CN116335115A - Liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology - Google Patents
Liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology Download PDFInfo
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- CN116335115A CN116335115A CN202310147694.0A CN202310147694A CN116335115A CN 116335115 A CN116335115 A CN 116335115A CN 202310147694 A CN202310147694 A CN 202310147694A CN 116335115 A CN116335115 A CN 116335115A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000004576 sand Substances 0.000 title claims abstract description 34
- 238000005516 engineering process Methods 0.000 title claims abstract description 22
- 101000965313 Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513) Aconitate hydratase A Proteins 0.000 title claims abstract 12
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 244000005700 microbiome Species 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 21
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 16
- 239000004202 carbamide Substances 0.000 claims description 16
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 14
- 239000001110 calcium chloride Substances 0.000 claims description 11
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 10
- 239000003380 propellant Substances 0.000 claims description 9
- 238000009629 microbiological culture Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 4
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 4
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 4
- 229940041514 candida albicans extract Drugs 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 4
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012138 yeast extract Substances 0.000 claims description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 11
- 230000002787 reinforcement Effects 0.000 abstract description 8
- 239000002002 slurry Substances 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000813 microbial effect Effects 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- 239000007853 buffer solution Substances 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000002308 calcification Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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- 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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology, which belongs to the field of soft soil foundation treatment, and comprises the following steps: s1: determining the position and depth range of a foundation to be treated, and drilling holes at preset point positions; s2: placing the grouting sleeve into the borehole; s3: the high-energy gas generator and the packer are sequentially hung into the grouting sleeve, and are fixedly installed, a power supply is introduced to ignite the high-energy gas generating device to release high-energy gas, and after the release of the high-energy gas is completed, the packer and the high-energy gas generating device are recovered; s4: injecting microorganism liquid and cementing liquid into the grouting sleeve; s5: after grouting is finished, sand is backfilled into each drilling hole and compacted. The method is simple, has obvious curing effect, good mechanical property and low engineering cost, and can effectively solve the problems of insufficient slurry diffusion distance and unobvious foundation reinforcement.
Description
Technical Field
The invention belongs to the field of soft soil foundation treatment, and particularly relates to a liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology.
Background
Along with the continuous promotion of the construction of the infrastructure in China, the reinforcement treatment of the soft foundation becomes an unavoidable topic in the engineering field, and is also an important method for geotechnical engineering research. Under the action of dynamic loads such as earthquakes, the sandy soil can generate liquefaction effect, the bearing capacity of the foundation is rapidly reduced, and the damage is huge. Based on the problems, the problems of vibration liquefaction of the sand foundation are solved by adopting the dynamic compaction method, the replacement filling method, the reinforcement method and other crimes in engineering. However, the method has the problems of limited construction, high requirements on sites, large numbers of personnel and mechanical equipment, high manufacturing cost, unsatisfactory foundation reinforcement effect, environmental pollution and the like.
In recent years, with the continuous development of a microorganism-induced calcium carbonate deposition (MICP) technology, research on microorganisms in reinforcing a rock-soil body is increasingly paid attention to, and by pouring microorganism liquid and cementing solution (mixed liquid of urea and calcium chloride) into a sand foundation to be treated, calcium carbonate precipitates induced by the microorganisms are enabled to glue sand particles into a whole and fill sand gaps, so that the overall mechanical property of the foundation is improved, and the adverse effect of sand liquefaction under the action of vibration load is effectively reduced. Compared with the driven soil body reinforcing method, the MICP technology has the advantages of simple operation, small grouting pressure, small disturbance, short construction period, obvious reinforcing effect, environmental protection, and the like. However, when the MICP technology is applied to the treatment of the liquefied sand foundation in the actual engineering, the slurry is more and more difficult to enter the stratum along with the increase of the reinforcement depth, so that the diffusion distance of the slurry is insufficient, and the reinforcement effect is not obvious.
Disclosure of Invention
In view of the above, in order to solve the problems of insufficient slurry diffusion distance and unobvious foundation reinforcement in the microorganism grouting technology in the prior art, the invention provides a liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology, which is simple, obvious in curing effect, good in mechanical property and low in engineering cost.
