KR102254254B1 - Unit Form of Slip Form with Heating Apparatus - Google Patents

Abstract

The present invention relates to a slip form heating apparatus for constructing a vertical unit including a unit form adjacent to a mold in which a placement material supplied to form a wall of the vertical unit is stored. The slip form heating apparatus includes: a plate placed with at least one part opposed to the wall; and a heating part placed between a plurality of supporters, and placed with one side in surface contact with the plate. The heating part includes: waterproof tape installed on the plate; a planar heat emission film attached to the waterproof tape, and provided to enable selective heat emission; and an insulation material stacked on the planar heating film to prevent heat emitted by the planar heat emission film from being delivered to the outside.

Description

Unit Form of Slip Form with Heating Apparatus}

The present invention relates to a slip foam heating device for vertical sphere construction, and the slip foam unit form provided with a heating unit for providing an optimal concrete curing environment in order to shorten the construction time of the vertical sphere wall in the vertical sphere construction process. It is about.

In recent years, as the construction of deep tunnels using urban underground spaces or common wards to accommodate public facilities has increased for the three-dimensional development of cities, construction of a vertical shaft as a maintenance passage and ventilation holes after construction during construction. Cases are increasing.

Such a vertical hole excavates the excavation hole in the vertical direction from the ground, pours concrete on the bottom of the excavation hole to form the bottom surface, and then installs a formwork along the inner circumferential surface of the excavation hole from the bottom of the excavation hole and pours concrete It is constructed in the order of forming a vertical wall by repeating the process.

In forming the vertical wall of the vertical sphere, in the past, the formwork was installed at the location where the vertical wall was formed, and after concrete was poured, the formwork was dismantled, reassembled and installed at the next working position, and then concrete was poured. Was used, but recently the slip foam method is widely used.

Slip form refers to a form applied to the construction method of completing a structure by continuously assembling reinforcing bars and pouring concrete while raising the formwork upward when the strength of concrete becomes more than the strength to stand on its own after pouring concrete. Here, the time required for the concrete to become more than the strength to be self-sufficient is considerable, and the time required for concrete curing has a great influence on the construction period and the cost of construction.

Therefore, shortening the curing time in the process of constructing the vertical sphere is required to implement the device because it is possible to proceed with effective construction in terms of cost and time.

Korean Registered Patent Publication No. 10-1745645 Korean Patent Publication No. 10-1915277 Korean Patent Publication No. 10-1920049 Korean Registered Patent Publication No. 10-2006289

The present invention is a unit equipped with a heating unit that allows the concrete forming the vertical sphere wall to be quickly cured in order to quickly secure the strength that can raise the slip form in the construction of the vertical sphere wall by the slip foam method. To provide a form.

Since the curing speed of the concrete forming the vertical sphere wall influences the construction period and quality, the present invention is to shorten the construction period of the vertical sphere wall and improve the construction quality.

In addition, the present invention is to provide a structure of a heating unit that can be simply and easily installed on the slip foam in consideration of the structural characteristics of the slip foam.

In addition, by specifically limiting the material of each laminate constituting the heating unit, it is intended to present conditions for forming an optimal heating environment.

The present invention relates to a heating device for providing an optimal curing environment to a slip foam used for construction of a vertical ball, and a heating unit is provided on a unit form corresponding to a unit form in the slip foam device. The unit form is a formwork provided radially toward the drilling hole in the intermediate workbench of the slip form, wherein the unit form includes a plate disposed on the outermost side in a direction opposite the inner wall of the vertical sphere; A plurality of supports disposed horizontally so as to connect both ends of the plate in the horizontal direction; And a heating unit provided between the supports and disposed in surface contact with the inside of the plate.

The heating unit may include a waterproof tape that adheres the surface heating film to the plate and exhibits waterproof performance to protect the surface heating film and prevent failure due to a short circuit; A planar heating film adhered to the waterproof tape and provided to enable selective heat generation; It is laminated on the planar heating film to block the heat generated by the heat generated by the planar heating film is transmitted to the outside; comprises a.

The waterproof tape should have a moisture absorption of 1.0% or less in an environment of 23±2 °C and a relative humidity of 50±5%, a 180° pull-off adhesive strength of 7.0 N/10mm or more, and a tensile strength of 25 N/10mm or more. And, the results of the heat resistance test for 150 hours at 150±2 °C, the cold resistance test for 24 hours at -30±2 °C, and the moisture resistance test for 24 hours at 60±2 °C and 95±2% relative humidity were 0.1 It is preferably mm or less.

