CN108086334A - A kind of recyclable quick prestress anchorage cable and its construction method - Google Patents
A kind of recyclable quick prestress anchorage cable and its construction method Download PDFInfo
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- CN108086334A CN108086334A CN201711333384.9A CN201711333384A CN108086334A CN 108086334 A CN108086334 A CN 108086334A CN 201711333384 A CN201711333384 A CN 201711333384A CN 108086334 A CN108086334 A CN 108086334A
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- strand wires
- steel
- stress
- steel strand
- enlarged footing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention provides a kind of recyclable quick prestress anchorage cable and its construction method, anchor cable includes steel sleeve and symmetrical enlarged configuration, steel bushing bottom of the tube is equipped with nose cone, side wall is equipped with symmetrical opening, enlarged configuration includes fixed pin, fixed pulley and enlarged footing, fixed pin and enlarged footing are arranged in the opening of steel sleeve side wall, fixed pin both ends are fixedly connected with steel sleeve, enlarged footing is rotatablely connected by fixed pin and steel sleeve, fixed pulley is fixed on nose cone upper end, stress steel strand wires one end is connected with enlarged footing, and the other end passes through steel sleeve around fixed pulley；Non-stress steel strand wires one end is connected with nose cone, and the other end passes through steel sleeve.The present invention is without grouting, it can tensioning after installation is in place, supporting task terminates can complete recycling, the later stage of surrounding building is built and is not had an impact, the duration can effectively be reduced, reduce the wasting of resources, suitable for Soft Rock Area, the emergency repair engineering harsh to time requirement and gib engineering are particularly suitable for.
Description
Technical field
The invention belongs to engineering support fields, and in particular to a kind of recyclable quick prestress anchorage cable and its construction party
Method suitable for Soft Rock Area, is particularly suitable for the emergency repair engineering harsh to time requirement and gib engineering.
Technical background
China's cable bolting technology has been started from the 1970s, since the eighties, and cable bolting technology obtains widely should
With being developed so far the common approach having become in slope treatment and engineering protection.Cable bolting can be with Vierendeel girder, friction pile
Supportings means is waited to be used in combination, fundamentally improve the globality of side slope, improves the mechanical property of slope ground body, reaches improvement
Effect.
It is restricted by engineering specifications and engineering construction flow, prestress anchorage cable need to be often set in engineering construction as interim
Supporting, the anchor cable in temporary facility is typically what can not be recycled, not only needs to consume substantial amounts of steel (muscle) twisted wire, concrete etc.
Material causes significant wastage.And these anchor cables are reserved in underground and the later stage construction of surrounding building are produced a very large impact.Such as
These provisional facilities of fruit carry out supporting using recoverable prestress anchorage cable, it is removed simultaneously after the completion of gib
It recycles, expense can not only be greatly reduced, but also anchor cable can be eliminated and stay in the influence that the later stage is built in underground.Therefore research can
Recovery type prestress anchorage cable be support technology further develop new direction, new trend.Patent (application number：
201210290137.6) disclose recyclable post-tensioning hair prestressed anchor cable pile and its construction method, anchor cable one end pass through safety pin
It is connected with drill bit, but the method can only recycle anchor cable, and safety pin and drill bit are still remained in pile body, still cause to waste, right
Later stage construction still remains influence.
In addition, the technological process of cable bolting technology is:Drilling, making, installation, slip casting, tensioning fixation, sealing off and covering anchorage.Wherein
In this link of slip casting, it is necessary to which bodies is waited, which to reach the 80% of design strength, to carry out tensioning fixation to anchor cable.This link
15 days or so are needed, in the meantime therefore entire cable bolting engineering can all be stagnated, the strong influence duration.For when
Between require in the harnessing projects of some extra-urgent emergency repairs, common anchor cable because duration reason becomes no longer to be applicable in,
Economic, safe, ripe cable bolting technology has to be rejected in scheme comparison, so as to take it is with high investment, excessive risk its
His scheme, has a greatly reduced quality in economy and security.Long slip casting curing time is that another restriction cable bolting is further
The factor of development.
