CN105484261B - A kind of expansion type marmem anchor pole and its anchoring construction technique - Google Patents
A kind of expansion type marmem anchor pole and its anchoring construction technique Download PDFInfo
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- CN105484261B CN105484261B CN201511029578.0A CN201511029578A CN105484261B CN 105484261 B CN105484261 B CN 105484261B CN 201511029578 A CN201511029578 A CN 201511029578A CN 105484261 B CN105484261 B CN 105484261B
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- Prior art keywords
- anchor pole
- shape memory
- marmem
- rock
- rod
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Classifications
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- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A kind of expansion type marmem anchor pole and its anchoring construction technique, its suspension roof support structure includes the body of rod and Rock And Soil, there is suspended deck structure in the end of the body of rod, annular shape Memory Alloy member is set in the end of the body of rod, the two combination is connected and composed by integral marmem anchor pole by cushion cap, prebored hole is provided with Rock And Soil, marmem anchor pole is plugged in prebored hole, the marmem anchor pole for the Shape Memory Alloy member composition that shape memory is replied occurs completely, then passes through the locking of structures, fastener, supporting plate and pedestal；Crucial construction technology then forms marmem anchor pole, the anchor rod anchored system of cylindrical type alloy and expansion type alloy anchoring-bolt system to prepare annular shape Memory Alloy member, final to obtain the anchor rod anchored structure of expansion type alloy.The present invention can improve anchor force (withdrawal resistance), durability and the scope of application of anchor structure, reach the purpose to Rock And Soil supporting, and construction technology is simple, and easy to operate, effect is safe and reliable.
Description
Technical field
The invention belongs to Geotechnical Engineering field, more particularly, to a kind of expansion type marmem anchor pole and its
Anchoring construction technique.
Background technology
Suspension roof support structure is a kind of new tension member system, will slide Rock And Soil by anchor pole and stablizes Rock And Soil
Tight union is integrated, and greatly increases the skid resistance of each aspect of Rock And Soil, while had each anchor pole by domatic upper Vierendeel girder again
A bigger entirety is linked into effect, a reinforcement system from outward appearance to inner essence is formd, and then reaching prevents overall side slope from losing
Steady purpose, is a kind of effective antiskid anchor structure.Therefore, suspension roof support structure has been widely used in loose earth or rock
Matter side slope, foundation ditch, mine, underground engineering, dam body, navigation channel, reservoir, tunnel and it is anti-incline, in the engineering such as float Structure, be ground work
A kind of system that anchorage technology is popularized the most in journey, it has also become the important component of modern building technology.In engineering construction,
Supporting construction is supported using anchor pole, to safeguard the stabilization of unstable Rock And Soil, applied to simplifying support, improvement execution conditions and quickening
It can serve in terms of work progress huge.
As the important parameter of suspension roof support structure, its prestressing force applied, withdrawal resistance (bond stress and shearing resistance), from
By the key index such as segment length and anchoring depth be always field of engineering technology in four difficult points, if apply prestressing force damage
Mistake is more, then the rock-soil layer anchored is difficult to obtain sufficiently high skid resistance or shearing strength so that the just big discounting of support anchoring effect
Button；If the withdrawal resistance of anchor pole is too low, the security of anchoring Rock And Soil cannot be improved；If the freedom length of anchor pole is too short,
Then its loss of prestress is more, and axis force of anchor is more unstable, weakens the effect of anchoring；If the anchoring depth of anchor pole is too short,
Then its withdrawal resistance provided is reduced by, and the pulling force that anchor pole is born just is reduced, the possibility increase being pulled out so that the branch of Rock And Soil
Shield security cannot be ensured.
Traditional suspension roof support structure mainly has cylindrical anchor pole, end expanding type anchor pole and continuous ball-type anchor pole, these
There is some defects or deficiency in structure, i.e. on the one hand in anchoring, because anchoring requires there is certain anchorage length, therefore
Cause the loss of prestress of anchor pole at work larger, while also requiring that pull bar and its periphery cement mortar have certain bond stress
Limitation, otherwise, anchor pole can not provide enough withdrawal resistances；On the other hand, traditional suspension roof support structure is applied in drilling
During work, being relatively large in diameter for required drilling is therefore, comparatively, bigger to the soil disturbance around drilling, changes original
The distribution of stress field, increases the weight stress release of Rock And Soil around, in addition, with the increase of bore diameter, engineering into
This is also greatly increased, and the expense drilled in construction typically constitutes from more than the 30% of totle drilling cost, sometimes even over 50%, if adding again
Upper grouting expense, the cost of engineering is just higher.From this, these shortcomings directly affect rock-soil layer anchor pole bearing capacity,
The cost of efficiency of construction and whole support engineering.Therefore, for the construction technology that traditional suspension roof support structure is used,
All cannot concurrently reach that loss of prestress is small, anchoring depth is short, or even without anchoring section, drill small, wide adaptation range the advantages of.
