CN106996107A - A kind of filling pile head abolishes device and its construction method - Google Patents
A kind of filling pile head abolishes device and its construction method Download PDFInfo
- Publication number
- CN106996107A CN106996107A CN201710384650.4A CN201710384650A CN106996107A CN 106996107 A CN106996107 A CN 106996107A CN 201710384650 A CN201710384650 A CN 201710384650A CN 106996107 A CN106996107 A CN 106996107A
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 230000002787 reinforcement Effects 0.000 claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 17
- 125000006850 spacer group Chemical group 0.000 claims abstract description 15
- 239000000725 suspension Substances 0.000 claims description 13
- 210000003205 muscle Anatomy 0.000 claims description 8
- 230000010412 perfusion Effects 0.000 claims description 5
- 241001669679 Eleotris Species 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Device is abolished the invention discloses a kind of filling pile head, including multiple coaxial annular casings, between the top of annular casing an integrally-built device body is fixedly connected as by attachment means, gap between the outermost annular casing of device body annular casing adjacent thereto is that shackle plate has been fixed with the top of cage bar locating clip layer, device body and a mouthful support has been worn for the reinforcing bar for making the spacer bar of steel reinforcement cage pass through and be positioned to the spacer bar of steel reinforcement cage.Device is abolished to reduce bond stress between cage bar and pile crown concrete, eliminate and pick while hindering cage bar risk that pile crownization is greatly small, block-by-block can be carried out to pile crown to abolish, reduce the performance requirement to lifting appliance, improve construction efficiency and the scope of application that original pile crown abolishes construction, construction fugitive dust is reduced, construction cost is reduced.
Description
Technical field
The present invention relates to civil engineering foundation construction technical field, in particular to a kind of filling pile head abolish device and
Its construction method.
Background technology
Cast-in-place concrete pile is because of its reliable in quality, and construction technology is ripe, and ground adaptability is strong, and bearing capacity is good, extensive
Applied to all kinds of foundation engineerings.In the construction of cast-in-place concrete pile, to ensure the quality of pile crown concrete, it is to avoid pile foundation termination
Doping laitance, the specification of mud, it is desirable to which concrete perfusion will be beyond filling pile head the absolute altitude 0.5~1.0m, Ran Houzai set
Cut the part (being referred to as broken pile head) exceeded.It is universal at present to cut the concrete for exceeding setting filling pile head part
Removed using artificial chisel or method that human assistance small-sized machine is abolished.This method is inwardly abolished due to the surrounding from pile crown,
On the one hand there is the risk picked and hinder cage bar during abolishing, be on the other hand relatively large in diameter and then abolished by pile body on the inside of pile crown cage bar
Thickness considerable influence, exists and abolishes workload greatly, labor intensity is big, speed of application is slow, abolishes process airborne dust big, dangerous higher
The shortcomings of, large diameter pile foundation pile crown is not applied to especially abolishes operation, and large diameter pile foundation belongs to current Bored Pile of Bridge
Development trend.
The content of the invention
Present invention aim to solve a kind of the not enough there is provided easy construction of above-mentioned background technology, hand labor is strong
That spends small, the safe filling pile head for abolishing operation suitable for large diameter pile foundation pile crown abolishes device and its construction party
Method.
In order to achieve this, filling pile head designed by the present invention abolishes device, including multiple coaxial annular shields
Between cylinder, the top of annular casing an integrally-built device body, described device body are fixedly connected as by attachment means
Gap between outermost annular casing annular casing adjacent thereto is cage bar locating clip layer, the top of described device body
It has been fixed with shackle plate and the reinforcing bar for making the spacer bar of steel reinforcement cage pass through and be positioned to the spacer bar of steel reinforcement cage
Wear a mouthful support.
Specifically, the attachment means are the connection strength plate being fixedly connected at the top of multiple coaxial annular casings or are fixed on
Device top plate at the top of multiple coaxial annular casings, if device top plate, then opens up through hole perfusion in the middle part of device top plate
Concrete, if being coupled the outer wall of strength plate, the then inwall of the outermost annular casing of device body annular casing adjacent thereto
The distance between be less than cage bar diameter so that cage bar cage bar positioning interlayer in position.
It is preferred that, be fixed with the top of described device body at least two relative to the axisymmetrical for abolishing device lifting
Otic placode.
It is preferred that, two reinforcing bars relative to the axisymmetrical of device body are fixed with the top of described device body and wear mouth
Support, it is the square set that the reinforcing bar being fixed at the top of device body is surrounded that the reinforcing bar, which wears mouthful support,.
Further, the height of described device body is more than pile crown and abolishes the hole top of segment length and stake holes to the length of cage bar
Sum.
