CN114458152A - Pressure-bearing drilling and sealing device and method based on MICP - Google Patents
Pressure-bearing drilling and sealing device and method based on MICP Download PDFInfo
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- CN114458152A CN114458152A CN202111665812.4A CN202111665812A CN114458152A CN 114458152 A CN114458152 A CN 114458152A CN 202111665812 A CN202111665812 A CN 202111665812A CN 114458152 A CN114458152 A CN 114458152A
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- 238000005553 drilling Methods 0.000 title claims abstract description 105
- 238000007789 sealing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 10
- 101000965313 Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513) Aconitate hydratase A Proteins 0.000 title claims abstract 17
- 239000002689 soil Substances 0.000 claims abstract description 104
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000000725 suspension Substances 0.000 claims abstract description 34
- 230000002308 calcification Effects 0.000 claims abstract description 33
- 244000005700 microbiome Species 0.000 claims abstract description 28
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004202 carbamide Substances 0.000 claims abstract description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 18
- 238000009412 basement excavation Methods 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 15
- 230000008859 change Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 47
- 230000001580 bacterial effect Effects 0.000 claims description 19
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 9
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 8
- 239000001110 calcium chloride Substances 0.000 claims description 8
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 8
- 235000011148 calcium chloride Nutrition 0.000 claims description 8
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 7
- 108010046334 Urease Proteins 0.000 claims description 7
- -1 ammonium ions Chemical class 0.000 claims description 7
- 229910001424 calcium ion Inorganic materials 0.000 claims description 7
- 230000008595 infiltration Effects 0.000 claims description 6
- 238000001764 infiltration Methods 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 5
- 244000309464 bull Species 0.000 claims description 3
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- 230000005540 biological transmission Effects 0.000 claims 1
- 241000894006 Bacteria Species 0.000 abstract description 15
- 230000002787 reinforcement Effects 0.000 abstract description 13
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 43
- 238000007790 scraping Methods 0.000 description 23
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/002—Drilling with diversely driven shafts extending into the borehole
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/081—Screw-and-nut feed mechanisms
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
- E21B3/022—Top drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/005—Monitoring or checking of cementation quality or level
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Quality & Reliability (AREA)
- Geophysics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The application provides a pressure-bearing drilling and sealing device and method based on MICP, belongs to the technical field of soil body reinforcement, and comprises a foundation drilling assembly and an edge expanding and reinforcing assembly. And installing a flexible cup-shaped plug at the bottom of the drill hole to partially stop water, backfilling a certain gradation of sandy soil into the drill hole, installing a hole sealing device, and performing grouting and backflow water seepage operations in the drill hole until no water seeps out of the drill hole, thus finishing hole sealing. And an excavation device and a MICP grouting device are arranged on the rotating table, the periphery of the pressure-bearing drill hole is subjected to ring excavation, and a bacteria suspension, urea and CaCl solution are poured into a groove of the ring. Thereby cementing the soil particles and improving the bearing capacity, rigidity and erosion resistance of the foundation. Meanwhile, the grouting in the ring groove can effectively reduce the calcium carbonate particle loss in the soil and the acid-base change of the living environment of the microorganism caused by the permeation and exchange of water and soil outside, and maintain the stability of the strength of the MICP microorganism soil calcification.
Description
Technical Field
The application relates to the technical field of soil body reinforcement, in particular to a pressure-bearing drilling and hole sealing device and method based on MICP.
Background
The Microbial Induced Carbonate Precipitation (MICP) grouting technology is a new type of Microbial rock and soil treatment technology. By pouring the bacterial suspension and the cementing liquid (urea and CaCl2 solution) into the soil, microorganisms are induced to produce urease to decompose urea to generate carbonate ions and ammonium ions, and calcium carbonate is generated under the condition that calcium ions exist in the soil, so that soil particles are cemented, and the bearing capacity, rigidity and anti-erosion performance of the foundation are improved. The MICP grouting technology has the advantages of good slurry fluidity, strong permeability, adjustable reaction rate and cementing strength, small environmental pollution, small disturbance to soil and the like, and is widely applied to the fields of soft foundation treatment, sewage treatment, ancient cultural relic restoration, wind prevention and sand control, dam seepage prevention and the like.
However, the microorganisms participating in soil grouting solidification may cause safety problems, the acid-base change of soil may cause the decomposition of calcium carbonate and the limited propagation of microorganisms, and the rainwater infiltration and scouring in the soil may cause the loss of calcium carbonate and microorganisms, which all affect the safety and stability of the pressure-bearing borehole sealing.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a pressure-bearing drilling hole sealing device and method based on MICP, pressure-bearing drilling and grouting hole sealing are carried out on soil through a drilling device, and MICP grouting soil calcification operation is carried out on the periphery of the pressure-bearing drilling hole through motor rotation.
The application is realized as follows:
the application provides a pressure-bearing drilling and sealing device based on MICP includes basic drilling subassembly and expands limit and strengthen the subassembly.
