WO2020244677A1 - 联络通道的冻结施工方法及冻结系统 - Google Patents
联络通道的冻结施工方法及冻结系统 Download PDFInfo
- Publication number
- WO2020244677A1 WO2020244677A1 PCT/CN2020/099045 CN2020099045W WO2020244677A1 WO 2020244677 A1 WO2020244677 A1 WO 2020244677A1 CN 2020099045 W CN2020099045 W CN 2020099045W WO 2020244677 A1 WO2020244677 A1 WO 2020244677A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- freezing
- pipe
- temperature
- brine
- hole
- Prior art date
Links
- 238000007710 freezing Methods 0.000 title claims abstract description 314
- 230000008014 freezing Effects 0.000 title claims abstract description 314
- 238000010276 construction Methods 0.000 title claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000005553 drilling Methods 0.000 claims abstract description 23
- 238000009412 basement excavation Methods 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 10
- 239000012267 brine Substances 0.000 claims description 92
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 92
- 150000003839 salts Chemical class 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 34
- 239000000498 cooling water Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 23
- 230000008569 process Effects 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- 238000005755 formation reaction Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- E21D9/008—Driving transverse tunnels starting from existing tunnels
Definitions
- the invention relates to the technical field of tunnel excavation, in particular to a freezing construction method and a freezing system of a connecting passage.
- Tunnel freezing construction methods are mainly used in areas with poor geological environment, such as unstable rock formations, which may collapse during the construction process, such as environments that are not conducive to the project or are dangerous to the construction personnel.
- the principle of this method is to use low temperature to stabilize the rock formation and facilitate construction.
- the freezing method is suitable for geology with large water content and loose gravel, such as round gravel layer, weathered mudstone and sand liquefaction.
- the round gravel layer is a medium-permeable layer with abundant water volume. Large seepage water may occur during the construction of the freezing hole, resulting in the risk of running soil, piping, and broken pipes in the borehole.
- the weathered mudstone rock mass is uneven in soft and hard, and has poor uniformity. It is easy to cause problems such as drilling offset and skew.
- the drilling construction is difficult and has a certain impact on the construction quality.
- the foundation after sand liquefaction is unfavorable to the project and is prone to liquefaction and subsidence. Corresponding anti-liquefaction measures should be taken to eliminate the impact of the liquefied soil layer on the project; shallow natural gas may exist locally, and monitoring should be strengthened during construction.
- the connecting passage is a passage set between two tunnels, generally used for fire prevention, ventilation, emergency evacuation, etc.
- a geological environment such as pebble layer, weathered mudstone and sand liquefaction
- horizontal freezing method is adopted Reinforce the stratum and underground mining construction, that is, use horizontal freezing in the tunnel to reinforce the stratum to freeze the surrounding soil of the connecting passage to form a frozen wall with high strength and good sealing, and then connect under the protection of the frozen wall.
- the advantage of this method is that the environment after freezing is better, which is conducive to construction, and has no pollution to the environment, and is conducive to underground construction. Its disadvantage is that the cost may be high, the surrounding environment is required, and it is best to have more water. The construction period will be extended.
- the purpose of the present invention is to provide a method and system for the freezing construction of the connecting channel.
- the second opening process is adopted in the opening stage to prevent a large amount of mud and water from being drilled through the tunnel segments; during the freezing process, each group is detected and analyzed
- the salt water temperature of the freezer changes to ensure the safety of the construction of the connection channel.
- the present invention provides a freezing construction method of a connecting passage.
- the freezing construction method of the connecting passage includes the following steps:
- Step S1 Arrange multiple freezing holes, multiple temperature measurement holes and multiple pressure relief holes on both sides of the connecting channel, and use the freezing pipe, temperature measurement pipe and pressure relief pipe as the corresponding freezing holes and measurement Warm hole and pressure relief hole;
- Step S2 Set up the freezing station in the tunnel on one side of the connecting passage, and lay multiple rows of freezing pipes along the frozen wall of the tunnel on the opposite side of the freezing station, and set up multiple pairs of perforations between the tunnels on both sides. Freezing holes and freezing pipes in the opposite tunnel provide cooling;
- Step S3 Set up a freezing system at the freezing station, debug and run the freezing system
- Step S4 Actively freeze the soil between the tunnels on both sides, measure the temperature of the frozen soil between the tunnels on both sides using the temperature measuring hole, calculate the average temperature of the frozen wall, and when the average temperature reaches the preset value, determine that the connection channel is satisfied The excavation conditions;
- Step S5 Excavate the connecting channel. During the excavation, the frozen soil between the two tunnels is maintained and frozen, and the frozen data is monitored and maintained.
- step S1 specifically includes:
- the freezing pipe is used as a drill rod, and the freezing pipe is connected by a thread and welded to ensure its concentricity and welding strength. After the freezing pipe reaches the design depth, the bottom of the hole is sealed with a wire plug, and the wire plug is installed in the freezing pipe by an extension rod.
- step S3 includes:
- the cooling water system includes a cooling tower, a clean water tank, and a clean water pump.
- the cooling tower, clean water tank, clean water pump and the chiller are connected to form a circulating pipeline.
- the inlet and outlet of the chiller and the clean water pump, and the inlet and outlet of the cooling tower Install control valves at the water outlets, and install a pressure gauge and thermometer at the water outlet of the clean water pump;
- the brine system includes a brine tank, a brine pump and a brine pipe.
