valve, open controller, air compressor machine is started working, between rubber membrane and upper cover plate, apply air pressure, and after pressure reaches setting value, pressure switch outputs signal, and controller cuts out, and air compressor machine quits work; Pressure is lower than after setting value, and pressure switch outputs signal, and controller is opened, and air compressor machine restarts work; So go round and begin again, pump into gas between rubber membrane and upper cover plate, and keep the air pressure between rubber membrane and upper cover plate constant all the time;
(7) concrete pressure data to be measured is gathered by data acquisition instrument;
(8) exit after pressure test, remove and all parts of clean container.
The beneficial effects of the utility model are: by applying air pressure between rubber membrane and upper cover plate, utilize the large deformation characteristic of rubber membrane, air pressure is passed to Cracking of High Flowing Concrete surface by special rubber membrane, thus realize pressurizeing to the Cracking of High Flowing Concrete in stainless steel cylinder, to simulate the normal pressure that top concrete under different cast height condition applies bottom concrete.Adopt this loading method, can effectively prevent from, because pressurization causes cement slurry bleeding and bleeding in concrete, improving the accuracy of test result.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the front elevation of cylinder described in the utility model.
Fig. 3 is the vertical view of upper cover plate described in the utility model.
Fig. 4 is the vertical view of lower shoe described in the utility model.
Fig. 5 is the front elevation of rubber membrane described in the utility model.
Fig. 6 is the vertical view of rubber membrane described in the utility model.
Fig. 7 is the vertical view of rubber washer described in the utility model.
Fig. 8 is the front elevation of stainless steel cylinder described in the utility model.
Embodiment
The utility model is further illustrated below in conjunction with accompanying drawing
With reference to accompanying drawing:
Embodiment 1 Cracking of High Flowing Concrete form lateral pressure described in the utility model simulating test device, comprise container, pressure maintenance device, pressure measuring unit, described pressure maintenance device, pressure measuring unit are all contained on described container, the gas outlet of wherein said pressure maintenance device and described reservoir, described pressure measuring unit is located at described lower vessel portion, and the pressure measurement end of described pressure measuring unit embeds in container;
Described container comprises cylinder, upper cover plate and lower shoe, and described cylinder upper surface and described upper cover plate are tightly connected, and described cylinder lower surface and described lower shoe are tightly connected or one-body molded; Rubber membrane is accompanied between described cylinder upper surface and upper cover plate; Described upper cover plate is provided with the gas admittance valve and vent valve that are communicated with cylinder bore;
Described pressure maintenance device comprises controller, air compressor machine and pressure switch, and described pressure switch is arranged on upper cover plate, and the pressure sensitive head of pressure switch is attached to rubber membrane upper surface;
The signal input pin of described controller and the signal output pin of described pressure switch are electrically connected, the signal output pin of described controller and the control pin of described air compressor machine are electrically connected, the gas outlet of described air compressor machine and the gas admittance valve pipeline communication of upper cover plate;
Described pressure measuring unit comprises pressure unit, data acquisition instrument, and described pressure unit is arranged on cylinder bottom, and the measuring diaphragm of pressure unit stretches in cylinder; The signal input part of described data acquisition instrument is connected with the signal output part of described pressure unit.
Be tightly connected by screw bolt and nut between described cylinder upper surface and upper cover plate.
Described rubber membrane both sides are respectively arranged with rubber washer.
Described cylinder bore diameter is 150, is highly 280mm; Described cylinder two ends are thick, intermediate thin, and two ends wall thickness is 30mm, and middle wall thickness is 10mm, and two ends thick wall part height is 15mm.
During described cylinder open at both ends, accompany rubber washer between described cylinder lower surface and described lower shoe, and cylinder and described lower shoe are tightly connected by screw bolt and nut.
Described cylinder side wall is symmetrical arranged 2 thread circle holes, the distance of described thread circle hole center and cylinder lower end is 60mm, respectively to be tightly connected 1 flat film tailored version pressure unit by screw thread in described thread circle hole, described pressure unit is connected with data acquisition instrument.
