Excitation liquid spraying device for exciting soil in-situ microorganisms and side slope reinforcing method

Abstract

The invention discloses an excitation liquid spraying device for exciting in-situ microorganisms in a soil body and a side slope reinforcing method, belongs to the technical field of biological geotechnical engineering, and solves the problems that an existing side slope treatment mode is large in manpower consumption and large in environmental damage. The bottom of the flight main body is provided with a landing support assembly; the bottom of the landing support assembly is connected with an excitation liquid container. A liquid conveying pipeline is arranged in the excitation liquid container, penetrates through the bottom of the excitation liquid container and is connected with the spray head. According to the device, a flying main body drives an excitation liquid container to fly to the position above a to-be-reinforced rock-soil body area through a landing support assembly; the microorganism excitation liquid in the excitation liquid container is sprayed out through a spray head and is sprayed to the surface of a to-be-reinforced rock-soil body area so as to induce in-situ bacteria in the soil body to massively breed; and then the cementing solution is sprayed to the surface of the to-be-reinforced rock-soil body area in the same mode, sediment is formed on the surface of the to-be-reinforced rock-soil body area, and the soil body is reinforced.

Description

Technical Field

[0001] The invention relates to the technical field of biological rock and soil engineering, and in particular to an exciting liquid spraying device for exciting in-situ microorganisms in soil and a slope reinforcement method. Background Art

[0002] Dangerous rock slopes have always been a potential threat to people's production and life. At present, the commonly used methods for slope management include brushing to reduce load, grouting reinforcement, drainage anchoring and planting vegetation, but the implementation of these methods is often accompanied by a large amount of manpower and mechanical equipment. When the terrain is complex, the difficulty of management increases exponentially, and the transformation of the slope will also damage the local ecological environment to a certain extent. In recent years, microbial induced carbonate precipitation (MICP) technology has gradually been applied to the reinforcement of rock and soil. Its principle is to decompose urea through microbial metabolism and combine with calcium ions in the environment to form calcium carbonate precipitation, thereby improving the filling of soil pores, achieving the purpose of enhancing the shear strength of the soil and improving the permeability. However, the traditional MICP method generally requires the injection of a large amount of foreign bacterial solution and cementing solution into the internal circulation of the rock and soil to be reinforced. This type of slope reinforcement method is cumbersome to construct and consumes a lot of manpower. It also requires the introduction of new bacteria into the rock and soil area to be reinforced, which can easily lead to the destruction of the ecological environment and have a serious impact on the surrounding native environment. Foreign bacteria usually come from laboratory propagation and have poor environmental adaptability. They are not native bacteria in the soil. After being injected into the soil area to be reinforced, the number and mineralization capacity of the bacteria will be reduced to a certain extent. In order to ensure quality, a large number of foreign bacteria need to be introduced. However, due to the structural differences in the soil, the distribution of the bacterial solution will also show obvious anisotropy, and the soil reinforcement effect will be uneven.

[0003] In summary, an environmentally friendly, labor-saving and efficient microbial reinforcement method for slope rock and soil is proposed, which has specific practical value. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an stimulating liquid spraying device for stimulating in-situ microorganisms in soil and a slope reinforcement method, so as to solve the problems of high manpower consumption and great environmental damage in the existing slope management methods.

[0005] In the first aspect, in order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0006] A device for spraying an exciting liquid for exciting in-situ microorganisms in soil comprises a flying body, a landing support assembly is arranged at the bottom of the flying body; an exciting liquid container is connected to the bottom of the landing support assembly; an infusion pipeline is arranged inside the exciting liquid container, the infusion pipeline passes through the bottom of the exciting liquid container and is connected to a spray head.

[0007] In this scheme, the microbial stimulating liquid is loaded into the interior of the stimulating liquid container, and the flight body drives the stimulating liquid container to rise above the rock and soil area to be reinforced through the landing bracket assembly; the microbial stimulating liquid inside the stimulating liquid container is sprayed out through the nozzle and sprayed onto the surface of the rock and soil area to be reinforced, so as to induce the in-situ bacteria inside the soil to multiply in large numbers; at the same time, the stimulating liquid spraying device can also be used to spray the cementing solution to form a precipitate on the surface of the rock and soil area to be reinforced, so as to achieve its reinforcement; compared with the method of circulating the bacterial solution and the cementing solution into the rock and soil area to be reinforced, this method is simple to operate and saves manpower; and there is no need to introduce new bacteria into the rock and soil area to be reinforced, and will not damage the ecological environment.

