CN113202181A - Simple and accurate manufacturing method of arc-shaped edge-sealing template - Google Patents
Simple and accurate manufacturing method of arc-shaped edge-sealing template Download PDFInfo
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- CN113202181A CN113202181A CN202110532693.9A CN202110532693A CN113202181A CN 113202181 A CN113202181 A CN 113202181A CN 202110532693 A CN202110532693 A CN 202110532693A CN 113202181 A CN113202181 A CN 113202181A
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- 238000007789 sealing Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 129
- 239000010959 steel Substances 0.000 claims abstract description 129
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000002023 wood Substances 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 22
- 238000010276 construction Methods 0.000 claims description 21
- 230000002787 reinforcement Effects 0.000 claims description 12
- 238000005034 decoration Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 239000010985 leather Substances 0.000 claims description 4
- 238000005491 wire drawing Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 230000001788 irregular Effects 0.000 abstract description 3
- 238000012067 mathematical method Methods 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 4
- 238000009415 formwork Methods 0.000 description 4
- 238000009435 building construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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Abstract
The invention discloses a simple and accurate manufacturing method of an arc edge sealing template, which comprises the following steps: s1, measuring and setting out: and calculating the position of the vertex of the tangent plane at the top of the channel according to the chamfer angle. The method comprises the steps of firstly calculating two oblique-section arch foot angular points and vertex positions of an arc line of an oblique section of a vault channel by a mathematical method, releasing the arc line of the oblique section by a flexible line fixed-point veneering paying-off method, carrying out curve coincidence and shaping by using thinner steel bars according to the position of the arc line, installing a steel wire mesh or a wood template by using the shaped steel bars as a framework, and welding the steel wire mesh or the wood template with a triangular steel bar support as a fixing measure of the inclination angle of the template to the framework so as to manufacture an arc-shaped edge sealing template; the vertical keels of the edge sealing template are in loose joint, namely short steel bars, so that the steel bar framework can be bent in X \ Y \ Z three-dimensional planes, and the edge sealing template is suitable for supporting edge templates with arc structures such as irregular arc sections, arc steps and the like.
Description
Technical Field
The invention relates to the technical field of vault channel buildings, in particular to a simple and accurate manufacturing method of an arc-shaped edge sealing template.
Background
Vault channel building: the underground passage is commonly used for pedestrians and traveling vehicles or artistic building corridors, and the top plate in the building is of an arched or circular section.
The existing vault channel design is common in projects such as artistic buildings, underground buildings, tunnel entrances and exits, the entrances and exits are vertical and oblique cutting type, the oblique cutting type entrances and exits usually adopt a concrete cast-in-place structure, the difficulty of one-time construction is high, one-time construction is generally adopted to approximate to an oblique cutting surface, and then the smooth oblique cutting surface is formed by secondary face repair through masonry plastering, so that the quality is poor, particularly the durability of a masonry layer is poor, the quality problems such as water seepage, fracture and the like often occur, and the maintenance cost is high; in addition, the curve steps are common in outdoor projects of schools and squares, and the building and pouring modes are adopted at present, so that the building strength is low, the durability is poor, and the maintenance period is long; when the cast-in-place method is adopted, the difficulty of supporting the curved step formwork is high, a curve is generally replaced by a straight line for many times in a curve fitting mode, the construction of the curved step is completed in a mode of secondary line repairing through mortar plastering, the labor is wasted, the quality is poor, the radian of the curved surface is poor, the appearance is not attractive, and the subsequent plastering or the decoration layer is locally too thick and is easy to crack and fall off.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a simple and accurate manufacturing method of an arc-shaped edge sealing template.
