CN111195977A - Concrete structure bay window frame plate integral casting inner formwork system and mounting and dismounting method thereof - Google Patents
Concrete structure bay window frame plate integral casting inner formwork system and mounting and dismounting method thereof Download PDFInfo
- Publication number
- CN111195977A CN111195977A CN202010096429.0A CN202010096429A CN111195977A CN 111195977 A CN111195977 A CN 111195977A CN 202010096429 A CN202010096429 A CN 202010096429A CN 111195977 A CN111195977 A CN 111195977A
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- Prior art keywords
- bay window
- frame plate
- template
- shaped
- frame
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
- B28B23/024—Supporting means
Abstract
The invention discloses an integral casting inner template system of a bay window frame plate of a concrete structure and an installing and detaching method thereof, which solve the problem of how to conveniently and high-quality finish the erection and detachment of the integral casting template of the bay window. The method comprises the steps of installing a top end inner side template for integrally pouring square frame plates of a concrete structure on a frame body with a telescopic upper end on a box frame body, installing left and right side inner side templates on the frame body capable of stretching left and right, placing the box frame body on a bottom template for integrally pouring the square frame plates bound with bottom die steel bars, extending the top end inner side template and the two side templates outwards to enable the top end inner side template and the two side inner side templates to form an inner template for integrally pouring the frame plates, retracting the top end inner side template downwards after concreting is solidified, retracting the two side inner side templates inwards, and taking the box frame body with the top end inner side template and the two side inner side templates out of a bay window frame plate. Simple and convenient to use and can be repeatedly utilized.
Description
Technical Field
The invention relates to a building overhanging floating window pouring template system, in particular to an inner template system for integrally pouring a frame plate of an overhanging floating window with the periphery closed in a concrete structure.
Background
In residential buildings, bay windows have become a common external window structure, and in order to meet the requirement of the integral modeling of the external wall of a building body, some bay windows are designed to be in an overhanging convex shape, namely the bay windows are installed in a square frame plate of a concrete structure which is closed on four sides and is cantilevered to the outer side of the building body, and the square frame plate of the concrete structure is formed by cast-in-place concrete; in the field construction, the square frame plate of the concrete structure is mostly finished by pouring concrete step by step, the most common method is to pour the bottom floating window plate of the square frame plate firstly, after the poured concrete is initially solidified, pour the two side floating window plates of the square frame plate, and finally pour the gourd ladle window top plate of the square frame plate, the method for pouring the overhanging floating window frame plate step by step has the defects that the construction progress is slow, the step-by-step formwork removal time of each formwork cannot be accurately mastered, and the problem that the concrete surface of the poured frame plate is damaged when the formwork is removed easily occurs, so that the forming quality of the frame plate is not high; in the prior art, the whole pouring of the overhanging bay window frame plate is carried out by arranging the bay window whole templates around the tower, but the problems that the time and the labor are consumed for erecting and disassembling the whole template system, particularly the inner side template, exist, and particularly when the number of bay windows needing to be poured on site is large, the problem is particularly prominent, and how to conveniently complete the erecting and disassembling of the bay window whole pouring template with high quality becomes a technical problem which is urgently needed to be solved on the construction site.
Disclosure of Invention
The invention provides an integral casting inner template system of a bay window frame plate of a concrete structure and an installing and detaching method thereof, which solve the technical problem of how to conveniently and high-quality finish the erection and detachment of the integral casting template of the bay window.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: installing the top end inner side template for integrally pouring the square frame plate of the concrete structure on an upper end telescopic frame body on a box frame body, installing the left side inner side template and the right side inner side template on the frame body which can be horizontally stretched, then placing the box frame body on a bottom template for integrally pouring the square frame plate with bound bottom mould reinforcing steel bars, upwards extending the top end inner side template, outwards extending the two side templates, enabling the top end inner side template and the two side inner side templates to form an inner template for integrally pouring the square frame plate of the concrete structure, then completing the reinforcement of the two side frame plates and the top frame plate, installing the top end outer side template and the two side outer side templates according to a conventional method, then carrying out the integral concrete pouring of the bay window frame plate, after the poured concrete is solidified, downwards retracting the top end inner side template, inwards retracting the two side inner side templates, and taking the box-shaped frame body with the top-end inner side template and the two side inner side templates out of the bay window frame plate of the poured concrete structure, and installing the bay window frame plate into the next bay window frame plate to be poured for reuse.