- the brine tank, brine pump, the chiller and the freezing pipe and the liquid supply pipe are connected by the brine pipe to form a brine circulation pipeline, and the brine inlet and outlet of the chiller and the brine pump Install control valves separately, install a pressure gauge and a thermometer at the outlet of the brine pump, and install a thermometer at the outlet of the brine of each refrigerator.
- the brine is a calcium chloride solution.
- step S2 includes:
- the pipe spacing is d, among which 300mm ⁇ d ⁇ 500mm;
- the refrigeration pipe adopts ⁇ 45 ⁇ 3mm seamless steel pipe
- the refrigerated pipes are laid closely to the tunnel segments.
- step S4 includes:
- the formation of the frozen wall is analyzed, including the intersection of the frozen wall, the average temperature and the expansion thickness.
- step S4 further includes:
- Active freezing time is not less than 45 days.
- the salt water temperature is not higher than -28°C.
- the temperature difference between the first and the end of the brine circulation pipeline is not higher than 2°C;
- step S5 includes:
- the brine temperature should not be higher than -25°C, and the brine flow rate of a single freezing hole should not be less than 5m 3 /h and maintain a uniform flow;
- the present invention also provides a freezing system for the freezing construction of the communication passage.
- the freezing system for the freezing construction of the communication passage includes a refrigerator, a cooling water system, a brine system, a freezing discharge pipe and a liquid supply pipe;
- the refrigerator, cooling water system and brine system are arranged in the tunnel on one side of the connecting channel, and on the other side of the tunnel, multiple rows of refrigerated pipes are laid along the frozen wall of the periphery of the channel, and multiple pairs of perforations are opened between the tunnels on both sides. It is used for cooling the freezing holes and freezing pipes of the opposite tunnel, and the liquid supply pipes are arranged in the freezing pipes around the connecting channel;
- the cooling water system includes a cooling tower, a clean water tank, and a clean water pump.
- the cooling tower, clean water tank, clean water pump and the chiller are connected to form a circulating pipeline.
- the inlet and outlet of the chiller and the clean water pump, and the inlet and outlet of the cooling tower Install control valves at the water outlets, and install a pressure gauge and thermometer at the water outlet of the clean water pump;
- the brine system includes a brine tank, a brine pump and a brine pipe.
- the brine tank, brine pump, the chiller and the freezing pipe and the liquid supply pipe are connected by the brine pipe to form a brine circulation pipeline, and the brine inlet and outlet of the chiller and the brine pump Install control valves separately, install pressure gauges and thermometers at the outlet of the brine pump, and install thermometers at the brine outlet of each chiller;
- the brine is a calcium chloride solution.
- the multiple perforations are parallel to each other, and the multiple brine pipes pass through the multiple perforations respectively.
- One end is connected to the refrigerator, and the other end is connected to the refrigerating drain pipe and the liquid supply pipe.
- the freezing system used for the freezing construction of the connecting passage further includes a temperature measuring pipe and a pressure relief pipe, a freezing pipe, a temperature measuring pipe and a pressure relief pipe.
- the pipes are installed in the freezing hole, the temperature measuring hole and the pressure relief hole respectively.
- the freezing hole, the temperature measuring hole and the pressure relief hole are respectively arranged around the connecting channel.
- the freezing pipe, the temperature measuring pipe and the pressure relief pipe are respectively used as the freezing hole and the temperature measuring hole. Drill bits for drilling holes and pressure relief holes.
- the present invention provides a method for freezing construction of a connecting passage, which has the following advantages:
- the present invention provides a freezing construction method for connecting passages.
- a secondary opening process is adopted to prevent a large amount of mud and water from being drilled through the tunnel segments, and the deviation of the borehole is repeatedly calibrated during construction. Angle, correct or block in time to ensure the smooth connection of the freezing pipe to improve the accuracy of the deflection of the freezing hole;
- the present invention provides a freezing construction method for connecting passages. During the freezing process, the salt water temperature changes of each group of freezers are detected and analyzed, and the temperature of the freezers, circuits and temperature measuring holes are monitored every day, and the tunnel segments and If the temperature changes near the interface of the soil layer, if problems are found, the freezing system will be improved in time, and the freezing operation parameters will be adjusted.
- the present invention also provides a freezing system for freezing construction of the connecting passage, the beneficial effect of which is similar to the freezing construction method of the connecting passage, and will not be repeated.
- Fig. 1 is a schematic flow chart of a method for freezing a connecting passage provided by an embodiment of the present invention
- Fig. 2 is a schematic structural diagram of a freezing system for freezing construction of a connecting passage provided by an embodiment of the present invention.
- the present invention provides a method for freezing construction of a connecting passage.
- the freezing construction method of the connecting passage includes the following steps:
- Step S1 Arrange multiple freezing holes, multiple temperature measurement holes and multiple pressure relief holes on both sides of the connecting channel, and use the freezing pipe, temperature measurement pipe and pressure relief pipe as the corresponding freezing holes and measurement Warm hole and pressure relief hole;
- Step S2 Set up the freezing station in the tunnel on one side of the connecting passage, and lay multiple rows of freezing pipes along the frozen wall of the tunnel on the opposite side of the freezing station, and set up multiple pairs of perforations between the tunnels on both sides. Freezing holes and freezing pipes in the opposite tunnel provide cooling;
- Step S3 Set up a freezing system at the freezing station, debug and run the freezing system
- Step S4 Actively freeze the soil between the tunnels on both sides, measure the temperature of the frozen soil between the tunnels on both sides using the temperature measuring hole, calculate the average temperature of the frozen wall, and when the average temperature reaches the preset value, determine that the connection channel is satisfied The excavation conditions;
- Step S5 Excavate the connecting channel. During the excavation, the frozen soil between the two tunnels is maintained and frozen, and the frozen data is monitored and maintained.