In order to achieve the purpose, the invention adopts the following technical scheme:
the simple and accurate manufacturing method of the arc-shaped edge sealing template comprises the following steps:
s1, measuring and setting out: calculating the position of the vertex of the tangent plane at the top of the channel according to the angular deviation, and determining the arc position of the tangent plane by a supporting distance measuring method and a principle of 'flexible line fixed point veneering pay-off method' and 'fixed length arc line path between three points on the curved surface is unique' to determine the arc line; for the curved surface step, an arc construction line is released by adopting a circle center fixed point wire drawing method and is drawn by paint;
s2, manufacturing an arc steel bar framework: bending and overlapping the flexible steel bars along the determined arc lines in the S to form arc line steel bars, fixing two ends of each arc line steel bar and manufacturing two arc line steel bars, wherein the two arc line steel bars are respectively a lower arc line steel bar and an upper arc line steel bar, short steel bars are welded on the lower arc line steel bars, and the short steel bars are movably connected with the lower arc line steel bars and the upper arc line steel bars;
s3, loose joint binding installation: the upper end of the short steel bar and the upper arc line steel bar are obliquely and crosswise bound by using a binding wire, so that the upper arc line steel bar and the short steel bar cannot move in a plane, and the upper arc line steel bar can move around the short steel bar in an annular manner;
s4, sealing the film: the outer layer decoration adopts a plastering binding layer, and a steel wire mesh and a dense mesh net are selected, and the net is covered and bound on the arc steel reinforcement framework; the outer layer decoration only adopts a coating layer and adopts a wood template to splice a complete cambered surface in a sleeving way;
s5, positioning tripod installation: the non-pouring side positioning tripod is arranged and bound with the arc steel reinforcement framework, so that the non-pouring side positioning tripod is convenient to disassemble and recover, is located on the edge sealing template surface or the concrete surface of the construction layer, and is fixed with the edge sealing template surface or the concrete surface through punching; and installing and pouring the side positioning tripod, pouring the side positioning tripod together in concrete, wherein the side positioning tripod cannot be recycled, the pouring side positioning tripod is only required to prop against the cover template and is not fixedly connected with the cover template, and the pouring side positioning tripod is fixed on the arched template surface or the concrete surface of the construction layer.
Preferably, the flexible line fixed-point facing and paying-off method in S1 is that a flexible line not less than the length of an arc is fixed at the corner point of the chamfer arch, the flexible line is kept closely attached to the arch crown template, and the top of the wire is pulled to the top of the chamfer along the facing at the arch crown.
Preferably, the circle center fixed point bracing method in S1 specifically includes finding out the circle center of the curved surface step arc line by a total station, inserting a fixed leather rod, connecting a handheld vertical rod with flexible bracing wires having the same circle center radius and the same length, engraving a construction step arc line on the construction layer by the handheld vertical rod, and drawing by paint to release a complete arc construction line.
Preferably, the flexible steel bar in S2 is a phi 6 steel bar.
Preferably, the flexible steel bar can be lengthened by welding.
Preferably, the short steel bars in S2 are end short steel bars and middle short steel bars, respectively, and the lower arc steel bars and the upper arc steel bars are welded to the end short steel bars at both ends.
Preferably, the wooden template in S4 is punched and fixed with the arc steel reinforcement framework.
Preferably, the positioning tripod in S5 is formed by welding steel bars.
Compared with the prior art, the invention has the beneficial effects that:
1. the arc-shaped edge sealing template is made of conventional construction materials, the method is simple and easy to operate, the arc-shaped surface can be formed by one-time cast-in-place, and the rough surface and the smooth surface can be formed according to the method of the decorative layer, so that the base layer is prevented from being processed again;
2. the steel bar framework connected by the loose joint can be bent and twisted at will, and can meet the supporting requirements of templates with different curved surfaces;
3. by adopting the positioning tripod, the forming angle of the inclined plane can be accurately formed.
The invention solves the difficult problems of manufacturing and installing the oblique-cutting-surface arc-curved edge sealing template of the vault channel in building construction; firstly, calculating two oblique-section arch foot angular points and vertex positions of an arc line of an oblique-section of a vault channel by a mathematical method, releasing the arc line of the oblique-section by a flexible line fixed-point veneering paying-off method, carrying out curve coincidence and shaping by using thinner steel bars according to the position of the arc line, installing a steel wire mesh or a wood template by using the shaped steel bars as a framework, and welding the steel wire mesh or the wood template with a triangular steel bar support as a fixing measure of the inclination angle of the template to the framework so as to manufacture an arc-shaped edge sealing template; the vertical keels of the edge sealing template are in loose joint, namely short steel bars, so that the steel bar framework can be bent in X \ Y \ Z three-dimensional planes, and the edge sealing template is suitable for supporting edge templates with arc structures such as irregular arc sections, arc steps and the like.
