CN115142683A - A concrete placement instrument for long and thin tubular structure - Google Patents
A concrete placement instrument for long and thin tubular structure Download PDFInfo
- Publication number
- CN115142683A CN115142683A CN202210865145.2A CN202210865145A CN115142683A CN 115142683 A CN115142683 A CN 115142683A CN 202210865145 A CN202210865145 A CN 202210865145A CN 115142683 A CN115142683 A CN 115142683A
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- straight pipe
- concrete
- tubular structure
- telescopic
- funnel
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- 238000005452 bending Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 238000010276 construction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to a concrete pouring tool for a slender tubular structure, which belongs to the technical field of concrete pouring construction and comprises a funnel, wherein the funnel comprises a side plate and a bottom plate, and a circular hole is formed in the center of the bottom plate; the lower part of the round hole is connected with a telescopic straight pipe, the telescopic straight pipe comprises at least two straight pipes which are sleeved inside and outside, the upper part and the lower part of each straight pipe are equal in width, and the outer diameter of each telescopic straight pipe is sequentially reduced from top to bottom, so that each straight pipe can axially slide along the inner wall of the adjacent straight pipe above the straight pipe, and the telescopic straight pipe is telescopic; the tail end of the telescopic straight pipe is connected with a flexible rubber pipe with a set bending radian and used for guiding concrete to be poured to a pouring point. The device provided by the invention is suitable for pouring concrete in a slender tubular structure with a small caliber and a large height, and the pouring device is convenient for pouring concrete, and the concrete can not be grouted, so that the pouring effect is ensured.
Description
Technical Field
The invention belongs to the technical field of construction of a house building descending board area, and particularly relates to a concrete pouring tool for a slender tubular structure.
Background
When the battens are internally supported and reinforced, the heights of the four corners cannot be accurately controlled by adopting a concrete cushion block to adjust the heights; when concrete is poured on the part, the part of the wooden template is easy to tread, so that the height of the part of the wooden template cannot meet the design requirement; and the wood formwork is easy to deform, so that the forming quality of the concrete at the part is poor, and the wood formwork becomes a weak link of quality control. The template is easy to damage the concrete when the template at the position of the falling plate is removed after the pouring is finished, the water seepage phenomenon is easy to occur at the position of the concrete cushion block, and the phenomena of scraping and chiseling the structural concrete when the leveling layer of the toilet is constructed are caused occasionally due to the fact that the toilet has a waterproof requirement, the ground construction method is complex, and the requirement on the flatness is high, so that the material waste and the working hour waste are caused. How to guarantee that this part falls the fine control concrete shaping quality of board position concrete elevation ability and satisfy the waterproof requirement of special position, reduce later stage fitment rework, and can be applicable to not board area of falling of equidimension, be the important technical problem who awaits the solution in building construction template support and concrete placement technical field.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a concrete pouring tool for a slender tubular structure, which is suitable for plate lowering areas with different sizes, can ensure the flatness of templates and concrete in the plate lowering areas, and avoids various quality defects after the templates are removed.
In order to achieve the above purposes, the invention adopts a technical scheme that:
a concrete casting tool for an elongate tubular structure, comprising:
the funnel comprises side plates and a bottom plate, and a circular hole is formed in the center of the bottom plate;
the lower part of the round hole is connected with a telescopic straight pipe, the telescopic straight pipe comprises at least two straight pipes which are sleeved inside and outside, the upper part and the lower part of each straight pipe are equal in width, and the outer diameter of each telescopic straight pipe is sequentially reduced from top to bottom, so that each straight pipe can axially slide along the inner wall of the adjacent straight pipe above the straight pipe, and the telescopic straight pipe is telescopic;
the tail end of the telescopic straight pipe is connected with a flexible rubber pipe with a set bending radian and used for guiding concrete to be poured to a pouring point.
Optionally, the funnel is a square trapezoidal steel funnel structure, and comprises four trapezoidal side plates and a square bottom plate with a round hole formed in the center.
Optionally, in two adjacent upper and lower straight pipes of the telescopic straight pipe, an annular ball slide rail is fixedly arranged at the top end of the lower straight pipe, a plurality of steel balls are arranged in the annular ball slide rail, the steel balls are in contact with the inner wall of the upper straight pipe, and friction and sliding resistance of the lower straight pipe in the up-and-down telescopic sliding process in the upper straight pipe are reduced through the steel balls.
