CN212270903U - Vertical shaft freezing pipe - Google Patents
Vertical shaft freezing pipe Download PDFInfo
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- CN212270903U CN212270903U CN202020443353.XU CN202020443353U CN212270903U CN 212270903 U CN212270903 U CN 212270903U CN 202020443353 U CN202020443353 U CN 202020443353U CN 212270903 U CN212270903 U CN 212270903U
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Abstract
The utility model discloses a shaft freezes pipe, include: the liquid distribution pipe comprises a pipe body, a first liquid supply pipe and a liquid distribution ring, wherein the pipe body comprises a local freezing area and a non-freezing area from bottom to top, an isolation pipe, the first liquid supply pipe and the liquid distribution ring are arranged outside the non-freezing area, the top end of the first liquid supply pipe is connected with the bottom end of the liquid distribution ring, and the bottom end of the first liquid supply pipe is communicated with the top end of the pipe body; the liquid collecting device comprises a second liquid supply pipe and a liquid collecting ring, wherein the top end of the second liquid supply pipe is connected with the bottom end of the liquid collecting ring, and the bottom end of the second liquid supply pipe extends into the pipe body. The vertical shaft freezing pipe is simple to operate and easy for technical workers to learn and actually operate; meanwhile, the freezing pipe is simple in structure, good in freezing effect and capable of saving engineering cost.
Description
Technical Field
The utility model relates to a railway construction technical field, in particular to shaft freezing system.
Background
The principle of the construction of the freezing waterproof curtain is that a low-temperature refrigerant is sent into a stratum for freezing through brine circulation in an artificial refrigeration mode, and an integral and high-strength curtain is finally formed along with the diffusion and the circling of a single freezing wall, so that the waterproof and pressure-bearing effects are achieved. Under the protection of a closed frozen earth wall, a special water stopping method for shaft excavation and primary support is carried out.
A certain underground excavated station of the Beijing subway is an underground three-layer three-span island type platform station, the station is constructed by adopting an underground excavated PBA construction method (4 pilot tunnels), and 3 construction vertical shafts are arranged in total. The vertical shaft is constructed by adopting an inverted well wall hanging method, the well depth is 37.881m, the thickness of a primary support is 350mm, and a support system is formed by sprayed concrete, a reinforcing mesh, a grid steel frame and a grouting anchor pipe.
The vertical shaft excavation depth range mainly comprises three layers of underground water, the front two layers of upper water retaining layers (I) and diving layers (II) are thin in vertical distribution range due to small water amount, deep hole grouting is adopted for water stopping, and the diving layer (III) starts from the position 9 meters away from the bottom of the vertical shaft and is mainly a pebble layer and pressure-bearing water. According to relevant regulations of Beijing city on strengthening underground water protection, the traditional direct precipitation method is cancelled, and a vertical freezing pipe is adopted to form a side wall and bottom waterproof curtain to achieve the waterproof effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a shaft freezes pipe is provided, it has overcome prior art's above-mentioned defect, and the stagnant water is effectual.
The utility model discloses the technical problem that solve is realized through following technical scheme:
a vertical shaft freezing tube comprising:
the tube body comprises a local freezing area and a non-freezing area from bottom to top, an isolation tube is arranged outside the non-freezing area,
the liquid distribution device comprises a first liquid supply pipe and a liquid distribution ring, wherein the top end of the first liquid supply pipe is connected with the bottom end of the liquid distribution ring, and the bottom end of the first liquid supply pipe is communicated with the top end of the pipe body;
the liquid collecting device comprises a second liquid supply pipe and a liquid collecting ring, wherein the top end of the second liquid supply pipe is connected with the bottom end of the liquid collecting ring, and the bottom end of the second liquid supply pipe extends into the pipe body.
Preferably, in the above technical scheme, heat preservation cotton is arranged between the isolation pipe and the pipe body at the non-freezing area.
Preferably, in the above technical scheme, an end cover plate is disposed at the upper end of the tube body, a first circular hole and a second circular hole are formed in the end cover plate, the bottom end of the first liquid supply tube is connected with the first circular hole to communicate the first liquid supply tube with the tube body, and the bottom end of the second liquid supply tube can penetrate through the second circular hole and penetrate into the tube body.
