CN114165263B - Steel pipe ring piece for realizing stratum quick freezing and processing method thereof - Google Patents
Steel pipe ring piece for realizing stratum quick freezing and processing method thereof Download PDFInfo
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- CN114165263B CN114165263B CN202111307185.7A CN202111307185A CN114165263B CN 114165263 B CN114165263 B CN 114165263B CN 202111307185 A CN202111307185 A CN 202111307185A CN 114165263 B CN114165263 B CN 114165263B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 174
- 239000010959 steel Substances 0.000 title claims abstract description 174
- 238000007710 freezing Methods 0.000 title claims abstract description 75
- 230000008014 freezing Effects 0.000 title claims abstract description 75
- 238000003672 processing method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 19
- 238000007689 inspection Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000005536 corrosion prevention Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 10
- 238000011161 development Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 239000004519 grease Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/155—Laggings made of strips, slats, slabs or sheet piles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
- G01N33/204—Structure thereof, e.g. crystal structure
- G01N33/2045—Defects
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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- Structural Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Pathology (AREA)
- Mechanical Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a steel pipe ring piece for realizing stratum quick freezing and a processing method thereof, belonging to the technical field of tunnel construction. The steel pipe ring sheet comprises a plurality of arc steel pipe sheets which are sequentially connected to form the steel pipe ring sheet; the rib plates are fixedly connected to the inner surface of the arc-shaped steel pipe sheet in a mode of being perpendicular to the inner surface of the arc-shaped steel pipe sheet, the length direction of each rib plate is arranged along the width direction of the arc-shaped steel pipe sheet, a plurality of rib plates are arranged at intervals, and rib plate cavities are formed between adjacent rib plates; further comprises: the communication holes are penetrated and arranged on each rib plate, and adjacent rib plate cavities are communicated; a sealing plate for sealing each rib plate cavity; the water inlet port is communicated with the rib plate cavity and is used for injecting the refrigerating fluid into the rib plate cavity; and the water outlet port is communicated with the rib plate cavity and is used for leading out the refrigerating fluid in the rib plate cavity. The invention can greatly increase the contact area of the freezing liquid and the arc steel pipe sheet, has higher cold energy transmission efficiency, can realize the rapid development of the freezing wall and increases the development thickness of the freezing wall.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a steel pipe ring sheet for realizing stratum quick freezing and a processing method thereof.
Background
With the rapid development of urban rail transit and river-crossing tunnel engineering, the shield construction method is widely applied, and when a shield machine tunnels or passes through a sandy pebble stratum or turns with a small radius for a long distance, the shield tail steel wire brush can be greatly worn, the water-resisting property of the shield tail steel wire brush is affected, and the shield tail steel wire brush needs to be replaced in time at the moment so as to ensure the construction safety.
The conventional method for replacing the shield tail wire brush is a stratum reinforcing method, and a method for replacing the shield tail wire brush by a freezing method is developed by relevant units recently, but has obvious defects.
The stratum reinforcement effect is difficult to ensure, the stratum applicability is small, and effective reinforcement is difficult to perform on a water-rich sand layer; in the conventional freezing method, a freezing pipe is welded in a customized steel pipe sheet, and refrigerating fluid in the freezing pipe transfers cold to a stratum through the steel pipe sheet, so that the stratum is frozen.
At present, the freezing method has the advantages that the contact area of the freezing pipe and the steel pipe sheet is extremely small, the heat exchange efficiency is low, and the development of the freezing wall is greatly affected; on one hand, the development rate of the freezing wall is slow, and the construction period is delayed; on the other hand, the maximum thickness of the freezing wall is limited, and the safety is affected. Therefore, it is desirable to design a steel tube ring that allows for rapid development of the freeze wall, reduces energy loss, and increases the developed thickness of the freeze wall.