Drawings
FIG. 1 is a schematic structural view of an arched form in the simple and accurate manufacturing method of the curved edge banding form of the present invention;
FIG. 2 is a schematic structural view of a curved surface step in the simple and accurate manufacturing method of the curved edge banding template provided by the present invention;
FIG. 3 is a schematic structural view of a lower arc reinforcement bar in the simple and accurate manufacturing method of the arc-shaped edge-sealing template according to the present invention;
fig. 4 is a schematic structural view of an arc steel reinforcement cage in the simple and accurate manufacturing method of the arc edge banding template provided by the invention;
FIG. 5 is a schematic structural view of an upper arc reinforcement bar in a simple and accurate method for manufacturing the arc-shaped edge-sealing formwork according to the present invention;
FIG. 6 is a schematic structural diagram of a plank sheathing in a simple and accurate method for manufacturing an arc-shaped edge-sealing plank sheathing according to the present invention;
FIG. 7 is a schematic structural view of a non-casting side positioning tripod in the simple and accurate manufacturing method of the curved edge sealing template provided by the invention;
fig. 8 is a schematic structural view of a casting side positioning tripod in the simple and accurate manufacturing method of the arc-shaped edge sealing template provided by the invention.
In the figure: the steel plate is characterized by comprising 1 arched template, 2 diagonal plane arched corner points, 3 arcs, 4 curved surface steps, 5 circle centers, 6 fixed leather rods, 7 flexible stay wires, 8 vertical rods, 9 lower arc steel bars, 10 end short steel bars, 11 middle short steel bars, 12 steel wires, 13 upper arc steel bars, 14 arc steel bar frameworks, 15 wood templates, 16 non-pouring side positioning tripods, 17 edge sealing templates, 18 cover templates and 19 pouring side positioning tripods.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-8, the simple and accurate manufacturing method of the arc-shaped edge sealing template comprises the following steps:
s1, measuring and setting out: calculating the position of the vertex of the tangent plane at the top of the channel according to the angular deviation, and determining two angular points 2 of the oblique tangent plane arch springing on the arch template 1 by supporting the distance measurement, determining the arc position of the oblique tangent plane by the principles of a flexible line fixed point veneering paying-off method and a fixed length arc line with unique path between three points on the curved surface, drawing on the arch template, and determining an arc line 3; for the curved surface step 4, an arc construction line is released by adopting a circle center fixed point wire drawing method and is drawn by paint;
s2, manufacturing the arc steel bar framework 14: bending and overlapping the flexible steel bars along the determined arc 3 in the S1 to form arc steel bars, fixing two ends of each arc steel bar and making two arc steel bars, wherein the two arc steel bars are respectively a lower arc steel bar 9 and an upper arc steel bar 13, a short steel bar is welded on the lower arc steel bar 9, and the short steel bar is movably connected with the lower arc steel bar 9 and the upper arc steel bar 13; wherein, two ends of the lower arc steel bar 9 are tensioned by steel wires 12;
s3, loose joint binding installation: the upper end of the short steel bar and the upper arc steel bar 13 are obliquely cross-bound by using a binding wire, so that the upper arc steel bar 13 and the short steel bar cannot move in a plane, and the upper arc steel bar 13 can move around the short steel bar in a circular manner; wherein, the loose joint connection in the binding form can adopt a finished product switching fastener;
s4, sealing the film: the outer layer decoration adopts a plastering binding layer, a steel wire mesh and a dense mesh net are selected, and the net is covered and bound on the arc steel reinforcement framework 14; the outer layer decoration only adopts a coating layer and adopts a wood template 15 to splice a complete cambered surface in a sleeving way;
s5, positioning tripod installation: the non-pouring side positioning tripod 16 is installed and bound with the arc steel reinforcement framework 14, so that the non-pouring side positioning tripod 16 is convenient to disassemble and recycle, is positioned on the edge sealing formwork 17 surface or the concrete surface of the construction layer, and is punched and fixed with the edge sealing formwork 16 surface or the concrete surface; and installing the casting side positioning tripod 19, casting the casting side positioning tripod 19 together in the concrete, wherein the casting side positioning tripod 19 cannot be recycled, the casting side positioning tripod 19 is only required to be propped against the cover template 18 and is not fixedly connected with the cover template, and the casting side positioning tripod 19 is fixed on the surface 1 of the arched template or the concrete surface of the construction layer.
