CN209741848U - device for uniformly grouting and reinforcing sandy soil through microbial radiation - Google Patents
device for uniformly grouting and reinforcing sandy soil through microbial radiation Download PDFInfo
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- CN209741848U CN209741848U CN201920063527.7U CN201920063527U CN209741848U CN 209741848 U CN209741848 U CN 209741848U CN 201920063527 U CN201920063527 U CN 201920063527U CN 209741848 U CN209741848 U CN 209741848U
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Abstract
The utility model provides a device of microorganism radiation even grout reinforcement sand, the device includes toper divides liquid lid, first sealing plug, drum, platform support frame, second sealing plug. The conical liquid separating cover comprises an upper conical container and a plurality of radiation needle tubes connected to the bottom of the upper conical container, a plurality of drill holes are formed in the first sealing plug, the plurality of radiation needle tubes penetrate through the first sealing plug through the drill holes to enter the cylinder, and the side wall of the radiation needle tube entering the cylinder is provided with a hole. The upper end and the lower end of the cylinder are respectively plugged into a first sealing plug and a second sealing plug; a liquid discharge pipe is arranged on the second sealing plug; the cylinder is fixedly arranged on the platform supporting frame. The utility model provides a device of sand is consolidated in even grout of microbial radiation to the even grout of sand sample total cross-section, the control of the total cross-section of grouting velocity. After the test is finished, the sampling is simple and easy to operate, and the disturbance to the sample is small.
Description
Technical Field
The utility model relates to a device of even grout reinforcement sand of microbial radiation relates to the microorganism grout and consolidates (MICP) field.
Background
In the last fifteen years, a method for reinforcing rock-soil mass by Microorganisms (MICP) is rapidly developed in China, a microorganism curing technology is one of the most innovative technical fields of the current geotechnical engineering, and the technology creatively utilizes abundant natural non-toxic microorganism resources to change the microstructure and the composition of the rock-soil, so that the engineering mechanical properties of the rock-soil mass, including strength, rigidity, permeability and the like, are improved. The principle of the technology is as follows: during the grouting process, the cell surface of the microorganism adsorbs Ca2+, urease is produced through self-metabolism, urea is hydrolyzed to generate NH4+ and CO32-, and CaCO3 crystals with gelling property are generated by taking the bacteria as nuclei to solidify the sandy soil. The microorganism reinforcing technology can be applied to the fields of rock and soil mass reinforcement, seepage prevention and leakage stoppage of dams and geotechnical structures, sandy soil liquefaction prevention and control, heavy metal polluted soil treatment, earth-stone brick cultural relic building restoration, concrete crack restoration, desert treatment and the like.
At present, a large number of sand grouting reinforcement indoor tests are carried out at home and abroad by utilizing a microorganism reinforcement technology (MICP), and the test grouting method mainly comprises a rigid mold low-water-pressure grouting method and a flexible mold soaking method. The flexible mold soaking method can only be carried out in a laboratory, is generally pressure-free grouting, and has no application condition in general practical engineering. The rigid mould low water pressure pouring method can well control the grouting speed, but the grouting area is concentrated on one point on the sandy soil sample, the improved nonuniformity of the strength, permeability and the like of the sandy soil sample is increased, CaCO3 generated by the reaction on the upper part of the sandy soil sample is precipitated to block a seepage channel, so that the grouting reinforcement effect on the middle part and the lower part of the sandy soil sample is poor, and meanwhile, the sampling operation is troublesome after the test is finished and certain disturbance is caused to the sample.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a device of little biological radiation evenly is in milk and is consolidated sand, to the even grout of the full cross-section of sand sample, the full cross-section control of the velocity of flow of grouting. After the test is finished, the sampling is simple and easy to operate, and the disturbance to the sample is small.
the utility model discloses the technical scheme who takes does:
A device for uniformly grouting and reinforcing sandy soil by microbial radiation comprises a conical liquid separating cover, a first sealing plug, a cylinder, a platform supporting frame and a second sealing plug.
The conical liquid separating cover comprises an upper conical container and a plurality of radiation needle tubes connected to the bottom of the upper conical container, a plurality of drill holes are formed in the first sealing plug, the plurality of radiation needle tubes penetrate through the first sealing plug through the drill holes to enter the cylinder, and an opening is formed in the side wall of the radiation needle tube entering the cylinder;
The upper end and the lower end of the cylinder are respectively plugged into a first sealing plug and a second sealing plug;
A liquid discharge pipe is arranged on the second sealing plug;
the cylinder is fixedly arranged on the platform supporting frame.
