CN110067562A - The refrigerant system design method and detail design device of constructing tunnel - Google Patents
The refrigerant system design method and detail design device of constructing tunnel Download PDFInfo
- Publication number
- CN110067562A CN110067562A CN201910284641.7A CN201910284641A CN110067562A CN 110067562 A CN110067562 A CN 110067562A CN 201910284641 A CN201910284641 A CN 201910284641A CN 110067562 A CN110067562 A CN 110067562A
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- Prior art keywords
- freezing
- design
- hole
- numerical value
- chilling requirement
- Prior art date
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Links
- 238000013461 design Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000003507 refrigerant Substances 0.000 title claims abstract description 15
- 238000007710 freezing Methods 0.000 claims abstract description 151
- 230000008014 freezing Effects 0.000 claims abstract description 151
- 239000002689 soil Substances 0.000 claims description 14
- 239000012267 brine Substances 0.000 claims description 13
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 13
- 238000011161 development Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000498 cooling water Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 6
- 235000015110 jellies Nutrition 0.000 claims description 3
- 239000008274 jelly Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 16
- 238000007596 consolidation process Methods 0.000 abstract description 12
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of refrigerant system design method of constructing tunnel and detail design devices, comprising: obtains the geological information in tunnel, and determines the freezing parameters of service channel and pump house；Obtain parameter value corresponding with the freezing parameters；The chilling requirement numerical value of exploitation Freezing Station based on the parameter；The equipment of Freezing Station is chosen according to the chilling requirement numerical value and calculates engineering power load.Design method and detail design device of the invention, design procedure is simple and easy, is capable of forming effective consolidation by freezing layer, ensure that the construction safety of service channel.
Description
Technical field
The invention belongs to Tunnel Design technical fields, and in particular to a kind of refrigerant system design method of constructing tunnel and
A kind of refrigeration system detail design device of constructing tunnel.
Background technique
Safety and maintenance channel of the service channel as two subway tunnels in connection left and right, are the important attached of subway line
One of engineering generallys use freezing consolidation soil layer before Freezing Method for Cross-passage Construction, to guarantee that tunnel is not in Freezing Method for Cross-passage Construction
Sedimentation occurs and collapses, if can be carried out effective consolidation by freezing, be the critical issue for guaranteeing Freezing Method for Cross-passage Construction safety, therefore
It needs to be designed the refrigeration system for carrying out consolidation by freezing.
Summary of the invention
The present invention provide a kind of constructing tunnel refrigerant system design method and detail design device, design procedure it is simply easy
Row, is capable of forming effective consolidation by freezing layer, ensure that the construction safety of service channel.
The refrigerant system design method of constructing tunnel provided by the invention, comprising: obtain the geological information in tunnel, and determine
The freezing parameters of service channel and pump house；Obtain parameter value corresponding with the freezing parameters；Value meter based on the parameter
Calculate the chilling requirement numerical value of Freezing Station；The equipment of Freezing Station is chosen according to the chilling requirement numerical value and calculates engineering power load.
Preferably, the geological information includes stratum geological information and hydrogeological information, and the freezing parameters include: to set
Between meter brine temp, freezing hole single hole flow, freezing hole allow deflection distance, the control of access sites freezing hole pore-forming maximum allowable
Away from, frozen soil development speed, freezing curtain hand over circle the time, reach the design thickness time.
Preferably, the parameter value corresponding with freezing parameters, comprising: the design brine temp be -29 DEG C, it is described
Freezing hole single hole flow is greater than 5m3/ h, the freezing hole allow deflection distance be less than 150mm, the access sites freezing hole at
Pitch of holes is less than that 900mm, the frozen soil development speed are 22mm/d, to hand over the circle time be 20 days to the freezing curtain, described is reached
The design thickness time is 40 days.
It is preferably based on the parameter value and calculates the chilling requirement numerical value of Freezing Station, including be calculated using the following equation:
Q=1.2 π d.HK, wherein
Q- freezing hole chilling requirement numerical value；
H- freezes total length (containing cold comb length)；
D- freezes pipe diameter；
K- freezing pipe coefficient of heat transfer, 250Kcal/h ㎡.
