CN212358400U - Experimental device for saturated sandy soil stratum vibration grouting simulation - Google Patents
Experimental device for saturated sandy soil stratum vibration grouting simulation Download PDFInfo
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- CN212358400U CN212358400U CN202020693605.4U CN202020693605U CN212358400U CN 212358400 U CN212358400 U CN 212358400U CN 202020693605 U CN202020693605 U CN 202020693605U CN 212358400 U CN212358400 U CN 212358400U
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Abstract
The utility model discloses an experimental apparatus is used in saturated sand stratum vibration slip casting simulation, including receiving notes body container, vibration slip casting subassembly, water injection subassembly and monitoring devices, vibration slip casting subassembly and water injection subassembly are linked together with receiving notes body container respectively to slip casting and water injection in receiving notes body container respectively, monitoring devices is used for monitoring the experimental data who receives notes body container, and the vibration slip casting subassembly includes driving piece with adjustable vibration frequency, and the driving piece is used for driving the slip casting in to receiving notes body container. The utility model discloses an experimental apparatus for saturated sandy soil stratum vibration slip casting simulation has advantages such as simple and practical, easy dismounting, measuring operation are easy, the test result is accurate reliable and application scope is wide.
Description
Technical Field
The utility model relates to a slip casting experimental apparatus field especially relates to an experimental apparatus is used in saturated sandy soil stratum vibration slip casting simulation.
Background
Under the flood action of high water level and high flow speed, the saturated sandy soil strata of the river dike and the river dike are easy to form a 'piping' channel, thereby causing the breakwater and causing great loss to the life and property of people. The reason for piping generation of the levee is analyzed, mainly that the saturated sandy soil stratum of the levee is not reinforced or the treatment effect is poor, so that the permeability of the levee foundation is large, and in order to avoid piping accidents, anti-seepage reinforcement treatment must be carried out on the levee foundation. And the saturated sandy soil stratum is mainly treated by a grouting method, and due to the low porosity of the saturated sandy soil stratum, grout is difficult to inject, and the expected effect is difficult to achieve by adopting the traditional grouting process. In this way, the study of the scholars proposes 'saturated sandy soil embankment base low-pressure resonance grouting'. The method is characterized in that the vibration frequency on a vibration machine is adjusted to be consistent with the liquefaction vibration frequency of saturated sandy soil, so that the pore water pressure of the sandy soil is increased, the effective stress is reduced, the shear strength is reduced, a small-range liquefaction area or softening area is formed around a grouting hole, low-pressure grouting is performed, and the grout is easily injected into the saturated sandy soil at the moment, so that the aims of reducing permeability and preventing piping are fulfilled. However, in the actual construction process, it is found that a good grouting effect can be obtained only under reasonable grouting construction parameters, and how to obtain the grouting construction parameters is still an unsolved problem.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a simple and practical, easy dismounting, measuring operation is easy, the test result is accurate reliable and application scope is wide for saturated sandy soil stratum vibration slip casting simulation experimental apparatus.
In order to solve the technical problem, the utility model provides a technical scheme does:
the utility model provides an experimental apparatus for saturated sand stratum vibration slip casting simulation, includes and receives notes body container, vibration slip casting subassembly, water injection subassembly and monitoring devices, vibration slip casting subassembly and water injection subassembly are linked together with receiving notes body container respectively to slip casting and water injection in receiving notes body container respectively, monitoring devices are used for monitoring the experimental data of receiving notes body container, the vibration slip casting subassembly includes driving piece with adjustable vibration frequency, and the driving piece is used for driving the slip casting in receiving notes body container.
As a further improvement of the above technical solution:
the vibration grouting assembly further comprises a grouting pipe, a grouting piston and a slurry storage box, a piston cylinder of the grouting piston is communicated with an outlet of the slurry storage box, a piston rod is connected with a driving end of a driving piece, one end of the grouting pipe is communicated with an outlet of the grouting piston through a hose, and the other end of the grouting pipe penetrates into a container of a body to be injected.
And a one-way valve pointing to the grouting piston is arranged at the outlet of the grout storage box.
And a sealing device is arranged on the wall surface of the injected body container at the penetration position of the grouting pipe.
The slip casting pipe penetrates into the pipe body in the injected body container and is provided with a plurality of slip casting ports which are uniformly distributed, and each slip casting port is sleeved with a rubber ring.
The water injection assembly comprises a water pump and a water injection pipe, and two ends of the water injection pipe are respectively communicated with the water pump and the injected body container.
The position where the water injection pipe is communicated with the injected body container is positioned at the bottom of the injected body container.