[0008] Furthermore, the flight body includes an upper mounting platform and a lower mounting platform, four mounting blocks are arranged between the upper mounting platform and the lower mounting platform, and four sets of propeller assemblies are respectively connected to the four mounting blocks; a control system is installed on the top of the upper mounting platform;

[0009] The propeller assembly includes a connecting rod, one end of which is connected to the mounting platform, and the other end of the connecting rod is connected to the motor mounting seat, on which a drive motor is mounted, and a wiring harness of the drive motor passes through the connecting rod and is connected to the control system; the output shaft of the drive motor is connected to the propeller body.

[0010] In this solution, four drive motors respectively drive four propeller bodies to rotate. The four propeller bodies provide lift to drive the excitation liquid spraying device to rise to the top of the rock and soil area to be reinforced, thereby achieving efficient spraying of the microbial excitation liquid. It is suitable for areas with complex terrain or steep surrounding rocks that are inconvenient for construction workers to enter, and has good environmental adaptability.

[0011] Furthermore, the landing bracket assembly includes two bow-shaped brackets, and the middle parts of the two brackets are installed at the bottom of the mounting platform; both ends of the two brackets are provided with pin holes, and the two pin holes on the same side are sleeved on the same connecting shaft; the two connecting shafts are respectively arranged on both sides of the excitation liquid container.

[0012] Furthermore, a plurality of liquid outlet holes are provided on a section of the liquid infusion pipeline located inside the excitation liquid container.

[0013] In this solution, a plurality of liquid outlets are provided, so that even if the liquid level of the microorganism stimulating liquid in the stimulating liquid container drops, the microorganism stimulating liquid can still enter the liquid delivery pipeline and be sprayed out from the nozzle.

[0014] In a second aspect, the present invention provides a slope reinforcement method for stimulating in-situ microorganisms in soil based on an stimulating liquid spraying device for stimulating in-situ microorganisms in soil provided in the first aspect, comprising the following steps:

[0015] S1: prepare microbial stimulating solution;

[0016] S2: Use an exciting liquid spraying device to spray the microbial exciting liquid to the rock and soil area to be reinforced;

[0017] S3: preparing cementing solution;

[0018] S4: spray the cementing solution to the rock and soil area to be reinforced using an exciting liquid spraying device;

[0019] S5: Repeat steps S1 to S4 to reinforce the rock and soil area to be reinforced multiple times.

[0020] In this scheme, an stimulating liquid spraying device is used to spray microbial stimulating liquid and cementing solution successively on the rock and soil area to be reinforced. The microbial stimulating liquid can effectively activate the native mineralizing bacteria of the soil to multiply in large numbers, and the reproduced bacteria induce the cementing solution to precipitate in the rock and soil area to be reinforced. This slope reinforcement method has a fast reinforcement speed and high efficiency, and can cover a large area to be reinforced.

[0021] Furthermore, in S1, yeast extract, nickel chloride hexahydrate and ammonium chloride are dissolved in water and mixed evenly to obtain a microorganism stimulating solution.

[0022] Furthermore, S2 includes:

[0023] S201: putting the microorganism stimulating liquid into the stimulating liquid container;

[0024] S202: Controlling the drive motor to start through the control system, the drive motor drives the propeller body to rotate, and drives the excitation liquid spraying device to rise above the rock and soil area to be reinforced;

[0025] S203: The microorganism stimulating liquid in the stimulating liquid container enters the nozzle through the liquid delivery pipe, and is sprayed out from the nozzle to the surface of the rock and soil area to be reinforced;

[0026] S204: Let stand for 24 to 48 hours after spraying.

[0027] In this scheme, the microbial stimulating liquid is sprayed and then left to stand to reserve reproduction time for the in-situ bacteria inside the soil.

[0028] Further, in S3, urea, calcium chloride and yeast extract are dissolved in water and mixed evenly to obtain a cementing solution.

[0029] Furthermore, S4 includes:

[0030] S401: Put the cementing solution into the exciting liquid container;

[0031] S402: Control the propeller body to rotate, driving the excitation liquid spraying device to rise above the rock and soil area to be reinforced;

[0032] S403: The cementing solution in the stimulating liquid container enters the nozzle through the liquid delivery pipe, and is sprayed out from the nozzle to the surface of the rock and soil area to be reinforced;

[0033] S404: Let stand for 18 to 24 hours after spraying.

