Improved concrete road steel form

Abstract

The application provides an improved concrete road steel formwork, which comprises a steel formwork, a reserved hole closer, a support, an anchor rod, an end plate and a jacking device, the steel formwork is uniformly provided with a reserved hole for a force transmission rod, the reserved hole for the force transmission rod is closed or opened by moving the reserved hole closer, the end plate is used for connecting adjacent steel formworks, and the jacking device is installed on the lower side of the steel formwork, so that the elevation of the improved new steel formwork is conveniently adjusted.The application has the advantages that the design of the reserved hole for the force transmission rod facilitates the subsequent reservation and pre-burying of the force transmission rod at the position where the force transmission rod is required to be arranged due to construction, the steel formwork is not required to be cut or drilled in subsequent construction, the damage to the steel formwork is reduced, the construction cost is saved, the construction difficulty is greatly reduced, the construction time is saved, the design of the jacking device facilitates the adjustment of the elevation of the local steel formwork, the situation that the elevation of the steel formwork cannot be adjusted due to the local unevenness of the base is solved, and the construction quality of the concrete road can be better guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of road construction, and specifically relates to an improved steel formwork for concrete roads. Background Technology

[0002] Road construction steel formwork is a temporary support structure used in road construction, providing a stable foundation for the project. It consists of the following components: steel formwork plates: made of high-strength steel plates, possessing high load-bearing capacity and stability; support frame: made of steel pipes, providing support and stability for the steel formwork; end connectors: used to connect the steel formwork plates and the support frame, ensuring the overall stability of the road steel formwork; clamps and bolts: used to fix the steel formwork plates and support frame, increasing overall stability and safety.

[0003] The construction process of steel formwork for road construction generally follows these steps: Before construction, the road needs to be positioned and measured to determine its width and length. Based on the road dimensions, the required quantity and size of steel formwork are determined. First, the steel formwork panels and supporting frames need to be assembled. The quantity and arrangement of the steel formwork panels are determined based on the road's width and length. Then, the supporting frames are arranged at certain intervals and connected together using end connectors. Finally, the steel formwork panels are fixed to the supporting frames using clamps and bolts. After installation, the steel formwork needs to be adjusted to ensure its horizontal and vertical alignment meets requirements. Fine-tuning of the steel formwork can be done by adjusting the height of the supporting frames and using adjusting bolts. After the steel formwork installation is completed, inspection and acceptance should be carried out to ensure the installation quality and stability of the steel formwork. Inspection includes checking whether the steel formwork connectors are securely fixed and whether the steel formwork panels are deformed or damaged.

[0004] Traditional concrete road construction often employs monolithic casting, resulting in long construction cycles and requiring extensive manual labor, leading to low construction efficiency and inconsistent construction quality. Furthermore, traditional road formwork cannot adjust elevations, pre-installing and embedding dowel bars is cumbersome, and sometimes requires cutting and damaging existing steel formwork. Formwork installation, reinforcement, and dismantling are difficult, and repeated transport and reuse of road formwork is time-consuming and labor-intensive, significantly increasing construction time and costs. Therefore, it is necessary to invent an improved concrete road steel formwork structure and construction method to solve the above problems. Summary of the Invention

[0005] To address the problems of traditional road formwork construction elevation being unable to be adjusted and the cumbersome pre-embedding of dowel bars, this invention provides an improved concrete road construction formwork that facilitates easy formwork elevation adjustment, dowel bar pre-embedding, rapid and stable reinforcement, dismantling, and transportation.

[0006] The solution adopted by this invention to solve its technical problem is: an improved concrete road steel formwork, including a steel formwork, a pre-reserved hole closure device, a support, anchor rods, an end plate, and a lifting device. The steel formwork is made of rectangular channel steel. Pre-reserved holes for force transmission rods are evenly arranged on the vertical side plates of the rectangular channel steel. Guide grooves are provided on the upper and lower sides of the pre-reserved holes for force transmission rods. A pre-reserved hole closure device is installed in the guide grooves. The pre-reserved hole closure device is a rectangular iron plate. Openings at intervals on the rectangular iron plate are at the same height as the pre-reserved holes for force transmission rods. The number of openings is the same as the number of pre-reserved holes for force transmission rods. By moving the rectangular iron plate left and right, the openings overlap or misalign with the pre-reserved holes for force transmission rods, thereby achieving the sealing or opening of the pre-reserved holes for force transmission rods.