- step S1 specifically includes:
- Step S101 Use a freezing pipe as a drill rod.
- the freezing pipe is connected by a thread and welded to ensure its concentricity and welding strength. After the freezing pipe reaches the designed depth, plug the bottom of the sealed hole with a wire, which is to use an extension rod to plug the wire Installed at the bottom of the freezing pipe.
- Step S102 Set up and fix the drill in the construction position of the freezing hole, put the drill bit into the orifice device, and seal it with packing. If the drill rod is twisted, reposition the freezing hole and take measures to remedy the hole. At the same time, the waste holes are filled and grouted.
- Step S103 When drilling the freezing hole, repeatedly check the direction of the freezing pipe at each certain drilling depth, adjust the position of the drilling rig, and continue drilling after detecting that the drilling direction is not deviated.
- Step S104 After the freezing pipe is installed in place, the liquid supply pipe is lowered into the freezing pipe.
- Step S105 using the same construction method as the freezing pipe to construct the temperature measuring hole and the pressure relief hole.
- step S101, step S102, step S103, step S104, and step S105 can be adjusted to a certain extent without affecting the construction process.
- freezing holes there are 101 freezing holes in the connecting channel, of which 61 freezing holes are arranged in the tunnel on the side of the freezing station, and 40 freezing holes are arranged on the opposite side of the freezing station.
- the specific requirements are as follows:
- the location of the freezing holes should not exceed 100mm.
- the location of the joints, bolt holes, main ribs and ribs of steel pipes should be avoided.
- the maximum allowable deflection of the freezing hole is 150mm (the distance between the freezing hole formation track and the designed track).
- the passage area of the final hole of the freezing hole is not more than 1300mm, and the area of the waste water pump room is not more than 1400mm.
- the effective depth of the freezing hole (the length of the circulating salt water section of the freezing pipe below the surface of the segment) is not less than the design depth of the freezing hole.
- the freezing pipe adopts 20# (Q235) steel, and the specification is low-carbon seamless steel pipe of ⁇ 89 ⁇ 8mm.
- the pressure resistance of the freezing pipe is not less than 1.5 to 2.0 times of the salt water pressure of the freezing working surface, and not less than 0.8Mpa.
- the compressive strength of the freezing pipe joint is not less than 80% of the parent pipe.
- the amount of soil loss during the construction of the freezing hole shall not be greater than the volume of the freezing hole, otherwise grouting should be carried out in time to control ground settlement.
- Drill through holes to review the positions of the reserved openings of the two tunnels. If the relative position error of the reserved openings of the two tunnels is greater than 100mm, the arrangement of the freezing holes should be adjusted according to the principle of ensuring the design thickness of the freezing wall.
- the freezing pipe is made of ⁇ 89 ⁇ 8mm low carbon seamless steel pipe.
- the length of a single pipe is 1.0 ⁇ 2.0m, and it is better to be longer if the construction site permits.
- the freezing pipe is connected by butt welding of the lined pipe, and a 45° bevel is processed on one side.
- the head of the first section freezing pipe is welded and sealed with 10mm thick steel plate. Use J422 welding rod.
- the temperature measuring tube material is ⁇ 45 ⁇ 3mm/ ⁇ 89 ⁇ 8mm low carbon seamless steel pipe.
- the pressure relief pipe adopts ⁇ 89 ⁇ 8mm seamless steel pipe, which is directly connected by butt welding, and the head of the first section of pipe is welded and sealed with a 5mm steel plate.
- the liquid supply pipe adopts ⁇ 45 ⁇ 3.5mm polyethylene plastic pipe.
- the opening section is the key.
- the freezing pipe Before the freezing pipe is lowered into the hole, it must be piping to ensure the concentricity of the freezing pipe.
- the theodolite light inclinometer method is used to detect, and then the depth of the freezing hole is measured again, and the pressure leak test is performed.
- the pressure resistance of the freezing pipe shall not be lower than 1.0MPa, and shall not be lower than 1.5 times of the salt water pressure of the freezing working surface, the pressure shall not change after 30 minutes of stability or the pressure drop shall be less than 0.05MPa in the first 30 minutes, and the pressure shall not be lowered in the next 15 minutes as qualified.
- step S3 includes:
- the refrigeration station is equipped with a refrigerator, a cooling water system and a brine system;
- the cooling water system includes a cooling tower, a clean water tank and a clean water pump.
- the cooling tower, the clean water tank, the clean water pump and the refrigerator are connected by pipelines to form a circulating pipeline.
- the brine system includes a brine tank, a brine pump and a brine pipe, a brine tank, and a brine pump ,
- the chiller and the chilled discharge pipe and the liquid supply pipe are connected by the brine pipe to form a brine circulation pipeline.
- the brine inlet and outlet of the chiller and the brine pump are respectively equipped with control valves, and the pressure gauge and thermometer are installed at the outlet of the brine pump. , Install a thermometer at the brine outlet of each refrigerator, and the brine is a calcium chloride solution.
- the brine tank is lined with 100 ⁇ 100 ⁇ 150mm square wood, and the spacing is not more than 800mm.
- a 100mm thick polystyrene insulation board is filled between the square timbers.
- the refrigerator should be installed horizontally, the chassis should be seated firmly and leveled with iron wedge.
- the cooling tower is installed above the clean water tank.
