CN210719880U - Test device for preparing microbial cemented rock joint surface - Google Patents
Test device for preparing microbial cemented rock joint surface Download PDFInfo
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- CN210719880U CN210719880U CN201921512157.7U CN201921512157U CN210719880U CN 210719880 U CN210719880 U CN 210719880U CN 201921512157 U CN201921512157 U CN 201921512157U CN 210719880 U CN210719880 U CN 210719880U
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Abstract
The utility model discloses a testing device for preparing microbial cemented rock joint surfaces, which comprises a horizontal fixing device and a sealing device; the horizontal fixing device comprises a concave main body consisting of two side baffles and a bottom plate, fixing bolts for connecting the two side baffles and a groove for mounting the sealing device, and the sealing device comprises a sealing rubber ring mounted on a joint surface of the rock test piece, a sealing ring for fixing the sealing rubber ring and injection holes arranged on two sides of the top of the sealing ring. The utility model discloses a test device simple structure, it is easy and simple to handle, have wide application prospect in the induced calcium carbonate precipitation of microorganism is experimental between indoor rock joint.
Description
Technical Field
The utility model relates to a rock joint face research field among the geotechnical engineering, concretely relates to test device of preparation microorganism cemented rock joint face.
Background
In the field of geotechnical engineering, the existence of fractured rocks has great potential danger to rocky slope reinforcement engineering, and seepage prevention is an important and complex technology. The traditional method for plugging the cracks mainly comprises high-pressure grouting plugging, and the cement slurry is used as a filling material and a bonding agent by utilizing the fluidity and viscosity of the cement slurry. However, cement paste has high viscosity, and has certain limitation on the flow of the cement paste, and the traditional method is not environment-friendly and can cause environmental pollution.
In recent decades, researchers in related fields combine with multiple subject knowledge to realize the utility model of an MICP technology, and a large number of experiments show that the MICP technology can obviously improve the integrity and the strength of sandy soil, can obviously reduce the permeability of buildings (structures) such as dams and basements, and can repair concrete cracks. In the field of rock joint research, compared with the traditional fracture plugging technology, the MICP technology has the advantages of low viscosity, small size, no pollution and the like. Meanwhile, related experiments show that the technology has practicability in application of blocking rock cracks, and the purpose of blocking longer and smaller cracks can be achieved by utilizing the advantages of the technology. However, the research of the MICP technology on the aspect of rock fracture plugging is not sufficient, and most of the MICP technology is under the indoor research state.
Adopt peristaltic pump or dead weight to provide power for the injection more when studying sand, in the experimentation sand is the complete submergence in microorganism mixed solution, and after the experiment, because sand itself has little hole, can filter the moisture in the experimentation well. However, this method is not suitable for injecting rock fractures. In the indoor research stage, utilize the mould to prepare the cement piece that corresponds specification promptly rock test piece joint, consequently need the test device of unique suitable rock test piece joint, for the cemented joint provides different joint width, provides different injection rate, different solution mix injection tactics and provide circulation injection condition etc. in the experimentation. Meanwhile, in the experimental process, salt-forming educt is crystallized by taking bacteria as nuclei, so that the microbial solution cannot be mixed with the nutrient solution of urea and calcium ions before injection.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of little biological solution circulation injection and separation solution mixed injection in the experiment of indoor rock crack, the utility model provides a preparation microorganism cemented rock joint face's test device realizes that little biological solution is sufficient circulation flow in fissured reaction range, finally forms evenly distributed ground salify reactant in the crack, reaches the effect of filling, cemented crack, obtains microorganism cemented rock joint face.
In order to achieve the above object, the utility model provides a preparation microorganism cemented rock joint face's test device, include:
horizontal fixing device and sealing device;
the horizontal fixing device comprises a concave main body consisting of two side baffles and a bottom plate and a fixing bolt for connecting the two side baffles, and a groove for mounting the sealing device is formed in the middle of the main body;
the sealing device comprises a sealing rubber ring arranged on the joint surface of the rock test piece, a sealing ring for fixing the sealing rubber ring and injection holes arranged on two sides of the top of the sealing ring, and the sealing ring is arranged in a groove in the middle of the main body.