The foundation drilling component comprises a foundation table, a jacking table, jacking guide rods, jacking lead screws, a drilling table, a jacking motor, grouting drill rods and a drilling motor, wherein the jacking table is symmetrically arranged above the foundation table, the jacking guide rods are uniformly arranged between the foundation table and the jacking table, the jacking lead screws are symmetrically and rotatably connected between the foundation table and the jacking table, two ends of the drilling table are driven to the surfaces of the jacking lead screws, the drilling table is slidably sleeved on the surfaces of the jacking guide rods, a body of the jacking motor is arranged on the jacking table, an output end of the jacking motor is driven to the upper ends of the jacking lead screws, the upper ends of the grouting drill rods are driven to be in the drilling table, a body of the drilling motor is arranged on the drilling table, an output end of the drilling motor is driven to be arranged at the upper ends of the grouting drill rods, and the edge expanding strengthening component comprises an edge expanding table, The edge expanding machine comprises a rotating table, a rotating gear shaft, a rotating motor, an edge expanding rail frame, an edge expanding sliding frame and an edge expanding hydraulic cylinder, wherein the edge expanding table is suspended below a base table, the rotating table is rotationally connected to the bottom of the edge expanding table, the rotating gear shaft is symmetrically rotationally connected below the base table, the lower end of the rotating gear shaft is meshed with the surface of the rotating table, a body of the rotating motor is suspended below the base table, the output end of the rotating motor is transmitted to the upper end of the rotating gear shaft, the edge expanding rail frame is uniformly arranged on the peripheral side of the rotating table, the edge expanding sliding frame slides on the surface of the edge expanding rail frame, a cylinder body of the edge expanding hydraulic cylinder is arranged on the edge expanding sliding frame, and one end of a piston rod of the edge expanding hydraulic cylinder is fixed on the edge expanding rail frame;
in an embodiment of the application, the foundation platform top evenly is provided with balanced seat, the foundation platform bottom evenly is provided with the suspension column, the limit platform is fixed in the suspension column lower extreme.
In an embodiment of this application, the symmetry is provided with first swivel mount on the basic bench, jacking platform bottom is provided with the second swivel mount, jacking lead screw both ends rotate connect in first swivel mount with between the second swivel mount.
In an embodiment of the present application, the drill floor is uniformly provided with a sliding guide sleeve, and the sliding guide sleeve is slidably sleeved on the surface of the jacking guide rod.
In an embodiment of the application, a first belt pulley is arranged at the output end of the drilling motor, a second belt pulley is arranged at the upper end of the grouting drill rod, and the first belt pulley is driven by the second belt pulley.
In one embodiment of the present application, the drill table is provided with a lead screw nut at both ends, and the lead screw nut is driven on the surface of the jacking lead screw.
In one embodiment of the application, a rotary gear ring is arranged in the rotary table, and a rotary gear is arranged at the lower end of the rotary gear shaft and meshed with the rotary gear ring.
In an embodiment of the application, the side of the rotary gear shaft is rotationally provided with a suspension seat, the suspension seat is suspended at the bottom of the base platform, and the rotary motor body is fixed on the suspension seat.
In an embodiment of the present application, a third belt pulley is fixed to the output end of the rotating motor, a fourth belt pulley is fixed to the upper end of the rotating gear shaft, and the third belt pulley is driven by the fourth belt pulley.
In an embodiment of the present application, a corner table is disposed around the rotating table, and the edge expanding rail is disposed on the corner table.
In an embodiment of the present application, the apparatus for sealing a pressure-bearing borehole based on MICP further comprises
The cofferdam strengthening assembly comprises a cofferdam hydraulic cylinder, edge scraping cutters, a positioning guide rod, edge expanding cutters, strengthening hydraulic cylinders, cementing liquid nozzles and bacterial liquid nozzles, wherein the cylinder body of the cofferdam hydraulic cylinder is uniformly arranged on one group of edge expanding sliding frames, the edge scraping cutters are symmetrically arranged at one end of the piston rod of the cofferdam hydraulic cylinder, the lower ends of the positioning guide rods are uniformly arranged at one end of the piston rod of the cofferdam hydraulic cylinder, the upper end of the positioning guide rod penetrates through the edge expanding sliding frames in a sliding manner, the edge expanding cutters are arranged at one end of the piston rod of the cofferdam hydraulic cylinder between the edge scraping cutters, the cylinder body of the strengthening hydraulic cylinder is uniformly arranged on one group of edge expanding sliding frames, the cementing liquid nozzles are arranged at one end of the piston rod of the strengthening hydraulic cylinder, and the bacterial liquid nozzles are arranged at one end of the piston rod of the strengthening hydraulic cylinder;
the detection strengthening assembly comprises a jacking hydraulic cylinder, a jacking detection main body, a ring wall hydraulic cylinder, a rotary motor and a ring wall detection main body, wherein cylinder bodies of the jacking hydraulic cylinder are symmetrically arranged on the edge expanding table, the jacking detection main body is arranged at one end of a piston rod of the jacking hydraulic cylinder, the cylinder bodies of the ring wall hydraulic cylinder are uniformly arranged on one group of the edge expanding sliding frames, a body of the rotary motor is arranged at one end of the piston rod of the ring wall hydraulic cylinder, and the ring wall detection main body is arranged at an output end of the rotary motor.
In an embodiment of the application, a knife rest is arranged between the edge scraping tools, the knife rest is fixed at one end of a piston rod of the cofferdam hydraulic cylinder, the edge expanding tools are fixed at the bottom of the knife rest, and the lower ends of the positioning guide rods are uniformly arranged on the knife rest.
In an embodiment of this application, it is provided with the connecting seat to strengthen pneumatic cylinder piston rod one end, the glued liquid mouth set up in connecting seat one end, glued liquid mouth upper end intercommunication is provided with a glued liquid section of thick bamboo, the bacterium liquid mouth set up in the connecting seat other end, bacterium liquid mouth upper end intercommunication is provided with a bacterium liquid section of thick bamboo.
In an embodiment of the application, the top pressure hydraulic cylinder body is provided with a support frame, the support frame is fixed on the edge expanding table, one end of a piston rod of the annular wall hydraulic cylinder is provided with a support, and the rotary motor body is fixed on the support.
