CN106320186B - A kind of skewback embedded anchor bar positioning system and construction method - Google Patents
A kind of skewback embedded anchor bar positioning system and construction method Download PDFInfo
- Publication number
- CN106320186B CN106320186B CN201610905896.7A CN201610905896A CN106320186B CN 106320186 B CN106320186 B CN 106320186B CN 201610905896 A CN201610905896 A CN 201610905896A CN 106320186 B CN106320186 B CN 106320186B
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- anchor pole
- skewback
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- anchor
- case
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses the construction methods of a kind of skewback embedded anchor bar positioning system and the application system, it is related to field of bridge construction, the system includes locating support, anchor pole positioning case, adjuster and jack, and skewback embedded anchor bar positioning construction method project progress of the present invention is fast, working procedure is simple, construction safety, precision are high；Using skewback embedded anchor bar positioning system cost input of the present invention is small, consumable quantity is few, installation is quick, does not need again the single adjustment for carrying out anchor pole, it can be achieved that the inbuilt rapid construction of complex environment lower bolt.
Description
Technical field
The present invention relates to field of bridge construction, and in particular to a kind of skewback embedded anchor bar positioning system and construction method.
Background technique
With the development of modern bridge construction technology, bridge bearing load is constantly aggravated, and therefore, it is necessary to design Special complex
Structure meet load bearing demand, and then it is bigger to cause the difficulty of bridge construction more to be come, and required precision is higher and higher.Construction at present
The rigid concrete combination section of long-span arch bridge, when anchoring big component, the time that positioning anchor pole needs is long and precision is difficult to control
System.How quick, the high-precision toughened internal stress construction for completing anchor pole positioning becomes the coke of current science of bridge building personnel concern
Point.
Common temporary facility of the locating support as bridge construction, main function be as in work progress to main body steel
The makeshift device of support, the positioning of structure, so as to main structure of constructing under conditions of falsework supports.In Soil Anchor Design number
In the case that amount is few, required precision is not high, generally constructed using shape steel bracket, locating slot steel as locating support,
And the positioning of anchor pole is adjusted completion by construction personnel one by one, but, arrangement complexity more for those anchor pole quantity, required precision are very
High engineering, if being on the one hand unsatisfactory for the high requirement of anchor pole positioning accuracy using general fashioned iron locating support, on the other hand
Work efficiency is lower, and adjustment workload is excessive.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of skewback embedded anchor bar positioning systems
And construction method, it can the fast and accurately batch completion anchor pole accurate positioning work under complex environment.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of skewback embedded anchor bar positioning system, is set up on bridge skewback 4, including jack, further includes:
Locating support 1 is fixed to each other for bracket bottom plate 12, at least four bracket upright posts 11 and several connecting brackets 13
The space truss of composition is connected, the bracket bottom plate 12 is set in bridge skewback 4, the bracket upright post 11 and the bridge arch
The theoretical arch 6 of seat 4 is parallel, and 11 bottom end of bracket upright post is fixed on the bracket bottom plate 12, the bracket upright post 11
Top is equipped with connecting fulcrum 14；
Anchor pole positioning case 2 is fixed with the cuboid framework structure of steel plate for number faces, by the connecting fulcrum 14 and
The locating support 1 is fixedly connected, and the anchor pole positioning case 2 includes two positioning plates 21 arranged in parallel, the positioning
Several anchor pole hole locations 22 corresponding with 5 predeterminated position of anchor pole are provided on plate 21.
Based on the above technical solution, all connecting fulcrums 14 are located at the same reason perpendicular to the bridge skewback 4
In plane by arch 6.
Based on the above technical solution, steel plate of the positioning plate 21 by muti-piece with anchor pole hole location 22 welds shape
At the positioning plate 21 is located in the plane determined by the connecting fulcrum 14.
Based on the above technical solution, the anchor pole positioning case 2 is detachably connected with the locating support 1.
Based on the above technical solution, two pieces are additionally provided between the positioning plate 21 of the anchor pole positioning case 2 to set relatively
The steel plate set is fixedly connected between the positioning plate 21 and the steel plate by shape steel bracket 24.