Preferably, in the above technical solution, the bottom end of the second liquid supply pipe is close to the bottom end of the pipe body.
Preferably, in the above technical solution, the pipe body is a low-carbon seamless steel pipe with a diameter of Φ 89 × 8 mm.
Preferably, in the above technical solution, the first liquid supply pipe and the second liquid supply pipe are low carbon seamless steel pipes with a diameter of Φ 48 × 3.5 mm.
Preferably, in the above technical scheme, the isolation pipe and the non-freezing area are connected by thread butt welding.
Preferably, in the above technical solution, the isolation pipe is a seamless steel pipe with a diameter of 133 × 3 mm.
Preferably, in the above technical solution, the height of the end cover plate above the ground is 300 mm.
Preferably, in the above technical scheme, the lower extreme of body is the cone structure, the height of cone is 80mm, the distance of second feed liquid bottom to the cone top is 400 mm.
The above technical scheme of the utility model, following beneficial effect has:
the vertical shaft freezing pipe is simple to operate and easy for technical workers to learn and actually operate; meanwhile, the freezing pipe is simple in structure, good in freezing effect and capable of saving engineering cost.
Drawings
Fig. 1 is a schematic view of the vertical shaft freezing pipe of the present invention.
Detailed Description
The following detailed description of the present invention is provided to facilitate further understanding of the invention.
Fig. 1 is a schematic view of the vertical shaft freezing pipe of the present invention. As shown in the figure:
a vertical shaft freezing tube comprising: body 1, feed pipe, liquid distribution circle and liquid collection circle. In detail:
the pipe body 1 comprises a local freezing area and a non-freezing area from bottom to top, an isolation pipe 8 is arranged outside the non-freezing area, and heat insulation cotton 3 is arranged between the isolation pipe 8 and the pipe body of the non-freezing area; the liquid distribution device comprises a first liquid supply pipe 2 and a liquid distribution ring 4, wherein the top end of the first liquid supply pipe 2 is connected with the bottom end of the liquid distribution ring 4, and the bottom end of the first liquid supply pipe 2 is communicated with the top end of a pipe body 1; the second liquid supply pipe 5 and the liquid collecting ring 6, the top end of the second liquid supply pipe 5 is connected with the bottom end of the liquid collecting ring 6, and the bottom end of the second liquid supply pipe 5 extends into the pipe body 1. The direction of the arrow is the direction of the freezing cycle.
Further, the upper end of body 1 is provided with end apron 7, offers first round hole and second round hole on the end apron 7, and the bottom of first feed pipe 2 links to each other with first round hole and realizes the UNICOM between first feed pipe and the body 1, and the bottom of second feed pipe 5 can pass the second round hole and go deep into to in the body 1. Further, the bottom end of the second liquid supply tube 5 is close to the bottom end of the tube body 1. In other words, the bottom end of the second supply tube 5 is disposed closely to the bottom end of the tube body 1.
Preferably, the pipe body 1 is a low carbon seamless steel pipe with a diameter of 89 × 8 mm. The first liquid supply pipe and the second liquid supply pipe are low-carbon seamless steel pipes with the diameter of phi 48 multiplied by 3.5 mm. The isolation pipe 8 is connected with the non-freezing area by screw thread butt welding. The isolation pipe 8 is a seamless steel pipe with the diameter of 133 multiplied by 3 mm. Of course, the present application is not limited thereto, and those skilled in the art can select appropriate size and material to replace the material according to the need.
Preferably, the height of the end cover plate 7 above the ground is 300 mm. The lower extreme of body 1 is the cone structure, and the height of cone is 80mm, and the distance of second feed pipe bottom to cone top is 400 mm.
The vertical shaft freezing pipe is simple to operate and easy for technical workers to learn and actually operate; meanwhile, the freezing pipe is simple in structure, good in freezing effect and capable of saving engineering cost.
