CN116905810A - Novel post-pouring constructional column construction template and construction method - Google Patents
Novel post-pouring constructional column construction template and construction method Download PDFInfo
- Publication number
- CN116905810A CN116905810A CN202310937860.7A CN202310937860A CN116905810A CN 116905810 A CN116905810 A CN 116905810A CN 202310937860 A CN202310937860 A CN 202310937860A CN 116905810 A CN116905810 A CN 116905810A
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- formwork
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- constructional column
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- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
- E04G17/0657—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts fully recoverable
-
- 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
-
- 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
- E04G9/00—Forming or shuttering elements for general use
- E04G9/02—Forming boards or similar elements
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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
本发明提供一种新型后浇构造柱的施工模板及施工方法，所述施工模板包括可调模板，所述可调模板两端开口、内部中空，其包括间隔设置的模板一和模板二；夹具，所述夹具设于所述可调模板的外侧，与所述模板一转动连接。利用本发明浇筑构造柱，于上层楼板顶部预留构造柱的浇筑孔，不仅为预埋钢筋提供通道，代替后植筋方案，可保证施工完成的砌体的整体性和稳定性；改变了构造柱浇筑孔的方向，使得震动棒可以伸入构造柱模板中进行振捣，保证构造柱的密实度；浇筑的构造柱顶连上层楼板，底接下层楼板，与楼板之间无缝隙需要封堵，避免了人工填缝效率低、填缝处密实度难保证的问题。
The invention provides a new type of construction formwork for post-cast structural columns and a construction method. The construction formwork includes an adjustable formwork. The adjustable formwork is open at both ends and hollow inside. It includes a formwork one and a formwork two arranged at intervals; a clamp. , the clamp is arranged on the outside of the adjustable template and is rotationally connected to the template. The present invention is used to pour structural columns, and the pouring holes of the structural columns are reserved at the top of the upper floor. This not only provides channels for embedded steel bars, but also replaces the post-planting reinforcement scheme and ensures the integrity and stability of the completed masonry; changing the structure The direction of the column pouring hole allows the vibrator to extend into the structural column formwork for vibration to ensure the compactness of the structural column; the top of the poured structural column is connected to the upper floor slab, and the bottom is connected to the lower floor slab, and there is no gap between the structural column and the floor slab that needs to be sealed. , avoiding the problems of low efficiency of manual filling and difficulty in ensuring the density of the filling.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a novel post-pouring constructional column construction template and a construction method.
Background
According to masonry construction standard requirements, constructional columns are required to be laid when the wall length exceeds 5m or the door hole exceeds 2.1 m. The constructional column plays a very important role in the masonry structure, and the combined ring beam can play a role in enhancing the integrity and stability of the building.
The construction process of the constructional column comprises binding reinforcing steel bars, building walls, supporting forms, pouring concrete, removing forms and the like. Because the upper floor slab is poured before the constructional column, the method of post-planting of the steel bars is generally adopted for binding the steel bars during construction of the constructional column, and two ends of the steel bars are connected with the top surface of the lower floor slab and the beams below the upper floor slab; and then, an opening is reserved on the side surface of the top of the constructional column template for pouring concrete, and a gap between the top of the constructional column and the upper floor plate is plugged after the mould is removed.
The construction method has the following defects:
(1) The process requirements of post-reinforcement are that positioning, punching, hole cleaning, glue distribution and reinforcement implantation are complicated in construction flow, the quality of reinforcement implantation glue and the construction quality of reinforcement implantation greatly influence the integrity and stability of a masonry structure, and the one-time construction qualification rate is far less than that of a method for embedding reinforcement.
(2) When the constructional column is used for supporting the formwork, pouring ports can be formed in the side faces of the formwork, vibration can not be performed by using a vibration rod after concrete is poured, vibration can only be performed by beating the formwork, and compactness of the constructional column can not be guaranteed.
(3) After the constructional column is disassembled, the distance between the top of the constructional column and the upper floor is too small, and the constructional column can be plugged only by adopting a manual caulking method, so that the efficiency is low, and the compactness of the top concrete is difficult to ensure.
Disclosure of Invention
The invention aims to provide a novel post-cast constructional column construction template and a construction method thereof, which are used for solving the problems in the background.
The first object of the present invention is to provide a novel post-cast construction column construction form comprising:
the adjustable template comprises a first template and a second template which are arranged at intervals, wherein two ends of the adjustable template are open, and the interior of the adjustable template is hollow;
and the clamp is arranged on the outer side of the adjustable template and is rotationally connected with the template.
