KR20150123584A - CONCRETE MOULD lateral pressure MEASURING DEVICE - Google Patents

CONCRETE MOULD lateral pressure MEASURING DEVICE Download PDF

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Publication number
KR20150123584A
KR20150123584A KR1020140050139A KR20140050139A KR20150123584A KR 20150123584 A KR20150123584 A KR 20150123584A KR 1020140050139 A KR1020140050139 A KR 1020140050139A KR 20140050139 A KR20140050139 A KR 20140050139A KR 20150123584 A KR20150123584 A KR 20150123584A
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KR
South Korea
Prior art keywords
pressure
container
sample
measuring
vertical
Prior art date
Application number
KR1020140050139A
Other languages
Korean (ko)
Inventor
김재홍
임홍재
Original Assignee
국립대학법인 울산과학기술대학교 산학협력단
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Application filed by 국립대학법인 울산과학기술대학교 산학협력단 filed Critical 국립대학법인 울산과학기술대학교 산학협력단
Priority to KR1020140050139A priority Critical patent/KR20150123584A/en
Publication of KR20150123584A publication Critical patent/KR20150123584A/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G19/00—Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32—Safety or protective measures for persons during the construction of buildings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/10—Measuring moisture content, e.g. by measuring change in length of hygroscopic filament; Hygrometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0044—Pneumatic means

Abstract

A concrete form lateral pressure gauge is provided. According to the present invention, there is provided a container for a concrete structure, comprising: a square shaped container for containing a concrete sample for measuring a concrete form side pressure inside, a pressure plate provided on a top of a sample contained in the container, A pneumatic cylinder provided at an upper portion of the vessel for supplying air pressure to the plunger so as to apply a predetermined vertical pressure to the plunger; a pneumatic cylinder provided at a lower portion of the vessel, And a side pressure measuring part for measuring a side pressure applied to the sample in a state where the sample is subjected to vertical pressure by the pressure plate.

Description

TECHNICAL FIELD [0001] The present invention relates to a concrete pressure measuring device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete form lateral pressure gauge, and more particularly, to a concrete form lateral pressure gauge capable of quantitatively measuring a concrete form lateral pressure with time under a constant vertical pressure during concrete pouring.

Generally, since the shape of a concrete structure is made according to the shape of a form, the molding quality of the concrete is determined by a robust formwork design. If the mold collapses during the concrete pouring, the small size can lead to a dangerous large accident from the huge loss of the frame construction to the life of the worker.

Generally, the lateral pressure of concrete form is basically increased as the installation speed (m / hr) is increased, and is affected by the unit weight and temperature of concrete, and the type of admixture used.

Therefore, the general concrete formwork side pressure design has been applied to the formwork design in most of the field by applying a safety factor of about 2.0 to the maximum side pressure calculated based on the existing side pressure model formula.

However, in recent years, the increase in the use of high-strength concrete and the frequent construction of large structures have resulted in a higher lateral pressure than the lateral pressure model equation.

If high flow concrete flows well like water, the side pressure of the form should be considered as hydrostatic pressure. In other words, the side pressure of the same size as the vertical pressure due to the self weight is generated, so that the side pressure can be calculated by multiplying the concrete unit weight by the installation height. The assumption of hydrostatic pressure on the lateral pressure of the formwork is a very conservative standard. In fact, even in the case of the second high-fluid concrete, the lateral pressure is lower than the hydrostatic pressure due to the aggregate coupling. Further, the side pressure is further reduced during the putting-in time due to the thixotropy phenomenon in which the resistance characteristic against shear stress in the static state rapidly increases with time.

Therefore, there is a strong demand for a concrete form lateral pressure gauge to quantitatively measure the lateral pressure of the concrete form, which is a phenomenon caused by such complicated material characteristics.

The present invention provides a concrete form lateral pressure gauge capable of quantitatively measuring a concrete form lateral pressure with time under a condition that a concrete is subjected to a constant vertical pressure during a concrete pouring operation.

