KR100901397B1 - Mold for curing for a short time of concrete for tunnel and Mold system using thereof - Google Patents

Abstract

The present invention relates to a concrete property curing formwork for tunnels and a formwork system using the same, a plurality of support frames supported by horizontal and vertical beams, coupling members coupled to the outside of each support frame, and the outside of the coupling member In the formwork for the tunnel including a formwork panel is attached to the concrete in contact with the pour and cured concrete, positioned between the support frame and the coupling member is installed to be in direct contact with the hot wire to the formwork panel, for spraying the formwork panel The pipe is installed through the fixing member.

This facilitates the curing of the properties of the concrete while minimizing heat loss through simple components of the heating wire and insulation, and when the entire formwork panel is heated evenly, the temperature in contact with the outside surface of the formwork panel is uniformly maintained by this temperature. Curing the property.

In addition, the cooling water supplied through the watering pipe flows over the formwork panel and permeates the concrete while lowering the formwork panel temperature, thereby overcoming the difference in curing time according to the thickness of the concrete, thereby curing the thickness of the concrete evenly. .

Tunnel, lining concrete, formwork, fast curing, heating wire, coolant

Description

Mold for curing for a short time of concrete for tunnel and mold system using liter}

The present invention relates to a concrete property curing formwork for tunnels and a concrete property curing system using the same, and more particularly, the heat and cooling water is used in the curing process of the lining concrete forming the inner surface of the tunnel, and the property is uniform and overall. The present invention relates to concrete fastening dies for tunnels and concrete fastening systems using the same.

In general, the tunnel construction is excavated where the tracks such as mountains, rocks, underground, etc. are to be passed, and then reinforcement is installed to support the inner wall of the tunnel in which the empty space is formed, and concrete is poured on the inner wall of the tunnel thus supported. The tunnel called is completed.

The concrete lining method which can be cast in the field is mainly used in the process of pouring concrete during the tunnel construction, and the formwork for concrete is used in this lining method.

This conventional concrete concrete formwork for tunnel 10 is, as shown in Figure 1, a plurality of formwork panels 11 are bonded to each other to form a shape similar to the inner surface of the tunnel is interposed a substantially "⊂" shaped coupling member 12 interposed therebetween. It was mounted on the outer side of the support frame 13 in the shape of approximately "Η", and the support frame 13 was supported by a plurality of horizontal beams 14 and vertical beams 15 which are mutually coupled.

Some of the horizontal beams 14 and the vertical beams 15 are equipped with a hydraulic jack 16, the operation of the hydraulic jack 16 is moved to the position of the horizontal beams 14 and the vertical beams 15 finally The support frame 13 was made to be reduced inwardly, and the formwork 10 thus constructed was moved through the roller 17 mounted on the lower side and the rail 18 installed on the ground.

The formwork 10 is installed in the empty space of the tunnel formed by excavation was used for the casting and curing process of the shotcrete 20 and the lining concrete 21.

In order to reduce the curing time of the cast concrete 20,21, the inside of the tunnel was sealed, and the warm air continued to flow inside the tunnel.

However, the curing time of the concrete (20, 21) using the warm air was increased by the prolongation of the construction period, the curing was not done properly, it was determined that the curing was completed, the concrete (10) is moved to the concrete ( A part of 20, 21) fell off.

In order to improve this, as disclosed in Korean Patent Application No. 2005-0003694 (name: concrete curing plate for tunnels and curing system using the same), referring to FIGS. Positioned in the space 19 between the member 12 and the support frame 13 is mounted to the coupling member 12, a plurality of curing plates 30 made to flow the hot water to the coupling member 12 was mounted.

To explain this in more detail, the curing plate 30 has a hot water pipe 32 embedded in a predetermined case 31, and a heat insulating material 33 is charged between the hot water pipe 32 and the case 31. The hot water pipes 32 were in communication with each other through the hot water pipes and the connecting pipes 34 of adjacent curing plates.

