CN214658863U - Long inclined plane fair-faced concrete formwork support system with inclination angle larger than 45 degrees - Google Patents
Long inclined plane fair-faced concrete formwork support system with inclination angle larger than 45 degrees Download PDFInfo
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- CN214658863U CN214658863U CN202022566870.9U CN202022566870U CN214658863U CN 214658863 U CN214658863 U CN 214658863U CN 202022566870 U CN202022566870 U CN 202022566870U CN 214658863 U CN214658863 U CN 214658863U
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Abstract
The utility model discloses a long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 degrees, which comprises a formwork support (7), an inclined joist (8), a pre-embedded structure, a support piece, an inclined support (11) and a formwork support frame; the embedded structure is arranged at the rear part of the bottom of the long inclined plane fair-faced concrete template, the lower ends of a plurality of inclined joists are arranged on the embedded structure, and the upper surface of each inclined joists and the long inclined plane fair-faced concrete template are fixedly connected through a plurality of template supports, so that the plurality of inclined joists are supported at the rear lower part of the long inclined plane fair-faced concrete template in parallel; the lower surface of the inclined joist is movably connected with a plurality of inclined struts through supporting pieces, and the inclined struts are parallel to each other and are arranged on a foundation (21); the formwork support frame is fixedly erected on the foundation, and the inclined support is intersected with the formwork support frame and connected at the intersected position. The utility model discloses can reduce the template and support the construction degree of difficulty, avoid every section concrete placement the wrong platform phenomenon of appearance, guarantee long inclined plane clear water template roughness and in the same direction as the straightness.
Description
Technical Field
The utility model relates to a building structure template support system especially relates to a long inclined plane clear water concrete template support system that inclination is greater than 45.
Background
With the development of economic technology, the elements of the fair-faced concrete are widely applied in the field of building design, and the shape of the fair-faced concrete is more and more diversified, for example, the fair-faced concrete with a long inclined plane and the like, the fair-faced concrete with the long inclined plane in the prior art has the following problems during pouring:
1. the long-inclined-plane fair-faced concrete is difficult to pour at one time, and horizontal construction joints need to be reasonably divided according to structural characteristics and characteristics of the fair-faced concrete, and the pouring is carried out in sections. Due to the fact that concrete is poured for multiple times and the spanning time is long, angle control of the formwork support frames erected in sections is difficult, especially when the inclination angle of the fair-faced concrete with the long inclined plane is larger than 45 degrees, the horizontal force of the support system is larger than the vertical force, and the overall stability is poor.
2. The counter-pulling screw hole of the fair-faced concrete with the long inclined plane is one of important elements for surface impression, and the long inclined plane template supporting system synchronously installed with the long inclined plane template in a segmented mode can influence smooth installation of the counter-pulling screw bolt.
3. Because the bare concrete with the long inclined plane is poured in sections, the interval between the first section of template installation and the last section of template installation is longer, and when the later-stage concrete is poured, the template of the concrete which reaches the design strength in the earlier stage is inconvenient to dismantle.
Disclosure of Invention
An object of the utility model is to provide a long inclined plane clear water concrete form support system that inclination is greater than 45 can reduce the template and support the construction degree of difficulty, avoids every section concreting the wrong platform phenomenon to appear, guarantees long inclined plane clear water form roughness and in the same direction as the straightness accuracy.
The utility model discloses a realize like this:
a long inclined plane fair-faced concrete formwork support system with an inclination angle larger than 45 degrees comprises a formwork support, an inclined joist, a pre-embedded structure, a support piece, an inclined support and a formwork support frame; the embedded structure is arranged at the rear part of the bottom of the long inclined plane fair-faced concrete template, the lower ends of a plurality of inclined joists are respectively and fixedly arranged on the embedded structure, and the upper surface of each inclined joists and the long inclined plane fair-faced concrete template are fixedly connected through a plurality of template supports, so that the inclined joists are supported behind and below the long inclined plane fair-faced concrete template in parallel; the lower surface of each inclined joist is movably connected with a plurality of inclined struts through supporting pieces, the inclined direction of each inclined joist is opposite to that of each inclined strut, and the inclined struts are parallel to each other and fixedly arranged on a foundation so that the inclined struts form a supporting structure of the inclined joists; the formwork support frame is fixedly erected on the foundation, and the inclined support is intersected with the formwork support frame and fixedly connected at the intersected position.