A pressure-bearing drilling hole sealing device and method based on MICP, which utilizes the pressure-bearing drilling hole sealing device based on MICP of any one of claims, characterized by comprising the following steps:
adjusting the angle of a drilling platform, controlling the rotation and lifting feeding of a drill rod through a motor until the drill rod is drilled into a pressure-bearing underground water layer, then stopping the drilling, mounting a flexible cup-shaped plug at the bottom of the drill hole to partially stop water, backfilling sandy soil with a certain gradation into the drill hole, mounting a hole sealing device, performing grouting and backflow water seepage operations in the drill hole until no water seeps out from the drill hole, and finishing hole sealing;
the excavation radius and the lifting feeding of a cutter are controlled hydraulically, the rotation of the excavation cutter around a drill rod is controlled by a motor, the soil is excavated layer by layer, bacterial suspension, urea and CaCl solution are filled into an excavation ring groove, microorganisms are induced to generate urease to decompose the urea to generate carbonate ions and ammonium ions, and calcium carbonate is generated under the condition that calcium ions exist in the soil, so that soil particles are cemented, and the bearing capacity, the rigidity and the anti-erosion performance of a foundation are improved;
carry out calcification through detection device to digging the deep layer of ring inslot wall soil and detect, carry out calcification through detection device and detect to the bull stick region. The soil calcification omnibearing detection in the pressure-bearing drilling area is carried out in real time, the detection dead angle is reduced, the rework is carried out in time, and the engineering quality is improved. After the detection is qualified, the pressure-bearing ring layer protection is formed by grouting into the ring groove, the strength support is carried out on the pressure-bearing drill hole together by matching with the microbial soil calcification of the MICP, the loss of calcium carbonate particles in the soil and the acid-base change of the microbial living environment caused by external water and soil permeation exchange are reduced, and the strength stability of the MICP microbial soil calcification is maintained.
The beneficial effect of this application is: according to the pressure-bearing drilling and hole sealing device and method based on the MICP, when the device is used, the device is moved to a pressure-bearing drilling and hole sealing area, and the external balance device of the foundation platform is used for adjusting the drilling angle of the grouting drill rod. The rotation of slip casting drilling rod is controlled through the drilling motor, the drilling feed of slip casting drilling rod is controlled through the cooperation of the jacking motor, and the pressure-bearing drilling of soil is realized. And stopping the grouting drill rod drill bit after the grouting drill rod drill bit drills into the pressure-bearing underground water layer. And installing a flexible cup-shaped plug at the bottom of the drill hole to partially stop water, backfilling sandy soil with a certain gradation into the drill hole, installing a hole sealing device, and performing grouting and backflow water seepage operations into the drill hole until no water seeps out from the drill hole, thus finishing hole sealing. The rotary table is provided with an excavation device and an MICP grouting device, the rotation of the rotary table is controlled by a rotary motor, the periphery of the pressure-bearing drill hole is excavated, and bacteria suspension, urea and CaCl solution are filled into a groove of the ring, so that the bacteria suspension, the urea and the CaCl solution are leaked into the soil layer at the periphery of the whole pressure-bearing drill hole. Thereby cementing the soil particles and improving the bearing capacity, rigidity and erosion resistance of the foundation. Meanwhile, the grouting in the ring groove can effectively reduce the calcium carbonate particle loss in the soil and the acid-base change of the living environment of the microorganism caused by the permeation and exchange of water and soil outside, and maintain the stability of the strength of the MICP microorganism soil calcification.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic perspective view of a pressure-bearing drilling and sealing device based on MICP according to an embodiment of the present application;
FIG. 2 is a schematic perspective view of a basic drilling assembly according to an embodiment of the present disclosure;
fig. 3 is a schematic view of a first-view perspective structure of an edge-expanding reinforcement assembly according to an embodiment of the present disclosure;
fig. 4 is a schematic perspective view of a second perspective view of an edge-expanding reinforcement assembly according to an embodiment of the present disclosure;
FIG. 5 is a schematic perspective view of a cofferdam reinforcement assembly according to an embodiment of the present application;
fig. 6 is a schematic perspective view of a detection reinforcing assembly according to an embodiment of the present disclosure.
In the figure: 100-a base drill assembly; 110-a base station; 111-a balancing seat; 112-suspension posts; 113-a first transposition; 120-a jacking table; 121-second transposition; 130-jacking guide rod; 140-jacking screw rod; 150-drilling rig floor; 151-sliding guide sleeve; 152-lead screw nut; 160-jacking motor; 170-grouting a drill pipe; 171-a second pulley; 180-drilling motor; 181-a first pulley; 300-a flared reinforcement assembly; 310-an edge expanding table; 320-rotating table; 321-a rotating ring gear; 322-corner table; 330-rotating gear shaft; 331-a rotating gear; 332-a suspension mount; 333-a fourth pulley; 340-a rotating electrical machine; 341-third pulley; 350-expanding the edge rail frame; 360-flaring of the carriage; 370-an edge expanding hydraulic cylinder; 500-cofferdam reinforcement assembly; 510-cofferdam hydraulic cylinder; 520-edge scraping cutter; 521-a tool rest; 530-positioning guide rod; 540-expanding the edge cutter; 550-a reinforced hydraulic cylinder; 551-connecting base; 560-glue nozzle; 561-glue solution cylinder; 570-bacteria liquid nozzle; 571-a bacteria liquid cylinder; 700-detecting a reinforcing component; 710-jacking hydraulic cylinder; 711-a support; 720-top pressure detection main body; 730-circular wall hydraulic cylinder; 731-scaffold; 740-a rotary motor; 750-ringwall detection body.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Examples
As shown in fig. 1 to 6, the MICP-based pressure bearing borehole sealing apparatus according to an embodiment of the present application includes a foundation borehole assembly 100, a reaming reinforcement assembly 300, a cofferdam reinforcement assembly 500, and a detection reinforcement assembly 700. The edge-expanding reinforcing member 300 is installed at the bottom of the basic drilling member 100, the cofferdam reinforcing member 500 is installed at the circumferential side of the edge-expanding reinforcing member 300, and the inspection reinforcing member 700 is installed at the circumferential side of the edge-expanding reinforcing member 300. The foundation drilling assembly 100 drills rock soil through a hollow drill rod, and performs operations of sand soil backfilling and grouting backflow hole sealing; the cofferdam strengthening component 500 is matched with the edge expanding strengthening component 300 to carry out cofferdam excavation on rock and soil around the pressure-bearing drill hole, bacterial suspension and cementing liquid are poured into the inner wall of the cofferdam, sand and soil backfilling and grouting backflow sealing operations are carried out, the detection strengthening component 700 is matched with the edge expanding strengthening component 300 to detect rock and soil consolidation on the inner wall of the cofferdam, and rock and soil consolidation on the top of the rock and soil around the pressure-bearing drill hole is detected.