Preferably, which is characterized in that the equipment that Freezing Station is chosen according to the chilling requirement numerical value, comprising: choose refrigerator
Room Screw chiller；Choose freezing system ancillary equipment.
Preferably, the freezing system ancillary equipment includes: salt water circulating pump, cooling water circulating pump and connecting tube.
On the other hand, the present invention also provides a kind of detail design device of the frost wall in tunnel, the detail design dresses
Setting includes: processor, is used for: obtaining the geological information in tunnel, and determines the freezing parameters of service channel and pump house；Acquisition and institute
State the corresponding parameter value of freezing parameters；The chilling requirement numerical value of exploitation Freezing Station based on the parameter；It is cold according to the need
Numerical quantity chooses the equipment of Freezing Station and calculates engineering power load.
Preferably, the geological information includes stratum geological information and hydrogeological information, and the freezing parameters include: to set
Between meter brine temp, freezing hole single hole flow, freezing hole allow deflection distance, the control of access sites freezing hole pore-forming maximum allowable
Away from, frozen soil development speed, freezing curtain hand over circle the time, reach the design thickness time.
Preferably, the parameter value corresponding with freezing parameters, comprising: the design brine temp be -29 DEG C, it is described
Freezing hole single hole flow is greater than 5m3/ h, the freezing hole allow deflection distance be less than 150mm, the access sites freezing hole at
Pitch of holes is less than that 900mm, the frozen soil development speed are 22mm/d, to hand over the circle time be 20 days to the freezing curtain, described is reached
The design thickness time is 40 days.
It is preferably based on the parameter value and calculates the chilling requirement numerical value of Freezing Station, including be calculated using the following equation:
Q=1.2 π d.HK, wherein
Q- freezing hole chilling requirement numerical value；
H- freezes total length (containing cold comb length)；
D- freezes pipe diameter；
K- freezing pipe coefficient of heat transfer, 250Kcal/h ㎡.
Preferably, which is characterized in that the equipment that Freezing Station is chosen according to the chilling requirement numerical value, comprising: choose refrigerator
Room Screw chiller；Choose freezing system ancillary equipment.
Preferably, the freezing system ancillary equipment includes: salt water circulating pump, cooling water circulating pump and connecting tube.
The refrigerant system design method and detail design device of constructing tunnel provided by the invention, according to the tunnel of acquisition
Geological information determines the freezing parameters of service channel and pump house, to meet the requirement of Specific construction environment；Freeze to join based on described
The chilling requirement numerical value of number exploitation Freezing Station chooses the equipment of Freezing Station according to the chilling requirement numerical value and calculates engineering and uses
Electric load forms effective consolidation by freezing layer to meet construction requirement.Refrigerant system design method of the invention, design procedure letter
It is single easy, it is capable of forming effective consolidation by freezing layer, ensure that the construction safety of service channel.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the step flow chart of the refrigerant system design method of the constructing tunnel of embodiment according to the present invention.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
With reference to the accompanying drawing, technical solution in the embodiment of the present invention is described in detail.
In order to guarantee the safety of Freezing Method for Cross-passage Construction, freezing consolidation soil layer is generallyd use before Freezing Method for Cross-passage Construction,
To guarantee that sedimentation and collapsing do not occur for tunnel in Freezing Method for Cross-passage Construction, need to set the refrigeration system for carrying out consolidation by freezing
Meter, guarantee form effective consolidation by freezing layer, guarantee the construction safety of service channel.
As shown in Figure 1, the refrigerant system design method of constructing tunnel provided by the invention, comprising: obtain the geology in tunnel
Information, and determine the freezing parameters of service channel and pump house；Obtain parameter value corresponding with the freezing parameters；Based on described
The chilling requirement numerical value of parameter value calculating Freezing Station；The equipment of Freezing Station is chosen according to the chilling requirement numerical value and calculates engineering
Power load.
According to the technique and scheme of the present invention, the geological information in tunnel is obtained first, and determines the jelly of service channel and pump house
Junction parameter；Obtain parameter value corresponding with the freezing parameters.
