KR101131798B1 - Sports court structure using prestress and construction method thereof - Google Patents

Abstract

PURPOSE: A court for physical training facilities and a construction method thereof are provided to suppress the generation of crack. CONSTITUTION: A construction method of a court for physical training facilities is constituted as follows. A rectangular base layer is formed(S10). A gravel layer is formed on the upper part of the base layer(S20). A polyethylene sheet is installed on the upper part of the gravel layer(S30). A mold is installed on a concrete applying part of the polyethylene sheet(S40). A first tendon and a first reinforcement steel are installed(S50). A second tendon and a second reinforcement steel are installed(S60). Concrete slab is formed(S70). Prestress is introduced into the concrete slab(S80). The end of the second tendon and first tendon are fixed(S90). A floor side suitable for a sports game is formed(S100).

Description

Sports court using prestress and construction method {Sports court structure using prestress and construction method

The present invention relates to a coat for a sports facility with a prestress and a construction method thereof, and more particularly, to reinforce the strength of the coat for a sports facility installed for various sports events, to suppress the occurrence of cracks, expansion and contraction of concrete To provide a structure and a construction method of the court for athletic facilities that can cope with.

In general, a sports facility court has a variety of uses, such as tennis, basketball, volleyball, football, athletics, as well as indoor and outdoor playgrounds, auditoriums, and playgrounds.

These athletic facility courts needed to be firmly formed to be subjected to constant vibrations and loads from a number of participants. Therefore, most athletic facility coats were made of concrete, and then the upper surface was wrapped with urethane, artificial turf, or acrylic to complete the athletic facility coat.

However, the concrete floor has a problem that cracks may occur due to the occurrence of tensile stress due to the volume change of the concrete and repeated expansion and contraction by the temperature and humidity difference.

In order to solve this problem, the existing concrete floor surface was constructed by forming a plurality of spaced gaps in a predetermined position to cope with the contraction and expansion of the concrete. However, in order to form a large number of spaced gaps, the construction must be performed while accurately predicting the strength of concrete, but this process was cumbersome, and sanitary problems such as decay due to dirt or foreign matter stuck between the spaced gaps. In addition, the concrete upper surface is usually packaged with urethane, artificial turf or acrylic, etc. In the expansion and contraction process of the concrete, urethane or acrylic or artificial turf, etc., such as the crying or breakage occurred.

On the other hand, in order to increase the strength of concrete and prevent cracks in concrete pavement on bridges and roads, a prestressed concrete pavement method is applied, in which a tendon is inserted into the concrete and then tensioned. As prior art for this, it can be confirmed through Korean Patent No. 847726 (name: prestressed concrete pavement structure and its construction method).

However, in the process of repeating expansion and contraction due to temperature and humidity difference, tensile stress occurs due to the volume change of concrete. At this time, the expansion and contraction rate is different because the temperature of the upper and lower layers of concrete is different. In the existing prestressed concrete pavement method, the expansion and contraction rates due to different temperature changes are not considered, and there is a problem that cracks may still occur in the concrete layer.

In addition, since there was no case where prestressed concrete method was applied to increase the strength of the floor surface and prevent cracking in the athletic facility court, the concrete construction method for the athletic facility court where the strength was improved without cracking by using and applying the prestressed concrete method Was required.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, the athletic facility coat and the pre-stressed concrete method that introduced the tensile force in consideration of the expansion and contraction of the concrete in the process of construction of the concrete floor surface and its It is an object of the present invention to provide a construction method.

In addition, the present invention is another object of the present invention to improve the strength of the concrete layer while reducing the construction cost by reducing the thickness of the concrete layer, and to provide a coat for a sports facility and a construction method thereof that prevents cracking and damage.

It is another object of the present invention to provide a coat for a sports facility and a method of constructing the same so that a constant stress acts on concrete having different expansion and contraction rates due to a temperature difference according to a depth direction of a concrete layer.

As a technical means for achieving the above object, the present invention introduces a pre-stressed concrete method in the construction of a coat for a sports facility, dispersing the stress by lattice arrangement of tendons, the long direction for the rectangular court is tendon upward The unidirectional arrangement of the rectangular coat provides a technique in which the tendons are placed downward so that a constant stress is applied.