Therefore, the drawbacks of developing the prestress anchorage cable of quick recoverable, overcoming common anchor cable accelerates to promote prestressed anchor
Rope technology, the cost performance for improving cable bolting and the trend for responding National Environmental friendly social development.
The content of the invention
Existing in the prior art to solve the problems, such as, the present invention provides a kind of recyclable quick prestress anchorage cable.The present invention
For precast construction, without grouting, after anchor cable structure installation is in place can tensioning, can recycle completely again after supporting task sharp
With building and do not have an impact to later stage of surrounding building, can effectively reduce the duration, reduce the wasting of resources, suitable for soft rock
Area is particularly suitable for the emergency repair engineering harsh to time requirement and gib engineering.
The technical solution adopted by the present invention is：
A kind of recyclable quick prestress anchorage cable, including steel sleeve, non-stress steel strand wires and several are symmetrical
Enlarged configuration, steel bushing bottom of the tube are equipped with nose cone, and side wall is equipped with several symmetrical openings, and (enlarged configuration and opening are one by one
It is corresponding), upper end is equipped with cover, and cover is equipped with stress steel strand wires preformed hole and non-stress steel strand wires preformed hole, described to expand knot
Structure includes fixed pin, fixed pulley, enlarged footing and stress steel strand wires, and fixed pin and enlarged footing are arranged in the opening of steel sleeve side wall,
Fixed pin both ends are fixedly connected with steel sleeve, and the enlarged footing is rotatablely connected by fixed pin and steel sleeve, and the fixed pulley is consolidated
Nose cone upper end is scheduled on, stress steel strand wires one end is connected with enlarged footing upper end, and the other end passes through steel sleeve cover around fixed pulley
On stress steel strand wires preformed hole, the enlarged footing be placed under the pulling force effect for being not affected by steel strand wires in steel sleeve (during construction,
Anchor cable can be made to enter in anchor hole), enlarged footing is under the pulling force effect for being subject to steel strand wires around fixed pin in steel sleeve side wall
It rotates and opens in opening；Described non-stress steel strand wires one end is connected with nose cone upper end, and the other end is passed through in steel sleeve cover
Non-stress steel strand wires preformed hole.
The structure of the enlarged footing is circular cone, pyramid, cylinder, prism, round platform and a single-curved surface pyramid (side of pyramid
Change curved surface into) one or more.
The most inner top side of the stress steel strand wires and enlarged footing connects.
It is preferred that the structure of enlarged footing is single-curved surface triangular pyramid, the surface filling of the single-curved surface triangular pyramid to steel sleeve side wall
Opening in (curved surface is engaged with the opening of steel sleeve side wall, not under the pulling force effect for being subject to steel strand wires, curved surface pyramid
The side of curved surface and steel sleeve forms the side of cylinder), such enlarged footing upon deployment, is got over apart from firm casing in the horizontal direction
The structure of nearly enlarged footing is thicker, meets the stress characteristic of enlarged footing, the structure and Rock And Soil apart from the more remote enlarged footing of firm casing
Contact area is smaller to be also beneficial to widened opening.
The enlarged footing and the maximum angle of stress steel strand wires junction rotation be (enlarged footing and stress steel strand wires junction
Maximum opening angle) it is no more than 120 °.When opening completely, fixed pin shaft center, enlarged footing and stress steel strand wires tie point are slided calmly
The outermost contact point three of wheel and stress steel strand wires is on same straight line.Further, the enlarged footing and stress steel
The maximum angle of twisted wire junction rotation is 120 °, and it is more secured to be so conducive to anchor cable fixation.
It is preferred that non-stress steel strand wires preformed hole is located at the center of steel sleeve cover, stress steel strand wires preformed hole is located at fixed pulley
Surface (stress steel strand wires preformed hole is distributed in steel sleeve cover according to the arrangement of fixed pulley).
The fixed pulley is replaced by rolling bearing.
