CN116164166A - Freezing construction auxiliary equipment and method for grooving buried pipe - Google Patents
Freezing construction auxiliary equipment and method for grooving buried pipe Download PDFInfo
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- CN116164166A CN116164166A CN202310118173.2A CN202310118173A CN116164166A CN 116164166 A CN116164166 A CN 116164166A CN 202310118173 A CN202310118173 A CN 202310118173A CN 116164166 A CN116164166 A CN 116164166A
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- 238000007710 freezing Methods 0.000 title claims abstract description 154
- 230000008014 freezing Effects 0.000 title claims abstract description 154
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000009412 basement excavation Methods 0.000 claims abstract description 16
- 238000007596 consolidation process Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 35
- 239000002689 soil Substances 0.000 claims description 30
- 239000012530 fluid Substances 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 15
- 239000012267 brine Substances 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 9
- 239000003673 groundwater Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 4
- 238000002679 ablation Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 238000013508 migration Methods 0.000 abstract description 5
- 230000005012 migration Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides freezing construction auxiliary equipment and a method for a grooved buried pipe, wherein the freezing construction auxiliary equipment comprises vertical freezing pipes which are vertically arranged with the ground, and the vertical freezing pipes are symmetrically arranged along two sides of a pipe position to be constructed; oblique freezing pipes which are obliquely arranged are arranged between the adjacent vertical freezing pipes, and the oblique freezing pipes are symmetrically arranged at two sides of the to-be-constructed pipe position; the vertical freezing pipe and the inclined freezing pipe are connected with the freezing station through a circulating pipeline, and freezing consolidation is carried out on the periphery of the to-be-constructed pipe position. By adopting a freezing method, the effective support of trench excavation is realized under the condition of not driving steel sheet piles, the pipeline migration is avoided, the construction investment is effectively reduced, the construction period is shortened, and the construction safety is ensured; the method is suitable for grooving buried pipe construction when underground pipelines are complex and the underground water level is high and steel sheet pile support cannot be carried out.
Description
Technical Field
The invention belongs to the field of municipal engineering drainage pipeline construction, and particularly relates to freezing construction auxiliary equipment for a grooved buried pipe and a using method thereof.
Background
The slotted buried pipe is a common process for newly constructing (or repairing) a drainage pipe network, the underground water level of a city along the middle and downstream of a Yangtze river is generally higher, and part of underground pipelines are extremely complex, so that steel sheet pile support cannot be performed, and other pipelines can be damaged if the steel sheet pile is forcibly driven; if the steel sheet pile is not driven to directly excavate, construction cannot be performed due to collapse of a groove or water burst, and a large potential safety hazard exists; if the pipeline is changed, the time and the cost are long, and some of the pipeline cannot be changed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the freezing construction auxiliary equipment and the freezing construction method for grooving buried pipes, which realize effective support of trench excavation under the condition of not driving steel sheet piles by adopting a freezing method, avoid pipeline migration and modification, effectively reduce construction investment, shorten construction period and ensure construction safety; the method is suitable for grooving buried pipe construction when underground pipelines are complex and the underground water level is high and steel sheet pile support cannot be carried out.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the freezing construction auxiliary equipment for grooving buried pipes comprises vertical freezing pipes which are arranged vertically to the ground, wherein the vertical freezing pipes are symmetrically arranged along two sides of a pipe position to be constructed;
oblique freezing pipes which are obliquely arranged are arranged between the adjacent vertical freezing pipes, and the oblique freezing pipes are symmetrically arranged at two sides of the to-be-constructed pipe position;
the vertical freezing pipe and the inclined freezing pipe are connected with the freezing station through a circulating pipeline, and freezing consolidation is carried out on the periphery of the to-be-constructed pipe position.
The vertical freezing pipe and the inclined freezing pipe adopt the same structure, the cross section is a hollow anti-corrosion metal pipe with good thermal conductivity and a baffle in a theta-shaped section, one end of the anti-corrosion metal pipe is a tip, soil mass can be conveniently inserted into the anti-corrosion metal pipe, liquid can enter from a top hole on one side of the theta-shaped section of the freezing pipe, flow into a top hole on the other side of the theta-shaped section of the freezing pipe after flowing into the tip, and then flow out reversely.
