CN108867714A - The pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant and its application method - Google Patents
The pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant and its application method Download PDFInfo
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- CN108867714A CN108867714A CN201810804418.6A CN201810804418A CN108867714A CN 108867714 A CN108867714 A CN 108867714A CN 201810804418 A CN201810804418 A CN 201810804418A CN 108867714 A CN108867714 A CN 108867714A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/14—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against frost heaves in soil
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The present invention relates to the pile foundations of a kind of anti-lifting by frost and thaw collapse from refrigerating plant and its application method, device includes stake side wall from fine frozen junction structure and lock, stake side wall is set to the periphery of pile foundation from fine frozen junction structure, it includes temperature sensor, temperature control equipment, control switch, liquid nitrogen storage tank, hosepipe and vacuum generator, temperature sensor is used to be located at the side wall of pile foundation, temperature sensor connects the temperature control equipment, temperature control equipment connects and controls control switch, one end of control switch connection liquid nitrogen storage tank and coiled pipe, liquid nitrogen storage tank is arranged close to pile foundation, hosepipe is set to the periphery of pile foundation, the other end of hosepipe connects vacuum generator, empty generator is arranged close to pile foundation, lock is set in pile foundation.The device makes pile foundation effectively resist uplift force caused by frozen soil expansive force and thaw collapse effect, is particularly suitable for preventing the pile foundation of the lifting by frost of transmission line of electricity column foot and thaw collapse in extremely frigid zones especially ever-frozen ground or frozen ground regions.
Description
Technical field
The present invention relates to the pile foundations of a kind of anti-lifting by frost and thaw collapse from refrigerating plant, belongs to infrastructure construction technical field.
Background technique
The demand for covering each area with information-based the whole network with the development of science and technology, for the basis of informatization
Facilities Construction demand is being continuously increased.Therefore, there will be a large amount of transmission line of electricity that will repair under the mal-conditions such as High aititude, severe cold
It builds.And the transmission line of electricity in permafrost area, usually because lifting by frost and thaw collapse cause to destroy, and repairs and need costly people
Power material resources cause serious economic loss, therefore in the construction and fortune of the Permafrost Areas such as Qinghai-Tibet Platean transmission line of electricity column foot
During battalion, it is ensured that the overall stability of frozen soil and column foot is primary task, becomes object concerned by people.
Currently, the construction technology and research for the anti-lifting by frost of permafrost region column foot and thaw collapse still have very big disadvantage, such as
Under：(1), heavy excavation is largely used in the transmission line of electricity column foot of Permafrost Area setting, the method for soil removal and replacement direct-burried, i.e., in advance
The frost zone of Frozen Ground Area is cut out, basis of formation hole, then will in foundation pit casting concrete basis, wait pour it is feeding
After the completion of shield, electric pole is inserted, then new soil is inserted in foundation pit, and is tamped with machine.But this mode is difficult to solve
Certainly Frozen Ground Area pile foundation is because of the effect of pulling out on caused by by horizontal and vertical Load Combination effect, to cause pile foundation because by freeze thawing
Ringing run-off the straight or the problem of toppling collapsed.(2), since the heat of hydration generated during poured in place concrete can be led
It causes frozen soil ambient temperature to increase, generates frozen soil and melt again, lead to the shakiness of pile foundation, or even the unstable failure of pile foundation can be directly contributed.
(3), the originally weak ecological environment of Han Qu will be destroyed to a certain extent by the way of digging up and filling in, frozen soil is caused to move back
Change, the pile foundation thaw collapse disaster problem that will lead to.(4), during site operation because by construction activities include vehicle driving and
Prolonged material stacking etc. is to the perturbation action of ever-frozen ground, the problem of caused frozen soil bearing capacity decline；Meanwhile it is existing
Construction cost can be aggravated by having the construction method of Frozen Ground Area.