An inner formwork system for integrally pouring a concrete structure bay window frame plate comprises a # -shaped steel pipe front bent frame and a # -shaped steel pipe rear bent frame, wherein the # -shaped steel pipe front bent frame and the # -shaped steel pipe rear bent frame are arranged in parallel at equal intervals along the front-back direction; a left telescopic rod is movably arranged in the left ports of the two horizontal pipes of the front bent frame of the # -shaped steel pipe and the left ports of the two horizontal pipes of the rear bent frame of the # -shaped steel pipe, and a bay window left frame plate pouring template is fixedly connected between the left ends of the four left telescopic rods; a right telescopic rod is movably arranged in the right end ports of the two horizontal pipes of the front bent frame of the # -shaped steel pipe and the right end ports of the two horizontal pipes of the rear bent frame of the # -shaped steel pipe, and a frame plate pouring template on the right side of the bay window is fixedly connected between the right ends of the four right telescopic rods; the top end face of the bay window left side frame plate pouring template is welded with an L-shaped left angle steel bar, and the top end face of the bay window right side frame plate pouring template is welded with an L-shaped right angle steel bar.
Last top fixedly connected with upper end U-shaped bracket of telescopic link, be provided with the square billet in the upper end U-shaped bracket, be provided with the hand power ring on the medial surface of square billet, the lateral surface of square billet with waft the window roof board and pour template fixed connection together, it passes the hole to be provided with the telescopic link pin on the lower extreme body of rod of last telescopic link equidistance, it passes the hole to be provided with the riser pin on the pipe wall of well font steel pipe front bent's riser upper end equidistance, it has the pin to cross-under between passing the hole at the telescopic link pin through hole and riser.
The method for installing and disassembling the floating window frame plate integral casting inner template system of the concrete structure comprises a floating window bottom frame plate casting template and a concrete prefabricated cushion block, wherein a herringbone-shaped steel bar support frame is pre-embedded in the concrete prefabricated cushion block, and the method is characterized by comprising the following steps of:
firstly, finishing binding work of bottom template steel bars and frame plate side plate steel bars on a bay window bottom frame plate pouring template;
secondly, positioning four concrete prefabricated cushion blocks on a bay window bottom frame plate pouring template, then putting the box-shaped frame body between reinforcing steel bars of two frame plate side plates, correspondingly placing the bottom ends of four upright posts of the box-shaped frame body on the concrete prefabricated cushion blocks, and inserting the top reinforcing steel bars of the herringbone reinforcing steel bar supporting frame into the bottom end ports of the corresponding upright posts;
thirdly, extending the four left telescopic rods leftwards to position the frame plate pouring template on the left side of the bay window at the frame plate pouring position, inserting pins between the corresponding telescopic rod pin through holes and the vertical pipe pin through holes in the pouring positioning position, and positioning and fixing the frame plate pouring template on the left side of the bay window; positioning and fixing the frame plate pouring template on the right side of the bay window by the same method;
fourthly, lifting the four upper telescopic rods upwards to align the bay window top plate pouring template with a top end horizontal plate of the L-shaped left-angle steel bar and a top end horizontal plate of the L-shaped right-angle steel bar, inserting pins between corresponding telescopic rod pin through holes and vertical pipe pin through holes in the pouring positioning positions, and positioning and fixing the bay window top plate pouring template;
fifthly, respectively arranging movable battens at the lower end of the bay window left side frame plate pouring template and the lower end of the bay window right side frame plate pouring template to finish the installation of the bay window frame plate integral pouring inner template system;
sixthly, finishing the steel bar binding work of the bay window top frame plate on the bay window top plate pouring template, installing the frame plate pouring outer templates at the two sides of the bay window, and then, pouring the integral concrete of the bay window frame plate;
seventhly, after the poured concrete is solidified, pulling out the pin, enabling the bay window top plate pouring template to retract downwards by pulling a hand pull ring arranged on the inner side surface of the square steel bar, enabling the bay window left side frame plate pouring template to retract towards the right, enabling the bay window right side frame plate pouring template to retract towards the left, and removing movable plugboard strips respectively arranged at the lower end of the bay window left side frame plate pouring template and the lower end of the bay window right side frame plate pouring template;
and eighthly, cutting off the steel bar support frame in the shape of the Chinese character 'ji', enabling the box-shaped frame body to fall down, enabling the top end horizontal plate of the L-shaped left angle steel bar and the top end horizontal plate of the L-shaped right angle steel bar to be separated from the poured frame top plate, and taking out the box-shaped frame body from the poured integral bay window frame plate.