According to an embodiment of the present invention, a rectangular shaped container for containing a concrete sample for measuring a concrete form lateral pressure,

A pressure plate provided on an upper portion of the sample contained in the container, for pressing the sample vertically downward of the container,

A pneumatic cylinder provided at an upper portion of the pressure plate for supplying air pressure to the pressure plate so that a constant vertical pressure is applied to the pressure plate,

A vertical pressure measuring unit provided at a lower portion of the vessel and measuring a vertical pressure applied to the sample in the vertical direction when air pressure acts on the pressure plate,

And a side pressure measuring part provided on at least one wall of the container for measuring a side pressure applied to the sample while the sample is subjected to vertical pressure by the pressure plate.

According to another embodiment of the present invention, there is provided a container having a cylindrical shape for containing a concrete sample for measuring a concrete form lateral pressure,

A pressure plate provided on an upper portion of the sample contained in the container, for pressing the sample vertically downward of the container,

A pneumatic cylinder provided at an upper portion of the pressure plate for supplying air pressure to the pressure plate so that a constant vertical pressure is applied to the pressure plate,

A vertical pressure measuring unit provided at a lower portion of the vessel and measuring a vertical pressure applied to the sample in the vertical direction when air pressure acts on the pressure plate,

And a side pressure measuring part provided on at least one wall of the container for measuring a side pressure applied to the sample while the sample is subjected to vertical pressure by the pressure plate.

The vertical pressure measuring unit may include a vertical pressure measuring sensor installed on a bottom surface of the container and measuring vertical pressure applied to the sample in the vertical direction when air pressure acts on the pressing plate.

Wherein the side pressure measuring unit is installed on a side surface of the container and is positioned at a predetermined height from a bottom surface of the container, and the sample is sidewaysly applied with a vertical pressure of a predetermined magnitude A lateral pressure measuring sensor for measuring the lateral pressure to be applied.

The lateral pressure measurement sensor may be inserted into an insertion groove formed outwardly from an inner side surface of the container.

The lateral pressure measuring sensors may be provided at a predetermined interval on the one side of the container or may be provided at a plurality of intervals.

The lateral pressure measuring sensor may be inserted into the insertion groove formed at an equal interval or at an arbitrary interval on the inner surface of the container.

Wherein the lateral pressure measuring unit is disposed on an inner circumferential surface of the container and is positioned at a predetermined height from a bottom surface of the container, and the sample is horizontally applied to the sample in a state of receiving a vertical pressure of a predetermined magnitude in the vertical direction A lateral pressure measuring sensor for measuring the lateral pressure to be applied.

The lateral pressure measurement sensor may be inserted into an insertion recess formed outwardly from the inner circumferential surface of the container.

The lateral pressure measuring sensors may be installed at an angular interval of two or three or more at circumferential direction on the inner circumferential surface of the container, or may be installed at an arbitrary angular interval.

The lateral pressure measurement sensor may be inserted into the inner circumferential surface of the container in an insertion groove formed at a predetermined angular interval or an arbitrary angular interval with respect to the center of the container.

According to this embodiment, in the case of general concrete, it is possible to measure the lateral pressure of the concrete form according to time under the condition that the concrete is subjected to a constant vertical pressure during the pouring of the concrete,

Also, by using a pneumatic cylinder, it is possible to measure the lateral pressure of the concrete form which increases with time while gradually increasing the vertical pressure to the sample,

In case of expanded concrete, it is possible to measure the lateral pressure of the expanded concrete which increases with time after fixing the pressure plate at a fixed position,

It is possible to prevent the collapse of the formwork during the concrete pouring, thereby preventing the loss of the framing work and also preventing the casualties of the workers.

1 is a schematic block diagram of a concrete form side pressure gauge according to a first embodiment of the present invention.
2 is a schematic partial schematic view of a concrete form side pressure gauge according to a second embodiment of the present invention.
3 is a schematic partial perspective view of a concrete form side pressure gauge according to a third embodiment of the present invention.
4 is a schematic partial perspective view of a concrete form side pressure gauge according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Wherever possible, the same or similar parts are denoted using the same reference numerals in the drawings.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

1 is a schematic block diagram of a concrete form side pressure gauge according to a first embodiment of the present invention.