The curing plate 30 is continuously disposed so that a separate hot water circulation structure is formed in the space 19 between the coupling members 12 disposed at regular intervals, and among the curing plates 30 having respective hot water circulation structures. The first and last curing plates 30 are directly connected to a boiler (not shown) so that hot water discharged to the boiler can be reintroduced into the boiler.

Therefore, the heat of hot water flowing through the curing plate 30 is transferred to the concrete (20, 21) through the formwork panel 11 to assist in curing the concrete (20, 21).

Although the curing time of the concrete (20, 21) is somewhat shortened by the heat of the hot water by using the curing plate 30, due to the structural problems of the curing plate 30, the effect is insufficient.

For that reason, the heat of the hot water flowing into the hot water pipe 32 is transferred to the heat insulating material 33, and the heat of the heat insulating material 33 is transferred to the case 31, and then the concrete is heated through the heated formwork panel 11. As it is transferred to (20, 21), the heat of the hot water is lost during the transfer to the concrete (20, 21). Because the heat of the hot water is transferred to the concrete (20, 21) by raising the temperature not only the heat insulating material 33, but also the case 31, the formwork panel 11, the heat insulating material 33 and the case 31, the formwork panel The rest other than the heat lost by (11) was transferred.

In addition, the temperature difference between the temperature of the hot water discharged from the boiler and the temperature of the hot water when flowing into the boiler may be large due to the temperature drop by the thermal insulation material 33 and the case 31 while the hot water flows through the plurality of curing plates 30. There was nothing but a difference in temperature between the concrete (20, 21) site cured by hot water discharged from the boiler and the concrete (20, 21) site cured by hot water immediately before entering the boiler. There was a problem that incomplete curing can be made for each part.

The present invention has been made to solve the above problems, the heating wire is located in the space between the support frame and the coupling member and installed to be adjacent to or in contact with the formwork panel, and the switchboard controlled by the controller to energize the heating wire By including this, since the formwork panel is heated by the heating wire, rapid curing is achieved, and the heat of the heating wire is transferred to the formwork panel evenly, so that the heat loss is minimized, so that all parts of the concrete with an even temperature rise over the entire area of the formwork panel. The purpose of the present invention is to provide a concrete curing property formwork for the tunnel to be uniformly cured of the concrete and the concrete curing property system using the same.

In addition, the sprinkling pipe is installed inside the holding member attached to the concrete side on the outer side of the formwork panel, and a water pump controlled by a controller for supplying cooling water to the watering pipe is included, thereby the concrete close to the formwork panel It is another object of the present invention to provide a concrete curing property formwork for the tunnel and the concrete curing property system using the same so that the cooling water is wetted on one side of the heating wire to remove the difference in curing time according to the distance and distance, that is, the concrete thickness.

Concrete property curing molds for tunnels according to the present invention for achieving the above object, a plurality of support frames supported by a horizontal beam and a vertical beam, a coupling member coupled to the outside of each support frame, and the coupling member In the formwork for the tunnel comprising a formwork panel is attached to the outside of the concrete in contact with the pour and cured concrete, is located between the support frame and the coupling member is made so that the hot wire is in direct contact with the formwork panel.

Insulating material is provided to surround the heating wire to prevent the heat loss of the heating wire while the heating wire is in direct contact with the formwork panel, the insulation is preferably a urethane foam, the urethane foam wraps the heating wire of the auxiliary member attached to the formwork panel It is preferable to be filled inside, and may be filled outside of the auxiliary member in which the heating wire is built according to the working environment.

In addition, a fixing member is mounted on the outer side of the formwork panel to the concrete side, and a watering pipe is built into the fixing member, and the cooling water discharged from the watering pipe passes through the fixing member and flows to the outer surface of the formwork panel. .

At this time, the watering pipe is formed with a watering hole, the distribution hole is formed in the lower end of the fixing member so that the cooling water discharged through the watering hole flows along the outer surface of the formwork panel.