Optionally, in two adjacent straight pipes on the upper and lower sections of the telescopic straight pipe, the upper section of the straight pipe is provided with limiting holes near two sides of the outer wall of the pipe bottom, the limiting holes are connected with lifting bolts, and the position of the lower section of the straight pipe is limited by adjusting the depth of the lifting bolts in the limiting holes.
Optionally, one end of the lifting ring bolt is a lifting ring, the other end of the lifting ring bolt is a stud, and the stud is in threaded connection with the limiting hole.
Optionally, the two sides of the funnel are symmetrically provided with supporting beams, and the supporting beams are fixedly connected with edges of the side plates of the funnel through supporting steel bars.
Optionally, a take-up winch is fixedly arranged on the outer sides of the two support beams, and a rotating handle is arranged on the take-up winch.
Optionally, a steel strand is arranged in the take-up winch, and the steel strand passes through the lifting rings of the lifting bolts on the two sides of each straight pipe and is fixedly connected with the lifting rings of the lifting bolts of the last straight pipe.
Optionally, a rubber scraper is arranged on the upper portion of the annular ball slide rail and used for preventing concrete slurry of the lower straight pipe from entering the annular ball slide rail in the telescopic process.
Optionally, the top ends of the two steel plates opposite to the funnel are provided with lifting lugs, so that the funnel can be conveniently lifted and installed.
The concrete pouring tool for the slender tubular structure provided by the invention has the beneficial effects that:
1. the telescopic straight pipe is connected to the bottom of the funnel, so that the limitation of traditional funnel type auxiliary pouring is solved, the falling height is controlled by adjusting the height of a concrete pouring opening, the impact force of concrete during pouring is reduced, and the segregation phenomenon is avoided;
2. the sliding rail in the telescopic straight pipe is adopted, so that the sliding resistance in the use process is reduced, and the rubber scraper on the upper part of the annular sliding rail prevents concrete slurry and impurities from entering the inside of the sliding rail in the telescopic process to influence the normal use;
3. the lifting ring screws arranged at the bottom of the straight pipe are matched with the limiting holes to connect the upper straight pipe and the lower straight pipe, the adjustment is convenient, the pouring is completed, and the convenient disassembly is used for maintaining, flushing and maintaining the equipment, so that the service life of the equipment can be prolonged.
4. By adopting the flexible hose to be connected with the telescopic straight pipe, when the position above the tubular structure is poured, the flexible hose can be conveniently moved to finish concrete pouring of all directions.
Drawings
FIG. 1 is a schematic overall structure view of a concrete pouring tool for an elongated tubular structure provided in an embodiment;
FIG. 2 is a top view of the tool of FIG. 1;
FIG. 3 is a schematic view of the internal structure of a telescopic straight pipe;
in the figure: the method comprises the following steps of 1-a funnel, 2-a telescopic straight pipe, 3-a take-up winch, 4-a lifting lug, 5-a supporting beam, 6-a supporting steel bar, 7-a steel strand, 8-a limiting hole, 9-a lifting bolt, 10-an annular ball slide rail, 11-a steel ball, 12-a rubber scraping piece, 13-a flexible rubber pipe and 14-a hoop.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention provides a concrete pouring tool for a slender tubular structure, aiming at the problems that in the conventional concrete pouring method in a steel tube, concrete is separated due to overlarge pouring height and strong impact force, internal gas cannot be timely discharged when the concrete is poured too fast to generate air hole quality hidden troubles, and the concrete falls and then is layered due to overhigh steel tube columns.
Referring to fig. 1 to 3, there is provided a concrete pouring tool for an elongated tubular structure, including: funnel 1, scalable straight tube 2, receipts line capstan winch 3, lug 4, a supporting beam 5, support bar 6, steel strand wires 7, spacing hole 8, eye bolt 9, annular ball slide rail 10, steel ball 11, rubber scraper 12, flexible hose 13, clamp 14, wherein:
the funnel 1 comprises side plates and a bottom plate, a round hole is formed in the center of the bottom plate, a telescopic straight pipe 2 is connected below the round hole, the telescopic straight pipe 2 comprises at least two straight pipes which are sleeved inside and outside, the upper part and the lower part of each straight pipe are equal in width, and the outer diameter of the telescopic straight pipe 2 is sequentially reduced from top to bottom, so that each straight pipe can axially slide along the inner wall of the adjacent straight pipe above the straight pipe, and the telescopic straight pipe 2 can stretch; the tail end of the telescopic straight pipe 2 is connected with a flexible rubber pipe 13 with a set bending radian and used for guiding concrete to be poured to a pouring point.