The circulating pipeline comprises a main pipe connected to the liquid outlet of the refrigerating station, and the main pipe is connected with inlets of the vertical refrigerating pipe and the inclined refrigerating pipe through a plurality of branch liquid inlet pipes; the outlets of the vertical freezing pipe and the inclined freezing pipe are connected with a liquid return pipe through a branch liquid return pipe, and the liquid return pipe is connected with a liquid return port of the freezing station.
And a temperature monitoring device is arranged at the position of the supply pipe and the reflux pipe orifice of the freezing station respectively, and the temperature of the freezing liquid is monitored in real time.
And a power pump is arranged in the refrigerating station and provides power for circulation of refrigerating fluid.
The method for grooving construction by adopting the freezing construction auxiliary equipment for grooving buried pipes comprises the following steps:
step one, investigation or equipment detection is adopted to determine the condition of the underground pipeline at the position to be constructed, and marking is carried out; and confirm the condition of the groundwater level, if the groundwater level is lower than expected, can consider to excavate the soil covering above the groundwater level step by step first, in order to improve the security;
selecting a vertical freezing pipe and an inclined freezing pipe with proper lengths, inserting the vertical freezing pipe and the inclined freezing pipe along two sides of a to-be-constructed pipe position, wherein the distance between the vertical freezing pipe and the inclined freezing pipe is not too large, and the soil and water at two sides and the bottom of the to-be-constructed pipe position are ensured to be completely frozen; meanwhile, the existing underground pipeline should be avoided;
step three, arranging a circulating pipeline and a refrigerating station, wherein the refrigerating station is close to the to-be-constructed position as much as possible so as to reduce the arrangement length of the circulating pipeline, and meanwhile, avoiding the subsequent excavation position and reserving a mechanical field access channel;
step four, connecting a main pipe of the circulating pipeline with inlets of the vertical freezing pipe and the inclined freezing pipe one by using a branch liquid inlet pipe, connecting a liquid return pipe of the circulating pipeline with outlets of the vertical freezing pipe and the inclined freezing pipe, and arranging a switch on the connecting pipe, wherein the opening degree can be controlled;
step five, adding enough high-concentration brine into the refrigerating station as refrigerating fluid, switching on a power supply of the refrigerating station, cooling the refrigerating fluid by the refrigerating station, gradually reducing the temperature of the refrigerating fluid, and enabling the refrigerating fluid to circularly flow by a power pump in the refrigerating station; the soil around the vertical freezing pipe and the inclined freezing pipe is gradually frozen, the vertical freezing pipe mainly freezes the soil on the side face of the groove at the position to be constructed, the inclined freezing pipe mainly freezes the soil on the bottom of the groove at the position to be constructed, and finally a wrapped U-shaped freezing surface is formed, so that the functions of supporting and water stopping are achieved;
monitoring the temperature of the refrigerating fluid through temperature monitoring equipment on a refrigerating station, monitoring the temperature of the soil body through a temperature sensor buried in a temperature measuring hole, starting trench excavation after the temperature is reduced to a certain degree below zero and maintained for a period of time, synchronously monitoring the temperature condition of the soil body at the position of the empty face after excavation, covering an insulating layer on the soil body at the position of the empty face, and avoiding excessive high temperature ablation instability;
step seven, after the excavation is carried out to the designed elevation position, foundation treatment and pipeline installation are carried out according to the design requirement, and backfilling compaction construction is carried out;
and step eight, after construction is completed, a freezing power supply and a power pump power supply of the freezing station are turned off, the temperature of soil is monitored through a temperature sensor buried in a temperature measuring hole, and when the temperature rises to above zero, high-concentration brine in the equipment is replaced by clear water, so that the high-concentration brine is synchronously recovered.