[0034] Furthermore, the volume of the microbial excitation liquid is 2 to 3 times the pore volume of the rock and soil area to be reinforced; the volume of the cementing solution is 2 to 3 times the pore volume of the rock and soil area to be reinforced.

[0035] The beneficial effects of the present invention are:

[0036] When the stimulating liquid spraying device for stimulating in-situ microorganisms in soil provided by the present invention is used, the microbial stimulating liquid and the cementing solution are loaded into an stimulating liquid container, and the propeller body is used to provide lift to drive the stimulating liquid spraying device to rise to just above the rock and soil area to be reinforced, thereby realizing large-area spraying of the microbial stimulating liquid and the cementing solution, and the reinforcement efficiency is higher. There is no need to inject the microbial stimulating liquid and the cementing solution into the soil in the area to be reinforced, and it is suitable for reinforcing slopes with complex terrain or steep terrain.

[0037] In the slope reinforcement method for stimulating in-situ microorganisms in soil provided by the present invention, a microbial stimulating liquid is evenly sprayed onto the surface of the rock and soil area to be reinforced to activate the native mineralizing bacteria in the soil to multiply in large quantities; after standing for a period of time, a cementing solution is filled into a liquid container body and sprayed onto the surface of the rock and soil area to be reinforced, and the propagated bacteria induce the cementing solution to produce precipitation, thereby realizing the microbial reinforcement process; compared with the existing microbial reinforcement slope, the in-situ bacterial reproduction in the soil is activated, and there is no need to inject a large amount of foreign bacteria and cementing solution into the rock and soil area to be reinforced, thereby protecting the ecological environment; and, compared with foreign bacteria, the native bacteria in the soil are more evenly distributed in the soil, and the soil reinforcement effect is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural diagram of an exciting liquid spraying device for exciting in-situ microorganisms in soil according to the present invention;

[0039] Figure 2 The present invention is a front view of an exciting liquid spraying device for exciting in-situ microorganisms in soil.

[0040] Reference numerals:

[0041] 1. Flight body; 11. Upper mounting platform; 12. Control system; 13. Propeller assembly; 131. Connecting rod; 132. Motor mounting seat; 133. Driving motor; 134. Propeller body; 14. Lower mounting platform; 15. Mounting block; 2. Landing support assembly; 21. Support; 22. Connecting shaft; 3. Excitation liquid container; 4. Infusion pipeline; 41. Liquid outlet; 5. Nozzle; DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The specific implementation of the present invention is described below to facilitate the understanding of the present invention by those skilled in the art, but it should be clear that the present invention is not limited to the scope of the specific implementation. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

[0043] Example 1

[0044] like Figure 1 As shown, this embodiment provides an exciting liquid spraying device for exciting in-situ microorganisms in soil. The exciting liquid spraying device can be used to evenly spray microbial exciting liquid and cementing solution to the rock and soil area to be reinforced, thereby realizing large-area reinforcement of the slope; it specifically includes:

[0045] The flight body 1, the landing support assembly 2, the excitation liquid container 3 and the infusion pipeline 4;

[0046] Among them, a landing support assembly 2 is provided at the bottom of the flight body 1; an excitation liquid container 3 is connected to the bottom of the landing support assembly 2; a liquid infusion pipeline 4 is provided inside the excitation liquid container 3, and the liquid infusion pipeline 4 passes through the bottom of the excitation liquid container 3 and is connected to the nozzle 5. When in use, the microbial excitation liquid is loaded into the excitation liquid container 3, and the flight body 1 drives the excitation liquid container 3 to rise above the rock and soil area to be reinforced through the landing support assembly 2; the microbial excitation liquid inside the excitation liquid container 3 is sprayed out through the nozzle 5 and sprayed onto the surface of the rock and soil area to be reinforced, so as to induce the in-situ bacteria in the soil to multiply in large quantities; and the cementing solution is sprayed onto the surface of the rock and soil area to be reinforced in the same way by using the excitation liquid spraying device, and precipitation is formed on the surface of the rock and soil area to be reinforced to achieve its reinforcement.

[0047] The flight body 1 includes an upper mounting platform 11 and a lower mounting platform 14 , four mounting blocks 15 are arranged between the upper mounting platform 11 and the lower mounting platform 14 , and four sets of propeller assemblies 13 are respectively connected to the four mounting blocks 15 ; a control system 12 is installed on the top of the upper mounting platform 11 .