Based on the above technical solution, it is additionally provided in the bracket upright post 11 of 14 side of connecting fulcrum for fixing
The limiting device of the anchor pole positioning case 2.
The present invention also provides a kind of construction methods using above-mentioned skewback embedded anchor bar positioning system, and this method includes following
Step:
Step 1, manufacture has the anchor pole positioning case 2 of several predeterminated position anchor pole hole locations 22；
Step 2, install locating support 1: embedded bracket bottom plate 12, mounting bracket column 11 are adjusted to all bracket upright posts
11 is parallel with the theoretical arch 6 of the bridge skewback 4, installs connecting fulcrum 14 on each 11 top of bracket upright post；
Step 3, install anchor pole positioning case 2: adjustment connecting fulcrum 14 is to all connecting fulcrums 14 perpendicular to bridge skewback 4
In the same plane of theoretical arch 6, positioning plate 21 is connected with connecting fulcrum 14.
Based on the above technical solution, further comprising the steps of after the step 3: installation anchor pole 5: by anchor pole 5 by
It is after one passes through the anchor pole hole location 22 of positioning plate 21, anchor pole 5 is fixed；Remove anchor pole positioning case 2.
Based on the above technical solution, further comprising the steps of between the step 2 and step 3: in connecting fulcrum
Installation is for fixing 2 limiting device of anchor pole positioning case in the bracket upright post 11 of 14 sides.
Based on the above technical solution, further comprising the steps of between the step 3 and step 4: anchor pole is positioned
The anchor pole hole location 22 of case 2 checked, is calculated after anchor pole positioning case 2 needs mobile data, by anchor pole positioning case 2 adjust to
Design position.
Compared with the prior art, the advantages of the present invention are as follows:
(1) skewback embedded anchor bar positioning system of the invention can make anchor pole directly position completion by location hole, not need
The single adjustment for carrying out anchor pole is, it can be achieved that quick, accurate, the batch of complex environment lower bolt position again.
(2) skewback embedded anchor bar positioning system of the invention, due to being made of multiple components, respectively for dismountable structure
It is integral using welding between component, facilitate the dismounting of the spelling, positioning anchor case of positioning system, so that cost input is small, consumptive material
Amount less, recycling number it is high and recyclable.
(3) skewback embedded anchor bar positioning construction method of the invention, anchor pole positioning step are constructed in positioning system, not by
Outside support deformation influence, compared with existing form of construction work, the present invention have difficulty of construction it is small, it is easy to operate, easy for construction,
The advantages of construction precision height, short construction period, more can guarantee that anchor pole positions construction quality.
Detailed description of the invention
Fig. 1 is the schematic view of facade structure of skewback embedded anchor bar positioning system in the embodiment of the present invention；
Fig. 2 is positioning case part-structure top view in the embodiment of the present invention；
Fig. 3 is positioning case part-structure main view in the embodiment of the present invention；
Fig. 4 is the floor map of positioning plate in the embodiment of the present invention.
In figure: 1- locating support, 2- anchor pole positioning case, 3- bridge column, 4- bridge skewback, 5- anchor pole, 6- theory arch axis
Line, 11- bracket upright post, 12- bracket bottom plate, 13- connecting bracket, 14- connecting fulcrum, 21- positioning plate, 22- anchor pole hole location, 23-
Plug hole, 24- shape steel bracket.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of skewback embedded anchor bar positioning system being set up on bridge skewback 4
System, comprising:
Locating support 1 is fixed to each other for bracket bottom plate 12, at least four bracket upright posts 11 and several connecting brackets 13
The space truss of composition is connected, bracket bottom plate 12 is set in bridge skewback 4, and bracket upright post 11 and the theoretical of bridge skewback 4 encircle
Axis 6 is parallel, and 11 bottom end of bracket upright post is fixed on bracket bottom plate 12, and 11 top of bracket upright post is equipped with connecting fulcrum 14；
Anchor pole positioning case 2 is fixedly connected by connecting fulcrum 14 with locating support 1, and anchor pole positioning case 2 includes two mutual
Positioning plate 21 disposed in parallel is provided with several anchor pole hole locations 22 corresponding with anchor pole predeterminated position on positioning plate 21.