The traditional construction method in Frozen Ground Area changes the cast-in-place concrete pile foundation banketed, but this construction using heavy excavation
Method be difficult to solve the problems, such as pile foundation because by permafrost region frost-heave force generate on topple caused by the effect of pulling out；Cast-in-place concrete simultaneously
Due to the generation of the heat of hydration, cause around answering for frozen soil melt, reduce the bearing capacity of frozen soil；In addition to this, Frozen Ground Area is caused to be frozen
It pulls out also usually ignored with the disturbance and material stacking constructed in the factor of thaw collapse phenomenon.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides the pile foundation of anti-lifting by frost and thaw collapse a kind of from refrigerating plant
And application method, which not only can effectively prevent transmission line of electricity pile foundation, and unstability is inclined due to the uplift force that Frost heave of frozen soil power generates
Tiltedly, while it can be avoided and lead to pile foundation sinking unstability because frozen soil melts again, and then destroy transmission line of electricity, solve ever-frozen ground and season
The column foot stability problem of section property frozen soil.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include：
The pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant, including stake side wall is from fine frozen junction structure and lock, described
Stake side wall is set to the periphery of pile foundation from fine frozen junction structure, and the lock is set on the outer wall of pile foundation, and the stake side wall freezes certainly
Frozen structure includes temperature sensor, temperature control equipment, control switch, liquid nitrogen storage tank, hosepipe and vacuum generator, institute
It states temperature sensor and connects the temperature control equipment, the temperature control for being located at the side wall of pile foundation, the temperature sensor
Device processed connects and controls the control switch, and the control switch connects one end of the liquid nitrogen storage tank and coiled pipe, institute
It states liquid nitrogen storage tank to be arranged close to the pile foundation, the hosepipe is set to the periphery of the pile foundation, the other end of the hosepipe
The vacuum generator is connected, the sky generator is arranged close to the pile foundation.
The pile foundation of anti-lifting by frost as described above and thaw collapse is from refrigerating plant, it is preferable that the lock includes two locking plates, spiral shells
The shape of screw bolt and nut, described two locking plates is adapted to pile foundation, is fixed for being centered around pile foundation, and by screw bolt and nut.
The pile foundation of anti-lifting by frost as described above and thaw collapse is from refrigerating plant, it is preferable that the lock further includes multiple hammerlocks
With multiple lock wings, one end of the hammerlock is fixed on the locking plate, and the other end is fixedly connected with the lock wing, the hammerlock and lock
Finned at a T font, the junction of described two locking plates is equipped with hammerlock, and hammerlock is equipped with two rows of bolts hole, passes through bolt
Two locking plates are fixed with nut, the outboard end of hammerlock is fixedly connected with lock wing.
The pile foundation of anti-lifting by frost as described above and thaw collapse is from refrigerating plant, it is preferable that is equipped between the screw bolt and nut
Rubber sheet gasket.
The pile foundation of anti-lifting by frost as described above and thaw collapse is from refrigerating plant, it is preferable that the lock be equipped with it is multiple, in pile foundation
The upper lock is arranged at interval of 2~6m.
The pile foundation of anti-lifting by frost as described above and thaw collapse is from refrigerating plant, it is preferable that the hammerlock of multiple locks is perpendicular
Histogram is to being the setting of same straight line.
The pile foundation of anti-lifting by frost as described above and thaw collapse is from refrigerating plant, it is preferable that the lock wing with a thickness of 15mm
~20mm, width are 60mm~80mm, and the length of the hammerlock is 40mm~80mm.
The pile foundation of anti-lifting by frost as described above and thaw collapse is from refrigerating plant, it is preferable that the hosepipe is copper material, institute
Stating lock is steel material.
A kind of application method of the pile foundation of anti-lifting by frost and thaw collapse from refrigerating plant comprising following steps：
S1, it is punched in advance on the position of setting power transmission line column foot, the diameter in hole is greater than the 100mm of Pile Diameter extremely
150mm；
S2, temperature sensor is embedded in advance in prefabricated concrete filled steel tube or concrete rigid stake, and by data line
It draws；
S3, it will be latched by on-site consolidation, be installed in prefabricated pile foundation by screw bolt and nut；
S4, the prefabricated pile foundation that step S3 is installed to lock are put into the hole accomplished fluently in advance in step S1, and in prefabricated pile
The surrounding of base places hosepipe, and reserves the export and import of hosepipe；
S5, mud is poured into the gap in pile foundation and hole, while mud being consolidated, keep conventional mud sufficiently closely knit；
S6, the hosepipe import for accessing nitrogen storage tank, occur in the outlet of the hosepipe and vacuum
Device is connected；
S7, it is mounted directly control switch in nitrogen storage tank, and is connected by control switch with the import of hosepipe, controlled
System switch is connected with temperature control equipment simultaneously；
S8, the data line cut-in temperature control device for drawing pile foundation, and it is connect one with control switch by conducting wire
It rises.