The construction method for abolishing device based on filling pile head described above, comprises the following steps：
1), before stake holes drilling, decentralization final section steel reinforcement cage is completed, device body is arranged and is fixed on final section steel
The top of muscle cage；
2), the final section steel reinforcement cage for being provided with device body is put into stake holes, the spacer bar of steel reinforcement cage is passed through
Reinforcing bar wears a mouthful support, and two of spacer bar is placed on the sleeper for be layed in ground is fixed, and irrigates mixed into stake holes
Solidifying soil, forms pile foundation；
3), after pile foundation concrete reaches initial setting strength, the spacer bar of steel reinforcement cage is removed, the steel wire rope of loop wheel machine is worn
Cross shackle plate and extracted device body by loop wheel machine；
4), after pile foundation concrete reaches the intensity of code requirement, cushion cap foundation ditch is excavated, when cushion cap excavation of foundation pit is completed simultaneously
Excavate out after pile crown section, the concrete that section is abolished to pile crown is cut.
It is preferred that, fiber band can be passed through after shackle plate and to have been fixed with cage bar colligation in the step 1.By device body
Before the top for being set in final section steel reinforcement cage, in the inwall and ring adjacent thereto of the outermost annular casing of device body
Releasing agent is coated with the outer wall of shape casing.
Further, in the step 2 at the end of concreting is fast, multiple hang is inserted on the top of pile crown concrete
Ring, the suspension ring include being fixedly connected with semi-circular shape ear muscle between two vertical dowels, the top of two dowels, described many
Bearing rod is fixedly connected between individual suspension ring.
It is further preferred that hand hammer, wedge can be passed through if the number of plies of annular casing is more than or equal to three layers in the step 4
Son by it is outer and it is interior the concrete of pile crown section is peeled off and transported from level to level, if the number of plies of annular casing is less, use first
Air drill abolishes section to pile crown and digs out ring groove, then throws several chocks into, and chock is tapped by external force,
Pile crown is abolished into section concrete wedge to break after the degree that can pull off to loop wheel machine, by wire rope rope on suspension ring, passes through loop wheel machine hoisting steel
Cord will need the pile crown part cut integrally to hang out after separation.
The beneficial effects of the invention are as follows：1st, safety：By the way that the concrete thickness of abolishing of cage bar position is farthest become
It is thin so that cage bar position is clearly presented on operating personnel at the moment, farthest protects cage bar.2nd, it is quick：All masters
Muscle disposably presss from both sides shield, at the same reduce abolish concrete subregion abolish difficulty, improve and abolish operation work efficiency, be particularly suitable for use in
Large diameter pile foundation pile crown abolishes construction.3rd, it is economical：Device low manufacture cost, turnover rate is high, while improving effect, reduces
Construction cost.4th, it is environmentally friendly：Piecemeal, which is abolished, can greatly reduce and noise content, can meet the construction requirement in densely inhabited district.
Brief description of the drawings
Fig. 1 is that top is that the device of abolishing for being coupled strength plate is sheathed at the top of steel reinforcement cage and is positioned over bowing in stake holes in the present invention
View；
The sectional view that Fig. 2 is A-A in Fig. 1；
The sectional view that Fig. 3 is B-B in Fig. 1；
Fig. 4 is that top is that the device of abolishing of device top plate is sheathed at the top of steel reinforcement cage and is positioned over bowing in stake holes in the present invention
View；
The sectional view that Fig. 5 is C-C in Fig. 4；
The sectional view that Fig. 6 is D-D in Fig. 4；
Fig. 7 is the front view of suspension ring in the present invention；
Wherein, 1-device body (1.1-annular casing, 1.2-connection strength plate, 1.3-device top plate), 2-suspension ring
(2.1-dowel, 2.2-semi-circular shape ear muscle), 3-cage bar positioning interlayer, 4-shackle plate is played, 5-reinforcing bar wears a mouthful support, 6-
Cage bar, 7-stake holes, 9-bearing rod, 10-stirrup, 11-through hole.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Abolishing device has two kinds of structure types：
Filling pile head as shown in Fig. 1-3 abolishes device, including three coaxial annular casings 1.1, annular casing
Between 1.1 top an integrally-built device body 1 is fixedly connected as by being coupled strength plate 1.2.Device body 1 is outermost
Gap between annular casing annular casing adjacent thereto is cage bar locating clip layer 3, the outermost annular casing of device body 1
The distance between the inwall outer wall of annular casing adjacent thereto be less than the diameter of cage bar 6.