The invention is realized by the following technical scheme:
the liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology comprises the following steps:
s1: determining the position and depth range of a foundation to be treated, and drilling holes at preset point positions;
s2: placing the grouting sleeve into the borehole;
s3: the high-energy gas generator and the packer are sequentially hung into the grouting sleeve, and are fixedly installed, a power supply is introduced to ignite the high-energy gas generating device to release high-energy gas, and after the release of the high-energy gas is completed, the packer and the high-energy gas generating device are recovered;
s4: injecting microorganism liquid and cementing liquid into the grouting sleeve;
s5: after grouting is finished, sand is backfilled into each drilling hole and compacted.
Further, in step S3, the high-energy gas generating device is composed of a sleeve, a liquid propellant, a gas leakage hole and a high-voltage cable; the gas leakage hole is arranged on the wall of the sleeve, the liquid propellant is filled in the sleeve, the sleeve is connected with control equipment on the ground through a high-voltage cable, and each cable is independently connected with a controller.
Further, in step S3, the packer is an expanding hydraulic packer, and a small Kong Gongdian cable is arranged in the middle to pass through.
Further, in step S3, a high-energy gas generating device is installed in the grouting sleeve in a mode of spacing a hole, the high-voltage cable is marked on the ground, the generating device is slowly placed in the grouting sleeve manually according to the marked depth, and when the depth reaches the marked point, the high-voltage cable is stopped to be placed down and fixed.
In step S3, the packer is arranged at the position 0.5-1 m above the high-energy gas generating device, and the upper part and the lower part are separated through hydraulic drive to ensure that the high-energy gas is emitted to act on the soil body in the approximately horizontal direction.
In step S4, the microorganism liquid is prepared by mixing the strains and the microorganism culture liquid in equal volumes.
Further, the strain is bacillus pasteurizus in a strain library; the microbial culture solution consists of 10-20 g/L of ammonium chloride, 10-15 g/L of urea, 15-20 g/L of yeast extract, 0.01-0.02 g/L of manganese sulfide and 0.02-0.3 g/L of nickel chloride, and when the microbial culture solution is prepared, the pH value of the microbial culture solution is regulated to be=9 by using a buffer solution.
Further, in step S4, the cementing liquid is a mixed solution of urea and calcium chloride, and the volume ratio of urea to calcium chloride is 1: (0.5-2), the concentration of urea is 1 mol/L-3 mol/L, and the concentration of calcium ions in the calcium chloride solution is 0.5 mol/L-2 mol/L.
Further, in step S4, the grouting process is as follows: and injecting the microbial solution into the grouting sleeve through the grouting hose under the action of the plunger pump, wherein the grouting speed is 10-20L/min, and the grouting time lasts for 15-30 min. After microorganism liquid is injected for 2-3 h, cementing liquid is pumped into the grouting sleeve under the action of a plunger pump, the grouting speed is 20-40L/min, and the grouting time lasts for 2-3 h.
Further, a sealing gasket is arranged at the air leakage hole of the high-energy gas generating device to prevent the leakage of the liquid propellant or the explosion caused by collision with the pipe wall in the process of lowering.
Compared with the prior art, the invention has the following technical effects:
the invention combines high-energy gas fracturing and microorganism grouting reinforcement to finish the treatment of the liquefied sand foundation, firstly, a high-energy gas generating device burns in the generating device through a propellant to generate pulse loading and control the pressure rising speed, so that released high-temperature and high-pressure gas acts on a target soil layer, the foundation soil generates a longer multi-crack system, more natural micro-cracks in the soil body are communicated, and a complex crack network is formed; and then injecting microorganism liquid and cementing liquid into the grouting sleeve, wherein the microorganism liquid enters the deep part of the soil layer through a crack network formed in the high-energy gas fracturing effect, and the microorganisms in the microorganism liquid undergo calcification reaction to glue soil particles into a whole, so that the stability of the soil particles under the action of dynamic load is improved.