Application method as described above, it is preferable that in step sl, the diameter in the hole be greater than Pile Diameter 100~
150mm。
(3) beneficial effect
The beneficial effects of the invention are as follows：
The pile foundation of anti-lifting by frost provided by the invention and thaw collapse can make pile foundation effectively resist frozen soil expansion from refrigerating plant
Uplift force caused by power and thaw collapse effect, are particularly suitable in extremely frigid zones especially ever-frozen ground or frost zone
Area prevents the pile foundation of the lifting by frost of transmission line of electricity column foot and thaw collapse.It not only effectively prevent transmission line of electricity pile foundation to produce because of Frost heave of frozen soil power
Raw uplift force and destabilizing, while avoiding and lead to pile foundation sinking unstability because frozen soil melts again, and then destroying transmission line of electricity.It should
Economic loss caused by pile foundation inclination caused by the use of device can be reduced because of lifting by frost thaw collapse, while the construction procedure letter of the device
It is single, it is pollution-free, it is easily operated, and structure uses prefabricated pile basis, avoids influence of the construction technology to permafrost region.
Detailed description of the invention
Fig. 1 be one embodiment of the present invention anti-lifting by frost and thaw collapse pile foundation from the schematic diagram of refrigerating plant；
Fig. 2 is the structural schematic diagram of lock.
【Description of symbols】
1：Pile foundation；
2：Lock；
3：Temperature sensor；
4：Temperature control equipment；
5：Control switch；
6：Liquid nitrogen storage tank；
7：Hosepipe；
8：Vacuum generator；
9：Outdoor channel；
10：Bolt；
11：Hammerlock；
12：Lock wing.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
Embodiment 1
The pile foundation of anti-lifting by frost and thaw collapse from fine frozen knot device and resists pile foundation because freezing from refrigerating plant, including by stake side wall
The locker composition of effect is pulled out in native frost-heave force generation.As shown in Figure 1, stake side wall is set to pile foundation 1 from fine frozen knot device
Periphery, lock 2 is fixed on the outer wall of pile foundation 1 by buckle lock structure, stake side wall from fine frozen junction structure include temperature sensing
Device 3, temperature control equipment 4, control switch 5, liquid nitrogen storage tank 6, hosepipe 7 and vacuum generator 8, temperature sensor 3 are used for
It is located at the side wall of pile foundation 1, temperature sensor 3 connects temperature control equipment 4, the connection control of temperature control equipment 4 by data line
Switch 5, and control switch 5 is opened or closed by temperature control equipment 4, one end of control switch 5 connects liquid nitrogen storage tank, separately
One end connects one end of coiled pipe 6, and liquid nitrogen storage tank 6 is arranged close to pile foundation 1, and hosepipe 7 is set to the periphery of pile foundation 1, on ground
Lower section is arranged around pile foundation 1, and the other end of hosepipe 7 connects vacuum generator 8, and vacuum generator 8 is arranged close to pile foundation 1.Tool
Body, temperature sensor 3 can be buried in Prefabricated concrete-filled steel tube stake or precast concrete rigid pile, and temperature sensor 3 is used for
Temperature sensor Pt100 can be used in the temperature of real-time monitoring pile foundation, is sent to temperature control equipment 4 by data line.
Temperature control equipment 4, can when reaching the stationary value of design for receiving the temperature information that temperature sensor 3 transmits
To transmit signals to control switch 5, discharge liquid nitrogen storage tank 6 to coiled pipe 7 liquid nitrogen.Copper snake can be used in coiled pipe 7
Type pipe, one end are connected with nitrogen storage tank 6, and one end is connected with vacuum generator 8, and in copper hosepipe gas occurs for liquid nitrogen
Change, copper hosepipe is caused to turn cold, to absorb the temperature of surrounding soil, the environment temperature that may cause to surrounding soil is reduced
To -100 DEG C or less.
One end of vacuum generator 8 connects hosepipe 7, and one end connects outdoor channel 9, and the compressed air of open-air seasoning is true
It is discharged into greatly after being mixed in empty generator 8 with the liquid nitrogen to have gasified from hosepipe 7 into vacuum generator 8 by outdoor channel 9
In gas.