Furthermore, two sides of the horizontal fixing device are provided with two baffle plates, and the two baffle plates on the opposite sides are connected through fixing bolts respectively.
Furthermore, the sealing ring is of a square frame structure, and two connecting ends of the sealing ring are fixedly connected through a sealing bolt.
Further, the injection hole on one side of the top of the sealing ring is connected with a solution injection inlet with a T-shaped structure.
Further, the injection inlet is connected with the injection hole by adopting a threaded interface.
Further, the injection inlet is provided with a strapping means.
Further, the injection hole on the other side of the top of the sealing ring is connected with a solution injection outlet with an I-shaped structure.
Further, the injection outlet is connected with the injection hole by adopting a threaded interface.
Further, the injection outlet is provided with a bundling member.
The test method of the test device for preparing the microbial cemented rock joint surface comprises the following steps:
a. sleeving a sealing rubber ring: firstly, cleaning impurities on the surface of a rock test piece by using a soft brush, then respectively sleeving two sealing rubber rings on joint surfaces of a group of rock test pieces, and finally adjusting the distance between the sealing rubber rings and the joint of the rock test piece to ensure that the rock joint formed by the group of rock test pieces is positioned in a gap formed by the sealing rubber rings;
b. placing a sealing ring: loosening a sealing bolt on the sealing ring, opening the sealing ring, and placing the sealing ring in a groove of the horizontal fixing device;
c. installing a rock test piece: firstly, taking down the fixing bolt, determining that the horizontal fixing platform is smooth and free of impurities, then installing one of a group of rock test pieces on one side of the horizontal fixing device, placing one side with a rock joint on the inner side, aligning the smooth side with the outer side of the horizontal fixing device, installing the other rock test piece on the other side of the horizontal fixing device in the same way, and ensuring that the bottom surface of the rock test piece is completely contacted with the bottom surface of the horizontal fixing device in the installation process;
d. adjusting the joint width of the rock specimen: simultaneously pushing the two rock test pieces to the middle position of the groove for installing the sealing ring towards the middle, and measuring the width of the rock joint by using a vernier caliper in the pushing process;
e. after the crack width is determined, mounting a fixing bolt of the horizontal fixing device, screwing down and fixing a rock test piece, then closing the sealing ring, checking whether the sealing ring is completely attached to the sealing rubber ring, and screwing down an upper bolt to perform pressure sealing on the sealing rubber ring;
f. connecting each solution rubber tube on an injection inlet of the T-shaped injection hole, wherein the injection power of the solution is provided by a peristaltic pump, and after the injection speed of the peristaltic pump is adjusted, the device can be subjected to a tightness detection test by using a mixed nutrient solution, and the qualified detection standard is that the device does not leak;
g. if the detection result of the tightness detection experiment is leakage, the microbial cemented rock joint test can be carried out, if the detection result of the tightness detection experiment is leakage, the sealing ring can be reinforced by screwing the bolt to prevent the leakage of the rock joint or the injection inlet and the injection outlet are bound by a thin iron wire, a self-locking nylon binding belt and the like to prevent the leakage, and the microbial cemented rock joint test is carried out after the tightness detection experiment result is debugged to be qualified;
h. after the solution injection process is finished, removing the rubber tube on the injection inlet, sucking supernatant in the rock joint surface through the injection outlet of the I-shaped injection hole by using a needle cylinder until the sucked solution is turbid, and performing a drying experiment on the cemented rock joint;
i. in the experimental process, if the requirement of circular injection exists, the solution discharged from the injection outlet is injected into the rock joint surface through the injection inlet.