The present invention also provides a kind of construction methods of recyclable quick prestress anchorage cable, include the following steps：
(a):Positioning：Drilling, and reaming is carried out at the position of enlarged footing in steel sleeve is installed, steel pipe is against steel sleeve
In the cover of upper end, aid in steel sleeve being put into drilling using steel pipe, slow tensioning is carried out to stress steel strand wires, due to carrying out
Appropriate reaming and steel pipe generated reaction force make enlarged footing be subject to the pulling force of stress steel strand wires around fixed pin in steel sleeve side wall
Opening in smoothly open, in umbrella-shaped structure, start to play anchorage effect；
(b):Tensioning and locking：Head is will be enlarged by open completely and start stress, then withdraw from steel pipe and as requested to by
Power steel strand wires carry out prestressed tensioning, and anchor cable is locked with anchor head；
(c)：Recycling：After the completion of gib, anchor head is removed, the prestressing force of stress steel strand wires is released, and is pulled non-
Stress steel strand wires, enlarged footing lose pulling force effect, and being acted on reverse rotation by Rock And Soil returns to initial position, the smooth quilt of anchor cable
It pulls out and recycles.
Above-mentioned steel pipe is that steel sleeve is applied before stretching stress steel strand wires and opening enlarged footing for the effect of steel sleeve
Pressure, prevention steel sleeve are pulled out to come before not opening.The present invention operation principle be：Prefabricated anchor cable structure is installed just in anchor hole
Behind position, by tensioning around fixed pulley or the stress steel strand wires of rotation axis, enlarged footing is made to rotate opening around fixed pin, enlarged footing squeezes
Rock And Soil is pressed, has the function that anchoring；After the completion of supporting task, the prestressing force of stress steel strand wires is unloaded, non-stress steel is pulled to twist
Line, enlarged footing are reversely rotated by the power of Rock And Soil to steel bushing, so as to fulfill the recycling of anchor cable structure.
Compared with prior art, beneficial effects of the present invention are：
1st, a kind of recyclable quick prestress anchorage cable proposed by the present invention, terminates, installation is complete for anchor cable structure in drilling
After can to anchor cable carry out tensioning fixation (enlarged footing during tensioning because opening at this time), play support action immediately, shorten
Duration of a project.The working time of the invention for reducing slip casting and slip casting maintenance compared with traditional anchor cable, script is needed 20
The duration of it or so shortens to 3-4 days, improves the progress of engineering, is particularly suitable in the emergency repair harsh to time requirement
Emergency sustenance engineering.
2nd, a kind of recyclable quick prestress anchorage cable proposed by the present invention, by unloading after gib task is completed
The prestressing force of stress steel strand wires is carried, makes enlarged footing return, entire anchor cable structure is pulled out using non-stress steel strand wires and is recycled, it can be with
Recycling, the waste of resource is reduced compared with traditional anchor cable, eliminates and is trapped in due to gib anchor cable can not recycle
Underground, the influence to ambient enviroment and subsequent construction.
3rd, after installation is complete, enlarged footing opens the present invention in umbrella-shaped structure, it is proposed that a kind of new ground anchorage load
Pass through mechanism, preferably transferred the self-stability energy of Rock And Soil, improved the stability of supporting and the security of engineering.
4th, the end of anchor cable of the present invention uses Prefabrication, and quality safety is reliable, and construction method is simple and fast.