Embodiment 2 Cracking of High Flowing Concrete form lateral pressure described in the utility model analog detection method, comprises the following steps:
(1) the screw thread position sealing raw material band of flat film tailored version pressure unit 17 is packed tightly, be screwed in the thread circle hole 16 of stainless steel cylinder 1, to be tightly connected position with glass cement, to guarantee after pressurization not spillage;
(2), with machine oil even brushing stainless steel cylinder 1 inwall and lower shoe 2 upper surface, after terminating with warranty test, concrete can the demoulding smoothly;
(3) on lower shoe 2, lay rubber washer 3, then by six bolts 4 and six nuts 5, stainless steel cylinder 1 and lower shoe 2 are fastenedly connected;
(4) by newly mixing Cracking of High Flowing Concrete continuously and pour into lentamente in stainless steel cylinder, being added to and stopping from nozzle 0.25cm place;
(5) lay one deck rubber washer 3 at stainless steel cylinder nozzle, then lay special rubber membrane 7, then after laying one deck rubber washer 3, stainless steel cylinder 1 and stainless steel upper cover plate 6 bolt 4 and nut 5 are fastenedly connected;
(6) pressure switch 10 critical pressure value is set, pressure switch displayed value is reset.Open gas admittance valve 11, close vent valve 12, open controller 15, air compressor machine 14 is started working, between special rubber membrane 7 and stainless steel upper cover plate 6, apply air pressure, after pressure reaches setting value, pressure switch 10 outputs signal, and controller 15 cuts out, and air compressor machine 14 quits work.Pressure is lower than after setting value, and pressure switch 10 outputs signal, and controller 15 is opened, and air compressor machine 14 restarts work; So go round and begin again, the air pressure controlled between rubber membrane 7 and upper cover plate 6 keeps constant substantially.
(7) by data acquisition instrument 18 image data, the data acquisition computing machine of collection carries out recording and storing.
(8) after wall pressure is completed, open vent valve 12, remove flat film tailored version pressure unit 17, open upper cover plate 6 and lower shoe 2, take out Cracking of High Flowing Concrete sample, cleaning cylinder 1, upper cover plate 6 and lower shoe 2.
The proving installation that embodiment 3 builds according to the method for testing described in embodiment 2, is characterized in that: described cylinder 1 is the bottomless stainless steel cylinders in two ends, and its intracavity diameter is 300mm, is highly 600mm; Described cylinder 1 two ends wall thickness is 50mm, and middle wall thickness is 15mm, and two ends thick wall part height is 30mm; Thread circle hole 16 center of described cylinder side wall and the distance of stainless steel cylinder lower end are 100mm, and other composition, annexation and method of testing are identical with embodiment 1.
Embodiment 4: proving installation described in the utility model, is characterized in that: described cylinder 1 is the bottomless stainless steel cylinders in two ends, and its intracavity diameter is 250mm, is highly 550mm; Described stainless steel cylinder 1 two ends wall thickness is 45mm, and middle wall thickness is 10mm, and two ends thick wall part height is 20mm; Thread circle hole 16 center on described cylinder 1 sidewall and the distance of cylinder 1 lower end are 80mm, and other composition, annexation and method of testing are identical with embodiment 1.
Embodiment 5 utilizes the device of embodiment 4 to carry out in method of testing step (4), by newly mixing Cracking of High Flowing Concrete continuously and pour into lentamente in stainless steel cylinder, being added to and stopping from nozzle 1.0cm place; All the other steps are identical with the step in embodiment 2.
Embodiment 6: proving installation described in the utility model, is characterized in that: described stainless steel cylinder is one end uncovered, one end stainless steel cylinder 19 with the end, at the bottom of described stainless steel cylinder cylinder with stainless steel cylinder cambered surface by being rigidly connected.Described stainless steel cylinder, intracavity diameter is 180mm, is highly 500mm; Described stainless steel cylinder is that upper end is thick, the cylinder that other parts are thin, and upper end wall thickness is 48mm, and thick wall part height is 20mm, and other parts wall thickness is 12mm; On described cylinder 19 sidewall, the distance of symmetrically arranged thread circle hole 16 center and stainless steel cylinder 19 lower end is 90mm, and other composition, annexation and method of testing are identical with embodiment 1.