Mountable adjuster, including hole location check smart component and jack, and hole location inspection essence component is for checking anchor pole
Can whether anchor pole hole location 22 correspond and meet positioning accuracy demand in about 2 positioning plate 21 of positioning case, due to anchor pole
Positioning accuracy is mainly completed by positioning case, so the location error of anchor pole hole location 22 need to control in ± 1mm；Jack for pair
The space coordinate of anchor pole positioning case 2 is finely adjusted, and keeps the positioning of anchor pole positioning case 2 more accurate.
Jack, for the shipment of the objects such as locating support 1, anchor pole 5, the adjustment etc. of direction in space.
Anchor pole positioning case 2 can be used the removablies such as supporting point or welding with locating support 1 and be fixedly connected, this makes fixed
The spelling of position system, the dismounting of anchor pole positioning case 2 are more convenient, while also simplifying 5 positioning operation of anchor pole.
Connecting fulcrum 14 can be set in the same plane perpendicular to the theoretical arch 6 of bridge skewback 4, convenient for fixed anchor
The spatial position of bar positioning case 2.The absolute altitude of connecting fulcrum 14 is considered as the self weight of locating support 1, the self weight of anchor pole positioning case 2, anchor pole 5
To the degree of disturbing of construction bracket, displacement after self weight and concreting.
Positioning plate 21 can be set in the plane determined by connecting fulcrum 14, thus make positioning plate 21 perpendicular to bridge
The theoretical arch 6 of skewback 4, this setup convert the position adjustment of anchor pole positioning case 2 during installation by space allocation
For plane adjustment, 2 positioning operation of anchor pole positioning case is simplified.
Bracket upright post 11 is made of fashioned iron, and connecting bracket 13 is made of angle steel, specifically optional fashioned iron H50, I20 and angle
Steel ∠ 75 × 75 × 6 etc. carry out assembly and are made, and material source is extensive, and splicing process is simple.
The building block structure of anchor pole positioning case 2 is as shown in Figure 2 and Figure 3 in the present invention, and the length of steel plate is fixed with for number face
Cube frame structure, top and bottom are positioning plate 21, can be equipped with two blocks of steel plates being oppositely arranged between two pieces of positioning plates 21, steel plate is thick
Spending is 15-25mm, vacant in other faces, is fixedly connected, is welded by shape steel bracket 24 between 2 inside of anchor pole positioning case and each panel
It connects to form truss structure.
A kind of 21 structure of positioning plate in the present invention is as shown in figure 4, positioning plate 21 is had the steel plate of anchor pole hole location 22 by muti-piece
Welding is made, and several anchor pole hole locations 22 corresponding with anchor pole predeterminated position are provided on steel plate, define pouring hole between steel plate
23.The aperture of anchor pole hole location 22 is slightly larger than used 5 cross-sectional diameter of anchor pole, and plug hole 23 is that concreting and vibrating is applied
The associated catheter in working hour and the entrance of equipment.When construction, the anchor pole hole location 22 that anchor pole 5 passes through on positioning plate 21 fixes it with respect to position
Set, thus construction personnel by the spatial position of fixing anchor bar positioning case 2, can be accurately positioned each anchor pole 5 spatial position and
The accurate installation of anchor pole 5 is rapidly completed in relative position.
Limiting device can be also equipped on locating support 1, limiting device is fixedly connected on the bracket upright post on 14 side of connecting fulcrum
On 11, it vertical or horizontal can be arranged, shape steel bracket can be used and be made, be formed bigger compared with anchor pole 2 design sizes of positioning case used
Located space.Using limiting device, on the one hand can accurately be adjusted by movement of the anchor pole positioning case 2 on limiting device its
On the other hand relative position on locating support 1 may make and not be subjected to displacement in 2 fixation procedure of anchor pole positioning case, to make anchor
The positioning of bar positioning case 2 is more accurate.