[0007] The steel formwork has vertical shaft holes in its grooves. A bracket is fitted through the shaft holes and can rotate within them. The bracket extends outward from the steel formwork, and an annular shell is fixed to the end of the bracket. A spherical surface is provided on the inner side of the annular shell. A freely rotating sphere is fitted through the spherical structure. A vertical through-hole is provided in the center of the sphere. An anchor rod is inserted into the ground through the through-hole. Because the sphere can rotate within the annular shell, the anchor rod can tilt at different angles as the sphere rotates, thus fixing the steel formwork more firmly.

[0008] The end plate is used to connect adjacent steel formwork. The end of the steel formwork is provided with pin holes, and the end plate is provided with corresponding through holes. Pins are inserted into the pin holes and through holes. The pins are provided with strip holes, and trapezoidal pin pieces are inserted into the strip holes.

[0009] The lifting device is installed on the lower side of the steel formwork. A top sleeve is fixed in the middle of the steel formwork. A square guide tube is set on the lower side plate of the steel formwork. The fixed sleeve corresponds to the hole of the guide tube. A piston sleeve is fitted in the fixed sleeve. A screw hole is set on the lower side of the piston sleeve. An inner sleeve is fitted in the guide sleeve. A screw hole is set in the inner sleeve. A screw rod is set between the piston sleeve and the inner sleeve. The two ends of the screw rod are respectively fitted into the screw holes of the piston sleeve and the inner sleeve. A hexagonal screw sleeve is set in the middle section of the screw rod. The hexagonal screw sleeve is fixed to the screw rod. The lower end of the inner sleeve extends to the bottom of the steel formwork. A folding pulley is installed at the lower end of the inner sleeve.

[0010] Furthermore, a sealed air chamber is set between the fixed sleeve and the piston sleeve. The air chambers between multiple lifting devices are connected by a sealed vent pipe. Under no-pressure conditions, the air chamber has the same pressure as the outside. The air chamber is also connected to a piston pump, which controls the amount of air in the air chamber.

[0011] Furthermore, a bent vertical plate is provided at one end of the rectangular iron plate as a handle, which is used to push the rectangular iron plate to move left and right. A push rod is installed at the end of the rectangular iron plate where the handle is located. The telescopic end of the push rod is fixedly connected to the vertical plate-style handle, and the fixed end of the push rod is installed on the steel template. The push rod is used to push the rectangular iron plate to move and block or open the pre-drilled hole of the force transmission rod.

[0012] Furthermore, a rectangular groove is provided on the vertical side plate, a reserved hole is provided in the rectangular groove, and guide slots are provided on both sides of the rectangular groove. One end of the guide slot is connected to the side of the rectangular groove, and the other end is not connected to the side of the rectangular groove, so that a gap is left between the side of the rectangular groove and the guide slot for inserting and sealing the iron plate.

[0013] Furthermore, the bracket adopts a triangular bracket, wherein the vertical side of the triangular bracket extends to both sides to form a rotating shaft fitted between the upper and lower shaft holes, the intersection of the hypotenuses extends laterally outward, and the extended end is welded to fix an annular shell, which is formed by symmetrically cutting the two sides of a hollow sphere.

[0014] The improved concrete road steel formwork also includes a manual formwork removal and transfer device. The manual formwork removal and transfer device includes a pole and two steel cylinders at the ends of the pole. One steel cylinder is inserted into the pre-drilled hole of the force transmission rod of the steel formwork, and the other steel cylinder is stuck in the upper part of the steel formwork. The steel formwork is moved by the manual transfer device and the folding pulley.

[0015] Compared with traditional construction methods, the advantages of this invention are: the design and reservation of the dowel rod holes facilitates the pre-reservation and embedding of dowel rods in the dowel rod locations required for subsequent construction, eliminating the need to cut or drill holes in the formwork during subsequent construction, reducing damage to the steel formwork, saving construction costs, greatly reducing construction difficulty, and saving construction time.

[0016] The steel formwork ends are connected by pre-drilled holes and pins, making construction simpler and more convenient. The joints between steel formwork are connected by pins, making the connection tighter and more secure and preventing grout leakage at the ends. The side supports of the steel formwork adopt a standardized tripod reinforcement method, which is simpler and more convenient than traditional reinforcement methods, and is very stable, preventing the steel formwork from tilting, moving or bulging.