The content of the invention
In order to overcome the above-mentioned deficiency of prior art, the present invention provide a kind of expansion type marmem anchor pole and its
Anchoring construction technique, it is possible to increase anchor force (withdrawal resistance), durability and the scope of application of anchor structure, reaches to Rock And Soil branch
The purpose of shield, in addition, this invention construction technology is simple and convenient to operate, effect is safe and reliable.
The present invention solve its technical problem use technical scheme be：A kind of supporting of expansion type marmem anchor pole
Structure, including the body of rod and Rock And Soil, have suspended deck structure in the end of the body of rod, and annular shape Memory Alloy member is set in
The end of the body of rod, the two combination is connected and composed preboring is provided with integral marmem anchor pole, Rock And Soil by cushion cap
Hole, marmem anchor pole is plugged in prebored hole, and the Shape Memory Alloy member that shape memory is replied, structure occur completely
Into marmem anchor pole, then pass through structures, fastener, supporting plate and pedestal lock.
A kind of anchoring construction technique of expansion type marmem anchor pole, comprises the following steps：
(1) preparation of annular shape Memory Alloy member：Machining operation is used under alloy mother phase state, by shape
Memorial alloy blank is shaped as the initial alloy component of annular, the internal diameter and external diameter of rod body phase of initial alloy component cylinder
Together, shape memory processing then is carried out to it, under the temperature environment more much lower than phase change transition temperature, in martensite shape
The alloy components of state carry out mechanical compress deformation, are finally processed into as annular shape Memory Alloy member；
(2) formation of marmem anchor pole：Less than under phase change transition temperature, by annular shape Memory Alloy member
The end of the body of rod is enclosed on, both is connected into one by the cushion cap of rod end, that is, constitutes marmem anchor pole；
(3) formation of the anchor rod anchored system of cylindrical type alloy：Preservative treatment, Ran Houzai are carried out to marmem anchor pole
Marmem anchor pole is promptly placed in the prebored hole of Rock And Soil, the anchor rod anchored system of cylindrical type alloy has been obtained；
(4) formation of expansion type alloy anchoring-bolt system：By the temperature at rock-soil layer place, annular shape memorial alloy structure
Part is gradually increased to after phase change transition temperature, and alloy material automatically will carry out the transformation of martensite reverse transformation in itself and occur list
Journey shape memory recovery effect, reduces its height, and outer annular diameter expands, and is finally converted into the alloy structure for large-diameter annual
Part (1), as expansion type alloy anchoring-bolt system；
(5) the anchor rod anchored structure of expansion type alloy is obtained：When shape note occurs completely for annular shape Memory Alloy member
Recall after reply, tensioning and locking are carried out to expansion type alloy anchoring-bolt system by structures, fastener, supporting plate and pedestal, obtained
To the anchor rod anchored structure of expansion type alloy.
Compared with prior art, the invention has the advantages that：
1st, the boring aperture needed for the invention is small, reduces the disturbance to Rock And Soil around, improves the withdrawal resistance of anchor pole,
And aperture is small may not necessarily to set centralizer and progress the process such as to be in the milk, and reduce the cost of anchor structure.
2nd, construction technology is simple and convenient to operate：Annular shape Memory Alloy member need to only be heated by rock-soil layer
Heating, it is possible to provide the purpose of anchor force, the size and mode of anchor force can be more easily by with memory effects
Annular shape Memory Alloy member is controlled, and anchor force is big as required, then the alloy components size designed is larger, as expand
Type structure.
3rd, it is safe and reliable：Because the freedom length of anchor pole is longer, close to the size of the body of rod, then its loss of prestress is few,
Axis force of anchor is stable, enhances the effect of anchoring in rock and soil, improves the safe and reliable of Rock And Soil.
4th, overall structure durability is high：There is larger restoring force and deformation due to annular shape Memory Alloy member, it is good
The advantages of corrosion resistance well, preferable plasticity, higher intensity and fatigue life length and small such environmental effects so that anchor
The durability of bar structure is higher.