The installation of skewback embedded anchor bar positioning system of the invention and construction method are as follows:
Step 1, manufacture has the anchor pole positioning case 2 of several predeterminated position anchor pole hole locations 22；
Step 2, install locating support 1: embedded bracket bottom plate 12, mounting bracket column 11 are adjusted to all bracket upright posts
11 is parallel with the theoretical arch 6 of the bridge skewback 4, installs connecting fulcrum 14 on each 11 top of bracket upright post；
Step 3, install anchor pole positioning case 2: adjustment connecting fulcrum 14 is to all connecting fulcrums 14 perpendicular to bridge skewback 4
In the same plane of theoretical arch 6, positioning plate 21 is connected with connecting fulcrum 14；
Part of step can advanced optimize:
In step 1, since 1 required precision of locating support is not high, it can be fabricated by processing factory according to design drawing
It at single purlin piece, then transports to scene and is assembled, then carry out tower crane lifting installation, it is convenient, fast and be able to satisfy construction precision
It is required that；And 2 required precision of anchor pole positioning case is high, 22 error of anchor pole hole location on positioning plate 21 must be within 1mm, therefore
It must be fabricated in factory using numerically-controlled machine tool, consider that transportation problem, anchor pole positioning case 2 can only be carried out using piecemeal
Manufacture, then transports to scene and is assembled, and after the completion of spelling, carries out overall structure size to anchor pole positioning case 2 and checks.
After the completion of step 1, the bracket bottom plate 12 being embedded in skewback 4 of having constructed can be cleared up, and according in bridge
The axis in length and breadth of heart line and arch rib calculates the segment arch rib head extreme coordinates position, then further according to the structure ruler of locating support 1
Degree calculates coordinate position, the absolute altitude of built-in fitting, accurately adjusts absolute altitude with the method for the measurement of the level.
Also adjuster can be completed the process before starting formal construction, hole location checks smart component etc.；Simultaneously at the construction field (site)
The good jack of installation settings, jack and other auxiliary devices.
In step 2, the plan-position of embedded bracket bottom plate 12 can be checked in advance before locating support 1 is installed, guarantee its with
The theoretical arch 6 of bridge skewback 4 is vertical.Locating support 1 can carry out inspection adjustment to locating support 1 again after being installed,
The volumetric position error of locating support 1 is controlled in ± 1cm.
Can follow the steps below after above-mentioned steps 2: installation is for solid on the locating support 1 of 14 side of connecting fulcrum
Determine the limiting device of anchor pole positioning case 2.Range encircled by limiting device should be more slightly larger than 2 design size of anchor pole positioning case, protects
Card anchor pole positioning case 2 can be placed within the scope of limiting device, while have certain space that can be adjusted.
Later before step 3 can also the suspension centre to anchor pole positioning case 2 carry out check and set according to the inclination angle of anchor pole positioning case 2
Set wirerope；Or concentric, 21 flatness of positioning plate and positioning branch to structure size, the front and back anchor pole hole location 22 of anchor pole positioning case 2
The face etc. of 1 fulcrum of frame is checked, it is ensured that it meets design requirement.
Connecting fulcrum 14 is arranged in the same plane perpendicular to the theoretical arch 6 of bridge skewback 4 step 3, so that after
The position of phase anchor pole positioning case 2 only needs to adjust in this face, facilitates subsequent operation, also improves construction precision.
After lifting by crane anchor pole positioning case 2 in step 3, the adjustment in direction can be carried out in the sky, is then placed within locating support 1
Connecting fulcrum 14 on, and connecting fulcrum 14 determine plane in abut against on limiting device, so that it is guaranteed that positioning plate 21 adjust
It is determined in plane to connecting fulcrum 14.
It after above-mentioned steps 3, can also follow the steps below: the anchor pole hole location 22 of anchor pole positioning case 2 is checked, calculate
Then the data that anchor pole positioning case 2 needs planar to move out are adjusted the position of anchor pole positioning case 2.
This step may be repeated in general construction, until anchor pole positioning case position meets design requirement, mileage, absolute altitude,
Offset distance is all satisfied error within ± 2mm.
When being provided with limiting device, the step of adjustment anchor pole positioning case position can be replaced by adjusting the position of limiting device
Suddenly, make adjustment work easier to be accurate.
