CN109838238A - Forced thaw device and method for subway frozen construction - Google Patents
Forced thaw device and method for subway frozen construction Download PDFInfo
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- CN109838238A CN109838238A CN201910122941.5A CN201910122941A CN109838238A CN 109838238 A CN109838238 A CN 109838238A CN 201910122941 A CN201910122941 A CN 201910122941A CN 109838238 A CN109838238 A CN 109838238A
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- heating tube
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- 238000010276 construction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 92
- 230000008014 freezing Effects 0.000 claims abstract description 84
- 238000007710 freezing Methods 0.000 claims abstract description 84
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000000945 filler Substances 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010257 thawing Methods 0.000 description 17
- 239000002689 soil Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000012267 brine Substances 0.000 description 9
- 239000004576 sand Substances 0.000 description 9
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 238000005485 electric heating Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000007569 slipcasting Methods 0.000 description 4
- 238000007605 air drying Methods 0.000 description 3
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 3
- 235000011128 aluminium sulphate Nutrition 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000011405 expansive cement Substances 0.000 description 2
- 235000015110 jellies Nutrition 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004884 grey matter Anatomy 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- CCEKAJIANROZEO-UHFFFAOYSA-N sulfluramid Chemical group CCNS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CCEKAJIANROZEO-UHFFFAOYSA-N 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present embodiments relate to subway work technical fields, provide a kind of forced thaw device and method for subway frozen construction, which includes: freezing pipe, heating tube, filler material and sealed piece；The heating tube is sleeved in the freezing pipe along the length direction of the freezing pipe, gap between the freezing pipe and the heating tube is filled with the filler material, the sealed piece is mounted on one end of the freezing pipe, and the sealed piece is equipped with the through-hole passed through for the conducting wire of heating tube power supply.It is big that the forced thaw device for being used for subway frozen construction solves thaw collapse amount in traditional construction freezing method, the defect of thaw collapse period length, high construction efficiency is convenient, ground adaptability is strong, and forced thaw construction is not take up space in tunnel, it can be carried out simultaneously with other constructions, shorten the subway work period, especially there are certain economic results in society to Subway Tunnel construction.
Description
Technical field
The present embodiments relate to subway work technical field more particularly to a kind of pressure solutions for subway frozen construction
Freeze device and method.
Background technique
Subway Tunnel service channel is at present frequently with construction freezing method, due to the phase transformation of water and water in the soil body in work progress
Migrating for dividing causes the soil body that certain frost heaving amount occurs.After the completion of Freezing Method for Cross-passage Construction, need to thaw to frozen soil body, mesh
Preceding Normal practice is natural thaw.
Since the subway duration is more nervous, after the completion of Freezing Method for Cross-passage Construction, enters lay a railway track the stage quickly.And use nature
The method thawing rate of defrosting is slow, and not in time, effect is difficult to ensure tracking grouting, so as to cause the generation of two siding track of service channel
Biggish thaw collapse amount, influences rail smooth degree, is unfavorable for the operation of later period subway.
Summary of the invention
The embodiment of the present invention provides the forced thaw device and method for being used for subway frozen construction, uses at present to solve
The problem that the method for natural thaw causes thawing rate slow, solves in conventional construction method that thaw collapse amount is big, and the thaw collapse period is long
Defect.
The embodiment of the present invention provides a kind of forced thaw device for subway frozen construction, comprising: freezing pipe, heating
Pipe, filler material and sealed piece；
The heating tube is sleeved in the freezing pipe along the length direction of the freezing pipe, the freezing pipe and described
Gap between heating tube is filled with the filler material, and the sealed piece is mounted on one end of the freezing pipe, the sealed piece
It is equipped with the through-hole passed through for the conducting wire of heating tube power supply.
Wherein, the filler material includes pea gravel concreten and grouting material；
Hole of bowing in the gap is filled using the pea gravel concreten, uphole and the gap in the gap
In lateral aperture filled using the grouting material.
Wherein, the length direction along the heating tube is provided with multiple positioning wings, and the spacing of the adjacent positioning wing is
1500~2500mm.
Wherein, multiple lantern rings are equipped with along the length direction of the heating tube, the spacing of the adjacent lantern ring is 1500~
2500mm。
Wherein, the lantern ring with the heating tube mechanically or chemical mode connects.
Wherein, the center line of the center line of the heating tube and the freezing pipe is overlapped.
