CN111472343B - Bidirectional reinforced freezing device and working method - Google Patents
Bidirectional reinforced freezing device and working method Download PDFInfo
- Publication number
- CN111472343B CN111472343B CN202010195246.4A CN202010195246A CN111472343B CN 111472343 B CN111472343 B CN 111472343B CN 202010195246 A CN202010195246 A CN 202010195246A CN 111472343 B CN111472343 B CN 111472343B
- Authority
- CN
- China
- Prior art keywords
- freezing
- pipe
- straight
- spiral coil
- refrigerant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
Abstract
The invention discloses a bidirectional reinforced freezing device and a working method thereof, which are suitable for the technical field of artificial freezing of underground engineering. The freezing device comprises a spiral coil and a straight freezing pipe, wherein the straight freezing pipe and the spiral coil are vertically arranged, the freezing directions of the straight freezing pipe and the spiral coil are overlapped to form a bidirectional freezing effect, during freezing construction, the bidirectional strengthening freezing device is directly inserted into a weak position of a weak stratum or a freezing wall, a low-temperature refrigerant input through an inlet flows along the spiral coil, and flows out along an outlet of the coil after passing through the straight freezing pipe and the spiral coil respectively to finish a freezing cycle process. The straight freezing pipe of the bidirectional reinforced freezing device is inserted into a weak position of a soft stratum or a freezing wall, the device is directly fixed on the surface of the stratum without additional support, and the bidirectional freezing superposition of the spiral coil pipe and the straight freezing pipe forms a three-dimensional freezing mode, so that the freezing effect can be enhanced, the freezing efficiency is improved, and the construction cost is saved.
Description
Technical Field
The invention relates to a freezing device and a working method, in particular to a bidirectional reinforced freezing device and a working method which are suitable for weak strata or weak positions of a frozen wall in underground engineering construction.
Background
In the underground engineering construction, when complex geological conditions such as a water-rich soft soil stratum and the like are met, the soil layer is often reinforced by adopting an artificial freezing technology to improve the stratum performance so as to finish excavation and structural construction in the water-rich stratum. However, when freezing is performed, a weak position of a freezing wall often exists in some areas, or when a weak stratum exists around excavation, the potential safety hazard in engineering is caused, and the area needs to be subjected to reinforced freezing. The traditional freezing strengthening method is to arrange freezing pipes on a steel plate to form a cold plate, attach the cold plate to a soft freezing wall, and introduce a low-temperature refrigerant into the freezing pipes to strengthen freezing. Therefore, the cold plate can be frozen only in a single direction perpendicular to the plate surface, and the freezing efficiency is low and the effect is poor, and a long freezing time is required. And when vertically arranging the cold drawing, need take bearing structure to fix freezing the cold drawing, influence the inside construction space of freezing wall, hinder other work progress such as excavation, when a plurality of regions need arrange the cold drawing simultaneously and strengthen freezing, support work load is big, and it is very inconvenient to operate.
Disclosure of Invention
Aiming at the technical problems, the invention provides a structure which is simpler and aims at weak positions of weak stratums or frozen walls.
The novel device and the working method can fix the device on a weak stratum or a weak position of a freezing wall by utilizing the device and realize a three-dimensional freezing effect, namely the bidirectional reinforced freezing device and the working method.
In order to achieve the technical purpose, the bidirectional reinforced freezing device comprises a disc-shaped spiral coil, steel plates are arranged on the upper side and the lower side of a pipeline of the spiral coil, a plurality of straight freezing pipes are vertically arranged below the spiral coil through the steel plates, the ends of the straight freezing pipes are hermetically provided with conical structures, the straight freezing pipes and the spiral coil are in conduction connection through flowing into the freezing pipes and flowing out of the freezing pipes, a heat insulation layer is arranged on the surface of the steel plate above the spiral coil, and a refrigerant input pipe orifice and a refrigerant output pipe orifice which are communicated with the interior of the spiral coil end to end are respectively arranged on the surface of the steel plate above the spiral coil, wherein the refrigerant input pipe orifice is connected with the circle center end.
The spiral tube spacing of the spiral coil and the arrangement position, number, diameter and length of the straight freezing tubes are adjusted according to engineering requirements, wherein the number of the straight freezing tubes is five, and the straight freezing tubes are uniformly distributed in the plane of the whole freezing device so as to improve the vertical freezing speed and uniformity.
