CN105908639A - Prefabricated box culvert and rapid positioning construction method - Google Patents
Prefabricated box culvert and rapid positioning construction method Download PDFInfo
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- CN105908639A CN105908639A CN201610272904.9A CN201610272904A CN105908639A CN 105908639 A CN105908639 A CN 105908639A CN 201610272904 A CN201610272904 A CN 201610272904A CN 105908639 A CN105908639 A CN 105908639A
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- box culvert
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- 238000010276 construction Methods 0.000 title claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 67
- 239000010959 steel Substances 0.000 claims abstract description 67
- 239000003822 epoxy resin Substances 0.000 claims abstract description 10
- 239000003292 glue Substances 0.000 claims abstract description 10
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims abstract description 9
- 238000009412 basement excavation Methods 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 5
- 210000003205 muscle Anatomy 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 210000002435 tendon Anatomy 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a prefabricated box culvert and a rapid positioning construction method, wherein the box culvert is prefabricated in a factory and transported to a construction site; excavating a groove with a rectangular cross section underground in a construction site, and arranging steel plates on two side walls of the groove; a bottom plate is arranged on the bottom surface of the groove, H-shaped steel is respectively arranged along the longitudinal direction of two side edges of the bottom plate to form a longitudinal track, and a plurality of steel wheels are uniformly arranged on the upper surface of the H-shaped steel; a moving inlet is formed in the upper portion of the groove, the box culvert is placed on the longitudinal rail from the moving inlet, and the box culvert is transported to a construction position one by one through a tractor; coating epoxy resin glue on the contact surface of each box culvert, sticking the box culverts through the epoxy resin glue when the box culverts are in contact, and fixing the box culverts into a whole by the longitudinal prestressed tendons penetrating through the reserved holes on each box culvert; and (5) dismantling the steel plate, covering by backfilling soil, and finishing construction. Compared with the existing pushing method, the construction method of the invention can be used for fast construction so as to shorten the construction period, is suitable for the section with large traffic volume and can reduce the labor cost.
Description
Technical field
The present invention relates to a kind of urban engineering project construction method, particularly relate to a kind of prefabricated box culvert and
Quickly positioning construction method.
Background technology
Box culvert refers to the culvert that barrel is built with reinforced concrete box shaped tube coupling.Box culvert is by one or many
Individual square or rectangular cross section forms, and is typically made up of armored concrete or bricklaying, but armored concrete should
With relatively wide, when across footpath less than 4m, use box culvert, for pipe culvert, reinforced concrete box culvert be one just
Suitable succedaneum, pier, upper and lower plates all unanimously pour.
In municipal works at present, box culvert is all on-the-spot earth excavation, formwork erection, assembling reinforcement, pours coagulation
Soil, maintenance molding, after reaching some strength, incremental launching method makes each sections unify again, construction technology
Quantities is bigger, and surrounding is not only impacted by site operation, and is unfavorable for that traffic is transported
Defeated, the duration is longer, expenses of labour is bigger.Use the sections overall durability after incremental launching method molding and shock resistance
Construction requirement can be well positioned to meet, once go wrong, keep in repair time and effort consuming.
Because the defect that above-mentioned existing box culvert construct exists, the present inventor is based on being engaged in this series products
Manufacture and design for many years abundant practical experience and Professional knowledge, and coordinate the utilization of scientific principle, the most in addition
Research and innovation, to founding a kind of novel prefabricated box culvert and quick positioning construction method so that it is have more
Practicality.Through constantly research, design, and after repeatedly studying sample and improving, finally found
Go out the present invention having practical value.
Summary of the invention
Present invention is primarily targeted at, overcome the defect that existing box culvert construct exists, and provide one
Plant novel prefabricated box culvert and quick positioning construction method, shorten installation period, thus more suitable for practicality,
And there is the value in industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.Foundation
The present invention propose prefabricated box culvert, box culvert be cross section be the hollow tubular structure of tetragon, described box culvert
Two relative sides are respectively A face and B face, are provided with multiple groove on the side in described A face,
Being provided with multiple projection on the side in described B face, the position of described groove is corresponding with raised position.
Interconnecting according to the length laid, the box culvert A face being disposed adjacent and B face, projection is blocked and enters groove
In, there is more preferable interconnection function.
Further, aforesaid prefabricated box culvert, setting parallel to each other on the bottom surface of described box culvert
Having the space placing steel wheel, the space placing steel wheel is half arc hole, is used for placing steel wheel, it is achieved
Steel wheel sliding on H type track.