On the other hand, the tunnel concrete consisting of a switchboard connected to the electricity is supplied to the heating wire wrapped with the heat insulating material, a water pump and the controller connected to supply the cooling water for curing to the sprinkling pipe, and a controller for controlling the operation of the switchboard and the water pump. Rapid curing curing system is achieved.

Here, the hot wire is preferably made of one strand of a straight line in the longitudinal direction of the coupling member, or may be arranged to bend to enlarge the contact area with the formwork panel.

The heat insulator should be used as a member that can withstand the heat emitted from the hot wire, and does not retain heat so that the heat of the hot wire is transferred to the formwork panel. It is preferable to use urethane foam mixed in a constant ratio.

In addition, a separate auxiliary member may be installed so that the urethane foam surrounds the heating wire, and as an example of using the auxiliary member, the urethane foam may be filled outside the auxiliary member when the heating wire is wrapped, and the inside of the auxiliary member Hot wire and urethane foam may be arranged.

In the formwork system, the switchboard is installed to use electricity used in the tunnel construction site, and the controller for controlling the switchboard controls the temperature of the heating wire according to the temperature of the heating wire, the conduction time of the heating wire and the conduction time.

On the other hand, the sprinkling hole of the sprinkling pipe is preferably formed in the formwork panel side portion, the distribution hole of the fixing member is to be formed to be in contact with the joint portion with the formwork panel or the distribution hole is not made separately and the fixing member and Cooling water may be discharged to the formwork panel through some open areas of the formwork's seams.

In addition, a water pump installed to supply the cooling water to the sprinkling pipe is installed in conjunction with the controller, the controller controls the supply of the cooling water, the supply duration and the interval of supply time.

Here, the controller may be installed so as to control the switchboard and the water pump at the same time, or may be installed to separately control the switchboard and the water pump.

Tunnel concrete curing properties according to the present invention configured as described above and the formwork system using the same to assist the curing properties of the concrete while minimizing the heat loss through a simple component of the heating wire and insulation, and the predetermined temperature in the formwork panel When the heat is transferred directly through the heating wire, the entire formwork panel is uniformly and quickly heated, and the temperature of the heated formwork panel makes the concrete in contact with the outer surface of the formwork panel evenly cure the property as a whole.

In addition, the concrete properties curing formwork for the tunnel and the formwork system using the same, the cooling water supplied through the watering pipe mounted on the outer surface of the formwork panel penetrates the concrete while lowering the temperature of the formwork panel, thereby curing according to the concrete thickness The difference in time is overcome and curing is made evenly with respect to the thickness of concrete, and the poor curing such as cracking on some parts and crumbly curing due to the difference in curing time depending on the thickness of the concrete is easily detached by external pressure. There is another effect that is prevented.

Hereinafter will be described in detail with reference to the accompanying drawings, concrete property curing formwork and formwork system for tunnels preferably carried out in accordance with the present invention. Here, again the description of the generally used formwork shown in FIG. 1 for easier description of the formwork according to the invention.

Figure 4 is an enlarged view schematically showing the main part of the concrete property curing formwork for tunnels according to a preferred embodiment of the present invention, Figures 5 and 6 is another embodiment of Figure 4, Figure 7 is shown in Figure 4 FIG. 8 is a schematic view showing a formwork system using major parts of concrete fastening formwork for tunnels, and FIG. 8 is an enlarged view schematically showing a sprinkling pipe mounted to concrete fastening formwork for tunnels shown in FIG. 4. 9 is a configuration diagram schematically showing a formwork system using the sprinkling pipe shown in FIG. 8.

First, referring to FIG. 1, a general formwork is mounted on one surface of a plurality of formwork panels 11 bonded to each other to form a shape similar to an inner surface of a tunnel. The other side of the coupling member 12 is mounted on the outer side of the support frame 13 having a shape of approximately “Η”, and the support frame 13 is connected to a plurality of horizontal beams 14 and vertical beams 15 which are mutually coupled. Is supported by.