The bay window sealing framework is low in manufacturing cost, simple and convenient to use, capable of being repeatedly used, capable of guaranteeing the pouring quality of the bay window sealing framework and saving the mounting and dismounting time of the bay window integral pouring template, and particularly suitable for being used in bay window construction of high-rise buildings.
Drawings
Fig. 1 is a schematic structural view of a box-shaped frame body of the present invention;
fig. 2 is a view showing a fitting relationship between the box-shaped frame body and the inside form of the invention;
FIG. 3 is a schematic structural view of the bay window integral frame slab casting of the present invention;
fig. 4 is a diagram of the fitting relationship between the vertical pipe and the telescopic rod 5 in the box-shaped frame body of the present invention;
FIG. 5 is a view showing the fitting relationship between the horizontal pipe and the left and right extendable rods in the box-shaped frame body;
fig. 6 is a schematic structural view of a cast bay window integral frame panel on a shear wall.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
an inner template system for integrally pouring a bay window frame plate of a concrete structure is matched with a concrete outer pouring template of a conventional bay window frame plate to finish the integral pouring of the bay window frame plate, and comprises a # -shaped steel pipe front bent 1 and a # -shaped steel pipe rear bent 2, wherein the # -shaped steel pipe front bent 1 and the # -shaped steel pipe rear bent 2 are arranged in parallel at equal intervals along the front-back direction, two parallel upper connecting rods 3 and two parallel lower connecting rods 4 are fixedly arranged between the # -shaped steel pipe front bent 1 and the # -shaped steel pipe rear bent 2, the # -shaped steel pipe front bent 1, the # -shaped steel pipe rear bent 2, the two parallel upper connecting rods 3 and the two parallel lower connecting rods 4 form a box-shaped frame body, two vertical pipe top ports of the # -shaped steel pipe front bent 1 and two vertical pipe top ports of the # -shaped steel pipe rear bent 2, an upper telescopic rod 5 is movably arranged, and bay window roof plate pouring formworks 8 are fixedly connected between the top ends of the four upper telescopic rods 5, so that the bay window roof plate pouring formworks 8 can extend upwards and retract downwards; a left telescopic rod 6 is movably arranged in the left ports of the two horizontal pipes of the front bent frame 1 of the # -shaped steel pipe and the left ports of the two horizontal pipes of the rear bent frame 2 of the # -shaped steel pipe, and a bay window left frame plate pouring template 9 is fixedly connected between the left ends of the four left telescopic rods 6, so that the bay window left frame plate pouring template 9 can extend leftwards and retract rightwards; a right telescopic rod 7 is movably arranged in the right end ports of the two horizontal pipes of the front bent frame 1 of the # -shaped steel pipe and the right end ports of the two horizontal pipes of the rear bent frame 2 of the # -shaped steel pipe, and a frame plate pouring template 10 on the right side of the bay window is fixedly connected between the right ends of the four right telescopic rods 7, so that the frame plate pouring template 10 on the right side of the bay window can extend out rightwards and retract leftwards; the top end face of the bay window left side frame plate pouring template 9 is welded with an L-shaped left angle steel bar 11, and the top end face of the bay window right side frame plate pouring template 10 is welded with an L-shaped right angle steel bar 12; the box-shaped frame body is used as an inner core, three frame plate pouring templates on the box-shaped frame body are used as bay window frame plates to pour an inner template after extending out, and the inner template is matched with an outer template to finish the integral pouring of the bay window frame plates; after the integral pouring of the bay window frame plate is finished, the pouring templates of the three frame plates retract, so that the inner template system contracts, the size is reduced, and the bay window frame plate can be taken out of the poured frame plate and recycled.