Through searching, chinese patent publication number: CN 213269887U; publication date: 2021, 5, 25; the utility model discloses a steel-pipe piece device for freezing shield constructs around machine tail soil body, include: a plurality of arc-shaped steel pipe sheets which are sequentially connected to form an annular steel pipe sheet; the inner surface of each arc-shaped steel pipe sheet is provided with a plurality of rows of freezing pipelines along an arc line, the same row of freezing pipelines on adjacent arc-shaped steel pipe sheets are connected through a first pipe to form a plurality of annular freezing pipelines, and the refrigerating medium in the annular freezing pipelines reduces the temperature of the annular steel pipe sheets so as to freeze soil around the annular freezing pipelines; the rib plate is arranged on the inner surface of the arc steel pipe sheet, a rib plate cavity is formed, grease with a low solidifying point is filled in the rib plate cavity, and an annular thin plate is arranged at the end head of the rib plate and used for blocking the rib plate cavity so as to prevent the grease from falling off. According to the application, grease is filled in the rib plate cavity so as to increase the contact area between the freezing pipe and the steel pipe sheet, and although the heat exchange efficiency can be improved, the rib plate cavity on the steel pipe sheet is more, the grease filling process is more complicated in the actual construction process, and the time consumption is more.
Disclosure of Invention
In order to solve at least one of the above technical problems, according to an aspect of the present invention, there is provided a steel pipe ring sheet for realizing rapid freezing of a stratum, including:
the arc steel pipe sheets are sequentially connected to form steel pipe ring sheets;
the rib plates are fixedly connected to the inner surface of the arc-shaped steel pipe sheet in a mode of being perpendicular to the inner surface of the arc-shaped steel pipe sheet, the length direction of each rib plate is arranged along the width direction of the arc-shaped steel pipe sheet, a plurality of rib plates are arranged at intervals, and rib plate cavities are formed between every two adjacent rib plates;
further comprises:
the communication holes are penetrated and arranged on each rib plate, and adjacent rib plate cavities are communicated;
the sealing plate is arranged on one side of the inner surface of the arc steel pipe sheet and is used for sealing each rib plate cavity;
the water inlet port is communicated with the rib plate cavity and is used for injecting the refrigerating fluid into the rib plate cavity;
and the water outlet port is communicated with the rib plate cavity and is used for leading out the refrigerating fluid in the rib plate cavity.
According to the embodiment of the invention, the steel pipe ring piece for realizing rapid freezing of the stratum, optionally, further comprises:
and the connecting channel is communicated with two rib plate cavities at the connected ends of two adjacent arc-shaped steel pipe sheets.
According to the steel pipe ring piece for realizing rapid freezing of stratum, optionally, the connecting channel is a U-shaped pipe.
According to the steel pipe ring piece for realizing rapid freezing of stratum, the water inlet interface and the water outlet interface are respectively communicated with two rib plate cavities at the connected ends of two adjacent arc steel pipe pieces.
According to the steel pipe ring piece for realizing rapid freezing of stratum, optionally, the connecting ends of two adjacent arc steel pipe pieces provided with the water inlet interface and the water outlet interface are not provided with communication pipelines.
According to the steel pipe ring piece for realizing rapid freezing of stratum, optionally, the water inlet interface and the water outlet interface are arranged at the joint ends of two adjacent arc steel pipe pieces with the lowest height positions in the steel pipe ring piece.
According to the steel pipe annular sheet for realizing rapid freezing of stratum, optionally, the arc steel pipe sheet comprises K blocks and adjacent blocks L 1 Adjacent block L 2 Standard block B 1 Standard block B 2 And standard block B 3 。
According to another aspect of the invention, a processing method of a steel pipe ring piece for realizing stratum quick freezing is provided, and the steel pipe ring piece for realizing stratum quick freezing based on the processing method comprises the following steps:
s1, manufacturing each arc steel pipe piece according to the size design;
s2, connecting holes are formed in each rib plate of each arc steel pipe sheet, and a water inlet interface or a water outlet interface or a connecting channel reserved interface is processed at the joint end of each arc steel pipe sheet;
s3, performing nondestructive inspection on welding seams on the inner sides of the arc-shaped steel pipe sheets, welding a sealing plate to seal rib plate cavities after the welding seams are qualified, and performing nondestructive inspection on exposed welding seams of the arc-shaped steel pipe sheets;
s4, assembling each arc steel pipe sheet in a test mode, performing a water leakage detection test, and removing the temporary connection structure among the arc steel pipe sheets after the test is qualified to finish manufacturing.