- the installation of the cooling tower should focus on checking whether the insulation of the water distributor motor cable joint is well, whether the motor rotation direction is correct, and whether the water distributor is evenly distributed.
- step S2 includes:
- the pipe spacing is d, among which 300mm ⁇ d ⁇ 500mm; the refrigerated pipe adopts ⁇ 45 ⁇ 3mm seamless steel pipes; the refrigerated pipes are closely attached to the tunnel segments Laying.
- step S4 includes:
- Step S401 When performing active freezing, adjust the operating parameters of the refrigerator according to the cooling water temperature and the brine temperature to improve the cooling efficiency of the refrigerator;
- Step S402 After the frozen soil is opened, check the frosting of the freezer. If the freezer is found to be unevenly frosted or thawed, adjust the control valve or vent measures to make the salt water flow of the freezer uniform;
- Step S403 According to the monitoring results of the temperature of the temperature measuring hole and the pressure of the pressure relief hole, the formation condition of the freezing wall is analyzed, including the intersection of the freezing wall, the average temperature and the expansion thickness.
- Step S401, step S402, and step S403 are continuously performed multiple times, and there is no specific sequence. During the active freeze start and maintenance period, the following points are met:
- the design active freezing time is 45 days (the freezing excavation time is determined according to the freezing wall crossing time, the freezing wall thickness and the average temperature and other parameters). It is required that the single-hole flow rate of the freezing hole is not less than 5m 3 /h; the salt water temperature of active freezing for 7 days is reduced to below -18°C; the salt water temperature of active freezing for 15 days is reduced to below -24°C, and the temperature difference of the loop brine is not more than 2°C; The salt water temperature dropped to -30°C during excavation. If the brine temperature and brine flow rate do not meet the design requirements, the active freezing time should be extended.
- the operating parameters of the refrigerator should be adjusted according to the cooling water temperature and brine temperature to improve the cooling efficiency of the refrigerator.
- step S4 further includes: when it is satisfied: the active freezing time is not less than 45 days; and the salt water temperature is not higher than -28°C; When the temperature difference at the end is not higher than 2°C; and the average temperature of the freezing wall is not higher than -10°C, and the surface temperature of the freezing wall is not higher than -5°C, it is judged that the excavation conditions of the connecting channel are met.
- the following conditions should be met during the excavation of specific contact passages:
- the positive freezing time reaches the design value, the brine temperature drops below -28°C, and the temperature difference between the return and loop brine is not more than 2°C.
- the design thickness of the frozen wall is 3m between the arch of the connecting passage and the side wall, 2.2m for the side wall of the pump room, and 2m for the bottom plate; the average temperature of the frozen wall is not higher than -10°C, and the interface temperature is not higher than -5°C.
- the average development speed of the freezing wall is calculated, and the maximum hole spacing in the effective area of the freezing wall is obtained according to the actual deflection of the freezing hole, and the freezing is calculated.
- the time of the wall crossing circle draw the frozen wall circle diagram, and measure the frozen wall thickness.
- the location of the exploration hole is selected at a place where the hole spacing is large or there is abnormal freezing, and the formation in the exploration hole is stable and there is no continuous mud and water outflow.
- step S5 includes: during the freezing period, the salt water temperature is not higher than -25°C, the salt water flow rate of a single freezing hole is not less than 5m 3 /h and maintains a uniform flow; monitoring exposure For the surface temperature and displacement of the frozen wall, if it is found that the temperature of the local frozen wall is increased or deformed, increase the flow of the frozen hole at the corresponding position of the frozen wall where the temperature is increased or deformed.
- the following conditions should be met during the maintenance freeze period during the excavation of specific contact passages:
- the brine temperature should be kept below -25°C. During excavation, it is not allowed to increase the salt water temperature or reduce the salt water flow rate.
- the freezing construction monitoring must be carried out in the same way as the active freezing, to ensure the normal operation of the freezing system, and to analyze the temperature change of the freezing wall in time.
- the insulation layer near the opening of the bypass channel shall not be damaged.
- the surface temperature of the exposed freezing wall rises to 0°C
- the surface is thermally insulated, and the thermal insulation material uses a 30mm thick soft thermal insulation board.
- Freezing can be stopped after pouring the concrete lining.
- the freezing hole is blocked immediately after freezing is stopped. Cut off the orifice pipe and freezing pipe first, and the depth required to enter the pipe segment is not less than 60mm, then use compressed air to blow dry the salt water in the pipe, and fill the freezing pipe with M10 cement mortar or concrete with a length of not less than 1.5m.
- the grouting pipe is embedded in the freezing hole position for grouting to stop leakage when water seepage.
- the present invention also provides a freezing system for the freezing construction of the communication channel.
- the freezing system for the freezing construction of the communication channel includes a refrigerator, a cooling water system, a brine system, a freezing drain pipe and a liquid supply pipe;
- the chiller, cooling water system and brine system are arranged in the tunnel on one side of the connecting channel, and on the other side of the tunnel, multiple rows of refrigerated pipes are laid along the frozen wall of the channel. A number of pairs of perforations are opened between the tunnels on both sides. Cooling is provided to the freezing hole and freezing discharge pipe of the opposite tunnel.
- the liquid supply pipe is set in the freezing pipe around the connecting channel;
- the cooling water system includes cooling tower, clear water tank and clear water pump, cooling tower, clear water tank, clear water pump and refrigeration
- the machines are connected by pipelines to form a circulation pipeline.