Furthermore, the adjustable template is wide in top and narrow in bottom, and the second template is in sliding connection with the first template.
Further, a sliding groove is formed in the side face, away from the clamp, of the first template, the bottom end of the sliding groove is higher than the bottom end of the first template, sliding strips are arranged at the two ends of the second template, and the sliding strips are matched with the sliding groove in shape.
Further, the clamp is C-shaped, and the opening end of the clamp faces away from the first template.
Further, the bottom of the clamp is provided with a connecting part, the bottom of the connecting part is provided with a rotating supporting part, and the other end of the rotating supporting part is connected with the first template.
Further, the rotation supporting portion comprises a first supporting rod and a second supporting rod, and the connecting portion, the first supporting rod, the second supporting rod and the first template are sequentially connected in a rotation mode.
Further, a sliding rod is arranged at the bottom of the first template, a sliding sleeve is sleeved on the sliding rod, the sliding rod is in sliding connection with the sliding sleeve and is fixed through a locking piece, and the second supporting rod is rotationally connected with the outer wall of the sliding sleeve.
Further, a strip-shaped through hole is formed in the sliding rod, a mounting hole is formed in the sliding sleeve, and the locking piece penetrates through the mounting hole and the strip-shaped through hole.
A second object of the present invention is to provide a method of construction using a construction form of a novel post-cast constructional column as described above, comprising the steps of:
s1, laying a bottom die of an upper floor slab, and reserving an installation channel of the construction template;
s2, installing the clamp at the installation channel and connecting the clamp with the bottom die;
s3, judging the section size of a top pouring hole according to the number of constructional columns and the distribution condition of the constructional columns at the bottom of the upper floor, rotating the first template and installing the second template;
s4, pouring an upper floor slab, removing the construction template, building a filling wall below the upper floor slab, and reserving a formwork supporting channel of the constructional column in the filling wall;
s5, penetrating the vertical steel bars of the constructional column through the top pouring holes, and binding the transverse steel bars;
s6, pouring the constructional column;
s7, plugging the top pouring hole.
Further, in the step S7, the concrete label of the top pouring hole is higher than the concrete label of the upper floor.
The invention has the beneficial effects that:
(1) The top pouring holes of the constructional columns are reserved at the top of the upper floor slab, so that a channel is provided for embedded bars, a post-reinforcement planting scheme is replaced, and the integrity and stability of the masonry after construction is finished can be ensured;
(2) The direction of the pouring hole of the constructional column is changed, so that the vibration rod can extend into the constructional column template to vibrate, and the compactness of the constructional column is ensured;
(3) The top of the poured constructional column is connected with the upper floor slab, the bottom of the poured constructional column is connected with the lower floor slab, and the gap between the poured constructional column and the floor slab is required to be blocked, so that the problems of low manual gap filling efficiency and difficult guarantee of the compactness of a gap filling part are avoided.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a block diagram of an adjustable template in an embodiment of the invention;
FIG. 3 is a schematic diagram showing the connection of a first stay and a second stay in an embodiment of the present invention;
FIG. 4 is a schematic view of a sliding rod and a sliding sleeve according to an embodiment of the present invention;
FIG. 5 is a front cross-sectional view of an embodiment of the invention in use;
FIG. 6 is a schematic view of an embodiment of the present invention after use and separated from an upper floor;
fig. 7 is a front cross-sectional view of a post casting post after use according to an embodiment of the present invention.
In the figure:
1. an adjustable template; 1a, a first template; 1b, a second template; 1c, a chute; 1d, a sliding bar;
2. a clamp;
3. a connection part;
4. a rotation support part; 4a, stay bar I; 4b, a second stay bar;
5. a connecting ring;
6. a connecting plate;
7. a bolt;
8. a slide bar; 8a, strip-shaped through holes
9. A sliding sleeve; 9a, mounting hole
10. A locking piece.
11. Constructing a column;
12. an upper floor slab;
13. a bottom die; 13a, mounting channels;
14. filling a wall; 14a, formwork supporting channels;
15. vertical steel bars;
16. transverse steel bars;
17. and pouring holes at the top.
Detailed Description
The following describes the technical scheme of the embodiment of the present invention in detail through the attached drawings.