The monitoring device comprises a water pressure monitoring meter, and the water pressure monitoring meter is used for monitoring the water pressure in the container of the injected body.
The body container is wholly sealed except for each communicating port, and the water pressure monitoring meter is arranged at the top of the body container.
The monitoring device comprises a grouting pressure monitoring meter, and the grouting pressure monitoring meter is arranged at the interface of the vibration grouting component and the injected body container and is used for monitoring the grouting pressure of the vibration grouting component.
Compared with the prior art, the utility model has the advantages of:
the utility model provides an experimental device for saturated sandy soil stratum vibration slip casting simulation, including receiving notes body container for the holding saturated sandy soil provides the required space of experiment. The device comprises a vibration grouting assembly, a water injection assembly and a monitoring device, wherein the vibration grouting assembly and the water injection assembly are respectively communicated with a container of a body to be injected so as to respectively inject grout and water into the container of the body to be injected, and the water is injected so that saturated sandy soil reaches a set water pressure so as to simulate the state of the saturated sandy soil of a river bank or a river bank under different water pressures; monitoring devices is used for monitoring the experimental data of the body container of receiving notes, and vibration slip casting subassembly includes driving piece that vibration frequency is adjustable, and the driving piece is used for driving the slip casting in to receiving notes body container.
When the experimental device of the utility model is used for experiment, an operator sets water pressure, grouting pressure, driving piece vibration frequency and the like according to the set conditions to be tested, and performs grouting experiment under the set conditions, and the monitoring device is used for monitoring the experimental conditions in the process, and then the grouting result is obtained; after a plurality of groups of experiments are carried out, appropriate set conditions, namely grouting construction parameters, can be selected according to the expected grouting effect. The utility model discloses can simulate the effect of vibration slip casting under different vibration frequency, water injection slip casting pressure, provide one kind can be fast convenient obtain slip casting effect and slip casting construction parameter relation experimental apparatus, can also be convenient provide invariable water pressure through the water injection subassembly and carry out the experiment such as post-injection structure anti-infiltration deformability, richened the implementation mode of slip casting experiment, can further master the method that improves the intensity and the impervious performance in saturated sandy soil stratum through the experiment; the experimental device is simple in structure, small in occupied space, convenient to assemble and disassemble among all parts, capable of performing simulation experiments indoors, simple and easy to operate, low in manufacturing and maintaining cost and wide in application range.
Drawings
Fig. 1 is the utility model discloses a saturated sandy soil stratum vibrates slip casting experimental apparatus for simulation's structural schematic.
Illustration of the drawings: 1. a recipient container; 2. vibrating the grouting component; 21. a drive member; 22. a grouting pipe; 221. a rubber ring; 23. a grouting piston; 24. a slurry storage tank; 3. a water injection assembly; 31. a water pump; 32. a water injection pipe; 4. a monitoring device; 41. a water pressure monitoring meter; 42. grouting pressure monitoring meter.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the following specific embodiments.
Example (b):
as shown in fig. 1, the experimental apparatus for simulating saturated sandy soil stratum vibration grouting of the embodiment includes an injected body container 1 for accommodating saturated sandy soil and providing a space required by an experiment. The device comprises a vibration grouting assembly 2, a water injection assembly 3 and a monitoring device 4, wherein the vibration grouting assembly 2 and the water injection assembly 3 are respectively communicated with a container 1 of a body to be injected so as to respectively inject slurry and water into the container 1 of the body to be injected, and the water is injected so that the saturated sandy soil reaches a set water pressure so as to simulate the saturated sandy soil state of a river bank or a river bank under different water pressure conditions; the monitoring device 4 is used for monitoring the experimental data of the injected body container 1, the vibration grouting component 2 comprises a driving part 21 with adjustable vibration frequency, and the driving part 21 is used for driving grouting into the injected body container 1.
When the experimental device is used for carrying out experiments, an operator sets water pressure, grouting pressure, vibration frequency of the driving piece 21 and the like according to set conditions to be tested, grouting experiments are carried out under the set conditions, the experimental conditions are monitored by the monitoring device 4 in the process, and then grouting results are obtained; after a plurality of groups of experiments are carried out, appropriate set conditions, namely grouting construction parameters, can be selected according to the expected grouting effect. The experimental device can simulate the effect of vibration grouting under different vibration frequencies and water injection grouting pressures, provides an experimental device which can quickly and conveniently obtain the relation between the grouting effect and grouting construction parameters, can also conveniently provide constant water pressure through the water injection assembly 3 to carry out experiments such as the anti-seepage deformation capability of the structure after grouting, enriches the implementation modes of the grouting experiment, and can further master the method for improving the strength and the impermeability of a saturated sandy soil stratum through the experiments; the experimental device is simple in structure, small in occupied space, convenient to assemble and disassemble among all parts, capable of performing simulation experiments indoors, simple and easy to operate, low in manufacturing and maintaining cost and wide in application range. In this embodiment, the driving member 21 is an electric push rod, the vibration frequency and the thrust of the electric push rod are adjustable within a certain range, and in other embodiments, other devices may be selected as the driving member 21.