Further, aforesaid prefabricated box culvert, it is respectively arranged with at four drift angles of described box culvert
Reserving hole, described reserving hole is through hole, and reserving hole is used for placing deformed bar, finally
Multiple box culverts are fixed into entirety.
Further, aforesaid prefabricated box culvert, the size of described half arc hole is more than described steel wheel
Size.
The quick positioning construction method of prefabricated box culvert, including following operating procedure,
Step one, is prefabricated in the factory box culvert according to construction requirement, and transports job site；
Step 2, the on construction ground groove of one square-section of underground excavation, at the two of described groove
Steel plate is set on sidewall；
Step 3, arranges base plate in the bottom surface of described groove, and in the dual-side longitudinal direction of described base plate
Being respectively provided with H profile steel, form long rails, the upper surface in H profile steel is provided with multiple steel uniformly
Wheel；
Step 4, the top of described groove is provided with moves into mouth, is placed on described vertical by box culvert from moving into mouth
On track, by traction machine by described box culvert one by one transport construction position；
Step 5, at the contact surface brushwork epoxy resin glue of each box culvert, passes through during the contact of described box culvert
Epoxide-resin glue is pasted mutually, by longitudinal prestressing muscle through the reserving hole on each box culvert by described
Box culvert is fixed into entirety；
Step 6, removes the steel plate arranged on two side, and backfill soil covers, and completes construction.
Further, the quick positioning construction method of aforesaid prefabricated box culvert, in described groove two side
Between the steel plate of upper setting, spiral anchor rod is installed, supports described steel plate.
Further, the quick positioning construction method of aforesaid prefabricated box culvert, on two pieces of described steel plate tops
Face is provided with covering plate.
Further, the quick positioning construction method of aforesaid prefabricated box culvert, in described step 3,
The base plate that the bottom surface of described groove is arranged is cement concrete constructions.
Further, the quick positioning construction method of aforesaid prefabricated box culvert, upper in described H profile steel
Surface arranges a steel wheel every 0.2～2m, it is preferred that arrange a steel wheel every 1m.
Further, the quick positioning construction method of aforesaid prefabricated box culvert, described spiral anchor rod is returning
Banket and remove before covering.
By technique scheme, prefabricated box culvert and the quick positioning construction method of the present invention at least have
Following advantages:
The prefabricated box culvert of the present invention by being respectively provided with multiple groove and convex in the side of the box culvert being connected
Rise, by groove to protruding snap action, enhance the attachment force between box culvert, two before and after making
Box culvert can firmly be spelled and be gathered together, effectively solves current box culvert impermeability, Lack of support
Situation.Prefabricated box culvert construction method, box culvert requires prefabricated shaping according to design, and sections quality is easy
Control, and then can effectively ensure service life；Channel excavation uses rectangular aperture cross section, both sides
Soil pressure is resisted with spiral anchor rod by steel plate, compared to trapezoid cross section and conventional anchoring opposing, has
Earth excavation amount is few, quick feature of constructing；The underrun joints cement concrete leveling of groove, the end
The longitudinally disposed H profile steel in both sides, face (together with concreting), every 1m on H profile steel track
Disposing steel wheel, slided along the steel wheel in H profile steel by box culvert by traction machine in the trench, contact rubs
Wiping is converted into rolling friction, compared to conventional incremental launching method, uses manpower and material resources sparingly, and safety is higher；
Brushwork epoxy resin glue between each box culvert, is placed into construction position by traction machine by box culvert, and box culvert is one
Slide on the steel wheel of consecutive, make box culvert two-by-two be close together, then presstressed reinforcing steel is passed through preformed hole
It is more excellent that hole conspires to create entirety, durability and anti-seismic performance；During constructing operation, at the top of two steel plates
Cover cover plate, can travel for pedestrian and vehicle, will not because of construction cause traffic congestion and other
Inconvenience.The construction method of the present invention, can be with rapid construction relative to current incremental launching method, in order to contracting
Casual labourer's phase, it is suitable for the location that the volume of traffic is big, and expenses of labour can be reduced.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the present invention's
Technological means, and can be practiced according to the content of description, below with presently preferred embodiments of the present invention
After describing in detail such as.