A kind of embodiment according to the present invention, the geological information include stratum geological information and hydrogeological information,
The freezing parameters include: to design brine temp, freezing hole single hole flow, freezing hole deflection distance, access sites is allowed to freeze
Hole pore-forming controls maximum allowable spacing, frozen soil development speed, freezing curtain and hands over the circle time, reaches the design thickness time, according to tool
The stratum geological information and hydrogeological information of body select the freezing parameters, more meet the requirement of Specific construction environment.
A kind of embodiment according to the present invention, it is preferable that the parameter value corresponding with freezing parameters, comprising: institute
It states design brine temp and is greater than 5m for -29 DEG C, the freezing hole single hole flow3/ h, the freezing hole allow deflection distance to be less than
150mm, the access sites freezing hole are less than 900mm at pitch of holes, the frozen soil development speed is 22mm/d, described freezes curtain
It is 20 days that curtain, which hands over the circle time, described to reach the design thickness time be 40 days.The present invention reduces design by reasonable value and calculates
Range, reduce calculated load, improve computational efficiency.It is carried out also according to value of the practical operation situation to each freezing parameters
Adjustment, specifically, the design brine temp can be adjusted between -28 DEG C~-30 DEG C, and freezing hole single hole flow can
In 5~7m3It is adjusted in the range of/h, the freezing curtain hands over the circle time that can be controlled according to practical operation situation 20
It is~22 days, described to reach the design thickness time and be adjusted to actively to freeze 45 days etc. according to thermometric situation.
According to the technique and scheme of the present invention, the chilling requirement numerical value of exploitation Freezing Station based on the parameter.
A kind of embodiment according to the present invention, it is preferable that the chilling requirement number of exploitation Freezing Station based on the parameter
Value, including be calculated using the following equation: Q=1.2 π d.HK, wherein
Q- freezing hole chilling requirement numerical value；
H- freezes total length (containing cold comb length)；
D- freezes pipe diameter；
K- freezing pipe coefficient of heat transfer, 250Kcal/h ㎡.
According to the technique and scheme of the present invention, it chooses the equipment of Freezing Station according to the chilling requirement numerical value and calculates engineering and use
Electric load.
A kind of embodiment according to the present invention, it is preferable that according to the equipment that the chilling requirement numerical value chooses Freezing Station, packet
It includes: choosing refrigerator room Screw chiller；Choose freezing system ancillary equipment.
Specifically, according to calculated result, single service channel refrigerator room can select 170WDEDD type Screw chiller (mark
Condition refrigerating capacity is 11.7 × 104Kcal/h) 2, wherein 1 is stand-by equipment.
A kind of embodiment according to the present invention, it is preferable that the freezing system ancillary equipment include: salt water circulating pump,
Cooling water circulating pump and connecting tube.
Specifically, salt water circulating pump selects 2, ISW150-315 type, and separate unit flow is 200m3/ h, power of motor are
30kw, wherein 1 spare；
Cooling water circulation selects IRG125-125 type fresh water pump 2, flow 160m3/ h, power of motor 15kw, wherein
1 spare；
Cooling tower selects 2, SLB-80 type；Supplement fresh water amount is 15m3/h；
Freezing pipe selects 89 × 8mm of Φ, screwed connection；It freezes comb and selects 45 × 3mm of Φ；
Thermometer hole pipe shallow bore hole selects Φ 32mm × 3mm steel pipe；
Liquid supply pipe selects 48 × 3.5mm of Φ steel pipe, using welded connecting；
The steel pipe of salt water conduit tube sum aggregate liquid distribution pipe selection 159 × 5mm of Φ；
Cooling water pipe selects 127 × 4.5mm of Φ water supply steel pipe；
Refrigerator oil selects N46 refrigerator oil；
Refrigerant selects freon R-22, and refrigerant agent selects calcium chloride solution.
The use load superposition calculation of service channel and pump house engineering power load by each equipment, about 300kw/h.
On the other hand, the present invention also provides a kind of detail design device of the frost wall in tunnel, the detail design dresses
Setting includes: processor, is used for: obtaining the geological information in tunnel, and determines the freezing parameters of service channel and pump house；Acquisition and institute
State the corresponding parameter value of freezing parameters；The chilling requirement numerical value of exploitation Freezing Station based on the parameter；It is cold according to the need
Numerical quantity chooses the equipment of Freezing Station and calculates engineering power load.