5th, it is applied widely：The anchoring body that cement mortar or cement mortar are constituted is with annular shape Memory Alloy member come generation
Replace, significantly expand the application of anchor structure so that such anchor pole is applicable not only to all kinds of weak soil soil properties, Er Qieshi
For all kinds of harder Rock And Soils, especially, rock matter layer is also applied for；Certainly, in order to improve the withdrawal resistance of anchor structure, also may be used
The anchor rod anchored structure design of alloy is turned into alloy anchor cable structure.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the anchor rod anchored work progress flow chart of the present invention.
Fig. 2 is the anchor structure floor map of alloy anchor pole of the present invention.
Fig. 3 is the structural representation that marmem anchor pole is placed in Rock And Soil.
Fig. 4 is the floor map of the body of rod in the present invention.
Fig. 5 is the structural representation of annular Shape Memory Alloy member in Fig. 3.
In figure, 1, the alloy components of large-diameter annual, 2, the body of rod, 3, centralizer, 4, structures, 5, Rock And Soil, 6, fastening
Device, 7, supporting plate, 8, pedestal, 9, cushion cap, 10, annular shape Memory Alloy member.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to protection scope of the present invention.
Fig. 2 to Fig. 5 shows a kind of expansion type shape in the structural representation of a preferred embodiment of the invention, figure
The supporting construction of memorial alloy anchor pole, including the body of rod 2 and Rock And Soil 5, have the structure of cushion cap 9 in the end of the body of rod 2, annular
Shape Memory Alloy member 10 is set in the end of the body of rod 2, and the two combination is connected and composed into integral shape by cushion cap 9 remembered
Recall alloy anchor pole, while cushion cap 9 can also make the body of rod 2 bear the design load of defined tensile load, Rock And Soil 5 is interior to be provided with preboring
Hole, marmem anchor pole is plugged in prebored hole, and the Shape Memory Alloy member composition that shape memory is replied occurs completely
Marmem anchor pole, then locked by structures 4, fastener 6, supporting plate 7 and pedestal 8.
In order to which the Rock And Soil 5 reduced around hole is disturbed, the aperture of the prebored hole of the Rock And Soil 5 is slightly larger than the chi of the body of rod 2
It is very little；The depth of prebored hole and the length of anchor pole are close, and the inclination angle of prebored hole is 10 °~35 °.
, can be in the correct position in the prebored hole of the Rock And Soil 5 when the aperture of the prebored hole in Rock And Soil 5 is larger
Centralizer 3 is set.For the positioning of marmem anchor pole, the center for making it be placed in prebored hole prevents the body of rod 2 from producing
Hole wall is stirred when big amount of deflection and insertion prebored hole, and ensures that the body of rod 2 has the cement mortar protective layer of adequate thickness.
Referring to Fig. 1 anchor rod anchored work progress flow chart of the invention, one kind uses expansion type marmem anchor
The anchoring construction technique of bar, comprises the following steps：
(1) preparation of annular shape Memory Alloy member 10：Machining operation is used under alloy mother phase state, by shape
The initial alloy component that the processing of shape memory alloys blank is circularized, the internal diameter of initial alloy component cylinder is identical with the external diameter of the body of rod 2,
Then shape memory processing is carried out to it, under the temperature environment more much lower than phase change transition temperature, in martensitic state
Alloy components carry out mechanical compress deformation, be finally processed into as annular shape Memory Alloy member 10；Because stress draws
Martensitic traoformation is played so that after compression terminates, annular shape Memory Alloy member 10 leaves very big residual deformation, now
The height of Shape Memory Alloy member 10 has been above the height of initial alloy component, and its outer diameter dimension is less than initial alloy
Component, both internal diameters are identical, and annular shape Memory Alloy member 10 now only has one way within the scope of certain temperature
SME, the phase change transition temperature that this process is set should be slightly lower than the temperature of Rock And Soil 5 at expansion.
(2) formation of marmem anchor pole：Less than under phase change transition temperature, by annular shape Memory Alloy member
10 are enclosed on the end of the body of rod 2, both is connected into one by the cushion cap 9 of the end of the body of rod 2, that is, constitute marmem
Anchor pole；
(3) formation of the anchor rod anchored system of cylindrical type alloy：Preservative treatment is carried out to marmem anchor pole, then
Marmem anchor pole is promptly placed in the prebored hole of Rock And Soil 5 again, cylindrical type alloy anchorage body has been obtained
System；
(4) formation of expansion type alloy anchoring-bolt system：By the temperature at rock-soil layer place, annular shape memorial alloy structure
Part 10 is gradually increased to after phase change transition temperature, and alloy material will automatically carry out martensite reverse transformation transformation in itself, and send out
Raw one-way shape memory recovery effect, reduces its height, and outer annular diameter expands, and is finally converted into the conjunction for large-diameter annual
Golden component (1), as expansion type alloy anchoring-bolt system；
(5) the anchor rod anchored structure of expansion type alloy is obtained：When shape occurs completely for annular shape Memory Alloy member 10
After memory is replied, tensioning and lock are carried out by structures 4, fastener 6,8 pairs of expansion type alloy anchoring-bolt systems of supporting plate 7 and pedestal
It is fixed, obtain the anchor rod anchored structure of expansion type alloy.