The utility model discloses following beneficial effect has:
(1) the utility model can realize that the upper and lower surfaces of a group of rock test pieces are not staggered;
(2) the utility model can realize the width of various rock joints;
(3) the utility model can control different injection rates by adjusting the rotating speed of the peristaltic pump, and avoid increasing shearing force due to overlarge flow velocity, thereby destroying the nucleation of the existing precipitate;
(4) the utility model can ensure that the microorganism solution completely and fully permeates the rock joint surface;
(5) the utility model can carry out different solution mixing injection strategies and carry out contrast experiments;
(6) the utility model can realize the circular injection of the microorganism mixed solution between the joints of the rock test piece;
(7) the utility model discloses a test device simple structure, the method is easy and simple to handle, has wide application prospect in the induced calcium carbonate precipitation test of indoor rock internode microorganism.
Drawings
FIG. 1 is a schematic structural diagram of a testing apparatus for preparing a microbial cemented rock joint surface according to the present invention;
FIG. 2 is a schematic structural view of the middle horizontal fixing device of the present invention;
FIG. 3 is a schematic structural view of a middle seal rubber ring of the present invention;
FIG. 4 is a schematic view of the connection between the middle seal rubber ring and the rock test piece according to the present invention;
FIG. 5 is a schematic view of the structure of the middle sealing ring of the present invention;
figure 6 is the utility model discloses well sealing ring and the connection schematic diagram between the rock test piece.
Wherein the reference numerals are: 1. a baffle plate; 2. fixing the bolt; 3. a groove; 4. a rock test piece; 5. sealing the rubber ring; 6. a seal ring; 7. an injection hole; 8. an injection inlet; 9. and injecting the injection outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in FIG. 1, the testing device for preparing the microbial cemented rock joint surface of the utility model comprises a horizontal fixing device and a sealing device;
the horizontal fixing device comprises a concave main body consisting of two side baffles 1 and a bottom plate and a fixing bolt 2 for connecting the two side baffles 1, and a groove 3 for installing a sealing device is arranged in the middle of the main body, as shown in fig. 2.
Horizontal fixing device's spill main part provides a horizontal platform for rock test piece 4, and the baffle 1 of both sides has restricted rock test piece 4's lateral displacement, and fixing bolt 2 screws up after installing rock test piece 4 and confirming rock test piece 4 joint width, plays the effect of fixed rock test piece 4, and the recess 3 of installation sealing ring 6 provides installation space for sealing ring 6 to carry out the closure of rock joint.
Two baffles 1 which are symmetrical relative to the groove 3 are arranged on both sides of the horizontal fixing device; the horizontal fixing device adopts two fixing bolts 2, and each fixing bolt 2 is connected with two opposite baffle plates 1 to fix a rock test piece 4; the bottom plate of the horizontal fixing device is a concave plate provided with a groove for mounting the sealing ring 6, and the whole horizontal fixing device is a whole, so that a moving track is provided for the rock test piece 4, and the rock test piece 4 is kept in the same horizontal state.
The utility model discloses a sealing device is including installing sealing ring 5, the sealing ring 6 of fixed sealing ring 5 and the injection hole 7 of setting in 6 top both sides of sealing ring at the joint face department of rock test piece 4.
As shown in fig. 3 and 4, the packing rubber ring 5 is composed of two rectangular rubber rings with the size of 100mm × 200mm, and the packing rubber ring 5 is respectively sleeved on the joint surface of the rock test piece 4 before the sealing ring 6 is installed, so that the rock joint is ensured in a gap formed by the two packing rubber rings 5.
As shown in fig. 5 and 6, the sealing ring 6 is a square frame structure matched with the surface shape of the rock test piece 4, and two connecting ends in the center of the top of the sealing ring are fixedly connected through a sealing bolt; the sealing ring 6 is arranged in a groove of a bottom plate of the horizontal fixing device, and the periphery of the rock joint is sealed by applying pressure to the sealing rubber ring 5, so that the aim of preventing the solution from seeping outside the sealed rock joint is fulfilled.