As shown in Fig. 4-6, including two coaxial annular casings 1.1, device is passed through between the top of annular casing 1.1
Top plate 1.3 is fixedly connected as an integrally-built device body 1.The outermost annular casing of device body 1 ring adjacent thereto
Gap between shape casing is cage bar locating clip layer 3, and the middle part of device top plate 1.3 is provided with the through hole 11 of concrete perfusion.
The top of the device body 1 of two kinds of structures is respectively and fixedly provided with two and plays hanger relative to the axisymmetrical for abolishing device
The reinforcing bar of plate 4 and two axisymmetricals relative to device body 1 wears mouthful support 5, and reinforcing bar wears mouthful support 5 to be fixed on device sheet
The square set that the reinforcing bar at the top of body 1 is surrounded.The height of device body 1 is all higher than the hole that pile crown abolishes segment length and stake holes 7
Push up the length sum of cage bar 6.
When attachment means is connection strength plates 2, the inwall of the outermost annular casing of device body 1 annular adjacent thereto
The distance between outer wall of casing is slightly less than the diameter of cage bar 6, so that cage bar 6 is positioned in cage bar locating clip 3, can also pass through
Reinforcing bar is passed through in reinforcing bar wears mouthful support 5, device whereabouts is abolished in limitation, to ensure positioning of the cage bar in cage bar locating clip 3.
The construction method for abolishing device designed by the present invention comprises the following steps：
1), before stake holes drilling, decentralization final section steel reinforcement cage is completed, in the outermost annular casing of device body 1
Releasing agent is coated with the outer wall of inwall and annular casing adjacent thereto.Device body 1 is arranged and is fixed on final section steel
The top of muscle cage, fiber band has been passed through after shackle plate 4 and fixed with the colligation of cage bar 6.
2), the final section steel reinforcement cage for being provided with device body 1 is put into stake holes 7, the spacer bar of steel reinforcement cage is worn
Cross reinforcing bar and wear mouthful support 5, and two of spacer bar is placed on the sleeper for be layed in ground be fixed, filled into stake holes 7
Concrete is noted, pile foundation is formed；At the end of concreting is fast, multiple suspension ring 2, such as Fig. 7 are inserted on the top of pile crown concrete
It is shown：Suspension ring 2 include being fixedly connected with semi-circular shape ear muscle 2.2 between two vertical dowels 2.1, the top of two dowels,
Bearing rod 9 is fixedly connected between multiple suspension ring 2.
3), after pile foundation concrete reaches initial setting strength, the spacer bar of steel reinforcement cage is removed, the steel wire rope of loop wheel machine is worn
Cross shackle plate 4 and extracted device body 1 by loop wheel machine；
4), after pile foundation concrete reaches the intensity of code requirement, cushion cap foundation ditch is excavated, when cushion cap excavation of foundation pit is completed simultaneously
Excavate out after pile crown section, can be by hand hammer, chock by outer and interior the concrete of pile crown section is peeled off and transported from level to level.Also can be first
Section is first abolished to pile crown using air drill and digs out ring groove, several chocks are then thrown into, and chock is entered by external force
Row is tapped, and pile crown is abolished into section concrete wedge breaks after the degree that can be pulled off to loop wheel machine, by wire rope rope on suspension ring, passes through loop wheel machine
Hoisting wirerope will need the pile crown part cut integrally to hang out after separation.
The present invention abolishes section concrete progress subregion to pile crown by abolishing device, in reduction cage bar 6 and pile crown concrete
Between bond stress, eliminate and pick while hindering 6 risk of cage bar that pile crownization is greatly small, realize pile crown block-by-block and abolish, reduce pair
The performance requirement of lifting appliance, improves the construction efficiency and the scope of application of original pile crown breaking construction method, reduces construction
Airborne dust, reduces construction cost.With applied widely, constructing operation is easy, and speed of application is very fast, reliable construction quality it is excellent
Point.The requirement of green construction is met, the large diameter pile foundation pile crown that is particularly suitable for use in abolishes construction.
The above described is only a preferred embodiment of the present invention, not doing any formal to the structure of the present invention
Limitation.Any simple modification, equivalent variations and modification that every technical spirit according to the present invention is made to above example,
In the range of still falling within technical scheme.
Claims (10)
1. a kind of filling pile head abolishes device, it is characterised in that：It includes multiple coaxial annular casings (1.1), annular
Between the top of casing (1.1) an integrally-built device body (1), described device body are fixedly connected as by attachment means
(1) gap between outermost annular casing annular casing adjacent thereto is cage bar locating clip layer (3), described device body
(1) shackle plate (4) has been fixed with the top of and for making the spacer bar of steel reinforcement cage pass through and enter to the spacer bar of steel reinforcement cage
The reinforcing bar of row positioning wears a mouthful support (5).
2. a kind of as claimed in claim 1 filling pile head abolishes device, it is characterised in that：The attachment means are fixation
Connection strength plate (1.2) at the top of the multiple coaxial annular casings (1.1) of connection, the outermost annular shield of described device body (1)
The distance between inwall outer wall of annular casing adjacent thereto of cylinder is less than the diameter of cage bar (6).
3. a kind of as claimed in claim 1 filling pile head abolishes device, it is characterised in that：The attachment means are fixation
Device top plate (1.3) at the top of multiple coaxial annular casings (1.1), described device top plate is provided with perfusion in the middle part of (1.3)
The through hole (11) of concrete.
4. a kind of as claimed in claim 1 filling pile head abolishes device, it is characterised in that：Described device body (1)
Top is fixed with least two and plays shackle plate (4) relative to the axisymmetrical for abolishing device；The top of described device body (1)
The reinforcing bar for being fixed with two axisymmetricals relative to device body (1) wears a mouthful support (5), and the reinforcing bar wears a mouthful support (5) and is
The square set that the reinforcing bar being fixed at the top of device body (1) is surrounded.
5. a kind of as claimed in claim 1 filling pile head abolishes device, it is characterised in that：Described device body (1)
Highly it is more than pile crown and abolishes the hole top of segment length and stake holes (7) to the length sum of cage bar (6).
6. the construction method for abolishing device based on a kind of filling pile head described in the claims 1, it is characterised in that：Bag
Include following steps：
1), before stake holes drilling, decentralization final section steel reinforcement cage is completed, device body (1) is arranged and is fixed on final section steel
The top of muscle cage；
2), the final section steel reinforcement cage for being provided with device body (1) is put into stake holes (7), the spacer bar of steel reinforcement cage is worn
Cross reinforcing bar and wear a mouthful support (5), and two of spacer bar is placed on the sleeper for be layed in ground be fixed, to stake holes (7)
Interior concrete perfusion, forms pile foundation；
3), after pile foundation concrete reaches initial setting strength, the spacer bar of steel reinforcement cage is removed, the steel wire penetrating of loop wheel machine is played
Shackle plate (4) is simultaneously extracted device body (1) by loop wheel machine；
4), after pile foundation concrete reaches the intensity of code requirement, cushion cap foundation ditch is excavated, when cushion cap excavation of foundation pit is completed and is excavated
Go out after pile crown section, the concrete that section is abolished to pile crown is cut.
7. a kind of construction method for abolishing device of filling pile head as claimed in claim 6, it is characterised in that：The step
Fiber band can be passed through shackle plate (4) to be fixed afterwards with cage bar (6) colligation in 1.
8. a kind of construction method for abolishing device of filling pile head as claimed in claims 6 or 7, it is characterised in that：It is described
In step 1 before device body (1) is set in into the top of final section steel reinforcement cage, in device body (1) outermost ring
Releasing agent is coated with the outer wall of the inwall of shape casing and annular casing adjacent thereto.
9. a kind of construction method for abolishing device of filling pile head as claimed in claim 6, it is characterised in that：The step
In 2 at the end of concreting is fast, multiple suspension ring (2) are inserted on the top of pile crown concrete, the suspension ring (2) include two
Semi-circular shape ear muscle (2.2), the multiple suspension ring (2) are fixedly connected between vertical dowel (2.1), the top of two dowels
Between be fixedly connected with bearing rod (9).
10. a kind of construction method for abolishing device of filling pile head as claimed in claim 9, it is characterised in that：The step
, can be by hand hammer, chock by outer and interior from level to level by pile crown if the number of plies of annular casing (1.1) is more than or equal to three layers in rapid 4
The concrete of section is peeled off and transported, broken to pile crown using air drill first if the number of plies of annular casing (1.1) is less
Except section digs out ring groove, several chocks then being thrown into, and chock being tapped by external force, pile crown is abolished into section concrete
Wedge breaks after the degree that can be pulled off to loop wheel machine, and by wire rope rope on suspension ring (2), chisel will be needed after separation by loop wheel machine hoisting wirerope
The pile crown part removed integrally is hung out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384650.4A CN106996107A (en) | 2017-05-26 | 2017-05-26 | A kind of filling pile head abolishes device and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384650.4A CN106996107A (en) | 2017-05-26 | 2017-05-26 | A kind of filling pile head abolishes device and its construction method |
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| CN106996107A true CN106996107A (en) | 2017-08-01 |
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| CN201710384650.4A Pending CN106996107A (en) | 2017-05-26 | 2017-05-26 | A kind of filling pile head abolishes device and its construction method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708377A (en) * | 2018-04-23 | 2018-10-26 | 江苏省交通工程集团有限公司 | A kind of bridge struction pile pile crown is broken to cut device and application method |
| CN108995049A (en) * | 2018-07-10 | 2018-12-14 | 广东省建筑工程机械施工有限公司 | One kind cutting concrete precast pipe pile pile crown and retains reinforcing bar method |
| CN109610455A (en) * | 2019-01-28 | 2019-04-12 | 中铁局集团有限公司 | A method for removing the pile head of a cast-in-place pile |
| CN109680681A (en) * | 2018-12-20 | 2019-04-26 | 宁波交通工程咨询监理有限公司 | A kind of pile crown restructuring bankrupt of cast-in-situ bored pile |
| CN111827283A (en) * | 2020-07-07 | 2020-10-27 | 中铁十一局集团第一工程有限公司 | Bridge pile foundation pile head breaking protection pretreatment method and device |
| CN112112160A (en) * | 2020-10-21 | 2020-12-22 | 深圳宏业基岩土科技股份有限公司 | Device convenient for breaking pile head of large-diameter secant pile |
| CN112195915A (en) * | 2020-10-21 | 2021-01-08 | 深圳宏业基岩土科技股份有限公司 | Method for conveniently breaking pile head of large-diameter secant pile |
| CN115094892A (en) * | 2022-05-18 | 2022-09-23 | 安徽省交通规划设计研究总院股份有限公司 | Multi-station auxiliary device and method for bridge construction |
| CN116772814A (en) * | 2023-08-18 | 2023-09-19 | 贵州省公路工程集团有限公司 | Steel reinforcement cage perpendicularity detection device and method with positioning and adjusting functions |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708377A (en) * | 2018-04-23 | 2018-10-26 | 江苏省交通工程集团有限公司 | A kind of bridge struction pile pile crown is broken to cut device and application method |
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| CN108995049A (en) * | 2018-07-10 | 2018-12-14 | 广东省建筑工程机械施工有限公司 | One kind cutting concrete precast pipe pile pile crown and retains reinforcing bar method |
| CN108995049B (en) * | 2018-07-10 | 2021-03-02 | 广东省建筑工程机械施工有限公司 | Method for cutting concrete precast tubular pile head to reserve steel bars |
| CN109680681A (en) * | 2018-12-20 | 2019-04-26 | 宁波交通工程咨询监理有限公司 | A kind of pile crown restructuring bankrupt of cast-in-situ bored pile |
| CN109610455A (en) * | 2019-01-28 | 2019-04-12 | 中铁局集团有限公司 | A method for removing the pile head of a cast-in-place pile |
| CN109610455B (en) * | 2019-01-28 | 2021-01-08 | 中铁一局集团有限公司 | Pile head breaking method for cast-in-place pile |
| CN111827283A (en) * | 2020-07-07 | 2020-10-27 | 中铁十一局集团第一工程有限公司 | Bridge pile foundation pile head breaking protection pretreatment method and device |
| CN112195915A (en) * | 2020-10-21 | 2021-01-08 | 深圳宏业基岩土科技股份有限公司 | Method for conveniently breaking pile head of large-diameter secant pile |
| CN112112160A (en) * | 2020-10-21 | 2020-12-22 | 深圳宏业基岩土科技股份有限公司 | Device convenient for breaking pile head of large-diameter secant pile |
| CN112195915B (en) * | 2020-10-21 | 2022-03-04 | 深圳宏业基岩土科技股份有限公司 | Method for conveniently breaking pile head of large-diameter secant pile |
| CN112112160B (en) * | 2020-10-21 | 2024-12-24 | 深圳宏业基岩土科技股份有限公司 | Device for facilitating the removal of large diameter interlocking pile heads |
| CN115094892A (en) * | 2022-05-18 | 2022-09-23 | 安徽省交通规划设计研究总院股份有限公司 | Multi-station auxiliary device and method for bridge construction |
| CN115094892B (en) * | 2022-05-18 | 2023-08-22 | 安徽省交通规划设计研究总院股份有限公司 | Multi-station auxiliary device and auxiliary method for bridge construction |
| CN116772814A (en) * | 2023-08-18 | 2023-09-19 | 贵州省公路工程集团有限公司 | Steel reinforcement cage perpendicularity detection device and method with positioning and adjusting functions |
| CN116772814B (en) * | 2023-08-18 | 2023-10-17 | 贵州省公路工程集团有限公司 | Steel reinforcement cage perpendicularity detection device and method with positioning and adjusting functions |
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Application publication date: 20170801 |