- the water inlet and outlet of the refrigerator and the clean water pump, and the water inlet of the cooling tower are respectively installed with control valves, and the pressure gauge and thermometer are installed at the outlet of the clean water pump;
- the brine system includes a brine tank , Brine pumps and brine pipes, brine tanks, brine pumps, chillers and refrigeration discharge pipes, and liquid supply pipes are connected to form brine circulation pipelines through brine pipes.
- the brine inlet and outlet of the chillers and brine pumps are installed with control valves. Install a pressure gauge and thermometer at the outlet of the brine pump, and install a thermometer at the brine outlet of each chiller.
- the brine is a calcium chloride solution.
- the multiple perforations are parallel to each other, and the multiple brine pipes pass through the multiple perforations respectively.
- One end is connected to the refrigerator, and the other end is connected to the refrigerating drain pipe and the liquid supply pipe.
- the freezing system used for the freezing construction of the connecting passage further includes a temperature measuring pipe and a pressure relief pipe, a freezing pipe, a temperature measuring pipe and a pressure relief pipe.
- the pipes are installed in the freezing hole, the temperature measuring hole and the pressure relief hole respectively.
- the freezing hole, the temperature measuring hole and the pressure relief hole are respectively arranged around the connecting channel.
- the freezing pipe, the temperature measuring pipe and the pressure relief pipe are respectively used as the freezing hole and the temperature measuring hole. Drill bits for drilling holes and pressure relief holes.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
Claims (10)
- 一种联络通道的冻结施工方法,其特征在于,所述联络通道的冻结施工方法包括以下步骤:步骤S1:在联络通道两侧分别布设多个冻结孔、多个测温孔和多个泄压孔,分别将冻结管、测温管、泄压管作为钻杆施工所对应的冻结孔、测温孔和泄压孔;所述步骤S1具体包括:利用冻结管作钻杆,冻结管采用丝扣连接,并进行焊接,确保其同心度和焊接强度,冻结管达到设计深度后用丝堵密封孔底部,是利用接长杆将丝堵安装在冻结管的底部;将钻机设置并固定在冻结孔施工方位,将钻头装入孔口装置内,并用盘根密封,若出现钻杆扭断,便重新定位该冻结孔,采取打补孔措施进行补救,同时对废孔进行充填注浆处理;在冻结孔钻进时,每个一定钻进深度反复校核冻结管方向,调整钻机位置,检测钻进方向无偏斜后继续进行钻进;冻结管安装到位后,在冻结管内下入供液管;采用与冻结管相同的施工方法施工测温孔和泄压孔;步骤S2:将冻结站设置在联络通道一侧的隧道中,冷冻站对侧隧道沿通道外围冻结壁敷设多排冷冻排管,在两侧隧道之间开设多个对穿孔,对穿孔用于给对侧隧道冻结孔和冷冻排管供冷;步骤S3:在冷冻站设置冻结系统,调试并运行冻结系统;步骤S4:对两侧隧道之间的土壤进行积极冻结,利用测温孔测得两侧隧道之间冻土温度,计算冻结壁的平均温度,当平均温度达到预设值时,判定满足联络通道的开挖条件;步骤S5:开挖联络通道,在开挖期间,对两侧隧道之间的冻土进行维护冻结,并监测维护冻结数据。
- 如权利要求1所述的联络通道的冻结施工方法,其特征在于,所述步骤S3包括:在冷冻站配置冷冻机、冷却水系统和盐水系统;所述冷却水系统包括有冷却塔、清水箱和清水泵,所述冷却塔、清水箱、清水泵和冷冻机之间通过管路连接形成循环管路,所述冷冻机和清水泵的进出水口、在冷却塔的进水口分别安装控制阀门,在所述清水泵的出水口安装压力表和温度计;所述盐水系统包括有盐水箱、盐水泵和盐水管,所述盐水箱、盐水泵、冷冻机和冷冻排管及供液管之间通过盐水管连接形成盐水循环管路,所述冷冻机和盐水泵的盐水进出水口分别安装控制阀门,在所述盐水泵的出水口安装压力表和温度计,在每台冷冻机的的盐水出水口安装温度计,所述盐水为氯化钙溶液。
- 如权利要求2所述的联络通道的冻结施工方法,其特征在于,所述步骤S2包括:冻结站对侧隧道沿联络通道外围冻结壁敷设6排冷冻排管,排管间距为d,其中300mm<d<500mm;所述冷冻排管采用φ45×3mm无缝钢管;所述冷冻排管密贴隧道管片敷设。
- 如权利要求2所述的联络通道的冻结施工方法,其特征在于,所述步骤S4包括:进行积极冻结时,根据冷却水温度和盐水温度,调节冷冻机的运行参数,用于提高冷冻机的制冷效率;冻土开冻后巡回检查冻结器结霜,若发现冷冻机结霜不均匀或融化现象,采取调节控制阀门或放空措施使冻结器盐水流量均匀;根据测温孔温度和泄压孔压力监测结果,分析冻结壁的形成状况,包括冻结壁的交圈情况、平均温度和扩展厚度。