The invention has low cost, less applied mechanical equipment, simple operation, small environmental impact, good curing effect and mechanical property, can obviously reduce the adverse effect of liquefaction of the sandy soil foundation, improve the bearing capacity of the foundation and further achieve the effect of reinforcing the foundation.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Fig. 2 is a schematic structural diagram of the high-energy gas fracturing of the present invention.
Fig. 3 is a schematic view of a vent hole in the high-energy gas generator of the present invention.
Fig. 4 is a schematic view of a drilling arrangement of the present invention.
The drawings show that the device comprises a 1-grouting sleeve, 2-miscellaneous filling soil, a 3-packer, 4-grouting holes, a 5-sand layer, a 6-cushion block, a 7-high-voltage cable, an 8-high-energy gas generating device, 9-venting holes, 10-pipe walls and 11-sealing gaskets.
Detailed Description
For a better understanding of the present invention, the following examples are further illustrative of the present invention, but the present invention is not limited to the following examples, and the scope of the present invention is not limited thereto.
The reagents and materials described in the embodiments described below are conveniently available unless otherwise specified.
Example 1
Referring to fig. 1-4, the present embodiment provides a liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology, comprising the following steps:
s1: determining the position and depth range of a foundation to be treated, installing a drilling machine at a pre-surveyed position, and assisting in manually matching the drilling machine with a sand layer 5 to drill holes and install a grouting sleeve 1;
as shown in fig. 2 and 4, the drilling machine is a YG-2 shallow engineering driller, the diameter of the drilling holes is 110-150 mm, the distance between the drilling holes is 3-5 m, and the drilling holes are arranged in a quincuncial shape; the grouting sleeve 1 is an aluminum alloy sleeve with the diameter of 108mm, the compression resistance is good, the length of the grouting sleeve 1 is 6-10 m, the conical part at the lower end is closed, grouting holes with the diameter of 8-10 mm are distributed on the pipe, and the hole distance is 25-30 mm.
In addition, after the grouting sleeve 1 is hung into a drill hole, a rubber plug and a cushion block 6 are arranged, so that the stability of the grouting sleeve 1 is improved.
S2: the high-energy gas generating device 8 and the packer 3 are sequentially hung into the grouting sleeve 1 and are fixedly installed, the power supply is introduced to ignite the high-energy gas generating device 8 to release high-energy gas, and after the high-energy gas reaction of the last hole is completed, the packer 3 and the high-energy gas generating device 8 in each hole are sequentially hung out of the sleeve for recycling.
As shown in fig. 2 and 3, the high-energy gas generating device 8 mainly comprises a sleeve, a liquid propellant, a gas leakage hole 9 and a high-voltage cable 7. The length of the generating device is 3-4 m, the outer diameter is 89mm, the liquid propellant is filled in the generating device, the wall 10 of the sleeve is provided with a gas leakage hole 9 in a 16-hole/m mode, and the diameter of the gas leakage hole is 5-10 mm; the high-energy gas generating device 8 is connected with control equipment on the ground by adopting a high-voltage cable 7, and each cable is independently connected with a controller; the high-energy gas generating device 8 is manually arranged in the grouting sleeve in a mode of spacing holes, after the arrangement is completed, the high-voltage cable 7 is electrified with alternating current, so that the high-energy gas generating device 8 generates explosion reaction to generate high-temperature high-pressure gas, and the high-pressure gas enters the soil layer through holes of the pipe wall 10 to be subjected to fracturing and expanding, and the occurrence time interval of each drilling device in the crack is 5-10 min;
the packer 3 adopts a hydraulic packer, the packer 3 is arranged at the position 0.5-1 m above the high-energy gas generating device, a small Kong Gongdian cable is arranged in the middle to pass through, and the packer 3 separates the upper part and the lower part through hydraulic drive to ensure that the high-energy gas is emitted to act on soil in the approximately horizontal direction.