The embedded structure comprises an embedded part and an embedded part foundation beam; the embedded part foundation beam is arranged along the width direction of the bottom of the long-inclined-plane fair-faced concrete, the embedded part is embedded in the embedded part foundation beam, and the lower end of the inclined joist is welded and fixed with the embedded part.
The supporting piece comprises a short column and a jacking; one end of the jacking support is matched and sleeved at the top of the inclined support, the other end of the jacking support is fixedly connected with one end of the short column, and the other end of the short column is of a wedge-shaped surface structure and is fixedly installed on the lower surface of the inclined joist.
The formwork support frame comprises main sections, transverse horizontal rods, longitudinal horizontal rods and vertical rods which are vertically arranged in pairs; the horizontal rods, the longitudinal horizontal rods and the vertical rods among the main sections form a three-dimensional support frame structure, the lower ends of the vertical rods are sleeved on embedded steel bars embedded in the foundation, and the inclined supports lean against the horizontal rods among the main sections in an inclined mode and are fixedly connected with the horizontal rods among the main sections.
The lower part of the three-dimensional support frame structure is provided with a non-main-section horizontal rod, the non-main-section horizontal rod is vertically erected with a longitudinal horizontal rod and a vertical rod, and the lower part of the inclined support leans against the non-main-section horizontal rod in an inclined mode and is fixedly connected through a right-angle fastener.
The three-dimensional support frame structure is provided with a cross brace, and the cross brace comprises a horizontal cross brace, a first vertical cross brace and a second vertical cross brace; the plane of the horizontal cross braces is vertical to the vertical rods, and the plane of the first vertical cross braces is vertical to the longitudinal horizontal rods; horizontal bridging forms cuboid scissors support frame with first vertical bridging, and the slope of the vertical bridging of second sets up in cuboid scissors support frame.
The distance between the central axis of the vertical rod and the planar projection of the central axis of the inclined support is 100-120mm, and the central axis of the inclined support is superposed with the central axis of the embedded part and the central axis of the inclined joist.
The base on be equipped with a plurality of recess at the interval, the lower extreme of bearing diagonal inserts in the recess.
A first diagonal rod, a second diagonal rod and a third diagonal rod are arranged among the plurality of diagonal supports positioned in the same vertical plane, the first diagonal rod and the second diagonal rod are connected at the connecting position of the diagonal supports and the top angle of the formwork supporting frame, and the third diagonal rod is connected between the supporting piece and the second diagonal rod; the first inclined rod, the second inclined rod and the third inclined rod are arranged in parallel with the inclined joist.
The long-inclined-plane fair-faced concrete formwork comprises formwork bodies, a plurality of main ridges and a plurality of secondary ridges which are arranged on the formwork bodies, and split screw rods connected between the two formwork bodies, wherein the formwork support is connected to the secondary ridges in a spot welding manner
The utility model discloses can set up the support according to the length segmentation on inclined plane, the segmentation concreting has reduced the construction degree of difficulty that long inclined plane clear water concrete template supported, ensures load support reliability, reduces engineering cost, avoids every section concreting the wrong platform phenomenon to appear, guarantees long inclined plane clear water template roughness and straight-in-order straightness, has guaranteed the impression quality on clear water concrete surface, has reduced construction period.
Drawings
FIG. 1 is a schematic elevation view of a long inclined plane bare concrete form support system with an inclination angle of greater than 45 of the present invention;
FIG. 2 is a cross-sectional view taken along plane A-A of FIG. 1;
fig. 3 is an axis positioning relation diagram of the oblique joist and the vertical rod in the long inclined plane fair-faced concrete formwork supporting system with the inclination angle of more than 45 degrees.