- 如权利要求4所述的联络通道的冻结施工方法,其特征在于,所述步骤S4还包括:当满足:积极冻结时间不低于45天;且盐水温度不高于-28℃;且盐水循环管路的首、末端温差不高于2℃;且冻结壁的平均温度不高于-10℃,冻结壁表面温度不高于-5℃时,判定满足联络通道的开挖条件。
- 如权利要求5所述的联络通道的冻结施工方法,其特征在于,所述步骤S5包括:维护冻结期间,盐水温度不高于-25℃,单个冻结孔盐水流量不小于5m 3/h并保持均匀流动;监测暴露冻结壁的表面温度和位移量,若发现局部冻结壁温度升高、发生变形,加大温度升高或发生变形的冻结壁对应位置的冻结孔流量。
- 一种用于联络通道冻结施工的冻结系统,其特征在于,所述用于联络通道冻结施工的冻结系统包括冷冻机、冷却水系统、盐水系统、冷冻排管和供液管;所述冷冻机、冷却水系统和盐水系统设置在联络通道一侧的隧道,另一侧隧道沿通道外围冻结壁敷设多排冷冻排管,在两侧隧道之间开设多个对穿孔,所述对穿孔用于给对侧隧道冻结孔和冷冻排管供冷,所述供液管设置在联络通道周围的冻结管中;所述冷却水系统包括有冷却塔、清水箱和清水泵,所述冷却塔、清水箱、清水泵和冷冻机之间通过管路连接形成循环管路,所述冷冻机和清水泵的进出水口、在冷却塔的进水口分别安装控制阀门,在所述清水泵的出水口安装压力表和温度计;所述盐水系统包括有盐水箱、盐水泵和盐水管,所述盐水箱、盐水泵、冷冻机和冷冻排管及供液管之间通过盐水管连接形成盐水循环管路,所述冷冻机和盐水泵的盐水进出水口分别安装控制阀门,在所述盐水泵的出水口安装压力表和温度计,在每台冷冻机的的盐水出水口安装温度计。
- 如权利要求7所述的用于联络通道冻结施工的冻结系统,其特征在于,所述盐水为氯化钙溶液。
- 如权利要求7所述的用于联络通道冻结施工的冻结系统,其特征在于,所述对穿孔有多个,多个所对穿孔相互平行,多个所述盐水管从分别从多个所述对穿孔中穿过,所述盐水管的一端连接至冷冻机,另一端连接至冷冻排管和供液管。
- 如权利要求7所述的用于联络通道冻结施工的冻结系统,其特征在于,所述用于联络通道冻结施工的冻结系统还包括测温管和泄压管,所述冻结管、所述测温管和所述泄压管分别安装在冻结孔、测温孔和泄压孔中,所述冻结孔、测温孔和泄压孔分别设置在联络通道周围,所述冻结管、测温管和泄压管分别作为冻结孔、测温孔和泄压孔钻孔时的钻头。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021506939A JP7141650B2 (ja) | 2019-09-28 | 2020-06-29 | 連絡通路の凍結工法及び凍結システム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910929010.6A CN110685697A (zh) | 2019-09-28 | 2019-09-28 | 联络通道的冻结施工方法及冻结系统 |
CN201910929010.6 | 2019-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020244677A1 true WO2020244677A1 (zh) | 2020-12-10 |
Family
ID=69110851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2020/099045 WO2020244677A1 (zh) | 2019-09-28 | 2020-06-29 | 联络通道的冻结施工方法及冻结系统 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP7141650B2 (zh) |
CN (1) | CN110685697A (zh) |
LU (1) | LU102303B1 (zh) |
WO (1) | WO2020244677A1 (zh) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113153312A (zh) * | 2021-03-30 | 2021-07-23 | 广东华隧建设集团股份有限公司 | 一种用于冻结地铁联络通道软硬地层的施工和监测方法 |
CN113266373A (zh) * | 2021-06-24 | 2021-08-17 | 北京中煤矿山工程有限公司 | 一种大断面隧道施工中冻结壁与水泥加固体联合围护体系及其开挖方法 |
CN113515880A (zh) * | 2021-03-11 | 2021-10-19 | 中国市政工程中南设计研究总院有限公司 | 一种基于深度学习临海大盾构隧道冻结法冻胀融沉变形机理研究方法及装置 |
CN113669072A (zh) * | 2021-09-06 | 2021-11-19 | 广东华隧建设集团股份有限公司 | 软硬界面冻结管断裂致低温未冻缺陷的诊断和修复方法 |
CN113833488A (zh) * | 2021-07-30 | 2021-12-24 | 浙江理工大学 | 地铁隧道联络通道施工方法 |
CN113898412A (zh) * | 2021-10-13 | 2022-01-07 | 中铁十九局集团有限公司 | 一种基于地铁水平冻结的冻胀力监测方法 |
CN115045256A (zh) * | 2022-06-21 | 2022-09-13 | 核工业井巷建设集团有限公司 | 钻爆式隧道施工法土体沉降监测加固装置及加固方法 |
CN115457728A (zh) * | 2022-08-18 | 2022-12-09 | 合肥未来计算机技术开发有限公司 | 一种隧道施工人员作业安全防护方法 |
CN115977650A (zh) * | 2022-11-22 | 2023-04-18 | 安徽理工大学 | 一种基于平面斜交联络通道的连通冻结体系及其施工方法 |
CN117073304A (zh) * | 2023-07-05 | 2023-11-17 | 广东华隧高科建设有限公司 | 一种盐水正逆循环装置及冷冻机 |
CN117702791A (zh) * | 2023-12-19 | 2024-03-15 | 广州地铁设计研究院股份有限公司 | 一种过江隧道基坑接口的堵水体系及施工方法 |
CN117779742A (zh) * | 2024-02-23 | 2024-03-29 | 中国建筑第六工程局有限公司 | 富水地区冻结-降水结合的分区定向注浆系统及注浆方法 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110685697A (zh) * | 2019-09-28 | 2020-01-14 | 中铁九局集团第四工程有限公司 | 联络通道的冻结施工方法及冻结系统 |
CN111504374B (zh) * | 2020-04-26 | 2021-10-08 | 中国建筑第二工程局有限公司 | 一种用于地铁联络通道冻结壁交圈的预警装置和预警方法 |