Lock can be used for resisting pile foundation because of the effect of pulling out in Frost heave of frozen soil power, while play a supporting role when frozen soil melts again,
Slow down pile foundation thaw collapse.It can be by the ring steel lockmaking button of precast splice type, as shown in Fig. 2, latching when pile foundation is cylindrical
It is connected by two semicircle annular steel locking plate bolts 10 with nut, the shape and pile foundation of semicircle annular steel locking plate are suitable
Match, hammerlock 11 and lock wing 12 are fixed on locking plate, one end of hammerlock 11 is fixedly welded on locking plate, and the other end of hammerlock 11 is solid
Surely have a lock wing 12, lock wing and hammerlock 11 form a T shape, the lock wing 12 of lock for resist Frost heave of frozen soil power on the effect of pulling out,
Its thickness can be set as 15mm~20mm, can be specifically adjusted according to Practical Project, and width can be set as 60mm~80mm, can basis
Practical Project is adjusted, and the length of hammerlock 11 can be 40mm~80mm, can be adjusted according to Practical Project.In locking plate
Both ends can be equipped with hammerlock 11, and the other end of hammerlock 11 is equipped with the lock wing 12 perpendicular to hammerlock 11, in the lock of the locking plate for docking
It is respectively provided with two rows of bolts hole on arm, locking plate is fixed in pile foundation using screw bolt and nut.
Further, it can be additionally provided with rubber sheet gasket between screw bolt and nut, combine closely for bolts and nuts, because of its tool
There is certain elasticity, if the frost-heaving deformation inside pile foundation generation, can be used for protecting between two semicircle annular steels locks
Connection has elasticity, alleviates the pressure that pile foundation frost-heaving deformation latches steel, and protection steel lock will not cause to connect because of compression
Brittle break occurs for place.The ring steel lockmaking button of precast splice type can be by factory process, and assembly, easy for construction at the scene, and
It is at low cost.The principle that liquid nitrogen gasification heat absorption is utilized from fine frozen knot device in the present invention, by temperature control equipment come in real time
Temperature in stake is monitored, when reaching preset temperature, liquid nitrogen will be made to enter copper hosepipe by control switch, gasification is inhaled
Heat causes the temperature of frozen soil to reduce.The present apparatus, which is applicable not only to seasonal frozen soil region, to be prevented from leading to stake because frost zone melts again
Base thaw collapse, causes pile foundation inclination, is also applied for preventing Permafrost Area because climate warming causes the frozen soil that may occur to melt, with
And because the operation phase uncertain factor caused by frozen soil frozen state weaken, the case where causing pile foundation inclination.And precast assembly
The purpose of the ring steel lockmaking buckle device of formula cannot be only used for resisting pile foundation because of the effect of pulling out in Frost heave of frozen soil power, while in frozen soil
It plays a supporting role when melting again, slows down pile foundation thaw collapse.The two sufficiently combines, and plays respective advantage, resists permafrost region jointly
The lifting by frost and thaw collapse phenomenon of pile foundation.
The installation and application of above-mentioned apparatus is as follows：
S1, it is punched in advance on the position of setting power transmission line column foot, the diameter in hole is greater than the 100mm of Pile Diameter extremely
150mm；
S2, temperature sensor is embedded in advance in prefabricated concrete filled steel tube or concrete rigid stake, and by data line
It draws；
S3, it will be latched by on-site consolidation, be installed in prefabricated pile foundation by screw bolt and nut；Between wherein latching
Every 2-6m installs a lock away from being, and hammerlock in vertical direction is same straight line setting between adjacent lock, can be according to reality
In the engineering of border, the length of pile foundation carrys out the quantity of the ring steel lockmaking button of reasonable distribution precast splice type；
S4, the prefabricated pile foundation for installing lock is put into the hole accomplished fluently in advance in step S1 by machinery, and prefabricated
The surrounding of stake places hosepipe, and reserves the export and import of copper hosepipe；
S5, common mud is poured into the gap in pile foundation and hole, the ingredient of mud is clay and sand, ratio 1：6 or
7, while mud being consolidated, keep conventional mud sufficiently closely knit；Wherein, related experiment shows that the gap in beaten hole wants bigger
In the 100mm of Pile Diameter be best；
S6, one end of copper hosepipe import is used to access nitrogen storage tank, other end outlet and vacuum generator phase
Even；
S7, nitrogen storage tank one end be mounted directly control switch, and pass through the import of control switch and copper hosepipe
It is connected, control switch is then connected with for temperature control equipment；
S8, the data line cut-in temperature control device 9 for then drawing pile foundation, and it is connected by conducting wire and control switch
It connects together, the temperature change in real-time monitoring stake.