In the drawing, 1 long inclined plane fair-faced concrete, 2 times of stupefied, 3 segmentation pouring horizontal construction joints, 4 counter-pulling screw rods, 5 template bodies, 6 main stupefied, 7 template supports, 8 oblique joists, 9 short columns, 10 top supports, 11 oblique supports, 12 main internode transverse horizontal rods, 13 longitudinal horizontal rods, 14 vertical rods, 15 horizontal cross braces, 16 first vertical cross braces, 17 second vertical cross braces, 18 non-main internode transverse horizontal rods, 19 embedded steel bars, 20 grooves, 21 foundations, 22 first inclined rods, 23 second inclined rods, 24 third inclined rods, 25 embedded parts and 26 embedded part foundation beams.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to the attached drawing 1, a long inclined plane fair-faced concrete formwork support system with an inclination angle larger than 45 degrees comprises a formwork support 7, an inclined joist 8, a pre-embedded structure, a support piece, an inclined support 11 and a formwork support frame; the embedded structure is arranged at the rear part of the bottom of the long inclined plane fair-faced concrete template, the lower ends of a plurality of inclined joists 8 are respectively and fixedly arranged on the embedded structure, and the upper surface of each inclined joists 8 and the long inclined plane fair-faced concrete template are connected and fixed through a plurality of template supports 7, so that the inclined joists 8 are supported at the rear lower part of the long inclined plane fair-faced concrete template in parallel; the lower surface of each inclined joist 8 is movably connected with a plurality of inclined struts 11 through supporting pieces, the inclined direction of each inclined joist 8 is opposite to the inclined direction of each inclined joist 11, and the inclined struts 11 are parallel to each other and fixedly arranged on a foundation 21, so that the inclined struts 11 form a supporting structure of the inclined joists 8; the formwork support frame is fixedly erected on the foundation 21, and the inclined support 11 is intersected with the formwork support frame and fixedly connected at the intersected position. Preferably, the formwork supports 7 are made of steel pipes with the diameter of 48 × 3.0 and the thickness of 150mm, the oblique joists 8 are made of square steel with the diameter of 100 × 4, the oblique supports 11 are made of steel pipes with the diameter of 48 × 3.0, and the foundation 21 is reinforced concrete with the thickness of 180 mm.
The embedded structure comprises an embedded part 25 and an embedded part foundation beam 26; the embedded part foundation beam 26 is arranged along the width direction of the bottom of the long-inclined-plane fair-faced concrete 1, the embedded part 25 is embedded in the embedded part foundation beam 26, the lower end of the inclined joist 8 is fixedly welded with the embedded part 25, and the embedded part 25 can bear the tensile force and the shearing force of the inclined joist 8.
The supporting piece comprises a short column 9 and a jacking 10; one end of the jacking 10 is sleeved on the top of the inclined support 11 in a matching mode, the other end of the jacking 10 is fixedly connected with one end of the short column 9, and the other end of the short column 9 is of a wedge-shaped surface structure and is fixedly installed on the lower surface of the inclined joist 8. Preferably, the jacking 10 and the inclined supports 11 can be connected in a threaded mode capable of rotating relatively, and the length of the jacking 10 extending out of the inclined supports 11 can be adjusted, so that the supporting angle of the inclined joist 8 is adjusted through the short column 9, the purpose of finely adjusting the inclination angle of the inclined joist 8 is achieved, and the inclined joist 8 is ensured to be always kept in parallel support below the rear part of the long-inclined-plane fair-faced concrete formwork. The stub 9 may be made of 100 x 4 square steel.
The formwork support frame comprises main inter-section transverse horizontal rods 12, longitudinal horizontal rods 13 and vertical rods 14 which are vertically arranged in pairs; the plurality of main inter-section transverse horizontal rods 12, the longitudinal horizontal rods 13 and the vertical rods 14 form a three-dimensional support frame structure, the lower ends of the vertical rods 14 are sleeved on embedded steel bars 19 embedded in a foundation 21, and the inclined supports 11 lean against the main inter-section transverse horizontal rods 12 in an inclined mode and are fixedly connected with the main inter-section transverse horizontal rods 12 through right-angle fasteners. The diagonal brace 11 is effectively supported by the three-dimensional formwork support frame for load transmission. Preferably, the embedded steel bars 19 can be steel bars with a diameter of 18-32mm, and the specific size is determined according to the inner diameter of the vertical bars 14, so that the vertical bars 14 and the embedded steel bars 19 can be fixedly sleeved.
