CN108797603A - A kind of protection network and liquid nitrogen frozen soil wall composite supporting construction and its construction method - Google Patents
A kind of protection network and liquid nitrogen frozen soil wall composite supporting construction and its construction method Download PDFInfo
- Publication number
- CN108797603A CN108797603A CN201810607756.0A CN201810607756A CN108797603A CN 108797603 A CN108797603 A CN 108797603A CN 201810607756 A CN201810607756 A CN 201810607756A CN 108797603 A CN108797603 A CN 108797603A
- Authority
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- China
- Prior art keywords
- liquid nitrogen
- protection network
- frozen soil
- soil wall
- freezing
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Classifications
-
- 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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- 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
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/14—Restraining of underground water by damming or interrupting the passage of underground water by freezing the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
Abstract
The invention discloses a kind of protection networks and liquid nitrogen frozen soil wall composite supporting construction, it is related to pattern foundation pit supporting structure field, including protection network, anchor pole, liquid nitrogen frozen soil wall and concrete topping, the configuration of the present invention is simple, using the form of protection network and liquid nitrogen frozen soil wall composite support, steel and concrete can be saved, project cost is relatively low；Using liquid nitrogen freezing, it is not necessarily to power consumption, is reduced environmental pollution and safe operation；Protection network area occupied is small, and convenient and quick construction, noise pollution is small, is suitable for the engineering of various soil properties, highly practical.
Description
Technical field
The present invention relates to pattern foundation pit supporting structure fields, and in particular to a kind of protection network and liquid nitrogen frozen soil wall composite supporting construction and its
Construction method.
Background technology
With the construction of skyscraper, subway, city underground engineering etc., deep-foundation pit engineering emerges in multitude.Due to deep basal pit
Supporting be engineering safety and the important guarantee of economy, studying the support technology of reliable and economic has far-reaching significance.Base
Hole support form design is affected by numerous factors, and the common supporting construction in China, which has, at present excavates simple protection structure, hangs
Arm-type supporting construction, gravity shoring-structure, Internal-shoring Supporting structure, tension-anchor bracing structure, soil nailed wall retaining structure etc., work
Support form is determined according to its soil mass property, geological conditions and foundation depth and width in journey.Brace in Deep Footing Groove difficulty is big, applies
Work is long in time limit, destabilizing factor is numerous, and especially some coastal areas belong to soft foundation, mud and quicksand are often accompanied by, this
Under the conditions of carry out Large Foundation Pit excavation, crater wall supporting is more and more difficult, traditional method be difficult adapt to, this has become me
One of the engineering challenge of construction deep basal pit in state's soft foundation.How a kind of new foundation pit enclosure structure and its construction are found
Method is current technical barrier urgently to be resolved hurrily.
Chinese patent CN207295740U discloses a kind of permanent slope retaining structure of novel green, including main supporting,
Auxiliary shoring, wherein auxiliary shoring are located at the front of main supporting, and main supporting ratio of slope delays in auxiliary shoring, main supporting and auxiliary shoring
Bottom of slope be both secured on pedestal；Main supporting is connect with the anchor pole being embedded in soil layer geology, and auxiliary shoring passes through reinforcing rib and master
Supporting connects.Light-weight high-strength material is filled between main supporting and auxiliary shoring, light-weight high-strength material forms one with reinforcing rib,
Although the structure has good aesthetic of landscape effect and supporting effect is good, which uses a large amount of reinforcing bars, cost
It is high.
Chinese patent CN101487261A discloses a kind of shaped steel freezing wall foundation ditch combined enclosure method and its structure, the knot
Although structure intensity is high, it is suitable for various soil layers, construction is frozen into wall and needs the time long, therefore efficiency is low.
Invention content
The purpose of the present invention is to provide a kind of protection network and liquid nitrogen frozen soil wall composite supporting construction and its construction method, with
It solves the above-mentioned multiple defects caused by the prior art.