Description of the drawings
Fig. 1 is the structure diagram when present invention does not work
Fig. 2 is the structure diagram when present invention plays a role
Structure diagram when Fig. 3 opens for enlarged footing
Fig. 4 is the schematic view of the mounting position of enlarged footing, fixed pulley in steel sleeve
Fig. 5 is steel sleeve top and anchor cable hole position view
Fig. 6 is enlarged footing and fixed pin connection diagram
Fig. 7 is the stereogram of enlarged footing and fixed pin
It is marked in figure：1st, anchor hole, 2, steel sleeve, 3, stress steel strand wires, 4 non-stress steel strand wires 5, fixed pin, 6, fixed pulley,
7 enlarged footings, 8, stress steel strand wires preformed hole 9, expansion chamber 10, non-stress steel strand wires preformed hole
Specific embodiment
Embodiment 1
As shown in figs. 1-7, a kind of recyclable quick prestress anchorage cable, if including steel sleeve 2, non-stress steel strand wires 4 and
Dry symmetrical enlarged configuration, 2 bottom of steel sleeve are equipped with nose cone, and side wall is equipped with several symmetrical openings and (expands
Big structure and opening correspond), upper end is equipped with cover, and cover is equipped with stress steel strand wires preformed hole 8 and non-stress steel strand wires
Preformed hole 10, the enlarged configuration include fixed pin 5, fixed pulley 6, enlarged footing 7 and stress steel strand wires 3, fixed pin 5 and enlarged footing
7 are arranged in the opening of 2 side wall of steel sleeve, and 5 both ends of fixed pin are fixedly connected with steel sleeve 2, and the enlarged footing 7 passes through fixed pin 5
It is rotatablely connected with steel sleeve 2, the fixed pulley 6 is fixed on nose cone upper end, 3 one end of stress steel strand wires and the inside of enlarged footing 7
Upper end connects, and around fixed pulley 6 through the stress steel strand wires preformed hole 8 in 2 cover of steel sleeve, the enlarged footing 7 exists the other end
It is not affected by under the pulling force effect of steel strand wires 3 and is placed in steel sleeve 2, enlarged footing 7 is in the case where being subject to the pulling force effect of steel strand wires 3 around solid
Rationed marketing 5 rotates opening in the opening of 2 side wall of steel sleeve；Described 4 one end of non-stress steel strand wires is connected with nose cone upper end, another
It holds through the non-stress steel strand wires preformed hole 10 in 2 cover of steel sleeve.The structure of the enlarged footing 7 be single-curved surface triangular pyramid, institute
The surface filling of single-curved surface triangular pyramid is stated into the opening of 2 side wall of steel sleeve.Enlarged footing 7 and the rotation of 3 junction of stress steel strand wires
Maximum angle be 120 °.Non-stress steel strand wires preformed hole 10 is located at the center of 2 cover of steel sleeve, stress steel strand wires preformed hole 8
Directly over fixed pulley 6.
A kind of construction method of recyclable quick prestress anchorage cable of the present embodiment, includes the following steps：
(a):Positioning：Drilling, and reaming is carried out at the position of enlarged footing 7 in steel sleeve 2 is installed, being aided in using steel pipe will
Steel sleeve 2 is put into drilling 1, and slow tensioning is carried out to stress steel strand wires 3, due to carried out appropriate reaming and steel pipe generate it is anti-
The pulling force that power makes enlarged footing 7 be subject to stress steel strand wires 3 is smoothly opened around fixed pin 5 in the opening of 2 side wall of steel sleeve, in umbrella
Shape structure starts to play anchorage effect；
(b):Tensioning and locking：It will be enlarged by first 7 openings completely and form expansion chamber 9, and start stress, then withdraw from steel pipe simultaneously
To carrying out prestressed tensioning to stress steel strand wires 3, anchor cable is locked with anchor head；
(c)：Recycling：After the completion of gib, anchor head is removed, the prestressing force of stress steel strand wires 3 is released, and is pulled non-
Stress steel strand wires 4, enlarged footing 7 lose pulling force effect, and being acted on reverse rotation by Rock And Soil returns to initial position, and anchor cable is smooth
It is drawn out and recycles.
The fixed pulley 6 can also be replaced by rolling bearing.
This legend only lists the form that a steel sleeve 2 is made of four enlarged footings 7, on this basis with reference to stress
It is required that anchor cable end can also form umbrella-shaped structure with the enlarged footing 7 of two, three etc. forms expansion chamber 9, the present invention is belonged to
Scope within.
This legend only lists the structure that an enlarged footing is long taper, all to its change in shape, is not changing
It is belonged in the case of becoming its force transferring structure within scope of the invention.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention, though
So the present invention is disclosed above with preferred embodiment, however is not limited to the present invention, any person skilled in the art
Without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or are modified to
With variation equivalent embodiment, as long as be for depart from technical solution of the present invention content, technical spirit according to the invention to
Any simple modification, equivalent change and modification that upper embodiment is done, in the range of still belonging to technical solution of the present invention.