By the step, 2 position of anchor pole positioning case can be further corrected, improves the pre-buried positioning accuracy of anchor pole.
It can be followed the steps below after above-mentioned steps 2: anchor pole 5 installation anchor pole 5: being passed through to the anchor pole of positioning plate 21 one by one
It is after hole location 22, anchor pole 5 is fixed；Remove anchor pole positioning case 2.
In this step, installation anchor pole 5 it is general using tower crane cooperate it is artificial by the way of carry out, should be noted to the length of leakage into
The accurate control of row, and inspection repetition measurement is carried out to the anchor pole 5 in installation process.It, can specification to anchor pole 5, material after anchor pole 5 is marched into the arena
Matter, length, diameter, protection situation are checked, and are effectively protected silk is first-class, avoid being destroyed at the construction field (site)；
Backing plate, nut, spring ring etc. should be installed according to design requirement when anchor pole 5 is installed, and accurately control the extension of anchor pole 5.And
Inspection is measured to the endpoint of anchor pole；When lifting anchor pole 5, soft suspender belt can be used and lifted, prevents damage anchor pole protection.
After completing the installation positioning work of anchor pole 5, concrete pouring construction can be carried out, by positioning in anchor pole positioning case 2
The plug hole 23 of plate 21 carries out concreting.Since other bar types are more, design is complicated, also closeer in work progress
Collection is reduced mutually dry during the installation process using that can optimize, adjust to reinforcing bar used of constructing before concrete pouring construction
It disturbs, the workload that the scene of reduction is cut.
Since anchor pole positioning case 2 in skewback embedded anchor bar positioning system of the present invention and locating support 1 are using supporting point, welding
Equal removablies are fixed, and anchor pole positioning case 2 is also to be welded by positioning plate 21, steel plate and shape steel bracket 24, can lead to
It crosses step 5 and anchor pole positioning case 2 is removed to recycling from locating support 1, reduce consumable quantity, reduce costs.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of skewback embedded anchor bar positioning system is set up on bridge skewback (4), including jack, which is characterized in that also wrap
It includes:
Locating support (1) is bracket bottom plate (12), at least four bracket upright posts (11) and several connecting brackets (13) are mutual
The space truss being composed of a fixed connection, the bracket bottom plate (12) are set in bridge skewback (4), the bracket upright post (11) with
In parallel, bracket upright post (11) bottom end is fixed on the bracket bottom plate (12) to the theoretical arch (6) of the bridge skewback (4)
On, bracket upright post (11) top is equipped with connecting fulcrum (14)；
Anchor pole positioning case (2) is fixed with the cuboid framework structure of steel plate for number faces, by the connecting fulcrum (14) and
The locating support (1) is fixedly connected, and the anchor pole positioning case (2) includes two positioning plates (21) arranged in parallel, institute
It states and is provided with several anchor pole hole locations (22) corresponding with anchor pole (5) predeterminated position on positioning plate (21).
2. skewback embedded anchor bar positioning system as described in claim 1, it is characterised in that: all connecting fulcrums (14) are located at same
One perpendicular in the plane of the theoretical arch (6) of the bridge skewback (4).
3. skewback embedded anchor bar positioning system as described in claim 1, it is characterised in that: the positioning plate (21) is by muti-piece band
There is the steel plate of anchor pole hole location (22) to weld to be formed, the positioning plate (21) is located at the plane determined by the connecting fulcrum (14)
On.
4. skewback embedded anchor bar positioning system as described in claim 1, it is characterised in that: the anchor pole positioning case (2) and institute
Locating support (1) is stated to be detachably connected.
5. skewback embedded anchor bar positioning system as described in claim 1, it is characterised in that: anchor pole positioning case (2) determine
Two blocks of steel plates being oppositely arranged are additionally provided between position plate (21), pass through shape steel bracket between the positioning plate (21) and the steel plate
(24) it is fixedly connected.
6. skewback embedded anchor bar positioning system as described in claim 1, it is characterised in that: connecting fulcrum (14) side
The limiting device for fixing the anchor pole positioning case (2) is additionally provided in bracket upright post (11).