And step nine, removing the refrigerating station and the circulating pipeline, pulling out the vertical refrigerating pipe and the inclined refrigerating pipe one by one, and filling and backfilling the holes.
In the second step, a certain number of temperature measuring holes are arranged between the vertical freezing pipe and the inclined freezing pipe according to the requirement, and temperature sensors are buried in the temperature measuring holes and used for temperature monitoring in the process.
The invention has the beneficial effects that:
1. the invention can solve the problems of supporting and water blocking on the premise of not carrying out pipeline migration on the areas with complex underground pipelines and higher water level, can not adopt conventional steel sheet pile supporting and can not effectively block underground water, so that slotting construction can be smoothly implemented under the condition of ensuring safety.
2. By adopting a freezing method, the effective support of trench excavation is realized under the condition of not driving steel sheet piles, the pipeline migration is avoided, the construction investment is effectively reduced, the construction period is shortened, and the construction safety is ensured; the method is suitable for grooving buried pipe construction when underground pipelines are complex and the underground water level is high and steel sheet pile support cannot be carried out.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a front view of a cryopipe of the present invention.
FIG. 2 is a diagram showing circulation of a refrigerant liquid in the freezing pipe according to the present invention.
Fig. 3 is a front view of a vertical and diagonal freeze pipe arrangement of the present invention.
Fig. 4 is a top view of a vertical and diagonal freeze pipe arrangement of the present invention.
Fig. 5 is a block diagram of the arrangement of the refrigerating station of the present invention.
FIG. 6 is a diagram showing circulation of a refrigerant liquid during the construction of the present invention.
In the figure: the vertical freezing pipe 1, the inclined freezing pipe 2, the freezing station 3, the construction site 4, the main pipe 5, the liquid return pipe 6, the branch liquid inlet pipe 7 and the branch liquid return pipe 8.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-6, a freezing construction auxiliary device for grooving buried pipes comprises a vertical freezing pipe 1 which is vertically arranged with the ground, wherein the vertical freezing pipe 1 is symmetrically arranged along two sides of a pipe position 4 to be constructed; oblique freezing pipes 2 which are obliquely arranged are arranged between the adjacent vertical freezing pipes 1, and the oblique freezing pipes 2 are symmetrically arranged at two sides of a construction pipe position 4; the vertical freezing pipe 1 and the inclined freezing pipe 2 are connected with the freezing station 3 through a circulating pipeline, and freezing and solidifying are carried out on the periphery of the construction site 4. By adopting a freezing method, the effective support of trench excavation is realized under the condition of not driving steel sheet piles, the pipeline migration is avoided, the construction investment is effectively reduced, the construction period is shortened, and the construction safety is ensured; the method is suitable for grooving buried pipe construction when underground pipelines are complex and the underground water level is high and steel sheet pile support cannot be carried out.
Furthermore, the vertical freezing pipe 1 and the inclined freezing pipe 2 adopt the same structure, the cross section is a hollow anti-corrosion metal pipe with a baffle in a theta type, one end of the anti-corrosion metal pipe is a tip, the anti-corrosion metal pipe is convenient to insert into soil, and liquid can enter from a top hole on one side of the theta cross section of the freezing pipe, enter into a top hole on the other side of the theta cross section of the freezing pipe after flowing to the tip, and then reversely flow out. Through adopting foretell structure, can realize the circulation recovery of refrigerant fluid, and then be convenient for realize lasting refrigeration operation.
Further, the circulating pipeline comprises a main pipe 5 connected to the liquid outlet of the refrigerating station 3, and the main pipe 5 is connected with inlets of the vertical refrigerating pipe 1 and the inclined refrigerating pipe 2 through a plurality of branch liquid inlet pipes 7; the outlets of the vertical freezing pipe 1 and the inclined freezing pipe 2 are connected with a liquid return pipe 6 through a branch liquid return pipe 8, and the liquid return pipe 6 is connected with a liquid return port of the freezing station 3. The circulating recovery of the refrigerating fluid can be realized through the circulating pipeline, so that the continuous refrigerating operation can be realized conveniently.