As shown in fig. 2-5, the microorganism induced carbonate precipitation grouting technology is a novel microorganism rock and soil treatment technology. However, the microorganisms participating in soil grouting solidification may cause safety problems, the acid-base change of soil may cause the decomposition of calcium carbonate and the limited propagation of microorganisms, and the rainwater infiltration and scouring in the soil may cause the loss of calcium carbonate and microorganisms, which all affect the safety and stability of the pressure-bearing borehole sealing.
The base drilling assembly 100 includes a base table 110, a jacking table 120, jacking guide rods 130, jacking lead screws 140, a drilling table 150, a jacking motor 160, grouting drill rods 170, and a drilling motor 180. The jacking table 120 is symmetrically arranged above the base table 110, the jacking guide rods 130 are uniformly arranged between the base table 110 and the jacking table 120, and the jacking guide rods 130 are respectively screwed with the base table 110 and the jacking table 120. Jacking screw 140 symmetry is rotated and is connected between basic platform 110 and jacking platform 120, the symmetry is provided with first swivel mount 113 on the basic platform 110, basic platform 110 and basic platform 110 spiro union, jacking platform 120 bottom is provided with second swivel mount 121, jacking platform 120 and second swivel mount 121 spiro union, jacking screw 140 both ends are rotated and are connected between first swivel mount 113 and second swivel mount 121, all be provided with the bearing in specific first swivel mount 113 and in the second swivel mount 121, jacking screw 140 both ends are fixed in the bearing. Two ends of the drilling platform 150 are driven on the surface of the jacking screw 140, two ends of the drilling platform 150 are provided with screw nuts 152, the screw nuts 152 are in threaded connection with the drilling platform 150, and the screw nuts 152 are driven on the surface of the jacking screw 140.
The drilling platform 150 is slidably sleeved on the surface of the jacking guide rod 130, the drilling platform 150 is uniformly provided with a sliding guide sleeve 151, the sliding guide sleeve 151 is in threaded connection with the drilling platform 150, and the sliding guide sleeve 151 is slidably sleeved on the surface of the jacking guide rod 130, so that the sliding support precision strength of the drilling platform 150 is improved. The body of the jacking motor 160 is arranged on the jacking table 120, and the jacking motor 160 is screwed with the jacking table 120. The output end of the jacking motor 160 is transmitted to the upper end of the jacking screw 140, and the jacking motor 160 is connected with the jacking screw 140 through a coupling. The upper end of the grouting drill rod 170 rotates in the drilling platform 150, a bearing is arranged in the drilling platform 150, and the upper end of the grouting drill rod 170 is fixed in the bearing. The drilling motor 180 is disposed on the drilling platform 150, and the drilling motor 180 is screwed to the drilling platform 150. The output end of the drilling motor 180 is transmitted to the upper end of the grouting drill rod 170, the output end of the drilling motor 180 is provided with a first belt wheel 181, the first belt wheel 181 is in key connection with the drilling motor 180, the upper end of the grouting drill rod 170 is provided with a second belt wheel 171, the second belt wheel 171 is in key connection with the grouting drill rod 170, and the first belt wheel 181 is transmitted to the second belt wheel 171.
Wherein, the top of the base platform 110 is evenly provided with a balance seat 111, the balance seat 111 is in bolt connection with the base platform 110, and the concrete balance seat 111 joins externally a balancing device to adjust the drilling angle of the pressure-bearing drilling hole.
The device is moved to a pressure-bearing drilling hole sealing area, and the balance seat 111 is externally hung with a balance device to adjust the drilling angle of the grouting drill rod 170. The rotation of the grouting drill rod 170 is controlled through the drilling motor 180, and the drilling feed of the grouting drill rod 170 is controlled by matching with the jacking motor 160, so that the pressure-bearing drilling of soil is realized. And stopping after the drill bit of the grouting drill rod 170 drills into the pressure-bearing underground water layer. And installing a flexible cup-shaped plug at the bottom of the drill hole to partially stop water, backfilling sandy soil with a certain gradation into the drill hole, installing a hole sealing device, and performing grouting and backflow water seepage operations into the drill hole until no water seeps out from the drill hole, thus finishing hole sealing.