A kind of protection network and liquid nitrogen frozen soil wall composite supporting construction, including protection network, anchor pole, liquid nitrogen frozen soil wall, concrete
Face layer, the protection network is using active flexible protection network and is covered in the slope surface of foundation pit, and described anchor pole one end passes through fore shaft beam
Protection network is anchored, the other end tilts through ground to be freezed to fix with liquid nitrogen frozen soil wall, and the liquid nitrogen frozen soil wall is in ground
And it is internally provided with freezing hole and freezing pipe, the concrete topping is located at the top of foundation pit.
Preferably, it is mine resin that the liquid nitrogen frozen soil wall, which has multi-disc, the anchor pole material,.
Preferably, one layer of hard polyurethane foam of the protection network surface spraying.
It is existing to solve the present invention also provides the construction method of a kind of protection network and liquid nitrogen frozen soil wall composite supporting construction
Multinomial defect in technology.The construction method includes the following steps：
(1) the dangerous sundries for clearing up foundation pit slope surface and top drills in foundation pit slope surface, hangs and protects along foundation pit surrounding slope surface
Net；
(2) anchor pole is passed through in protection network merging hole, reinjects cement mortar anchoring rod, passes through fore shaft after tensioning protection network
One end of beam anchoring rod, in slope surface spraying polyurethane rigid foam；
(3) liquid nitrogen frozen soil wall is set under a subterranean formation, by the congelation of liquid nitrogen frozen soil wall with it is anchor rod anchored together, tool
Body method is as follows：
At the top of foundation pit slope surface, freezing hole is bored using vertical drilling machine, freezing hole is in quincuncial arrangement, pitch of holes 0.6m-
0.8m, every 6 freezing holes are concatenated into one group, and freezing hole installs freezing pipe, liquid nitrogen supply wherein again after being crept into mud off
Tank car setting, from frozen position closer location, connects the liquid nitrogen supply pipe including system connecting tube and liquid supply pipe on ground
Liquid nitrogen is transported in freezing pipe by road, is freezed 11 days, is additionally provided with temperature tube near freezing pipe, daily temperature detection monitoring engineering into
It spends, each route is provided with the control of low temperature liquid nitrogen valve on the liquid nitrogen feeding pipe, and the liquid nitrogen feeding pipe of all exposures is protected
Warm cystosepiment or bat heat preservation after the completion of waiting for the construction of liquid nitrogen frozen soil wall, stop perfusion liquid nitrogen, remove frozen construction relevant device；
(4) foundation pit top jet concrete topping.
Preferably, in the step (3), pass through the pressure and temperature of heat sink and total valve control liquid nitrogen on liquid nitrogen storage tank
Degree, the temperature and pressure for the cut-off valve regulation freezing pipe outlet being arranged in route is corresponded to using each freezing pipe, and liquid nitrogen storage tank goes out
The temperature control of mouth is at -150 DEG C~-170 DEG C, and pressure control is in 0.10MPa~0.15MPa, the temperature of the outlet of the freezing pipe 32
At -50 DEG C~-70 DEG C, pressure is controlled in 0.05MPa~0.1MPa for degree control.
Preferably, in the step (3), the freezing pipe selects Ф 108 × 8mm low carbon stainless steel pipes, temperature tube to select
Ф 89 × 5mm stainless-steel pipes, the liquid supply pipe and the system connecting tube select Ф 32 × 3.0mmR304 stainless steel tubes；Institute
It states in step (3), thaws to freezing pipe perfusion hot water after stopping perfusion liquid nitrogen, freezing pipe is pulled out after defrosting and is removed again later and is freezed
Equipment.
Preferably, in the step (3), the freezing pipe selects Ф 108 × 8mm low-temperature resistant plastic pipes, temperature tube to select
Ф 89 × 5mm low-temperature resistant plastic pipes, the liquid supply pipe and the system connecting tube select Ф 32 × 3.0mmR304 low-temperature resistant plastics
Pipe after construction, is not necessarily to pull out freezing pipe before removing freezing equipment.
Preferably, it is located in the step (3), at the top of the liquid nitrogen frozen soil wall at earth's surface or less 1m-1.5m, the liquid nitrogen
Soil layer, the protection network above frozen soil wall and the soil layer between liquid nitrogen frozen soil wall each act as insulating layer.