An injection hole 7 at one side of the top of the sealing ring 6 is connected with a solution injection inlet 8 with a T-shaped structure; the two ends of the solution injection inlet 8 with the T-shaped structure are respectively connected with a microorganism solution and a nutrient solution containing urea and calcium ions by rubber tubes, so that the separation effect before mixing and the mixing effect before injection are achieved.
The injection hole 7 on the other side of the top of the sealing ring is connected with a solution injection outlet 9 with an I-shaped structure; after the solution injection process is finished, a needle cylinder can be used for sucking supernatant in the rock joint surface through the solution injection outlet 9 with the I-shaped structure, and a drying experiment can be carried out on the cemented rock joint until the sucked solution is turbid; in the experimental process, if circulation injection is required, the solution discharged from the injection outlet 9 is injected into the rock joint surface through the injection inlet 8.
For avoiding salifying educt to block the injection hole, the utility model discloses a T shape injection inlet 8 and I shape injection outlet 9 all adopt to take the screwed interface to be connected with injection hole 7, can replace conveniently after the jam appears.
In order to solve the possible leakage problem of the sealing device, the sealing device can prevent the leakage of the rock joints by tightening the sealing bolt to reinforce the sealing ring 6; in addition, the connecting positions of the T-shaped injection inlet 8, the I-shaped injection outlet 9 and the injection hole 7 are respectively provided with a binding part, such as a thin iron wire, a self-locking nylon ribbon and the like; the utility model discloses thereby can utilize and tie up the part and carry out the ligature to injection inlet 8 and injection outlet 9 and prevent the solution seepage.
The utility model discloses a preparation microbial cement rock joint face's test device's working process does:
firstly, cleaning impurities on the surface of a rock test piece 4 by using a soft brush, then respectively sleeving two sealing rubber rings 5 on joint surfaces of a group of rock test pieces 4, and finally adjusting the distance between the sealing rubber rings 5 and the joint of the rock test piece to ensure that the rock joint formed by the group of rock test pieces 5 is positioned in a gap formed by the sealing rubber rings 5; placing the sealing ring 6, loosening a sealing bolt on the sealing ring 6, opening the sealing ring 6, and placing the sealing ring 6 in a groove of the horizontal fixing device; installing the rock test piece 4, firstly taking down the fixing bolt 2, determining that the horizontal fixing device is smooth and free of impurities, then installing one rock test piece 4 in the group of rock test pieces 4 on one side of the horizontal fixing device, arranging one side with a rock joint on the inner side, aligning the smooth side with the outer side of the horizontal fixing device, installing the other rock test piece on the other side of the horizontal fixing device in the same way, and ensuring that the bottom surface of the rock test piece 4 is completely contacted with the bottom surface of the horizontal fixing device in the installation process; adjusting the joint width of the rock test pieces 4, pushing the two rock test pieces 4 to the middle of the groove 3 for mounting the sealing strip, and measuring the width of the rock joint by using a vernier caliper in the pushing process; after the crack width is determined, installing and screwing the fixed bolt 2 of the horizontal fixing device to fix the rock test piece, folding the sealing ring 6, checking that the sealing ring 6 is completely attached to the sealing rubber ring 5, and screwing the upper bolt to perform pressure sealing on the sealing rubber ring 5; connecting each solution rubber tube on the injection inlet 8, wherein the injection power of the solution is provided by a peristaltic pump, and after the injection speed of the peristaltic pump is adjusted, the device can be subjected to a tightness detection test by using a mixed nutrient solution, and the qualified detection standard is that the device does not leak; if the detection result of the tightness detection experiment is leakage-free, the microbial cemented rock joint test can be carried out, if the detection result of the tightness detection experiment is leakage, the sealing ring 6 can be reinforced by screwing the bolt to prevent the leakage of the rock joint or the injection inlet 8 and the injection outlet 9 can be bound by a thin iron wire, a self-locking nylon binding belt and the like to prevent the leakage, and the microbial cemented rock joint test is carried out after the tightness detection experiment result is debugged to be qualified; after the solution injection process is finished, removing the rubber tube on the injection inlet 8, sucking supernatant in the rock joint surface through the injection outlet 9 by using a needle cylinder until the sucked solution is turbid, and then performing a drying experiment on the cemented rock joint; in the experimental process, if the requirement of circulation injection exists, the solution discharged from the injection outlet 9 is injected into the rock joint surface through the injection inlet 8.