It is preferable that the planar heating film has an emissivity of 0.850 or more in an environment at a temperature of 40° C., ^{and a radiation energy of 3.50×10 2} W/m 2 ·µm or more.

The heat insulating material preferably has a thermal conductivity of 0.04 W/(m·K) or less, a tensile strength of 15.0 N/cm 2 or more, and an absorption rate of 0.001 g/cm 3 or less, and a tensile strength of 22 kgf/mm 2 or more on both sides of the heat insulating material, It may be coated with a film having an elastic modulus of 420 kgf/mm 2 or more and a heat shrinkage of less than 1.2%.

The heating unit may generate heat through electricity supply by connecting an electric wire to the inside of the planar heating film, and a sensor unit is installed on one side facing the wall to measure the heating temperature.

The plurality of supports are composed of a first support, a second support, and a third support that are sequentially arranged to be spaced apart from the top by a predetermined distance, and the heating section and the second support which are a section between the third support and the second support Is divided into a non-heating section, which is a section between the first supports, and the heating section may be provided only in the heating section, and the heating section is formed on the lower side of the plate longer than the non-heating section.

In the present invention, since the unit form is provided with a heating unit, it is possible to quickly cure the concrete to secure the strength of the wall, thereby securing the curing quality and shortening the construction period of the vertical sphere.

In addition, since the present invention has a simple structure to install the heating unit on the unit form of the slip form, there is no need to go through a complicated assembly and disassembly process.

In addition, by limiting the heating unit provided in the uniform to a part in consideration of the situation at the construction site of the vertical sphere, it is possible to reduce unnecessary waste of materials, thereby increasing the efficiency.

1 is a side cross-sectional view showing a state in which a unit form according to the present invention is connected to a slip form in a vertical sphere;
2 is a plan view showing a state in which the unit form according to the present invention is connected to a slip form in a vertical sphere;
3 is a view showing a state in which a heating unit is coupled to the unit form according to the present invention;
4 is a view showing heat transfer from the heating unit according to the present invention to the wall side,
5 is a view showing that the unit form according to the present invention transfers heat by contacting the wall;
6 is a view showing the heating range of the heating unit according to the present invention.

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. However, this is only an example and the present invention is not limited thereto.

In describing the present invention, when it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout the present specification.

The technical idea of the present invention is determined by the claims, and the following embodiments are only one means for efficiently describing the technical idea of the present invention to those of ordinary skill in the art.

1 is a side cross-sectional view showing a state in which a unit form 100 according to an embodiment of the present invention is provided in a slip form 1 in a vertical sphere, and FIG. 2 is a side cross-sectional view showing a state in which the unit form 100 slips in a vertical sphere. It is a plan view showing the state of being joined to the intermediate workbench of the foam.

Referring to FIG. 1, the slip form 1 according to the present invention is lowered into the inside of an excavation hole previously formed for construction of a vertical ball, and a vertical ball is constructed as it rises. The excavation hole and the vertical sphere may be formed in a circular shape, and the planar shape of the slip foam 1 used for this may be a circular shape corresponding to the diameter formed by the excavation surface W, but depending on the design cross section, it may be rectangular in addition to the circular shape. May be.

The outer edge of the slip form (1) is provided with an H-beam that forms the skeleton of the slip form while combining the intermediate work platform (10) and the upper work platform (30) in a vertical direction, which is called a yoke (31), and a hydraulic jack on one side of the yoke. (OP) is provided and the slip form 1 rises along the rod (L) by the operation of the hydraulic jack (OP). Although not shown in FIG. 1, a lower worktable for finishing the exposed wall and working with a bracket is usually installed under the intermediate worktable 10.

As shown in Figure 2, the yoke 31 is provided with a unit form 100 in the direction of the excavation surface (W). The unit form 100 is a formwork provided radially toward the excavation hole from the intermediate working table 10 of the slip foam 1, and the unit forms 100 are connected to each other to form the inner wall line of the vertical ball wall. The vertical sphere wall is constructed by pouring concrete between the surface and the unit form 100 and curing the poured concrete.

When the poured concrete is cured to secure a certain strength or more, a hydraulic jack is operated to raise the slip form, and a continuous operation is possible by placing concrete between the excavation surface and the unit form 100 at an elevated position. The curing speed is the key to determining the duration and speed of the construction of the vertical sphere.