Preferably, in the step (3), when liquid nitrogen feeding pipe is filled with liquid nitrogen for the first time, to make liquid nitrogen in gaseous form into
Enter freezing system pipeline, be pre-chilled 3-4 hours, leaked to avoid each road weld seam embrittlement caused by chilling, it is found that pipeline leakage is serious
Place to stop in time nitrogen repair welding processing.
The advantage of the invention is that：It is simple in structure, using the form of protection network and liquid nitrogen frozen soil wall composite support, Neng Goujie
It saves steel and concrete, project cost is relatively low；Using liquid nitrogen freezing, it is not necessarily to power consumption, is reduced environmental pollution and safe operation；
Protection network area occupied is small, and convenient and quick construction, noise pollution is small, is suitable for the engineering of various soil properties, highly practical.
Description of the drawings
Fig. 1, Fig. 2 are the structural schematic diagram of the present invention；
The flow chart of the construction technology of construction method step 2 in Fig. 3 present invention；
Fig. 4 is the flow chart of the construction technology of construction method step 1 in the present invention；
Fig. 5 is the flow chart of the construction technology of construction method step 3 in the present invention.
Wherein, 1- protection networks, 2- anchor poles, 3- liquid nitrogen frozen soil walls, 31- freezing holes, 32- freezing pipes, 4, concrete topping, 5,
Foundation pit, 6, fore shaft beam, 7- hard polyurethane foams.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to
Specific implementation mode, the present invention is further explained.
As shown in Figures 1 to 5, a kind of protection network and liquid nitrogen frozen soil wall composite supporting construction, including protection network 1, anchor pole 2,
Liquid nitrogen frozen soil wall 3, concrete topping 4, the protection network 1 is using active flexible protection network and is covered in the slope surface of foundation pit 5, institute
It states 2 one end of anchor pole and protection network 1 is anchored by fore shaft beam 6, the other end tilts through ground to be freezed to fix with liquid nitrogen frozen soil wall 3, institute
Liquid nitrogen frozen soil wall 3 is stated in ground and is internally provided with freezing hole 31 and freezing pipe 32, the concrete topping 4 is located at foundation pit
5 tops, it is mine resin, 1 surface spraying of the protection network, one strata that the liquid nitrogen frozen soil wall 3, which has multi-disc, 2 material of the anchor pole,
Urethane rigid foam 7.
The present invention also provides the construction methods of a kind of protection network and liquid nitrogen frozen soil wall composite supporting construction.
Embodiment 1
The step of construction method, is as follows：
(1) the dangerous sundries for clearing up 5 slope surface of foundation pit and top drills in 5 slope surface of foundation pit, is hung along 5 surrounding slope surface of foundation pit anti-
Protecting wire net 1；
(2) it passes through the inclination of protection network 1 to squeeze into ground anchor pole 2, passes through 6 anchoring rod 2 of fore shaft beam after tensioning protection network 1
One end, in slope surface spraying polyurethane rigid foam 7；
(3) liquid nitrogen frozen soil wall 3 is set under ground, one is anchored at by the congelation and anchor pole 2 of liquid nitrogen frozen soil wall 3
It rises, the specific method is as follows：
At the top of 5 slope surface of foundation pit, freezing hole 31 is bored using vertical drilling machine, freezing hole 31 is in quincuncial arrangement, pitch of holes
0.6m-0.8m, every 6 freezing holes 31 are concatenated into one group, and freezing hole 31 installs freezing pipe wherein again after being crept into mud off
32, liquid nitrogen supplies tank car setting on ground from frozen position closer location, connects including system connecting tube and liquid supply pipe
Liquid nitrogen is transported in freezing pipe 32 by liquid nitrogen feeding pipe, is freezed 11 days, temperature tube is additionally provided near freezing pipe 32, daily
Temperature detection monitoring project progress, each route is provided with the control of low temperature liquid nitrogen valve, the liquid of all exposures on the liquid nitrogen feeding pipe
Nitrogen feeding pipe insulation foam plate or bat heat preservation after the completion of waiting for that liquid nitrogen frozen soil wall 3 is constructed, stop perfusion liquid nitrogen, remove jelly
Knot construction relevant device；
(4) 5 top jet concrete topping 5 of foundation pit.