1, a concrete form side pressure gauge according to a first embodiment of the present invention includes a container 100 for containing a concrete sample 10 for measuring the lateral pressure of a concrete form inside,

A pressure plate 200 provided at an upper portion of the sample 10 contained in the container 100 and for pressing the sample 10 vertically downward of the container 100,

A pneumatic cylinder 300 provided at an upper portion of the pressure plate 200 for supplying air pressure to the pressure plate 200 so as to apply a constant vertical pressure,

A vertical pressure measuring unit 400 provided at a lower portion of the container 100 for measuring a vertical pressure applied to the sample 10 in a vertical direction when air pressure is applied to the pressure plate 200,

And a side pressure measuring unit 500 for measuring a side pressure applied to the sample while the sample is being subjected to vertical pressure by the pressure plate 200, at least one of which is provided on the wall of the container.

Here, the vertical direction applied to the sample 100 refers to the vertical direction of the container, that is, the vertical direction in FIG.

A water content measuring unit 600 for measuring the amount of water exuding from the sample 10 when air pressure acts on the pressure plate 200 may be installed in the lower part of the container 100.

In addition, the pneumatic cylinder 300 may be connected to a pressure vessel 700 in which compressed air is stored to apply a predetermined air pressure to the piston 310 in the pneumatic cylinder.

And a displacement measuring unit 800 provided at an upper portion of the container 100 and measuring a displacement of the pressure plate 200 when air pressure acts on the pressure plate 200 by the pneumatic cylinder 300 have.

The sample 10 may comprise a porous material, such as a fresh concrete or the like.

The container 100 is formed in a square shape as shown in FIGS. 1 and 2 or a cylindrical shape as shown in FIGS. 3 and 4 so as to be easily manufactured and easily cleaned, The upper portion may be opened to contain the sample 10, and a cover (not shown) for covering the upper portion may be provided.

The container 100 may be made of a material such as stainless steel having a rigidity of a predetermined size or more so as to withstand the pressure of the sample of the pressure plate 200.

The pressure plate 200 is easily moved along the vertical direction of the container 100 in the container 100 so that the vertical pressure can be uniformly applied to the sample in the container 100. [ It may have the same shape as the shape of the container 100 and may be formed to have a size slightly smaller than the inner surface or inner diameter of the container 100.

A connection rod 210 may be formed at the center of the upper end of the pressure plate 200 to connect the piston 310 to the pneumatic cylinder 300.

The pneumatic cylinder 300 is provided with a supply hole 301 for receiving compressed air from the pressure vessel 700 to the upper portion of the piston 310. The supply hole 301 is connected to the pressure vessel 700, And a connection pipe 710 for connection with the connection pipe 710.

The connection pipe 710 is connected to the pneumatic cylinder 300 through the pressure vessel 700 and controls the supply of compressed air to the pneumatic cylinder 300 from the pressure vessel 700, A pneumatic control valve 720 may be provided for measurement.

The pressure area of the piston 310 of the pneumatic cylinder 300 increases by at least three times the pressure applied to the piston 310 of the pneumatic cylinder 300 and is applied to the pressure plate 200, May be formed to be at least three times larger than the size of the area of the pressurized area of the ink cartridge 200.

The vertical pressure measuring unit 400 is installed on the bottom surface of the container 100 and measures a vertical pressure applied to the sample 10 in the vertical direction when the air pressure acts on the pressure plate 200. [ Measurement sensor 410 may be included.

The vertical pressure measuring sensor 410 may be installed at the center of the bottom surface of the container 100 to accurately measure the vertical pressure applied to the sample 10 in the vertical direction.

The vertical pressure measuring sensor 410 can measure at least 0 to 30 times (30 bar) or more of the atmospheric pressure under the hermetic pressure.

A filtration member 420 may be installed on the bottom surface of the container 100 to filter water exuding from the sample 10 when the pressure plate 200 is pressed. That is, the filtration member 420 may be positioned at the lower end of the sample 10 to filter the water exuding from the sample 10.

The filtration member 420 effectively filters the water exuding from the sample 10 when the pressure plate 200 is pressurized and allows the pressure plate 200 to pressurize the sample 10 easily. (porous stone), but is not limited thereto, and any material can be used as long as it can filter water.

The drainage rate of the filtration member 420 for measuring the drainage rate of the sample is larger than that of the sample.

The lateral pressure measuring unit 500 is installed on the side surface of the container 100 and measures the lateral pressure of the sample in a state in which the sample is vertically pressed by the pressing plate 200 in a vertical direction, And a side pressure measuring sensor 510 for measuring a side pressure to be measured.

The lateral pressure measuring sensor may be installed at a predetermined height from the bottom surface of the container 100.