Claims (8)
1. a kind of recyclable quick prestress anchorage cable, it is characterised in that：Including steel sleeve (2), non-stress steel strand wires (4) and if
Dry symmetrical enlarged configuration, steel sleeve (2) bottom are equipped with nose cone, and side wall is equipped with several symmetrical openings,
Upper end is equipped with cover, and cover is equipped with stress steel strand wires preformed hole (8) and non-stress steel strand wires preformed hole (10), described to expand knot
Structure includes fixed pin (5), fixed pulley (6), enlarged footing (7) and stress steel strand wires (3), and fixed pin (5) and enlarged footing (7) are arranged on steel
In the opening of casing (2) side wall, fixed pin (5) both ends are fixedly connected with steel sleeve (2), and the enlarged footing (7) passes through fixed pin
(5) it is rotatablely connected with steel sleeve (2), the fixed pulley (6) is fixed on nose cone upper end, and stress steel strand wires (3) one end is with expanding
The upper end connection of head (7), the other end pass through the stress steel strand wires preformed hole (8) in steel sleeve (2) cover around fixed pulley (6),
The enlarged footing (7) is placed in steel sleeve (2) being not affected by under the pulling force effect of steel strand wires (3), and enlarged footing (7) is being subject to steel to twist
Opening is rotated in the opening of steel sleeve (2) side wall around fixed pin (5) under the pulling force effect of line (3)；The non-stress steel twists
Line (4) one end is connected with nose cone upper end, and the other end passes through the non-stress steel strand wires preformed hole (10) in steel sleeve (2) cover.
2. a kind of recyclable quick prestress anchorage cable as described in claim 1, it is characterised in that：The enlarged footing (7)
Structure is the one or more of circular cone, pyramid, cylinder, prism, round platform and single-curved surface pyramid.
3. a kind of recyclable quick prestress anchorage cable as described in claim 1, it is characterised in that：The enlarged footing (7)
Structure is single-curved surface triangular pyramid, and the surface filling of the single-curved surface triangular pyramid is into the opening of steel sleeve (2) side wall.
4. a kind of recyclable quick prestress anchorage cable as described in claim 1, it is characterised in that：Enlarged footing (7) and stress
The maximum angle of steel strand wires (3) junction rotation is no more than 120 °.
5. a kind of recyclable quick prestress anchorage cable as described in claim 1, it is characterised in that：Enlarged footing (7) and stress
The maximum angle of steel strand wires (3) junction rotation is 120 °.
6. a kind of recyclable quick prestress anchorage cable as described in claim 1, it is characterised in that：Non-stress steel strand wires are reserved
Hole (10) is located at the center of steel sleeve (2) cover, and stress steel strand wires preformed hole (8) is located at directly over fixed pulley (6).
7. such as a kind of recyclable quick prestress anchorage cable of claim 1-6 any one of them, it is characterised in that：It is described to determine cunning
Wheel (6) is replaced by rolling bearing.
It is 8. a kind of such as a kind of construction method of recyclable quick prestress anchorage cable of claim 1-6 any one of them, spy
Sign is：Include the following steps：
(a):Positioning：Drilling, and reaming is carried out at the position of enlarged footing (7) in installation steel sleeve (2), being aided in using steel pipe will
Steel sleeve (2) is put into drilling (1), and slow tensioning is carried out to stress steel strand wires (3), due to having carried out appropriate reaming and steel pipe production
Raw counter-force makes enlarged footing (7) that the pulling force of stress steel strand wires (3) is subject to surround opening of the fixed pin (5) in steel sleeve (2) side wall
In smoothly open, in umbrella-shaped structure, start to play anchorage effect；
(b):Tensioning and locking：It will be enlarged by head (7) to open completely and start stress, then withdraw from steel pipe and to stress steel strand wires
(3) prestressed tensioning is carried out, anchor cable is locked with anchor head；
(c)：Recycling：After the completion of gib, remove anchor head, the prestressing force of stress steel strand wires (3) is released, pull it is non-by
