KR101286851B1 - The removal method of form freezing - Google Patents

Abstract

PURPOSE: A mold freezing removing method is provided to remove freezing generated on a mold or a surface of a reinforcing bar arranged on the mold due to low temperature by injecting vapor. CONSTITUTION: A high pressure boiler (20), an oil tank (60), make-up water (40), and a pump are fixed in a meshed casing (10). The meshed casing is lifted by a crane and is arranged by being closely located to the frozen mold. An opening door (10a) of the meshed casing is opened so that the high pressure boiler is individually connected to a connection hose, a hose connection divergence unit, and a trigger sprayer. A power source is turned on in order to drive the high pressure boiler and the pump. A water supply valve and a spray valve are opened, and each valve is operated in order to supply the make-up water to the high pressure boiler. The trigger spray is closely attached to a frozen part of the surface of the mold and a reinforcing bar and removes the freezing by spraying the vapor. The mold and the reinforcing bar are wrapped by a heat insulating material in order to keep warm. Concrete is place on the mold after the heat insulation material of the mold and the reinforcing bar are removed, and the concrete is cured by wrapping the concrete with a curing fabric and blocking external air.

Description

The Removal Method Of Form Freezing

The present invention relates to a method for removing form freezing, and more particularly, to a form freezing removing method that enables concrete pouring by melting and removing freezing generated in formwork due to low temperature during building construction in winter.

Conventionally, concrete is built by placing concrete in formwork required for building construction, but especially in winter, without removing snow from snow due to the problem of reinforcing steel reinforced to formwork and formwork due to the fall of the climate. When concrete is poured directly, it is difficult to expect sufficient durability and watertightness of concrete.

Therefore, in order to solve the above problems, in removing the ice snow generated on the formwork and the surface of the reinforcing steel reinforcement to the formwork, the ice snow is generally melted and removed using a cryoprotectant.

For example, calcium chloride, a widely used chemical used as a cryoprotectant, is used to remove ice snow.However, iron materials such as rebar have problems of steel corrosion and sand is used to increase friction, but sand is excessively used. This can delay the development of concrete strength, increasing the probability of collapse of the structure.

In addition, if there is snow or freezing in the reinforcing bars assembled into the formwork or formwork, the snow or ice is removed by heating with a torch. In Korea, the use of flames is extremely limited in terms of fire prevention, so it is practically impossible to use them even in violation of regulations.

In addition, there is a case in which it is dissolved in water to remove the ice snow, at this time there is a high risk that the load increases and acts as a risk of collapse.

In winter, due to cold weather, the voids in the ground easily freeze and expand. This phenomenon causes ground deformation or collapse. In particular, when the ground is submerged due to the deformation, the possibility of collapse of temporary structures and formwork groups installed on the ground is increased.

When removing ice snow in the same way as described above, various defects (cracking, drying shrinkage, breakage) occur in the cast concrete is taken for granted.

Therefore, in order to solve the problems as described above, there is a registration Patent No. 10-687210 (Patent Document 1) to spray the snow melt to prevent freezing, but still the snow melt concrete is poured And Patent Nos. 10-763416 (Patent Document 2) and registered patents, which are used to arrange and cause problems by reacting with and disposing the electric heating wire 220 that melts and melts inside the formwork, which is different from Patent Document 1. Although No. 10-763419 (Patent Document 3) has been presented, these technologies also have a problem that can lead to a fire caused by a short circuit and an electric shock accident in the worker's work process, there is a technical limitation.

Patent Document 1 Registration No. 10-687210 Patent Document 2 Registration No. 10-763416 Patent Document 3 Registration No. 10-763419

In solving the above-mentioned problems, the form freezing removing method according to the present invention, the concrete required by melting the snow or ice generated in the formwork required for building construction and the reinforcing steel reinforcement to the form by melting or melting with steam using a high-pressure boiler The purpose is to provide the appropriate requirements for casting.

In addition, the purpose is to reduce the defects (cracking, drying shrinkage, breakage) that can occur in the poured concrete by melting or melting with steam.

In addition, the purpose is to comply with the building code regulations while avoiding the risk of fire by not using the same method as heating due to the occurrence of fire specified in the building code.

Formwork freezing removal method of the present invention to achieve the above object,

A first step of fixing the high pressure boiler, the pump, the replenishment water, and the oil tank inside the mesh casing;

A second step of lifting the mesh casing with a crane and placing the mesh casing close to the frozen formwork;

A third step of opening and closing the opening and closing door of the mesh casing to connect and install a connection hose, a hose connection mechanism, and a trigger sprayer to the high pressure boiler;

A fourth step of turning on the power so that the high pressure boiler and the pump can be operated, and opening and setting the water supply valve and the discharge valve of the high pressure boiler to operate and set the respective valves so that the water of supplemental water is supplied to the high pressure boiler;

A fifth step of bringing the trigger sprayer into close proximity to the freezing portion generated in the formwork or the rebar surface to melt and remove the freezing while spraying steam;

A sixth step of maintaining the insulation by wrapping the formwork or reinforcement with insulation to prevent freezing of steam injected into the formwork or reinforcing steel which is removed from being frozen;

Removing the thermal insulation material in the formwork or reinforcing bars, and then placing concrete in the formwork to surround the curing cloth to keep warm while blocking external air to achieve concrete curing; It is characterized by comprising.