The top of the upper conical container is in threaded connection with a dropper.
The first sealing plug is a rubber plug and consists of an upper cylinder and a lower cylinder, and the lower cylinder is plugged into the cylinder.
The second sealing plug is the rubber buffer, comprises upper and lower two cylinders, and lower cylinder stopper advances the drum, goes up a capillary of cylinder insertion, and the capillary stretches into drum partly, is fixed with the rubber tube on the capillary that exposes the rubber buffer, and the rubber tube length sets up the stagnant water clamp.
the cylinder consists of two stainless steel semicircles. The closed parts of the two semi-circles of the two semi-stainless steel are welded with cylinder clamps which are connected by screws which are uniformly arranged up and down.
The platform support frame is welded with the cylinder; and a plurality of platform supporting foot frames are arranged at the intersection points of the platform supporting foot frames and the cylinder.
The utility model relates to a device of sand is consolidated in even grout of microbial radiation, the technological effect as follows:
1. The utility model discloses the device is totally enclosed system, can carry out pressure grouting, solves because of the influence that sample upper portion solution reaction produced CaCO3 crystallization shutoff seepage flow passageway.
2. The utility model discloses the grouting solution of device need reach 1 mm's liquid level earlier before the toper divides liquid lid to get into the drum, and 4 radiation syringe needle pipes of submergence guarantee the even grout of full-section.
3. The utility model discloses the device can full cross-section control grouting velocity of flow, and the velocity of flow is faster, and submergence radiation syringe needle pipe speed is faster, gets into the radiation syringe needle pipe lateral wall of drum sand sample and opens the aperture all around, guarantees the whole even pressure grout of sand sample
4. the utility model discloses the device sample is convenient, only need with the drum clamp on the nut twist off can, little to the sample disturbance.
5. The utility model discloses device platform support foot rest can reciprocate, and the toper divides liquid lid and rubber buffer coupling part to dismantle, can carry out positive and negative grout to test sample from this, gains better grout effect.
6. The utility model discloses the second sealing plug of device, the stagnant water clamp that the lower part set up can control the reaction time of grout solution in the drum, and can collect waste liquid and waste gas, and is more environmental protection.
drawings
FIG. 1 is a schematic diagram of the front structure of the device of the present invention;
FIG. 2 is a schematic side view of the device of the present invention;
FIG. 3 is a schematic top view of the apparatus of the present invention;
FIG. 4 is a schematic view of a conical liquid separating cover of the device of the present invention;
FIG. 5 is a layout of the drilling points of the radiation needles of the device of the present invention;
Fig. 6 is a schematic structural view of a first sealing plug of the device of the present invention;
Fig. 7 is a schematic structural view of a second sealing plug of the device of the present invention.
Detailed Description
As shown in fig. 1 to 7, a device for reinforcing sandy soil by microbial step grouting, a device for reinforcing sandy soil by microbial radiation uniform grouting, comprises a conical liquid dividing cover 1, a first sealing plug 2, a cylinder 3, a platform support frame 5 and a second sealing plug 6.
Except that the first sealing plug 2 and the second sealing plug 6 are made of rubber, other parts are made of stainless steel. The whole device is required to be completely sealed so as to facilitate the subsequent test of uniform pressure grouting.
the conical liquid separating cover 1 comprises an upper conical container 1.1 and 4 radiation needle tubes 1.2 connected to the bottom of the upper conical container 1.1. The top of the upper conical container 1.1 is in threaded connection with a dropper 1.3 and can be detached.
the first sealing plug 2 is provided with a plurality of drilling holes 2.1, a plurality of radiation needle tubes 1.2 penetrate through the first sealing plug 2 through the drilling holes 2.1 to enter the cylinder 3, and the side wall of the radiation needle tube entering the cylinder 3 is provided with an opening 1.4.
The upper end and the lower end of the cylinder 3 are respectively plugged into the first sealing plug 2 and the second sealing plug 6.
and a liquid discharge pipe is arranged on the second sealing plug 6.