The present invention is to provide a good curing environment by providing a heating device in the unit form of such slip foam.

In the present invention, a heating unit 110 is provided on the unit form 100 of a metal material, and the heat generated from the heating unit 110 is indirectly transferred to the wall W through a uniform plate of metal material. .

In this regard, the unit form 100 will be described in more detail with reference to FIGS. 3 to 6 below.

3 is a view showing a state in which the heating unit 110 is provided in the unit form 100 according to an embodiment of the present invention.

The unit form 100 includes a vertical member 125, a plurality of supports and plates 120 extending in the horizontal direction.

The vertical member 125 is a'C'-shaped channel disposed in the center and extending upward, and is coupled to the yoke inward and is also coupled with a horizontal member extending from the yoke on the upper side, so that the unit form 20 is attached to the intermediate workbench. Firmly bonded.

The plate 120 is disposed on the outermost side in a direction facing the inner wall of the vertical sphere. In addition, the plurality of supports are disposed horizontally so as to connect both ends of the plate 120 in the horizontal direction, and a first support 131, a second support 132, and a third support 133 may be provided from the top. The support may be arranged such that a gap between the second support 132 and the third support 133 is formed wider than the distance between the first support 131 and the second support 132.

The coupling between the plate 120 and the support may be made by coupling portions 126a at both ends of the plate 120. The coupling portion 126a is a bent elongated member, and may be positioned at both ends of the plate 120 in the horizontal direction so as to connect both ends of the plate 120 in the vertical direction. The bonding may be achieved through fasteners or the like (not shown).

Referring to FIG. 3, the unit form 100 according to the present invention includes a plate 120, a support extending in the horizontal direction to the plate 120, and a heating unit 110. The plate 120 is a metal material, and the heating unit 110 is provided on the inside of the plate 120, and a concrete wall is formed on the outside of the plate.

For reference, in the present invention, the inner side of the plate refers to the direction in which the intermediate working table of the slip foam is located with respect to the plate, and the outer side of the plate refers to the direction of the excavation surface on which concrete is placed based on the plate.

In the present invention, the heating unit is provided inside the plate 120 so that heat generated from the heating unit is transferred to the wall through the plate. Conventionally, by arranging the heating unit on the outside of the plate to transfer heat directly to the concrete, it has been the cause of frequent failures in the heating unit as the heating element and the heat transfer element come into contact with moisture. 120) to solve this problem.

The heating unit 110 may not be disposed over the entire surface inside the plate 120, but may be disposed on a partial surface. For example, it may be arranged for an area corresponding to 3/5 of the entire surface. Here, the area corresponding to 3/5 is only an example if it means that it can be disposed in more than half of the area.

In addition, the heating unit 110 has an area extending from the bottom to the top, and an arrangement area may be determined. Specifically, when the entire surface of the plate 120 is defined as the entire section D1 based on the vertical direction, the third support 133 and the first support 131 are formed at the lowermost and uppermost ends of the plate 120, respectively. 120) can be combined. This is provided for the purpose of reinforcing the plate 120 and as a means for fixing the plate 120 to the work table 10. However, between the first support 131 and the third support 133, a second support 132 of the entire section D1 may be further disposed. The second support 132 is disposed in a horizontal direction and may divide the entire section D1 into upper and lower portions.

Here, the two sections divided by the second support 132 are the non-heating section D3, which is a section between the first support 131 and the second support 132, and the second support 132 and the third support 133. ) Can be divided into a heating section (D2). Here, the heating section D2 means a section based on a vertical direction in which the heating unit 110 can be coupled. In addition, the heating section (D2) occupies more weight than the non-heating section (D3) in the entire section (D1). In other words. The second support 132 may be positioned closer to the first support 131 than the third support 133 from the middle of the entire section D1.

In this way, not having a heating part on the entire inner surface of the plate, and limiting the installation section of the heating part to a part of the lower part reflects the site situation of the slip foam construction. That is, when concrete is poured on the intermediate workbench of the slip foam, concrete is not poured up to the height of the first support on the top of the plate, but some spare sections are provided.

4 is a view showing through a cross section (C) that heat is transferred from the heating unit 110 to the wall (W) according to an embodiment of the present invention.

Referring to FIG. 4, the heating unit 110 is formed of a plurality of laminates. Specifically, the heating unit 110 is configured to include a waterproof tape 113, a surface heating film 112, and a heat insulating material 111.