In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Referring to fig. 1-2, a novel post-cast construction column construction form comprises: the adjustable template 1 and the clamp 2 are provided with openings at two ends of the adjustable template 1 and hollow inside, and the adjustable template comprises a first template 1a and a second template 1b which are arranged at intervals; the clamp 2 is arranged on the outer side of the adjustable template 1 and is connected with the first template 1a in a rotating way.
Referring to fig. 5-7, the steps of casting construction of the constructional column by using the construction template include:
(1) Calculating the top surface size and the bottom surface size of the top pouring hole 17 according to the preset size of the constructional column 11;
(2) A bottom die 13 of an upper floor 12 is arranged, and a mounting channel 13a is reserved according to the bottom surface size and the thickness of the clamp 2 in the step (1);
(3) Installing the clamp 2 at the installation channel 13a of the bottom die 13 of the upper floor slab 12, adjusting the adjustable template 1 according to the thickness of the upper floor slab 12, and adjusting the adjustable template to meet the top surface size in the step (1) after pouring the upper floor slab 12, wherein the top pouring hole 17 formed by separating the construction template from the upper floor slab 12 is consistent with the top surface size in the step (1);
(4) After the upper floor 12 is poured, the construction template is removed, a filling wall 14 between the upper floor 12 and the lower floor is built, and a formwork supporting channel 14a of a constructional column 11 is reserved in the filling wall 14;
(5) Binding reinforcing steel bars: penetrating the vertical steel bars 15 through the top pouring holes 17 on the upper floor slab 12, and binding the transverse steel bars 16 on the vertical steel bars 15;
(6) Pouring and vibrating the concrete of the constructional column 11 at the top pouring hole 17; the top casting holes 17 are plugged with concrete that is higher than the upper floor 12.
By adopting the technical scheme, the pouring holes of the constructional column 11 are reserved at the top of the upper floor plate 12, so that a channel is provided for embedded bars, the post-reinforcement planting scheme is replaced, and the integrity and stability of the masonry after construction are ensured; the direction of pouring holes of the constructional column 11 is changed, so that the vibrating rod can extend into the template of the constructional column 11 to vibrate, and the compactness of the constructional column 11 is ensured; and moreover, the top of the poured constructional column 11 is connected with the upper floor slab 12, the bottom is connected with the lower floor slab, and a gap between the lower floor slab and the floor slab is required to be blocked, so that the problems of low manual gap filling efficiency and difficult guarantee of the compactness of a gap filling part are avoided.
In order to facilitate pouring of the constructional column 11, the adjustable formwork 1 is in a shape with a wide top and a narrow bottom, and concrete is convenient to fall into a side mould of the constructional column 11 along the adjustable formwork 1. In this embodiment, the adjustable template 1 is configured as two templates 1a and two templates 1b that are slidably connected, the templates 1a are disposed opposite to each other, and two ends of the template 1b are respectively connected to one template 1a.
In the above construction steps (1) to (3), in order to secure the strength and the integrity of the upper floor 12, the size of the top casting hole 17 is strictly controlled. The bottom surface size of the top pouring hole 17 is matched with the section size of the constructional column 11; the top surface dimensions of the top pouring holes 17 are reasonably planned according to the surface area of the upper floor 12, the number of the constructional columns 11 (the number of the top pouring holes 17 is the same as that of the constructional columns 11), the spacing between the constructional columns 11 and the like, and are actually adjusted by rotating the first template 1a. After the first templates 1a are fixed, the second templates 1b are arranged between the first templates 1a, on one hand, the side surfaces of the space formed by surrounding the first templates 1a and the second templates 1b are closed, so that slurry leakage can be prevented when the upper floor 12 is poured, and on the other hand, the first templates 1a and the second templates 1b are mutually supported, so that the adjustable templates 1 are prevented from being deformed due to extrusion of concrete when the upper floor 12 is poured.
Referring to fig. 2, a side surface of a first template 1a, which is far away from a clamp 2, is provided with a sliding groove 1c, two ends of a second template 1b are provided with sliding strips 1d, and the sliding strips 1d are matched with the sliding groove 1c in shape. The bottom end of the chute 1c is higher than the bottom end of the first template 1a, so as to ensure that the second template 1b cannot slip off the first template 1a due to self gravity, and of course, the first template 1a and the second template 1b are of structures with wide upper part and narrow lower part, have the function of preventing falling off, and supplement each other, so that the adjustable template 1 is more stable.
