CN217466607U - Visual laboratory simulation slip casting device - Google Patents

Abstract

The utility model discloses a visual laboratory simulation grouting device, which comprises an air source pressurizing device, a grouting penetration device and a data acquisition system; the slurry storage barrel and the grouting pipe are made of transparent materials; the data acquisition system comprises two pore water pressure sensors which are respectively and electrically connected with the data processing system, and the installation positions of the pore water pressure sensors are respectively positioned at the inlet and the outlet of the grouting pipe. The grouting penetration process is completely visualized, and the defect that the actual grouting process is hidden and difficult to observe is effectively overcome; the grouting stirring device can avoid the phenomena of slurry bleeding and precipitation during grouting; the influence of the time-varying characteristic of the slurry on the grouting diffusion rule is convenient to study; the influence of the permeation clogging effect on the grouting diffusion rule is reflected by the change of the permeability coefficient of the fresh concrete, and the research of the grouting diffusion theory is promoted; detachable design can take out the concrete test block and carry out porosity and durability evaluation after the slip casting penetration test of being convenient for accomplishes in this application.

Description

Visual laboratory simulation slip casting device

Technical Field

The utility model relates to a concrete grouting engineering field especially relates to a visual laboratory simulation slip casting device.

Background

The upstream face, the periphery of the template, the bank slope, the gallery and other parts of the roller compacted concrete dam cannot be subjected to conventional roller compacted concrete construction, a metamorphosis concrete layer is formed after grout is usually added on site, and the seepage-proofing performance of the roller compacted concrete dam is improved through compaction. Wherein artifical jack slip casting is one of the main mode of current metamorphosis concrete grout adding operation, but current slip casting technique has the following problem:

1. the current specifications of the technological parameters (such as grouting pressure, grouting pipe distribution, grouting time and the like) of grouting construction are not clearly specified, the operation experience of field workers is mainly relied on, the randomness and the uncertainty are high, and the construction quality is difficult to ensure. The main reason is that the grouting theory research is incomplete, and the variables such as grouting pressure, grouting diffusion radius, grouting time and the like cannot be reasonably regulated and controlled. Although a device for simulating a grouting process appears in recent years, for example, a device and a method for continuously simulating indoor grouting under stable pressure disclosed in chinese patent CN106706845A, grouting simulation is realized by adding and pressurizing slurry to a grouting module through a slurry storage module, but the method cannot realize real-time regulation and control of grouting pressure in combination with an actual grouting process. Meanwhile, a slurry storage system of the method is lack of a slurry stirring device, and slurry bleeding and precipitation phenomena can occur along with the extension of the grouting time, and even a grouting pipe can be blocked.

2. Due to the concealment of grouting engineering, researches for simulating the diffusion radius and the diffusion form of grouting are mostly carried out on site, and the excavation coring form is adopted for verification, so that not only is more manpower and material resource investment needed, but also the hysteresis exists in the core sample drilling mode after concrete is hardened, and the grouting effect cannot be observed visually in real time.

3. In the grouting diffusion process, the permeability of concrete is one of the key properties for determining the grouting effect. In the large-scale engineering metamorphosis concrete grouting process, the cement grout is required to completely fill the pores of the concrete so as to ensure the construction quality, so that the permeability of a grouting sample is required to be measured in real time, and no such realization device is available at present.

In summary, in order to perfect the research of the distorted concrete grouting diffusion theory, a device and a method for visually simulating the real grouting process in a laboratory environment are needed, and the device and the method have the functions of observing the grouting permeation process in real time and recording basic parameters such as grouting pressure, grouting amount and diffusion distance. Meanwhile, the permeability of the outlet section can be measured in real time, and the purpose of ensuring the grouting effect is achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a visual laboratory simulation slip casting device solves thereby how to effectively survey actual slip casting infiltration process and obtains slip casting diffusion law, can also the problem that the real-time measurement slip casting in-process export section osmotic coefficient changes.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a visual laboratory simulation grouting device, which comprises an air source pressurizing device, a grouting penetration device and a data acquisition system;

the air source pressurizing device comprises an air compressor, a high-pressure oil pipe and a pressure regulating valve, wherein the high-pressure oil pipe is used for communicating the air compressor with the grouting penetration device, and the pressure regulating valve is arranged on the high-pressure oil pipe;

the grouting penetration device comprises a grout storage barrel, grout stirring equipment arranged in the grout storage barrel, a grouting pipe communicated with the grout storage barrel, and a grout outlet communicated with the other end of the grouting pipe;

the slurry storage barrel is detachably communicated with the high-pressure oil pipe through a flange pipe, and a ball valve is arranged at one end of the high-pressure oil pipe communicated with the flange pipe;

a butterfly valve is arranged between the slurry storage barrel and the grouting pipe; both ends of the grouting pipe are provided with a silica gel gasket and a filter screen through bolts;

the slurry storage barrel and the grouting pipe are made of transparent materials;

the data acquisition system comprises two pore water pressure sensors which are respectively and electrically connected with the data processing system, and the installation positions of the two pore water pressure sensors are respectively positioned at the inlet and the outlet of the grouting pipe.