Wherein, the length of the heating tube is less than the length of the freezing pipe.
Wherein, the sealed piece is prepared using steel plate.
The embodiment of the present invention provides a kind of forced thaw method for subway frozen construction, comprising: heating tube along
The length direction of freezing pipe is sleeved in the freezing pipe；
Gap between the freezing pipe and the heating tube fills filler material；
Sealed piece is mounted on one end of the freezing pipe, the conducting wire for heating tube power supply passes through on the sealed piece
Through-hole after be connected to power supply, by heat that the heating tube generates to complete forced thaw.
Wherein, the gap filling filler material between the freezing pipe and the heating tube includes:
Hole of bowing in the gap is filled using pea gravel concreten, in the uphole and the gap in the gap
Lateral aperture is filled using grouting material.
Forced thaw device and method provided in an embodiment of the present invention for subway frozen construction, using built in freezing pipe
Heating tube replaces hot salt brine, and orifice tube is completed before frozen soil body thaws and cuts off and sealed piece sealing of hole is used to construct, prevents sealing of hole mistake
Sand risk occurs in journey, stratum is adaptable；It can be by cable by the heating in all freezing pipes in course of defrosting
Pipe is in parallel, thaws simultaneously, accelerates defrosting progress, without hot salt brine circulation, is not take up space in tunnel, can be with other constructions
It carries out simultaneously, saves construction space and time.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram that the present invention is applied to steel pipe sheet for the forced thaw device of subway frozen construction；
Fig. 2 is the structural representation that the present invention is applied to concrete pipe sheet for the forced thaw device of subway frozen construction
Figure；
Fig. 3 is flow chart of the present invention for the forced thaw method of subway frozen construction.
Description of symbols:
1- freezing pipe；2- heating tube；3- conducting wire；4- sealed piece；5- steel pipe sheet；6- filler material；7- aluminium sulfate microdilatancy
Cement；8- concrete pipe sheet；9- orifice tube；10- expansion bolt；11- built-in slip casting pipe；12-C30 aluminium sulfate microdilatancy water
Mud.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The method of forced thaw is carried out frequently with the mode that hot salt brine recycles at present, inefficiency.In Metro Connection Passage
Frozen construction is frequently with horizontal frozen hole, using gap is easily seeped between orifice tube and freezing pipe after conventional method forced thaw
Leakage, sealing pores are more difficult, and water burst easily occurs in aquifer water-bearing stratum and gushes husky risk, forced thaw is caused to be difficult to promote.
As depicted in figs. 1 and 2, the forced thaw device provided in an embodiment of the present invention for subway frozen construction, comprising:
Freezing pipe 1, heating tube 2, filler material 6 and sealed piece 4；
Heating tube 2 is sleeved in freezing pipe 1 along the length direction of freezing pipe 1, the sky between freezing pipe 1 and heating tube 2
Gap is filled with filler material 6, and sealed piece 4 is mounted on one end of freezing pipe 1, and sealed piece 4 is equipped with the conducting wire powered for heating tube 2 and wears
The through-hole crossed.
After frozen construction, using residual brine in pressure-air drying freezing pipe, then places and add in freezing pipe 1
Heat pipe 2, heating tube 2 can use temperature control electric heating tube, which includes electric heating tube, and electric heating tube one end is peace
End is filled, the other end is fixing end, and installation end is equipped with installation nut and locking screw, plug is equipped in installation end, in fixing end
Equipped with temperature controller, heating pipe unit is equipped in electric heating tube, heating pipe unit one end is connected with plug, and the other end is equipped with wiring
Column, binding post are equipped with electric wire, and electric wire is connected with temperature controller, and the length of fixing end is 3-6cm, and the length of installation end is 5-8cm,
Installation nut is positive hexagonal structure, and the height R1 for installing nut is greater than the height R2 of locking screw.Temperature controller can be according to scene
It needs to be adjusted, generally no more than 80 DEG C, after temperature is more than this temperature, automatic temp limit, it is more than specified for avoiding temperature
Value plays the role of protection heating pipe unit, saves electric power, extend the service life of product.After the completion of heating tube 2 is placed, freeze
It ties the gap between pipe 1 and heating tube 2 and fills filler material 6, orifice tube 9 can be cut off after filling is closely knit, and using envelope
Mouth part 4 blocks one end of freezing pipe 1, and the other end of freezing pipe 1 is located at the inside of frozen soil.After all freezing pipes 1 are disposed
The conducting wire of heating tube can be drawn by the through-hole on sealed piece 4, and be connected to power supply system, carry out forced thaw.