An upper end U-shaped bracket 16 is fixedly connected to the top end of the upper telescopic rod 5, a square steel rod 20 is arranged in the upper end U-shaped bracket 16, a hand pull ring 21 is arranged on the inner side surface of the square steel rod 20, the outer side surface of the square steel rod 20 is fixedly connected with a bay window top plate pouring template 8, telescopic rod pin penetrating holes 17 are formed in the lower end rod body of the upper telescopic rod 5 at equal intervals, vertical pipe pin penetrating holes 18 are formed in the pipe wall of the upper end of a vertical pipe of the well-shaped steel pipe front row frame 1 at equal intervals, and pins 19 are connected between the telescopic rod pin penetrating holes 17 and the vertical pipe pin; the telescopic rod pin penetrating holes 17 can be only provided with two pins, one pin is used for being connected in a transmission mode in a working state after being extended out, and the other pin is used for being connected in a penetration mode when the telescopic rod retracts into the vertical tube cavity.
The method for installing and disassembling the integral casting inner template system of the bay window frame plate of the concrete structure comprises a bay window bottom frame plate casting template 13 and a concrete prefabricated cushion block 14, wherein a herringbone reinforcing steel bar support frame 15 is pre-embedded in the concrete prefabricated cushion block 14, and is characterized by comprising the following steps of:
firstly, finishing binding work of bottom template steel bars and frame plate side plate steel bars on a bay window bottom frame plate pouring template 13;
secondly, positioning four concrete prefabricated cushion blocks 14 on a bay window bottom frame plate pouring template 13, then placing the box-shaped frame body between reinforcing steel bars of two frame plate side plates, correspondingly placing the bottom ends of four upright posts of the box-shaped frame body on the concrete prefabricated cushion blocks 14, and inserting top reinforcing steel bars of a herringbone reinforcing steel bar support frame 15 into bottom ports of the corresponding upright posts;
thirdly, extending the four left telescopic rods 6 to the left, positioning the bay window left frame plate pouring template 9 at a frame plate pouring position, inserting pins 19 between corresponding telescopic rod pin through holes 17 and vertical pipe pin through holes 18 at the pouring positioning position, and positioning and fixing the bay window left frame plate pouring template 9; positioning and fixing the bay window right side frame plate pouring template 10 by the same method;
fourthly, lifting the four upper telescopic rods 5 upwards to align the bay window top plate pouring template 8 with a top horizontal plate of the L-shaped left angle steel bar 11 and a top horizontal plate of the L-shaped right angle steel bar 12, inserting pins between corresponding telescopic rod pin through holes and vertical pipe pin through holes in the pouring positioning positions, and positioning and fixing the bay window top plate pouring template 8;
fifthly, respectively arranging movable battens at the lower end of the bay window left side frame plate pouring template 9 and the lower end of the bay window right side frame plate pouring template 10 to finish the installation of the bay window frame plate integral pouring inner template system;
sixthly, finishing the steel bar binding work of the bay window top frame plate on the bay window top plate pouring template 8, installing the frame plate pouring outer templates at the two sides of the bay window, and then, pouring the integral concrete of the bay window frame plate;
seventhly, after the poured concrete is solidified, pulling out the pin 19, drawing a hand pull ring 21 arranged on the inner side surface of the square steel bar 20 to enable the bay window top plate pouring template 8 to retract downwards, enabling the bay window left side frame plate pouring template 9 to retract rightwards, enabling the bay window right side frame plate pouring template 10 to retract leftwards, and removing movable plugboard strips respectively arranged at the lower end of the bay window left side frame plate pouring template 9 and the lower end of the bay window right side frame plate pouring template 10;
and eighthly, cutting off the steel bar support frame 15 in the shape of the Chinese character 'ji', enabling the box-shaped frame body to fall down, enabling the top end horizontal plate of the L-shaped left-angle steel bar 11 and the top end horizontal plate of the L-shaped right-angle steel bar 12 to be separated from the poured frame top plate, and taking out the box-shaped frame body from the poured integral bay window frame plate.