Some of the horizontal beam 14 and the vertical beam 15 is equipped with a hydraulic jack 16, the operation of the hydraulic jack 16, the horizontal beam 14 and the vertical beam 15 is moved inward as the support Frame 13 is also made to be reduced inwardly, the formwork 10 is configured to move through the roller 17 mounted on the bottom and the rail 18 installed on the ground.

When the formwork 10 is installed in an empty space of a tunnel formed by excavation, the formwork panel 11 is spaced apart from the inner surface of the tunnel at a predetermined interval, and then the shotcrete 20 and the lining concrete 21 are formed. Concrete 20, 21 is poured in one or more places.

Here, after the shotcrete 20 is poured and cured so that a predetermined insulation 22 is interposed between the shotcrete 20 and the lining concrete 21, the insulation 22 is attached, and the insulation 22 is attached. Lining concrete 21 is poured into the inner surface of the curing.

After the concrete 20 and 21 is poured, a predetermined heat is applied for rapid curing, and the heat is transmitted by the heating wire 100 directly contacting the formwork panel 11 as shown in FIG. 4. do.

The heating wire 100 is installed in direct contact with or close to one surface of the formwork panel 11 while being positioned in the space 19 between the support frame 13 and the coupling member 12.

The heating wire 100 is installed by the heat insulator 110 so that the heating wire 100 is in contact with one surface of the formwork panel 11 in the space 19 between the support frame 13 and the coupling member 12.

In addition, in order to assist the heating wire 100 in contact with the formwork panel 11, as shown in FIGS. 5 and 6, the heating member 100 is positioned inside, and then an auxiliary member mounted to the formwork panel 11 ( 120 may be used.

The auxiliary member 120 may be a curved shape as shown in the figure, may be manufactured in a curved shape, and the hot wire 100 to be in close contact with the formwork panel 11 or to maintain a minimum separation distance Any shape can be provided as long as it can be, may be made of one long, or may be made of a plurality of short and arranged at regular intervals.

In addition, as shown in FIG. 5, the heat insulating material 110 may be installed outside the auxiliary member 120 while only the heating wire 100 is positioned inside the auxiliary member 120, or as shown in FIG. 6. The heating wire 100 and the heat insulator 110 may be installed inside the 129, and the heating wire 100 may be in direct contact with the formwork panel 11 or maintain a minimum separation distance.

On the other hand, the heat insulator 110 to withstand the heat emitted from the heating wire 100 to ensure that the heat of the heating wire 100 is transmitted to the formwork panel 11 evenly, to satisfy this, a predetermined additive is mixed in a specific ratio It is preferable that it is a urethane foam made up.

When the heat insulator 110 is urethane foam, the space 19 should be filled and sealed after the heating wire 100 is located therein, and a similar environment is made even when the auxiliary member 120 is used.

Here, the hot wire 100 may be arranged in a single straight line in the space 19, may be arranged in a winding shape for expanding the contact with the form panel 11 and the expansion of the heat transfer site, one space It may be arranged continuously from 19 to another space 19. However, when the heating wire 100 is long, since the heat loss increases, it is preferable that the heating wire 100 is arranged to have a short length in the space 19 as much as possible. Here, the one space refers to a place partitioned by a pair of coupling member 12 and the support frame 13 as shown in the figure, in the case of the other space is a neighboring space of this one space To talk.

Meanwhile, referring to FIG. 7, a predetermined switchboard 200 is installed to allow electricity to the heating wire 100, and the controller 210 controlling the operation of the switchboard 200 is linked with the switchboard 200. It is installed as possible.

The switchboard 200 is generally installed so as to use the electricity used in the tunnel construction site, it is preferable that the connection of the switchboard 200 and the heating wire 100 is a separate connection member 220 is used.

The controller 210 controls the temperature and energization time and interval of the hot wire 100 and the temperature change of the hot wire 100 at each energization time and interval through the switchboard 200.

The concrete 20, 21 is uniformly and quickly cured as a whole, and in order to satisfy the conditions such as the strength of the concrete (20, 21), the heating wire 100 is continuously heated for about 16 hours while being set at a temperature of about 30 ~ 60 ° Done. Of course, the change in the set temperature according to the working environment and the outside temperature is natural, and the temperature change according to the intermittent energization and energization time is also possible.