Can be thawed by the temperature probe monitoring reserved in the thermometer hole that is arranged in frozen construction during forced thaw into
Degree, at the same by service channel built-in slip casting pipe 11 to surrounding formations carry out thaw collapse compensation and grouting, reach the short time defrosting
The purpose of Frozen Soil Cylinder.Reserved heating pipe fitting is cut off after the completion of thawing, and reinforcement is carried out to sealed piece 4, to guarantee to seal
The intensity of mouth part 4.
In embodiments of the present invention, hot salt brine is replaced using freezing pipe heating pipe built-in, completes hole before frozen soil body thaws
Mouth pipe cuts off and sealed piece sealing of hole is used to construct, and prevents that Sand risk occurs during sealing of hole, stratum is adaptable；Solution
Can be in parallel by the heating tube in all freezing pipes by cable during jelly, it thaws simultaneously, accelerates defrosting progress, without heat
Brine recycling is not take up space in tunnel, can carry out simultaneously with other constructions, saves the construction time.
In a specific embodiment, filler material 6 includes pea gravel concreten and grouting material；
Hole of bowing in gap is filled using pea gravel concreten, and the lateral aperture in uphole and gap in gap uses institute
Grouting material is stated to be filled.
Pea gravel concreten refers to that maximum size of coarse aggregate is not more than the concrete of 15mm.Pea gravel concreten must not use volcano
Grey matter cement；Sand uses the medium coarse sand of 0.3~0.5mm of partial size, and coarse aggregate clay content should not exceed 1%；Fine aggregate clay content is not
It should be greater than 2%；Water uses tap water or drinkable natural water；Concrete strength is not lower than C20, every cubic meter of concrete water
Mud dosage is no less than 330kg, and the ratio of mud should not exceed 0.55；Sand factor is preferably 35%~40%；Cement-sand ratio is preferably 1: 2~1:
2.5。
Grouting material be using high-strength material as aggregate, using cement as bonding agent, be aided with upper flow regime, microdilatancy, prevent from
The substances such as analysis are formulated.A certain amount of water is added in it at the construction field (site), can be used after mixing evenly.Grouting material has gravity flow
Property good, fast hard, early strong, high-strength, ungauged regions, microdilatancy；It is nontoxic, harmless, not aging, pollution-free to water quality and ambient enviroment, from
The features such as close property is good, antirust.There is reliable in quality in construction party face, the advantages that reducing cost, shorten the construction period and is easy to use.
In a specific embodiment, the length direction along heating tube 2 is provided with multiple positioning wings, between adjacent positioned wing
Away from for 1500~2500mm.
In embodiments of the present invention, when the length of freezing pipe 1 is too long, the length of heating tube 2 also can be with the length of freezing pipe 1
Degree is adapted, and is positioned by setting positioning wing to the position of heating tube 2, so that the heat transfer of heating tube 2 is more uniform, is mentioned
The efficiency of high defrosting frozen soil.
In a specific embodiment, multiple lantern rings are equipped with along the length direction of heating tube 1, the spacing of adjacent lantern ring is
1500~2500mm.
In embodiments of the present invention, when the length of freezing pipe 1 is too long, the length of heating tube 2 also can be with the length of freezing pipe 1
Degree is adapted, and can prevent the deformation as caused by its gravity factor of heating tube 2 by the way that lantern ring is arranged, so that influencing it generates heat
The effect of amount.
In a specific embodiment, lantern ring with heating tube 2 mechanically or chemical mode connects.
In embodiments of the present invention, it can be bonded, can be kept between the two by encapsulating between lantern ring and heating tube 2
Connective stability, it is also ensured that will not influence the effect that heating tube 2 generates heat.
In a specific embodiment, the center line of the center line and freezing pipe 1 of heating tube 2 is overlapped.
In embodiments of the present invention, the center line of the center line and freezing pipe 1 of heating tube 2 is overlapped, and can make heating tube 2
Heat transfer it is more uniform, prevent the thawing degree of the frozen soil around freezing pipe 1 inconsistent.
In a specific embodiment, the length of heating tube 2 is less than the length of freezing pipe 1.