The waterproof tape 113 adheres the surface heating film 112 to the plate 120 and exhibits waterproof performance to protect the surface heating film 112 and prevent failure due to a short circuit. For example, butyl waterproofing Tape can be used.

The waterproof tape 113 must bond a surface heating film to the plate 120 while preventing and waterproofing a short circuit, and certain conditions must be satisfied considering a poor working environment in which vertical spheres are constructed with slip foam. In an environment where the moisture absorption amount is 23±2°C and 50±5% relative humidity, 1.0% or less is preferable, the 180° pull-off adhesive strength is 7.0 N/10mm or more, and the tensile strength is 25 N/10mm or more. In addition, the result of a heat resistance test for 150 hours at 150±2 °C, a cold resistance test result for 24 hours at -30±2 °C, and the results of a moisture resistance test for 24 hours in an environment of 60±2 °C and 95±2% relative humidity. Flowing down (distance flowed by attaching the sample to the STS304 test plate and melted) should be less than 0.1mm.

The planar heating film 112 is a KFIA-FI-1005 test method in a pre-set temperature condition environment, preferably a 40°C temperature condition environment, has an emissivity of 0.850 or more, and ^{radiates 3.50×10 2} W/㎡·㎛ or more It is preferable to apply the energy-bearing film type. Like the planar heating film 112, a uniform temperature can be delivered to the plate 120 through the heating form in the form of a film, and the wall (W) (the poured object side) through the plate 120 delivers a uniform temperature. I can receive it. Accordingly, the heating unit 110 in the form of a planar heating element applied to the unit form 100 of the present invention can transmit uniform heat to the wall W for a heat transfer area.

Insulation material 111 may be formed of expanded polyethylene, expanded polystyrene, urethane foam, urea foam, phenolic foam, etc., the thermal conductivity is 0.04 W/(m·K) or less, the tensile strength is 15.0 N/cm 2 or more, while the absorption rate Silver is preferably 0.001 g/cm 3 or less.

If the film is coated on both sides of the insulation, the insulation performance can be further improved.The film used for this purpose is to select and coat a film with a tensile strength of 22 kgf/mm2 or more, an elastic modulus of 420 kgf/mm2 or more, and a heat shrinkage of less than 1.2%. desirable.

The heat insulating material 111 is laminated on the planar heating film 112 so that the heat generated by the planar heating film 112 is not released to the atmosphere (A), and with respect to the heat insulating material 111, through FIG. 5 below. Let's be specific.

The waterproof tape 113, the planar heating film 112, and the heat insulating material 111 are preferably configured to have a thickness ratio of 1:0.4:5.

5 is a view showing the unit form 100 according to an embodiment of the present invention in contact with the concrete wall (C) to transfer heat.

Referring to FIG. 5, the heating unit 110 may be disposed with the wall C with the plate 120 interposed therebetween. The plate 120 interposed between the wall C and the heating unit 110 may be formed of a metal material to transfer heat transferred from the heating unit 110 to the wall W by conduction. Heat generated from the surface heating film 112 may be transferred to the outside of the plate, and the heat insulating material 111 is laminated on the inner surface of the surface heating film 112 in a direction other than the direction in which the insulating material 111 is disposed. Heat can be transferred, and thus the heat transfer direction HD is formed toward the wall C.

By blocking the heat from being emitted to the atmosphere (A) by the heat insulating material 111, the heat transferred to the heat insulating material 111 can further increase the thermal efficiency generated by the surface heating film 112. This heat is uniformly transferred from the planar heating film 112 to the wall (C), so that the degree of curing can be uniformly adjusted.

6 is a view showing a heating range (S) of the heating unit 110 according to an embodiment of the present invention.

Referring to FIG. 6, the curing conditions are expressed in terms of temperature and time, and in curing, a condition in which time decreases as temperature increases and temperature decreases as time increases may be established. When the predetermined temperature range or time range is determined, the other temperature or time condition is determined. Determinants of such time and temperature can be determined by the user in consideration of the strength of the concrete according to the curing result. This is because the strength of the required concrete can be determined in various ways, so the temperature range of the first temperature (T1) to the second temperature (T2), which is a predetermined temperature, or the first time (H1) to the second time (H2), which is a predetermined time. Can be set arbitrarily.