The cylinder 3 is fixedly arranged on a platform support frame 5.
first sealing plug 2 is the rubber buffer, comprises upper and lower two cylinders, goes up cylinder diameter 60mm, and height 10mm, lower cylinder diameter 49mm, height 25 mm. The lower cylinder is plugged into the cylinder 3, and the upper cylinder is flush with the bottom of the conical liquid separation cover 1.
The total length of the radiation needle tube 1.2 is 91mm, and the radiation needle tube is welded with the conical liquid separating cover 1 at a specific point and extends into the conical liquid separating cover 1 mm.
The second sealing plug 6 is the rubber buffer, comprises upper and lower two cylinders, goes up cylinder diameter 60mm, and height 10mm, lower cylinder diameter 49mm, height 25 mm. The lower cylinder is plugged into the cylinder 3, a capillary tube 6.1 with the inner diameter of 2mm, the outer diameter of 4mm and the length of 60mm is inserted into the center of the upper cylinder, the capillary tube is inserted into the lower cylinder by 35mm, and the exposure is 25 mm. The capillary tube 6.1 extends into a part of the cylinder 3, a rubber tube 6.2 with the length of 200mm is fixed on the stainless steel capillary tube 6.1 with the rubber plug exposed, and a water stop clamp 6.3 is arranged on the rubber tube 6.2.
The cylinder 3 consists of two stainless steel semicircles. The cylinder clamp 3.1 is welded at the closed position of the two semi-circles of the two semi-stainless steel, and the cylinder clamp 3.1 is connected by 8 screw rods which are uniformly arranged from top to bottom to form a closed stainless steel cylinder.
the platform support frame 5 is welded with the cylinder 3; at the intersection point of 25mm parallel to the direction of the cylinder clamp 3.1 and 40mm perpendicular to the direction of the cylinder clamp 3.1, 4 supporting feet 5.1 are arranged. The supporting feet 5.1 are solid cylinders with the diameter of 6mm and the length of 100 mm. The supporting feet 5.1 can move up and down, and the fixed part is provided with threads and fixed by a matched and customized nut.
The principle of microbial radiation uniform grouting and sand reinforcement is as follows:
(1) The top of the dropper is designed with threaded connection so as to conveniently replace rubber head droppers with different diameters in experiments and control different grouting flow rates and speeds.
(2) When the radiation needle tube 1.2 is inserted into the conical liquid separating cover 1 for 1mm welding, the liquid level height of 1mm is required to be reached before the liquid enters the cylinder 3 from the conical liquid separating cover 1, and 4 radiation needle tubes 1.2 are immersed to ensure that the whole section is uniformly grouted.
(3) The elasticity of a rubber plug is utilized, a radiation needle tube 1.2 at the bottom of a conical liquid separating cover 1 is tightly plugged into a first sealing plug 2, and a cylinder closed environment is formed. The periphery of the side wall of the radiation needle tube 1.2 which enters the cylindrical sand sample is provided with openings 1.4, so that the whole sand sample is uniformly grouted under pressure.
(4) the method comprises adhering a silica gel sheet with thickness of 1mm on the inner wall of 3.1 of two cylindrical clamps by using elasticity of the silica gel sheet to form a stainless steel cylinder sealed environment.
(5) The function of moving up and down by using the supporting feet 5.1 of the platform supporting frame 5; and the detachability of the connecting part of the conical liquid separating cover 1 and the rubber plug can invert the cylinder 3 to carry out the positive and negative uniform grouting of microorganisms so as to obtain better grouting effect.
The method comprises the following operation steps:
S1, welding the upper conical container 1.1 of the conical liquid separation cover 1 and the radiation needle tube 1.2 at the bottom, as shown in figure 4.
And S2, connecting the dropper with the conical liquid separating cover 1 through screw threads, as shown in figure 4.
S3, drilling a hole in the cylinder clamp 3.1, and preparing a screw.
And S4, drilling a hole on the platform support frame 5, connecting the hole with the support leg through threads, and then welding the support leg with the half-opened cylinder and the cylinder clamp 3.1.
And S5, adhering a 1mm silica gel sheet on one side of the welded cylinder clamp by using 502 glue.
S6, screwing the half-opened cylinder with the two petals and the platform support frame welded well through the screw.
S7, inserting 4 radiation needle tubes 1.2 welded with the conical liquid separation cover 1 into the first sealing plug 2.