According to the processing method for the steel pipe ring piece for realizing rapid freezing of the stratum, optionally, in the step S3, after the nondestructive inspection of the weld joint on the inner side of each arc-shaped steel pipe piece is qualified, the inner side is subjected to corrosion prevention treatment, and then a sealing plate is welded.
According to the processing method of the steel pipe ring piece for realizing rapid freezing of the stratum, optionally, the step S4 specifically comprises the following steps:
s40, each arc steel pipe slice sequentially follows the standard block B 3 Standard block B 1 Standard block B 2 Adjacent block L 1 Adjacent block L 2 And K blockPerforming trial assembly, and temporarily fixing each arc steel pipe sheet by using a connecting bolt;
s41, connecting the joint end with the reserved interface of the connecting channel by adopting the connecting channel, and respectively installing a water inlet pipeline or a water outlet pipeline at the joint end with the water inlet interface or the water outlet interface;
s42, closing a water outlet port, connecting a pressure water pump at a water inlet pipeline, injecting water into the pipe under the pressure of 0.1MPa, observing each arc steel pipe piece, and indicating that the water leakage detection is qualified when no water leakage or wet stain occurs;
s43, dismantling the water inlet pipeline, the water outlet pipeline, the connecting channel and the connecting bolt to finish manufacturing.
Advantageous effects
Compared with the prior art, the invention has at least the following beneficial effects:
(1) According to the steel pipe ring piece for realizing rapid freezing of stratum, the structure is improved on the basis of the structure of the existing arc steel pipe piece, through arranging the communication holes on each rib plate and matching with the structural design of the sealing plates and the water inlet and outlet interfaces, the contact area of refrigerating fluid and the arc steel pipe piece is greatly increased, the higher cold energy transfer efficiency is realized, the rapid development of the freezing wall can be realized, the development thickness of the freezing wall is increased, the stress mode of the existing steel pipe piece is not changed by the structural improvement of the steel pipe ring piece, and the stress requirement in the shield construction process can be met after the arc steel pipe pieces are connected into a ring;
(2) The steel pipe ring piece for realizing rapid freezing of stratum is provided with the connecting channel, after all the arc steel pipe pieces are spliced into a ring, a refrigerating fluid loop is formed among all the arc steel pipe pieces, and the cooling effect of the whole steel pipe ring piece can be ensured everywhere;
(3) According to the steel pipe ring piece for realizing rapid freezing of stratum, the water inlet port and the water outlet port are arranged at the joint ends of two adjacent arc steel pipe pieces with the lowest height positions in the steel pipe ring piece, the freezing liquid injected from the water inlet port can fully fill the inner space of each rib plate cavity from bottom to top, and the freezing effect of each position of the steel pipe ring piece is ensured;
(4) The processing method for realizing the rapid freezing of the stratum is used for processing the common arc steel pipe sheet, has low processing cost and processing difficulty, can effectively reduce the corrosion of the freezing liquid to the steel pipe sheet structure by matching with nondestructive inspection and corrosion prevention treatment in the processing process, ensures the effective service life of the steel pipe sheet, and can ensure the use effect of the steel pipe sheet by matching with the water leakage detection operation after trial assembly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present invention and are not limiting of the present invention.
FIG. 1 shows a top view of the outer surface of a partially arcuate steel sheet of the present invention;
FIG. 2 shows a cross-sectional view in the A-A direction;
FIG. 3 shows an enlarged view at A in FIG. 2;
FIG. 4 shows a schematic view of a partially arcuate steel sheet structure
Reference numerals:
1. arc steel pipe pieces; 10. k blocks; 11. adjacent block L 1 The method comprises the steps of carrying out a first treatment on the surface of the 12. Adjacent block L 2 The method comprises the steps of carrying out a first treatment on the surface of the 13. Standard block B 1 The method comprises the steps of carrying out a first treatment on the surface of the 14. Standard block B 2 The method comprises the steps of carrying out a first treatment on the surface of the 15. Standard block B 3 ；
2. Rib plates; 20. rib plate cavity; 200. a subchamber;
3. a communication hole;
4. a sealing plate;
5. a water inlet port;
6. a water outlet interface;
7. a connection channel;
8. and a reinforcing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "a" and "an" and "the" and similar referents used in the specification and claims of the present application are not to be construed to cover any sequential, quantitative, or importance, but rather are to be construed to distinguish between various components.