A freezing method of a bidirectional reinforced freezing device comprises the following steps:
a, inserting a straight freezing pipe of a bidirectional reinforced freezing device into a weak position of a weak stratum or a freezing wall to be frozen until a steel plate at the lower end of a spiral coil pipe tightly fastens the weak stratum or the surface of the freezing wall so as to fix the bidirectional reinforced freezing device;
b, injecting low-temperature refrigerant from a refrigerant input pipe orifice in a pressurized manner, enabling the low-temperature refrigerant to flow in the spiral coil pipe along a spiral path and finally flow out of a refrigerant output pipe orifice, enabling the low-temperature refrigerant to enter the straight freezing pipe through the inflow freezing pipe of the straight freezing pipe until the bottom of the straight freezing pipe carries out heat exchange when the low-temperature refrigerant flows through the straight freezing pipe, enabling the refrigerant after being released to be subjected to temperature rise and then to automatically generate positions to be alternated with the subsequently added low-temperature refrigerant and then to enter the outflow freezing pipe through the straight freezing pipe, and finally continuing to flow along the path of the spiral coil pipe, enabling the low-temperature refrigerant to flow through the whole spiral coil pipe and all the straight freezing pipes according to the flow path and finally flow out of the refrigerant output pipe orifice, completing the freezing process and forming a three-dimensional freezing wall on a weak stratum or a freezing wall to be frozen, so as to rapidly improve the, performing construction such as excavation;
and c, directly pulling out the bidirectional reinforced freezing device after freezing is finished, and cleaning the bidirectional reinforced freezing device for repeated use in other freezing projects.
Has the advantages that: according to the invention, the steel plates are arranged at the upper end and the lower end of the spiral coil pipe, so that the freezing is more uniform, the circulation path of low-temperature refrigerants is prolonged, and the freezing efficiency is improved; the bottom of the straight freezing pipe vertically arranged on the spiral coil pipe is of a conical structure, so that the device can be conveniently inserted into a soft soil layer or a weak position of a freezing wall and fixed without additional support, and the construction cost is saved; when a low-temperature refrigerant is injected, the development directions of the freezing walls formed by the spiral coil pipes and the vertical freezing pipes are overlapped to form a bidirectional freezing effect, and the overlapping effect of the bidirectional freezing effect can improve the freezing speed and the uniformity of the formed freezing walls.
Drawings
Fig. 1 is a schematic structural diagram of a bidirectional reinforced freezing device according to an embodiment of the present invention.
Fig. 2 is a connection diagram of the spiral coil and the straight freezing pipe in the bidirectional reinforced freezing device according to the embodiment of the invention.
In the figure: 1-steel plate, 2-spiral coil pipe, 3-straight freezing pipe, 4-conical structure, 5-refrigerant input pipe orifice, 6-refrigerant output pipe orifice, 7-inflow freezing pipe and 8-outflow freezing pipe
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced.
As shown in attached drawings 1 and 2, the bidirectional reinforced freezing device comprises a disc-shaped spiral coil 2, steel plates 1 are arranged on the upper side and the lower side of a pipeline of the spiral coil 2, as shown in fig. 2, a plurality of straight freezing pipes 3 are vertically arranged below the spiral coil 2 through the steel plates 1, the end parts of the straight freezing pipes 3 are hermetically provided with conical structures 4, the straight freezing pipes 3 are in conduction connection with the spiral coil 2 through inflow freezing pipes 7 and outflow freezing pipes 8, an insulating layer is arranged on the surface of the steel plate 1 above the spiral coil 2, and a refrigerant input pipe orifice 5 and a refrigerant output pipe orifice 6 which are communicated with the interior of the spiral coil 2 end to end are respectively arranged, wherein the refrigerant input pipe orifice 5 is connected with the circle center end of the spiral coil 2, and the refrigerant output pipe orifice 6 is connected with the outermost side end.
The distance between the spiral pipes of the spiral coil pipe 2 and the arrangement position, the number, the diameter and the length of the straight freezing pipes 3 are adjusted according to engineering requirements, wherein the number of the straight freezing pipes 3 is four, and the straight freezing pipes are uniformly distributed in the plane of the whole freezing device, so that the vertical freezing speed and the vertical freezing uniformity are improved.
A freezing method of a bidirectional reinforced freezing device comprises the following steps:
1) welding the top of the straight freezing pipe 3 on the steel plate 1, enabling the straight freezing pipe 3 to be vertically arranged with the steel plate 1, and processing the bottom end of the straight freezing pipe 3 into a conical structure 4 and sealing; fixing the spiral coil 2 on the surface of the steel plate 1, and connecting the pipe orifice of the straight freezing pipe 3 with the straight freezing pipe in a through manner to form a freezing circulation system; the surface of the spiral coil 2 is welded with another steel plate 1 for strengthening the fixing function, and the surface of the steel plate 1 is laid with a heat-insulating layer and is provided with a refrigerant input pipe orifice 5 and a refrigerant output pipe orifice 6.