Meanwhile, referring to FIGS. 4 to 7 and 8, a fixing member 130 is attached to the concrete side outer surface of the formwork panel 11, and a watering pipe 140 is installed inside the fixing member 130. .

The sprinkling pipe 140 is formed with a plurality of sprinkling holes 142 in the die panel 11 side portion to discharge the cooling water introduced, it is preferable that the distal end is sealed.

In addition, the fixing member 130 is for fixing the sprinkling pipe 140 and protecting it from the concrete (20, 21), may be a conventional crack guide member, if the crack guide member is not used It is manufactured and installed separately.

The fixing member 130 has a distribution hole 132 is formed so that the cooling water discharged through the watering hole 142 flows to the outer surface of the formwork panel 11, the distribution hole 132 is a fixing member 130. It is preferable that the plurality of contact portions of the formwork panel 11 are formed in a predetermined shape.

In addition, it may be naturally formed through the open joint portion of the fixing member 130 and the formwork panel 11 without separately manufacturing the distribution hole 132.

In this case, the open joint portion refers to an open portion in which the inner and outer parts of the fixing member 130 communicate with each other except the joint portion sealed by the intermittent joining of the fixing member 130 and the formwork panel 11. Alternatively, when the fixing member 130 is mounted to the formwork panel 11 by bolting, all the contacted portions of the fixing member 130 and the formwork panel 11 may be open joint portions.

In addition, the cooling water discharged to the formwork panel 11 through the sprinkling pipe 140 is permeated to one surface of the concrete (20, 21) in close proximity to the formwork panel 11, which is cured concrete (20, 21) By being shrunk and spaced apart from the formwork panel 11 by a predetermined interval, the cooling water is evenly penetrated to one surface of the concrete 20, 21 through the spaced apart.

Here, the cooling water is to minimize the difference in curing temperature of one side of the concrete (20, 21) heated by the heating wire 100 and the opposite side of the one side, that is, the thickness of the concrete (20, 21) through the cooling water This prevents cracks that may occur due to differences in curing time.

That is, the uniform curing according to the area of the concrete (20, 21) is supplemented by the hot wire 100, the uniform curing according to the thickness of the concrete (20, 21) is complemented by the cooling water.

On the other hand, Figure 9, the watering pipe 140 is installed so that the cooling water is supplied from the separately provided water pump 230, a separate supply hose 240 may be interposed.

In addition, the water pump 230 is installed in conjunction with the controller 210 to control the supply time of the cooling water, the interval of the supply time, the supply duration.

In this case, one controller 210 may be installed so as to control the switchboard 200 and the water pump 230 at the same time, or two to be installed in the switchboard 200 and the water pump 230, respectively, to allow independent control. It may be installed.

Here, the water pump 230 is controlled by the controller 210 such that the coolant is supplied for several minutes at an interval of one hour after 5 hours after the concrete 20 and 21 are cured by shrinking. Here, the watering duration is set to allow the cooling water to sufficiently wet the concrete (20, 21), approximately 10 minutes is appropriate.

At this time, the heat of hydration of the concrete (20, 21) is controlled so that the cooling water can be supplied to be maintained at approximately 40 ℃, the range of the hydration heat may be controlled to have a 30 ~ 80 ℃ depending on the degree of curing property.

Hereinafter, the concrete concrete curing formwork for the tunnel and the formwork system using the same according to the present invention will be briefly described by the operating sequence.

First, when the formwork 10 is installed and the concrete 20, 21 is poured and cured, the switchboard 200 is operated by the controller 210 so that the heating wire 100 is energized. The formwork panel 11 is released to be heated evenly at all sites, and the heat of the heated formwork panel 11 is transferred to the concrete 20 and 21 in the curing process to achieve uniform and rapid curing as a whole.

In this case, the controller 210 controls the switchboard 200 by inputting a condition such as an intermittent or continuous electricity supply method, an electricity supply time, and a temperature change of the heating wire 100 according to the electricity supply time.

