CN205975648U - Freezing pipe curtain steel pipe - Google Patents
Freezing pipe curtain steel pipe Download PDFInfo
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- CN205975648U CN205975648U CN201620004379.8U CN201620004379U CN205975648U CN 205975648 U CN205975648 U CN 205975648U CN 201620004379 U CN201620004379 U CN 201620004379U CN 205975648 U CN205975648 U CN 205975648U
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- pipe
- freezing
- steel pipe
- curtain
- curtain steel
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a freezing pipe curtain steel pipe, including the pipe -roof steel pipe, be provided with a plurality of roots freezing pipe parallel with the pipe -roof steel pipe in the pipe -roof steel pipe, it has the filler to be full of in the space between pipe -roof steel pipe inner wall and the freezing pipe outer wall. When freezing pipe quantity in the pipe -roof steel pipe was the even number, per two freezing pipe were a set of, and are outside through the two piece freezing pipe tip UNICOMs of U type pipe with each group in pipe -roof steel pipe one end. When freezing pipe quantity in the pipe -roof steel pipe was the odd number, it can independent endless feed pipe all to put into in each freezing pipe. The utility model discloses make up pipe -roof steel pipe and freezing pipe, frozen soil wall between pipe -roof steel pipe and pipe -roof (wherein freezing pipe actively freeze institute forms) makes up the atress system of strutting jointly of the big rigidity of formation together, but the loss of effective control groundwater to the interval of pipe -roof steel pipe be can increase, thereby pipe -roof steel pipe quantity, construction and operation safety are reduced.
Description
Technical field
The utility model is related to a kind of brick or concrete duct, especially a kind of freezing pipe curtain steel pipe.
Background technology
With the acceleration of Urbanization Process In China, build Large Underground Structure under downtown roads or important building more next
More.For shallow embedding big cross section, short-range city tunnel, uneconomical using shield construction, using cut and cover method to city
City's productive life interference is larger.When geological conditions is poor, buried depth is shallower, Sensitive Buildings are arranged at top, if adopting shallow embedding
Shallow mining method, surface subsidence is difficult to control to, once construction accident, will result in significant social influence.Therefore, how to look for
The construction method wearing Sensitive Buildings under a kind of shallow large-section underground structure being suitable for saturation rich water soft soil layer is very heavy
Will.
Pipe-roof method is exactly to head into steel pipe first with pipe-jacking technology in the underground structure surrounding planned to build, using lock between steel pipe
Mouth etc. carries out sealing, forms the watertightness underground space, then under the protection of big rigidity pipe curtain, surrounds the scope soil body to pipe curtain and enters
Row excavates and pours a kind of method of agent structure.Because pipe curtain forms big rigidity temporary support structures, it is possible to reduce during excavation
The earth's surface deformation causing, it is to avoid produce impact to surrounding building, for shallow embedding big cross section weak soil, building be intensive, environment is protected
Protect the engineering having high demands, there is unrivaled advantage.
Pipe-roof method has the characteristics that：
1st, soft soil layer big cross section pipe-roof method builds underground structure is usually to enter in the case of not having condition to take cut and cover method
Row；
2nd, usual pipe-roof method build underground structure earthing ratio is shallower, needs to pass through sensitive pipeline, road and structures, over the ground
The requirement of table deformation is higher；
3rd, it is applied to vcehicular tunnel, cross dimensions is than larger operating mode more；
4th, pipe-roof method can select different concrete engineering methods according to different stratum, surrounding enviroment and cross dimensions, that is, manage
Curtain method can derive many different pipe-roofing method；
5th, pipe curtain construction should adopt push bench process, because the earth's surface that push bench process can meet minimum deforms, higher attitude
Control accuracy.
The pipe-roofing method scope of application is wider, and from the point of view of the case history that abroad oneself has, pipe-roofing method is applied to backfill, sand
The various stratum such as soil, clay, rock stratum, has broad application prospects.
In recent years, domestic more and more to pipe-roof method application, have also been made some improvement, occur in that " new pipe-roofing method " (New
Tubular Roof Method, abbreviation NTR engineering method), also have person skilled to be called " method built in advance by pipe curtain ".It is main
Technology path is:Or drawn cluster large diameter steel pipe pushing tow to stratum using more traditional pipe-jacking technology or shield technique
In, in large diameter steel pipe, body is constructed, and joins together into the underground structure outline of design anticipation, then in the guarantor of shaped structure
Shield is lower to excavate inside configuration stratum, and internal structure of constructing.