Embodiment 7 utilizes the device of embodiment 6 to carry out method of testing, comprises the following steps:
(1) the screw thread position sealing raw material band of flat film tailored version pressure unit 17 is packed tightly, be screwed in the thread circle hole 16 of stainless steel cylinder 19, to be tightly connected position with glass cement, to guarantee after pressurization not spillage;
(2), with machine oil even brushing stainless steel cylinder 19 inwall, after terminating with warranty test, concrete can the demoulding smoothly;
(3) by newly mixing Cracking of High Flowing Concrete continuously and pour into lentamente in stainless steel cylinder, being added to and stopping from nozzle 0.5cm place;
(4) lay one deck rubber washer 3 at stainless steel cylinder nozzle, then lay special rubber membrane 7, then after laying one deck rubber washer 3, stainless steel cylinder 19 and stainless steel upper cover plate 6 bolt 4 and nut 5 are fastenedly connected;
(5) pressure switch 10 critical pressure value is set, pressure switch displayed value is reset.Open gas admittance valve 11, close vent valve 12, open controller 15, air compressor machine 14 is started working, between special rubber membrane 7 and stainless steel upper cover plate 6, apply air pressure, after pressure reaches setting value, pressure switch 10 outputs signal, and controller 15 cuts out, and air compressor machine 14 quits work.Pressure is lower than after setting value, and pressure switch 10 outputs signal, and controller 15 is opened, and air compressor machine 14 restarts work.So go round and begin again, the air pressure controlled between special rubber membrane 7 and stainless steel upper cover plate 6 keeps constant substantially.
(6) by data acquisition instrument 18 image data, the data acquisition computing machine of collection carries out recording and storing.
(7) after wall pressure is completed, open vent valve 12, remove flat film tailored version pressure unit 17, open upper cover plate 6 and lower shoe 2, take out Cracking of High Flowing Concrete sample in time, cleaning stainless steel cylinder 19.
Content described in this instructions embodiment is only enumerating the way of realization that utility model is conceived; protection domain of the present utility model should not be regarded as being only limitted to the concrete form that embodiment is stated, protection domain of the present utility model also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the utility model.
Claims (8)
1. Cracking of High Flowing Concrete form lateral pressure simulating test device, it is characterized in that: comprise container, pressure maintenance device, pressure measuring unit, described pressure maintenance device, pressure measuring unit are all contained on described container, the gas outlet of wherein said pressure maintenance device and described reservoir, described pressure measuring unit is located at described lower vessel portion, and the pressure measurement end of described pressure measuring unit embeds in container;
Described container comprises cylinder, upper cover plate and lower shoe, and described cylinder upper surface and described upper cover plate are tightly connected, and described cylinder lower surface and described lower shoe are tightly connected or one-body molded; Rubber membrane is accompanied between described cylinder upper surface and upper cover plate; Described upper cover plate is provided with the gas admittance valve and vent valve that are communicated with cylinder bore;
Described pressure maintenance device comprises controller, air compressor machine and pressure switch, and described pressure switch is arranged on upper cover plate, and the pressure sensitive head of pressure switch was communicated with rubber membrane upper cavity by communicating pipe;
The signal input pin of described controller and the signal output pin of described pressure switch are electrically connected, the signal output pin of described controller and the control pin of described air compressor machine are electrically connected, the gas outlet of described air compressor machine and the gas admittance valve pipeline communication of upper cover plate;
Described pressure measuring unit comprises pressure unit, data acquisition instrument, and described pressure unit is arranged on cylinder bottom, and the measuring diaphragm of pressure unit stretches in cylinder; The signal input part of described data acquisition instrument is connected with the signal output part of described pressure unit.
2. Cracking of High Flowing Concrete form lateral pressure simulating test device as claimed in claim 1, be is characterized in that: be tightly connected by screw bolt and nut between described cylinder upper surface and upper cover plate.