In this embodiment, further optimize, be provided with control panel and manometer on the air compressor machine.

In this embodiment, it is still further optimized that the slurry stirring device is provided with a stirring blade inside the slurry storage barrel and a motor outside the slurry storage barrel for driving the stirring blade.

In this embodiment, further optimize again, store up thick liquid section of thick bamboo with the slip casting pipe is organic glass material.

In this embodiment, it is further optimized that a graduated scale is arranged in the flange pipe of the slurry storage cylinder.

In this embodiment, further optimize again, the ball valve passes through bolt and silica gel gasket with store up the flange pipe top intercommunication of thick liquid section of thick bamboo.

In this embodiment, it is further optimized that the grout outlet at one end of the grouting pipe is provided with a support frame and an electronic balance.

Compared with the prior art, the utility model discloses a beneficial technological effect:

1) the grouting pipe is made of transparent organic glass materials, so that the grouting penetration process is completely visualized; and the grouting pressure is adjusted in real time through a pressure regulating valve and a pressure sensor, so that the grouting diffusion law under different grouting pressure conditions can be researched, and the defect that the actual grouting process is hidden and difficult to observe is effectively overcome.

2) The grouting stirring device continuously stirs the grout in the grout storage barrel, so that the phenomena of grout bleeding and sedimentation caused by the extension of grouting time are avoided; the influence of the time-varying characteristic of the slurry on the grouting diffusion rule can be further conveniently and effectively researched, and the method is closer to the actual engineering field.

3) The permeability coefficient of the fresh concrete can be directly solved through the grouting amount, the grout outlet amount and the grouting pressure parameter obtained through tests, the influence of the permeation clogging effect on the grouting diffusion rule is reflected through the change of the permeability coefficient, and then the research of the grouting diffusion theory is promoted.

4) Because this application device design is detachable construction for can take out the concrete test block and carry out porosity and durability evaluation after the slip casting penetration test is accomplished, solve the problem of engineering site infiltration coring difficulty effectively, also reduced actual engineering site conditions conveniently.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

Fig. 1 is a schematic view of the installation of the visual laboratory simulation grouting device of the present invention;

fig. 2 is the utility model discloses the schematic diagram of filter screen and silica gel gasket equipment among the visual laboratory simulation slip casting device.

Description of reference numerals:

1-an air compressor; 2-a control panel; 3-high pressure oil pipe; 4-pressure regulating valve; 5-a ball valve; 6-bolt; 7-a silica gel gasket; 8-a graduated scale; 9-an electric motor; 10-stirring blade; 11-a pulp storage cylinder; 12-pore water pressure sensor; 13-a data processing system; 14-a butterfly valve; 15-filtering with a filter screen; 16-grouting pipes; 17-a pulp outlet; 18-silica gel; 19-a support frame; 20-electronic balance.

Detailed Description

Example 1

The embodiment discloses a visual laboratory simulation grouting device, which can be mainly divided into an air source pressurizing device, a grouting penetration device (grouting system) and a data acquisition system as shown in the attached drawing 1;

the air compressor 1 is connected with a pressure regulating valve 4 through a first high-pressure oil pipe 3 to control air inlet pressure, then is connected with an air inlet ball valve 5 of a grouting system through a second high-pressure oil pipe 3, and a slurry storage cylinder 11 is externally provided with a motor 9 to control stirring blades 10 to stir slurry, so that the phenomena of precipitation and bleeding along with the extension of grouting time are prevented;

before the grouting test is started, vaseline needs to be coated in the grouting pipe 16 and the grout outlet 17, and then fresh concrete needs to be filled in the vaseline. The first pore water pressure sensor 12 of the grout inlet can be matched with the pressure regulating valve 4 to feed and control the grouting pressure in real time, when the preset pressure of the test is reached, the butterfly valve 15 is opened to start the permeation grouting process, and because the grouting pipes are made of transparent organic glass, the grouting permeation process can be visually observed.

Wherein, the slip casting volume is shown by the liquid level decline height on the scale 8, under the effect of default pressure, and after the thick liquid diffusion scope reached the maximum, close butterfly valve 15 and come the end slip casting process. And taking out the concrete in the grouting pipe after curing for 24h, and evaluating the grouting permeation effect through durability tests such as SEM electron microscope scanning, compression test, permeability resistance test and the like.