The utility model discloses a preparation microbial cement rock joint face's test device has advantages such as simple structure, convenient operation, compares with current relevant experimental apparatus, will little nutrient solution quantity minimizing of solution, urea and calcium ion when realizing the injection purpose, but the injection rate of solution also provides the condition of multiple solution mixed injection scheme for preparation microbial cement rock joint face is experimental.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (9)
1. The utility model provides a test device of preparation microorganism cemented rock joint face which characterized in that includes:
horizontal fixing device and sealing device;
the horizontal fixing device comprises a concave main body consisting of two side baffles (1) and a bottom base plate and a fixing bolt (2) for connecting the two side baffles (1), wherein a groove (3) for mounting the sealing device is formed in the middle of the main body;
the sealing device comprises a sealing rubber ring (5) arranged on a joint surface of a rock test piece (4), a sealing ring (6) for fixing the sealing rubber ring (5) and injection holes (7) formed in two sides of the top of the sealing ring (6), wherein the sealing ring (6) is arranged in a groove (3) in the middle of the main body.
2. The test device for preparing the microbial cemented rock joint surface according to claim 1, wherein two baffles (1) are arranged on two sides of the horizontal fixing device, and the two baffles (1) on the opposite sides are respectively connected through fixing bolts (2).
3. The testing apparatus for preparing the microbial cemented rock joint surface according to claim 1, wherein the sealing ring (6) is a square frame structure, and two connecting ends thereof are fixedly connected by a sealing bolt.
4. The test device for preparing the microbial cemented rock joint surface according to claim 1, characterized in that the injection hole (7) at the top side of the sealing ring (6) is connected with a solution injection inlet (8) with a T-shaped structure.
5. The testing apparatus for preparing microbial cemented rock joints according to claim 4, characterized in that the injection inlet (8) is connected with the injection hole (7) by a threaded interface.
6. The testing apparatus for the preparation of microbial cemented rock joints according to claim 5, characterised in that the injection inlet (8) is provided with strapping means.
7. The test device for preparing the microbial cemented rock joint surface according to claim 4, characterized in that the injection hole (7) on the other side of the top of the sealing ring (6) is connected with a solution injection outlet (9) with an I-shaped structure.
8. The testing apparatus for preparing microbial cemented rock joints according to claim 7, characterized in that the injection outlets (9) are connected to the injection holes (7) by threaded joints.
9. The testing apparatus for the preparation of microbial cemented rock joints as claimed in claim 8, characterised in that the injection outlets (9) are provided with strapping means.
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| CN201921512157.7U CN210719880U (en) | 2019-09-11 | 2019-09-11 | Test device for preparing microbial cemented rock joint surface |
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| CN201921512157.7U CN210719880U (en) | 2019-09-11 | 2019-09-11 | Test device for preparing microbial cemented rock joint surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730195A (en) * | 2020-12-24 | 2021-04-30 | 河南大学 | Precipitation fracture rock mass seepage-resistant experimental system based on induced calcium carbonate precipitation technology |
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2019
- 2019-09-11 CN CN201921512157.7U patent/CN210719880U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730195A (en) * | 2020-12-24 | 2021-04-30 | 河南大学 | Precipitation fracture rock mass seepage-resistant experimental system based on induced calcium carbonate precipitation technology |
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