In a specific embodiment, the funnel 1 is a square trapezoidal steel funnel structure, which is mainly composed of four trapezoidal steel side plates and a square steel bottom plate with a round hole in the center. In a specific embodiment, the material of the funnel 1 is a Q235 steel plate with the thickness of 10mm, the long side of the steel side plate is 500mm, the short side is 200mm, and the height is 350mm; the size of the steel bottom plate is 200mm multiplied by 200mm, and a round hole with phi 150mm is arranged in the center.
The telescopic straight pipe 2 comprises at least two steel straight pipes which are sleeved inside and outside, a first straight pipe, a second straight pipe, a funnel 1, a 8230, a Nth straight pipe and a round hole, wherein the first straight pipe, the second straight pipe and the 8230are sequentially arranged from top to bottom, the upper end of the first straight pipe is connected with the round hole of the funnel 1, the upper part and the lower part of each straight pipe are as wide as each other, and the outer diameter of the telescopic straight pipe 2 is sequentially reduced from top to bottom, so that each straight pipe except the first straight pipe can axially slide along the inner wall of the adjacent straight pipe above, the length of the telescopic straight pipe 2 can be adjusted, the falling height of concrete is effectively controlled, the impact force on a template during concrete pouring is reduced, and the phenomenon of concrete segregation is avoided.
In a specific embodiment, the length of each straight pipe is lm to 1.5m, the diameter is 100 to 150mm, and the thickness is 3mm; in the upper and lower adjacent straight pipes, the diameter of the upper straight pipe is 7mm larger than that of the lower straight pipe.
In a specific embodiment, of two adjacent straight pipes, an annular ball slide rail 10 is fixedly arranged at the top of the lower straight pipe, a plurality of steel balls 11 are arranged in the annular ball slide rail 10, and the steel balls 11 are in contact with the inner wall of the upper straight pipe. The ball slide rail structure can reduce the friction and the sliding resistance of the lower straight pipe in the up-down telescopic sliding process of the upper straight pipe.
In a specific embodiment, in two adjacent upper and lower straight pipes, two sides of the upper straight pipe close to the outer wall of the pipe bottom are provided with threaded limiting holes 8, lifting bolts 9 are connected in the limiting holes 8, one ends of the lifting bolts 9 are lifting rings, the other ends of the lifting bolts 9 are studs, and the positions of the lower straight pipes are limited by adjusting the depths of the studs of the lifting bolts 9 in the limiting holes 8. Specifically, the lifting eye bolt 9 is screwed into the limit hole 8, so that the tail end of the lifting eye bolt extends out of the inner wall of the upper straight pipe, and therefore the lifting eye bolt 9 can limit the lower straight pipe at the lowest position of the upper straight pipe without slipping out, and plays a role in bearing the weight of the lower straight pipe; the upper and lower two adjacent straight pipes are disassembled by screwing out the lifting eye bolt 9, so that the cleaning and maintenance after the pouring are convenient, and the service life of the pouring tool is prolonged.
In a specific embodiment, a rubber scraper 12 is disposed on the upper portion of the annular ball-sliding track 10 to prevent the concrete slurry from entering the interior of the annular ball-sliding track 10 during the extension and retraction of the lower straight pipe, thereby affecting the normal use.
The tail end of the telescopic straight pipe 2 is connected with a flexible rubber pipe 13 and fixed through a hoop 14. The flexible rubber tube 13 has a certain bending radian, so that the guiding effect is achieved in the pouring process, the concrete can be prevented from being grouted to generate layering, and the pouring effect is guaranteed.
1 bilateral symmetry of funnel is provided with a supporting beam 5, realizes fixed connection through supporting bar 6 between a supporting beam 5 and each curb plate edge of funnel 1. In a specific embodiment, the supporting beams 5 are two phi 25mm steel bars symmetrically arranged on two sides of the funnel 1, fixedly connected with edges of each side plate of the funnel 1 through the phi 20mm supporting steel bars 6, and welded on the surfaces of the edges of the funnel 1 by adopting four corners of angle steel.
A take-up winch 3 is fixedly arranged on the outer sides of the two supporting beams 5, a rotating handle is arranged on the take-up winch 3, a steel strand 7 is arranged in the take-up winch 3, and the steel strand 7 penetrates through hanging rings of the hanging ring bolts 9 on the two sides of the outer side of each straight pipe and is fixedly connected with the hanging rings of the hanging ring bolts 9 of the tail straight pipe. The handle is rotated to control the contraction of the steel strand 7 so as to control the lifting of the limiting hole 8, so that the telescopic straight pipe 2 is telescopic, the height of a pouring opening is adjusted, and the concrete pouring quality is guaranteed.