Claims (3)
1. An inner template system for integrally pouring a bay window frame plate of a concrete structure comprises a front grillage (1) of a groined steel pipe and a rear grillage (2) of the groined steel pipe, wherein the front grillage (1) of the groined steel pipe and the rear grillage (2) of the groined steel pipe are arranged in parallel at equal intervals along the front-back direction, two parallel upper connecting rods (3) and two parallel lower connecting rods (4) are fixedly arranged between the front grillage (1) of the groined steel pipe and the rear grillage (2) of the groined steel pipe, the front grillage (1) of the groined steel pipe, the rear grillage (2) of the groined steel pipe, the two parallel upper connecting rods (3) and the two parallel lower connecting rods (4) form a box-shaped frame body, and is characterized in that the two vertical pipe top ports of the front grillage (1) of the groined steel pipe and the two vertical pipe top ports of the rear grillage (2) of the groined steel pipe, an upper telescopic rod (5) is movably arranged, and bay window roof plate pouring formworks (8) are fixedly connected between the top ends of the four upper telescopic rods (5); a left telescopic rod (6) is movably arranged in the left ports of the two horizontal pipes of the front bent frame (1) of the # -shaped steel pipe and the left ports of the two horizontal pipes of the rear bent frame (2) of the # -shaped steel pipe, and a bay window left frame plate pouring template (9) is fixedly connected between the left ends of the four left telescopic rods (6); a right telescopic rod (7) is movably arranged in the right end ports of the two horizontal pipes of the front bent frame (1) of the # -shaped steel pipe and the right end ports of the two horizontal pipes of the rear bent frame (2) of the # -shaped steel pipe, and a bay window right frame plate pouring template (10) is fixedly connected between the right ends of the four right telescopic rods (7); the top end face of the bay window left side frame plate pouring template (9) is welded with an L-shaped left angle steel bar (11), and the top end face of the bay window right side frame plate pouring template (10) is welded with an L-shaped right angle steel bar (12).
2. The concrete structure bay window frame plate integral casting inner formwork system according to claim 1, characterized in that an upper end U-shaped bracket (16) is fixedly connected to the top end of an upper telescopic rod (5), a square steel rod (20) is arranged in the upper end U-shaped bracket (16), a hand pull ring (21) is arranged on the inner side surface of the square steel rod (20), the outer side surface of the square steel rod (20) is fixedly connected with a bay window top plate casting formwork (8), telescopic rod pin penetrating holes (17) are arranged on the lower end rod body of the upper telescopic rod (5) at equal intervals, vertical pipe pin penetrating holes (18) are arranged on the pipe wall of the upper end of a vertical pipe of the groined steel pipe front-row frame (1) at equal intervals, and pins (19) are connected between the telescopic rod penetrating holes (17) and the vertical pipe pin penetrating holes (18) in a.