Because large diameter steel pipe defines big rigidity temporary support structures, it is possible to reduce the earth's surface deformation causing during excavation,
Avoid producing impact to surrounding building, for shallow embedding big cross section weak soil, building is intensive, environmental protection requirement is high engineering,
There is unrivaled advantage.
Pipe-roofing method, based on single tube jacking, relies on fore shaft to be connected to form pipe row in steel pipe side between each single tube, and
Fore shaft space injection water-stop is to reach sealing requirement.After the completion of pipe row's jacking, form pipe curtain, then the soil body in pipe curtain is regarded
Soil property situation decides whether to carry out consolidation process；Subsequently internally support while excavating, until pipe curtain section excavates insertion, then
Pour internal structure.Pipe curtain can be various shapes, including semi-circular, round, door type, hollow etc..Pipe curtain is by rigid
Steel pipe forms interim soil-baffling structure, with reduce during excavation to the disturbance of the neighbouring soil body and correspondingly reduction surrounding soil deformation,
Reach and do not affect land operations during excavation and maintain the purpose of top buildings or structures and pipeline normal usage function.
However, when pipe curtain steel pipe is not linear but it may be difficult to ensure that the sealing between two push pipes latches into during shaped form
Work(connects, and then is difficult to ensure that the water sealing effect of pipe curtain.Meanwhile, for ensureing the water sealing effect of pipe curtain, between linear pipe curtain push pipe
Every close, so that pipe curtain push pipe increasing number, cause the waste of great manpower, material resources and financial resources.
Utility model content
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, providing a kind of freezing pipe curtain steel pipe, it was both
Can ensure that the water sealing effect of pipe curtain, the quantity of pipe curtain steel pipe can be reduced again, be particularly suitable for saturation rich water soft soil layer
Shallow large-section underground structure under wear Sensitive Buildings construction when supporting construction in.
For achieving the above object, the utility model adopts following technical proposals：
A kind of freezing pipe curtain steel pipe, including pipe curtain steel pipe, is provided with some and is put down with pipe curtain steel pipe in described pipe curtain steel pipe
The freezing pipe of row, described pipe curtain steel pipe inner wall and freeze between pipe outer wall space in be filled with filler.
When the freezing pipe quantity in pipe curtain steel pipe is even number, every two freezing pipes are one group, outside pipe curtain steel pipe one end
Portion freezes tube end UNICOM by U-tube by two of each group.Low temperature refrigerant medium flows into from wherein freezing pipe, through U
Type freezing pipe flows into second freezing pipe, then through second freezing pipe effuser curtain steel pipe, such circulation first makes in pipe curtain steel pipe
Filler form Frozen Soil Cylinder, As time goes on make the soil body outside pipe curtain steel pipe form Frozen Soil Cylinder again.
When the freezing pipe quantity in pipe curtain steel pipe is odd number, all puts in each freezing pipe and be capable of independent loops
Feed pipe.Low temperature refrigerant medium forms circulation by feed pipe in single freezing pipe, is now no longer provided with U-shaped freezing pipe, often
Root freezing pipe is all an independent circulating unit.
Described filler is concrete, soil cement, clay, sand or water.
Described pipe curtain diameter of steel tube is 0.8m-2m.
Described freezing pipe material is seamless low carbon steel pipe, PVC, PPR, ABS or PE plastic tube；When using liquid nitrogen freezing,
Using described plastic tube.
The described tube section that freezes is circular, I-shaped, X-shaped, T-shaped or Y shape.
The beneficial effects of the utility model are：
Pipe curtain steel pipe and freezing pipe are combined by the utility model, and the Frozen Soil Cylinder of pipe curtain steel pipe and pipe interlude is (wherein
Freezing pipe actively freezes to be formed) together combination form the common supporting stress system of big rigidity, can effective control underground water
Running off, and the spacing of pipe curtain steel pipe can be increased, thus reducing pipe curtain steel pipe quantity, constructing and operation security, be particularly suitable for using
In supporting construction when wearing Sensitive Buildings construction under the shallow large-section underground structure of saturation rich water soft soil layer.