In addition, the construction method of the coat for the sports facilities introduced prestress according to the present invention, excavation and ground clearance step (S10)-> gravel layer forming step (S20)-> PE sheet installation step (S30)-> formwork installation step (S40) )-> The first tendon and the first reinforcing bar installation step (S50)-> the second tendon and the second reinforcing bar installation step (S60)-> concrete laying and curing step (S70)->Tendon's tensile step (S80) -> Finishing step of the tendon anchorage (S90)-> Provides a technique comprising a bottom surface forming step (S100) of the athletic facility court.

According to the coat for a sports facility incorporating prestress according to the present invention and a construction method thereof, in consideration of different tensile stresses and strains according to the depth direction of the concrete slab, the tendons are divided so that uniform compressive stress due to prestress is applied. Deflection phenomenon does not occur in the concrete, thereby suppressing the occurrence of tensile stress has the effect that the crack does not occur in the concrete.

In addition, since the strength of the concrete slab is improved, it is possible to construct a concrete slab, which is usually constructed in a thickness of 15 to 20 cm, to a thickness of 10 cm, thereby reducing construction costs.

1 is a block diagram of a construction method of a coat for a sports facility incorporating prestress according to the present invention,
Figure 2 is a plan view of a coat for a sports facility incorporating prestress according to an embodiment of the present invention,
Figure 3 is a side cross-sectional view of a coat for a sports facility incorporating prestress according to an embodiment of the present invention.

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

1 is a block diagram of the construction method of the coat for a sports facility incorporating prestress according to the present invention, Figure 2 is a plan view of a coat for a sports facility incorporating prestress according to the present invention, Figure 3 is a prestress in accordance with the present invention This is a side cross-sectional view of the court for sports facilities.

As described above, the coat for the sports facility incorporating the prestress according to the present invention includes the ground layer 10, the gravel layer 20, the PE sheet 30, the concrete slab 90, and the floor surface 100 of the coat for the sports facility. ) Are laminated to each other, and a plurality of first tendons 50 and second tendons 70 are arranged in a lattice form inside the concrete slab 90 to generate tensile force, thereby reinforcing the strength of the concrete slab 90. In order to prevent the occurrence of cracks, a plurality of first reinforcing bars 60 and second reinforcing bars 80 are installed between the plurality of first tendons 50 and the second tendons 70 to uniformly distribute the stress. Function

The first tendon 50 and the second tendon 70 are fixed after being pulled from a hydraulic jack (not shown) after the curing process of the concrete slab 90, this configuration is the first tendon 50 and the first Both ends of the two tendons 70 penetrate through holes formed in the fixing holes 52 and 72, and then wedges 51 and 71 formed at both ends of the first tendons 50 and the second tendons 70. Is fixedly coupled to maintain the tensile force. In addition, since the first tendon 50 and the second tendon 70 is composed of a plurality of PS steel wire or PS stranded wire, the configuration of the first tendon 50 and the second tendon 70 is already known, so Detailed description will be omitted.

In addition, the first tendon 50 and the second tendon 70 according to the present invention, depending on whether or not to generate a tensile force in one direction or in both directions, the end of the landfill fixed to the concrete slab 90 The portion that is not embedded in the concrete slab 90 is determined to be drawn out in the tension working space 42 of the tendon so as to generate a tensile force by a hydraulic jack (not shown).

As described above, the construction method of the coat for a sports facility incorporating the prestress according to the present invention, excavation and ground clearance step (S10)-> gravel layer forming step (S20)-> PE sheet installation step (S30)-> formwork installation step ( S40)-> the first tendon and the first reinforcing bar installation step (S50)-> the second tendon and the second reinforcing bar installation step (S60)-> concrete laying and curing step (S70)->Tendon's tensile step (S80) )-> Finishing step of the tendon anchorage (S90)-> the bottom surface of the athletic facility coat forming step (S100) is made.

1) the ground clearance stage (S10)

The ground layer 10 is formed by excavating a predetermined depth or stacking soil on a rectangular surface having a width and a vertical width that correspond to a general stadium court shape. The surface of the ground layer 10 is evenly arranged.

