CN209654039U - Forced thaw device for subway frozen construction - Google Patents
Forced thaw device for subway frozen construction Download PDFInfo
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- CN209654039U CN209654039U CN201920205978.XU CN201920205978U CN209654039U CN 209654039 U CN209654039 U CN 209654039U CN 201920205978 U CN201920205978 U CN 201920205978U CN 209654039 U CN209654039 U CN 209654039U
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- heating tube
- subway
- freezing pipe
- construction
- pipe
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Abstract
The utility model embodiment is related to subway work technical field, provides a kind of forced thaw device for subway frozen construction, 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, 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 utility model embodiment is related to subway work technical field more particularly to a kind of for the strong of subway frozen construction
Thawing apparatus processed.
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.
Utility model content
The utility model embodiment provides the forced thaw device for being used for subway frozen construction, to solve at present using certainly
The problem that the method so thawed causes thawing rate slow, solves in conventional construction method that thaw collapse amount is big, and the thaw collapse period is long to be lacked
It falls into.
The utility model embodiment provides a kind of forced thaw device for subway frozen construction, comprising: freezing pipe adds
Heat 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~
2500m。
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.
Forced thaw device provided by the embodiment of the utility model for subway frozen construction adds using built in freezing pipe
Heat pipe 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 process
Middle generation Sand risk, stratum are adaptable；It can be by cable by the heating tube in all freezing pipes in course of defrosting
Parallel connection is thawed simultaneously, accelerates defrosting progress, without hot salt brine circulation, is not take up space in tunnel, can be same with other constructions
Shi Jinhang saves construction space and time.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural representation that the utility model is applied to steel pipe sheet for the forced thaw device of subway frozen construction
Figure；
Fig. 2 is that the structure that the utility model is applied to concrete pipe sheet for the forced thaw device of subway frozen construction is shown
It is intended to；
Fig. 3 is flow chart of the utility model 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
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
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 by the embodiment of the utility model for subway frozen construction,
It include: 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 the utility model embodiment, hot salt brine is replaced using freezing pipe heating pipe built-in, it is complete before frozen soil body thaws
It is cut off at orifice tube and sealed piece sealing of hole is used to construct, prevent that Sand risk, stratum adaptability occurs during sealing of hole
By force；Can be in parallel by the heating tube in all freezing pipes by cable in course of defrosting, it thaws simultaneously, accelerates defrosting progress, be not necessarily to
It is recycled using hot salt brine, is not take up space in tunnel, can carried out simultaneously with other constructions, save 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 the utility model embodiment, when the length of freezing pipe 1 is too long, the length of heating tube 2 also can be with freezing pipe 1
Length be adapted, by setting positioning wing the position of heating tube 2 is positioned so that the heat transfer of heating tube 2 is more equal
It is even, improve the efficiency of 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 the utility model embodiment, when the length of freezing pipe 1 is too long, the length of heating tube 2 also can be with freezing pipe 1
Length be adapted, by be arranged lantern ring can prevent the deformation as caused by its gravity factor of heating tube 2, to influence its production
The effect of heat amount.
In a specific embodiment, lantern ring with heating tube 2 mechanically or chemical mode connects.
It in the utility model embodiment, can be bonded by encapsulating between lantern ring and heating tube 2, the two can be kept
Between connective stability, it is also ensured that will not influence heating tube 2 generate heat effect.
In a specific embodiment, the center line of the center line and freezing pipe 1 of heating tube 2 is overlapped.
In the utility model embodiment, the center line of heating tube 2 and the center line of freezing pipe 1 are overlapped, and can to add
The heat transfer of heat pipe 2 is more uniform, prevents 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 the utility model embodiment, the length of heating tube 2 is chosen according to the length of freezing pipe 1, adds by
The length of heat pipe 2 is 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, can
The utmostly big thawing degree improved to the frozen soil around freezing pipe 1.
In a specific embodiment, sealed piece 4 is prepared using steel plate.
In the utility model embodiment, the size of steel plate used by sealed piece 4 is according to actual needs and freezing pipe
Diameter selected, 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 by the embodiment of the utility model 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 the utility model embodiment, hot salt brine is replaced using freezing pipe heating pipe built-in, it is complete before frozen soil body thaws
It is cut off at orifice tube and sealed piece sealing of hole is used to construct, prevent that Sand risk, stratum adaptability occurs during sealing of hole
By force；Can be in parallel by the heating tube in all freezing pipes by cable in course of defrosting, it thaws simultaneously, accelerates defrosting progress, be not necessarily to
It is recycled using hot salt brine, is not take up space in tunnel, can carried out simultaneously with other constructions, save the construction time.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (8)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920205978.XU CN209654039U (en) | 2019-02-18 | 2019-02-18 | Forced thaw device for subway frozen construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920205978.XU CN209654039U (en) | 2019-02-18 | 2019-02-18 | Forced thaw device for subway frozen construction |
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| Publication Number | Publication Date |
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| CN209654039U true CN209654039U (en) | 2019-11-19 |
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ID=68524379
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838238A (en) * | 2019-02-18 | 2019-06-04 | 中铁第四勘察设计院集团有限公司 | Forced thaw device and method for subway frozen construction |
-
2019
- 2019-02-18 CN CN201920205978.XU patent/CN209654039U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838238A (en) * | 2019-02-18 | 2019-06-04 | 中铁第四勘察设计院集团有限公司 | Forced thaw device and method for subway frozen construction |
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