In embodiments of the present invention, the length of heating tube 2 is chosen according to the length of freezing pipe 1, by heating tube 2
Length be set as the similar length with freezing pipe 1, i.e. the length of heating tube 2 is slightly less than the length of freezing pipe 1, being capable of maximum journey
The big thawing degree improved to the frozen soil around freezing pipe 1 of degree.
In a specific embodiment, sealed piece 4 is prepared using steel plate.
In embodiments of the present invention, the size of steel plate used by sealed piece 4 according to actual needs and freezing pipe it is straight
Diameter is selected, and carrying out sealing of hole using steel plate can prevent that Sand risk occurs during sealing of hole.
As shown in figure 3, the forced thaw method provided in an embodiment of the present invention for subway frozen construction, comprising:
S1 is sleeved on heating tube in the freezing pipe along the length direction of freezing pipe；
When the length of freezing pipe 1 is too long, the length of heating tube 2 can be also adapted with the length of freezing pipe 1, pass through setting
Positioning wing positions the position of heating tube 2, so that heating tube 2 is located at the center of freezing pipe, makes the heat transfer of heating tube 2 more
Add uniformly, improves the efficiency of defrosting frozen soil；When the length of freezing pipe 1 is too long, the length of heating tube 2 also can be with freezing pipe 1
Length is adapted, and the deformation as caused by its gravity factor of heating tube 2 can be prevented by the way that lantern ring is arranged, to influence its generation
The effect of heat；It is bonded between lantern ring and heating tube 2 by encapsulating, connective stability between the two can be kept, it can also be with
Guarantee to will not influence the effect that heating tube 2 generates heat.
S2, the gap between the freezing pipe and the heating tube fill filler material；
Hole of bowing in gap is filled using pea gravel concreten, and the lateral aperture in uphole and the gap in gap is adopted
It is filled with grouting material.
S3 is mounted on sealed piece one end of the freezing pipe, and the conducting wire for heating tube power supply passes through the sealing
It is connected to power supply after through-hole on part, by heat that the heating tube generates to complete forced thaw.
Sealed piece 4 is prepared using steel plate, and the size of steel plate used by sealed piece 4 is according to actual needs and freezing pipe
Diameter is selected, and carrying out sealing of hole using steel plate can prevent that Sand risk occurs during sealing of hole.
As shown in Figure 1, being located at using pressure-air drying residual in the freezing pipe 1 inside steel pipe sheet 5 after frozen construction
Remaining salt water then places heating tube 2 in freezing pipe 1, and heating tube 2 can use temperature control electric heating tube, and heating tube 2, which is placed, to be completed
Afterwards, the gap between freezing pipe 1 and heating tube 2 fills filler material 6, can be cut off completely to orifice tube 9 after filling is closely knit,
And one end of freezing pipe 1 is blocked using sealed piece 4, sulphoaluminate micro-expansive cement 7 is filled in the compartment of steel pipe sheet 5, when all
Freezing pipe 1 can draw the conducting wire 3 of heating tube by the through-hole on sealed piece 4 after being disposed, and be connected to power supply system, into
Row forced thaw.It can be thawed by the temperature probe monitoring reserved in the thermometer hole that is arranged in frozen construction during forced thaw
Progress, at the same by service channel built-in slip casting pipe 11 to surrounding formations carry out thaw collapse compensation and grouting, reach the short time solution
Freeze the purpose of Frozen Soil Cylinder.Reserved heating pipe fitting is cut off after the completion of thawing, and reinforcement is carried out to sealed piece 4, to guarantee
The intensity of sealed piece 4.
Aluminium sulfate expanding cement is mainly used for the concreter for pouring component node and shrinking applied to impervious and compensation
Cheng Zhong, expanding cement refer to the cement that volume expansion is generated in aquation and hardening process, and general portland cement is in air
When hardening, volume can be shunk.Contraction can make water mudrock structure generate microcrack, reduce the density of water mudrock structure, shadow
Ring the impervious, freeze proof, anticorrosive etc. of structure.Expanding cement volume in hardening process will not be shunk, and also slightly be expanded, can
To solve due to shrinking bring negative consequence.