Brief description
Fig. 1 is embodiment 1 front view；
Fig. 2 is embodiment 1 rearview；
Fig. 3 is embodiment 1 side view；
Fig. 4 is embodiment 2 front view；
Fig. 5 is embodiment 2 side view；
Fig. 6 is the support construction process chart with freezing pipe curtain steel pipe；
Fig. 7 is pipe curtain steel pipe jacking construction process figure；
Fig. 8 is freezing engineering construction process figure；
Wherein, 1. freezing pipe, 2. filler, 3. pipe curtain steel pipe, 4.U type pipe, 5. feed pipe.
Specific embodiment
With reference to the accompanying drawings and examples the utility model is further illustrated.
Embodiment 1：
As shown in Figure 1-Figure 3, freezing pipe curtain steel pipe, including the pipe curtain steel pipe 3 of a diameter of 0.8m-2m, described pipe curtain steel pipe 3
In be provided with some freezing pipes 1 parallel with pipe curtain steel pipe 3, described pipe curtain steel pipe inner wall and freeze the space between pipe outer wall
In be filled with filler 2.Filler 2 is concrete, soil cement, clay, sand or water.
When freezing pipe 1 quantity in pipe curtain steel pipe 3 is even number, every two freezing pipes 1 are one group, in pipe curtain steel pipe 3 one
End outside by U-tube 4 by each group of two freezing pipes 1 end UNICOM.Low temperature refrigerant medium flows from wherein freezing pipe 1
Enter, flow into second freezing pipe 1 through U-tube 4, then through second freezing pipe 1 effuser curtain steel pipe 3, such circulation first makes pipe curtain
Filler 2 in steel pipe 3 forms Frozen Soil Cylinder, As time goes on makes the soil body outside pipe curtain steel pipe 3 form Frozen Soil Cylinder again.
Freezing pipe 1 material is seamless low carbon steel pipe, PVC, PPR, ABS or PE plastic tube；When using liquid nitrogen freezing, adopt
Plastic tube.Freezing pipe 1 section is circular, I-shaped, X-shaped, T-shaped or Y shape.
Embodiment 2：
As shown in Figure 4, Figure 5, freezing pipe curtain steel pipe, including the pipe curtain steel pipe 3 of a diameter of 0.8m-2m, described pipe curtain steel pipe 3
In be provided with some freezing pipes 1 parallel with pipe curtain steel pipe 3, described pipe curtain steel pipe inner wall and freeze the space between pipe outer wall
In be filled with filler 2.Filler 2 is concrete, soil cement, clay, sand or water.
When freezing pipe 1 quantity in pipe curtain steel pipe 3 is odd number, all puts in each freezing pipe 1 and can independently follow
The feed pipe 5 of ring.Low temperature refrigerant medium forms circulation by feed pipe in single freezing pipe 1, is now no longer provided with U-tube 4,
Every freezing pipe 1 is all an independent circulating unit.
Freezing pipe 1 material is seamless low carbon steel pipe, PVC, PPR, ABS or PE plastic tube；When using liquid nitrogen freezing, adopt
Plastic tube.Freezing pipe 1 section is circular, I-shaped, X-shaped, T-shaped or Y shape.
The construction technology of above-mentioned two embodiment is as shown in Figure 6.
The construction procedure forming supporting construction build underground structure with freezing pipe curtain steel pipe is as follows：
1st, upper pipe working well and received well are constructed；
2nd, steel pipe jacking, jacking order is symmetrically to be carried out from lower to upper on the basis of the axis of cross section；
Note：Steel pipe laying method has：Fixed (leading) to Drilling Method, horizontal spiral drilling method, ram pipe construction method, push bench process, micro-
Type push bench process/micro-tunneling construction method, the most frequently used and it is recommended that push bench process.
3rd, in pipe curtain steel pipe 3, freezing pipe 1 is constructed, depending on the number of freezing pipe 1 is by designing.
4th, (filler 2 can be coagulation to inject filler 2 in the space between pipe curtain steel pipe 3 and wherein freezing pipe 1
Soil, soil cement, clay, sand are it might even be possible to be water).
5th, actively freeze to form Frozen Soil Cylinder.
6th, excavate in the supporting construction that freezing pipe curtain steel pipe is formed, support in excavation.
7th, construct internal structure paragraph by paragraph, ultimately form complete underground structure.
First, pipe curtain steel pipe pipe-jacking project arrangement and method for construction, technological process
(1) pipe curtain steel pipe situation
Pipe curtain steel pipe 3 diameter generally can take 0.8m-2m it is also possible to select bigger diameter according to concrete engineering situation.