The lower part of the three-dimensional formwork support frame structure is provided with a non-main-section transverse horizontal rod 18, the non-main-section transverse horizontal rod 18 is vertically erected with a longitudinal horizontal rod 13 and a vertical rod 14, the lower part of the inclined support 11 is obliquely leaned against the non-main-section transverse horizontal rod 18 and is fixedly connected through a right-angle fastener, and the structural stability of the three-dimensional formwork support frame is further improved.
The three-dimensional support frame structure is provided with a cross brace, and the cross brace comprises a horizontal cross brace 15, a first vertical cross brace 16 and a second vertical cross brace 17; the plane of the horizontal cross brace 15 is vertical to the upright stanchion 14, and the plane of the first vertical cross brace 16 is vertical to the longitudinal horizontal bar 13; horizontal bridging 15 forms cuboid scissors support frame with first vertical bridging 16, and the slope of second vertical bridging 17 sets up in cuboid scissors support frame. The load capacity of the template support frame can be further improved through the cross bracing structure.
The foundation 21 is provided with a plurality of grooves 20 at intervals, and the lower ends of the inclined struts 11 are inserted into the grooves 20, so that the support stability of the lower ends of the inclined struts 11 is ensured. Preferably, the size of the recess 20 is 50 x 100, so that it fits the size of the diagonal brace 11, ensuring an effective fixation of the diagonal brace 11.
And a plurality of inclined supports 11 positioned in the same vertical plane are provided with a first inclined rod 22, a second inclined rod 23 and a third inclined rod 24 therebetween, the first inclined rod 22 and the second inclined rod 23 are connected at the vertex angle joint of the inclined supports 11 and the formwork support frame, and the third inclined rod 24 is connected between the supporting piece and the second inclined rod 23. The first diagonal bar 22 and the second diagonal bar 23 can be used for reducing the step pitch, and the third diagonal bar 24 can be used for reducing the free length of the jacking device 10, so that the stability of the whole system is further improved.
The first diagonal rod 22, the second diagonal rod 23 and the third diagonal rod 24 are all arranged in parallel with the diagonal joist 8.
The long inclined plane fair-faced concrete template comprises a template body 5, a plurality of main ridges 6 and a plurality of secondary ridges 2 which are arranged on the template body 5, and a counter-pulling screw rod 4 connected between the two template bodies 5, wherein a template support 7 is connected to the secondary ridges 2 in a spot welding manner, and the dismounting is convenient, labor-saving and rapid. Preferably, the secondary ridges 2 may be made of 100 × 50 × 4mm square steel, the formwork body 5 may be made of 100 × 100mm shim plates, and the primary ridges 6 may be made of 100 × 50 × 4mm square steel.
The distance between the central axis 27 of the upright 14 and the projection 28 of the central axis plane of the inclined strut 11 is 100-120 mm.
And the projection of the central axis of the inclined support 11 is superposed with the central axis of the embedded part 25 and the central axis of the inclined joist 8.
Referring to the attached drawings 1 to 3, the construction steps of the long inclined plane fair-faced concrete formwork support system with the inclination angle larger than 45 degrees of the utility model are as follows:
s1: according to the design position of the long-inclined-plane fair-faced concrete 1, an embedded part foundation beam 26 is poured in the width direction of the bottom of the rear part of the long-inclined-plane fair-faced concrete, and an embedded part 25 is embedded in the embedded part foundation beam 26 and used for bearing the tensile force and the shearing force of the inclined joist 8.
S2: pouring concrete and maintaining the foundation 21, and embedding embedded steel bars 19 in the foundation 21 for fixedly sleeving the bottom ends of the vertical rods 14.
S3: referring to fig. 3, the vertical rod 14 is positioned and paid off, the distance between the central axis 27 of the vertical rod and the central axis plane projection 28 of the inclined strut 11 is 100mm and 120mm, and the central axis of the inclined strut 11 coincides with the central axis of the embedded part 25 and the central axis projection of the inclined joist 8.