Preferably, the geological information includes stratum geological information and hydrogeological information, and the freezing parameters include: to set
Between meter brine temp, freezing hole single hole flow, freezing hole allow deflection distance, the control of access sites freezing hole pore-forming maximum allowable
Away from, frozen soil development speed, freezing curtain hand over circle the time, reach the design thickness time.
Preferably, the parameter value corresponding with freezing parameters, comprising: the design brine temp be -29 DEG C, it is described
Freezing hole single hole flow is greater than 5m3/ h, the freezing hole allow deflection distance be less than 150mm, the access sites freezing hole at
Pitch of holes is less than that 900mm, the frozen soil development speed are 22mm/d, to hand over the circle time be 20 days to the freezing curtain, described is reached
The design thickness time is 40 days.
It is preferably based on the parameter value and calculates the chilling requirement numerical value of Freezing Station, including be calculated using the following equation:
Q=1.2 π d.HK, wherein
Q- freezing hole chilling requirement numerical value；
H- freezes total length (containing cold comb length)；
D- freezes pipe diameter；
K- freezing pipe coefficient of heat transfer, 250Kcal/h ㎡.
Preferably, which is characterized in that the equipment that Freezing Station is chosen according to the chilling requirement numerical value, comprising: choose refrigerator
Room Screw chiller；Choose freezing system ancillary equipment.
Preferably, the freezing system ancillary equipment includes: salt water circulating pump, cooling water circulating pump and connecting tube.
The refrigerant system design method and detail design device of constructing tunnel provided by the invention, according to the tunnel of acquisition
Geological information determines the freezing parameters of service channel and pump house, to meet the requirement of Specific construction environment；Freeze to join based on described
The chilling requirement numerical value of number exploitation Freezing Station chooses the equipment of Freezing Station according to the chilling requirement numerical value and calculates engineering and uses
Electric load forms effective consolidation by freezing layer to meet construction requirement.Refrigerant system design method and step of the invention is simply easy
Row, is capable of forming effective consolidation by freezing layer, ensure that the construction safety of service channel.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (12)
1. a kind of refrigerant system design method of constructing tunnel, which is characterized in that the design method includes:
The geological information in tunnel is obtained, and determines the freezing parameters of service channel and pump house；
Obtain parameter value corresponding with the freezing parameters；
The chilling requirement numerical value of exploitation Freezing Station based on the parameter；
The equipment of Freezing Station is chosen according to the chilling requirement numerical value and calculates engineering power load.
2. design method according to claim 1, which is characterized in that the geological information includes stratum geological information and water
Literary geological information, the freezing parameters include: design brine temp, freezing hole single hole flow, freezing hole permission deflection distance, lead to
When the maximum allowable spacing of road position freezing hole pore-forming control, frozen soil development speed, freezing curtain hand over the circle time, reach design thickness
Between.
3. design method according to claim 2, which is characterized in that the parameter value corresponding with freezing parameters, packet
It includes:
The design brine temp is -29 DEG C, the freezing hole single hole flow is greater than 5m3/ h, the freezing hole allow deflection distance
It is less than 900mm at pitch of holes less than 150mm, the access sites freezing hole, the frozen soil development speed is 22mm/d, the jelly
It is 20 days that knot curtain, which hands over the circle time, described to reach the design thickness time be 40 days.
4. design method according to claim 1, which is characterized in that the need of exploitation Freezing Station are cold based on the parameter
Numerical quantity, including be calculated using the following equation:
Q=1.2 π d.HK, wherein
Q- freezing hole chilling requirement numerical value；
H- freezes total length (containing cold comb length)；
D- freezes pipe diameter；
K- freezing pipe coefficient of heat transfer, 250Kcal/h ㎡.
5. design method described in any claim in -4 according to claim 1, which is characterized in that according to the chilling requirement number
The equipment that value chooses Freezing Station, comprising:
Choose refrigerator room Screw chiller；
Choose freezing system ancillary equipment.
6. design method according to claim 5, which is characterized in that the freezing system ancillary equipment includes: that salt water follows
Ring pump, cooling water circulating pump and connecting tube.