As shown in Fig. 2, after frozen construction, using freezing pipe 1 of the pressure-air drying inside concrete pipe sheet 8
Interior residual brine then places heating tube 2 in freezing pipe 1, and heating tube 2 can use temperature control electric heating tube, and heating tube 2 is placed
After the completion, the gap between freezing pipe 1 and heating tube 2 fills filler material 6, can cut off to orifice tube 9 after filling is closely knit,
And one end of freezing pipe 1 is blocked using sealed piece 4, the both ends of sealed piece 4 pass through an expansion bolt 10 respectively and are fixed on aperture
Guan Shang can be drawn the conducting wire 3 of heating tube by the through-hole on sealed piece 4 after all freezing pipes 1 are disposed, and is connected to
Power supply system carries out forced thaw.It can be by the thermometric reserved in the thermometer hole that is arranged in frozen construction during forced thaw
Probe monitors defrosting progress, at the same by service channel built-in slip casting pipe 11 to surrounding formations carry out thaw collapse compensation injection
C30 sulphoaluminate micro-expansive cement 12 achievees the purpose that short time defrosting Frozen Soil Cylinder.Reserved heating is cut off after the completion of thawing
Pipe fitting, and reinforcement is carried out to sealed piece 4, to guarantee the intensity of sealed piece 4.
In embodiments of the present invention, hot salt brine is replaced using freezing pipe heating pipe built-in, completes hole before frozen soil body thaws
Mouth pipe cuts off and sealed piece sealing of hole is used to construct, and prevents that Sand risk occurs during sealing of hole, stratum is adaptable；Solution
Can be in parallel by the heating tube in all freezing pipes by cable during jelly, it thaws simultaneously, accelerates defrosting progress, without heat
Brine recycling is not take up space in tunnel, can carry out simultaneously with other constructions, saves the construction time.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of forced thaw device for subway frozen construction characterized by comprising freezing pipe, heating tube, filler material
And sealed piece；
The heating tube is sleeved in the freezing pipe along the length direction of the freezing pipe, the freezing pipe and the heating
Gap between pipe is filled with the filler material, and the sealed piece is mounted on one end of the freezing pipe, sets on the sealed piece
The through-hole that the conducting wire of the promising heating tube power supply passes through.
2. the forced thaw device according to claim 1 for subway frozen construction, which is characterized in that the filler material
Including pea gravel concreten and grouting material；
Hole of bowing in the gap is filled using the pea gravel concreten, in the uphole and the gap in the gap
Lateral aperture is filled using the grouting material.
3. the forced thaw device according to claim 1 for subway frozen construction, which is characterized in that along the heating
The length direction of pipe is provided with multiple positioning wings, and the spacing of the adjacent positioning wing is 1500~2500mm.
4. the forced thaw device according to claim 1 for subway frozen construction, which is characterized in that along the heating
The length direction of pipe is equipped with multiple lantern rings, and the spacing of the adjacent lantern ring is 1500~2500mm.
5. the forced thaw device according to claim 4 for subway frozen construction, which is characterized in that the lantern ring and
The heating tube is mechanically or chemical mode connects.
6. the forced thaw device according to claim 1 for subway frozen construction, which is characterized in that the heating tube
Center line and the freezing pipe center line be overlapped.
7. the forced thaw device according to claim 1 for subway frozen construction, which is characterized in that the heating tube
Length be less than the freezing pipe length.
8. the forced thaw device according to claim 1 for subway frozen construction, which is characterized in that the sealed piece
It is prepared using steel plate.
9. a kind of forced thaw method for subway frozen construction characterized by comprising
Heating tube is sleeved in the freezing pipe along the length direction of freezing pipe；
Gap between the freezing pipe and the heating tube fills filler material；
Sealed piece is mounted on one end of the freezing pipe, passes through leading on the sealed piece for the conducting wire of heating tube power supply
Power supply is connected to behind hole, by heat that the heating tube generates to complete forced thaw.
10. the forced thaw method according to claim 9 for subway frozen construction, which is characterized in that described in institute
State between freezing pipe and the heating tube gap filling filler material include:
Hole of bowing in the gap is filled using pea gravel concreten, the level in uphole and the gap in the gap
Hole is filled using grouting material.
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| CN201910122941.5A CN109838238A (en) | 2019-02-18 | 2019-02-18 | Forced thaw device and method for subway frozen construction |
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| 上海市建设和交通委员会科学技术委员会: "复兴东路双层越江隧道工程", 31 August 2006, 上海科学技术出版社, pages: 203 - 205 * |
| 化工部设备设计技术中心站: "换热器设计", 30 April 1988, 上海科学技术出版社, pages: 192 - 193 * |
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