[0048] The propeller assembly 13 includes a connecting rod 131, a motor mounting seat 132, a driving motor 133 and a propeller body 134; one end of the connecting rod 131 is connected to the mounting platform, and the other end of the connecting rod 131 is connected to the motor mounting seat 132, on which the driving motor 133 is installed, and the wiring harness of the driving motor 133 passes through the connecting rod 131 and is connected to the control system 12; the output shaft of the driving motor 133 is connected to the propeller body 134. The four driving motors 133 respectively drive the four propeller bodies 134 to rotate, and the four propeller bodies 134 provide lift to drive the excitation liquid spraying device to rise to the top of the rock and soil area to be reinforced.

[0049] like Figure 2 As shown, the landing bracket assembly 2 includes two bow-shaped brackets 21, and the middle parts of the two brackets 21 are installed at the bottom of the mounting platform; both ends of the two brackets 21 are provided with pin holes, and the two pin holes on the same side are sleeved on the same connecting shaft 22; the two connecting shafts 22 are respectively arranged on both sides of the excitation liquid container 3.

[0050] A section of the infusion pipe 4 located inside the excitation liquid container 3 is provided with a plurality of liquid outlet holes 41 ; even if the liquid level of the microorganism excitation liquid in the excitation liquid container 3 drops, the microorganism excitation liquid can still enter the infusion pipe 4 and be sprayed out from the nozzle 5 .

[0051] Example 2

[0052] This embodiment provides a slope reinforcement method for stimulating in-situ microorganisms in soil based on an stimulating liquid spraying device for stimulating in-situ microorganisms in soil provided in Embodiment 1, comprising the following steps:

[0053] S1: Dissolve yeast extract, nickel chloride hexahydrate and ammonium chloride in water, mix well, and prepare a microbial stimulating solution; the volume of the microbial stimulating solution is 2 to 3 times the pore volume of the rock and soil area to be reinforced.

[0054] S2: Use the stimulating liquid spraying device to spray the microbial stimulating liquid to the rock and soil area to be reinforced; specifically including:

[0055] S201: Put the microorganism stimulating liquid into the stimulating liquid container 3;

[0056] S202: The control system 12 controls the drive motor 133 to start, and the drive motor 133 drives the propeller body 134 to rotate, and drives the excitation liquid spraying device to rise above the rock and soil area to be reinforced;

[0057] S203: The microorganism stimulating liquid in the stimulating liquid container 3 enters the nozzle 5 through the liquid delivery pipe 4, and is sprayed out from the nozzle 5 to the surface of the rock and soil area to be reinforced;

[0058] S204: After spraying, let it stand for 24 to 48 hours to allow time for the in-situ bacteria in the soil to reproduce.

[0059] S3: Dissolve urea, calcium chloride and yeast extract in water, mix well, and obtain a cementing solution; the volume of the cementing solution is 2 to 3 times the pore volume of the rock and soil area to be reinforced.

[0060] S4: Use the stimulating liquid spraying device to spray the cementing solution to the rock and soil area to be reinforced; specifically including:

[0061] S401: Put the cementing solution into the exciting liquid container 3;

[0062] S402: Control the propeller body 134 to rotate, driving the excitation liquid spraying device to rise above the rock and soil area to be reinforced;

[0063] S403: The cementing solution in the stimulating liquid container 3 enters the nozzle 5 through the liquid delivery pipe 4, and is sprayed out from the nozzle 5 to the surface of the rock and soil area to be reinforced;

[0064] S404: Let stand for 18 to 24 hours after spraying.

[0065] S5: During the reinforcement process, the rate of increase of calcium carbonate precipitation content in the rock and soil mass to be reinforced and the activity of microbial mineralization urease in the effluent are tested, and steps S1 to S4 are repeated according to the test results to reinforce the rock and soil mass to be reinforced multiple times; after the reinforcement is completed, enter S6.

[0066] S6: Conduct sampling unit tests on the strength of rock and soil before and after reinforcement to measure factors affecting slope safety such as soil strength and permeability, so as to evaluate the slope reinforcement effect and adjust the spraying method and amount to obtain the most significant reinforcement effect.

[0067] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the invention.

Claims

1. A device for spraying an stimulating liquid for stimulating in-situ microorganisms in soil, characterized in that: The invention comprises a flying body (1), wherein a landing support assembly (2) is arranged at the bottom of the flying body (1); an excitation liquid container (3) is connected to the bottom of the landing support assembly (2); an infusion pipeline (4) is arranged inside the excitation liquid container (3), and the infusion pipeline (4) passes through the bottom of the excitation liquid container (3) and is connected to a nozzle (5).