The flaring reinforcement assembly 300 includes a flaring table 310, a rotary table 320, a rotary pinion 330, a rotary motor 340, a flaring rail 350, a flaring carriage 360, and a flaring hydraulic cylinder 370. The edge expanding table 310 is suspended below the base table 110, suspension columns 112 are uniformly arranged at the bottom of the base table 110, the edge expanding table 310 is fixed at the lower ends of the suspension columns 112, and the suspension columns 112 are in threaded connection with the base table 110 and the edge expanding table 310 respectively. The rotating table 320 is rotatably connected to the bottom of the expanding table 310. The rotary gear shaft 330 is symmetrically and rotatably connected below the base table 110, a suspension seat 332 is rotatably arranged on the peripheral side of the rotary gear shaft 330, a bearing is arranged in the specific suspension seat 332, the rotary gear shaft 330 is installed in the bearing in a key mode, the suspension seat 332 is suspended at the bottom of the base table 110, and the suspension seat 332 is in threaded connection with the base table 110. The lower end of the rotary gear shaft 330 is engaged with the surface of the rotary table 320, a rotary gear ring 321 is arranged in the rotary table 320, the rotary gear ring 321 is in screw connection with the rotary table 320, a rotary gear 331 is arranged at the lower end of the rotary gear shaft 330, the rotary gear shaft 330 is in key connection with the rotary gear 331, and the rotary gear 331 is engaged with the rotary gear ring 321.
The body of the rotating electrical machine 340 is suspended below the base table 110, the body of the rotating electrical machine 340 is fixed on the suspension base 332, and the rotating electrical machine 340 is screwed with the suspension base 332. The output end of the rotating motor 340 is transmitted to the upper end of the rotating gear shaft 330, the output end of the rotating motor 340 is fixed with a third belt wheel 341, the third belt wheel 341 is in key connection with the rotating motor 340, the upper end of the rotating gear shaft 330 is fixed with a fourth belt wheel 333, the fourth belt wheel 333 is in key connection with the rotating gear shaft 330, and the third belt wheel 341 is transmitted to the fourth belt wheel 333. The edge-expanding rail frame 350 is uniformly arranged on the periphery of the rotating platform 320, the corner platform 322 is welded with the rotating platform 320, the edge-expanding rail frame 350 is arranged on the corner platform 322, and the edge-expanding rail frame 350 is in threaded connection with the corner platform 322. The edge-expanding sliding frame 360 slides on the surface of the edge-expanding rail frame 350, and the edge-expanding sliding frame 360 slides on the surface of the edge-expanding sliding frame 360 through a sliding block. The body of the edge-expanding hydraulic cylinder 370 is arranged on the edge-expanding sliding frame 360, the edge-expanding hydraulic cylinder 370 is in threaded connection with the edge-expanding sliding frame 360, one end of the piston rod of the edge-expanding hydraulic cylinder 370 is fixed on the edge-expanding rail frame 350, and the edge-expanding hydraulic cylinder 370 is in threaded connection with the edge-expanding rail frame 350.
Wherein, the cylinder body of the reinforced hydraulic cylinder 550 is uniformly arranged on one group of the edge expanding sliding frame 360, and the reinforced hydraulic cylinder 550 is in bolt connection with the edge expanding sliding frame 360. The cementing liquid nozzle 560 is arranged at one end of a piston rod of the strengthening hydraulic cylinder 550, a connecting seat 551 is arranged at one end of the piston rod of the strengthening hydraulic cylinder 550, the cementing liquid nozzle 560 is arranged at one end of the connecting seat 551, and the connecting seat 551 is respectively in threaded connection with the strengthening hydraulic cylinder 550 and the cementing liquid nozzle 560. The upper end of the cementing liquid nozzle 560 is communicated with a cementing liquid cylinder 561, and the cementing liquid cylinder 561 is a urea and CaCl2 solution. The bacteria liquid nozzle 570 is arranged at one end of the piston rod of the intensified hydraulic cylinder 550, the bacteria liquid nozzle 570 is arranged at the other end of the connecting seat 551, and the connecting seat 551 is in threaded connection with the bacteria liquid nozzle 570. The upper end of the bacteria liquid nozzle 570 is communicated with a bacteria liquid cylinder 571, microorganisms in the bacteria liquid cylinder 571 produce urease to decompose urea to generate carbonate ions and ammonium ions, and calcium carbonate is generated under the condition that calcium ions exist in soil, so that soil particles are cemented, and the bearing capacity, rigidity and anti-erosion performance of a foundation are improved.
According to the supporting radius of the periphery of the pressure-bearing drill hole, the unfolding radius of the edge scraping tool 520 is controlled through the partial edge expanding hydraulic cylinder 370, the lifting feed of the edge scraping tool 520 is adjusted through the cofferdam hydraulic cylinder 510, and the rotation of the rotating platform 320 is controlled through the cooperation of the rotating motor 340, so that the annular excavation of the soil around the pressure-bearing drill hole by the edge scraping tool 520 is realized. When the edge scraping tool 520 excavates the ring cofferdam, irregular rock soil on the inner wall of the ring cofferdam is formed in a ring mode under the extrusion action of the edge expanding tool 540, and the edge scraping tool 520 and the edge expanding tool 540 stop until the soil impervious layer is excavated.
According to the supporting radius of the inner wall of the annular cofferdam, the spreading radius of the cementing liquid nozzle 560 and the bacterial liquid nozzle 570 is controlled by the partial edge expanding hydraulic cylinder 370, and the lifting and feeding of the cementing liquid nozzle 560 and the bacterial liquid nozzle 570 are controlled by the strengthening hydraulic cylinder 550. And (3) matching with the layer-by-layer excavation of the edge scraping cutter 520 and the edge expanding cutter 540, opening the cementing liquid cylinder 561 and the bacterial liquid cylinder 571, and pouring the bacterial suspension and the urea and CaCl2 solution into the groove of the annular cofferdam so as to enable the bacterial suspension and the urea and CaCl2 solution to leak into the inner part and the outer part of the supporting radius of the periphery of the whole pressure-bearing drill hole. The microorganisms produce urease to decompose urea to generate carbonate ions and ammonium ions, and calcium carbonate is generated under the condition that calcium ions exist in soil, so that soil particles are cemented, and the bearing capacity, rigidity and erosion resistance of the foundation are improved. Through to the interior slip casting of cofferdam, form the protection of pressure-bearing ring layer, cooperate MICP's microorganism soil calcification, carry out intensity support to the pressure-bearing drilling jointly, slip casting can effectively reduce inside calcium carbonate granule of soil that outside soil and water infiltration exchange caused simultaneously and the acid-base change of microorganism living environment, maintains MICP microorganism soil calcification's intensity stability.