2) Inserting a straight freezing pipe 3 of the bidirectional reinforced freezing device into a weak position of a weak stratum or a freezing wall to be frozen until a steel plate 1 at the lower end of a spiral coil pipe 2 tightly fastens the weak stratum or the freezing wall surface so as to fix the bidirectional reinforced freezing device;
3) the low-temperature refrigerant is pressurized and injected from the refrigerant input pipe orifice 5, flows along a spiral path in the spiral coil pipe 2 and finally flows out from the refrigerant output pipe orifice 6, when the low-temperature refrigerant flows through the straight freezing pipe 3, the low-temperature refrigerant enters the straight freezing pipe 3 through the inflow freezing pipe 7 of the straight freezing pipe 3 until the bottom of the straight freezing pipe carries out heat exchange, the temperature of the refrigerant after being released is raised, the refrigerant and the subsequently added low-temperature refrigerant automatically generate positions to be alternated and then enter the outflow freezing pipe 8 through the straight freezing pipe 3, the low-temperature refrigerant finally continues to flow along the path of the spiral coil pipe 2, and finally flows out from the refrigerant output pipe orifice 6 after flowing through the whole spiral coil pipe 2 and all the straight freezing pipes 3 according to the flow path,
4) finishing the freezing process and forming a three-dimensional frozen wall on the weak stratum or the frozen wall to be frozen, thereby quickly improving the strength of the weak position of the weak stratum or the frozen wall, and performing construction such as excavation under the maintenance action of the improved stratum;
5) after freezing, the bidirectional reinforced freezing device is directly pulled out and cleaned for repeated use in other freezing projects.
Claims (3)
1. A bidirectional reinforced freezing device is characterized in that: the spiral coil pipe comprises a disc-shaped spiral coil pipe (2), steel plates (1) are arranged on the upper side and the lower side of a pipeline of the spiral coil pipe (2), a plurality of straight freezing pipes (3) are vertically arranged below the spiral coil pipe (2) through the steel plates (1), the end parts of the straight freezing pipes (3) are hermetically provided with conical structures (4), the straight freezing pipes (3) and the spiral coil pipe (2) are communicated with the inside of an inflow freezing pipe (7) and an outflow freezing pipe (8), a heat insulation layer is arranged on the surface of the steel plate (1) above the spiral coil pipe (2), and a refrigerant input pipe orifice (5) and a refrigerant output pipe orifice (6) which are communicated with the inside of the spiral coil pipe (2) end to end are respectively formed, wherein the refrigerant input pipe orifice (5) is connected with the circle center end of the spiral coil pipe (2), and the refrigerant output pipe orifice; when a low-temperature refrigerant enters the straight freezing pipes (3) through inflow freezing pipes (7) of the straight freezing pipes (3) until the bottom of the straight freezing pipes is subjected to heat exchange, the temperature of the refrigerant after being released is increased, the refrigerant and a subsequently added low-temperature refrigerant automatically generate positions and alternately enter outflow freezing pipes (8) through the straight freezing pipes (3), and finally the refrigerant continuously flows along the path of the spiral coil (2), flows out of a refrigerant output pipe opening (6) according to the flow path after flowing through the whole spiral coil (2) and all the straight freezing pipes (3), and finishes the freezing process and forms a three-dimensional freezing wall on a soft stratum or a freezing wall to be frozen.
2. A bi-directional enhanced freezing apparatus as claimed in claim 1, wherein: the spiral tube spacing of the spiral coil (2) and the arrangement position, the number, the diameter and the length of the straight freezing tubes (3) are adjusted according to engineering requirements, wherein the number of the straight freezing tubes (3) is five, and the straight freezing tubes are uniformly distributed in the plane of the whole freezing device, so that the vertical freezing speed and the vertical freezing uniformity are improved.