The lateral pressure measuring sensor 510 can be inserted into the insertion groove 101 formed outwardly from the inner side of the container 100 so as not to interfere with receiving the vertical pressure in the vertical direction by the pressure plate have.

The insertion grooves 102, 103 and 104 are positioned at a predetermined height, for example, 10 cm, 20 cm, or 30 cm from the bottom surface of the container 100 according to the height of the sample 100 Lt; / RTI >

The water content measuring unit 600 includes a drain hole 610 formed on a bottom surface of the container 100 for discharging water from the container 100,

A discharge pipe 620 coupled to the discharge hole 610 for discharging the water discharged through the discharge hole 610 to the outside,

And a flow rate control valve 630 installed in the discharge pipe 620 and controlling the discharge of water from the discharge pipe 620 and measuring the amount of water discharged from the discharge pipe 620 and the drainage rate .

The displacement measuring unit 800 includes a displacement member 810 formed at the upper end of the piston rod 320 of the pneumatic cylinder 300 and moved integrally with the piston rod 320 when the pressure plate 200 is pressed, , And

And a displacement measurement sensor 820 provided on the pneumatic cylinder 300 and measuring the distance to the displacement member 810 when the pressure plate 200 is pressed.

The displacement measurement sensor 820 is mounted on a mounting member 830 disposed at a predetermined distance from the upper portion of the pneumatic cylinder 300,

The mounting member 830 may be coupled with a support member 840 supported at a predetermined angle with respect to the pneumatic cylinder 300 in a vertical direction.

A storage vessel 900 for storing water discharged through the discharge pipe 620 may be installed at a predetermined distance below the vessel 100.

Hereinafter, the operation of the concrete form side pressure gauge according to the first embodiment of the present invention will be described with reference to FIG.

First, as a sample (10) for measurement of lateral pressure in the vessel (100) of a concrete form side pressure gauge, a certain amount of uncured concrete containing a certain amount of water of a porous material is contained.

At this time, the pressure plate 200 does not yet pressurize the sample 10, that is, the pneumatic control valve 720 of the pressure vessel 700 is closed, And the displacement measurement sensor 820 always detects that the pressure plate 200 is not yet supplied to the sample (10) 10) is not pressed, the distance to the displacement measuring member 810 is measured (reference distance).

When the pneumatic control valve 720 is opened, compressed air of a predetermined size (for example, 3 bar) of the pressure vessel 700 is supplied into the pneumatic cylinder 300 through the connection pipe 710 do.

Compressed air is supplied to the pneumatic cylinder 300 through the connection pipe 710 and the pressure of the compressed air is applied to the piston 310. When pressure is applied to the piston 310, The piston 310 is moved to a vertical distance below the pneumatic cylinder 300 by a predetermined distance.

At this time, the displacement measurement sensor 820 measures the distance to the displacement member 810, and the difference between the measured distance and the reference distance becomes the compression (consolidation) length of the sample.

When the piston 310 is moved vertically downwardly of the pneumatic cylinder 300 by a predetermined distance, the pressure plate 200 is also separated from the container 100 by the connection rod 320 connected to the piston 310 And the pressure plate 200 contacts the surface of the sample 10 and presses the sample 10 to a vertical pressure of a predetermined magnitude below the vertical direction of the container 100. [ At this time, if the pressing area of the piston 310 is larger than the pressing area of the pressing plate 200 by, for example, three times, a pressure of about 9 bar is applied to the pressing plate 200, for example.

At this time, the vertical pressure applied to the sample 10 is measured by the vertical pressure measuring sensor 410.

The lateral pressure which is expanded in the lateral direction of the sample 10 (in the lateral direction of the container in FIG. 1) when the vertical pressure is applied to the sample 10 in the vertical direction is measured by the lateral pressure measurement sensor 510.

When the sample 10 is a general concrete, the side pressure applied in the lateral direction of the sample 10 under a constant vertical pressure is decreased with time. When the sample 10 is expanded concrete, The side pressure applied to the sample 10 in the lateral direction after the sample 200 is fixed at a predetermined position increases with time.

Further, as the vertical pressure applied to the sample 10 is gradually increased by using the pneumatic cylinder 300, the side pressure applied to the sample 10 is increased with time.