2) gravel layer forming step (S20)

After the ground ground cleaning step (S10), by forming a gravel on the ground layer 10, the gravel layer 20 is formed. It is preferable to form the gravel layer 20 to a thickness of about 20cm as a configuration for evenly dispersing the stress is pressed from the top. At this time, when the thickness of the gravel layer 20 exceeds 20cm, the construction cost is increased and economic efficiency is lowered, and when the thickness of the gravel layer 20 is less than 20cm, the ground may be affected by freezing.

3) PE sheet installation step (S30)

After the gravel layer forming step (S20), the PE (Polyethylene: polyethylene) sheet is installed on the gravel layer 20. The PE sheet 30 formed as described above prevents water from being absorbed into the gravel layer 20 even when a crack occurs in the concrete slab 90. This is to block the cavitation that may occur when moisture is absorbed into the gravel layer 20 to prevent the concrete slab 90 from falling down and falling down or sagging.

In addition, the PE sheet 30 reduces the mutual friction between the concrete slab 90 and the lower gravel layer 20. This is to prevent the possibility of cracking in the concrete slab 90 due to the restraint stress caused by the frictional force with the lower gravel layer 20 during the expansion and contraction of the concrete slab (90). It can be reduced.

4) Formwork installation step (S40)

After the PE sheet installation step (S30), install the formwork 40 for the concrete installation site. At this time, the formwork 40 is installed while forming a border with respect to the concrete installation site, each formwork 40 is formed with a plurality of tendon through-holes 41, the ends of the tendons (50, 70) described later formwork ( 40) to be withdrawn to the outside.

In addition, by forming a tension working space 42 of the tendon on the outside of the formwork 40, a tensioning operation using a hydraulic jack (not shown) with respect to the tendon 50 and 70 drawn out through the tendon through-hole 41. It was possible to carry out.

In addition, the tension working space 42 of the tendon may be formed in both directions or in one direction with respect to both sidewalls of the opposing form, which is whether the installed tendon undergoes a two-way tensioning or one-way tensioning. Is determined accordingly.

5) Installing the first tendon and the first reinforcing bar (S50)

After the formwork installation step (S40), the PE sheet 30, the first tendon 50 and the first reinforcing bar 60 is installed. At this time, the first tendon 50 and the first reinforcing reinforcement 60 is the first tendon 50 and the first reinforcement with respect to the short width direction of the coat installation site of the rectangular athletic equipment having a length and width different from each other Rebar 60 is installed first.

In addition, the first tendons 50 and the first reinforcing bars 60 are installed through a plurality of support members (not shown) to be installed at a position spaced apart from the upper portion of the PE sheet 30. The first reinforcing bar 60 is to be mounted.

The plurality of first tendons 50 are installed to form a spaced apart from each other, which is installed for the function of reinforcing the strength of the concrete slab 90 and to suppress the occurrence of cracks, a plurality of first tendons ( A plurality of first reinforcing bar 60 is installed in the spaced space between 50, which serves to distribute the stress acting downward.

The first tendon 50 is disposed so that one end of the tendon is embedded in the concrete slab 90 and the other end of the formwork 40 depends on whether the tendon is subjected to one-way tensioning or two-way tensioning. It is drawn out through the tendon through-hole 41 formed in the side wall and disposed in the tension work space 42 of the adjacent tendon, or both ends of the tendon are drawn out through the tendon through-hole 41 formed in the side wall of the formwork 40 It was arranged to be placed in the tension work space 42 of the adjacent tendon so that the tension work can be performed.

6) installing the second tendon and the second reinforcing bars (S60)

After the first tendons and the first reinforcing bars (S50), the first tendons 50 and the first reinforcing bars 60 installed in correspondence with the short width direction, the second tendons 70 and the second reinforcing bars ( 80) is laminated. At this time, the second tendon 70 and the second reinforcing reinforcement 80 is the second tendon 70 and the second reinforcement with respect to the long width direction of the rectangular ground coat installation site having a different length and width Reinforcing bar 80 is installed.