S8, the second sealing plug 6 is plugged into the lower bottom surface of the cylinder 3, two layers of filter paper are placed, the water stop clamp 6.3 is opened, and the rubber head dropper is placed into water.
s9, filling a sand sample with the height of 50mm, placing two layers of filter paper on the top of the sand sample, and plugging a first sealing plug 2 with a radiation needle tube 1.2 into the upper part of the cylinder 3.
And S10, introducing air into the dropper by using the air blower, observing whether the rubber head dropper with the capillary rubber plug B placed in the water bubbles or not, and checking the air tightness of the device.
And S12, if the air tightness of the device is good, putting a rubber head dropper of the peristaltic pump into a stainless steel dropper, and performing microbial grouting reinforcement on the sand sample.
Claims (6)
1. a device for uniformly grouting and reinforcing sandy soil by microbial radiation comprises a conical liquid dividing cover (1), a first sealing plug (2), a cylinder (3), a platform support frame (5) and a second sealing plug (6); the method is characterized in that:
the conical liquid separating cover (1) comprises an upper conical container (1.1) and a plurality of radiation needle tubes (1.2) connected to the bottom of the upper conical container (1.1), a plurality of drill holes (2.1) are formed in the first sealing plug (2), the plurality of radiation needle tubes (1.2) penetrate through the first sealing plug (2) through the drill holes (2.1) to enter the cylinder (3), and openings (1.4) are formed in the side wall of the radiation needle tube entering the cylinder (3);
The upper end and the lower end of the cylinder (3) are respectively plugged into a first sealing plug (2) and a second sealing plug (6);
A liquid discharge pipe is arranged on the second sealing plug (6);
The cylinder (3) is fixedly arranged on the platform supporting frame (5).
2. The device for uniformly grouting and reinforcing sandy soil by microbial radiation as claimed in claim 1, wherein: the top of the upper conical container (1.1) is in threaded connection with a dropper (1.3).
3. The device for uniformly grouting and reinforcing sandy soil by microbial radiation as claimed in claim 1, wherein: the first sealing plug (2) is a rubber plug and consists of an upper cylinder and a lower cylinder, and the lower cylinder is plugged into the cylinder (3).
4. The device for uniformly grouting and reinforcing sandy soil by microbial radiation as claimed in claim 1, wherein: second sealing plug (6) are the rubber buffer, constitute by upper and lower two cylinders, and lower cylinder stopper advances drum (3), goes up a cylinder and inserts a capillary (6.1), and capillary (6.1) stretch into drum (3) partly, is fixed with rubber tube (6.2) on capillary (6.1) that expose the rubber buffer, and rubber tube (6.2) are long to set up stagnant water and press from both sides (6.3).
5. The device for uniformly grouting and reinforcing sandy soil by microbial radiation as claimed in claim 1, wherein: the cylinder (3) is composed of two stainless steel semicircles, a cylinder clamp (3.1) is welded at the closed position of the two stainless steel semicircles, and the cylinder clamp (3.1) is connected by screws which are uniformly arranged from top to bottom.
6. The device for uniformly grouting and reinforcing sandy soil by microbial radiation as claimed in claim 1, wherein: the platform support frame (5) is welded with the cylinder (3); a plurality of platform supporting foot frames are arranged at the intersection of the cylindrical clip (3.1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920063527.7U CN209741848U (en) | 2019-01-15 | 2019-01-15 | device for uniformly grouting and reinforcing sandy soil through microbial radiation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920063527.7U CN209741848U (en) | 2019-01-15 | 2019-01-15 | device for uniformly grouting and reinforcing sandy soil through microbial radiation |
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| CN209741848U true CN209741848U (en) | 2019-12-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680689A (en) * | 2019-01-15 | 2019-04-26 | 三峡大学 | A kind of microorganism radiates the device and method of uniform consolidation by grouting sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680689A (en) * | 2019-01-15 | 2019-04-26 | 三峡大学 | A kind of microorganism radiates the device and method of uniform consolidation by grouting sand |
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Inventor after: Xiong Yu Inventor after: Zhi Yongyan Inventor after: Deng Huafeng Inventor after: Duan Lingling Inventor after: Xiao Yao Inventor after: Pan Deng Inventor after: Li Tao Inventor after: Qi Yu Inventor before: Zhi Yongyan Inventor before: Deng Huafeng Inventor before: Duan Lingling Inventor before: Xiong Yu Inventor before: Xiao Yao Inventor before: Pan Deng Inventor before: Li Tao Inventor before: Qi Yu |