In a specific embodiment, lifting lugs 4 are arranged at the top ends of two opposite steel plates of the hopper 1, so that the hopper 1 can be conveniently lifted and installed.
In one embodiment, the aperture of the funnel 1 and the flexible hose 13 is determined according to the concrete contact surface size of the slender tubular structure; the length of the hose 13 is determined according to the actual situation of the field, and the flexible hose 13 is used for blanking, so that the operation is flexible and convenient.
The concrete pouring tool for the elongated tubular structure comprises the following working procedures:
s1, hoisting the pouring tool to the top surface of a steel column to be poured with concrete by using a truck crane through lifting lugs 4 welded on two sides of a funnel 1, then erecting the pouring tool on the steel column through a support beam 5, and penetrating a telescopic straight pipe 2 and a flexible rubber pipe 13 into the steel column from the upper end of the steel column;
s2, aligning a discharge pipe opening of the cement pump truck or the concrete tank with a hopper feed inlet of the pouring tool, conveying fluid concrete into the hopper, enabling the fluid concrete to pass through the hopper 1, the telescopic straight pipe 2 and the flexible rubber pipe 13 until a pouring point, and injecting the fluid concrete into a steel column of a slender tubular structure;
s3, in the pouring process, the length of the telescopic straight pipe 2 is adjusted by controlling the contraction of the steel strands 7 through rotating the handle according to the pouring condition, so that the height of a concrete pouring opening is adjusted, the impact force in the concrete pouring process is relieved, the phenomenon of uneven internal blanking can be reduced in the concrete pouring process, and the phenomena of cavities, holes, fault bubbles and the like are avoided;
and S4, after the pouring is finished, hoisting the pouring tool to the next elongated tubular structure to be poured by using a truck crane, and performing subsequent pouring work.
The concrete pouring tool for the elongated tubular structure, provided by the invention, provides a buffering platform for the fluid concrete, can effectively avoid concrete overflow, and ensures that the concrete cannot be separated due to overlarge height during pouring; the height of the pouring opening is controlled through the telescopic straight pipe, so that gas is discharged from the guide pipe in the concrete pouring process, and the phenomena of cavities, holes, fault bubbles and the like are avoided. The pouring device provided by the invention is used for pouring the concrete with the elongated tubular structure, so that the pouring quality of the concrete with the elongated tubular structure can be improved, and the construction efficiency can be accelerated.
The invention provides a concrete pouring tool for a slender tubular structure, which aims at the problems that the elevation of a hanging die and the flatness of concrete cannot meet the requirements and the hanging die cannot be suitable for a more-size board-falling area through adjustment due to the fact that the wooden hanging die in the board-falling area is easy to tread, a template device is prefabricated, all prefabricated corner boards are vertically combined and assembled through bolts and nuts, the inner sides of the corner boards are connected through supporting rods, a prefabricated lifting support which can be adjusted in a lifting mode and is provided with reserved bolt holes is drilled and installed on a floor bottom template, the combined and assembled corner boards are assembled with the prefabricated support through the bolts which are longer than the longitudinal height of the template, and the combined corner boards can be lifted and leveled by rotating a rotating screw in the lifting support and observing horizontal bubbles at the tops of the corner boards. The device greatly ensures that the elevation and the concrete flatness of the template device meet the requirements, improves the stability of the template device, improves the applicability of the template device, and is suitable for more descending plate areas with different sizes.
The above-described embodiments are merely illustrative of the present invention and are not intended to be all embodiments. The present invention may be embodied in other specific forms or forms without departing from its spirit or essential characteristics. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention should be indicated by the appended claims, and any changes that are equivalent to the intent and scope of the claims should be construed to be included therein.
Claims (10)
1. A concrete pouring tool for an elongate tubular structure, comprising:
the funnel comprises side plates and a bottom plate, and a circular hole is formed in the center of the bottom plate;
a telescopic straight pipe is connected below the round hole and comprises at least two straight pipes which are sleeved inside and outside, each straight pipe is equal in width from top to bottom, and the outer diameters of the telescopic straight pipes are sequentially reduced from top to bottom;
the tail end of the telescopic straight pipe is connected with a flexible rubber pipe with a set bending radian and used for guiding concrete to be poured to a pouring point.