7. a kind of construction method using skewback embedded anchor bar positioning system as described in any one of claims 1 to 6, feature
Be, in method the following steps are included:
Step 1, manufacture has the anchor pole positioning case (2) of several predeterminated position anchor pole hole locations (22)；
Step 2, install locating support (1): embedded bracket bottom plate (12), mounting bracket column (11) are adjusted to all and are erected
Column (11) is parallel with theoretical arch (6) of the bridge skewback (4), installs connecting fulcrum on each bracket upright post (11) top
(14)；
Step 3, install anchor pole positioning case (2): adjustment connecting fulcrum (14) to all connecting fulcrums (14) is perpendicular to bridge arch
In the same plane of the theoretical arch (6) of seat (4), positioning plate (21) is connected with connecting fulcrum (14).
8. a kind of skewback embedded anchor bar positioning system construction method as claimed in claim 7, it is characterised in that: the step 3
It is further comprising the steps of afterwards: installation anchor pole (5): by anchor pole (5) one by one after the anchor pole hole location (22) of positioning plate (21), by anchor
Bar (5) is fixed；It removes anchor pole positioning case (2).
9. a kind of skewback embedded anchor bar positioning system construction method as claimed in claim 7, it is characterised in that: the step 2
It is further comprising the steps of between step 3: described in installation is used to fix in the bracket upright post (11) of connecting fulcrum (14) side
Anchor pole positioning case (2) limiting device.
10. a kind of skewback embedded anchor bar positioning system construction method as claimed in claim 7, it is characterised in that: the step 3
It is further comprising the steps of between step 4: the anchor pole hole location (22) of anchor pole positioning case (2) being checked, it is fixed to calculate anchor pole
After position case (2) needs mobile data, anchor pole positioning case (2) is adjusted to design position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905896.7A CN106320186B (en) | 2016-10-18 | 2016-10-18 | A kind of skewback embedded anchor bar positioning system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905896.7A CN106320186B (en) | 2016-10-18 | 2016-10-18 | A kind of skewback embedded anchor bar positioning system and construction method |
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| CN106320186A CN106320186A (en) | 2017-01-11 |
| CN106320186B true CN106320186B (en) | 2019-02-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113737661B (en) * | 2021-10-11 | 2023-01-31 | 中铁二局集团有限公司 | Construction method for steel-concrete combined section of tower base of cable-stayed bridge |
| CN114250690B (en) * | 2022-01-25 | 2023-11-21 | 山东省交通规划设计院集团有限公司 | Steel-concrete combined arch base suitable for steel pipe concrete arch bridge |
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|---|---|---|---|---|
| KR20100067225A (en) * | 2008-12-11 | 2010-06-21 | 이규창 | Tension assembly |
| CN201896289U (en) * | 2010-09-03 | 2011-07-13 | 中交第二航务工程局有限公司 | Anchor rod locating device with two-way gradient |
| CN204676540U (en) * | 2015-04-02 | 2015-09-30 | 中国建筑第八工程局有限公司 | Anchor jacked pile anchor rod locating device |
| CN205315025U (en) * | 2016-01-26 | 2016-06-15 | 三峡大学 | High stability stock support |
| CN206346116U (en) * | 2016-10-18 | 2017-07-21 | 中铁大桥局集团第五工程有限公司 | A kind of skewback embedded anchor bar alignment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100067225A (en) * | 2008-12-11 | 2010-06-21 | 이규창 | Tension assembly |
| CN201896289U (en) * | 2010-09-03 | 2011-07-13 | 中交第二航务工程局有限公司 | Anchor rod locating device with two-way gradient |
| CN204676540U (en) * | 2015-04-02 | 2015-09-30 | 中国建筑第八工程局有限公司 | Anchor jacked pile anchor rod locating device |
| CN205315025U (en) * | 2016-01-26 | 2016-06-15 | 三峡大学 | High stability stock support |
| CN206346116U (en) * | 2016-10-18 | 2017-07-21 | 中铁大桥局集团第五工程有限公司 | A kind of skewback embedded anchor bar alignment system |
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