According to the illustrated graph, a heating range S is formed according to a predetermined time range and a temperature range, and the heating unit 110 may generate heat within the heating range S. A control unit (not shown) may be further included to maintain the heating range S. That is, the control unit is installed on one side facing the wall (C) in order to generate heat through electricity supply by connecting a wire inside the planar heating film 112 to enable the measurement of the heating temperature (not shown) ) By controlling the heating unit 110 to generate heat within a predetermined temperature range or a heating range S determined according to a time range.

Furthermore, the control unit may linearly increase the temperature of the heating unit 110 to a target heating temperature. When the temperature increases non-linearly, there is a section that increases rapidly, as this can cause a phenomenon in which moisture from the concrete is rapidly removed, resulting in a decrease in strength as a result of curing. Accordingly, the control unit can increase the temperature to the target temperature linearly in the temperature-time graph.

Meanwhile, for such control, the controller may receive feedback of temperature information from a sensor unit (not shown). The temperature can satisfy the time condition in the illustrated temperature-time graph by measuring the temperature transmitted to the curing unit and transmitting it to the control unit. The sensor unit may be a sensor unit through non-contact temperature sensing.

Although the exemplary embodiments of the present invention have been described in detail above, those of ordinary skill in the art to which the present invention pertains will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should not be determined by the claims to be described later, but also by those equivalents to the claims.

1: slip foam 10: intermediate workbench
100: unit form 110: heating unit
111: insulation 112: surface heating film
113: waterproof tape 120: plate
131: first support 132: second support
133: 3rd support D2: heating section
D3: Non-heating section HD: Heat transfer direction

Claims (10)

As a unit form provided radially from the intermediate workbench of the slip foam toward the drilling hole,
The unit form, a plate disposed on the outermost side in a direction facing the inner wall of the vertical sphere; A plurality of supports disposed horizontally so as to connect both ends of the plate in the horizontal direction; And a heating unit provided between the supports and disposed in a state of surface contact with the inside of the plate,
The plurality of supports are composed of a first support, a second support, and a third support that are sequentially arranged to be spaced apart from the top by a predetermined distance,
It is divided into a heating section, which is a section between the third support and the second support, and a non-heating section, which is a section between the second support and the first support,
Unit form of slip foam having a heating unit, characterized in that the heating unit is provided only in the heating section The method according to claim 1,
The heating unit,
A waterproof tape that protects the surface heating film by adhering the surface heating film to the plate and exhibits waterproof performance and prevents failure due to a short circuit;
A planar heating film adhered to the waterproof tape and provided to selectively generate heat;
An insulating material laminated on the planar heating film to block heat generated by the planar heating film from being transferred to the outside. The method according to claim 2,
The waterproof tape,
In an environment of 23±2°C and 50±5% relative humidity, the water absorption is 1.0% or less, the 180° peel-off adhesive strength is 7.0 N/10mm or more, and the tensile strength is 25 N/10mm or more. The unit form of the equipped slip foam. The method according to claim 2,
The waterproof tape,
Heat resistance test at 150±2 °C for 150 hours, cold resistance test at -30±2 °C for 24 hours, and moisture resistance test for 24 hours at 60±2 °C and 95±2% relative humidity. Characterized in that, the unit form of the slip foam having a heating unit. The method according to claim 2,
The planar heating film,
A unit form of slip foam with a heating unit, characterized in that it has an emissivity of 0.850 or more in an environment at a temperature of 40°C ^{and a radiation energy of 3.50×10 2 W/m²·µm or more.} The method according to claim 2,
The insulating material,
A unit form of slip foam having a heating part, characterized in that the thermal conductivity is 0.04 W/(m·K) or less, the tensile strength is 15.0 N/cm 2 or more, and the water absorption rate is 0.001 g/cm 3 or less. The method of claim 6,
The heat insulating material is a unit form of slip foam having a heating portion, characterized in that a film having a tensile strength of 22 kgf / mm 2 or more, an elastic modulus of 420 kgf / mm 2 or more, and a heat shrinkage rate of 1.2% or less is coated on both sides of the insulating material. The method according to claim 2,
The heating unit,
A slip foam unit having a heating unit, characterized in that heat generation is possible through electricity supply by connecting a wire inside the planar heating film, and a sensor unit is installed on one side facing the wall to measure the heating temperature. Form. delete The method according to claim 1,
The heating section, characterized in that formed on the lower side of the plate longer than the non-heating section, the unit form of the slip foam having a heating unit.

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