CN106592573A - Freezer-free liquid nitrogen artificial ground freezing method - Google Patents
Freezer-free liquid nitrogen artificial ground freezing method Download PDFInfo
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- CN106592573A CN106592573A CN201611205956.0A CN201611205956A CN106592573A CN 106592573 A CN106592573 A CN 106592573A CN 201611205956 A CN201611205956 A CN 201611205956A CN 106592573 A CN106592573 A CN 106592573A
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- liquid nitrogen
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- stratum
- ascending pipe
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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
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a freezer-free liquid nitrogen artificial ground freezing method and belongs to the technical field of artificial ground freezing. According to the method, construction drilling, namely primary drilling is carried out at first, and then freezing of a drilled hole and the ground surrounding the drilled hole is carried out by inserting a liquid nitrogen injection pipe into the drilled hole; after muddy water in the drilled hole formed through primary drilling and the surrounding ground are frozen, secondary drilling construction is carried out, a stable channel is formed, and liquid nitrogen is injected continuously to achieve ground freezing; and after the range, temperature and strength of frozen soil meet design requirements, liquid nitrogen injection is stopped, and freezing is completed. According to the method, the characteristics of low temperature and quick freezing of the liquid nitrogen are fully used, the ground is frozen in a forced mode, conditions are provided for secondary drilling dry operation, a natural liquid nitrogen heat exchange space is formed in the ground after secondary drilling, the liquid nitrogen makes direct contact with the soil, and higher heat exchange efficiency and higher freezing speed can be obtained. The links of machining, producing and installing traditional freezers are omitted, material is saved, cost is reduced, and the construction progress is improved.
Description
Technical field
The present invention relates to artificial ground freezing technique field, particularly relates to one kind without the artificial Freezing stratum as rapid side of frigo liquid nitrogen
Method.
Background technology
Artificial stratum freezing process is, using artificial cooling technology, the heat displacement in stratum to be walked, so as to reduce stratum temperature
Degree makes stratum become frozen state up to the water freezing in stratum, and the soil body after freezing has certain intensity, can keep out outer
Boundary's Water And Earth Pressures, reach the purpose of water proof and stratum consolidation.According to the difference of refrigerant, artificial stratum freezing process can be divided into biography
The hypothermic saline of system freezes the method such as to freeze with new liquid nitrogen freezing, dry ice.Standard atmosphere depress, liquid nitrogen vaporization temperature for-
196℃.Amount of heat is absorbed during liquid nitrogen vaporization, can be with the quick freezing soil body, compared with Conventional cryogenic brine freezing, freezing speed
Faster, frozen soil temperature is lower, intensity is bigger.With the development of steel and iron industry, as liquid oxygen the liquid nitrogen production of side-product is produced
Increase therewith, price is gradually reduced, the case that liquid nitrogen is applied in artificial Freezing stratum as rapid gradually increases.
Current liquid nitrogen freezer seals also with reference to the frigo method for designing in traditional saline freezing system in bottom
Feed pipe is passed through in the steel pipe for closing, cryogenic liquid flows in steel pipe, so as to take away Formation heat.Such as：Liquid nitrogen freezer (application
Number：200720069041.1), significant difference is had no with traditional hypothermic saline frigo, is remained by freezing pipe, base cone, confession
Liquid pipe and escape pipe are constituted.Similar liquid nitrogen freezer patent is concentrated mainly on the liquid nitrogen feed liquid way improvement side to this frigo
Face, such as " even freezer of shock tube of liquid nitrogen (application number：200720035238.3) ", " stratigraphic liquid nitrogen freezer (application number：
201010000963.3) ", " there is the liquid nitrogen freezer (application number of many feed pipes：201110264991.0) " etc..Its general character
Construction method is：In the earth formation construction drill, lays in the borehole liquid nitrogen freezer, and liquid nitrogen is passed through in frigo, and liquid nitrogen is freezing
Vaporization heat absorption in knot device, and it is changed into nitrogen, discharge from escape pipe.Work progress be related to freezing borehole construction, processing and freezing device,
Frigo is installed, extracting for frigo is may also relate to after the completion of freezing；The processing of frigo further relate to feed pipe, escape pipe,
The processing and connection of base cone, dividing plate etc..