S4: a groove 20 having a depth of 50mm and a width of 100mm is formed in the base 21 for fixing the lower end of the diagonal support 11.
S5: the upright stanchion 14, the longitudinal horizontal bar 13 and the transverse horizontal bar 12 are erected into a solid support frame structure, and the upright stanchion 14 is sleeved on the embedded steel bar 19.
S6: the inclined strut 11 leans against a transverse horizontal rod 12 between main sections of each step and is buckled by a right-angle fastener, and the lower end of the inclined strut 11 is positioned in the base groove 20 to resist horizontal component force; after the inclined strut 11 is erected, a non-main-section transverse horizontal rod 18 is erected below the inclined strut 11, and the inclined strut 11, the non-main-section transverse horizontal rod 18 and the longitudinal horizontal rod 13 are buckled by a right-angle fastener.
S7: and (3) installing the inclined joist 8, rotating a jacking 10 of an inclined support 11 through a thread, and jacking the lower surface of the inclined joist 8 by utilizing the top wedge-shaped surface structure of the short column 9 to finely adjust the inclination angle of the inclined joist 8.
S8: the lower end of the inclined joist 8 is welded and fixed with the embedded part 25.
S9: the top wedge-shaped surface structure of the short column 9 is fully welded with the inclined joist 8, and the bottom of the short column 9 is supported by a jacking 10.
S10: and (3) installing and temporarily fixing a section of template of the long-inclined-plane fair-faced concrete 1, and installing and correcting the split bolt 4.
S11: one end of the formwork support 7 is fixed with the secondary ridge 2 of the long inclined plane fair-faced concrete formwork through spot welding, the other end of the formwork support 7 is fixed with the inclined joist 8 through spot welding, and the convenience of installation and disassembly is improved while the support stability is ensured.
S12: and pouring and maintaining the long-slope fair-faced concrete 1 to complete the construction of the first section of long-slope fair-faced concrete 1, wherein the surface of the first section of long-slope fair-faced concrete 1 is a sectional pouring horizontal construction joint 3.
S13: and repeating the steps S7-S12, and constructing the long-slope fair-faced concrete 1 from the second section to the last section. In the construction process of the long-inclined-plane fair-faced concrete 1 in the later stage, the long-inclined-plane fair-faced concrete formwork can be detached.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A long inclined plane fair-faced concrete formwork support system with an inclination angle larger than 45 degrees is characterized in that: the template support comprises a template support (7), an inclined joist (8), a pre-embedded structure, a support piece, an inclined support (11) and a template support frame; the embedded structure is arranged at the rear part of the bottom of the long inclined plane fair-faced concrete template, the lower ends of a plurality of inclined joists (8) are respectively and fixedly arranged on the embedded structure, and the upper surface of each inclined joists (8) and the long inclined plane fair-faced concrete template are connected and fixed through a plurality of template supports (7), so that the inclined joists (8) are supported behind and below the long inclined plane fair-faced concrete template in parallel; the lower surface of each inclined joist (8) is movably connected with a plurality of inclined supports (11) through a support piece, the inclined direction of each inclined joist (8) is opposite to the inclined direction of each inclined strut (11), and the inclined struts (11) are parallel to each other and fixedly arranged on a foundation (21) so that the inclined struts (11) form a supporting structure of the inclined joists (8); the formwork support frame is fixedly erected on the foundation (21), and the inclined support (11) is intersected with the formwork support frame and fixedly connected at the intersected position.
2. The long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 ° as claimed in claim 1, wherein: the embedded structure comprises an embedded part (25) and an embedded part foundation beam (26); the embedded part foundation beam (26) is arranged along the width direction of the bottom of the long-inclined-plane clear water concrete (1), the embedded part (25) is embedded in the embedded part foundation beam (26), and the lower end of the inclined joist (8) is welded and fixed with the embedded part (25).
3. The long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 ° as claimed in claim 1, wherein: the supporting piece comprises a short column (9) and a jacking (10); one end of the jacking support (10) is sleeved on the top of the inclined support (11) in a matching mode, the other end of the jacking support (10) is fixedly connected with one end of the short column (9), and the other end of the short column (9) is of a wedge-shaped surface structure and is fixedly installed on the lower surface of the inclined joist (8).