The flexible line fixed-point veneering and paying-off method in the S1 is characterized in that a flexible line not less than the length of an arc is fixed at the position of an arch corner point 2 of the diagonal plane, the flexible line is kept to be tightly attached to the arch crown template 1, and the top of a wire is pulled to the top of the diagonal plane along a veneer on the arch crown.
In the invention, the circle center fixed point wire drawing method in the S1 is specifically that a total station is used for finding out the circle center 5 of an arc line of a curved surface step 4, a fixed leather rod 6 is inserted, a flexible wire 7 with the same radius as the circle center 5 is connected with a handheld vertical rod 8, the handheld vertical rod 8 is used for carving a construction step arc line on a construction layer, and then paint is used for drawing, so that a complete arc construction line can be released.
In the present invention, the flexible reinforcing bars in S2 are phi 6 reinforcing bars.
In the invention, the flexible steel bar can be welded and lengthened.
In the invention, the short steel bars in the S2 are respectively the end short steel bars 10 and the middle short steel bars 11, and the lower arc steel bars 9 and the upper arc steel bars 13 are welded with the end short steel bars 10 at the two ends.
In the invention, the wooden template 15 in S4 is punched and bound and fixed with the arc steel reinforcement framework.
In the invention, the positioning tripod in the S5 is formed by welding steel bars.
The invention solves the difficult problems of manufacturing and installing the oblique-cutting-surface arc-curved edge sealing template of the vault channel in building construction; firstly, calculating two oblique-section arch foot angular points and vertex positions of an arc line of an oblique-section of a vault channel by a mathematical method, releasing the arc line of the oblique-section by a flexible line fixed-point veneering paying-off method, carrying out curve coincidence and shaping by using thinner steel bars according to the position of the arc line, installing a steel wire mesh or a wood template by using the shaped steel bars as a framework, and welding the steel wire mesh or the wood template with a triangular steel bar support as a fixing measure of the inclination angle of the template to the framework so as to manufacture an arc-shaped edge sealing template; the vertical keels of the edge sealing template are in loose joint, namely short steel bars, so that the steel bar framework can be bent in X \ Y \ Z three-dimensional planes, and the edge sealing template is suitable for supporting edge templates with arc structures such as irregular arc sections, arc steps and the like.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The simple and accurate manufacturing method of the arc-shaped edge sealing template is characterized by comprising the following steps of:
s1, measuring and setting out: calculating the position of the vertex of the tangent plane at the top of the channel according to the angular deviation, and determining the arc position of the tangent plane and drawing the arc position on the arch template by using the principles of a 'flexible line fixed point veneering and paying off method' and 'fixed length arc line with unique path between three points on the curved surface' through two angular deviation corner points (2) for paying off the angular deviation on the arch template (1) by supporting the distance measurement, and determining an arc line (3); for the curved surface step (4), an arc-shaped construction line is released by adopting a circle center fixed point wire drawing method and is drawn by paint;
s2, manufacturing an arc steel bar framework (14): bending and overlapping the flexible steel bars along the determined arc lines (3) in S1 to form arc line steel bars, fixing two ends of each arc line steel bar and making two arc line steel bars, wherein the two arc line steel bars are respectively a lower arc line steel bar (9) and an upper arc line steel bar (13), short steel bars are welded on the lower arc line steel bars (9), and the short steel bars are movably connected with the lower arc line steel bars (9) and the upper arc line steel bars (13);
s3, loose joint binding installation: the upper end of the short steel bar and the upper arc steel bar (13) are obliquely and crosswise bound by using a binding wire, so that the upper arc steel bar (13) and the short steel bar cannot move in a plane, and the upper arc steel bar (13) can move around the short steel bar in an annular manner;