Although the present invention has been described with reference to the above embodiments, it is not intended to limit the present invention, and various alternatives and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (10)
1. A vertical shaft freezing tube comprising:
the tube body (1) comprises a local freezing area and a non-freezing area from bottom to top, an isolation tube (8) is arranged outside the non-freezing area,
the liquid distribution device comprises a first liquid supply pipe (2) and a liquid distribution ring (4), wherein the top end of the first liquid supply pipe (2) is connected with the bottom end of the liquid distribution ring (4), and the bottom end of the first liquid supply pipe (2) is communicated with the top end of the pipe body (1);
the liquid collecting device comprises a second liquid supply pipe (5) and a liquid collecting ring (6), wherein the top end of the second liquid supply pipe (5) is connected with the bottom end of the liquid collecting ring (6), and the bottom end of the second liquid supply pipe (5) extends into the pipe body (1).
2. A shaft freezing pipe according to claim 1 characterized in that insulation cotton (3) is arranged between the isolation pipe (8) and the body of the non-freezing zone.
3. A shaft freezing pipe according to claim 1, characterized in that the upper end of the pipe body (1) is provided with an end cover plate (7), the end cover plate (7) is provided with a first circular hole and a second circular hole, the bottom end of the first liquid supply pipe (2) is connected with the first circular hole to realize the communication between the first liquid supply pipe and the pipe body (1), and the bottom end of the second liquid supply pipe (5) can penetrate through the second circular hole and go deep into the pipe body (1).
4. A shaft freezing pipe according to claim 1 wherein the bottom end of the second liquid supply pipe (5) is close to the bottom end of the pipe body (1).
5. A shaft freezing pipe according to claim 1 characterized in that said pipe body (1) is a low carbon seamless steel pipe of Φ 89 x 8 mm.
6. A vertical shaft freezing pipe according to claim 1 wherein said first liquid supply pipe and said second liquid supply pipe are low carbon seamless steel pipes of Φ 48 x 3.5 mm.
7. A shaft freezing pipe according to claim 1 wherein said isolation pipe (8) is screwed and butt welded to said non-freezing zone.
8. A vertical shaft freezing pipe according to claim 1 characterized in that said isolation pipe (8) is a seamless steel pipe of Φ 133 x 3 mm.
9. A shaft freezing tube according to claim 3 wherein the height of the end cap (7) above the ground is 300 mm.
10. A vertical shaft freezing pipe according to claim 1 wherein the lower end of the pipe body (1) is of a cone structure, the height of the cone is 80mm, and the distance from the bottom end of the second liquid supply pipe to the top end of the cone is 400 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020443353.XU CN212270903U (en) | 2020-03-31 | 2020-03-31 | Vertical shaft freezing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020443353.XU CN212270903U (en) | 2020-03-31 | 2020-03-31 | Vertical shaft freezing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212270903U true CN212270903U (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020443353.XU Active CN212270903U (en) | 2020-03-31 | 2020-03-31 | Vertical shaft freezing pipe |
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| Country | Link |
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| CN (1) | CN212270903U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305904A (en) * | 2022-08-22 | 2022-11-08 | 中煤第五建设有限公司 | Liquid nitrogen freezing construction method |
| CN118326944A (en) * | 2024-06-13 | 2024-07-12 | 石家庄铁道大学 | Local high-efficient controllable thermal insulation horizontal freezing pipe |
-
2020
- 2020-03-31 CN CN202020443353.XU patent/CN212270903U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305904A (en) * | 2022-08-22 | 2022-11-08 | 中煤第五建设有限公司 | Liquid nitrogen freezing construction method |
| CN115305904B (en) * | 2022-08-22 | 2024-04-26 | 中煤第五建设有限公司 | Liquid nitrogen freezing construction method |
| CN118326944A (en) * | 2024-06-13 | 2024-07-12 | 石家庄铁道大学 | Local high-efficient controllable thermal insulation horizontal freezing pipe |
| CN118326944B (en) * | 2024-06-13 | 2024-10-08 | 石家庄铁道大学 | Local high-efficient controllable thermal insulation horizontal freezing pipe |
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