3. Cracking of High Flowing Concrete form lateral pressure simulating test device as claimed in claim 1, is characterized in that: described rubber membrane both sides are respectively arranged with rubber washer.
4. Cracking of High Flowing Concrete form lateral pressure simulating test device as claimed in claim 3, it is characterized in that: described cylinder side wall is symmetrical arranged 2 thread circle holes, the distance of described thread circle hole center and cylinder lower end is 60 ~ 100mm, respectively to be tightly connected 1 flat film tailored version pressure unit by screw thread in described thread circle hole, described data acquisition instrument is multi-Channels Data Acquisition table, and namely each described pressure unit connects to the corresponding port of same data acquisition instrument.
5. Cracking of High Flowing Concrete form lateral pressure simulating test device as claimed in claim 4, it is characterized in that: described cylinder is open at both ends, described cylinder bore diameter is 150 ~ 300mm, is highly 280 ~ 600mm; Described cylinder two ends are thick, intermediate thin, and two ends wall thickness is 30 ~ 50mm, and middle wall thickness is 5 ~ 15mm, and two ends thick wall part height is 10 ~ 15mm.
6. Cracking of High Flowing Concrete form lateral pressure simulating test device as claimed in claim 5, it is characterized in that: during described cylinder open at both ends, accompany rubber washer between described cylinder lower surface and described lower shoe, and cylinder and described lower shoe are tightly connected by screw bolt and nut.
7. Cracking of High Flowing Concrete form lateral pressure simulating test device as claimed in claim 6, is characterized in that: described cylinder is one-body molded with lower shoe, namely described cylinder one end open, at the bottom of described cylinder cylinder and cylinder cambered surface by being rigidly connected; Described cylinder bore diameter is 150 ~ 300mm, is highly 280 ~ 500mm; Described cylinder is that upper end is thick, the cylinder that other parts are thin, and upper end wall thickness is 30 ~ 50mm, and thick wall part height is 15 ~ 30mm, and other parts wall thickness is 5 ~ 15mm.
8. Cracking of High Flowing Concrete form lateral pressure simulating test device as claimed in claim 4, it is characterized in that: described rubber membrane is cylindrically uncoveredly have end rubber membrane, rubber membrane intracavity diameter is consistent with stainless steel cylinder, and distance 20 ~ 30mm place, rubber membrane edge suitable for reading arranges equally distributed 6 bolts hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369653.7U CN204758600U (en) | 2015-06-01 | 2015-06-01 | Big mobile concrete form lateral pressure simulating measurement setup |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369653.7U CN204758600U (en) | 2015-06-01 | 2015-06-01 | Big mobile concrete form lateral pressure simulating measurement setup |
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| CN204758600U true CN204758600U (en) | 2015-11-11 |
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| CN201520369653.7U Expired - Fee Related CN204758600U (en) | 2015-06-01 | 2015-06-01 | Big mobile concrete form lateral pressure simulating measurement setup |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018753A (en) * | 2016-07-20 | 2016-10-12 | 中国矿业大学 | System and method for compression test of filling flyash slurry in overburden rock isolated injection |
| 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 |
| CN108007757A (en) * | 2017-12-28 | 2018-05-08 | 四川中核艾瑞特工程检测有限公司 | A kind of pervious concrete test block form removal auxiliary device and form removal method |
-
2015
- 2015-06-01 CN CN201520369653.7U patent/CN204758600U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018753A (en) * | 2016-07-20 | 2016-10-12 | 中国矿业大学 | System and method for compression test of filling flyash slurry in overburden rock isolated injection |
| CN106018753B (en) * | 2016-07-20 | 2019-06-04 | 中国矿业大学 | Grouting filling flyash slurry compression experiment system and method is isolated in overlying strata |
| 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 |
| CN108007757A (en) * | 2017-12-28 | 2018-05-08 | 四川中核艾瑞特工程检测有限公司 | A kind of pervious concrete test block form removal auxiliary device and form removal method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20180601 |
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| CF01 | Termination of patent right due to non-payment of annual fee |