In addition, the plurality of second tendons 70 are formed to form a spaced apart from each other, which is to be installed for the function of reinforcing the strength of the concrete slab 90 and to suppress the occurrence of a plurality of second tendons ( A plurality of second reinforcing bars 80 are installed in the spaced space between 70, which serves to distribute the stress acting downward.

The second tendon 70 is arranged so that one end of the tendon is embedded in the concrete slab 90 and the other end of the formwork 40 depends on whether the tendon is subjected to one-way tensioning or two-way tensioning. It is drawn out through the tendon through-hole 41 formed in the side wall and disposed in the tension work space 42 of the adjacent tendon, or both ends of the tendon are drawn out through the tendon through-hole 41 formed in the side wall of the formwork 40 It was arranged to be placed in the tension work space 42 of the adjacent tendon so that the tension work can be performed.

As described above, the first tendons 50 and the second tendons 70 arranged in a lattice form are installed to reinforce the strength of the concrete slab 90 and to suppress the occurrence of cracks. ) And the second reinforcing bar 80 serves to uniformly distribute the stress acting downward.

In addition, as described above, the first tendons 50 and the first reinforcing bars 60 are installed first to support the short width direction while being positioned below the second tendons 70 and the second reinforcing bars 80 later. The installed in the upper side to support the long width direction is because the temperature of the upper and lower parts of the concrete slab 90 is different and thus the expansion and contraction rates are different. That is, since the temperature change on the upper side of the concrete slab 90 is large, the expansion rate and shrinkage rate are greatly generated. This may cause the concrete slab 90 to sag downward when the high temperature expansion, because it may cause cracking of the concrete due to the concentration of stress, it was necessary to pull the long width direction reliably. Accordingly, the second tendon 70 is positioned at the inner upper portion of the concrete to support the long width direction, and the first tendon 50 is positioned at the inner lower portion of the concrete to support the short width direction to achieve a stable balance.

7) Concrete laying and curing step (S70)

After the tendons and rebar installation steps (S50, S60), concrete is provided in the first and second tendons (50, 70) and the first and second reinforcing bars (60, 80) arranged in a grid in the formwork (40). Install. At this time, the thickness of the laid concrete slab 90 is preferably 10cm, when the thickness of the concrete slab 90 exceeds 10cm, the construction cost increases, the economical efficiency is lowered, the thickness of the concrete slab 90 is less than 10cm In this case, the construction is difficult and there is a risk of cracking and breakage.

In this case, if the first tendon 50 and the second tendon 70 undergo one-way tensioning, one end of the tendon is disposed to be embedded in the concrete slab 90, and the other end is tendon formed on the sidewall of the formwork 40. It is drawn through the through-hole 41 and placed in the tension work space 42 of the adjacent tendon, the tension work space 42 of the tendon so as not to install concrete. In addition, if the first tendon 50 and the second tendon 70 undergoes bidirectional tensioning, both ends of the first tendon 50 and the second tendon 70 may be tendon through holes formed on the sidewall of the formwork 40. 41) to be drawn out and placed in the tensioning workspace 42 of the adjacent tendon, and the tensioning workspace 42 of the tendon does not install concrete.

The concrete laid in this way is required to be cured and the period of time ranges from 3 days to 28 days depending on various environmental conditions or the properties of concrete.

8) Tendon's tensile stage (S80)

After the concrete laying and curing step (S70), the process of tensioning the first tendon 50 and the second tendon 70 embedded in the concrete is continued. That is, the ends of the first tendon 50 and the second tendon 70 located in the tension working space 42 of the tendon are tensioned using a hydraulic jack (not shown) to allow the prestress to be introduced into the concrete slab. At this time, after tensioning the first tendon 50 and the second tendon 70, the wedges 51 and 71 coupled to the first tendon 50 and the second tendon 70 are anchorages 52 and 72. The tension is maintained without loosening.

9) Finishing stage of tendon anchorage (S90)

After the tensioning step (S80) of the tendon, the end fixing unit (52, 72) of the first tendon 50 and the second tendon 70 is fixed in the tension working space 42 of the tendon, tension of the tendon The interior space of the work space 42 may be filled with cement or mortar, or finished with a separate cover.