In this embodiment, the vibration grouting assembly 2 further includes a grouting pipe 22, a grouting piston 23 and a slurry storage tank 24, a piston cylinder of the grouting piston 23 is communicated with an outlet of the slurry storage tank 24, a piston rod is connected with a driving end of the driving member 21, one end of the grouting pipe 22 is communicated with the outlet of the grouting piston 23 through a hose, and the other end of the grouting pipe penetrates into the injected body container 1. In the present embodiment, the frequency of the grouting piston 23 is changed by driving the driver 21. The slip casting is separated with the container that stores up the thick liquid to this embodiment, and the two can not produce mutual interference, consequently makes things convenient for pouring and injection of thick liquid more, guarantees the continuity of slip casting process. In this embodiment, the slurry storage box 24 is an aluminum funnel-shaped structure, the diameter of the outlet aperture is 3-5 cm, and other materials and specifications can be adopted in other embodiments, which are not described herein.
In the embodiment, the outlet of the slurry storage box 24 is provided with a check valve pointing to the interior of the piston cylinder of the grouting piston 23, so that the situation that the pressure in the piston cylinder of the grouting piston 23 is increased in the grouting process to cause slurry to reversely flow back into the slurry storage box 24 is prevented, the injected slurry is ensured to completely enter the container 1 of the injected body after the grouting piston 23 is driven, and the grouting effect and the grouting efficiency are ensured; when the piston rod is retracted, negative pressure is generated in the piston cylinder of the grouting piston 23, the check valve is opened, so that the grout can smoothly enter the piston cylinder, and then grouting is performed again.
In this embodiment, a sealing device is disposed on the wall surface of the container 1 where the grouting pipe 22 penetrates, so that the internal environment of the container 1 is always kept under a set condition, and the experimental data is ensured to be real and effective.
In this embodiment, a plurality of grouting ports are uniformly distributed on the pipe body of the grouting pipe 22 penetrating into the container 1, each grouting port is provided with a rubber ring 221 along the circumferential sleeve of the grouting pipe 22, and the rubber ring 221 has elasticity, so that in the grouting process, grout gushed from the grouting ports pushes the rubber ring 221 away to enter the container 1, and in the non-grouting process, the rubber ring 221 retracts to close the grouting ports, thereby effectively preventing sand or water in the container 1 from entering the grouting ports to block and the like. Furthermore, a protrusion corresponding to the position and size of the injection port may be further disposed on the inner wall of the rubber ring 221, so as to provide a better sealing effect.
In this embodiment, the water injection assembly 3 includes a water pump 31 and a water injection pipe 32, both ends of the water injection pipe 32 are respectively communicated with the water pump 31 and the injected body container 1, and the water pump 31 is a small-sized constant pressure water pump 31 for introducing water into the injected body container 1 through the water injection pipe 32 to provide power required for water injection. The water injection pipe 32 is located at the center of the bottom wall of the subject container 1 at the communication position with the subject container 1, and the aperture is 1cm to 1.5 cm. The position of setting up of water injection pipe 32 is favorable to water to fill totally and is annotated body container 1, prevents from last to fill with to looking like that the water injection leads to down, and the actual bottom sand soil does not soak the circumstances such as.
In the embodiment, the injected body container 1 is formed by fastening a cylindrical side wall, a top wall and a bottom wall through bolts, each wall is an organic glass plate with the thickness of 0.8 cm-1 cm, and the whole body is closed except for each communicating port, the monitoring device 4 comprises a water pressure monitoring meter 41 with the measuring range of 1.5Mpa, and the water pressure monitoring meter is arranged at the edge of the top wall of the injected body container 1 and is used for monitoring the water pressure in the injected body container 1; when water is injected from the bottom wall of the container 1 to the top wall, the water pressure monitoring meter 41 starts to display the reading, and when the reading reaches the target reading, the water pressure in the container 1 reaches the requirement.