Further, a temperature monitoring device is arranged at the position of the supply pipe and the reflux pipe opening of the freezing station 3 respectively, and the temperature of the freezing liquid is monitored in real time. The temperature detection device can be used for detecting the temperature, so that the optimal freezing effect is realized.
Further, a power pump is arranged in the refrigerating station 3 to provide power for circulation of refrigerating fluid.
Example 2:
the method for grooving construction by adopting the freezing construction auxiliary equipment for grooving buried pipes comprises the following steps:
step one, investigation or equipment detection is adopted to determine the condition of the underground pipeline at the position to be constructed, and marking is carried out; and confirm the condition of the groundwater level, if the groundwater level is lower than expected, can consider to excavate the soil covering above the groundwater level step by step first, in order to improve the security;
selecting a vertical freezing pipe 1 and an inclined freezing pipe 2 with proper lengths, inserting the vertical freezing pipe 1 and the inclined freezing pipe 2 along two sides of a to-be-constructed pipe position 4, wherein the distance between the vertical freezing pipe 1 and the inclined freezing pipe 2 is not excessively large, and the soil and water at the two sides and the bottom of the to-be-constructed pipe position 4 are ensured to be completely frozen; meanwhile, the existing underground pipeline should be avoided;
step three, arranging a circulating pipeline and a refrigerating station 3, wherein the refrigerating station 3 is required to be close to a construction position as much as possible so as to reduce the arrangement length of the circulating pipeline, meanwhile, avoiding the subsequent excavation position, and reserving a mechanical field access channel;
step four, a main pipe 5 of the circulation pipeline is connected with inlets of the vertical freezing pipe 1 and the inclined freezing pipe 2 by using a branch liquid inlet pipe 7 one by one, a liquid return pipe 6 of the circulation pipeline is connected with outlets of the vertical freezing pipe 1 and the inclined freezing pipe 2, and a switch is arranged on the connecting pipe and can control the opening degree;
step five, adding enough high-concentration brine into the refrigerating station 3 as refrigerating fluid, switching on a power supply of the refrigerating station 3, cooling the refrigerating fluid by the refrigerating station 3, gradually reducing the temperature of the refrigerating fluid, and enabling the refrigerating fluid to circularly flow by a power pump in the refrigerating station 3; the soil around the vertical freezing pipe 1 and the inclined freezing pipe 2 is gradually frozen, the vertical freezing pipe 1 mainly freezes the soil on the side surface of the groove at the position to be constructed, the inclined freezing pipe 2 mainly freezes the soil on the bottom of the groove at the position to be constructed, and finally a wrapped U-shaped freezing surface is formed, so that the functions of supporting and water stopping are achieved;
step six, monitoring the temperature of the refrigerating fluid through temperature monitoring equipment on the refrigerating station 3, monitoring the temperature of the soil body through a temperature sensor buried in a temperature measuring hole, starting trench excavation after the temperature is reduced to a certain degree below zero and maintained for a period of time, synchronously monitoring the temperature condition of the soil body at the position of the empty face after excavation, covering an insulating layer on the soil body at the position of the empty face, and avoiding excessive high temperature ablation instability;
step seven, after the excavation is carried out to the designed elevation position, foundation treatment and pipeline installation are carried out according to the design requirement, and backfilling compaction construction is carried out;
and step eight, after construction is completed, a freezing power supply and a power pump power supply of the freezing station 3 are turned off, the temperature of soil is monitored through a temperature sensor buried in a temperature measuring hole, and when the temperature rises to above zero, high-concentration brine in the equipment is replaced by clear water, so that the high-concentration brine is synchronously recovered.
And step nine, removing the refrigerating station 3 and the circulating pipeline, pulling out the vertical refrigerating pipe 1 and the inclined refrigerating pipe 2 one by one, and filling and backfilling the holes.
In the second step, a certain number of temperature measuring holes are arranged between the vertical freezing pipe 1 and the inclined freezing pipe 2 according to the requirement, and temperature sensors are embedded in the temperature measuring holes and used for monitoring the temperature in the process.