(2) soil stabilization
First design requirement can be pressed to the soil body at hole before pipe curtain steel pipe push pipe jacking to reinforce, soil stabilization can be in active well
Carry out during construction.
(3) through walls appear
First slice off pre-buried steel box outside plate before appearing, and water-stopping steel boxing is connected to the outside of pre-buried steel box, then will
Watertight rubber circle is arranged on sealing steel loop.When preparing to appear, side block soil steel plate in steel box is sliced off, the reserved in the hole of cleaning
Immediately tool heads are advanced embedded hole after debris, shorten the dead time, make watertight rubber circle hug tool heads shell and play sealing
Effect.
To prevent tool heads from dropping when push pipe is through walls, at the initial stage through walls, less because burying, the deadweight of tool heads is only by two
Point supports, and is wherein guide rail, on the other hand bury the shallower soil body.Therefore, when tool heads are through walls, one on the one hand be carried
Initial angle (about 5 ') upwards, another aspect wall pipe bottom will have rest, and strengthens pipeline section and tool pipe, pipeline section and pipeline section
Between connection.Additionally, the propulsion of tool pipe must be rapid, do not make the soil body open-assembly time in wall pipe oversize.
(4) normal jacking
Pipeline is appeared after success, starts normal jacking.While tube coupling advances, the push-bench semi shield oil cylinder cutting front soil body
Discharge.Successively pushed ahead by tube coupling one, push-bench constantly advances last arrival received well, forms whole section of passage.
(5) pipe curtain steel pipe landing edge
Joint passes through welding annular and vertical stiffener reinforcing pipes end, increases its rigidity, the annular strength reinforced at it
On plate, connecting bolt, carry out spacing and fixing in work progress.On socket, setting twice neoprene packing circle is prevented
Water.Joint will have the adaptability of certain corner.
(6) enter received well
After push-bench reaches soil stabilization scope before received well, move speed should be slowed down, so that push-bench is slowly cut
The soil body, forms a more complete sealing hole.Make the particular location of push-bench outlet by measurement, by received well tool heads position
The concrete guard wall put cuts.When push-bench enters received well side, fast jacking wanted by push-bench, until push-bench ejects completely
Received well.
(7) pipe curtain mud displacement
After pipe curtain jacking terminates, for prevent pipe curtain occur delayed sedimentation, by design requirement material by jack-in process
Thixotropic slurry displace.Carried out using the system of pressure injection thixotropic slurry and pipeline during displacement.Pressure injection order：From first segment Guan Yi
Secondary carry out backward.
(8) pipe curtain filling concrete and filling
After pipe curtain jacking finishes and then installs freezing pipe wherein, can be filled with using slightly expanded concrete, apply
Hammering and ultrasound examination concrete compaction rate and whether closely connected and steel pipe between is used after work is complete.
(9) pipe curtain lubrication drag reduction
Using in the annulus between bentonite thixotropic slurry flow in pipes and surrounding soil layer, realization reduces jacking pipeline
Frictional resistance and stratum between.Slip casting is three parts, and the slip casting at slurry and hole is mended in tail synchronous slip casting, pipeline along the line.Touch
The basis becoming mud is made up of bentonite and water, in addition, according to the different soil body mix the outer-penetrating agent of different polymer Lai
Adjust mud property to meet use requirement.
(10) pipe curtain steel pipe jacking construction flow process
Push pipe jacking construction flow process is as shown in Figure 7.
2nd, freezing engineering arrangement and method for construction, technological process
Freezing engineering construction process is as shown in Figure 8：
(1) freeze pipe construction
Freezing pipe is laid in pipe curtain steel pipe by design requirement, can arrange heating tube or pressure relief vent if necessary, to control
Frost heaving processed.
(2) freezing pipe leak test
Carry out leak test after Freezing Station installation on request and vacuumize it is ensured that installation quality meets design requirement.
(3) freezing system installation and debugging
1. press 1.5 times of coefficient of refrigerating performance and match refrigeration plant.Refrigeration plant prepares 2 sets, a set of production, a set of emergent.
2. pipeline is connected with flange, expansion joint to be arranged, valve and survey in saline line and cooling water circulation pipeline
The testing elements such as Wen Yi, pressure gauge, flowmeter.Saline line is after leak test, cleaning with polystyrene foam plastics insulation, insulation
The outside plastic sheeting of layer is wrapped up.Collection brine distributing ring and the connection high-pressure rubber pipe of freezing pipe, the import and export of every freezing pipe are each
One, valve of dress, to control flow.