As the sample 10 is applied with the pressure by the pressure plate 200, the sample 10 is compressed and becomes compaction so that the water contained in the sample 10 exudes.

The water leaking from the sample 10 is filtered through the filtration member 420 and discharged through the discharge hole 610 of the container 100. At this time, if the flow rate control valve 630 installed in the discharge pipe 620 is opened, the flow rate control valve 630 measures the amount of water discharged to the outside through the discharge pipe 620 and the drainage rate.

By measuring the amount of water discharged through the discharge pipe 620 and the drainage rate, the drainage amount of the concrete can be measured.

The displacement measuring sensor measures the distance to the displacing member and the vertical pressure measuring sensor can measure the vertical pressure applied to the sample so that it is possible to determine how much the sample is compressed (pressed) according to the pressure of the pneumatic cylinder or the pressure plate The odeometric modulus can be measured.

In addition, since the piston 310 moves without leakage in the pneumatic cylinder 300, the piston pressure is inevitably lost due to internal friction, so that the vertical pressure applied to the actual sample is smaller than the piston pressure, The pressure difference between the piston 310 and the sample 10 can be corrected by comparing the difference between the pressure applied to the piston 310 of the piston 10 and the vertical pressure applied to the sample 10.

2 is a schematic partial schematic view of a concrete form side pressure gauge according to a second embodiment of the present invention.

Referring to FIG. 2, the concrete form side pressure gauge according to the second embodiment of the present invention is the same as that of the first embodiment except for the following points, and a detailed description thereof will be omitted.

The container 100 of the concrete form side pressure gauge according to the second embodiment of the present invention may be formed in a square shape.

The side pressure measuring sensors 520, 530 and 540 of the side pressure measuring unit 500 may be installed at a predetermined interval on at least one side of the container 100 or may be installed at a plurality of intervals.

The lateral pressure measurement sensors 520, 530, and 540 may be inserted into the insertion grooves 102, 103, and 104 formed at regular intervals or at an arbitrary interval on the inner surface of the container 100.

The insertion grooves 102, 103 and 104 may be positioned at a predetermined height, for example, 10 cm, 20 cm, 30 cm, or the like from the bottom surface of the container 100.

3 is a schematic partial perspective view of a concrete form side pressure gauge according to a third embodiment of the present invention.

Referring to FIG. 3, the concrete form side pressure gauge according to the forty third embodiment of the present invention is the same as that of the first embodiment except for the matters specifically described below, and thus a detailed description thereof will be omitted.

The container 100 of the concrete form side pressure gauge according to the third embodiment of the present invention may be formed in a cylindrical shape.

The lateral pressure measuring sensor 550 of the lateral pressure measuring unit 500 may be installed on the inner peripheral surface of the container 100.

The lateral pressure measuring sensor 550 may be installed at a predetermined height from the bottom surface of the container 100.

The lateral pressure measuring sensor 550 may be inserted into the insertion groove 105 formed to be recessed outward from the inner circumferential surface of the container 100 so that the sample is prevented from being vertically applied by the pressure plate .

The insertion groove 105 may be positioned at a predetermined height, for example, 10 cm, 20 cm, or 30 cm, from the bottom surface of the container 100 according to the height of the sample 100 .

4 is a schematic partial perspective view of a concrete form side pressure gauge according to a fourth embodiment of the present invention.

Referring to FIG. 4, the concrete form side pressure gauge according to the fourth embodiment of the present invention is the same as that of the third embodiment except for the following description, and thus a detailed description thereof will be omitted.

The side pressure measuring sensors 560, 570 and 580 of the side pressure measuring unit 500 are installed at an angle interval (180 degrees, 120 degrees, etc.) at two or three or more in the circumferential direction on the inner peripheral surface of the container 100 Or may be installed at any angular interval.

The lateral pressure measuring sensors 560, 570 and 580 are inserted into insertion grooves 106, 107, and 108 formed at an inner circumferential surface of the container 100 at a predetermined angular interval or at an arbitrary angular interval with respect to the center of the container .

The insertion grooves 106, 107, and 108 may be positioned at a predetermined height, for example, 10 cm, 20 cm, 30 cm, or the like from the bottom surface of the container 100.