2. The device for spraying stimulating liquid for stimulating in-situ microorganisms in soil according to claim 1, characterized in that: The flight body (1) comprises an upper mounting platform (11) and a lower mounting platform (14); four mounting blocks (15) are arranged between the upper mounting platform (11) and the lower mounting platform (14); four sets of propeller assemblies (13) are respectively connected to the four mounting blocks (15); a control system (12) is installed on the top of the upper mounting platform (11); The propeller assembly (13) comprises a connecting rod (131), one end of the connecting rod (131) is connected to the mounting platform (11), the other end of the connecting rod (131) is connected to a motor mounting seat (132), a driving motor (133) is mounted on the motor mounting seat (132), a wiring harness of the driving motor (133) passes through the connecting rod (131) and is connected to the control system (12); a propeller body (134) is connected to the output shaft of the driving motor (133).

3. The device for spraying stimulating liquid for stimulating in-situ microorganisms in soil according to claim 2, characterized in that: The landing support assembly (2) comprises two brackets (21) with an arched structure, the middle parts of the two brackets (21) are mounted on the bottom of the mounting platform (11); both ends of the two brackets (21) are provided with latch holes, and the two latch holes on the same side are sleeved on the same connecting shaft (22); the two connecting shafts (22) are respectively arranged on both sides of the excitation liquid container (3).

4. The device for spraying stimulating liquid for stimulating in-situ microorganisms in soil according to claim 3, characterized in that: A section of the liquid infusion pipeline (4) located inside the excitation liquid container (3) is provided with a plurality of liquid outlet holes (41).

5. A slope reinforcement method using the stimulating liquid spraying device for stimulating in-situ microorganisms in soil according to claim 4, characterized in that: The following steps are involved: S1: prepare microbial stimulating solution; S2: Use an exciting liquid spraying device to spray the microbial exciting liquid to the rock and soil area to be reinforced; S3: preparing cementing solution; S4: spray the cementing solution to the rock and soil area to be reinforced using an exciting liquid spraying device; S5: Repeat steps S1 to S4 to reinforce the rock and soil area to be reinforced multiple times.

6. The slope reinforcement method using the stimulating liquid spraying device for stimulating in-situ microorganisms in soil according to claim 5, characterized in that: In the above S1, yeast extract, nickel chloride hexahydrate and ammonium chloride are dissolved in water and mixed evenly to obtain a microorganism stimulating solution.

7. The slope reinforcement method using the stimulating liquid spraying device for stimulating in-situ microorganisms in soil according to claim 5, characterized in that: The S2 includes: S201: placing the microorganism stimulating liquid into the stimulating liquid container (3); S202: The control system (12) controls the drive motor (133) to start, and the drive motor (133) drives the propeller body (134) to rotate, thereby driving the excitation liquid spraying device to rise above the rock and soil area to be reinforced; S203: The microorganism stimulating liquid in the stimulating liquid container (3) enters the nozzle (5) through the liquid delivery pipe (4), and is sprayed out from the nozzle (5) to the surface of the rock and soil area to be reinforced; S204: Let stand for 24 to 48 hours after spraying.

8. The slope reinforcement method using the stimulating liquid spraying device for stimulating in-situ microorganisms in soil according to claim 5, characterized in that: In S3, urea, calcium chloride and yeast extract are dissolved in water and mixed evenly to obtain a cementing solution.

9. The slope reinforcement method using the stimulating liquid spraying device for stimulating in-situ microorganisms in soil according to claim 5, characterized in that: The S4 includes: S401: Add the cementing solution into the exciting liquid container (3); S402: Controlling the propeller body (134) to rotate, driving the excitation liquid spraying device to rise above the rock and soil area to be reinforced; S403: The cementing solution in the stimulating liquid container (3) enters the nozzle (5) through the liquid delivery pipe (4), and is sprayed out from the nozzle (5) to the surface of the rock and soil area to be reinforced; S404: Let stand for 18 to 24 hours after spraying.

10. The slope reinforcement method using the stimulating liquid spraying device for stimulating in-situ microorganisms in soil according to claim 5, characterized in that: The volume of the microbial stimulating liquid is 2 to 3 times the pore volume of the rock and soil area to be reinforced; the volume of the cementing solution is 2 to 3 times the pore volume of the rock and soil area to be reinforced.

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