For soil layers with different distribution depths, marks corresponding to the lowering depths are made on the high-voltage cable 7, a generating device is slowly hung into the grouting sleeve 1 by manual cooperation with a machine, and when the depths reach the marking points, the lowering is stopped and the high-voltage cable 7 is fixed.
In addition, a sealing gasket is arranged at the air leakage hole,
s4: and injecting microorganism liquid and cementing liquid into the grouting sleeve to finish grouting solidification.
The microbial liquid is prepared by mixing strains and a microbial culture liquid in equal volume. In the embodiment, the microorganism is selected from the bacillus pasteurizer in the strain library, each liter of the microorganism culture solution contains 10-20 g of calcium chloride, 10-15 g of urea, 15-20 g of yeast extract, 0.01-0.02 g of manganese sulfide and 0.02-0.3 g of nickel chloride, and the buffer solution is added into the culture solution until the pH=9.
The cementing liquid is a mixed solution of urea and calcium chloride, and the volume ratio of the urea to the calcium chloride is 1: (0.5-2), the concentration of urea is 1 mol/L-3 mol/L, and the concentration of calcium ions in the calcium chloride solution is 0.5 mol/L-2 mol/L.
After the grouting material is prepared, starting a grouting process, wherein the grouting process comprises the following steps: injecting a microbial solution into the grouting sleeve 1 through a grouting hose under the action of a plunger pump, wherein the grouting speed is 10-20L/min, and the grouting time lasts for 15-30 min; after microorganism liquid is injected for 2-3 h, cementing liquid is pumped into the grouting sleeve 1 under the action of a plunger pump, the grouting speed is 20-40L/min, and the grouting time lasts for 2-3 h. The grouting process is circulated for 1 time at intervals of 12 hours and is repeated for 2 to 3 times.
S5: the grouting process is repeated for 2-3 times at intervals of 12h for 1 time, and after grouting is finished, each drilling hole is backfilled with sand and compacted manually.
Example 2
The embodiment provides a liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology, which is particularly applicable to deeper liquefied sand layers distributed above 5m from the ground surface, and comprises the following steps:
s1: installing drilling machinery at a pre-survey position, and assisting in manually matching with the sand layer 5 to drill holes and install the grouting sleeve 1;
as shown in fig. 2 and 4, drilling holes with diameters of 110-150 mm by using a YG-2 shallow engineering driller, wherein the distance between the drilling holes is set to be 3 meters, and the drilling holes are arranged in a quincuncial shape; the grouting sleeve 1 is an aluminum alloy sleeve with the diameter of 108mm, the length of the grouting sleeve 1 is 10m, the conical part at the lower end is closed, grouting holes with the diameter of 10mm are distributed on the pipe, and the hole distance is 25mm.
In addition, after the grouting sleeve 1 is hung into a drill hole, a rubber plug and a cushion block 6 are arranged, so that the stability of the grouting sleeve 1 is improved.
S2: the high-energy gas generating device 8 and the packer 3 are sequentially hung into the grouting sleeve 1 and are fixedly installed, the power supply is introduced to ignite the high-energy gas generating device 8 to release high-energy gas, and after the high-energy gas reaction of the last hole is completed, the packer 3 and the high-energy gas generating device 8 in each hole are sequentially hung out of the sleeve for recycling.
As shown in fig. 2 and 3, the high-energy gas generating device is 3m long, 89mm in outer diameter, liquid propellant is filled in the high-energy gas generating device, the wall 10 of the sleeve is provided with a gas leakage hole 9 in a mode of 16 holes/m, and the diameter of the gas leakage hole is 10mm; the high-energy gas generating device 8 is connected with control equipment on the ground by adopting a high-voltage cable 7, and each cable is independently connected with a controller; the high-energy gas generating device 8 is manually arranged in the grouting sleeve in a mode of spacing a hole, after the arrangement is completed, the high-voltage cable 7 is electrified with alternating current, so that the high-energy gas generating device 8 generates explosion reaction to generate high-temperature high-pressure gas, the high-pressure gas enters a soil layer through a hole of the pipe wall 10 to be subjected to fracturing and expanding cracks, and each drilling device generates a time interval of 5-10 min;
the packer 3 adopts a hydraulic packer, the packer 3 is arranged at the position 0.5-1 m above the high-energy gas generating device, a small Kong Gongdian cable is arranged in the middle to pass through, and the packer 3 separates the upper part and the lower part through hydraulic drive to ensure that the high-energy gas is emitted to act on soil in the approximately horizontal direction.