In the present embodiment, in the step (3), pass through the pressure of heat sink and total valve control liquid nitrogen on liquid nitrogen storage tank
Power and temperature correspond to the temperature and pressure for 32 outlet of cut-off valve regulation freezing pipe being arranged in route using each freezing pipe 32,
At -150 DEG C~-170 DEG C, pressure is controlled in 0.10MPa~0.15MPa, the freezing pipe for the temperature control of liquid nitrogen storage tank outlet
The temperature control of 32 outlets is at -50 DEG C~-70 DEG C, and pressure controls in 0.05MPa~0.1MPa, the step (3), the jelly
Tying pipe 32 selects Ф 108 × 8mm low carbon stainless steel pipes, temperature tube to select Ф 89 × 5mm stainless-steel pipes, the liquid supply pipe and institute
It states system connecting tube and selects Ф 32 × 3.0mmR304 stainless steel tubes；In the step (3), stop being perfused after liquid nitrogen to freezing pipe
32 perfusion hot water thaw, and are pulled out after defrosting and remove freezing equipment after freezing pipe 32 again, and in the step (3), the liquid nitrogen freezes
3 top of cob wall is located at earth's surface or less 1m-1.5m, and soil layer, the protection network 1 of 3 top of the liquid nitrogen frozen soil wall freeze with liquid nitrogen
Soil layer between cob wall 3 each acts as in step described in insulating layer (3), when liquid nitrogen feeding pipe is filled with liquid nitrogen for the first time, to make liquid nitrogen
Enter freezing system pipeline in gaseous form, be pre-chilled 3-4 hours, leaked to avoid each road weld seam embrittlement caused by chilling, finds
The serious place of pipeline leakage will stop nitrogen repair welding processing in time.
Embodiment 2
The step of construction method, is as follows：
(1) the dangerous sundries for clearing up 5 slope surface of foundation pit and top drills in 5 slope surface of foundation pit, is hung along 5 surrounding slope surface of foundation pit anti-
Protecting wire net 1；
(2) it passes through the inclination of protection network 1 to squeeze into ground anchor pole 2, passes through 6 anchoring rod 2 of fore shaft beam after tensioning protection network 1
One end, in slope surface spraying polyurethane rigid foam 7；
(3) liquid nitrogen frozen soil wall 3 is set under ground, one is anchored at by the congelation and anchor pole 2 of liquid nitrogen frozen soil wall 3
It rises, the specific method is as follows：
At the top of 5 slope surface of foundation pit, freezing hole 31 is bored using vertical drilling machine, freezing hole 31 is in quincuncial arrangement, pitch of holes
0.6m-0.8m, every 6 freezing holes 31 are concatenated into one group, and freezing hole 31 installs freezing pipe wherein again after being crept into mud off
32, liquid nitrogen supplies tank car setting on ground from frozen position closer location, connects including system connecting tube and liquid supply pipe
Liquid nitrogen is transported in freezing pipe 32 by liquid nitrogen feeding pipe, is freezed 11 days, temperature tube is additionally provided near freezing pipe 32, daily
Temperature detection monitoring project progress, each route is provided with the control of low temperature liquid nitrogen valve, the liquid of all exposures on the liquid nitrogen feeding pipe
Nitrogen feeding pipe insulation foam plate or bat heat preservation after the completion of waiting for that liquid nitrogen frozen soil wall 3 is constructed, stop perfusion liquid nitrogen, remove jelly
Knot construction relevant device；
(4) 5 top jet concrete topping 5 of foundation pit.