The water shutoff that the artificial Freezing stratum as rapid of liquid nitrogen is usually used in emergency dealing is freezed and soil stabilization, using traditional liquid nitrogen freezing
The drawbacks of device carries out the method for Freezing stratum as rapid and has that operation is more, workpiece is more, wastes time and energy, extremely easy delay is speedily carried out rescue work opportunity.
The present invention provides a kind of without the artificial stratum freezing method of frigo liquid nitrogen, exempts the artificial Freezing stratum as rapid of traditional liquid nitrogen and applies
Frigo processing in work, frigo such as extract at the operation, accelerating construction progress, reduce construction cost.
The content of the invention
The present invention has that operation is more, workpiece is more, time-consuming expense for the method that traditional liquid nitrogen freezer carries out Freezing stratum as rapid
The drawbacks of power, there is provided one kind is without the artificial stratum freezing method of frigo liquid nitrogen.
The method is comprised the following steps that：
(1) construction drill, i.e., once drill：According to stratigraphic type and drilling depth, bore diameter, bore mode is selected,
The drilling in the range of the depth of freezing is formed, and carries out borehole cleaning process, it is ensured that foot of hole scum silica frost thickness is less than 300mm；
(2) drilling and peripheral extent Freezing stratum as rapid：Liquid nitrogen ascending pipe is inserted in drilling, is injected by air relief valve control
The supply pressure of liquid nitrogen and the air-liquid state of supply liquid nitrogen, liquid nitrogen ascending pipe is made up of two parts, and front end is rigid straight pipe, after
Hold as rustless steel flexible hose, using the rig and supporting drilling rod of construction drill, the rigid straight pipe end of liquid nitrogen ascending pipe is inserted
Foot of hole；The depth of liquid nitrogen ascending pipe insertion drilling is measured by run of steel, rigid straight pipe threshold value bottom hole pitch is controlled
From for 300-500mm；Pressure is injected by the valve regulated liquid nitrogen adjusted on liquid nitrogen storage, when initially injecting, low pressure is taken
Power injects gaseous nitrogen, dredging pipeline and pre-cooling pipeline, and injection pressure has continuous air bubbles to emerge to be defined by the top that drills；Incrementally increase
Injection pressure is slowly injected into liquid nitrogen to 0.4-0.6Mpa, and progressively above carries drilling rod using rig, lifts speed controlling in 0.2-
0.4m/min, liquid nitrogen ascending pipe is progressively extracted；When liquid nitrogen ascending pipe will extract drilling, reduce injection pressure, make injection
Liquid nitrogen switchs to gaseous nitrogen；Using drilling rod the insertion of liquid nitrogen ascending pipe is drilled again, the above-mentioned injection process of repetition, when drilling and periphery
100mm scope freezing soils, and when the pore space of formation does not cave in former drilling after liquid nitrogen ascending pipe is extracted, stop liquid nitrogen note
Enter, extract liquid nitrogen ascending pipe；
(3) secondary drilling construction：Muddy water and surrounding formations are dry using auger into frozen state in drilling hole
Operation secondary drilling, forms stable duct；
(4) liquid nitrogen freezing stratum is persistently injected：The duct that secondary drilling is formed by the use of in step (three) is used as liquid nitrogen and ground
The space of layer heat exchange, reinserts in the borehole liquid nitrogen ascending pipe, injects liquid nitrogen, makes stratum cooling until freezing；
(5) complete to freeze：Frozen soil body scope, temperature, intensity are reached after design requirement, stop liquid nitrogen injection, extract liquid nitrogen
Ascending pipe, completes Freezing stratum as rapid.