As shown in fig. 2-6, in the conventional MICP grouting technology, a bacterial suspension and a cementing liquid are applied to a soil submerged layer through a porous pipeline, the cementing condition of deep soil particles is difficult to detect, and particularly, the penetration influence of a pressure-bearing water layer causes poor soil particle cementing and cement mortar solidification effects and unsatisfactory hole sealing effects.
The detection strengthening assembly 700 includes a top pressure hydraulic cylinder 710, a top pressure detection body 720, a ring wall hydraulic cylinder 730, a rotation motor 740, and a ring wall detection body 750. The cylinder body of the top pressure hydraulic cylinder 710 is symmetrically arranged on the edge expanding platform 310, the cylinder body of the top pressure hydraulic cylinder 710 is provided with a support frame 711, the support frame 711 is fixed on the edge expanding platform 310, and the support frame 711 is respectively in threaded connection with the top pressure hydraulic cylinder 710 and the edge expanding platform 310. The top pressure detecting body 720 is disposed at one end of a piston rod of the top pressure hydraulic cylinder 710, and the top pressure detecting body 720 is screwed with the top pressure hydraulic cylinder 710. The cylinder body of the annular wall hydraulic cylinder 730 is uniformly arranged on one group of the edge expanding sliding frames 360, and the annular wall hydraulic cylinder 730 is in threaded connection with the edge expanding sliding frames 360. The body of the rotary motor 740 is arranged at one end of the piston rod of the circular wall hydraulic cylinder 730, one end of the piston rod of the circular wall hydraulic cylinder 730 is provided with a support 731, the body of the rotary motor 740 is fixed on the support 731, and the support 731 is respectively in threaded connection with the circular wall hydraulic cylinder 730 and the rotary motor 740. The annular wall detection main body 750 is disposed at an output end of the rotary motor 740, and the annular wall detection main body 750 is screwed with the rotary motor 740.
The expansion radius of the annular wall detection main body 750 is controlled by the partial edge expanding hydraulic cylinder 370, the lifting and feeding of the annular wall detection main body 750 is controlled by the annular wall hydraulic cylinder 730, the detection surface of the annular wall detection main body 750 is controlled by the rotary motor 740, the rotation of the rotary table 320 is controlled by the rotary motor 340 in a matching mode, the deep soil calcification on the inner wall of the cofferdam is detected in all directions, the calcification supplement is performed on a local soil layer by controlling the cementing liquid nozzle 560 and the bacterial liquid nozzle 570 in time, the calcification effect of the soil around a pressure-bearing drilling hole is improved, and the influence of the permeation of pressure-bearing water on the calcification dilution of the local soil effect is reduced. The jacking hydraulic cylinder 710 is used for controlling the jacking detection main body 720 to fall down to perform soil calcification detection on the drilling area of the grouting drill rod 170, and the detection of the inner wall of the cofferdam is matched to realize the omnibearing detection of soil calcification in the pressure-bearing drilling area, reduce the detection dead angle and improve the engineering quality.
As shown in fig. 1 to 6, the apparatus for sealing a MICP-based bearing borehole according to an embodiment of the present application includes the following methods:
adjusting the angle of a drilling platform, controlling the rotation and lifting feeding of a drill rod through a motor until the drill rod is drilled into a pressure-bearing underground water layer, then stopping the drilling, mounting a flexible cup-shaped plug at the bottom of the drill hole to partially stop water, backfilling sandy soil with a certain gradation into the drill hole, mounting a hole sealing device, performing grouting and backflow water seepage operations in the drill hole until no water seeps out from the drill hole, and finishing hole sealing;
the excavation radius and lifting feeding of a cutter are controlled hydraulically, the rotation of the excavation cutter around a drill rod is controlled by a motor, the soil is excavated layer by layer, bacterial suspension, urea and CaCl2 solution are filled into an excavation ring groove, microorganisms are induced to generate urease to decompose the urea to generate carbonate ions and ammonium ions, and calcium carbonate is generated under the condition that calcium ions exist in the soil, so that soil particles are cemented, and the bearing capacity, rigidity and anti-erosion performance of a foundation are improved;
carry out calcification through detection device to digging the deep layer of ring inslot wall soil and detect, carry out calcification through detection device and detect to the bull stick region. The soil calcification omnibearing detection in the pressure-bearing drilling area is carried out in real time, the detection dead angle is reduced, the rework is carried out in time, and the engineering quality is improved. After the detection is qualified, the pressure-bearing ring layer protection is formed by grouting into the ring groove, the strength support is carried out on the pressure-bearing drill hole together by matching with the microbial soil calcification of the MICP, the loss of calcium carbonate particles in the soil and the acid-base change of the microbial living environment caused by external water and soil permeation exchange are reduced, and the strength stability of the MICP microbial soil calcification is maintained.
Specifically, the pressure-bearing drilling and hole sealing device and method based on the MICP have the working principle that: the device is moved to a pressure-bearing drilling hole sealing area, and the balance seat 111 is externally hung with a balance device to adjust the drilling angle of the grouting drill rod 170. The rotation of the grouting drill rod 170 is controlled through the drilling motor 180, and the drilling feed of the grouting drill rod 170 is controlled by matching with the jacking motor 160, so that the pressure-bearing drilling of soil is realized. And stopping after the drill bit of the grouting drill rod 170 drills into the pressure-bearing underground water layer. And installing a flexible cup-shaped plug at the bottom of the drill hole to partially stop water, backfilling sandy soil with a certain gradation into the drill hole, installing a hole sealing device, and performing grouting and backflow water seepage operations into the drill hole until no water seeps out from the drill hole, thus finishing hole sealing.