3. A freezing method using the bi-directional enhanced freezing device of claim 1, characterized by the steps of:
a, inserting a straight freezing pipe (3) of a bidirectional reinforced freezing device into a weak position of a weak stratum or a frozen wall to be frozen until a steel plate (1) at the lower end of a spiral coil pipe (2) is tightly attached to the surface of the weak stratum or the frozen wall so as to fix the bidirectional reinforced freezing device;
b, injecting low-temperature refrigerant under pressure from a refrigerant input pipe orifice (5), enabling the low-temperature refrigerant to flow in the spiral coil pipe (2) along a spiral path and finally flow out of a refrigerant output pipe orifice (6), enabling the low-temperature refrigerant to enter the straight freezing pipe (3) through an inflow freezing pipe (7) of the straight freezing pipe (3) until the bottom of the straight freezing pipe (3) to exchange heat when the low-temperature refrigerant flows through the straight freezing pipe (3), enabling the released refrigerant to flow continuously along the path of the spiral coil pipe (2) after the temperature of the released refrigerant rises and the automatic generation position of the subsequently added low-temperature refrigerant to alternate with each other and then enter an outflow freezing pipe (8) through the straight freezing pipe (3), enabling the low-temperature refrigerant to flow out of the refrigerant output pipe orifice (6) after flowing through the whole spiral coil pipe (2) and all straight freezing pipes (3) according to the flow path, completing the freezing process and forming a three-dimensional freezing wall on a soft stratum, therefore, the strength of the weak stratum or the weak position of the frozen wall is quickly improved, and excavation construction is carried out under the maintenance action of the improved stratum;
and c, directly pulling out the bidirectional reinforced freezing device after freezing is finished, and cleaning the bidirectional reinforced freezing device for repeated use in other freezing projects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195246.4A CN111472343B (en) | 2020-03-19 | 2020-03-19 | Bidirectional reinforced freezing device and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195246.4A CN111472343B (en) | 2020-03-19 | 2020-03-19 | Bidirectional reinforced freezing device and working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111472343A CN111472343A (en) | 2020-07-31 |
| CN111472343B true CN111472343B (en) | 2021-07-09 |
Family
ID=71747742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010195246.4A Active CN111472343B (en) | 2020-03-19 | 2020-03-19 | Bidirectional reinforced freezing device and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111472343B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089707B (en) * | 2021-03-30 | 2022-01-14 | 海南大学 | Artificial stratum freezing system and method adopting combined refrigeration of liquid nitrogen and saline water |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276720A (en) * | 2013-05-31 | 2013-09-04 | 中国矿业大学 | Soft soil subgrade freezing reinforcement method |
| CN205999882U (en) * | 2016-09-13 | 2017-03-08 | 海南大学 | The manual pipe jacking device of underwater desilting, sampling and salvaging |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6687976B2 (en) * | 2016-03-16 | 2020-04-28 | ケミカルグラウト株式会社 | Freezing method |
| CN207131404U (en) * | 2017-07-24 | 2018-03-23 | 中铁二院工程集团有限责任公司 | Railway tunnel ultra-deep shaft construction freezing method structural system |
| CN108035335B (en) * | 2017-09-30 | 2019-12-20 | 中煤第五建设有限公司 | Method for constructing shaft type underground parking garage by freezing method |
-
2020
- 2020-03-19 CN CN202010195246.4A patent/CN111472343B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276720A (en) * | 2013-05-31 | 2013-09-04 | 中国矿业大学 | Soft soil subgrade freezing reinforcement method |
| CN103276720B (en) * | 2013-05-31 | 2015-12-02 | 中国矿业大学 | A kind of soft soil roadbed consolidation by freezing method |
| CN205999882U (en) * | 2016-09-13 | 2017-03-08 | 海南大学 | The manual pipe jacking device of underwater desilting, sampling and salvaging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111472343A (en) | 2020-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111472343B (en) | Bidirectional reinforced freezing device and working method | |
| DE112016002341T5 (en) | In a prefabricated tubular pile embedded heat transfer tube and its embedding method | |
| CN206090315U (en) | Concrete water cooling system | |
| CN102912729B (en) | Automatic movable die carrier cast-in-place box girder concrete curing device | |
| CN103603313B (en) | Rectifier wall structure of making flow by deep water, and construction method thereof | |
| CN103194579B (en) | Device and method for reducing X80 pipeline steel welded joint residual stress | |
| CN110984124B (en) | Spiral liquid nitrogen freezer and method | |
| CN202731930U (en) | Shield segment for compensating freezing at metro connecting passage part | |
| CN103277115A (en) | Segment and segment ring used for indoor tunneling test of shield tunneling machine model | |
| CN206478303U (en) | The supporting structure of heat distribution pipeline in pipe gallery | |
| CN104846808A (en) | Heat exchanging hollow pile and construction method thereof | |
| CN114892665B (en) | Construction method of large-volume concrete cooling water pipe | |
| CN111927463B (en) | Freezing pipe arrangement method in multi-row pipe freezing engineering | |
| CN115522531A (en) | Freezing system and construction method of elevator shaft or sump based on freezing method | |
| CN110805023B (en) | Special-shaped liquid nitrogen freezer and production and construction method | |
| CN110984125B (en) | Sectional control type liquid nitrogen freezer and working method | |
| CN110984123B (en) | Spiral liquid nitrogen freezer with external liquid supply pipe and method | |
| CN111472367B (en) | Freezing anchoring combined freezing cold plate and method | |
| CN211816202U (en) | Novel drilling and pouring energy pile in pipe arrangement form | |
| CN203271764U (en) | Pipe piece and pipe piece ring for model shield tunneling machine indoor tunneling experiment | |
| CN207170454U (en) | Bubble column on-line cleaning device | |
| CN207047836U (en) | Hold energy stake and its system in end | |
| CN106016837A (en) | Energy collecting and accumulating device based on piled raft foundation | |
| CN101446444B (en) | Embedding device for underground heat exchanger of earth source heat pump | |
| CN111237848B (en) | Direct heating device utilizing abandoned mine and construction method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |