CN108374418A - Steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation - Google Patents
Steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation Download PDFInfo
- Publication number
- CN108374418A CN108374418A CN201810254073.1A CN201810254073A CN108374418A CN 108374418 A CN108374418 A CN 108374418A CN 201810254073 A CN201810254073 A CN 201810254073A CN 108374418 A CN108374418 A CN 108374418A
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- steel
- pipe column
- steel pipe
- steel plate
- pile casting
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 230
- 239000010959 steel Substances 0.000 title claims abstract description 230
- 238000009434 installation Methods 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000009412 basement excavation Methods 0.000 title claims abstract description 14
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 44
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000003252 repetitive effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/06—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers for observation while placing
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Foundations (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention discloses steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation, includes the following steps：After pile foundation reinforcement cage lifting, ten word direction casting concrete pier of steel pile casting and installation channel steel measure steel pile casting absolute altitude and coordinate, determine the relative elevation and coordinate of steel pipe column, twice supporting steel plate is welded on steel pile casting；Steel pipe column is lifted to hole, the first installation of steel pipe column is completed using steel pile casting as object of reference；Aperture channel steel and steel plate set up platform, and setting-out goes out coordinate in steel pipe column and marks；Laser plummet is set up, is finely adjusted with jack pair steel pipe column, target center is made to be overlapped with hot spot；It is with steel plate that steel pipe column and steel pile casting welding is integral.By installing twice supporting steel plate in steel pile casting, suspends in mid air when steel pipe column being enable to transfer, be adjusted using the centre coordinate and verticality of laser plummet and jack pair steel pipe column, do not have to carry out concrete placings before steel pipe column positioning is completed.
Description
Technical field
The present invention relates to a kind of steel pipe column precise positioning Fast Installation constructions in the construction of underground engineering sheltered reverse excavation
Method.
Background technology
Installation pile foundation plinth concrete needs are positioned manually in conventional steel column three times could pouring molding；Coagulation first
Soil is poured to locator elevation location, operating personnel down toward bottom hole by concrete chisel removal to locator bottom absolute altitude, in concrete table
Face setting-out goes out locator position and marks, manually installed locator, then pours anchor and position device concrete；Then steel pipe is lifted
Steel pipe column is sleeved on progress weld anchor on locator and consolidated, finally pours the concrete of anchoring steel pipe column by column.
Conventional steel column is positioned manually installation pile foundation plinth concrete and need to pour and could be molded three times, construction period compared with
It is long；For the safety for ensuring down toward bottom hole operating personnel, steel pile casting will need input a large amount of with proceeding to locator bottom absolute altitude or less 1m
Steel pile casting, while personnel down toward bottom hole operation exist suffocate, junk strike etc. security risks.
Invention content
The technical problem to be solved by the present invention is to：Steel pipe column precise positioning Fast Installation in a kind of sheltered reverse excavation is provided to apply
Work technique, to solve conventional steel column, to be positioned manually the installation pile foundation plinth concrete construction period long, needs input a large amount of
Steel pile casting, and the problem that operating personnel's security risk is big.
The technical scheme is that：
Steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation, comprises the steps of：
The first step, after pile foundation reinforcement cage lifting, ten word direction casting concrete pier of steel pile casting and installation channel steel；
Second step measures steel pile casting absolute altitude and coordinate, determines the relative elevation and coordinate of steel pipe column, first is welded on steel pile casting
Road supporting steel plate and second supporting steel plate, first of supporting steel plate are located at steel pipe column top absolute altitude or less 50cm, second support
Steel plate is located at steel pipe column epimere reinforcing ring；
Third walks, and steel pipe column is lifted to hole, steel face is respectively welded on first of supporting steel plate and second supporting steel plate
Plate transfers the reinforcing ring of steel pipe column to the steel facing of second supporting steel plate, and steel pipe column is completed by object of reference of steel pile casting
First installation,；
4th step, aperture channel steel and steel plate set up platform, and setting-out obtains steel pipe column centre coordinate and marks；
5th step sets up laser plummet, and the deviation of steel pipe column absolute altitude and center is adjusted with jack, makes target center and hot spot weight
It closes；
6th step, steel pipe column and steel pile casting welding is integral, pile foundation filling concrete is carried out using tremie method, conduit is from steel
Decentralization installation in tubing string.
In the first step, after pile foundation reinforcement cage lifting, ten word direction of steel pile casting pours the concrete of 1000*500*500mm
Pier and installation 150*1250mm channel steel supports, reinforcing fixation is carried out by steel pile casting, and channel steel one end is embedded in concrete pier, the other end with
Steel pile casting carries out full weld.
In second step, 50cm and first segment steel pipe column reinforcement ring position are respectively welded first below steel pipe column top absolute altitude
Supporting steel plate and second supporting steel plate, ten word directions arrangement, often locate three pieces of supporting steel plate, and point is welded on steel pile casting first, is connect
It and twice supporting steel plate absolute altitude is measured, absolute altitude allowable error ± 5mm, per pass relative relief is less than 2 mm, and absolute altitude meets
After it is required that full weld is carried out with steel pile casting.
In third step, hand fit's truck crane lifts steel pipe column to hole, in first of supporting steel plate and second branch
Steel facing is respectively welded on support steel plate, the reinforcing ring of steel pipe column is transferred to the steel facing of second supporting steel plate, is protected with steel
Cylinder is the first installation that object of reference completes steel pipe column.
In 4th step, aperture channel steel and steel plate set up platform, when putting up platform reserved 10cm hole, put at preformed hole
Sheet metal is a piece of, and setting-out obtains steel pipe column centre coordinate and is marked on sheet metal.
It in 5th step, is finely adjusted with the centre coordinate of jack pair steel pipe column on second steel facing, bottom is made to swash
The target center of light target is overlapped with hot spot, is then installed top lasers target on steel pipe column top, is welded on steel pipe column top and adjust steel plate,
It is finely adjusted with jack pair steel pipe column quadrangle absolute altitude between first of steel facing and adjusting steel plate, makes top lasers target target center
It is overlapped with hot spot, that then checks bottom laser target target center and hot spot overlaps situation, if not overlapping, needs to continue repetitive operation,
Until the center of steel pipe column and verticality are met the requirements.
In 6th step, erection of steel pipe column in place after, with steel plate by steel pipe column and steel pile casting welding it is integral, using tremie method
Pile foundation filling concrete is carried out, conduit carries out decentralization installation out of steel pipe column, and conduit bottom is away from stake bottom 0.3-0.5m.
Beneficial effects of the present invention：
By in steel pile casting install twice supporting steel plate, so that steel pipe column is suspended in mid air and carry out positioning adjusting, using swash
The centre coordinate and verticality of optical collimator and jack pair steel pipe column carry out precise positioning and quickly adjust, and have been positioned in steel pipe column
At preceding positioning and the support platform for not having to pour bottom, repeatedly pouring in traditional handicraft is avoided.
Compared with prior art, steel-pipe pile installation precision of the present invention is high, and the duration shortens, easy to operate, safe and efficient, people
Expenses of labour and related measure expense input are reduced.Operating personnel is not required to down to the bottom hole progress concrete of more than ten meters of even tens meters depths cut
Operation, reduces the danger of operating personnel's construction, while avoiding generating a large amount of dust because cutting concrete, improves operating personnel
Safety guarantee and construct it is more environmentally-friendly.
Description of the drawings：
The steel pipe cylindrical coordinates of Fig. 1 present invention finely tunes schematic diagram.
The steel pipe column absolute altitude of Fig. 2 present invention finely tunes schematic diagram.
The pile foundation filling concrete schematic diagram of Fig. 3 present invention.
Specific implementation mode
Steel pipe column precise positioning Fast Installation construction technology includes the following steps in sheltered reverse excavation in the present embodiment：
The first step, pile foundation reinforcement cage lifting after, 30 word direction of steel pile casting pour 1000*500*500mm concrete pier 4 and
150*1250mm channel steels 5 are installed to support, steel pile casting 3 is subjected to reinforcing fixation, 5 one end of channel steel is embedded in concrete pier 4, the other end with
Steel pile casting 3 carries out full weld.
Second step measures 3 absolute altitude of steel pile casting and coordinate, determines the relative elevation and coordinate of steel pipe column 1, is pushed up in steel pipe column 1
First of supporting steel plate 6a and second supporting steel is respectively welded in 50cm below absolute altitude and 1 reinforcing ring of first segment steel pipe column, 2 position
Plate 6b, ten word directions arrangement, often locates three pieces of supporting steel plate, and point is welded on steel pile casting 3 first, first of supporting steel plate 6a and second
Road supporting steel plate 6b absolute altitudes measure, and absolute altitude allowable error controls in ± 5mm, and per pass relative relief controls in 2 mm,
Absolute altitude meet the requirements after with steel pile casting 3 carry out full weld, throat depth 8mm, 20 mm of width.
Third walks, and hand fit 50T truck cranes lift steel pipe column 1 to hole, on first and second supporting steel plate 6a, 6b
Steel facing 7 is welded, per pass relative relief controls in 2 mm, throat depth 8mm, 20 mm of width, by the decentralization of steel pipe column 1 to the
It is the first installation that object of reference completes steel pipe column 1 with steel pile casting 3 on the steel facing 7 of two supporting steel plate 6b.
4th step, aperture channel steel 8 and steel plate 9 set up platform, when putting up platform reserved 10cm hole, put at preformed hole
Sheet metal is a piece of, and setting-out goes out 1 centre coordinate of steel pipe column and is marked on sheet metal.
5th step sets up laser plummet 10 on platform, removes sheet metal, opens laser, is first looked at by eyepiece
The deviation of bottom the laser target 11b target centers and hot spot of steel pipe column bottom end, with jack 12 to steel pipe column on second steel facing 7
1 coordinate is finely adjusted, and the laser target 11b hearts is made to be overlapped with hot spot, is then installed top lasers target 11a on 1 top of steel pipe column, is passed through
Eyepiece checks that the deviation of target center and hot spot, target center are overlapped with hot spot, illustrates that the verticality of steel pipe column 1 is met the requirements, as hot spot exists
On the right side of laser target center, then illustrate that steel pipe column 1 tilts to the left, steel pipe column 1 top solder, four groups of adjusting steel plates 13, in first of steel face
1 four jiaos of absolute altitudes of steel pipe column are finely adjusted with jack 12 between plate 7 and adjusting steel plate 13, laser target center is made to be overlapped with hot spot,
That then checks 1 bottom target center of steel pipe column and hot spot overlaps situation, if not overlapping, needs to continue repetitive operation, until in steel pipe column 1
The heart and verticality are met the requirements；
6th step, after steel pipe column 1 is installed in place, steel pipe column 1 welded with steel pile casting 3 with steel plate 14 it is integral, using tremie method
Carry out pile foundation filling concrete, 15 diameter 25cm of conduit, conduit 15 carries out decentralization installation out of steel pipe column 1,15 bottom of conduit away from
Stake bottom 0.4m.
The above description is merely a specific embodiment example, scope of protection of the present invention is not limited thereto.It is ripe
It knows the those skilled in the art in the technical scope disclosed by the present invention, change or replacement mode can be easily found, these
It should be covered by the protection scope of the present invention.For this purpose, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (7)
1. steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation, it is characterised in that comprise the steps of：
The first step, after pile foundation reinforcement cage lifting, (3) ten word direction casting concrete pier (4) of steel pile casting and installation channel steel (5)；
Second step measures steel pile casting (3) absolute altitude and coordinate, the relative elevation and coordinate of steel pipe column (1) is determined, in steel pile casting (3)
First of supporting steel plate (6a) of upper welding and second supporting steel plate（6b）, first of supporting steel plate (6a) be located at steel pipe column（1）
The high following 40-60cm of top mark, second supporting steel plate（6b）Positioned at steel pipe column（1）Epimere reinforcing ring（2）Place；
Third walks, and steel pipe column (1) is lifted to hole, in first of supporting steel plate (6a) and second supporting steel plate（6b）Upper point
Steel facing is not welded（7）, by the reinforcing ring of steel pipe column (1)（2）It transfers to second supporting steel plate（6b）Steel facing（7）On,
It is the first installation that object of reference completes steel pipe column (1) with steel pile casting (3)；
4th step, aperture channel steel (8) and steel plate (9) set up platform, and setting-out obtains steel pipe column (1) centre coordinate and marks；
5th step sets up laser plummet (10), and the deviation of steel pipe column (1) absolute altitude and center is adjusted with jack (12), makes target
The heart is overlapped with hot spot；
6th step, steel pipe column (1) and steel pile casting (3) welding is integral, pile foundation filling concrete is carried out using tremie method, is led
It manages (15) and transfers installation out of steel pipe column.
2. steel pipe column precise positioning Fast Installation construction technology, feature exist in sheltered reverse excavation according to claim 2
In：In the first step, after pile foundation reinforcement cage lifting, (3) ten word direction of steel pile casting pours the concrete pier of 1000*500*500mm
(4) and installation 150*1250mm channel steels (5) support, and steel pile casting (3) are carried out reinforcing fixation, channel steel (5) one end is embedded in concrete
Pier (4), the other end carry out full weld with steel pile casting (3).
3. steel pipe column precise positioning Fast Installation construction technology, feature exist in sheltered reverse excavation according to claim 2
In：In second step, the is respectively welded in the high following 50cm of steel pipe column (1) top mark and first segment steel pipe column (1) reinforcing ring (2) position
One of supporting steel plate (6a) and second supporting steel plate（6b）, ten word directions arrangement, often three pieces of the supporting steel plate in place, first point are welded in
On steel pile casting (3), then twice supporting steel plate absolute altitude is measured, absolute altitude allowable error ± 5mm, per pass relative relief is less than
2 mm, absolute altitude meet the requirements after with steel pile casting (3) carry out full weld.
4. steel pipe column precise positioning Fast Installation construction technology, feature exist in sheltered reverse excavation according to claim 2
In：In third step, hand fit's truck crane lifts steel pipe column (1) to hole, in first of supporting steel plate (6a) and second
Supporting steel plate（6b）On steel facing is respectively welded（7）, by the reinforcing ring of steel pipe column (1)（2）It transfers to second supporting steel plate
（6b）Steel facing（7）On, it is the first installation that object of reference completes steel pipe column (1) with steel pile casting (3).
5. steel pipe column precise positioning Fast Installation construction technology, feature exist in sheltered reverse excavation according to claim 2
In：In 4th step, aperture channel steel (8) and steel plate (9) set up platform, when putting up platform reserved 10cm hole, at preformed hole
It is a piece of to put sheet metal, setting-out obtains steel pipe column (1) centre coordinate and is marked on sheet metal.
6. steel pipe column precise positioning Fast Installation construction technology, feature exist in sheltered reverse excavation according to claim 1
In：In 5th step, the center of steel pipe column (1) is sat with jack (12) on the steel facing (7) of second supporting steel plate (6b)
Mark is finely adjusted, and the target center of bottom laser target (11b) is made to be overlapped with hot spot, then installs top lasers on steel pipe column (1) top
Target (11a), in steel pipe column（1）Top welding adjusts steel plate（13）, first supporting steel plate (6a) steel facing (7) and adjust
Steel plate（13）Between steel pipe column (1) quadrangle absolute altitude is finely adjusted with jack (12), make top lasers target (11a) target center and light
Spot overlaps, and that then checks bottom laser target (11b) target center and hot spot overlaps situation, if not overlapping, needs to continue to repeat to grasp
Make, until the center of steel pipe column (1) and verticality are met the requirements.
7. steel pipe column precise positioning Fast Installation construction technology, feature exist in sheltered reverse excavation according to claim 2
In：It is with steel plate (14) that steel pipe column (1) and steel pile casting (3) welding is integral after steel pipe column (1) is installed in place in 6th step, it adopts
Pile foundation filling concrete is carried out with tremie method, conduit (15) carries out decentralization installation out of steel pipe column (1), and conduit (15) bottom is away from stake
Bottom 0.3-0.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810254073.1A CN108374418A (en) | 2018-03-26 | 2018-03-26 | Steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810254073.1A CN108374418A (en) | 2018-03-26 | 2018-03-26 | Steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation |
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| Publication Number | Publication Date |
|---|---|
| CN108374418A true CN108374418A (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810254073.1A Pending CN108374418A (en) | 2018-03-26 | 2018-03-26 | Steel pipe column precise positioning Fast Installation construction technology in a kind of sheltered reverse excavation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952007A (en) * | 2018-08-15 | 2018-12-07 | 中电建南方建设投资有限公司 | Construction is positioned manually in a kind of permanent steel column |
| CN109238254A (en) * | 2018-09-30 | 2019-01-18 | 北京市政建设集团有限责任公司 | A kind of hole stake cultellation method |
| CN109371961A (en) * | 2018-12-08 | 2019-02-22 | 成都鑫都建设工程有限公司 | A kind of subway station steel pipe column and its construction technology |
| CN110295593A (en) * | 2019-06-28 | 2019-10-01 | 张殿忠 | A kind of hypogee lid digs the construction technology of steel pipe column |
| CN110629744A (en) * | 2019-09-16 | 2019-12-31 | 中铁广州工程局集团深圳工程有限公司 | Construction process of steel pipe concrete pile of subway station |
| CN115369858A (en) * | 2022-07-29 | 2022-11-22 | 中国化学工程第六建设有限公司 | Construction process of concrete filled steel tubular column |
| 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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| CN104110035A (en) * | 2013-04-16 | 2014-10-22 | 中冶天工上海十三冶建设有限公司 | Perpendicularity correcting device for concrete-filled steel tube columns constructed by top-down process and construction method implemented by perpendicularity correcting device |
| CN104141301A (en) * | 2014-03-25 | 2014-11-12 | 中国建筑第四工程局有限公司 | Construction method and structure for mounting reverse-construction steel pipe column in rotary drilled pile hole |
| CN104328799A (en) * | 2014-11-17 | 2015-02-04 | 中建交通建设集团有限公司 | Accurate positioning method for steel pipe column in cover and cut top-down subway station |
| CN106245627A (en) * | 2016-08-30 | 2016-12-21 | 中铁三局集团有限公司 | A kind of quick positioning construction method of steel pipe stanchion |
| CN205857238U (en) * | 2016-07-08 | 2017-01-04 | 中铁三局集团有限公司 | A kind of underground engineering steel pipe column pilework |
| CN107288357A (en) * | 2017-08-18 | 2017-10-24 | 云南省建设投资控股集团有限公司 | In reverse construction steel pipe column plumbing device and utilize the device carry out pile integrated construction technique |
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| GB1231018A (en) * | 1967-08-09 | 1971-05-05 | ||
| CN104110035A (en) * | 2013-04-16 | 2014-10-22 | 中冶天工上海十三冶建设有限公司 | Perpendicularity correcting device for concrete-filled steel tube columns constructed by top-down process and construction method implemented by perpendicularity correcting device |
| CN104141301A (en) * | 2014-03-25 | 2014-11-12 | 中国建筑第四工程局有限公司 | Construction method and structure for mounting reverse-construction steel pipe column in rotary drilled pile hole |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952007A (en) * | 2018-08-15 | 2018-12-07 | 中电建南方建设投资有限公司 | Construction is positioned manually in a kind of permanent steel column |
| CN109238254A (en) * | 2018-09-30 | 2019-01-18 | 北京市政建设集团有限责任公司 | A kind of hole stake cultellation method |
| CN109371961A (en) * | 2018-12-08 | 2019-02-22 | 成都鑫都建设工程有限公司 | A kind of subway station steel pipe column and its construction technology |
| CN110295593A (en) * | 2019-06-28 | 2019-10-01 | 张殿忠 | A kind of hypogee lid digs the construction technology of steel pipe column |
| CN110629744A (en) * | 2019-09-16 | 2019-12-31 | 中铁广州工程局集团深圳工程有限公司 | Construction process of steel pipe concrete pile of subway station |
| CN110629744B (en) * | 2019-09-16 | 2021-08-13 | 中铁广州工程局集团深圳工程有限公司 | Construction process of steel pipe concrete pile of subway station |
| CN115369858A (en) * | 2022-07-29 | 2022-11-22 | 中国化学工程第六建设有限公司 | Construction process of concrete filled steel tubular column |
| CN115369858B (en) * | 2022-07-29 | 2023-12-12 | 中国化学工程第六建设有限公司 | Construction process of concrete filled steel tubular column |
| 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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