According to the supporting radius of the periphery of the pressure-bearing drill hole, the unfolding radius of the edge scraping tool 520 is controlled through the partial edge expanding hydraulic cylinder 370, the lifting feed of the edge scraping tool 520 is adjusted through the cofferdam hydraulic cylinder 510, and the rotation of the rotating platform 320 is controlled through the cooperation of the rotating motor 340, so that the annular excavation of the soil around the pressure-bearing drill hole by the edge scraping tool 520 is realized. When the edge scraping tool 520 excavates the ring cofferdam, irregular rock soil on the inner wall of the ring cofferdam is formed in a ring mode under the extrusion action of the edge expanding tool 540, and the edge scraping tool 520 and the edge expanding tool 540 stop until the soil impervious layer is excavated.
Further, according to the supporting radius of the inner wall of the annular cofferdam, the spreading radius of the cementing liquid nozzle 560 and the bacterial liquid nozzle 570 is controlled by the partial edge expanding hydraulic cylinder 370, and the lifting and feeding of the cementing liquid nozzle 560 and the bacterial liquid nozzle 570 are controlled by the strengthening hydraulic cylinder 550. And (3) matching with the layer-by-layer excavation of the edge scraping cutter 520 and the edge expanding cutter 540, opening the cementing liquid cylinder 561 and the bacterial liquid cylinder 571, and pouring the bacterial suspension and the urea and CaCl2 solution into the groove of the annular cofferdam so as to enable the bacterial suspension and the urea and CaCl2 solution to leak into the inner part and the outer part of the supporting radius of the periphery of the whole pressure-bearing drill hole. The microorganisms produce urease to decompose urea to generate carbonate ions and ammonium ions, and calcium carbonate is generated under the condition that calcium ions exist in soil, so that soil particles are cemented, and the bearing capacity, rigidity and erosion resistance of the foundation are improved. Through to grouting in the cofferdam, form the protection of bearing ring layer, cooperate MICP's microorganism soil calcification, carry out intensity support to the bearing drilling jointly, grouting in the cofferdam can effectively reduce inside calcium carbonate granule loss and the microorganism living environment acid-base change of soil that outside water and soil infiltration exchange caused simultaneously, maintains MICP microorganism soil calcification's intensity stability.
In addition, the expansion radius of the annular wall detection main body 750 is controlled by the partial edge expanding hydraulic cylinder 370, the lifting and feeding of the annular wall detection main body 750 are controlled by the annular wall hydraulic cylinder 730, the detection surface of the annular wall detection main body 750 is controlled by the rotary motor 740, the rotation of the rotary table 320 is controlled by matching with the rotary motor 340, the calcification of deep soil on the inner wall of the cofferdam is detected in all directions, the calcification supplement is carried out on local soil layers by controlling the cementing liquid nozzle 560 and the bacteria liquid nozzle 570 in time, the calcification supplement effect of the soil around the pressure-bearing drill hole is improved, and the influence of the infiltration of pressure-bearing water on the calcification dilution of the local soil effect is reduced. The jacking hydraulic cylinder 710 is used for controlling the jacking detection main body 720 to fall down to perform soil calcification detection on the drilling area of the grouting drill rod 170, and the detection of the inner wall of the cofferdam is matched to realize the omnibearing detection of soil calcification in the pressure-bearing drilling area, reduce the detection dead angle and improve the engineering quality.
It should be noted that the specific model specifications of the jacking motor 160, the drilling motor 180, the rotating motor 340, the edge expanding hydraulic cylinder 370, the cofferdam hydraulic cylinder 510, the strengthening hydraulic cylinder 550, the jacking hydraulic cylinder 710, the jacking detecting body 720, the ring wall hydraulic cylinder 730, the rotating motor 740, and the ring wall detecting body 750 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, and therefore, detailed description is omitted.
The power supply and the principle of the jacking motor 160, the drilling motor 180, the rotating motor 340, the edge expanding hydraulic cylinder 370, the cofferdam hydraulic cylinder 510, the strengthening hydraulic cylinder 550, the top pressure hydraulic cylinder 710, the top pressure detecting body 720, the ring wall hydraulic cylinder 730, the rotating motor 740 and the ring wall detecting body 750 are clear to those skilled in the art and will not be described in detail herein.
The above embodiments are merely examples of the present application and are not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (10)
1. A pressure-bearing drilling hole sealing device based on MICP is characterized by comprising
The foundation drilling assembly (100) comprises a foundation table (110), a jacking table (120), jacking guide rods (130), jacking guide screws (140), a drilling table (150), a jacking motor (160), grouting drill rods (170) and a drilling motor (180), wherein the jacking table (120) is symmetrically arranged above the foundation table (110), the jacking guide rods (130) are uniformly arranged between the foundation table (110) and the jacking table (120), the jacking guide screws (140) are symmetrically and rotatably connected between the foundation table (110) and the jacking table (120), two ends of the drilling table (150) are transmitted to the surfaces of the jacking guide screws (140), the drilling table (150) is slidably sleeved on the surfaces of the jacking guide rods (130), the jacking motor (160) is arranged on the jacking table (120), and the output end of the jacking motor (160) is transmitted to the upper end of the jacking guide screw (140), the upper end of the grouting drill rod (170) rotates in the drilling platform (150), the body of the drilling motor (180) is arranged on the drilling platform (150), and the output end of the drilling motor (180) is transmitted to the upper end of the grouting drill rod (170);
expand limit and strengthen subassembly (300), expand limit and strengthen subassembly (300) including expanding limit platform (310), revolving stage (320), rotatory pinion shaft (330), rotating electrical machines (340), expand limit rail frame (350), expand limit carriage (360) and expand limit pneumatic cylinder (370), expand limit platform (310) hang in base platform (110) below, revolving stage (320) rotate connect in expand limit platform (310) bottom, rotatory pinion shaft (330) symmetry rotate connect in base platform (110) below, rotatory pinion shaft (330) lower extreme meshing in revolving stage (320) surface, rotating electrical machines (340) fuselage hang in base platform (110) below, rotating electrical machines (340) output transmission in rotatory pinion shaft (330) upper end, expand limit rail frame (350) and evenly set up revolving stage (320) week side, expand limit carriage (360) slide in expand limit rail frame (350) surface, the cylinder body of the edge-expanding hydraulic cylinder (370) is arranged on the edge-expanding sliding frame (360), and one end of the piston rod of the edge-expanding hydraulic cylinder (370) is fixed on the edge-expanding rail frame (350).
2. The MICP-based pressure-bearing drilling and sealing device according to claim 1, wherein the top of the base platform (110) is uniformly provided with the balance seat (111), the bottom of the base platform (110) is uniformly provided with the suspension column (112), and the edge expanding platform (310) is fixed at the lower end of the suspension column (112).
3. The MICP-based pressure-bearing drilling and sealing device according to claim 1, wherein a first swivel base (113) is symmetrically arranged on the base platform (110), a second swivel base (121) is arranged at the bottom of the jacking platform (120), and two ends of the jacking screw rod (140) are rotatably connected between the first swivel base (113) and the second swivel base (121).
4. The MICP-based pressure-bearing borehole sealing device according to claim 1, wherein a sliding guide sleeve (151) is uniformly arranged on the drill platform (150), and the sliding guide sleeve (151) is slidably sleeved on the surface of the jacking guide rod (130).
5. The MICP-based pressure-bearing drilling and sealing device according to claim 1, wherein a first belt wheel (181) is arranged at the output end of the drilling motor (180), a second belt wheel (171) is arranged at the upper end of the grouting drill rod (170), and the first belt wheel (181) is driven to the second belt wheel (171).
6. The MICP-based confined borehole sealing device according to claim 1, wherein screw nuts (152) are arranged at both ends of the drilling platform (150), and the screw nuts (152) are driven on the surface of the jacking screw (140).
7. A MICP-based confined borehole sealing apparatus according to claim 1, characterized in that a rotary gear ring (321) is provided in said rotary table (320), a rotary gear (331) is provided at the lower end of said rotary gear shaft (330), and said rotary gear (331) is engaged with said rotary gear ring (321).
8. The MICP-based confined borehole sealing device according to claim 1, wherein a suspension seat (332) is rotatably arranged around the rotating gear shaft (330), the suspension seat (332) is suspended at the bottom of the base table (110), and the body of the rotating motor (340) is fixed on the suspension seat (332).
9. The MICP-based confined borehole sealing device according to claim 1, wherein a third belt wheel (341) is fixed at the output end of the rotating motor (340), a fourth belt wheel (333) is fixed at the upper end of the rotating gear shaft (330), and the third belt wheel (341) is driven by the fourth belt wheel (333).
10. A pressure-bearing drilling hole sealing device and method based on MICP, which utilizes the pressure-bearing drilling hole sealing device based on MICP of any one of claims 1-9, characterized by comprising the following steps:
adjusting the angle of a drilling platform, controlling the rotation and lifting feeding of a drill rod through a motor until the drill rod is drilled into a pressure-bearing underground water layer, then stopping the drilling, mounting a flexible cup-shaped plug at the bottom of the drill hole to partially stop water, backfilling sandy soil with a certain gradation into the drill hole, mounting a hole sealing device, performing grouting and backflow water seepage operations in the drill hole until no water seeps out from the drill hole, and finishing hole sealing;
the excavation radius and lifting feeding of a cutter are controlled hydraulically, the rotation of the excavation cutter around a drill rod is controlled by a motor, the soil is excavated layer by layer, bacterial suspension, urea and CaCl2 solution are filled into an excavation ring groove, microorganisms are induced to generate urease to decompose the urea to generate carbonate ions and ammonium ions, and calcium carbonate is generated under the condition that calcium ions exist in the soil, so that soil particles are cemented, and the bearing capacity, rigidity and anti-erosion performance of a foundation are improved;
carry out calcification through detection device to digging the deep detection that calcifies of ring inslot wall soil, carry out calcification through detection device to the bull stick region and detect, carry out all-round detection to the regional soil calcification of pressure-bearing drilling in real time, reduce and detect the dead angle, in time rework, improve engineering quality, detect qualified back, through slip casting in to the ring recess, form the protection of pressure-bearing ring layer, the microorganism soil calcification of cooperation MICP, carry out intensity support to the pressure-bearing drilling jointly, reduce inside calcium carbonate granule of soil that outside soil and water infiltration exchange caused and the acid-base change of microorganism living environment, maintain MICP microorganism soil calcified intensity stability.
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| CN202111665812.4A CN114458152A (en) | 2021-12-31 | 2021-12-31 | Pressure-bearing drilling and sealing device and method based on MICP |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115749667A (en) * | 2022-11-16 | 2023-03-07 | 西北大学 | Oil well water plugging combined tool and plugging method based on MICP |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115749667A (en) * | 2022-11-16 | 2023-03-07 | 西北大学 | Oil well water plugging combined tool and plugging method based on MICP |
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