Example 1
The steel pipe ring piece of realizing stratum quick freezing of this embodiment includes:
the arc steel pipe sheets 1 are sequentially connected to form steel pipe ring sheets;
the rib plates 2 are fixedly connected to the inner surface of the arc-shaped steel pipe sheet 1 in a manner of being perpendicular to the inner surface of the arc-shaped steel pipe sheet 1, the length direction of each rib plate 2 is arranged along the width direction of the arc-shaped steel pipe sheet 1, a plurality of rib plates 2 are arranged at intervals, and rib plate cavities 20 are formed between every two adjacent rib plates 2;
further comprises:
communication holes 3 penetrating through the rib plates 2 to communicate adjacent rib plate cavities 20;
a sealing plate 4 arranged on one side of the inner surface of the arc steel pipe sheet 1 and used for sealing each rib plate cavity 20;
a water inlet port 5 which is communicated with the rib plate cavity 20 and is used for injecting the refrigerating fluid into the rib plate cavity 20;
and the water outlet port 6 is communicated with the rib plate cavity 20 and is used for leading out the refrigerating fluid in the rib plate cavity 20.
The existing freezing method is characterized in that a freezing pipe is welded in a steel pipe sheet, refrigerating fluid in the freezing pipe transmits cold to a stratum through the steel pipe sheet, so that stratum freezing is realized, and because the contact area between the freezing pipe and the steel pipe sheet is extremely small, the heat exchange efficiency is low, and great influence is brought to the construction period and the safety, the design of the steel pipe sheet structure capable of effectively improving the heat exchange efficiency is a problem to be solved urgently, and meanwhile, the structural design of the steel pipe sheet needs to meet the stress condition in consideration of high requirements on stress in the shield construction process.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the steel pipe ring sheet for realizing rapid freezing of strata in this embodiment is based on the existing structure of the arc steel pipe sheet 1, the communication holes 3 are formed in each rib plate 2 of the arc steel pipe sheet 1, and each rib plate cavity 20 is closed by the sealing plate 4, therefore, after the freezing liquid is injected into each rib plate cavity 20 through the water inlet interface 5, each rib plate cavity 20 can be filled through the communication holes 3, and then the freezing liquid is led out through the water outlet interface 6, so as to form a freezing loop.
Example 2
The steel pipe annular sheet for realizing rapid freezing of stratum in the embodiment is further improved on the basis of the embodiment 1, and further comprises:
and a connecting channel 7 for connecting two rib cavities 20 at the connecting ends of two adjacent arc-shaped steel pipe sheets 1.
As shown in fig. 2, 3 and 4, the end plates of each arc steel pipe sheet 1 are not provided with communication holes, the end plates need to be fixedly connected with each other in the actual construction process, and through modes of connecting bolts or welding and the like, for the rib plate cavities 20 at the end parts of the arc steel pipe sheets 1, in order to ensure the fluidity of the internal freezing liquid and the heat exchange efficiency of the rib plate cavities, the connecting channels 7 are arranged, the rib plate cavities 20 at the end parts of one arc steel pipe sheet 1 are communicated with the rib plate cavities 20 at the end parts of the other arc steel pipe sheet 1 connected with the connecting channels, thus after the arc steel pipe sheets 1 are spliced into a ring, a freezing liquid loop is formed between the arc steel pipe sheets 1, and the cooling effect can be ensured at all positions of the whole steel pipe ring sheet.
Further, the connecting channel 7 is a U-shaped tube.
One end of the U-shaped pipe penetrates through the sealing plate 4 and is communicated with the rib plate cavity 20 at the end part of one arc-shaped steel pipe sheet 1, and the other end of the U-shaped pipe penetrates through the sealing plate 4 and is communicated with the rib plate cavity 20 at the end part of the other arc-shaped steel pipe sheet 1.