s4, sealing the film: the outer layer decoration adopts a plastering binding layer, a steel wire mesh and a dense mesh net are selected, and the net is covered and bound on the arc steel reinforcement framework (14); the outer layer decoration only adopts a coating layer and adopts a wood template (15) to cut and splice a complete cambered surface;
s5, positioning tripod installation: the non-pouring side positioning tripod (16) is installed and bound with the arc steel reinforcement framework (14), so that the non-pouring side positioning tripod is convenient to disassemble and recover, and the non-pouring side positioning tripod (16) is located on the edge sealing template (17) surface or the concrete surface of the construction layer and is fixed with the edge sealing template (17) surface or the concrete surface through punching; and installing a pouring side positioning tripod (19), pouring the pouring side positioning tripod (19) together in the concrete, wherein the pouring side positioning tripod (19) cannot be recycled, the pouring side positioning tripod (19) is only required to be propped against the cover template (18) and is not fixedly connected with the cover template, and the pouring side positioning tripod (19) is fixed on the surface of the arched template (1) or the concrete surface of the construction layer.
2. The simple and accurate manufacturing method of the curved edge sealing template according to claim 1, wherein the flexible line fixed-point veneering and paying-off method in the S1 is characterized in that a flexible line not less than the length of an arc is adopted and is firstly fixed at the position of an arc corner point (2) of the chamfer, so that the flexible line is kept to be tightly attached to the arch crown template (1), and the top point of a wire is pulled to the top point of the chamfer along the veneering of the arch.
3. The simple and accurate manufacturing method of the curved edge sealing template according to claim 1, wherein the fixed point drawing method for the circle center in S1 is specifically that a total station is used to find out the circle center (5) of the arc line of the curved surface step (4), a fixed leather rod (6) is inserted, flexible drawing lines (7) with equal radius of the circle center (5) are connected with a handheld vertical rod (8), the handheld vertical rod (8) is used to carve out the arc line of the construction step on the construction layer, and then paint is used to draw the arc line, so that a complete arc construction line can be released.
4. The simple and accurate manufacturing method of the arc-shaped edge sealing template according to claim 1, wherein the flexible steel bars in the S2 are phi 6 steel bars.
5. The simple and accurate manufacturing method of an arc-shaped edge banding template according to claim 1, characterized in that the flexible steel bars can be lengthened by welding.
6. The simple and accurate manufacturing method of the arc-shaped edge banding template according to claim 1, characterized in that the short steel bars in the S2 are respectively end short steel bars (10) and middle short steel bars (11), and the lower arc-shaped steel bars (9) and the upper arc-shaped steel bars (13) are welded with the end short steel bars (10) at two ends.
7. The simple and accurate manufacturing method of the arc-shaped edge sealing template according to claim 1, wherein the wood template (15) in the S4 is punched and is bound and fixed with an arc-shaped steel reinforcement framework.
8. The simple and accurate manufacturing method of the arc-shaped edge sealing template according to claim 1, wherein the positioning tripod in the S5 is formed by welding steel bars.
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| CN202110532693.9A CN113202181B (en) | 2021-06-16 | 2021-06-16 | Simple and accurate manufacturing method of arc-shaped edge sealing template |
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| CN202110532693.9A CN113202181B (en) | 2021-06-16 | 2021-06-16 | Simple and accurate manufacturing method of arc-shaped edge sealing template |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431192A (en) * | 2021-08-11 | 2021-09-24 | 中建八局第四建设有限公司 | Arc-curved surface end part and construction method thereof, and vault channel and construction method thereof |
| CN113942084A (en) * | 2021-11-10 | 2022-01-18 | 中国建筑第七工程局有限公司 | Arc-shaped template blanking tool and method |
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| CN113202181B (en) | 2022-05-06 |
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