In addition, the heating wire 100 is in a state of directly contacting the formwork panel 11 by the heat insulator 110 or having a minimum separation distance, and the heat insulator 110 heats the heat wire 100 in the formwork panel 11. It does not hold the heat of the heating wire 100 while being transmitted to all.

On the other hand, the concrete (20, 21) to be cured by the heat of the heating wire 100 is contracted after a predetermined time elapsed to form a gap between the formwork panel 11, at this time is supplied from the water pump 230 Cooling water discharged from the sprinkling pipe 140 flows over the formwork panel 100 through the gap and permeates the concrete 20, 21. In addition, the cooling water flowing over the formwork panel 100 cools the holding temperature while preventing the excess temperature rise of the formwork panel 100.

Evenly curing according to the thickness of the concrete (20, 21) can be made by the coolant to lower the temperature of the formwork panel 100 while seeping into the concrete (20, 21), which is dependent only on the heating wire 100 Part of the concrete (20, 21) that can be generated at the time of the cracks caused by excessive curing and crumbs are easily removed by the external pressure.

1 is a front view schematically showing a concrete formwork for a tunnel that is generally used,

2 and 3 are a perspective view and a cross-sectional view schematically showing the main parts of the conventional concrete formwork for tunnels,

4 is an enlarged view schematically showing a portion in which a hot wire is mounted in a concrete curing curing form for tunnels according to an exemplary embodiment of the present invention;

5 and 6 is another embodiment of FIG.

7 is a configuration diagram schematically showing a formwork system using the heating wire shown in Figures 4 to 6,

FIG. 8 is an enlarged view schematically showing a sprinkling pipe mounted on the concrete fastening formwork for the tunnel shown in FIG. 4;

FIG. 9 is a schematic view showing a formwork system using the sprinkling pipe shown in FIG. 8.

<Explanation of simple signs for the main parts of the drawings>

10 ... formwork 11 ... formwork panel,

12 support frame 13 fastening member,

100 ... heat insulation 110 ... insulation material,

120 auxiliary member 130 fixing member

140 ... sprinkling pipe 200 ...

210 ... Controller 230 ... Water Pump.

Claims (8)

A tunnel comprising a plurality of support frames supported by horizontal and vertical beams, a coupling member coupled to the outside of each support frame, and a formwork panel attached to the outside of the coupling member and in contact with the concrete to be poured and cured. In the formwork for the dragon, The formwork panel is positioned between the support frame and the coupling member to be heated by a heating wire, A fixing member is mounted on the outer side of the formwork panel to the concrete side, and a watering pipe is embedded inside the fixing member, and the cooling water discharged from the watering pipe is installed to flow through the fixing member to the outer surface of the formwork panel. Curing formwork for concrete properties for tunnels. The method of claim 1, Concrete property curing form for tunnels, characterized in that the insulation is installed to surround the hot wire to prevent the heat loss of the hot wire while the hot wire is in direct contact with the formwork panel. The method of claim 2, The thermal insulating material is a tunnel concrete curing properties, characterized in that the urethane foam. The method of claim 3, The urethane foam is a concrete property curing form for tunnels, characterized in that the filling inside the auxiliary member attached to the formwork panel while wrapping the hot wire. The method of claim 3, The urethane foam is a concrete curing property formwork for the tunnel, characterized in that the heating wire is filled in the outside of the auxiliary member. delete The method of claim 1, The sprinkling pipe is formed in the sprinkling pipe, the concrete concrete curing mold for tunnels, characterized in that the distribution hole is formed in the lower end of the fixing member so that the cooling water discharged through the sprinkling hole flows along the outer surface of the formwork panel. A concrete curing property formwork for tunnels according to any one of claims 1 to 5 and 7, a switchboard installed in association with electricity to the heating wire, and a water pump installed in association so that the cooling water for curing is supplied to the sprinkling pipe. And a controller for controlling the operation of the switchboard and the water pump.

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