The U-shaped pipe structure can communicate the two rib plate cavities 20 which are in contact on the premise of not affecting the connection of the two arc-shaped steel pipe sheets 1.
Example 3
The steel pipe ring sheet for realizing rapid freezing of stratum in the embodiment is further improved on the basis of the embodiment 2, and the water inlet interface 5 and the water outlet interface 6 are respectively communicated with two rib plate cavities 20 at the connected ends of two adjacent arc steel pipe sheets 1;
the connecting ends of two adjacent arc steel pipe sheets 1 provided with a water inlet connector 5 and a water outlet connector 6 are not provided with a communication pipeline 7.
As shown in fig. 2 and fig. 4, the water inlet port 5 and the water outlet port 6 are respectively arranged at the end parts of two different adjacent arc-shaped steel pipe sheets 1, and the connecting channel 7 is not arranged at the joint part, so that the freezing liquid introduced from the water inlet port 5 can completely flow through the whole steel pipe ring sheet, and the fluidity of the freezing liquid at all parts of the steel pipe ring sheet is ensured.
Example 4
The steel pipe ring piece for realizing rapid freezing of stratum in the embodiment is further improved on the basis of the embodiment 3, and the water inlet interface 5 and the water outlet interface 6 are arranged at the joint ends of two adjacent arc steel pipe pieces 1 with the lowest height positions in the steel pipe ring piece.
Through the structure setting of this embodiment, the freezing liquid that from inlet port 5 injection can be from bottom to top, fully fills each floor cavity 20 inner space, ensures the freezing effect everywhere of steel pipe ring piece.
Example 5
The steel pipe ring sheet for realizing rapid stratum freezing of the embodiment is further improved on the basis of the embodiment 4, and the arc steel pipe sheet 1 comprises a K block 10 and an adjacent block L 1 11. Adjacent block L 2 12. Standard block B 1 13. Standard block B 2 14 and standard block B 3 15。
As shown in fig. 2, the present embodiment adopts the existing steel pipe ring structural design, and improves the structure based on the existing design shape, and has strong structural adaptability and low manufacturing cost.
Further, the arc steel pipe sheet 1 of this embodiment is formed with a reinforcing ring 8 on its inner surface along the circumferential direction, the reinforcing ring 8 has a plurality of, and the interval arrangement, from this, separates each rib plate chamber 20 into a plurality of subchambers 200, from this, the intercommunicating pore 3 has all been seted up to the rib plate 2 department of every subchamber 200, along steel pipe ring sheet circumference, each subchamber 200 constitutes the circulation path of multirow refrigerating fluid, the circulation path of every row all sets up a water inlet interface 5 and water outlet interface 6 respectively, as shown in fig. 4, multichannel refrigerating fluid return circuit coaction, further strengthens the freezing effect.
Example 6
The processing method for realizing rapid freezing of stratum of the steel pipe ring piece comprises the following steps:
s1, manufacturing each arc-shaped steel pipe sheet 1 according to the size design;
s2, connecting holes 3 are formed in each rib plate 2 of each arc steel pipe sheet 1, and a water inlet interface 5 or a water outlet interface 6 or a reserved interface of a connecting channel 7 is processed at the joint end of each arc steel pipe sheet 1;
s3, performing nondestructive inspection on welding seams on the inner sides of the arc-shaped steel pipe sheets 1, performing corrosion prevention treatment on the inner sides after the welding seams are qualified, then sealing rib plate cavities 20 by welding sealing plates 4, and performing nondestructive inspection on exposed welding seams of the arc-shaped steel pipe sheets 1;
s4, assembling each arc steel pipe piece 1 in a trial mode, performing a water leakage detection test, removing a temporary connection structure between each arc steel pipe piece 1 after the test is qualified, and finishing manufacturing, wherein the method specifically comprises the following steps of:
s40, each arc steel pipe sheet 1 sequentially follows the standard block B 3 15. Standard block B 1 13. Standard block B 2 14. Adjacent block L 1 11. Adjacent block L 2 12 and the K block 10 are connected in sequence, trial assembly is carried out, and the arc steel pipe sheets 1 are temporarily fixed by connecting bolts;
s41, connecting the connecting ends with reserved interfaces of the connecting channels 7 by adopting the connecting channels 7, and respectively installing a water inlet pipeline or a water outlet pipeline at the connecting ends with water inlet interfaces 5 or water outlet interfaces 6;
s42, closing the water outlet port 6, connecting a pressure water pump at the water inlet pipeline, injecting water into the pipe under the pressure of 0.1MPa, observing each arc-shaped steel pipe sheet 1, and indicating that the water leakage detection is qualified when no water leakage or wet stain occurs;
s43, dismantling the water inlet pipeline, the water outlet pipeline, the connecting channel 7 and the connecting bolts to finish manufacturing.