3. the evaporimeter of freezing unit and cryogenic pipe cotton-wool insulation, brine tank and the salt water conduit tube thick polyphenyl of 50mm
Vinylic foam plate is incubated.
4. unit fills fluorine and refrigerator refuels and carries out according to the requirement of equipment operating manual.Carry out refrigeration system first
Leak detection and nitrogen rinse, and after guaranteeing system ne-leakage, then fill fluorine oiling.
5. debugged after equipment installs and test running.In test running, each shape such as pressure, temperature to be adjusted at any time
State parameter, makes unit run under the conditions of the technical parameter about technological procedure and equipment requirement.
(4) actively freeze the stage.During freezing test running, timing detection brine temp, brine flow and frozen soil curtain
Curtain spread scenarios, adjust freezing system operational factor if necessary.Freezing system enters after working well and actively freezes.Actively freeze
Knot, it is simply that making full use of whole abilities of equipment, accelerates frozen soil development as early as possible, in design time, brine temp is dropped to design
Temperature.
(5) safeguard according to observed temperature data, freezing the stage will judge whether Frozen Soil Cylinder is handed over circle and reached design thickness,
Thermometric judges that Frozen Soil Cylinder friendship carries out inspecting hole examination again and digs after enclosing and reaching design thickness, confirms soil layer no circulating water in Frozen Soil Cylinder
(except saturation water) is formally excavated again afterwards.
(6), after the completion for the treatment of internal seal water structure, set brine heater in brine tank, hypothermic saline is heated, right
Frost wall carries out forced thaw, and using the mud sleeve grouting device previously reserved, is tracked formula thaw settlement grouting.Force solution
Freeze and be conducted batch-wise using subregion.
Although the above-mentioned accompanying drawing that combines is described to specific embodiment of the present utility model, not new to this practicality
The restriction of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel do not need to pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (5)
1. a kind of freezing pipe curtain steel pipe, is characterized in that, including pipe curtain steel pipe, is provided with some and pipe curtain in described pipe curtain steel pipe
The parallel freezing pipe of steel pipe, described pipe curtain steel pipe inner wall and freeze between pipe outer wall space in be filled with filler；
When the freezing pipe quantity in pipe curtain steel pipe is even number, every two freezing pipes are one group, logical outside pipe curtain steel pipe one end
Cross U-tube and freeze tube end UNICOM by two of each group；
When the freezing pipe quantity in pipe curtain steel pipe is odd number, each freezing pipe is all put into the feed flow being capable of independent loops
Pipe.
2. freezing pipe curtain steel pipe as claimed in claim 1, is characterized in that, described filler be concrete, soil cement, clay,
Sand or water.
3. freezing pipe curtain steel pipe as claimed in claim 1, is characterized in that, described pipe curtain diameter of steel tube is 0.8m-2m.
4. freezing pipe curtain steel pipe as claimed in claim 1, is characterized in that, described freezing pipe material be seamless low carbon steel pipe,
PVC, PPR, ABS or PE plastic tube；When using liquid nitrogen freezing, using described plastic tube.
5. freezing pipe curtain steel pipe as claimed in claim 1, is characterized in that, described freeze tube section be circular, I-shaped, X-shaped,
T-shaped or Y shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620004379.8U CN205975648U (en) | 2016-01-05 | 2016-01-05 | Freezing pipe curtain steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620004379.8U CN205975648U (en) | 2016-01-05 | 2016-01-05 | Freezing pipe curtain steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205975648U true CN205975648U (en) | 2017-02-22 |
Family
ID=58018455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620004379.8U Expired - Fee Related CN205975648U (en) | 2016-01-05 | 2016-01-05 | Freezing pipe curtain steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205975648U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108589706A (en) * | 2018-05-11 | 2018-09-28 | 佳琳 | A kind of compound frozen soil steel pipe pile construction method |
| CN111472367A (en) * | 2020-03-19 | 2020-07-31 | 中国矿业大学 | Freezing anchoring combined freezing cold plate and method |
-
2016
- 2016-01-05 CN CN201620004379.8U patent/CN205975648U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108589706A (en) * | 2018-05-11 | 2018-09-28 | 佳琳 | A kind of compound frozen soil steel pipe pile construction method |
| CN111472367A (en) * | 2020-03-19 | 2020-07-31 | 中国矿业大学 | Freezing anchoring combined freezing cold plate and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20190105 |