Wherein, the rigid straight pipe of liquid nitrogen ascending pipe and rustless steel flexible hose are connected by screw thread or flange, and rustless steel is compiled
The flexible pipe other end is knitted by screwed connection liquid nitrogen storage (liquid nitrogen bottle or liquid nitrogen tank car).
Liquid nitrogen ascending pipe threshold value bottom hole 200-300mm in step (four), liquid nitrogen injection pressure 0.4-0.8Mpa, liquid nitrogen
Ensure drilling upper end liquid nitrogen not overflow in injection process, do not splash.
The method is adapted to the liquid nitrogen freezing construction vertical or diagonally downward that drills, and is not suitable for liquid vertically upward or obliquely
Nitrogen frozen construction.
Porous is carried out while when freezing, by liquid nitrogen allotter by liquid nitrogen storage and the flexible rustless steel of liquid nitrogen ascending pipe
Flexible hose is connected, and concrete steps are consistent with above-mentioned steps.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
Product is nitrogen after liquid nitrogen endothermic gasification, and gasification product has no adverse effects to stratum, environmentally safe, liquid nitrogen people
The coolant closed circulation system in Conventional cryogenic brine freezing is not necessarily formed during work Freezing stratum as rapid.Therefore, liquid nitrogen is made full use of
Low temperature, quick freezing property, force frozen ground, and for the dry operation of secondary drilling condition is provided, can be on ground after secondary drilling
Natural liquid nitrogen heat exchange space is formed in layer, liquid nitrogen is directly contacted with the soil body, be obtained in that higher heat exchange efficiency, improve and freeze
Knot speed.Traditional frigo processing, production, fixing link are reduced, material is saved, reduces cost improves construction speed.
Description of the drawings
Fig. 1 is the present invention without the artificial stratum freezing method steps flow chart schematic diagram of frigo liquid nitrogen；
Fig. 2 is the drilling construction schematic diagram of the present invention；
Fig. 3 is that schematic diagram is freezed in the drilling of the present invention；
Fig. 4 is the secondary drilling schematic diagram of the present invention；
Fig. 5 is the liquid nitrogen freezing schematic diagram of the present invention.
Wherein：1- drills；2- drilling rods；3- liquid nitrogen ascending pipes.
Specific embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention has that operation is more, workpiece is more, time-consuming for the method that existing liquid nitrogen freezer carries out Freezing stratum as rapid
Laborious the drawbacks of, there is provided one kind is without the artificial stratum freezing method of frigo liquid nitrogen.
As shown in figure 1, the method includes construction drill, i.e., once drill；Drilling and peripheral extent Freezing stratum as rapid；Secondary brill
Construct in hole；Persistently inject liquid nitrogen freezing stratum；The step such as complete to freeze.Specific implementation process is as follows：
Certain shield starting freezing consolidation engineering, takes the liquid nitrogen Freezing stratum as rapid method of surface vertical borehole.
(1) stratum is related to plain fill, silty clay, freeze design drilling depth 25m, bore diameter 89mm, using mud
Retaining wall bore mode, is once drilled, and forms the drilling in the range of the depth of freezing, carries out borehole cleaning process, it is ensured that foot of hole
Scum silica frost thickness is less than 300mm.As shown in Figure 2.
(2) drilling and peripheral extent Freezing stratum as rapid：Liquid nitrogen ascending pipe 3 is inserted in drilling 1, is noted by air relief valve control
Enter the supply pressure of liquid nitrogen and the air-liquid state of supply liquid nitrogen.Liquid nitrogen ascending pipe is made up of two parts, and front end is rigid straight pipe,
Length 25.5m, rear end is rustless steel flexible hose, and both are connected by flange, and the rustless steel flexible hose other end passes through liquid nitrogen
Allotter connect liquid nitrogen tank car, between connected with flange.Using the rig and supporting drilling rod 2 of construction drill, by liquid nitrogen ascending pipe 3
Rigid straight pipe end insertion drilling 1 bottom.The depth of the insertion of liquid nitrogen ascending pipe 3 drilling 1 is measured by the length of drilling rod 2, control is firm
Property straight tube threshold value hole bottom distance be 300mm.Pressure is injected by the valve regulated liquid nitrogen adjusted on liquid nitrogen allotter, initially
During injection, low-pressure is taken to inject gaseous nitrogen, dredging pipeline and pre-cooling pipeline, pressure when drilling top there are continuous air bubbles to emerge
For control pressure, 15min is stably supplied.Injection pressure is incrementally increased to 0.4Mpa, liquid nitrogen is slowly injected into, and using rig by
Drilling rod 2 is carried in step, speed controlling is lifted in 0.2m/min, liquid nitrogen ascending pipe 3 is progressively extracted.Treat liquid nitrogen ascending pipe 3 apart from brill
During the 0.2m of hole top, reduce injection pressure, make injection liquid nitrogen switch to gaseous nitrogen.Using drilling rod 2 liquid nitrogen ascending pipe 3 is inserted again
After drilling 1, the injection process that is previously mentioned of repetition 5 times, drilling and the periphery 100mm scopes soil body are presented frozen state, and liquid nitrogen
The pore space that ascending pipe 3 is formed after extracting in former drilling 1 does not cave in.Stop liquid nitrogen injection, extract liquid nitrogen ascending pipe 3.Such as Fig. 3
It is shown.
(3) secondary drilling construction：Using the dry operation secondary drilling of auger, stable duct is formed.As shown in Figure 4.
(4) liquid nitrogen freezing stratum is persistently injected：By the use of the duct of secondary drilling formation as liquid nitrogen and stratum heat exchange
Space, reinserts in the borehole liquid nitrogen ascending pipe 3, progressively injects liquid nitrogen, and liquid nitrogen vaporizes heat absorption in hole, progressively by cold to
External diffusion, makes stratum cooling until freezing.Liquid nitrogen ascending pipe threshold value bottom hole 200mm.Liquid nitrogen injects pressure 0.4Mpa, drilling
Upper end liquid nitrogen not overflow, do not splash.
(5) complete to freeze：According to monitoring is freezed, frozen soil body scope, temperature, intensity are reached after design requirement, stop liquid nitrogen
Injection, extracts liquid nitrogen ascending pipe, completes Freezing stratum as rapid.As shown in Figure 5.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (4)
1. one kind is without the artificial stratum freezing method of frigo liquid nitrogen, it is characterised in that：Comprise the following steps that：
(1) construction drill, i.e., once drill：According to stratigraphic type and drilling depth, bore diameter, bore mode is selected, formed
Drilling in the range of the depth of freezing, and carry out borehole cleaning process, it is ensured that foot of hole scum silica frost thickness is less than 300mm；
(2) drilling and peripheral extent Freezing stratum as rapid：Liquid nitrogen ascending pipe is inserted in drilling, by air relief valve control injection liquid nitrogen
Supply pressure and supply liquid nitrogen air-liquid state, liquid nitrogen ascending pipe is made up of two parts, and front end is rigid straight pipe, and rear end is
Rustless steel flexible hose, using the rig and supporting drilling rod of construction drill, by the rigid straight pipe end insertion drilling of liquid nitrogen ascending pipe
Bottom；The depth of liquid nitrogen ascending pipe insertion drilling is measured by run of steel, controlling rigid straight pipe threshold value hole bottom distance is
300-500mm；Pressure is injected by the valve regulated liquid nitrogen adjusted on liquid nitrogen storage, when initially injecting, takes low-pressure to note
Enter gaseous nitrogen, dredging pipeline and pre-cooling pipeline, injection pressure there are continuous air bubbles to emerge to be defined by the top that drills；Incrementally increase injection
Pressure is slowly injected into liquid nitrogen to 0.4-0.6Mpa, and progressively above carries drilling rod using rig, lifts speed controlling in 0.2-
0.4m/min, liquid nitrogen ascending pipe is progressively extracted；When liquid nitrogen ascending pipe will extract drilling, reduce injection pressure, make injection
Liquid nitrogen switchs to gaseous nitrogen；Using drilling rod the insertion of liquid nitrogen ascending pipe is drilled again, the above-mentioned injection process of repetition, when drilling and periphery
100mm scope freezing soils, and when the pore space of formation does not cave in former drilling after liquid nitrogen ascending pipe is extracted, stop liquid nitrogen note
Enter, extract liquid nitrogen ascending pipe；
(3) secondary drilling construction：Muddy water and surrounding formations are into frozen state in drilling hole, using auger stem operation
Secondary drilling, forms stable duct；
(4) liquid nitrogen freezing stratum is persistently injected：The duct that secondary drilling is formed by the use of in step (three) is used as liquid nitrogen and stratum heat
The space of exchange, reinserts in the borehole liquid nitrogen ascending pipe, injects liquid nitrogen, makes stratum cooling until freezing；
(5) complete to freeze：Frozen soil body scope, temperature, intensity are reached after design requirement, stop liquid nitrogen injection, extract liquid nitrogen injection
Pipe, completes Freezing stratum as rapid.
2. according to claim 1 without the artificial stratum freezing method of frigo liquid nitrogen, it is characterised in that：The liquid nitrogen injection
The rigid straight pipe and rustless steel flexible hose of pipe is connected by screw thread or flange, and the rustless steel flexible hose other end is connected by screw thread
Connect liquid nitrogen storage.
3. according to claim 1 without the artificial stratum freezing method of frigo liquid nitrogen, it is characterised in that：The step (four)
Middle liquid nitrogen ascending pipe threshold value bottom hole 200-300mm, liquid nitrogen injection pressure 0.4-0.8Mpa ensures to bore in liquid nitrogen injection process
The liquid nitrogen not overflow of hole upper end, do not splash.
4. according to claim 1 without the artificial stratum freezing method of frigo liquid nitrogen, it is characterised in that：The method is adapted to bore
Hole liquid nitrogen freezing construction vertically or diagonally downward.
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| CN201611205956.0A CN106592573B (en) | 2016-12-23 | 2016-12-23 | A kind of artificial stratum freezing method of no frigo liquid nitrogen |
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| CN201611205956.0A CN106592573B (en) | 2016-12-23 | 2016-12-23 | A kind of artificial stratum freezing method of no frigo liquid nitrogen |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108179740A (en) * | 2017-12-29 | 2018-06-19 | 湖北工业大学 | A kind of construction method across solution cavity bored concrete pile |
| CN109339075A (en) * | 2018-11-16 | 2019-02-15 | 中国地质科学院探矿工艺研究所 | Landslide emergency control technology management method |
| CN110094207A (en) * | 2019-05-23 | 2019-08-06 | 王海霖 | A kind of artificial stratum freezing system and method for low temperature nitrogen circularly cooling |