2. The concrete pouring tool for an elongated tubular structure according to claim 1, wherein said funnel is a square trapezoidal steel funnel structure comprising four trapezoidal side plates and a square bottom plate with a circular hole in the center.
3. A concrete pouring tool for an elongated tubular structure as recited in claim 1, wherein an annular ball slide rail is fixedly disposed at the top end of the lower straight tube of the two adjacent upper and lower straight tubes of said telescopic straight tube, and a plurality of steel balls are disposed in said annular ball slide rail and contact with the inner wall of the upper straight tube.
4. The concrete pouring tool for the slender tubular structure according to claim 3, wherein in the upper and lower adjacent straight pipes of the telescopic straight pipe, the upper straight pipe is provided with limiting holes at two sides close to the outer wall of the pipe bottom, and the limiting holes are connected with the eye bolts.
5. A concrete pouring tool for an elongated tubular structure according to claim 4 wherein said eye bolt has an eye at one end and a stud at the other end, said stud being threadedly connected to said stop hole.
6. The concrete pouring tool for an elongated tubular structure according to claim 5, wherein support beams are symmetrically arranged on both sides of the funnel, and the support beams are fixedly connected with edges of each side plate of the funnel through support steel bars.
7. A concrete pouring tool for an elongated tubular structure according to claim 6 wherein a take-up winch is fixedly disposed outboard of both of said support beams, said take-up winch having a turning handle disposed thereon.
8. The concrete pouring tool for the elongated tubular structure as recited in claim 7, wherein the take-up winch is internally provided with a steel strand which passes through the eye ring of the eye bolt on both outer sides of each straight pipe and is fixedly connected with the eye ring of the eye bolt of the last straight pipe.
9. A concrete pouring tool for elongated tubular structures according to claim 3 wherein said endless ball tracks are provided at their upper portions with rubber wipers.
10. The concrete pouring tool for an elongated tubular structure according to claim 1, wherein the two opposite steel plate top ends of the funnel are provided with lifting lugs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865145.2A CN115142683A (en) | 2022-07-21 | 2022-07-21 | A concrete placement instrument for long and thin tubular structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865145.2A CN115142683A (en) | 2022-07-21 | 2022-07-21 | A concrete placement instrument for long and thin tubular structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115142683A true CN115142683A (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210865145.2A Pending CN115142683A (en) | 2022-07-21 | 2022-07-21 | A concrete placement instrument for long and thin tubular structure |
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| CN (1) | CN115142683A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005200849A (en) * | 2004-01-13 | 2005-07-28 | Penta Ocean Constr Co Ltd | Method and device for filling concrete in concrete filled steel pipe column |
| CN106369023A (en) * | 2016-10-11 | 2017-02-01 | 褚月法 | Extension rod |
| CN110700264A (en) * | 2019-11-12 | 2020-01-17 | 湖北水总水利水电建设股份有限公司 | Fishbone string barrel suitable for deep foundation pit concrete warehousing pouring |
| CN212105160U (en) * | 2020-03-17 | 2020-12-08 | 北京建工集团有限责任公司 | Funnel with telescopic conduit |
| CN215254658U (en) * | 2021-01-08 | 2021-12-21 | 莆田中建建设发展有限公司 | Auxiliary device for large-volume concrete pouring |
-
2022
- 2022-07-21 CN CN202210865145.2A patent/CN115142683A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005200849A (en) * | 2004-01-13 | 2005-07-28 | Penta Ocean Constr Co Ltd | Method and device for filling concrete in concrete filled steel pipe column |
| CN106369023A (en) * | 2016-10-11 | 2017-02-01 | 褚月法 | Extension rod |
| CN110700264A (en) * | 2019-11-12 | 2020-01-17 | 湖北水总水利水电建设股份有限公司 | Fishbone string barrel suitable for deep foundation pit concrete warehousing pouring |
| CN212105160U (en) * | 2020-03-17 | 2020-12-08 | 北京建工集团有限责任公司 | Funnel with telescopic conduit |
| CN215254658U (en) * | 2021-01-08 | 2021-12-21 | 莆田中建建设发展有限公司 | Auxiliary device for large-volume concrete pouring |
Non-Patent Citations (2)
| Title |
|---|
| 张忠等: "《主体结构工程施工》", 30 June 2005, 中国地质大学出版社, pages: 249 - 251 * |
| 李立权: "《实用钢筋混凝土工艺学》", 30 September 1988, 中国建筑工业出版社, pages: 188 - 190 * |
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