Laid in the step (3) before marmem anchor pole, ensure annular shape Memory Alloy member 10
Temperature is less than its phase change transition temperature.
Put in the step (3) before marmem anchor pole, centralizer 3 is set in the prebored hole of Rock And Soil 5.It is suitable
When aperture for the prebored hole in Rock And Soil 5 is larger, marmem anchor pole is positioned, it is placed in prebored hole
Center, prevents the body of rod 2 from stirring hole wall when producing excessive amount of deflection and insertion prebored hole, and ensure that the body of rod 2 has adequate thickness
Cement mortar protective layer.
The aperture of prebored hole is disturbed close to the outside dimension of the body of rod 2 with the Rock And Soil 5 reduced around hole in the Rock And Soil 5
It is dynamic；The depth of prebored hole and the length of anchor pole are close, and the inclination angle of prebored hole is advisable with 10 °~35 °.
As shown in Fig. 2 this structure specifically anchors working mechanism is：When the body of rod 2 of the anchor rod anchored structure of expansion type alloy
During stress, pulling force passes to the alloy components 1 of large-diameter annual by the body of rod 2 first, then, and by the alloy structure of large-diameter annual
Part 1 is passed to around it in Rock And Soil 5 by the bonding frictional strength between rock soil medium, eventually through expansion type alloy anchor pole anchor
Fixing structure serves the effect for reinforcing Rock And Soil 5.
From said structure, the present invention is by the basis of traditional anchor rod anchored structure, original by cement bonded sand
The anchoring body of slurry or cement mortar composition is changed to the alloy components 1 of large-diameter annual to replace, by means of marmem (such as nickel
Titanium alloy) have the advantage that in itself, i.e., larger restoring force and deformation, higher corrosion resistance, preferably higher intensity, modeling
The characteristics such as property, additionally have the advantages that small proportion, fatigue life length and such environmental effects are small, and then greatly reduce anchor pole
The limitation of anchor structure in the application, so the anchoring body of anchor pole just need not provide anchoring by cement mortar or cement mortar
Power, but achieved the goal simply by annular shape Memory Alloy member 10.Meanwhile, the control of grouting anchoring body is just converted
For to the processing of the memory effect of annular shape Memory Alloy member 10, and the processing of memory effect only need to be according to right the need for engineering
Memory Alloy member carries out certain heat-machining operation, so for site operation, its construction technology and equipment
Be simple and convenient to operate, effect it is safe and reliable.As can be seen here, the anchor rod anchored structure of memorial alloy not only increases the resistance to plucking of structure
Power, durability and the scope of application, and it is also manifested by its simple, reliable construction technology, investment and the low advantage of cost expense.Cause
This, relatively conventional construction technology, the present invention has the loss of prestress of construction low, and resistance to plucking (anchoring) power is high, and cost is low
The advantages of, structure redesign is carried out using memorial alloy, performance, applicability of anchor rod anchored structure etc. is obtained very big change
Kind and raising.
Designing technique personnel in this area described above should be understood the main thought of the present invention, although the present invention is to one
What the anchor rod anchored structure of expansion type alloy of simple circle (ring) tee section was described, but the scope of application of the present invention is not only
It is limited only to this.For example, the alloy components 1 of large-diameter annual can be designed as flaabellum shape by those skilled in the art completely
Or the other forms such as tooth shape, the continuous anchor rod anchored structure of expansion type alloy can be expanded to again, can also be designed
As alloy anchorage cable anchoring structure etc., it is specifically described with reference to the present embodiment accompanying drawing just for the sake of clear explanation originally
The thinking of invention, this area designing technique personnel should be understood its marrow, as long as carrying out anchor structure design using memorial alloy
Thought be protection scope of the present invention.
Claims (7)
1. a kind of supporting construction of expansion type marmem anchor pole, including the body of rod and Rock And Soil, it is characterized in that：In the bar
The end of body has suspended deck structure, and annular shape Memory Alloy member is set in the end of the body of rod, is combined the two by cushion cap
Connect and compose and prebored hole is provided with integral marmem anchor pole, Rock And Soil, marmem anchor pole is plugged in preboring
In hole, the marmem anchor pole for the Shape Memory Alloy member composition that shape memory is replied occurs completely again by constructing
Thing, fastener, supporting plate and pedestal locking.