In addition, in the third step, the connection hose, hose connection branch mechanism, the trigger sprayer connected to the ejection pipe of the high pressure boiler, characterized in that connected to each other by the connection of the adapter.

In addition, in the third step, the hose connection nozzle mechanism uses a Y-type hose connection nozzle mechanism having two jet ports or a hose connection jet mechanism having more than the number of jet nozzles, and uses a trigger jet as a steam injection means. do.

In addition, in the fourth step, the water supply check valve and the water supply stop valve are used together, but the water supply stop valve is installed on the high pressure boiler side and the water supply check valve is installed on the pump side to repair the water supply check valve due to the trapped impurities in the water supply. The task is added.

As described above, the form freezing removal method of the present invention can achieve concrete pouring even in winter by removing the freezing of snow or ice generated in the surface portion of the formwork and the reinforcing bar reinforced to the formwork with steam. It has an effect.

In addition, by removing the freezing portion of the snow or ice with steam there is an effect that can reduce the defects (cracking, drying shrinkage, breakage) that can occur in the poured concrete to maintain sufficient durability and rigidity of the concrete.

In addition, it does not use a method such as heating having a fire risk prescribed in the Building Act, thereby complying with the Building Code and providing an environment suitable for concrete placement immediately before concrete placement.

1 is a fixed installation of the high-pressure boiler and the supplementary water in the casing according to the method for removing the form freezing of the present invention.
Figure 2 is a transfer diagram for lifting the casing to the frozen formwork with a crane according to the formwork freezing removal method of the present invention.
Figure 3 is a connection installation of the hose, hose connection mechanism, the trigger injector to the high pressure boiler in the casing according to the method of eliminating the form freezing of the present invention.
Figure 4 is a setting diagram for manipulating each valve of the high pressure boiler according to the die freezing method of the present invention.
5 is a steam injection diagram for melting the die freezing according to the method of removing the form freezing of the present invention.
Figure 6 is a thermal insulation coating to the freezing formwork reinforcement according to the formwork freezing removal method of the present invention.
Figure 7 is a concrete pouring state in the formwork removed formwork according to the method of eliminating the formwork of the present invention.

The method for removing form freezing according to the present invention, in order to solve the problems of concrete placing caused by the freezing of snow or ice on the formwork and the reinforcing bar in the formwork in winter to remove the freezing with steam concrete It provides a suitable environment to maintain the durability and rigidity of the poured concrete.

Hereinafter, with reference to the accompanying drawings will be described in detail.

(S1) Fixed installation of high pressure boiler and refill water and oil tank in casing.

As shown in FIG. 1, an oil tank 60 for supplying oil as a combustible material to the high pressure boiler 20 and the high pressure boiler 20 and supplemental water 40 for supplying water to the high pressure boiler 20. And a pump 30 for supplying the water of the supplemental water 40 to the high pressure boiler 20 in the mesh type casing 10, the bolt 30 and the support plate 12 installed on the top of the frame 11. The joining fixation by welding is achieved.

(S2) Lift the mesh casing with frozen formwork with a crane.

As shown in FIG. 2, the mesh casing 10 in lifting the mesh casing 10 fixing the high pressure boiler 20, the replenishment water 40, the oil tank 60, and the pump 30 to the crane is connected to the mesh casing 10. The steel wire is connected to the fastening ring 13 provided at the top to lift the mesh casing 10 with a crane so as to be placed close to the frozen formwork 70.

When the distance to the frozen formwork 70 is long, the mesh casing 10 is lifted by a crane and mounted on a truck, and after the movement of the truck, the mesh casing 10 is lifted by a crane and frozen. To be placed close to the formwork (70).

(S3) Installation of connecting hose, hose connector, and trigger sprayer to the high pressure boiler in the casing.

As shown in FIG. 3, the opening and closing door 10a of the mesh casing 10 disposed close to the frozen formwork 70 opens the connection hose 25 to the ejection pipe 24 of the high pressure boiler 20. The connection by (26a) is made.

If it is necessary to extend the connection hose 25 or need to quickly remove the frost formed on the surface of the formwork 70 or the reinforcing bar 71, the hose connection split mechanism 26 is extended to extend the connection hose 25. It is connected to the connection hose 25 again, and in this case, the connection is made by fastening the adapter 26a.

In one embodiment, the hose connection splitting mechanism 26 is formed in two types of Y-shaped hose connecting splitting mechanisms 26. The hose connecting splitting mechanism 26 may be a hose connecting splitting mechanism having two or more jetting openings. . In other words, this has the advantage that frost removal can be achieved quickly.

After fastening the adapters 26a to the two ejection outlets in the ejecting direction of the hose connecting device 26 again, connecting the connecting hoses 25 again, respectively, and then triggering the sprayers 27 to the respective connecting hoses 25. Connect it.