CN111945704A (zh) * | 2020-08-13 | 2020-11-17 | 中铁二十局集团第一工程有限公司 | 倾斜布置多排冻结管对富水粉砂地层加固的方法 |
CN112696201A (zh) * | 2020-12-28 | 2021-04-23 | 上海市基础工程集团有限公司 | 盾构法隧道联络通道钢管片开孔及封孔施工方法 |
CN113073981B (zh) * | 2021-03-18 | 2022-10-21 | 上海工程技术大学 | 一种可避免热力管线影响的冻结组合管及施工方法 |
CN113468630B (zh) * | 2021-05-13 | 2023-08-25 | 海南大学 | 一种盾构隧道始发端头加固方案优化方法 |
CN113235563B (zh) * | 2021-05-18 | 2022-05-27 | 北京中煤矿山工程有限公司 | 市政联络通道排水管管口压盖修复液氮冻结装置及压盖修复方法 |
CN113790755B (zh) * | 2021-09-06 | 2024-03-22 | 广东华隧建设集团股份有限公司 | 软硬界面冻结管断裂致低温未冻缺陷诊断和修复的装置 |
CN115262603B (zh) * | 2022-05-24 | 2023-04-07 | 北京城建道桥建设集团有限公司 | 一种对地表无影响的城市内地下施工冷冻隔水方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1548228B1 (de) * | 2003-12-23 | 2007-01-31 | Hochtief Aktiengesellschaft | Verfahren zur Erstellung einer unterirdischen Röhre und Vorrichtung zur Durchführung des Verfahrens |
CN106089214A (zh) * | 2016-06-21 | 2016-11-09 | 中铁十局集团第三建设有限公司 | 联络通道人工冻结加固施工方法 |
JP6487713B2 (ja) * | 2015-02-24 | 2019-03-20 | 大成建設株式会社 | 接合方法 |
CN109657422A (zh) * | 2019-02-26 | 2019-04-19 | 中铁十二局集团有限公司 | 隧道内的冻结壁的施工设计方法及施工设计装置 |
CN110132347A (zh) * | 2019-04-25 | 2019-08-16 | 中铁十二局集团有限公司 | 基于冻结施工的隧道的施工监控方法 |
CN110685697A (zh) * | 2019-09-28 | 2020-01-14 | 中铁九局集团第四工程有限公司 | 联络通道的冻结施工方法及冻结系统 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008019650A (ja) * | 2006-07-13 | 2008-01-31 | Kajima Corp | 地盤の凍結方法 |
FR2934007B1 (fr) * | 2008-07-17 | 2010-09-10 | Ecole Polytech | Procede de construction d'une galerie souterraine ou d'un puits permettant de realiser un bouchon etanche pour un stockage de dechets dangereux et notamment radioactifs. |
JP5597113B2 (ja) * | 2010-11-30 | 2014-10-01 | 株式会社熊谷組 | 地中に地下空間を形成する方法 |
JP6906411B2 (ja) * | 2017-09-22 | 2021-07-21 | 鹿島建設株式会社 | トンネル |
-
2019
- 2019-09-28 CN CN201910929010.6A patent/CN110685697A/zh active Pending
-
2020
- 2020-06-29 JP JP2021506939A patent/JP7141650B2/ja active Active
- 2020-06-29 WO PCT/CN2020/099045 patent/WO2020244677A1/zh active Application Filing
- 2020-06-29 LU LU102303A patent/LU102303B1/en active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1548228B1 (de) * | 2003-12-23 | 2007-01-31 | Hochtief Aktiengesellschaft | Verfahren zur Erstellung einer unterirdischen Röhre und Vorrichtung zur Durchführung des Verfahrens |
JP6487713B2 (ja) * | 2015-02-24 | 2019-03-20 | 大成建設株式会社 | 接合方法 |
CN106089214A (zh) * | 2016-06-21 | 2016-11-09 | 中铁十局集团第三建设有限公司 | 联络通道人工冻结加固施工方法 |
CN109657422A (zh) * | 2019-02-26 | 2019-04-19 | 中铁十二局集团有限公司 | 隧道内的冻结壁的施工设计方法及施工设计装置 |
CN110132347A (zh) * | 2019-04-25 | 2019-08-16 | 中铁十二局集团有限公司 | 基于冻结施工的隧道的施工监控方法 |
CN110685697A (zh) * | 2019-09-28 | 2020-01-14 | 中铁九局集团第四工程有限公司 | 联络通道的冻结施工方法及冻结系统 |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113515880A (zh) * | 2021-03-11 | 2021-10-19 | 中国市政工程中南设计研究总院有限公司 | 一种基于深度学习临海大盾构隧道冻结法冻胀融沉变形机理研究方法及装置 |
CN113153312B (zh) * | 2021-03-30 | 2022-04-08 | 广东华隧建设集团股份有限公司 | 一种用于冻结地铁联络通道软硬地层的施工和监测方法 |
CN113153312A (zh) * | 2021-03-30 | 2021-07-23 | 广东华隧建设集团股份有限公司 | 一种用于冻结地铁联络通道软硬地层的施工和监测方法 |