The cross section size of the top pouring hole 17, the rotation angle of the first templates 1a, the distance between the first templates 1a and the like can be known at a construction site, so that the second templates 1b can be prefabricated into a batch of common and different sizes according to construction experience, use frequency and the like, and can also be cut and manufactured by adopting a wood template at the construction site.
Referring to fig. 1, a clamp 2 is C-shaped, with an open end facing away from a first template 1a, a connecting portion 3 is provided at the bottom of the clamp, a rotation support portion 4 is provided at the bottom of the connecting portion 3, and the other end of the rotation support portion 4 is connected with the first template 1a. During construction, the clamp 2 is placed at the position of the installation channel 13a reserved in the bottom die 13 of the upper floor plate 12, the edge of the bottom die 13 of the upper floor plate 12 is inserted into the clamp 2, the adjustable template 1 can be fixed on the bottom die 13, and the rotary supporting part 4 can support the first template 1a at any angle.
The rotation support part 4 comprises a first stay bar 4a and a second stay bar 4b, and the connecting part 3, the first stay bar 4a, the second stay bar 4b and the first template 1a are sequentially connected in a rotation mode. Referring to fig. 3, the four structures may be provided at their ends with a connecting ring 5 and a connecting plate 6, which are engaged with each other, and the connecting plate 6 is provided at both ends of the connecting ring 5, which are fastened by bolts 7.
As can be seen from the above, the abutting part of the first template 1a and the clamp 2 is the bottom surface of the upper floor 12, so as to adapt to the thickness requirements of different floors, in this embodiment, a sliding rod 8 is arranged at the bottom of the first template 1a, a sliding sleeve 9 is sleeved on the sliding rod 8, the sliding rod 8 is slidably connected with the sliding sleeve 9, and is fixed by a locking member 10, and a supporting rod two 4b is rotatably connected with the outer wall of the sliding sleeve 9. When the floor thickness is large, in order to prevent floor concrete from flowing into the adjustable formwork 1 above the top surface of the first formwork 1a, the sliding rod 8 can slide, and the height of the first formwork 1a is raised, so long as the first formwork 1a and the clamp 2 are always in an abutting state.
In practice, referring to fig. 4, a bar-shaped through hole 8a may be provided on the slide bar 8, a mounting hole 9a may be provided on the slide sleeve 9, and a locking member 10 may penetrate through the mounting hole 9a and the bar-shaped through hole 8a to fix the positions of the slide bar 8 and the slide sleeve 9. The locking member 10 may be a bolt.
The beneficial effects of the invention include: (1) The top pouring holes 17 of the constructional columns 11 are reserved at the top of the upper floor 12, so that a channel is provided for embedded bars, a post-reinforcement planting scheme is replaced, and the integrity and stability of the masonry after construction are ensured; (2) The direction of pouring holes of the constructional column 11 is changed, so that a vibration rod can extend into a template of the constructional column 11 to vibrate, and the compactness of the constructional column 11 is ensured; (3) The top of the poured constructional column 11 is connected with the upper floor slab 12, the bottom is connected with the lower floor slab, and a gap between the lower floor slab and the floor slab is required to be blocked, so that the problems of low manual gap filling efficiency and difficult guarantee of the compactness of a gap filling part are avoided.
The foregoing is a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention and are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The utility model provides a novel post-cast constructional column's construction template which characterized in that includes:
the adjustable template comprises a first template and a second template which are arranged at intervals, wherein two ends of the adjustable template are open, and the interior of the adjustable template is hollow;
and the clamp is arranged on the outer side of the adjustable template and is rotationally connected with the template.
2. The construction formwork for a novel post-cast constructional column according to claim 1, wherein the adjustable formwork is wide in top and narrow in bottom, and the second formwork is in sliding connection with the first formwork.
3. The construction formwork for the novel post-cast constructional column according to claim 2, wherein a sliding groove is formed in the side surface, away from the clamp, of the first formwork, the bottom end of the sliding groove is higher than the bottom end of the first formwork, sliding strips are arranged at the two ends of the second formwork, and the sliding strips are matched with the sliding groove in shape.
4. A construction formwork for a novel post-cast construction column according to any one of claims 1 to 3, wherein the clamp is C-shaped with an open end facing away from the first formwork.
5. The construction formwork for a novel post-cast constructional column according to claim 4, wherein a connecting portion is arranged at the bottom of the clamp, a rotating supporting portion is arranged at the bottom of the connecting portion, and the other end of the rotating supporting portion is connected with the first formwork.