Claims (7)
1. The auxiliary freezing construction equipment for grooving buried pipes is characterized by comprising vertical freezing pipes (1) which are vertically arranged with the ground, wherein the vertical freezing pipes (1) are symmetrically arranged along two sides of a pipe position (4) to be constructed;
oblique freezing pipes (2) which are obliquely arranged are arranged between the adjacent vertical freezing pipes (1), and the oblique freezing pipes (2) are symmetrically arranged at two sides of a pipe position (4) to be constructed;
the vertical freezing pipe (1) and the inclined freezing pipe (2) are connected with the freezing station (3) through a circulating pipeline, and freezing consolidation is carried out on the periphery of the construction-planned pipe position (4).
2. The auxiliary freezing construction equipment for grooving buried pipes according to claim 1, wherein the vertical freezing pipe (1) and the inclined freezing pipe (2) adopt the same structure, the cross section is a hollow anti-corrosion metal pipe with a baffle in a theta type, one end of the anti-corrosion metal pipe is a tip, the anti-corrosion metal pipe is convenient to insert into soil, and liquid can enter from a top hole on one side of the theta cross section of the freezing pipe, flow into a top hole on the other side of the theta cross section of the freezing pipe after flowing to the tip, and then flow out reversely.
3. The auxiliary freezing construction equipment for grooving buried pipes according to claim 1, wherein the circulating pipeline comprises a main pipe (5) connected to a liquid outlet of the freezing station (3), and the main pipe (5) is connected with inlets of the vertical freezing pipe (1) and the inclined freezing pipe (2) through a plurality of branch liquid inlet pipes (7); the outlets of the vertical freezing pipe (1) and the inclined freezing pipe (2) are connected with a liquid return pipe (6) through a branch liquid return pipe (8), and the liquid return pipe (6) is connected with a liquid return port of the freezing station (3).
4. A construction freezing aid for slotted buried pipes according to claim 3, characterised in that the supply pipe and return pipe openings of the freezing station (3) are each provided with a temperature monitoring device and the temperature of the freezing liquid is monitored in real time.
5. A construction freezing aid for slotted pipes according to claim 3, characterized in that the freezing station (3) is internally provided with a power pump for powering the circulation of the freezing fluid.
6. A method for grooving operations using a freezing operation auxiliary device for grooving buried pipes according to any one of claims 1 to 5, comprising the steps of:
step one, investigation or equipment detection is adopted to determine the condition of the underground pipeline at the position to be constructed, and marking is carried out; and confirm the condition of the groundwater level, if the groundwater level is lower than expected, can consider to excavate the soil covering above the groundwater level step by step first, in order to improve the security;
selecting a vertical freezing pipe (1) and an inclined freezing pipe (2) with proper lengths, inserting the vertical freezing pipe (1) and the inclined freezing pipe (2) along two sides of a to-be-constructed pipe position (4), wherein the distance between the vertical freezing pipe (1) and the inclined freezing pipe (2) is not excessively large, and the soil and water at two sides and the bottom of the to-be-constructed pipe position (4) are ensured to be completely frozen; meanwhile, the existing underground pipeline should be avoided;
step three, arranging a circulating pipeline and a refrigerating station (3), wherein the refrigerating station (3) is required to be close to a construction position as much as possible so as to reduce the arrangement length of the circulating pipeline, and meanwhile, the subsequent excavation position is required to be avoided, and a mechanical field access channel is reserved;
step four, a main pipe (5) of the circulating pipeline is connected with inlets of the vertical freezing pipe (1) and the inclined freezing pipe (2) one by using a branch liquid inlet pipe (7), a liquid return pipe (6) of the circulating pipeline is connected with outlets of the vertical freezing pipe (1) and the inclined freezing pipe (2), and a switch is arranged on the connecting pipe and can control the opening degree;