7. a kind of detail design device of the frost wall in tunnel, which is characterized in that the detail design device includes:
Processor is used for:
The geological information in tunnel is obtained, and determines the freezing parameters of service channel and pump house；
Obtain parameter value corresponding with the freezing parameters；
The chilling requirement numerical value of exploitation Freezing Station based on the parameter；
The equipment of Freezing Station is chosen according to the chilling requirement numerical value and calculates engineering power load.
8. detail design device according to claim 7, which is characterized in that the geological information includes stratum geological information
And hydrogeological information, the freezing parameters include: design brine temp, freezing hole single hole flow, freezing hole allow deflection away from
Maximum allowable spacing, frozen soil development speed, freezing curtain is controlled from, access sites freezing hole pore-forming to hand over the circle time, reach design
Thickness time.
9. detail design device according to claim 8, which is characterized in that the parameter corresponding with analysis parameter takes
Value, comprising:
The design brine temp is -29 DEG C, the freezing hole single hole flow is greater than 5m3/ h, the freezing hole allow deflection distance
It is less than 900mm at pitch of holes less than 150mm, the access sites freezing hole, the frozen soil development speed is 22mm/d, the jelly
It is 20 days that knot curtain, which hands over the circle time, described to reach the design thickness time be 40 days.
10. detail design device according to claim 7, which is characterized in that exploitation Freezing Station based on the parameter
Chilling requirement numerical value, including be calculated using the following equation:
Q=1.2 π d.HK, wherein
Q- freezing hole chilling requirement numerical value；
H- freezes total length (containing cold comb length)；
D- freezes pipe diameter；
K- freezing pipe coefficient of heat transfer, 250Kcal/h ㎡.
11. according to detail design device described in any claim in claim 7-10, which is characterized in that according to the need
The equipment of cooling capacity numerical value selection Freezing Station, comprising:
Choose refrigerator room Screw chiller；
Choose freezing system ancillary equipment.
12. detail design device according to claim 11, which is characterized in that the freezing system ancillary equipment includes:
Salt water circulating pump, cooling water circulating pump and connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910284641.7A CN110067562A (en) | 2019-04-10 | 2019-04-10 | The refrigerant system design method and detail design device of constructing tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910284641.7A CN110067562A (en) | 2019-04-10 | 2019-04-10 | The refrigerant system design method and detail design device of constructing tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110067562A true CN110067562A (en) | 2019-07-30 |
Family
ID=67367361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910284641.7A Pending CN110067562A (en) | 2019-04-10 | 2019-04-10 | The refrigerant system design method and detail design device of constructing tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593918A (en) * | 2019-10-15 | 2019-12-20 | 中铁十二局集团有限公司 | Freezing method based tunnel connection channel pump house construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3299643A (en) * | 1963-04-05 | 1967-01-24 | Mauclet Maurice | Sinking of shafts and galleries in sand and water-bearing ground |
| CN1614152A (en) * | 2004-10-14 | 2005-05-11 | 上海隧道工程股份有限公司 | Constructing method for in tunnel weak soil layer by freezing method horizontally |
| CN104790961A (en) * | 2015-04-27 | 2015-07-22 | 海南大学 | Vertical cup type freezing reinforcement structure and method at shield tunnel end |
| CN109209396A (en) * | 2018-11-16 | 2019-01-15 | 海南大学 | A kind of shield tunnel end joint reinforcement structure and construction method |
-
2019
- 2019-04-10 CN CN201910284641.7A patent/CN110067562A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3299643A (en) * | 1963-04-05 | 1967-01-24 | Mauclet Maurice | Sinking of shafts and galleries in sand and water-bearing ground |
| CN1614152A (en) * | 2004-10-14 | 2005-05-11 | 上海隧道工程股份有限公司 | Constructing method for in tunnel weak soil layer by freezing method horizontally |
| CN104790961A (en) * | 2015-04-27 | 2015-07-22 | 海南大学 | Vertical cup type freezing reinforcement structure and method at shield tunnel end |
| CN109209396A (en) * | 2018-11-16 | 2019-01-15 | 海南大学 | A kind of shield tunnel end joint reinforcement structure and construction method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593918A (en) * | 2019-10-15 | 2019-12-20 | 中铁十二局集团有限公司 | Freezing method based tunnel connection channel pump house construction method |
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Application publication date: 20190730 |
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