(S4) Setting by operating each valve of the high pressure boiler.

As shown in FIG. 4, after the power is turned on to drive the high pressure boiler 20 and the pump 30, the water supply valve 21 and the blowoff valve 23 of the high pressure boiler 20 are opened to make up the supplemental water. The operation of each valve is performed so that the water of 40 is supplied to the high pressure boiler 20.

As the water supply valve 21, the water supply check valve 21b and the water supply stop valve 21a are used in combination. The water supply stop valve 21a is connected to the high pressure boiler 20, and the water supply check valve 21b is connected to the pump 30. Install. That is, the water supply check valve 21a is easily operated due to the principle that impurities (foreign substances) in the water supply are caught between the valve and the valve seat when the check valve is closed. This is to allow the water supply check valve 21b to be repaired by closing the stop valve 21b.

(S5) Melt and remove the freezing of formwork and rebar using the trigger injector.

As shown in FIG. 5, each trigger sprayer 27 connected to the ejection pipe 24 direction of the high-pressure boiler 20 is brought close to the freezing portion generated on the surface of the formwork 70 or the reinforcement 71. By pulling the trigger of (27) to inject steam, the freezing of the surface of the formwork 70 or the reinforcement 71 is melted and removed.

(S6) Insulating material coating on the formwork bar removed icing.

As shown in FIG. 6, since the remaining amount of steam injected due to the low temperature of the winter remains in the formwork 70 or the reinforcing bar 71 which is frozen, it may be solidified and frozen again when it is left as it is. Prevents freezing of moisture.

In other words, when placing concrete, keep the temperature in the range of 5 ~ 20 ° C so that initial freezing does not occur considering weather conditions.

(S7) Concrete placing in the formwork removed icing.

Remove the insulation of the formwork (70) and the reinforcing bar (71) to create a suitable condition for concrete placement, then cast concrete on the formwork (70) wrapped in a curing cloth (sheet, vinyl, etc.) to expect the warming effect while blocking the outside air To achieve concrete curing.

In other words, the temperature during curing of the concrete is maintained at about 10 ~ 20 degrees, but the temperature change during the curing period is continuously observed and recorded through the self-temperature, hygrometer, the lowest and the lowest thermometer, and the automatic recording thermometer. Do it.

This completes the form freezing removal method of the present invention by implementing and maintaining concrete having durability and rigidity.

DESCRIPTION OF THE REFERENCE SYMBOLS
10: mesh casing 10a: opening and closing door
11 frame 12 support plate
13: fastening ring
20: high pressure boiler 21: water supply valve
21a: Water supply stop valve 21b: Water supply check valve
22: water supply pipe 23: ejection valve
24: spout pipe 25: connection hose
26: hose connection mechanism 27: trigger sprayer
30: pump
40: replenishment water 50: water tank
60: oil tank
70: formwork 71: rebar

Claims (4)

A first step of fixing the high pressure boiler 20, the pump 30, the supplemental water 40, and the oil tank 60 in the mesh casing 10;
A second step of lifting the mesh casing 10 with a crane and placing the mesh casing 10 close to the frozen formwork 70;
A third step of opening and closing the opening and closing door 10a of the mesh casing 10 to connect and install the connection hose 25, the hose connection mechanism 26, and the trigger sprayer 27 to the high pressure boiler 20, respectively;
The power is turned on so that the high pressure boiler 20 and the pump 30 can be operated, and the water supply valve 21 and the ejection valve 23 of the high pressure boiler 20 are opened, so that the water of the supplemental water 40 is connected to the high pressure boiler ( A fourth step of manipulating and setting each valve so as to supply the water to 20);
A fifth step of bringing the trigger sprayer 27 close to the freezing portion generated on the surface of the die 70 or the reinforcing bar 71 to melt and remove the freezing while spraying steam;
A sixth step of wrapping the formwork 70 or reinforcing bar 71 with a heat insulating material to maintain the warmth to prevent the steam injected into the formwork 70 or the reinforcing bar 71 from being frozen and solidified again;
Removing the thermal insulation material in the formwork 70 or the reinforcing bar 71, and then placing concrete in the formwork 70 to surround the curing cloth and keep warm while blocking the outside air to achieve concrete curing;
Formwork freezing removing method characterized in that it comprises a. The method of claim 1, wherein in the third step, the connecting hose 25, the hose connecting mechanism 26, and the trigger sprayer 27 connected to the ejection pipe 24 of the high pressure boiler 20 are connected to the adapter 26a. Formwork freezing removing method characterized in that each connected to each other. The method of claim 2, wherein in the third step, the hose connecting nozzle mechanism 26 uses a Y-type hose connecting nozzle mechanism having two jet ports or a hose joint jet mechanism having more than the number of jet nozzles. Formwork elimination method, characterized in that using (27). The water supply check valve 21b and the water supply stop valve 21a are used together in the fourth step, and the water supply stop valve 21a is connected to the high pressure boiler 20. 21b) is installed on the pump (30) side of the formwork removal method, characterized in that the repair work of the water supply check valve (21b) due to the trapping of impurities in the water supply is added.

Images