100: vessel 200: pressure plate
300: Pneumatic cylinder 310: Piston
400: vertical pressure measuring unit 500: side pressure measuring unit
600: water content measuring unit 700: pressure vessel
800: displacement measuring unit 900: storage container

Claims (11)

A square shaped container for containing a concrete sample for measuring a concrete form lateral pressure inside,
A pressure plate provided on an upper portion of the sample contained in the container, for pressing the sample vertically downward of the container,
A pneumatic cylinder provided at an upper portion of the pressure plate for supplying air pressure to the pressure plate so that a constant vertical pressure is applied to the pressure plate,
A vertical pressure measuring unit provided at a lower portion of the vessel and measuring a vertical pressure applied to the sample in the vertical direction when air pressure acts on the pressure plate,
A side pressure measuring part for measuring a side pressure applied to the sample in a state where the sample is subjected to vertical pressure by the pressure plate,
A concrete form lateral pressure gauge. A cylindrical container for holding a concrete sample for measuring a concrete form lateral pressure inside,
A pressure plate provided on an upper portion of the sample contained in the container, for pressing the sample vertically downward of the container,
A pneumatic cylinder provided at an upper portion of the pressure plate for supplying air pressure to the pressure plate so that a constant vertical pressure is applied to the pressure plate,
A vertical pressure measuring unit provided at a lower portion of the vessel and measuring a vertical pressure applied to the sample in the vertical direction when air pressure acts on the pressure plate,
A side pressure measuring part for measuring a side pressure applied to the sample in a state where the sample is subjected to vertical pressure by the pressure plate,
A concrete form lateral pressure gauge. 3. The method according to claim 1 or 2,
Wherein the vertical pressure measuring unit includes a vertical pressure measuring sensor installed on a bottom surface of the container and measuring a vertical pressure applied to the sample in the vertical direction when air pressure is applied to the pressure plate. The method of claim 3,
Wherein the side pressure measuring unit is installed on a side surface of the container and is positioned at a predetermined height from a bottom surface of the container, and the sample is sidewaysly applied with a vertical pressure of a predetermined magnitude A lateral pressure measuring sensor for measuring a lateral pressure of the concrete form. 5. The method of claim 4,
Wherein the lateral pressure measuring sensor is inserted into an insertion recess formed outwardly from an inner side surface of the container. 5. The method of claim 4,
Wherein the lateral pressure measuring sensors are installed at a predetermined interval on the one side of the container or a plurality of the lateral pressure measuring sensors are installed at arbitrary intervals. The method according to claim 6,
Wherein the lateral pressure measuring sensor is inserted into an insertion groove formed at an interval or at an arbitrary interval on the inner surface of the container. The method of claim 3,
Wherein the lateral pressure measuring unit is disposed on an inner circumferential surface of the container and is positioned at a predetermined height from a bottom surface of the container, and the sample is horizontally applied to the sample in a state of receiving a vertical pressure of a predetermined magnitude in the vertical direction A lateral pressure measuring sensor for measuring a lateral pressure of the concrete form. 9. The method of claim 8,
Wherein the lateral pressure measuring sensor is inserted into an insertion recess formed outwardly from the inner circumferential surface of the container. 9. The method of claim 8,
The lateral pressure measuring sensor is installed at an angular interval of 2 or 3 or more at circumferential direction on the inner circumferential surface of the container, or installed at an arbitrary angular interval. 11. The method of claim 10,
Wherein the lateral pressure measuring sensor is installed in an inner circumferential surface of the container in an insertion groove formed at a predetermined angular interval or an arbitrary angular interval with reference to the center of the container.
KR1020140050139A 2014-04-25 2014-04-25 CONCRETE MOULD lateral pressure MEASURING DEVICE KR20150123584A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114486002A (en) * 2022-01-29 2022-05-13 浙江交工金筑交通建设有限公司 Method for measuring acting force of anchoring body and anchor rod hole wall
US11402287B2 (en) 2019-09-10 2022-08-02 Structural Group, Inc. Mechanical formwork pressure sensor for in-situ measurement of fluid pressure during concrete matertal placement and method of using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11402287B2 (en) 2019-09-10 2022-08-02 Structural Group, Inc. Mechanical formwork pressure sensor for in-situ measurement of fluid pressure during concrete matertal placement and method of using the same
CN114486002A (en) * 2022-01-29 2022-05-13 浙江交工金筑交通建设有限公司 Method for measuring acting force of anchoring body and anchor rod hole wall

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