And (3) making a mark corresponding to the lowering depth on the high-voltage cable 7, slowly hanging the generating device into the grouting sleeve 1 by manually matching with a machine, stopping lowering and fixing the high-voltage cable 7 when the depth reaches a mark point.
In addition, a sealing gasket is arranged at the air leakage hole,
s4: and injecting microorganism liquid and cementing liquid into the grouting sleeve to finish grouting solidification.
The microbial liquid is prepared by mixing strains and a microbial culture liquid in equal volume. In this example, the microorganism selected from the group consisting of Bacillus pasteurisus in the stock culture was a microorganism culture broth containing 20g of calcium chloride, 15g of urea, 0.02g of manganese sulfide and 0.03g of nickel chloride per liter of yeast extract, and a buffer solution was added to the culture broth to pH=9.
The cementing liquid is a mixed solution of urea and calcium chloride, and the volume ratio of the urea to the calcium chloride is 1:1, the concentration of urea is 2mol/L, and the concentration of calcium ions in the calcium chloride solution is 2mol/L.
After the grouting material is prepared, starting a grouting process, wherein the grouting process comprises the following steps: injecting a microbial solution into the grouting sleeve 1 through a grouting hose under the action of a plunger pump, wherein the grouting speed is 10L/min, and the grouting time lasts for 30min; after microorganism liquid is injected for 3 hours, cementing liquid is pumped into the grouting sleeve 1 under the action of a plunger pump, and the grouting speed is 30L/min, and the grouting time lasts for 3 hours. The grouting process is cycled 1 time and repeated 3 times at intervals of 12 hours.
S5: the grouting process is repeated for 3 times at intervals of 12 hours for 1 time, and after grouting is finished, each drilling hole is backfilled with sand and compacted manually.
The above description is only a few examples of the present invention and is not intended to limit the embodiments and the protection scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious changes made by the content of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The liquefied sand foundation treatment method combining high-energy gas fracturing and MICP technology is characterized by comprising the following steps of:
s1: determining the position and depth range of a foundation to be treated, and drilling holes at preset point positions;
s2: placing the grouting sleeve into the borehole;
s3: the high-energy gas generator and the packer are sequentially hung into the grouting sleeve, and are fixedly installed, a power supply is introduced to ignite the high-energy gas generating device to release high-energy gas, and after the release of the high-energy gas is completed, the packer and the high-energy gas generating device are recovered;
s4: injecting microorganism liquid and cementing liquid into the grouting sleeve;
s5: after grouting is finished, sand is backfilled into each drilling hole and compacted.
2. The method for treating a liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 1, wherein in the step S3, the high-energy gas generating device consists of a sleeve, a liquid propellant, a gas leakage hole and a high-voltage cable; the gas leakage hole is arranged on the wall of the sleeve, the liquid propellant is filled in the sleeve, the sleeve is connected with control equipment on the ground through a high-voltage cable, and each cable is independently connected with a controller.
3. The method for treating the liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 2, wherein in the step S3, the packer is an expanding hydraulic packer, and a small Kong Gongdian cable is arranged in the middle.
4. The method for treating a liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 2, wherein in step S3, a high-energy gas generating device is installed in the grouting sleeve by means of spacing one hole.
5. A method for treating a liquefied sand foundation by combining high-energy gas fracturing with the MICP technology according to claim 3, wherein in step S3, a packer is installed at 0.5 to 1m above the high-energy gas generating device.
6. The method for treating a liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 1, wherein in the step S4, the microorganism liquid is formed by mixing the strains and the microorganism culture liquid in equal volumes.