[0017] The jacking device design facilitates the adjustment of local steel formwork elevation, resolving situations where unevenness in the foundation prevents elevation adjustment and ensuring higher construction quality for concrete roads. The addition of foldable pulleys and a manual transport device improves the efficiency of reusing the new steel formwork, facilitating manual transport and eliminating the need for extensive manual and mechanical transport of traditional steel formwork due to its length and weight. This significantly saves manpower and improves construction efficiency.

[0018] In addition, the use of integral casting makes the construction quality of concrete roads more stable. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the steel formwork connection structure.

[0021] Figure 3 This is a schematic diagram of the end plate and pin / pin structure.

[0022] Figure 4 yes Figure 1 Enlarged view of section A.

[0023] Figure 5 This is a schematic diagram showing two states of the lifting device.

[0024] Figure 6 This is a schematic diagram of the structure of the lifting device with an air chamber.

[0025] The following are the labels in the diagram: 1. Steel template; 2. Pre-drilled hole sealer; 3. Support; 4. Anchor rod; 5. End plate; 7. Lifting device; 8. Piston pump; 9. Force transmission rod; 101. Pre-drilled hole; 102. Pin hole; 201. Window; 202. Handle; 203. Push rod; 301. Annular shell; 302. Sphere; 501. Pin; 502. Strip hole; 503. Pin piece; 701. Fixed sleeve; 702. Guide tube; 703. Folding pulley; 704. Screw; 705. Hexagonal screw sleeve; 706. Inner sleeve; 707. Air chamber; 708. Vent pipe; 709. Piston sleeve. Detailed Implementation

[0026] Example 1: This invention provides an improved steel formwork for concrete roads used in road construction, such as... Figure 1 As shown, the improved steel formwork includes a steel formwork body 1 with a rectangular channel steel structure. The channel steel includes a vertical side plate located at the bottom of the groove and a horizontal side plate located on both sides. Force transmission rod reserved holes 101 are evenly arranged on the vertical side plate of the channel steel. Guide slots are provided on the upper and lower sides of the force transmission rod reserved holes 101. A reserved hole closure device 2 is fitted into the guide slot. The reserved hole closure device 2 is a rectangular iron plate. Openings 201 at intervals at the same height as the force transmission rod reserved holes 101 are arranged on the rectangular iron plate. The number of openings 201 is the same as the number of force transmission rod reserved holes 101. By moving the rectangular iron plate left and right, the openings 201 overlap or misalign with the force transmission rod reserved holes 101, thereby achieving the sealing or opening of the force transmission rod reserved holes 101.

[0027] The vertical side plates of the channel steel are generally quite thick. After the reserved hole is sealed from the outside using the reserved hole sealer 2, the poured concrete will form a protrusion in the reserved hole. The side of the road surface after pouring will be uneven due to the protrusion. To reduce the height of the protrusion, a rectangular groove can be set in the vertical side plate, and a reserved hole can be set in the rectangular groove. Guide slots are set on both sides of the rectangular groove, with one end of the guide slot connected to the side of the rectangular groove and the other end not connected to the side of the rectangular groove, leaving a notch between the side of the rectangular groove and the guide slot for inserting and sealing the iron plate. At the same time, the iron plate at the notch end is bent outward by 90°, and the bent part serves as the handle 202 of the reserved hole sealer 2. By pushing the handle 202, the iron plate is moved horizontally in the guide slot, so that the reserved hole can be closed and opened as needed. The groove can reduce the thickness of the channel steel base plate, indirectly reducing the depth of the pre-reserved hole 101 of the dowel bar, making the concrete bulge after pouring more flat and facilitating post-pouring processing.

[0028] Further as Figure 1 As shown, a push rod 203 is installed at one end of the handle 202 on the rectangular iron plate. The telescopic end of the push rod 203 is fixedly connected to the handle 202 in the form of a vertical plate. The fixed end of the push rod 203 is installed on the steel template 1. The rectangular iron plate is moved by the push rod 203 to block or open the pre-drilled hole 101 of the force transmission rod.

[0029] A shaft hole is vertically provided in the groove of the steel template 1. A bracket 3 is fitted through the shaft hole and can rotate in the shaft hole. The bracket 3 extends outward from the steel template 1. An annular shell 301 is fixed at the end of the bracket 3. A spherical surface is provided on the inner side of the annular shell 301. A freely rotating sphere 302 is fitted through the spherical structure. A vertical through-hole is provided in the center of the sphere 302. An anchor rod 4 is inserted into the ground through the through-hole. Since the sphere 302 can rotate in the annular shell 301, the anchor rod 4 can rotate with the sphere 302 at different tilt angles, thereby fixing the steel template 1 more firmly.