Taking a specific manufacturing process as an example, the embodiment manufactures a standard steel pipe ring sheet with the width of 1.5m, the inner diameter of 6m and the outer diameter of 6.7m, firstly, a K block 10 and an adjacent block L are manufactured according to the standard external dimension 1 11. Adjacent block L 2 12. Standard block B 1 13. Standard block B 2 14 and standard block B 3 15；
The center of the rib plate 2 of each arc steel pipe sheet 1 is provided with a communication hole 3, the bottom end of the communication hole 3 is 5cm away from the inner side surface of the arc steel pipe sheet 1, the aperture of the communication hole 3 is 5cm in the embodiment, in the actual manufacturing process, the aperture size of the communication hole 3 can be designed in a targeted manner according to different requirements of the flow and the flow rate of the refrigerating fluid in different construction environments so as to flexibly control the flow and the flow rate of the refrigerating fluid;
for standard block B 1 13 and adjacent block L 1 11 adjacent two rib plate cavities 20 are provided with holes on the sealing plates 4, and a reserved interface of the connecting channel 7 is welded; for adjacent blocks L 1 The sealing plates 4 of two adjacent rib plate cavities 20 of the 11 and the K blocks 10 are provided with holes, and the connecting channels 7 are welded to reserve interfaces; for K block 10 and adjacent block L 2 The sealing plates 4 of two adjacent rib plate cavities 20 are provided with holes, and a reserved interface of a connecting channel 7 is welded; for adjacent blocks L 2 12 and Standard Block B 2 The sealing plates 4 of two adjacent rib plate cavities 20 are provided with holes, and a reserved interface of the connecting channel 7 is welded; for standard block B 2 14 and standard block B 3 15 adjacent two rib plate cavities 20 are provided with holes on the sealing plates 4, and a reserved interface of the connecting channel 7 is welded;
in standard block B 1 13 near standard block B 3 15, a through hole is arranged on the sealing plate 4 at the end rib plate cavity 20 and a water inlet interface 5 is arranged; in standard block B 3 15 near standard block B 1 13, a through hole is arranged on the sealing plate 4 at the end rib plate cavity 20 and a water outlet port 6 is arranged;
then carrying out nondestructive inspection on the welding lines on the inner sides of the arc-shaped steel pipe sheets 1, spraying an anti-corrosion layer on the inner side walls of the rib plate cavities 20 after all the welding lines are qualified, carrying out anti-corrosion treatment, then carrying out welding of the sealing plates 4, and carrying out nondestructive inspection on the exposed welding lines after the welding of the sealing plates 4 is finished;
after the nondestructive inspection is qualified, six arc steel pipe sheets 1 are assembled in a trial mode, and the standard blocks B are sequentially adopted 3 15. Standard block B 1 13. Standard block B 2 14. Adjacent block L 1 11. Adjacent block L 2 12 and the K block 10 are spliced in the connecting sequence, and the connecting ends are temporarily fixed by adopting connecting bolts;
after fixing, a U-shaped pipe is connected to the reserved interface of each channel 7, and a water inlet pipeline and a water outlet pipeline are respectively connected with the water inlet interface 5 and the water outlet interface 6;
and (3) carrying out pressurized water injection for a plurality of times after connection, wherein no water leakage or wet stain appears in each pressurized water injection, which indicates that the water leakage detection is qualified, and dismantling the water inlet pipeline, the water outlet pipeline, the connecting channel 7 and the connecting bolts after the water leakage detection is qualified.