step five, adding enough high-concentration brine into the refrigerating station (3) as refrigerating fluid, switching on a power supply of the refrigerating station (3), cooling the refrigerating fluid by the refrigerating station (3), gradually reducing the temperature of the refrigerating fluid, and enabling the refrigerating fluid to circularly flow by a power pump in the refrigerating station (3); the soil around the vertical freezing pipe (1) and the inclined freezing pipe (2) is gradually frozen, the vertical freezing pipe (1) mainly freezes the soil on the side surface of the groove at the position to be constructed, the inclined freezing pipe (2) mainly freezes the soil at the bottom of the groove at the position to be constructed, and finally a wrapped U-shaped freezing surface is formed, so that the functions of supporting and water stopping are achieved;
monitoring the temperature of the refrigerating fluid through temperature monitoring equipment on a refrigerating station (3), monitoring the temperature of the soil body through a temperature sensor buried in a temperature measuring hole, starting trench excavation after the temperature is reduced to a certain degree below zero and maintained for a period of time, synchronously monitoring the temperature condition of the soil body at the position of the temporary surface after excavation, and covering an insulating layer on the soil body at the position of the temporary surface to avoid excessive temperature ablation instability;
step seven, after the excavation is carried out to the designed elevation position, foundation treatment and pipeline installation are carried out according to the design requirement, and backfilling compaction construction is carried out;
step eight, after construction is completed, a freezing power supply and a power pump power supply of the freezing station (3) are turned off, the temperature of soil is monitored through a temperature sensor buried in a temperature measuring hole, when the temperature rises to above zero, high-concentration brine in the equipment is replaced by clear water, and the high-concentration brine is synchronously recovered;
and step nine, removing the freezing station (3) and the circulating pipeline, pulling out the vertical freezing pipe (1) and the inclined freezing pipe (2) one by one, and filling and backfilling the holes.
7. The method for grooving process by using the auxiliary equipment for grooving process according to claim 6, wherein in the second step, a certain number of temperature measuring holes are arranged between the vertical freezing pipe (1) and the inclined freezing pipe (2) according to the requirement, and temperature sensors are embedded in the temperature measuring holes for monitoring the temperature in the process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310118173.2A CN116164166B (en) | 2023-02-15 | Freezing construction auxiliary equipment and method for grooving buried pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310118173.2A CN116164166B (en) | 2023-02-15 | Freezing construction auxiliary equipment and method for grooving buried pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116164166A true CN116164166A (en) | 2023-05-26 |
| CN116164166B CN116164166B (en) | 2024-05-10 |
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| CN108825247A (en) * | 2018-06-20 | 2018-11-16 | 北京城建集团有限责任公司 | A kind of flare sidewall horizontal for 8 pilot tunnel PBA engineering methods makes bottom basin shape and freezes sealing engineering method |
| CN208547147U (en) * | 2018-07-03 | 2019-02-26 | 中国地质大学（北京） | A kind of underground buried tube heat-exchanger rig |
| CN111945704A (en) * | 2020-08-13 | 2020-11-17 | 中铁二十局集团第一工程有限公司 | Method for reinforcing water-rich silt stratum by obliquely arranging multiple rows of freezing pipes |
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| CN108457306A (en) * | 2018-06-20 | 2018-08-28 | 北京城建集团有限责任公司 | A kind of pile pipe collaboration upright side walls level being used for 4/6 pilot tunnel PBA engineering methods makes bottom basin shape and freezes sealing engineering method |
| CN108825247A (en) * | 2018-06-20 | 2018-11-16 | 北京城建集团有限责任公司 | A kind of flare sidewall horizontal for 8 pilot tunnel PBA engineering methods makes bottom basin shape and freezes sealing engineering method |
| CN208547147U (en) * | 2018-07-03 | 2019-02-26 | 中国地质大学（北京） | A kind of underground buried tube heat-exchanger rig |
| CN111945704A (en) * | 2020-08-13 | 2020-11-17 | 中铁二十局集团第一工程有限公司 | Method for reinforcing water-rich silt stratum by obliquely arranging multiple rows of freezing pipes |
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