The air compressor 1 is connected with a pressure regulating valve 3 through a first high-pressure oil pipe 2, and the pressure regulating valve 3 is not only an air pressure source of a grouting system, but also an air leakage channel. The gas pressure can be released by enlarging the gas release valve, and the test safety is fully ensured. The test device is connected with the silica gel gasket 7 through the bolt 6, so that the test device is convenient to disassemble and clean and can be reused.

Example 2

In this embodiment, as shown in fig. 1, the visual grouting penetration simulation device can simulate a penetration grouting process and solve a grouting diffusion rule under different grouting pressures, and can also be used for solving a change rule of an outlet section concrete permeability coefficient along with grouting time, so as to indirectly reflect the influence of a penetration clogging effect on the grouting diffusion process.

The connection of the air source pressurizing device and the grouting system is the same as that in embodiment 1, and grouting pipelines 16 with different lengths can be manufactured in the test to analyze the real-time permeability coefficients of different grouting ranges. After vaseline is coated in the grouting pipe 16 and the grout outlet 17, newly mixed concrete is filled, then the butterfly valve 14 is opened, grout starts to penetrate through the first filter screen 15 in the grouting process, when the grout reaches the outlet section and enters the grout outlet 17 through the second filter screen 15, the change of the mass of the concrete in the grout outlet 17 is recorded by the electronic balance 20. Because the vaseline is coated, the mass of the concrete in the grout outlet 17 is supported on the electronic balance 20 through the support frame 19, so that the grout outlet amount can be reflected by the reading change on the electronic balance 20; the pulp feed amount can be represented by the change in the liquid level of the scale 8. The permeability coefficient of the slurry can be solved by the following formula:

in the formula, Q is the section flow; k is the permeability coefficient; a is the area of the cross section; Δ p is the pressure difference of the inlet and outlet sections; delta l is the water level distance of the inlet and outlet sections; h is the water head height of the slurry section; eta is viscosity.

The change rule of the permeability coefficient along with time can reflect the filling effect of concrete pores, and indirectly reflects the influence of the silting effect of the grout along with the change of time on the grouting diffusion rule. The other structures in embodiment 2 are the same as those in embodiment 1.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims (7)

1. The utility model provides a visual laboratory simulation slip casting device which characterized in that: the grouting device comprises an air source pressurizing device, a grouting penetration device and a data acquisition system;

the air source pressurizing device comprises an air compressor (1), a high-pressure oil pipe (3) for communicating the air compressor (1) with the grouting penetration device, and a pressure regulating valve (4) arranged on the high-pressure oil pipe (3);

the grouting penetration device comprises a grout storage barrel (11), grout stirring equipment arranged in the grout storage barrel (11), a grouting pipe (16) communicated with the grout storage barrel (11), and a grout outlet (17) communicated with the other end of the grouting pipe (16);

the slurry storage barrel (11) is detachably communicated with the high-pressure oil pipe (3) through a flange pipe, and a ball valve (5) is mounted at one end of the high-pressure oil pipe (3) communicated with the flange pipe;

a butterfly valve (14) is arranged between the slurry storage barrel (11) and the grouting pipe (16); both ends of the grouting pipe (16) are provided with a silica gel gasket (7) and a filter screen (15) through bolts (6);

the slurry storage barrel (11) and the grouting pipe (16) are both made of transparent materials;

the data acquisition system comprises two pore water pressure sensors (12) which are respectively electrically connected with the data processing system (13), and the installation positions of the two pore water pressure sensors (12) are respectively positioned at the inlet and outlet positions of the grouting pipe (16).

2. The visual laboratory simulation grouting device of claim 1, wherein: the air compressor (1) is provided with a control panel (2) and a pressure gauge.

3. The visual laboratory simulation grouting device of claim 1, wherein: the slurry stirring equipment is provided with a stirring blade (10) positioned in the slurry storage barrel (11) and a motor (9) which is positioned outside the slurry storage barrel (11) and is used for driving the stirring blade (10).

4. The visual laboratory simulation grouting device of claim 1, wherein: the grout storage barrel (11) and the grouting pipe (16) are made of organic glass materials.

5. The visual laboratory simulation grouting device of claim 1, wherein: and a graduated scale (8) is arranged in the flange pipe of the pulp storage barrel (11).

6. The visual laboratory simulation grouting device of claim 1, wherein: the ball valve (5) is communicated with the top end of the flange pipe of the pulp storage barrel (11) through a bolt (6) and a silica gel gasket (7).

7. The visual laboratory simulation grouting device of claim 1, wherein: a support frame (19) and an electronic balance (20) are arranged at a grout outlet (17) at one end of the grouting pipe (16).

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