CN113266373A (zh) * | 2021-06-24 | 2021-08-17 | 北京中煤矿山工程有限公司 | 一种大断面隧道施工中冻结壁与水泥加固体联合围护体系及其开挖方法 |
CN113266373B (zh) * | 2021-06-24 | 2024-03-26 | 北京中煤矿山工程有限公司 | 一种大断面隧道施工中冻结壁与水泥加固体联合围护结构及其开挖方法 |
CN113833488B (zh) * | 2021-07-30 | 2023-12-08 | 浙江理工大学 | 地铁隧道联络通道施工方法 |
CN113833488A (zh) * | 2021-07-30 | 2021-12-24 | 浙江理工大学 | 地铁隧道联络通道施工方法 |
CN113669072B (zh) * | 2021-09-06 | 2024-02-06 | 广东华隧建设集团股份有限公司 | 软硬界面冻结管断裂致低温未冻缺陷的诊断和修复方法 |
CN113669072A (zh) * | 2021-09-06 | 2021-11-19 | 广东华隧建设集团股份有限公司 | 软硬界面冻结管断裂致低温未冻缺陷的诊断和修复方法 |
CN113898412A (zh) * | 2021-10-13 | 2022-01-07 | 中铁十九局集团有限公司 | 一种基于地铁水平冻结的冻胀力监测方法 |
CN113898412B (zh) * | 2021-10-13 | 2023-11-10 | 中铁十九局集团有限公司 | 一种基于地铁水平冻结的冻胀力监测方法 |
CN115045256A (zh) * | 2022-06-21 | 2022-09-13 | 核工业井巷建设集团有限公司 | 钻爆式隧道施工法土体沉降监测加固装置及加固方法 |
CN115457728A (zh) * | 2022-08-18 | 2022-12-09 | 合肥未来计算机技术开发有限公司 | 一种隧道施工人员作业安全防护方法 |
CN115457728B (zh) * | 2022-08-18 | 2023-12-26 | 合肥未来计算机技术开发有限公司 | 一种隧道施工人员作业安全防护方法 |
CN115977650A (zh) * | 2022-11-22 | 2023-04-18 | 安徽理工大学 | 一种基于平面斜交联络通道的连通冻结体系及其施工方法 |
CN117073304A (zh) * | 2023-07-05 | 2023-11-17 | 广东华隧高科建设有限公司 | 一种盐水正逆循环装置及冷冻机 |
CN117702791A (zh) * | 2023-12-19 | 2024-03-15 | 广州地铁设计研究院股份有限公司 | 一种过江隧道基坑接口的堵水体系及施工方法 |
CN117779742A (zh) * | 2024-02-23 | 2024-03-29 | 中国建筑第六工程局有限公司 | 富水地区冻结-降水结合的分区定向注浆系统及注浆方法 |
CN117779742B (zh) * | 2024-02-23 | 2024-05-17 | 中国建筑第六工程局有限公司 | 富水地区冻结-降水结合的分区定向注浆系统及注浆方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2021534337A (ja) | 2021-12-09 |
CN110685697A (zh) | 2020-01-14 |
JP7141650B2 (ja) | 2022-09-26 |
LU102303B1 (en) | 2021-05-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020244677A1 (zh) | 联络通道的冻结施工方法及冻结系统 | |
CN104790961B (zh) | 一种盾构隧道端头垂直杯型冻结加固结构及方法 | |
CN105908765B (zh) | 用于保护地下水环境的明挖隧道止水结构及施工方法 | |
CN105909260B (zh) | 用于保护地下水环境的地铁车站止水结构及其施工方法 | |
CN104074525B (zh) | 全断面注浆、矩形水平冻结与管棚联合加固结构及方法 | |
CN101463724A (zh) | 双排孔水平冻结法连接通道的施工方法 | |
CN106121686B (zh) | 用于保护地下水环境的暗挖隧道止水结构及其施工方法 | |
CN110080202B (zh) | 一种基坑坑底水平冻结加固结构及施工方法 | |
CN204609889U (zh) | 一种盾构隧道端头垂直杯型冻结加固结构 | |
CN104963334A (zh) | 用注浆冻结管加固冻结联络通道抑制冻胀融沉的施工方法 | |
CN1614152A (zh) | 软土层水平冻结法连接通道的施工方法 | |
CN101418567A (zh) | 一种对隧道管片进行保护性切割的施工方法 | |
CN104806253A (zh) | 一种矩形顶管通道之间开洞的施工方法 | |
CN109209396A (zh) | 一种盾构隧道端头联合加固结构及施工方法 | |
CN210714701U (zh) | 用于联络通道冻结施工的冻结系统 | |
CN114109399A (zh) | 灰岩地层冻结施工方法 | |
CN111236947A (zh) | 一种采用垂直冻结的地铁竖井施工方法 | |
CN205669398U (zh) | 用于保护地下水环境的暗挖隧道止水结构 | |
CN212272200U (zh) | 一种竖井冻结系统 | |
CN106759375B (zh) | 一种高水位软土基坑冻土钉墙支护结构体系及施工方法 | |
CN111365001B (zh) | 一种能实现分期冻结的冻结器及分期冻结方法 | |
CN111550251A (zh) | 一种富水砂层盾构隧道联络通道冻结实现结构及施工工艺 | |
CN205804382U (zh) | 用于保护地下水环境的明挖隧道止水结构 | |
CN215169989U (zh) | 冻结法加固60米级超长距离联络通道的冻结体系 | |
CN115522531A (zh) | 一种基于冻结法的电梯井或集水坑的冻结系统和施工方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20817622 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2021506939 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 29/07/2022) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 20817622 Country of ref document: EP Kind code of ref document: A1 |