[0030] The shaft hole can be set by using two large nuts, which are welded to the vertical side plate of the channel steel with their screw holes facing each other. The bracket 3 is equipped with a vertical rotating shaft, which is fitted between the nuts, so that the bracket 3 can rotate in the nuts.

[0031] The bracket 3 is a triangular bracket, preferably a right-angled triangular bracket, in which the vertical right-angled side extends to both sides to form a pivot that is fitted between the upper and lower nuts, and the horizontal right-angled side is set on the lower side. The intersection of the hypotenuse and the horizontal right-angled side extends outward laterally, and the extended end is welded to fix the annular shell 301. The annular shell 301 is formed by symmetrically cutting the two sides of the hollow sphere 302.

[0032] High-quality concrete road construction requires segmented pouring, meaning each section is poured separately using steel formwork enclosures. Therefore, adjacent steel formwork sections need to be connected. For example... Figure 2 and 3 As shown, the steel templates of the present invention are connected by end plates 5 at the ends. The ends of the steel templates are provided with pin holes 102 and the end plates 5 are provided with corresponding through holes. Pins 501 are inserted into the pin holes 102 and through holes. The pins 501 are provided with strip holes 502 on their bodies. Trapezoidal pin pieces 503 are inserted into the strip holes 502. Specifically, the end plate 5 is aligned with the pin hole 102 at the end of the steel template. A pin 501 is inserted into the pin hole 102. The slot 502 on the pin 501 protrudes through the steel template on the lower side of the tube. The narrow end of the trapezoidal pin 503 is inserted into the slot 502 on the lower side of the steel template. As the trapezoidal pin 503 is inserted, the width of the pin 503 increases. The two sides of the pin 503 abut against the lower side of the slot 502 of the pin 501 and the lower side of the upper side plate of the steel template, respectively. The end plate 5 and the steel template are tightened and fixed by the ever-widening pin 503.

[0033] like Figure 4-6 As shown, a lifting device 7 is installed on the lower side plate of the steel formwork, a top sleeve is fixed in the middle of the steel formwork, and a square guide tube 702 is set on the lower side plate of the steel formwork. The hole of the fixed sleeve 701 corresponds to the hole of the guide tube 702. A piston sleeve 709 is fitted in the fixed sleeve 701. A stop is set on the lower side of the fixed sleeve 701 to prevent the piston sleeve 709 from slipping out of the fixed sleeve 701. A screw hole is set on the lower side of the piston sleeve 709. The guide sleeve is fitted with... There is an inner sleeve 706 with a threaded hole. A screw 704 is provided between the piston sleeve 709 and the inner sleeve 706. The two ends of the screw 704 are respectively fitted into the threaded holes of the piston sleeve 709 and the inner sleeve 706. A hexagonal threaded sleeve 705 is provided in the middle section of the screw 704. The hexagonal threaded sleeve 705 is fixed to the screw 704. The lower end of the inner sleeve 706 extends below the steel template. A folding pulley 703 is installed at the lower end of the inner sleeve 706.

[0034] The screw 704 is rotated by turning the hexagonal threaded sleeve 705 with a wrench. Since the lower side uses a square guide tube 702, the inner sleeve 706 installed in the guide tube 702 cannot rotate relative to it. The rotating screw 704 moves relative to the inner sleeve 706 by means of the thread. That is, the screw 704 can lift the inner sleeve 706 relative to it or push the inner sleeve 706 relative to it, thereby changing the height of the folding pulley 703 at the lower end of the inner sleeve 706, so as to adjust the elevation of the steel template.

[0035] The folding pulley 703 includes a wheel seat and a roller. The wheel seat is hinged to the lower end of the inner sleeve 706. An arc-shaped notch is provided on one side of the lower end of the inner sleeve 706. The hinged wheel seat can be flipped upwards towards the notch to achieve folding. After the steel template is installed in place, the folding pulley 703 is retracted, and the steel template is supported by the plane at the lower end of the inner sleeve 706. The height of the inner sleeve 706 is adjusted by the screw 704 in the middle to adapt to the elevation of the steel template. When the steel template needs to be dismantled and moved after use, the folding pulley 703 is unfolded, and the steel template is pulled for transfer.