3. The method for installing and disassembling the integral casting inner template system of the bay window frame plate of the concrete structure according to claim 2, which comprises a bay window bottom frame plate casting template (13) and a concrete precast cushion block (14), wherein a herringbone-shaped steel bar support frame (15) is embedded in the concrete precast cushion block (14), and is characterized by comprising the following steps:
firstly, finishing binding work of bottom template steel bars and frame plate side plate steel bars on a bay window bottom frame plate pouring template (13);
secondly, positioning four concrete prefabricated cushion blocks (14) on a bay window bottom frame plate pouring template (13), putting the box-shaped frame body between reinforcing steel bars of two frame plate side plates, correspondingly placing the bottom ends of four upright posts of the box-shaped frame body on the concrete prefabricated cushion blocks (14), and inserting top reinforcing steel bars of a herringbone reinforcing steel bar support frame (15) into bottom end ports of the corresponding upright posts;
thirdly, extending four left telescopic rods (6) leftwards to enable the bay window left side frame plate pouring template (9) to be positioned at the frame plate pouring position, inserting pins (19) between corresponding telescopic rod pin penetrating holes (17) and vertical pipe pin penetrating holes (18) at the pouring positioning position, and positioning and fixing the bay window left side frame plate pouring template (9); the same method is used for positioning and fixing the frame plate pouring template (10) on the right side of the bay window;
fourthly, the four upper telescopic rods (5) are lifted upwards, so that the bay window top plate pouring template (8) is aligned with the top horizontal plate of the L-shaped left angle steel bar (11) and the top horizontal plate of the L-shaped right angle steel bar (12), pins are inserted between the corresponding telescopic rod pin through holes and the vertical pipe pin through holes in the pouring positioning positions, and the bay window top plate pouring template (8) is positioned and fixed;
fifthly, respectively arranging movable battens at the lower end of the bay window left side frame plate pouring template (9) and the lower end of the bay window right side frame plate pouring template (10) to finish the installation of the bay window frame plate integral pouring inner template system;
sixthly, finishing the steel bar binding work of the bay window top frame plate on the bay window top plate pouring template (8), installing frame plate pouring outer templates at two sides of the bay window, and then pouring the integral concrete of the bay window frame plate;
seventhly, after the poured concrete is solidified, pulling out pins (19), enabling a bay window top plate pouring template (8) to retract downwards by pulling hand pull rings (21) arranged on the inner side surfaces of square steel bars (20), enabling a bay window left side frame plate pouring template (9) to retract rightwards, enabling a bay window right side frame plate pouring template (10) to retract leftwards, and removing movable flashboard strips respectively arranged at the lower ends of the bay window left side frame plate pouring template (9) and the bay window right side frame plate pouring template (10);
and eighthly, cutting off the steel bar support frame (15) in the shape of the Chinese character 'ji', enabling the box-shaped frame body to fall down, enabling the top horizontal plate of the L-shaped left-angle steel bar (11) and the top horizontal plate of the L-shaped right-angle steel bar (12) to be separated from the poured frame top plate, and taking out the box-shaped frame body from the poured integral bay window frame plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010096429.0A CN111195977A (en) | 2020-02-18 | 2020-02-18 | Concrete structure bay window frame plate integral casting inner formwork system and mounting and dismounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010096429.0A CN111195977A (en) | 2020-02-18 | 2020-02-18 | Concrete structure bay window frame plate integral casting inner formwork system and mounting and dismounting method thereof |
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| CN111195977A true CN111195977A (en) | 2020-05-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113005928A (en) * | 2021-03-15 | 2021-06-22 | 山西三建集团有限公司 | Formwork erecting method for concrete pouring of ultra-long small box culvert |
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2020
- 2020-02-18 CN CN202010096429.0A patent/CN111195977A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113005928A (en) * | 2021-03-15 | 2021-06-22 | 山西三建集团有限公司 | Formwork erecting method for concrete pouring of ultra-long small box culvert |
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