Accompanying drawing explanation
Fig. 1 is that prefabricated box culvert quickly positions work progress schematic diagram；
Fig. 2 is the front view of box culvert；
Fig. 3 is the enlarged diagram transporting position bottom box culvert；
Fig. 4 is box culvert A schematic cross-section；
Fig. 5 is box culvert B-section schematic diagram；
Labelling connotation in figure: 1. box culvert, 2. traction machine, 3. moves into mouth, 4. groove, 5.H shaped steel, 6.
Steel wheel, 7. steel plate, 8. covering plate, 9. spiral anchor rod, 10. base plate, 11. reserving holes, 12. grooves,
13. is protruding, 14. half arc holes.
Detailed description of the invention
By further illustrating the technological means and merit that the present invention taked by reaching predetermined goal of the invention
Effect, the prefabricated box culvert that the foundation present invention is proposed and quickly its detailed description of the invention of positioning construction method,
Feature and effect thereof, after describing in detail such as.
Embodiment 1
The prefabricated box culvert of the present invention quick positioning construction method operating process schematic diagram as shown in Figures 1 to 3,
Include box culvert 1, traction machine 2, move into mouth 3, groove 4, H profile steel 5, steel wheel 6, steel plate 7,
Cover multiple ingredients such as plate 8, spiral anchor rod 9, base plate 10 and reserving hole 11.
Wherein box culvert 1 be cross section be the hollow tubular structure of tetragon, two sides that box culvert 1 is relative
It is respectively A face and B face, as shown in Figure 4 and Figure 5, the side in A face is provided with multiple groove
Being provided with multiple protruding 13 on the side in 12, B faces, the position of groove 12 is relative with protruding 13 positions
Should, when adjacent groove 12 is connected with protruding 13, protruding 13 block and in groove 12, effectively
Add attachment force from each other, bearing capacity is higher.Wherein, for the ease of construction and installation,
The space being provided with placement steel wheel 6 parallel to each other on the bottom surface of box culvert 1, places the sky of steel wheel 6
Between be half arc hole 14.Through reserving hole 11 it is respectively arranged with at four drift angles of box culvert 1.
The quick positioning construction method of prefabricated box culvert that the present invention proposes, specifically includes following operating procedure:
Step one, according to specific requirement and the structure chart of design of construction, be prefabricated in the factory box culvert 1, and
And the box culvert 1 prepared is transported to job site, standby.
Step 2, the groove 4 of one square-section of underground excavation on construction ground, then at groove 4
The relative sidewall in two sides on be respectively arranged with steel plate 7, what steel plate 7 was deep is embedded in groove 4 sidewall
In soil, being used for resisting earth lateral pressure, the upper position between two steel plates 7 is provided with Screw Anchor
Bar 9, is used for supporting the steel plate 7 of both sides.
Step 3, on the bottom surface soil body of groove 4, joints cement concrete floor 10 is levelling, and along
Two longitudinal edges of base plate 10 arrange H profile steel 5, form long rails, and at the upper table of H profile steel 5
Face arranges a steel wheel 6 every 1m, for the conveying of box culvert 1.On groove 4 top, two steel plates
The top of 7 is provided with covering plate 8, facilitates pedestrian and vehicle to pass through.
Step 4, has on the top of groove 4 and moves into mouth 3, and prefabricated box culvert 1 is from groove 4 top
Move in the mouth 3 crane track putting into groove 4 slowly, then the rope of traction machine is fastened
In box culvert 1, opening traction machine, traction box culvert 1 slides into construction position in orbit.
Step 5, at the contact surface brushwork epoxy resin glue of each box culvert 1, box culvert 1 passes through when contacting
Epoxide-resin glue is pasted mutually, will through the reserving hole 11 on each box culvert 1 by longitudinal prestressing muscle
Box culvert 1 is fixed into entirety, and reserving hole 11 is arranged near four corner positions of each box culvert 1；
Step 6, removes the steel plate 7 and spiral anchor rod 9 arranged on two side, and backfill soil covers, and completes
Construction.