2. a kind of supporting construction of expansion type marmem anchor pole according to claim 1, it is characterized in that：The rock
The aperture of the prebored hole of the soil body is slightly larger than the size of the body of rod, the depth of prebored hole and the length of anchor pole is close, and prebored hole is inclined
Angle is 10 °~35 °.
3. a kind of supporting construction of expansion type marmem anchor pole according to claim 1, it is characterized in that：Described
Centralizer is set in the prebored hole of Rock And Soil.
4. a kind of anchoring construction technique of the expansion type marmem anchor pole described in usage right requirement 1, it is characterized in that：Bag
Include following steps：
(1) preparation of annular shape Memory Alloy member：Machining operation is used under alloy mother phase state, by shape memory
Alloy blank is shaped as the initial alloy component of annular, and the internal diameter of initial alloy component cylinder is identical with external diameter of rod body, so
Shape memory processing is carried out to it afterwards, under the temperature environment more much lower than phase change transition temperature, in martensitic state
Alloy components carry out mechanical compress deformation, are finally processed into as annular shape Memory Alloy member；
(2) formation of marmem anchor pole：Less than under phase change transition temperature, annular shape Memory Alloy member is enclosed on
The end of the body of rod, makes both be connected into one by the cushion cap of rod end, that is, constitutes marmem anchor pole；
(3) formation of the anchor rod anchored system of cylindrical type alloy：Preservative treatment is carried out to marmem anchor pole, then again will
Marmem anchor pole is promptly placed in the prebored hole of Rock And Soil, has obtained the anchor rod anchored system of cylindrical type alloy；
(4) formation of expansion type alloy anchoring-bolt system：By the temperature at where rock-soil layer, annular shape Memory Alloy member by
Gradually it is increased to after phase change transition temperature, alloy material automatically will carry out the transformation of martensite reverse transformation in itself and occur one way shape
Shape remembers recovery effect, reduces its height, and overall diameter expands, and is finally converted into the alloy components (1) for large-diameter annual,
As expansion type alloy anchoring-bolt system；
(5) the anchor rod anchored structure of expansion type alloy is obtained：Returned when shape memory occurs completely for annular shape Memory Alloy member
After multiple, tensioning and locking are carried out to expansion type alloy anchoring-bolt system by structures, fastener, supporting plate and pedestal, expanded
The large-scale anchor rod anchored structure of alloy.
5. a kind of anchoring construction technique of expansion type marmem anchor pole according to claim 4, it is characterized in that：
Laid in the step (3) before marmem anchor pole, ensure that the temperature of annular shape Memory Alloy member is less than its phase
Become transition temperature.
6. a kind of anchoring construction technique of expansion type marmem anchor pole according to claim 5, it is characterized in that：Institute
State before marmem anchor pole is put in step (3), centralizer is set in the prebored hole of Rock And Soil.
7. a kind of anchoring construction technique of expansion type marmem anchor pole according to claim 4 or 5 or 6, it is special
Levying is：The aperture of prebored hole is close to the outside dimension of the body of rod in the Rock And Soil, and the depth of prebored hole connects with the length of anchor pole
Closely, the inclination angle of prebored hole is 10 °~35 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511029578.0A CN105484261B (en) | 2015-12-31 | 2015-12-31 | A kind of expansion type marmem anchor pole and its anchoring construction technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029578.0A CN105484261B (en) | 2015-12-31 | 2015-12-31 | A kind of expansion type marmem anchor pole and its anchoring construction technique |
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| CN105484261B true CN105484261B (en) | 2017-07-28 |
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| CN110206031B (en) * | 2019-05-08 | 2020-10-16 | 江苏科技大学 | Temperature response self-tightening anchor rod and construction method thereof |
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| JPH0665921A (en) * | 1992-08-18 | 1994-03-08 | Hitachi Building Syst Eng & Service Co Ltd | Anchor bolts |
| CN102839663B (en) * | 2012-09-02 | 2015-08-19 | 山东科技大学 | Automatic anchor device and application process thereof |
| CN105155534B (en) * | 2015-08-07 | 2016-11-30 | 兰州理工大学 | Quick-assembling recyclable frame with anchors structure and construction method |
| CN205369250U (en) * | 2015-12-31 | 2016-07-06 | 徐州工程学院 | Supporting construction of expansion type shape memory alloy stock |
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