In this embodiment, monitoring devices 4 includes slip casting pressure monitoring table 42, and slip casting pressure monitoring table 42 sets up in the kneck of vibration slip casting subassembly 2 and injected body container 1 for the slip casting pressure of monitoring vibration slip casting subassembly 2.
After the experimental device is installed, the container 1 of the injected body is filled with saturated sandy soil, then the water pump 31 is started, water is injected through the water injection pipe 32 until the water pressure monitoring meter 41 shows 1.2Mpa, and water injection is stopped. Pouring the prepared slurry into a slurry storage box 24, opening a driving part 21, monitoring the grouting process through a grouting pressure monitoring meter 42, injecting for 5min after the grouting pressure reaches the end standard, closing the driving part 21, and recording related parameters; after the grout is solidified for a period of time, the container 1 of the injected body is disassembled, the soil body is excavated, the properties of the injected stones are observed, and the diffusion distance of the grout is measured. The relevant parameters measured in this experiment are shown in table 1:
table 1: the relevant parameters measured in this example
| Related parameter | Measured value |
| Water-to-solid ratio | 1：1 |
| Maximum grouting pressure | 0.4MPa |
| Frequency of vibration | 6 times/min |
| Radius of diffusion | 10cm |
It can be shown that under the above experimental conditions, the grouting effect is 10cm in diffusion radius.
The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, the modifications and changes obtained without departing from the technical idea of the present invention should be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an experimental apparatus for saturated sandy soil stratum vibration slip casting simulation which characterized in that: including receiving notes body container (1), vibration slip casting subassembly (2), water injection subassembly (3) and monitoring devices (4), vibration slip casting subassembly (2) and water injection subassembly (3) are linked together with receiving notes body container (1) respectively to slip casting and water injection in receiving notes body container (1) respectively, monitoring devices (4) are used for monitoring the experimental data that receives notes body container (1), vibration slip casting subassembly (2) are including driving piece (21) that vibration frequency is adjustable, and driving piece (21) are used for driving and are received notes liquid in notes body container (1).
2. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 1, characterized in that: the vibration grouting assembly (2) further comprises a grouting pipe (22), a grouting piston (23) and a slurry storage box (24), a piston cylinder of the grouting piston (23) is communicated with an outlet of the slurry storage box (24), a piston rod is connected with a driving end of the driving piece (21), one end of the grouting pipe (22) is communicated with an outlet of the grouting piston (23) through a hose, and the other end of the grouting pipe penetrates into the injected body container (1).
3. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 2, characterized in that: and a one-way valve pointing to the interior of a piston cylinder of the grouting piston (23) is arranged at an outlet of the grout storage box (24).
4. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 2, characterized in that: the wall surface of the injected body container (1) is provided with a sealing device at the penetrating part of the grouting pipe (22).
5. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 2, characterized in that: the grouting pipe (22) penetrates into the pipe body in the injected body container (1) and is provided with a plurality of grouting ports which are uniformly distributed, and each grouting port is sleeved with a rubber ring (221).
6. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 1, characterized in that: the water injection assembly (3) comprises a water pump (31) and a water injection pipe (32), and the two ends of the water injection pipe (32) are respectively communicated with the water pump (31) and the injected body container (1).
7. The experimental device for saturated sandy soil stratum vibration grouting simulation of claim 6, wherein: the position of the water injection pipe (32) communicated with the injected body container (1) is positioned at the bottom of the injected body container (1).
8. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 1, characterized in that: the monitoring device (4) comprises a water pressure monitoring meter (41), and the water pressure monitoring meter (41) is used for monitoring the water pressure in the injected body container (1).
9. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 8, characterized in that: the injected body container (1) is integrally sealed except for the communicating ports, and the water pressure monitoring meter (41) is arranged at the top of the injected body container (1).
10. The saturated sandy soil stratum vibration grouting simulation experiment device according to claim 1, characterized in that: monitoring devices (4) are including slip casting pressure monitoring table (42), slip casting pressure monitoring table (42) set up in the kneck of vibration slip casting subassembly (2) and injected body container (1) for the slip casting pressure of monitoring vibration slip casting subassembly (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020693605.4U CN212358400U (en) | 2020-04-29 | 2020-04-29 | Experimental device for saturated sandy soil stratum vibration grouting simulation |
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| CN202020693605.4U CN212358400U (en) | 2020-04-29 | 2020-04-29 | Experimental device for saturated sandy soil stratum vibration grouting simulation |
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| CN202020693605.4U Active CN212358400U (en) | 2020-04-29 | 2020-04-29 | Experimental device for saturated sandy soil stratum vibration grouting simulation |
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