6. The construction form for a new post-cast construction column according to claim 5, wherein the rotation support portion comprises a first stay and a second stay, and the connection portion, the first stay, the second stay, and the first form are sequentially connected in rotation.
7. The construction formwork for the novel post-cast constructional column according to claim 6, wherein a sliding rod is arranged at the bottom of the first formwork, a sliding sleeve is sleeved on the sliding rod, the sliding rod is in sliding connection with the sliding sleeve and is fixed through a locking piece, and the second stay rod is rotationally connected with the outer wall of the sliding sleeve.
8. The construction formwork for the novel post-cast constructional column according to claim 7, wherein the sliding rod is provided with a strip-shaped through hole, the sliding sleeve is provided with a mounting hole, and the locking piece penetrates through the mounting hole and the strip-shaped through hole.
9. A method of construction using the construction form of the novel post-cast construction column according to any one of claims 1 to 8, comprising the steps of:
s1, laying a bottom die of an upper floor slab, and reserving an installation channel of the construction template;
s2, installing the clamp at the installation channel and connecting the clamp with the bottom die;
s3, judging the section size of a top pouring hole according to the number of constructional columns and the distribution condition of the constructional columns at the bottom of the upper floor, rotating the first template and installing the second template;
s4, pouring an upper floor slab, removing the construction template, building a filling wall below the upper floor slab, and reserving a formwork supporting channel of the constructional column in the filling wall;
s5, penetrating the vertical steel bars of the constructional column through the top pouring holes, and binding the transverse steel bars;
s6, pouring the constructional column;
s7, plugging the top pouring hole.
10. The method according to claim 9, wherein in the step S7, the concrete mark for plugging the top casting hole is higher than the concrete mark of the upper floor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310937860.7A CN116905810A (en) | 2023-07-28 | 2023-07-28 | Novel post-pouring constructional column construction template and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310937860.7A CN116905810A (en) | 2023-07-28 | 2023-07-28 | Novel post-pouring constructional column construction template and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116905810A true CN116905810A (en) | 2023-10-20 |
Family
ID=88362781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310937860.7A Pending CN116905810A (en) | 2023-07-28 | 2023-07-28 | Novel post-pouring constructional column construction template and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116905810A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204152206U (en) * | 2014-10-22 | 2015-02-11 | 中建五局上海建设有限公司 | A kind of assembly type floor unwrapping wire hole erecting device |
| CN106567543A (en) * | 2016-10-26 | 2017-04-19 | 上海中锦建设集团股份有限公司 | Slab-bottom structural concrete column reserved hole construction method |
| CN207944705U (en) * | 2018-01-09 | 2018-10-09 | 唐文敏 | A kind of civil engineering building template link |
| CN214942312U (en) * | 2021-03-15 | 2021-11-30 | 至高建设集团有限公司 | Large-plane vertical template structure without rivet fixation |
| CN215252168U (en) * | 2021-08-06 | 2021-12-21 | 中交一公局集团有限公司 | A pavement formwork support |
| CN219280507U (en) * | 2023-02-09 | 2023-06-30 | 中交路桥建设有限公司 | Bridge deck pavement elevation belt elevation control device |
| CN220666960U (en) * | 2023-07-28 | 2024-03-26 | 中冶天工集团有限公司 | Novel post-cast constructional column construction template |
-
2023
- 2023-07-28 CN CN202310937860.7A patent/CN116905810A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204152206U (en) * | 2014-10-22 | 2015-02-11 | 中建五局上海建设有限公司 | A kind of assembly type floor unwrapping wire hole erecting device |
| CN106567543A (en) * | 2016-10-26 | 2017-04-19 | 上海中锦建设集团股份有限公司 | Slab-bottom structural concrete column reserved hole construction method |
| CN207944705U (en) * | 2018-01-09 | 2018-10-09 | 唐文敏 | A kind of civil engineering building template link |
| CN214942312U (en) * | 2021-03-15 | 2021-11-30 | 至高建设集团有限公司 | Large-plane vertical template structure without rivet fixation |
| CN215252168U (en) * | 2021-08-06 | 2021-12-21 | 中交一公局集团有限公司 | A pavement formwork support |
| CN219280507U (en) * | 2023-02-09 | 2023-06-30 | 中交路桥建设有限公司 | Bridge deck pavement elevation belt elevation control device |
| CN220666960U (en) * | 2023-07-28 | 2024-03-26 | 中冶天工集团有限公司 | Novel post-cast constructional column construction template |
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