[0036] The specific construction method includes the following steps:

[0037] 1. The concrete road base layer was cleaned, compacted, and leveled, and the elevation was verified to be correct;

[0038] 2. Place the improved new steel formwork required for this construction section on the compacted and leveled base layer;

[0039] 3. The new steel formwork is reinforced by connecting and reinforcing the pre-reserved holes with pins 501 and pin pieces 503 at the ends of the steel formwork.

[0040] 4. Use the triangular bracket 3 for initial fixation. For the parts that need to be reserved for pre-embedded force transmission rods, reserve the force transmission rods through the force transmission rod reserved hole 101. For other parts, seal them through the reserved hole closure device 2 and the closure device adjustment device.

[0041] 5. Use the jacking device 7 to adjust the local elevation of the new steel formwork so that the new steel formwork reaches the design elevation;

[0042] 6. Reinforce and fix the support 3 of the new steel formwork again to make the steel formwork stable and reliable. Finally, pour the concrete for this section of the road and cure it.

[0043] Example 2: The steel formwork is long and narrow. Multiple lifting devices 7 need to be installed on one steel formwork. When adjusting the elevation, multiple lifting devices 7 need to be adjusted one by one. However, manual adjustment cannot guarantee that they are completely level. There will be a small height difference between the lifting devices 7, which will cause some lifting devices 7 to fail to play a supporting role, while other lifting devices 7 will bear greater pressure.

[0044] To avoid the aforementioned errors, the present invention further provides an air chamber 707 structure, which eliminates slight height differences between the lifting devices 7 through interconnected air pressure, enabling the lifting devices 7 to automatically level and evenly distribute the relevant pressure.

[0045] like Figure 5As shown, a sealed air chamber 707 is provided between the fixed sleeve 701 and the piston sleeve 709. The air chambers 707 of the multiple lifting devices 7 are connected through sealed vent pipes 708. In the unpressurized state, the air chamber 707 has the same pressure as the outside environment. After being supported by the steel formwork, the lifting device 7 is subjected to the pressure of the steel formwork. Different pressures will cause the air chamber 707 to be compressed to different degrees. However, the connected structure can distribute and balance the pressure among the multiple air chambers 707. The height of the lifting device 7 can be adjusted by changing the size of the air chamber 707, so that the lifting devices 7 are kept in a consistent position.

[0046] Due to the harsh conditions of road construction, to prevent air leakage from the air chamber 707 and its malfunction, this invention further includes a piston pump 8. The piston pump 8 controls the amount of air in the air chamber 707, keeping it constant. When the pressure in the air chamber 707 drops, the piston pump 8 replenishes the air in the air chamber 707.

[0047] Example 3: The present invention also includes a manual formwork transfer device for dismantling and transporting steel formwork after it has been removed. The manual formwork transfer device includes a rod and a steel cylinder at the end of the rod. One steel cylinder is inserted into the pre-drilled hole 101 of the force transmission rod of the steel formwork, and the other steel cylinder is stuck in the upper part of the steel formwork. Through the combined action of the manual transfer device and the pulley, the steel formwork can be easily pushed and transported to the next construction site for installation and use.

[0048] The above description is merely a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any non-essential modifications, equivalent substitutions, and alterations made to the technical solutions of the present invention should be considered as falling within the scope of protection of the present invention.