Specifically in practical application, when reaching preset temperature value, temperature control equipment will be incited somebody to action by control switch
The liquid nitrogen of liquid nitrogen storage tank discharges；Liquid nitrogen after release enters in hosepipe, due to the gasification of liquid nitrogen, makes the temperature of hosepipe
Degree decline, absorbs copper hosepipe ambient temperature, environment temperature can be reduced to -100 DEG C or less；When dry compression
When air passes through vacuum generator, will form negative pressure in vacuum generator, under the action of negative pressure, by the liquid nitrogen of gasification with it is swollen
Compressed air mixing after swollen, by outdoor channel, is discharged into atmosphere.
The above described is only a preferred embodiment of the present invention, being not the limitation for doing other forms to the present invention, appoint
What those skilled in the art can use the equivalence enforcement that technology contents disclosed above were changed or be modified as equivalent variations
Example.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to the above embodiments
What simple modification, equivalent variations and remodeling, still falls within the protection scope of technical solution of the present invention.
Claims (10)
1. the pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant, which is characterized in that it includes stake side wall from fine frozen junction structure
And lock, the stake side wall are set to the periphery of pile foundation from fine frozen junction structure, the lock is set on the outer wall of pile foundation, the stake
Side wall from fine frozen junction structure include temperature sensor, temperature control equipment, control switch, liquid nitrogen storage tank, hosepipe and true
Empty generator, the temperature sensor are used to be located at the side wall of pile foundation, and the temperature sensor connects the temperature control equipment,
The temperature control equipment connects and controls the control switch, and the control switch connects the liquid nitrogen storage tank and coiled pipe
One end, the liquid nitrogen storage tank is arranged close to the pile foundation, and the hosepipe is set to the periphery of the pile foundation, the hosepipe
The other end connect the vacuum generator, the sky generator is arranged close to the pile foundation.
2. pile foundation as described in claim 1 is from refrigerating plant, which is characterized in that the lock include two locking plates, bolt and
The shape of nut, described two locking plates is adapted to pile foundation, is fixed for being centered around pile foundation, and by screw bolt and nut.
3. pile foundation as claimed in claim 2 is from refrigerating plant, which is characterized in that the lock further includes multiple hammerlocks and multiple
Lock wing, one end of the hammerlock is fixed on the locking plate, and the other end is fixedly connected with the lock wing, the hammerlock and lock it is finned at
One T font, the junction of described two locking plates are equipped with hammerlock, and hammerlock is equipped with two rows of bolts hole, passes through screw bolt and nut
Two locking plates are fixed, the outboard end of hammerlock is fixedly connected with lock wing.
4. pile foundation as claimed in claim 3 is from refrigerating plant, which is characterized in that the lock is equipped with multiple, the institute in pile foundation
Lock is stated to be arranged at interval of 2~6m.
5. pile foundation as claimed in claim 4 is from refrigerating plant, which is characterized in that the hammerlock of multiple locks is in vertical direction
It is same straight line setting.
6. pile foundation as claimed in claim 2 or claim 3 is from refrigerating plant, which is characterized in that be equipped with rubber between the screw bolt and nut
Glue gasket.
7. pile foundation as claimed in claim 3 is from refrigerating plant, which is characterized in that the lock wing with a thickness of 15mm~
20mm, width are 60mm~80mm, and the length of the hammerlock is 40mm~80mm.
8. pile foundation as described in any one of claim 1-7 is from refrigerating plant, which is characterized in that the hosepipe is copper
Material, the lock are steel material.
9. the pile foundation of a kind of anti-lifting by frost and thaw collapse is from the application method of refrigerating plant comprising following steps：
S1, it is punched in advance on the position of setting power transmission line column foot, the diameter in hole is greater than the 100mm to 150mm of Pile Diameter；
S2, temperature sensor is embedded in prefabricated concrete filled steel tube or concrete rigid stake in advance, and data line is drawn；
S3, it will be latched by on-site consolidation, be installed in prefabricated pile foundation by screw bolt and nut；
S4, the prefabricated pile foundation that step S3 is installed to lock are put into the hole accomplished fluently in advance in step S1, and in prefabricated pile foundation
Surrounding places hosepipe, and reserves the export and import of hosepipe；
S5, mud is poured into the gap in pile foundation and hole, while mud being consolidated, keep conventional mud sufficiently closely knit；
S6, the hosepipe import for accessing nitrogen storage tank, in outlet and the vacuum generator phase of the hosepipe
Even；
S7, it is mounted directly control switch in nitrogen storage tank, and is connected by control switch with the import of hosepipe, control is opened
It closes and is connected simultaneously with temperature control equipment；
S8, the data line cut-in temperature control device for drawing pile foundation, and it is connected by conducting wire and control switch.