Example 7
In step S2, when the communicating hole 3 is opened to the rib plate 2, the aperture d of the communicating hole 3 is determined by the following calculation model:
wherein n is the number of openings in the longitudinal section of the steel tube ring, i.e. the number of subchambers 200 into which one rib chamber 20 is divided, taking the structure of fig. 4 as an example, n=5; v is the flow rate of the refrigerating fluid, and the effect of taking v=0.1m/s is optimal; Δt is the temperature difference (DEG C) of the refrigerating fluid of the water inlet interface 5 and the water outlet interface 6; gamma is the density of the refrigerating fluid (kg/m) 3 ) The method comprises the steps of carrying out a first treatment on the surface of the c is the specific heat of the refrigerating fluid (kJ/(kg. ℃); qz is the refrigeration capacity (kJ/h) required by the refrigeration station; w is the total flow (m) calculated by the refrigerating fluid circulation 3 /h)。
In the actual processing process, according to the requirement of the refrigerating station on the refrigerating capacity during the construction of the target tunnel, the aperture of the communication hole 3 is determined through the calculation model of the embodiment, so that the processed steel pipe ring piece can be ensured to effectively meet the cooling requirement during the actual use.
The examples of the present invention are merely for describing the preferred embodiments of the present invention, and are not intended to limit the spirit and scope of the present invention, and those skilled in the art should make various changes and modifications to the technical solution of the present invention without departing from the spirit of the present invention.
Claims (9)
1. A processing method of steel pipe ring pieces for realizing stratum quick freezing is characterized in that the processing method is based on the steel pipe ring pieces for realizing stratum quick freezing, and comprises the following steps of,
the arc steel pipe sheets are sequentially connected to form steel pipe ring sheets;
the rib plates are fixedly connected to the inner surface of the arc-shaped steel pipe sheet in a mode of being perpendicular to the inner surface of the arc-shaped steel pipe sheet, the length direction of each rib plate is arranged along the width direction of the arc-shaped steel pipe sheet, a plurality of rib plates are arranged at intervals, and rib plate cavities are formed between every two adjacent rib plates;
the communication holes are penetrated and arranged on each rib plate, and adjacent rib plate cavities are communicated;
the sealing plate is arranged on one side of the inner surface of the arc steel pipe sheet and is used for sealing each rib plate cavity;
the water inlet port is communicated with the rib plate cavity and is used for injecting the refrigerating fluid into the rib plate cavity;
the water outlet port is communicated with the rib plate cavity and is used for leading out the refrigerating fluid in the rib plate cavity;
the method comprises the following steps:
s1, manufacturing each arc steel pipe piece according to the size design;
s2, connecting holes are formed in each rib plate of each arc steel pipe sheet, and a water inlet interface or a water outlet interface or a connecting channel reserved interface is processed at the joint end of each arc steel pipe sheet;
s3, performing nondestructive inspection on welding seams on the inner sides of the arc-shaped steel pipe sheets, welding a sealing plate to seal rib plate cavities after the welding seams are qualified, and performing nondestructive inspection on exposed welding seams of the arc-shaped steel pipe sheets;
s4, assembling each arc steel pipe sheet in a test mode, performing a water leakage detection test, and removing the temporary connection structure among the arc steel pipe sheets after the test is qualified to finish manufacturing.
2. The processing method of the steel pipe ring piece for realizing stratum quick freezing according to claim 1, which is characterized by comprising the following steps: in the step S3, after the nondestructive inspection of welding seams on the inner sides of the arc-shaped steel pipe sheets is qualified, the inner sides are subjected to corrosion prevention treatment, and then the sealing plates are welded.