7. The method for treating the liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 6, wherein the strain is bacillus pasteurizus in a strain library; the microbial culture solution consists of 10-20 g/L ammonium chloride, 10-15 g/L urea, 15-20 g/L yeast extract, 0.01-0.02 g/L manganese sulfide and 0.02-0.3 g/L nickel chloride.
8. The method for treating a liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 1, wherein in the step S4, the cementing liquid is a mixed solution of urea and calcium chloride, and the volume ratio of urea to calcium chloride is 1: (0.5-2).
9. The method for treating a liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 1, wherein in the step S4, the grouting process is as follows: injecting microorganism liquid into the grouting sleeve through a grouting hose under the action of a plunger pump, wherein the grouting speed is 10-20L/min, and the grouting time lasts for 15-30 min; after microorganism liquid is injected for 2-3 h, cementing liquid is pumped into the grouting sleeve under the action of a plunger pump, the grouting speed is 20-40L/min, and the grouting time lasts for 2-3 h.
10. The method for treating a liquefied sand foundation by combining high-energy gas fracturing and MICP technology according to claim 2, wherein a sealing gasket is arranged at the gas release hole of the high-energy gas generating device.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1181294A (en) * | 1997-09-11 | 1999-03-26 | Ohbayashi Corp | Ground improvement method |
| JPH11241335A (en) * | 1998-02-25 | 1999-09-07 | Raito Kogyo Co Ltd | Method for establishing horizontal permeable layer, and construction method for improving soft ground |
| DE10232174A1 (en) * | 2002-07-16 | 2004-02-05 | Keller Grundbau Gmbh | Injection system introducing medium into ground via borehole during e.g. tunneling, includes external puller unit for packer under automatic control |
| CN102878874A (en) * | 2012-10-09 | 2013-01-16 | 北京科技大学 | Deep-hole pre-splitting blasting grouting method |
| CN103774651A (en) * | 2012-10-26 | 2014-05-07 | 兰州大学 | Olive-shaped anti-slip key grouted anchoring supporting blasting anchor rod |
| CN105350516A (en) * | 2015-09-29 | 2016-02-24 | 李翔宇 | Method for modifying and reinforcing rock and soil layer by injecting materials |
| CN107100162A (en) * | 2017-05-19 | 2017-08-29 | 南京林业大学 | A kind of solid indigenous method of microorganism gas-liquid cycle slip casting |
| CN110100517A (en) * | 2019-05-20 | 2019-08-09 | 成都天本地源科技有限公司 | A kind of material applied deeply suitable for subsoiling suspension conveying and staying method in the soil |
-
2023
- 2023-02-21 CN CN202310147694.0A patent/CN116335115A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1181294A (en) * | 1997-09-11 | 1999-03-26 | Ohbayashi Corp | Ground improvement method |
| JPH11241335A (en) * | 1998-02-25 | 1999-09-07 | Raito Kogyo Co Ltd | Method for establishing horizontal permeable layer, and construction method for improving soft ground |
| DE10232174A1 (en) * | 2002-07-16 | 2004-02-05 | Keller Grundbau Gmbh | Injection system introducing medium into ground via borehole during e.g. tunneling, includes external puller unit for packer under automatic control |
| CN102878874A (en) * | 2012-10-09 | 2013-01-16 | 北京科技大学 | Deep-hole pre-splitting blasting grouting method |
| CN103774651A (en) * | 2012-10-26 | 2014-05-07 | 兰州大学 | Olive-shaped anti-slip key grouted anchoring supporting blasting anchor rod |
| CN105350516A (en) * | 2015-09-29 | 2016-02-24 | 李翔宇 | Method for modifying and reinforcing rock and soil layer by injecting materials |
| CN107100162A (en) * | 2017-05-19 | 2017-08-29 | 南京林业大学 | A kind of solid indigenous method of microorganism gas-liquid cycle slip casting |
| CN110100517A (en) * | 2019-05-20 | 2019-08-09 | 成都天本地源科技有限公司 | A kind of material applied deeply suitable for subsoiling suspension conveying and staying method in the soil |
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