Power steel strand wires (4), enlarged footing (7) lose pulling force effect, and being acted on reverse rotation by Rock And Soil returns to initial position, and anchor cable is suitable
Profit is drawn out and recycles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711333384.9A CN108086334B (en) | 2017-12-13 | 2017-12-13 | A kind of recyclable quick prestress anchorage cable and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711333384.9A CN108086334B (en) | 2017-12-13 | 2017-12-13 | A kind of recyclable quick prestress anchorage cable and its construction method |
Publications (2)
| Publication Number | Publication Date |
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| CN108086334A true CN108086334A (en) | 2018-05-29 |
| CN108086334B CN108086334B (en) | 2019-12-03 |
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| CN201711333384.9A Active CN108086334B (en) | 2017-12-13 | 2017-12-13 | A kind of recyclable quick prestress anchorage cable and its construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577856A (en) * | 2018-12-10 | 2019-04-05 | 山河智能装备股份有限公司 | A kind of anchoring power head assembly and anchoring power head mechanism |
| CN109944241A (en) * | 2019-04-04 | 2019-06-28 | 长江勘测规划设计研究有限责任公司 | The reversed pulling device in anchor cable hole bottom and anchor cable installation method |
| CN110410124A (en) * | 2019-08-21 | 2019-11-05 | 周艳君 | Anchoring process and anchorage element device can be recycled in one kind falling leaf formula |
| CN113197015A (en) * | 2021-03-23 | 2021-08-03 | 张金晶 | Self-adaptive seedling protection device for desert zone |
| CN113235591A (en) * | 2021-05-25 | 2021-08-10 | 成都四海岩土工程有限公司 | Expansion shell type anchor cable and construction method thereof |
| CN114136255A (en) * | 2021-11-30 | 2022-03-04 | 重庆大学 | Measurement point self-locking structure and multipoint displacement meter with same |
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| KR20140056427A (en) * | 2012-10-25 | 2014-05-12 | 기언관 | An earth-anchor and construction method of the same |
| CN105220706A (en) * | 2015-10-20 | 2016-01-06 | 中国科学院武汉岩土力学研究所 | Enlarged footing prestressed anchor blower foundation system and construction method thereof |
| CN105714823A (en) * | 2016-03-22 | 2016-06-29 | 兰州理工大学 | Recoverable quick-anchoring and body-expanding type anchor rope and construction method |
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| CN101307590A (en) * | 2008-07-03 | 2008-11-19 | 孙玥 | Anchorage cable anchoring construction method |
| KR20140056427A (en) * | 2012-10-25 | 2014-05-12 | 기언관 | An earth-anchor and construction method of the same |
| CN105220706A (en) * | 2015-10-20 | 2016-01-06 | 中国科学院武汉岩土力学研究所 | Enlarged footing prestressed anchor blower foundation system and construction method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577856A (en) * | 2018-12-10 | 2019-04-05 | 山河智能装备股份有限公司 | A kind of anchoring power head assembly and anchoring power head mechanism |
| CN109577856B (en) * | 2018-12-10 | 2020-08-07 | 山河智能装备股份有限公司 | Anchoring power head assembly and anchoring power head mechanism |
| CN109944241A (en) * | 2019-04-04 | 2019-06-28 | 长江勘测规划设计研究有限责任公司 | The reversed pulling device in anchor cable hole bottom and anchor cable installation method |
| CN109944241B (en) * | 2019-04-04 | 2023-11-10 | 长江勘测规划设计研究有限责任公司 | Anchor cable hole bottom reverse traction device and anchor cable installation method |
| CN110410124A (en) * | 2019-08-21 | 2019-11-05 | 周艳君 | Anchoring process and anchorage element device can be recycled in one kind falling leaf formula |
| CN113197015A (en) * | 2021-03-23 | 2021-08-03 | 张金晶 | Self-adaptive seedling protection device for desert zone |
| CN113197015B (en) * | 2021-03-23 | 2023-01-17 | 陶泓羽 | Self-adaptive seedling protection device for desert zone |
| CN113235591A (en) * | 2021-05-25 | 2021-08-10 | 成都四海岩土工程有限公司 | Expansion shell type anchor cable and construction method thereof |
| CN114136255A (en) * | 2021-11-30 | 2022-03-04 | 重庆大学 | Measurement point self-locking structure and multipoint displacement meter with same |
| CN114136255B (en) * | 2021-11-30 | 2024-02-02 | 重庆大学 | Measuring point self-locking structure and multi-point displacement meter with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108086334B (en) | 2019-12-03 |
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