10) Formation of the bottom surface of the athletic facility court (S100)

After the finishing step (S90) of the tendon anchorage, the concrete slab upper surface to form a bottom surface suitable for sports events, by applying a surface layer material corresponding to urethane, artificial turf, acrylic-based elastic materials, or various coating materials Make sure to close it.

As described above, although the technical idea of the present invention has been described with reference to the preferred embodiments, those skilled in the art will be able to vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Can be modified and changed.

10: ground layer 20: gravel layer
30: PE sheet 40: formwork
41: through the tendon 42: Tendon's tensile work space
50: First Tendon 51, 71: Wedge
52, 72: anchorage 60: first reinforcing bar
70: second tendon 80: second reinforcing bar
90: concrete slab 100: floor surface of the sports facilities court

Claims (4)

Forming a rectangular ground layer 10 having different widths and vertical widths (S10);
Forming a gravel layer 20 on the ground layer 10 (S20);
Installing a PE sheet 30 on the gravel layer 20 (S30);
Installing the formwork 40 for the concrete installation site on the upper side of the PE sheet 30 (S40);
Installing a first tendon (50) and a first reinforcing bar (60) with respect to a short width direction among rectangular installation parts surrounded by the formwork (40);
Installing a second tendon (70) and a second reinforcing bar (80) with respect to a long width direction among rectangular installation sites surrounded by the formwork (S60);
The first tendon 50 and the first reinforcing reinforcement 60 is installed on the lower side, and the concrete is installed and cured in the interior space of the formwork 40 in which the second tendon 70 and the second reinforcing reinforcement 80 are installed on the upper side. Thereby forming a concrete slab 90 (S70);
Tensioning the first tendon (50) and the second tendon (70) so that prestress is introduced into the concrete slab (S80);
Fixing the ends of the first tendon (50) and the second tendon (70) after the stretching process (S90);
Prestressing, comprising: forming a bottom surface suitable for a sporting event by applying any one method of urethane, artificial turf, elastic material, coating material to the upper surface of the concrete slab (90); Construction method of introduced sports facility court.
Ground layer 10;
A gravel layer 20 installed to evenly disperse the stress pressurized on the ground layer 10;
A PE sheet 30 installed to block moisture from being absorbed into the gravel layer 20 on the gravel layer 20 and to reduce frictional force between the concrete slab 90 and the gravel layer 20;
A concrete slab 90 installed on the PE sheet 30;
The floor surface 100 of the athletic facility coat made of a surface layer of any one of urethane, artificial turf, elastic material, coating material to be installed on the concrete slab 90 to form a bottom surface suitable for sports events; Including,
Inside the concrete slab 90, a plurality of first tendons 50 supporting the short width direction from the lower side and a plurality of second tendons 70 supporting the long width direction from the upper side thereof are arranged in a lattice form to form the concrete slab 90. Strengthen the strength and suppress the occurrence of cracks, a plurality of first reinforcing bar 60 and the second reinforcing bar 80 is disposed between the plurality of first tendons 50 and second tendons 70 in a lattice shape A sports equipment court with prestressing, characterized by uniformly distributing stress.
The method of claim 2,
The gravel layer 20 is constructed with a thickness of 20cm, the concrete slab 90 is constructed with a thickness of 10cm to improve the economics,
The first tendon 50 and the first reinforcing bar 60 is installed spaced apart from the PE sheet 30, the second tendon 70 and the second reinforcing bar 80 is the first tendon 50 and The first reinforcing bar (60) by forming a lattice in a lattice form by installing a pre-stressed sports coat, characterized in that to reinforce the strength of the concrete slab (90) to suppress the occurrence of cracks.
The method of claim 2,
The concrete slab 90 is to be installed in the formwork 40,
A tendon through-hole 41 is formed on the sidewall of the formwork 40, and a tensile work space 42 of tendon is further formed outside the formwork 40, and the first tendon 50 and the second tendon ( At least one end of 70) is drawn out through the tendon through-hole 41 and disposed in the tensioning work space 42 of the adjacent tendon so that the tensioning process by the hydraulic jack can be performed. Facility coat.

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