| CN110939453A (en) * | 2019-12-20 | 2020-03-31 | 中铁隧道局集团有限公司 | Cutter real-time monitoring system and normal-pressure cutter changing method |
| CN111472685A (en) * | 2020-04-16 | 2020-07-31 | 四川省科建煤炭产业技术研究院有限公司 | Intermittent dynamic condensation deep hole drilling method |
| CN114718047A (en) * | 2022-05-19 | 2022-07-08 | 南京林业大学 | Utilize on-spot carbonization processing system of dry ice reinforcement foundation soil |
| CN114718039A (en) * | 2022-04-12 | 2022-07-08 | 宋恩泽 | Drilling and liquid nitrogen freezing integrated dam reinforcing device and reinforcing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0771183A (en) * | 1993-09-03 | 1995-03-14 | Minami Kogyo:Kk | Frozen construction method |
| CN102720506A (en) * | 2012-05-31 | 2012-10-10 | 中铁隧道股份有限公司 | Method for replacing tail brush in shield tunnel through liquid nitrogen freezing |
| CN102912788A (en) * | 2012-11-15 | 2013-02-06 | 陈绍文 | Method for constructing emergency passages rapidly on soft soil foundations |
| CN104762955A (en) * | 2015-03-24 | 2015-07-08 | 河南理工大学 | Manually excavated pedestal pile construction method based on freezing process |
| WO2016098367A1 (en) * | 2014-12-19 | 2016-06-23 | ケミカルグラウト株式会社 | Ground freezing construction method and ground freezing system |
-
2016
- 2016-12-23 CN CN201611205956.0A patent/CN106592573B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0771183A (en) * | 1993-09-03 | 1995-03-14 | Minami Kogyo:Kk | Frozen construction method |
| CN102720506A (en) * | 2012-05-31 | 2012-10-10 | 中铁隧道股份有限公司 | Method for replacing tail brush in shield tunnel through liquid nitrogen freezing |
| CN102912788A (en) * | 2012-11-15 | 2013-02-06 | 陈绍文 | Method for constructing emergency passages rapidly on soft soil foundations |
| WO2016098367A1 (en) * | 2014-12-19 | 2016-06-23 | ケミカルグラウト株式会社 | Ground freezing construction method and ground freezing system |
| CN104762955A (en) * | 2015-03-24 | 2015-07-08 | 河南理工大学 | Manually excavated pedestal pile construction method based on freezing process |
Non-Patent Citations (2)
| Title |
|---|
| 《北京工业大学学报》 * |
| 《建井技术》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108179740A (en) * | 2017-12-29 | 2018-06-19 | 湖北工业大学 | A kind of construction method across solution cavity bored concrete pile |
| CN109339075A (en) * | 2018-11-16 | 2019-02-15 | 中国地质科学院探矿工艺研究所 | Landslide emergency control technology management method |
| CN109339075B (en) * | 2018-11-16 | 2021-06-11 | 中国地质科学院探矿工艺研究所 | Landslide emergency control technology management method |
| CN110094207A (en) * | 2019-05-23 | 2019-08-06 | 王海霖 | A kind of artificial stratum freezing system and method for low temperature nitrogen circularly cooling |
| CN110094207B (en) * | 2019-05-23 | 2020-07-17 | 王海霖 | Artificial stratum freezing system and method for low-temperature nitrogen circulating refrigeration |
| CN110939453B (en) * | 2019-12-20 | 2021-01-29 | 中铁隧道局集团有限公司 | Cutter real-time monitoring system and normal-pressure cutter changing method |
| CN110939453A (en) * | 2019-12-20 | 2020-03-31 | 中铁隧道局集团有限公司 | Cutter real-time monitoring system and normal-pressure cutter changing method |
| CN111472685A (en) * | 2020-04-16 | 2020-07-31 | 四川省科建煤炭产业技术研究院有限公司 | Intermittent dynamic condensation deep hole drilling method |
| CN111472685B (en) * | 2020-04-16 | 2021-10-01 | 四川省科建煤炭产业技术研究院有限公司 | Intermittent dynamic condensation deep hole drilling method |
| CN114718039A (en) * | 2022-04-12 | 2022-07-08 | 宋恩泽 | Drilling and liquid nitrogen freezing integrated dam reinforcing device and reinforcing method |
| CN114718039B (en) * | 2022-04-12 | 2023-09-26 | 宋恩泽 | Drilling and liquid nitrogen freezing integrated dam reinforcement device and reinforcement method |
| CN114718047A (en) * | 2022-05-19 | 2022-07-08 | 南京林业大学 | Utilize on-spot carbonization processing system of dry ice reinforcement foundation soil |
| CN114718047B (en) * | 2022-05-19 | 2023-03-31 | 南京林业大学 | Utilize on-spot carbonization processing system of dry ice reinforcement foundation soil |
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