Claims

1. An improved steel formwork for concrete roads, characterized in that, The system includes a steel template (1), a pre-reserved hole closure device (2), a bracket (3), an anchor rod (4), an end plate (5), and a lifting device (7). The steel template (1) is made of rectangular channel steel. The vertical side plate of the rectangular channel steel is evenly provided with pre-reserved holes (101) for force transmission rods. The upper and lower sides of the pre-reserved holes (101) for force transmission rods are provided with guide slots. The pre-reserved hole closure device (2) is installed in the guide slots. The pre-reserved hole closure device (2) is a rectangular iron plate. The rectangular iron plate is provided with windows (201) at intervals at the same height as the pre-reserved holes (101) for force transmission rods. The number of windows (201) is the same as the number of pre-reserved holes (101) for force transmission rods. By moving the rectangular iron plate left and right, the windows (201) overlap or are misaligned with the pre-reserved holes (101) for force transmission rods, thereby achieving the sealing or opening of the pre-reserved holes (101) for force transmission rods. A shaft hole is vertically provided in the groove of the steel template (1). A bracket (3) is fitted through the shaft hole. The bracket (3) can rotate in the shaft hole. The bracket (3) extends to the outside of the steel template (1). An annular shell (301) is fixed at the end of the bracket (3). A spherical surface is provided on the inner side of the annular shell (301). A freely rotating sphere (302) is fitted through the spherical structure. A vertical through-hole is provided in the center of the sphere (302). An anchor rod (4) is inserted into the ground through the through-hole. Since the sphere (302) can rotate in the annular shell (301), the anchor rod (4) can rotate at different tilt angles with the sphere (302), thereby fixing the steel template (1) more firmly. The end plate (5) is used to connect the adjacent steel template (1). The end of the steel template (1) is provided with a pin hole (102). The end plate (5) is provided with a corresponding through hole. A pin (501) is inserted into the pin hole (102) and the through hole. A strip hole (502) is provided on the pin body of the pin (501). A trapezoidal pin piece (503) is inserted into the strip hole (502). The lifting device (7) is installed on the lower side of the steel template (1). A top sleeve is fixed in the middle of the steel template (1). A square guide tube (702) is set on the lower side plate of the steel template (1). The fixed sleeve (701) corresponds to the hole of the guide tube (702). A piston sleeve (709) is fitted in the fixed sleeve (701). A screw hole is provided on the lower side of the piston sleeve (709). An inner sleeve (706) is fitted in the guide sleeve. A screw hole is provided in the inner sleeve (706). The piston sleeve (709) A screw (704) is provided between the piston sleeve (709) and the inner sleeve (706). The two ends of the screw (704) are respectively fitted into the screw holes of the piston sleeve (709) and the inner sleeve (706). A hexagonal screw sleeve (705) is provided in the middle section of the screw (704). The hexagonal screw sleeve (705) is fixed to the screw (704). The lower end of the inner sleeve (706) extends below the steel template (1). A folding pulley (703) is installed at the lower end of the inner sleeve (706).

2. The improved steel formwork for concrete roads according to claim 1, characterized in that, A sealed air chamber (707) is set between the fixed sleeve (701) and the piston sleeve (709). The air chambers (707) between multiple lifting devices (7) are connected through a sealed vent pipe (708). Under no pressure, the air chamber (707) has the same pressure as the outside. The air chamber (707) is also connected to a piston pump (8), which controls the amount of air in the air chamber (707).

3. The improved steel formwork for concrete roads according to claim 1, characterized in that, A bent vertical plate is provided at one end of the rectangular iron plate as a handle (202), and the rectangular iron plate is pushed to move left and right by the vertical handle (202).

4. The improved steel formwork for concrete roads according to claim 3, characterized in that, A push rod (203) is installed at one end of a handle (202) on a rectangular iron plate. The telescopic end of the push rod (203) is fixedly connected to the handle (202) in the formwork style of a vertical plate. The fixed end of the push rod (203) is installed on the steel template (1). The rectangular iron plate is moved by the push rod (203) to block or open the pre-drilled hole (101) of the force transmission rod.

5. The improved steel formwork for concrete roads according to claim 1, characterized in that, A rectangular groove is provided on the vertical side plate, and a pre-drilled hole (101) for a force transmission rod is provided in the rectangular groove. Guide slots are provided on both sides of the rectangular groove, and one end of the guide slot is connected to the side of the rectangular groove, while the other end is not connected to the side of the rectangular groove, so that a gap is left between the side of the rectangular groove and the guide slot for inserting a sleeve to seal the iron plate.

6. The improved steel formwork for concrete roads according to claim 1, characterized in that, The bracket (3) adopts a triangular bracket, wherein the vertical side of the triangular bracket extends to both sides to form a rotating shaft fitted between the upper and lower shaft holes, the intersection of the hypotenuses extends laterally outward, and the extended end is welded to fix the annular shell (301). The annular shell (301) is formed by symmetrically cutting the two sides of the hollow sphere (302).

7. The improved steel formwork for concrete roads according to claim 1, characterized in that, It also includes a manual demolding transfer device, which includes a rod and two steel cylinders at the ends of the rod. One steel cylinder is inserted into the pre-drilled hole (101) of the force transmission rod of the steel template, and the other steel cylinder is stuck in the upper part of the steel template (1). The steel template (1) is transferred by the manual transfer device and the folding pulley (703).

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