According to design, box culvert requires that prefabricated shaping, sections quality are easily controlled, and then can effectively protect
Demonstrate,prove service life；Channel excavation uses rectangular aperture cross section, and two lateral earth pressures pass through steel plate and Screw Anchor
Bar is resisted, compared to trapezoid cross section and conventional anchoring opposing, have that earth excavation amount is few, construction quickly
Feature；The underrun joints cement concrete leveling of groove, the longitudinally disposed H profile steel in both sides, bottom surface (with
Concreting is together), H profile steel track disposes steel wheel every 1m, in the trench by leading
Drawing machine to be slided along the steel wheel in H profile steel by box culvert, contact friction is converted into rolling friction, compared to
Conventional incremental launching method, uses manpower and material resources sparingly, and safety is higher；Brushwork epoxy resin glue between each box culvert,
By traction machine, box culvert being placed into construction position, box culvert slides on a series of steel wheel, makes case two-by-two
Culvert is close together, and then by reserving hole, presstressed reinforcing steel is conspired to create entirety, durability and shock resistance
Can be more excellent；During constructing operation, cover cover plate at the top of two steel plates, can be for pedestrian and Che
Travel, traffic congestion and other inconvenience will not be caused because of construction.The construction method phase of the present invention
For current incremental launching method, can be with rapid construction, in order to the reduction of erection time, it is suitable for the location that the volume of traffic is big,
And expenses of labour can be reduced.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any form
On restriction, although the present invention is disclosed above with preferred embodiment, but is not limited to this
Bright, any those skilled in the art, in the range of without departing from technical solution of the present invention, when can
The technology contents utilizing the disclosure above is made a little change or is modified to the Equivalent embodiments of equivalent variations,
In every case it is the content without departing from technical solution of the present invention, implements above according to the technical spirit of the present invention
Any simple modification, equivalent variations and the modification that example is made, all still falls within the model of technical solution of the present invention
In enclosing.
Claims (10)
1. a prefabricated box culvert, it is characterised in that: box culvert (1) be cross section be the hollow tubular of tetragon
Structure, two sides that described box culvert (1) is relative are respectively A face and B face, in described A face
It is provided with multiple groove (12) on side, the side in described B face is provided with multiple projection (13),
The position of described groove (12) is corresponding with protruding (13) position.
Prefabricated box culvert the most according to claim 1, it is characterised in that: at described box culvert (1)
The space being provided with placement steel wheel (6) parallel to each other on bottom surface, the space placing steel wheel (6) is
Half arc hole (14).
Prefabricated box culvert the most according to claim 1, it is characterised in that: at described box culvert (1)
Being respectively arranged with reserving hole (11) at four drift angles, described reserving hole (11) is through hole.
Prefabricated box culvert the most according to claim 2, it is characterised in that: described half arc hole (14)
Size more than the size of described steel wheel (6).
5. the quick positioning construction method of prefabricated box culvert, it is characterised in that: include following operating procedure,
Step one, is prefabricated in the factory box culvert (1) according to construction requirement, and transports job site；
Step 2, the on construction ground groove (4) of one square-section of underground excavation, at described groove
(4) steel plate (7) is set on two side；
Step 3, arranges base plate (10) in the bottom surface of described groove (4), and along described base plate (10)
Dual-side longitudinally on be respectively provided with H profile steel (5), form long rails, in H profile steel (5)
Upper surface is provided with multiple steel wheel (6) uniformly；
Step 4, the top of described groove (4) is provided with moves into mouth (3), by box culvert (1) from removing
Entrance (3) is placed on described long rails, is transported one by one by described box culvert (1) by traction machine (2)
It is passed to position of constructing；
Step 5, at the contact surface brushwork epoxy resin glue of each box culvert (1), described box culvert (1)
Pasted mutually by epoxide-resin glue during contact, passed on each box culvert (1) by longitudinal prestressing muscle
Described box culvert (1) is fixed into entirety by reserving hole (11)；
Step 6, removes the steel plate (7) arranged on two side, and backfill soil covers, and completes construction.
The quick positioning construction method of prefabricated box culvert the most according to claim 5, it is characterised in that:
Between the steel plate (7) arranged on described groove (4) two side, spiral anchor rod (9) is installed, supports
Described steel plate (7).
7. according to the quick positioning construction method of the prefabricated box culvert described in claim 5 or 6, it is characterised in that:
Two pieces of described steel plate (7) end faces are provided with covering plate (8).
The quick positioning construction method of prefabricated box culvert the most according to claim 5, it is characterised in that: institute
Stating in step 3, the base plate (10) arranged in the bottom surface of described groove (4) is cement concrete constructions.
The quick positioning construction method of prefabricated box culvert the most according to claim 5, it is characterised in that:
The upper surface of described H profile steel (5) arranges a steel wheel (6) every 0.2～2m.