4. The long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 ° as claimed in claim 1, wherein: the formwork support frame comprises main inter-section transverse horizontal rods (12), longitudinal horizontal rods (13) and vertical rods (14) which are vertically arranged in pairs; a plurality of horizontal rods (12) among main sections, longitudinal horizontal rods (13) and vertical rods (14) form a three-dimensional support frame structure, the lower ends of the vertical rods (14) are sleeved on embedded steel bars (19) embedded in a foundation (21), and inclined supports (11) lean against the horizontal rods (12) among the main sections in an inclined mode and are fixedly connected with the horizontal rods (12) among the main sections.
5. The long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 ° as claimed in claim 4, wherein: the lower part of the three-dimensional support frame structure is provided with a non-main inter-section transverse horizontal rod (18), the non-main inter-section transverse horizontal rod (18) is vertically erected with a longitudinal horizontal rod (13) and a vertical rod (14), and the lower part of the inclined support (11) is obliquely leaned against the non-main inter-section transverse horizontal rod (18) and is fixed.
6. A long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 degrees as claimed in claim 4 or 5, wherein: the three-dimensional support frame structure is provided with a cross brace, and the cross brace comprises a horizontal cross brace (15), a first vertical cross brace (16) and a second vertical cross brace (17); the plane of the horizontal cross braces (15) is vertical to the vertical rods (14), and the plane of the first vertical cross braces (16) is vertical to the longitudinal horizontal rods (13); horizontal bridging (15) and first vertical bridging (16) form cuboid scissors support frame, and the slope of second vertical bridging (17) sets up in cuboid scissors support frame.
7. A long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 degrees as claimed in claim 4 or 5, wherein: the distance between the vertical rod central axis (27) of the vertical rod (14) and the central axis plane projection (28) of the inclined support (11) is 100-120mm, and the central axis of the inclined support (11) is superposed with the central axis of the embedded part (25) and the central axis projection of the inclined joist (8).
8. The long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 ° as claimed in claim 1, wherein: the foundation (21) is provided with a plurality of grooves (20) at intervals, and the lower ends of the inclined supports (11) are inserted into the grooves (20).
9. The long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 ° as claimed in claim 1, wherein: a first diagonal rod (22), a second diagonal rod (23) and a third diagonal rod (24) are arranged among the plurality of diagonal supports (11) positioned in the same vertical plane, the first diagonal rod (22) and the second diagonal rod (23) are connected at the connection position of the diagonal supports (11) and the top angle of the formwork support frame, and the third diagonal rod (24) is connected between the supporting piece and the second diagonal rod (23); the first inclined rod (22), the second inclined rod (23) and the third inclined rod (24) are all arranged in parallel with the inclined joist (8).
10. The long inclined plane fair-faced concrete formwork support system with an inclination angle of more than 45 ° as claimed in claim 1, wherein: the long-inclined-plane fair-faced concrete formwork comprises formwork bodies (5), a plurality of main ridges (6) and a plurality of secondary ridges (2) which are arranged on the formwork bodies (5), and counter-pulling screw rods (4) connected between the two formwork bodies (5), wherein formwork supports (7) are connected to the secondary ridges (2) in a spot welding mode.
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| CN202022566870.9U CN214658863U (en) | 2020-11-09 | 2020-11-09 | Long inclined plane fair-faced concrete formwork support system with inclination angle larger than 45 degrees |
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| CN202022566870.9U CN214658863U (en) | 2020-11-09 | 2020-11-09 | Long inclined plane fair-faced concrete formwork support system with inclination angle larger than 45 degrees |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115288431A (en) * | 2022-08-15 | 2022-11-04 | 中国建筑第八工程局有限公司 | Formwork supporting device for V-shaped concrete cylinder and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115288431A (en) * | 2022-08-15 | 2022-11-04 | 中国建筑第八工程局有限公司 | Formwork supporting device for V-shaped concrete cylinder and construction method thereof |
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