In the present embodiment, in the step (3), pass through the pressure of heat sink and total valve control liquid nitrogen on liquid nitrogen storage tank
Power and temperature correspond to the temperature and pressure for 32 outlet of cut-off valve regulation freezing pipe being arranged in route using each freezing pipe 32,
At -150 DEG C~-170 DEG C, pressure is controlled in 0.10MPa~0.15MPa, the freezing pipe for the temperature control of liquid nitrogen storage tank outlet
At -50 DEG C~-70 DEG C, pressure is controlled in 0.05MPa~0.1MPa for the temperature control of 32 outlets；In the step (3), the jelly
Tie pipe 32 select Ф 108 × 8mm low-temperature resistant plastic pipes, temperature tube select Ф 89 × 5mm low-temperature resistant plastic pipes, the liquid supply pipe and
The system connecting tube selects Ф 32 × 3.0mmR304 low-temperature resistant plastic pipes, after construction, is not necessarily to pull out before removing freezing equipment
Except freezing pipe 32, in the step (3), 3 top of the liquid nitrogen frozen soil wall is located at earth's surface or less 1m-1.5m, and the liquid nitrogen freezes
Soil layer, the protection network 1 above cob wall 3 and the soil layer between liquid nitrogen frozen soil wall 3 each act as in step described in insulating layer (3),
When liquid nitrogen feeding pipe is filled with liquid nitrogen for the first time, liquid nitrogen to be made to enter freezing system pipeline in gaseous form, be pre-chilled 3-4 hours, with
It avoids each road weld seam embrittlement caused by chilling from leaking, it is found that the serious place of pipeline leakage will stop nitrogen repair welding processing in time.
Based on above-mentioned, the configuration of the present invention is simple, using the form of protection network 1 and 3 composite support of liquid nitrogen frozen soil wall, Neng Goujie
It saves steel and concrete, project cost is relatively low；Using liquid nitrogen freezing, it is not necessarily to power consumption, is reduced environmental pollution and safe operation；
1 area occupied of protection network is small, and convenient and quick construction, noise pollution is small, is suitable for the engineering of various soil properties, highly practical.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, all things considered are all merely illustrative, not the only.Institute
Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.
Claims (9)
1. a kind of protection network and liquid nitrogen frozen soil wall composite supporting construction, it is characterised in that：Including protection network (1), anchor pole (2), liquid
Nitrogen frozen soil wall (3), concrete topping (4), the protection network (1) use active flexible protection network and are covered in the slope of foundation pit (5)
On face, described anchor pole (2) one end anchors protection network (1) by fore shaft beam (6), and the other end tilts through ground and liquid nitrogen frozen soil wall
(3) freeze to fix, the liquid nitrogen frozen soil wall (3) is in ground and is internally provided with freezing hole (31) and freezing pipe (32), institute
Concrete topping (4) is stated to be located at the top of foundation pit (5).
2. a kind of protection network according to claim 1 and liquid nitrogen frozen soil wall composite supporting construction, it is characterised in that：The liquid
It is mine resin that nitrogen frozen soil wall (3), which has multi-disc, anchor pole (2) material,.
3. a kind of protection network according to claim 1 and liquid nitrogen frozen soil wall composite supporting construction, it is characterised in that：It is described anti-
One layer of hard polyurethane foam (7) of protecting wire net (1) surface spraying.
4. the construction of a kind of protection network and liquid nitrogen frozen soil wall composite supporting construction according to any one of claim 1-3
Method, it is characterised in that：Include the following steps：
(1) the dangerous sundries for clearing up foundation pit (5) slope surface and top drills in foundation pit (5) slope surface, is hung along foundation pit (5) surrounding slope surface
Protection network (1)；
(2) it passes through protection network (1) inclination to squeeze into ground anchor pole (2), is anchored by fore shaft beam (6) after tensioning protection network (1)
One end of anchor pole (2), in slope surface spraying polyurethane rigid foam (7)；
(3) liquid nitrogen frozen soil wall (3) is set under ground, one is anchored at by the congelation and anchor pole (2) of liquid nitrogen frozen soil wall (3)
It rises, the specific method is as follows：
At the top of foundation pit (5) slope surface, freezing hole (31) is bored using vertical drilling machine, freezing hole (31) is in quincuncial arrangement, pitch of holes
0.6m-0.8m, every 6 freezing holes (31) are concatenated into one group, and installation is frozen wherein again after freezing hole (31) is crept into mud off
Knot pipe (32), liquid nitrogen supply tank car setting on ground from frozen position closer location, and connection includes system connecting tube and liquid supply pipe
Liquid nitrogen is transported in freezing pipe (32), freezes 11 days by liquid nitrogen feeding pipe inside, and nearby survey is additionally provided in freezing pipe (32)
Wen Guan, daily temperature detection monitoring project progress, each route is provided with the control of low temperature liquid nitrogen valve on the liquid nitrogen feeding pipe, owns
Exposed liquid nitrogen feeding pipe insulation foam plate or bat heat preservation stop perfusion liquid after the completion of waiting for liquid nitrogen frozen soil wall (3) construction
Nitrogen removes frozen construction relevant device；
(4) foundation pit (5) top jet concrete topping (5).