The quick positioning construction method of prefabricated box culvert the most according to claim 6, it is characterised in that:
Described spiral anchor rod (9) was removed before backfill soil covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272904.9A CN105908639B (en) | 2016-04-27 | 2016-04-27 | Prefabricated box culvert and rapid positioning construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272904.9A CN105908639B (en) | 2016-04-27 | 2016-04-27 | Prefabricated box culvert and rapid positioning construction method |
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| Publication Number | Publication Date |
|---|---|
| CN105908639A true CN105908639A (en) | 2016-08-31 |
| CN105908639B CN105908639B (en) | 2018-01-12 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702916A (en) * | 2017-02-03 | 2017-05-24 | 中交第二公路勘察设计研究院有限公司 | U-shaped assembly type reinforced concrete cover board culvert and construction method thereof |
| CN107701197A (en) * | 2017-10-23 | 2018-02-16 | 中铁二十四局集团有限公司 | A kind of box culvert toter for incremental launching construction |
| CN108330852A (en) * | 2018-04-16 | 2018-07-27 | 长沙理工大学 | A kind of device and method suitable for the construction of slab culvert wall body shifting formwork |
| CN109578017A (en) * | 2018-12-28 | 2019-04-05 | 中国电建集团贵阳勘测设计研究院有限公司 | Quick lining structure of extra-long small-section hydraulic tunnel and construction method thereof |
| CN110029599A (en) * | 2019-05-17 | 2019-07-19 | 苏交科集团股份有限公司 | Steel connecting structure of prefabricated culvert and construction method |
| CN110747762A (en) * | 2019-08-13 | 2020-02-04 | 贾殿录 | Cement member crossing highway and its installation method |
| CN110821508A (en) * | 2019-12-09 | 2020-02-21 | 长安大学 | Rock mining device and method for penetrating through surrounding rock of broken zone |
| CN111877197A (en) * | 2020-08-05 | 2020-11-03 | 西安建工市政交通集团有限公司 | Cast-in-place box culvert jacking structure and construction method |
| CN114991030A (en) * | 2022-05-20 | 2022-09-02 | 苏交科集团检测认证有限公司 | Accurate space positioning system and method for prefabricated box culvert |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106702916A (en) * | 2017-02-03 | 2017-05-24 | 中交第二公路勘察设计研究院有限公司 | U-shaped assembly type reinforced concrete cover board culvert and construction method thereof |
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| CN107701197B (en) * | 2017-10-23 | 2019-02-01 | 中铁二十四局集团有限公司 | A kind of box culvert toter for incremental launching construction |
| CN108330852A (en) * | 2018-04-16 | 2018-07-27 | 长沙理工大学 | A kind of device and method suitable for the construction of slab culvert wall body shifting formwork |
| CN109578017A (en) * | 2018-12-28 | 2019-04-05 | 中国电建集团贵阳勘测设计研究院有限公司 | Quick lining structure of extra-long small-section hydraulic tunnel and construction method thereof |
| CN110029599A (en) * | 2019-05-17 | 2019-07-19 | 苏交科集团股份有限公司 | Steel connecting structure of prefabricated culvert and construction method |
| CN110029599B (en) * | 2019-05-17 | 2024-01-30 | 苏交科集团股份有限公司 | Prefabricated culvert steel connection structure and construction method |
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| CN110821508A (en) * | 2019-12-09 | 2020-02-21 | 长安大学 | Rock mining device and method for penetrating through surrounding rock of broken zone |
| CN111877197A (en) * | 2020-08-05 | 2020-11-03 | 西安建工市政交通集团有限公司 | Cast-in-place box culvert jacking structure and construction method |
| CN114991030A (en) * | 2022-05-20 | 2022-09-02 | 苏交科集团检测认证有限公司 | Accurate space positioning system and method for prefabricated box culvert |
| CN114991030B (en) * | 2022-05-20 | 2024-03-29 | 苏交科集团检测认证有限公司 | Accurate space positioning system and method for prefabricated box culvert |
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Inventor after: Zhang Jiandong Inventor after: Chen Zhiming Inventor after: Zhao Xuxiang Inventor after: Jia Peng Inventor after: Liu Duo Inventor after: Chen Xiong Inventor before: Zhang Jiandong Inventor before: Cao Jianzhong Inventor before: Chen Xiong Inventor before: Chen Zhiming Inventor before: Liu Duo Inventor before: Zhao Xuxiang Inventor before: Li Guangcheng |