10. application method as claimed in claim 9, which is characterized in that in step sl, it is straight that the diameter in the hole is greater than pile foundation
100~150mm of diameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810804418.6A CN108867714A (en) | 2018-07-20 | 2018-07-20 | The pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant and its application method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810804418.6A CN108867714A (en) | 2018-07-20 | 2018-07-20 | The pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant and its application method |
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| CN108867714A true CN108867714A (en) | 2018-11-23 |
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ID=64303671
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| CN109610522A (en) * | 2018-12-11 | 2019-04-12 | 长春工程学院 | The light platform structure of frost damage prevention |
| CN110424377A (en) * | 2019-08-21 | 2019-11-08 | 东北大学 | A kind of anti-freeze-thaw damage stake of intelligent temperature control |
| CN111254950A (en) * | 2020-02-18 | 2020-06-09 | 河海大学 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
| CN111910669A (en) * | 2020-08-10 | 2020-11-10 | 华北电力大学（保定） | Telescopic steel pipe spiral pile foundation for active cooling of frozen soil area and method |
| CN112281928A (en) * | 2020-11-03 | 2021-01-29 | 北京万兴建筑集团有限公司 | Anti-floating anchor rod centering positioning device for single main rib and manufacturing method thereof |
| CN114319463A (en) * | 2022-01-12 | 2022-04-12 | 国网甘肃省电力公司建设分公司 | Scale-type frost heaving resistant pile foundation |
| CN115176549A (en) * | 2022-09-14 | 2022-10-14 | 中国煤炭地质总局勘查研究总院 | Ecological restoration method for seasonal frozen soil in plateau alpine region |
| CN116290122A (en) * | 2022-10-20 | 2023-06-23 | 中国科学院西北生态环境资源研究院 | Use method of anti-freezing and anti-thawing device |
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| CN110424377A (en) * | 2019-08-21 | 2019-11-08 | 东北大学 | A kind of anti-freeze-thaw damage stake of intelligent temperature control |
| CN111254950B (en) * | 2020-02-18 | 2021-06-01 | 河海大学 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
| CN111254950A (en) * | 2020-02-18 | 2020-06-09 | 河海大学 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
| CN111910669B (en) * | 2020-08-10 | 2021-09-03 | 华北电力大学（保定） | Telescopic steel pipe spiral pile foundation for active cooling of frozen soil area and use method |
| CN111910669A (en) * | 2020-08-10 | 2020-11-10 | 华北电力大学（保定） | Telescopic steel pipe spiral pile foundation for active cooling of frozen soil area and method |
| CN112281928A (en) * | 2020-11-03 | 2021-01-29 | 北京万兴建筑集团有限公司 | Anti-floating anchor rod centering positioning device for single main rib and manufacturing method thereof |
| CN112281928B (en) * | 2020-11-03 | 2022-03-08 | 北京万兴建筑集团有限公司 | Anti-floating anchor rod centering positioning device for single main rib and manufacturing method thereof |
| CN114319463A (en) * | 2022-01-12 | 2022-04-12 | 国网甘肃省电力公司建设分公司 | Scale-type frost heaving resistant pile foundation |
| CN114319463B (en) * | 2022-01-12 | 2023-06-27 | 国网甘肃省电力公司建设分公司 | Scale-type frost heaving resistant pile foundation |
| CN115176549A (en) * | 2022-09-14 | 2022-10-14 | 中国煤炭地质总局勘查研究总院 | Ecological restoration method for seasonal frozen soil in plateau alpine region |
| CN116290122A (en) * | 2022-10-20 | 2023-06-23 | 中国科学院西北生态环境资源研究院 | Use method of anti-freezing and anti-thawing device |
| CN116290122B (en) * | 2022-10-20 | 2023-08-11 | 中国科学院西北生态环境资源研究院 | Use method of anti-freezing and anti-thawing device |
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Application publication date: 20181123 |