3. The method for processing the steel pipe ring piece for realizing stratum quick freezing according to claim 1, wherein the step S4 specifically comprises the following steps:
s40, each arc steel pipe slice sequentially follows the standard block B 3 Standard block B 1 Standard block B 2 Adjacent block L 1 Adjacent block L 2 The connection sequence of the K blocks is adopted to carry out trial assembly, and each arc steel pipe sheet is temporarily fixed by a connecting bolt;
s41, connecting the joint end with the reserved interface of the connecting channel by adopting the connecting channel, and respectively installing a water inlet pipeline or a water outlet pipeline at the joint end with the water inlet interface or the water outlet interface;
s42, closing a water outlet port, connecting a pressure water pump at a water inlet pipeline, injecting water into the pipe under the pressure of 0.1MPa, observing each arc steel pipe piece, and indicating that the water leakage detection is qualified when no water leakage or wet stain occurs;
s43, dismantling the water inlet pipeline, the water outlet pipeline, the connecting channel and the connecting bolt to finish manufacturing.
4. The method for processing the steel pipe ring piece for realizing stratum quick freezing according to claim 1, further comprising the steps of:
and the connecting channel is communicated with two rib plate cavities at the connected ends of two adjacent arc-shaped steel pipe sheets.
5. The processing method of the steel pipe ring piece for realizing stratum quick freezing according to claim 4, which is characterized in that: the connecting channel is a U-shaped pipe.
6. The processing method of the steel pipe ring piece for realizing stratum quick freezing according to claim 4, which is characterized in that: the water inlet interface and the water outlet interface are respectively communicated with two rib plate cavities at the connected ends of two adjacent arc-shaped steel pipe sheets.
7. The processing method of the steel pipe ring piece for realizing stratum quick freezing according to claim 6, which is characterized in that: the connecting ends of two adjacent arc steel pipe sheets provided with a water inlet connector and a water outlet connector are not provided with communication pipelines.
8. The processing method of the steel pipe ring piece for realizing stratum quick freezing according to claim 7, which is characterized in that: the water inlet interface and the water outlet interface are arranged at the joint ends of two adjacent arc-shaped steel pipe sheets with the lowest height positions in the steel pipe ring sheet.
9. The processing method of the steel pipe ring piece for realizing stratum quick freezing according to claim 4, which is characterized in that: the arc steel pipe sheet comprises K blocks and an adjacent block L 1 Adjacent block L 2 Standard block B 1 Standard block B 2 And standard block B 3 。
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| CN114165263B true CN114165263B (en) | 2023-10-27 |
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| US3183675A (en) * | 1961-11-02 | 1965-05-18 | Conch Int Methane Ltd | Method of freezing an earth formation |
| CN111963179A (en) * | 2020-08-24 | 2020-11-20 | 中交第三航务工程局有限公司 | Construction method for replacing shield tail brush through freezing reinforcement |
| CN112065403A (en) * | 2020-09-01 | 2020-12-11 | 中交第二航务工程局有限公司 | Steel tube sheet device for freezing soil around the tail of shield machine and its construction method |
| CN212927883U (en) * | 2020-08-24 | 2021-04-09 | 中交第三航务工程局有限公司 | Be used for shield tail brush to change ground floor freezing reinforced (rfd) steel-pipe piece |
| CN213269887U (en) * | 2020-09-01 | 2021-05-25 | 中交第二航务工程局有限公司 | Steel pipe sheet device for freezing soil around tail of shield tunneling machine |
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2021
- 2021-11-05 CN CN202111307185.7A patent/CN114165263B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3183675A (en) * | 1961-11-02 | 1965-05-18 | Conch Int Methane Ltd | Method of freezing an earth formation |
| CN111963179A (en) * | 2020-08-24 | 2020-11-20 | 中交第三航务工程局有限公司 | Construction method for replacing shield tail brush through freezing reinforcement |
| CN212927883U (en) * | 2020-08-24 | 2021-04-09 | 中交第三航务工程局有限公司 | Be used for shield tail brush to change ground floor freezing reinforced (rfd) steel-pipe piece |
| CN112065403A (en) * | 2020-09-01 | 2020-12-11 | 中交第二航务工程局有限公司 | Steel tube sheet device for freezing soil around the tail of shield machine and its construction method |
| CN213269887U (en) * | 2020-09-01 | 2021-05-25 | 中交第二航务工程局有限公司 | Steel pipe sheet device for freezing soil around tail of shield tunneling machine |
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| CN114165263A (en) | 2022-03-11 |
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