5. the construction method of a kind of protection network according to claim 4 and liquid nitrogen frozen soil wall composite supporting construction, feature
It is：In the step (3), by the pressure and temperature of heat sink and total valve control liquid nitrogen on liquid nitrogen storage tank, using every
The temperature and pressure for cut-off valve regulation freezing pipe (32) outlet being arranged in the corresponding route of a freezing pipe (32), liquid nitrogen storage tank outlet
Temperature control at -150 DEG C~-170 DEG C, pressure control is in 0.10MPa~0.15MPa, the temperature of freezing pipe (32) outlet
At -50 DEG C~-70 DEG C, pressure is controlled in 0.05MPa~0.1MPa for degree control.
6. the construction method of a kind of protection network according to claim 4 and liquid nitrogen frozen soil wall composite supporting construction, feature
It is：In the step (3), freezing pipe (32) selection Ф 108 × 8mm low carbon stainless steel pipes, temperature tube selection Ф 89 ×
5mm stainless-steel pipes, the liquid supply pipe and the system connecting tube select Ф 32 × 3.0mmR304 stainless steel tubes；The step
(3) it in, thaws to freezing pipe (32) perfusion hot water after stopping perfusion liquid nitrogen, freezing pipe (32) is pulled out after defrosting and removes jelly again later
Tie equipment.
7. the construction method of a kind of protection network according to claim 4 and liquid nitrogen frozen soil wall composite supporting construction, feature
It is：In the step (3), freezing pipe (32) selection Ф 108 × 8mm low-temperature resistant plastic pipes, temperature tube selection Ф 89 ×
5mm low-temperature resistant plastic pipes, the liquid supply pipe and the system connecting tube select Ф 32 × 3.0mmR304 low-temperature resistant plastic pipes.
8. the construction method of a kind of protection network according to claim 4 and liquid nitrogen frozen soil wall composite supporting construction, feature
It is：It is located in the step (3), at the top of the liquid nitrogen frozen soil wall (3) at earth's surface or less 1m-1.5m, the liquid nitrogen frozen soil wall
(3) soil layer, the protection network (1) above and the soil layer between liquid nitrogen frozen soil wall (3) each act as insulating layer.
9. the construction method of a kind of protection network according to claim 4 and liquid nitrogen frozen soil wall composite supporting construction, feature
It is：In the step (3), when liquid nitrogen feeding pipe is filled with liquid nitrogen for the first time, liquid nitrogen to be made to enter freezing system in gaseous form
Pipeline is pre-chilled 3-4 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810607756.0A CN108797603A (en) | 2018-06-13 | 2018-06-13 | A kind of protection network and liquid nitrogen frozen soil wall composite supporting construction and its construction method |
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| CN201810607756.0A CN108797603A (en) | 2018-06-13 | 2018-06-13 | A kind of protection network and liquid nitrogen frozen soil wall composite supporting construction and its construction method |
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| CN201810607756.0A Pending CN108797603A (en) | 2018-06-13 | 2018-06-13 | A kind of protection network and liquid nitrogen frozen soil wall composite supporting construction and its construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489922A (en) * | 2018-11-15 | 2019-03-19 | 华北科技学院 | It is a kind of for testing the experimental rig of flexible support mechanical property |
| CN111707530A (en) * | 2020-06-19 | 2020-09-25 | 威胜利工程有限公司 | Test piece for low-temperature anchoring performance test and temperature measurement structure thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489922A (en) * | 2018-11-15 | 2019-03-19 | 华北科技学院 | It is a kind of for testing the experimental rig of flexible support mechanical property |
| CN111707530A (en) * | 2020-06-19 | 2020-09-25 | 威胜利工程有限公司 | Test piece for low-temperature anchoring performance test and temperature measurement structure thereof |
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Application publication date: 20181113 |