JP2007198052A - Basic heat insulating drainage structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a basic heat insulating drainage structure which uses the rock wool or the glass wool of a mat base that drains water in a short time even if covered with water by a typhoon, a flood or the like. <P>SOLUTION: A sheet for drainage formed of nonwoven fabric or the like which is continuous from the lower part of the rock wool or the glass wool brought into contact with the mat foundation part covered with water to a crushed stone side below a footing is laid and water soaked in the rock wool or the glass wool of the mat foundation part is made to escape to the crushed stone side below the footing by a capillary phenomenon, so that drainage is carried out in a short time. A similar effect is obtained by piling up soil below the rock wool or the glass wool even if the base does not have the footing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for dehydrating a heat insulating material that has been submerged by a typhoon or a flood after construction of basic heat insulation in a building.

  In recent years, a wooden house that lasts for 100 years has been preferred. However, when considering durability in a wooden house, it is important not to degrade the pillars and foundations that are structures. When submerged by a typhoon or flood after construction of basic heat insulation, even the heat insulating material is immersed, and if dehydration is slow, not only the deterioration but also the heat insulation performance may be impaired.

  As shown in FIG. 5, the conventional basic heat insulating structure is in contact with one or both sides of the beam portion (vertical) of the fabric foundation portion 2 and is fixed to the fabric foundation 2 with fasteners 4. The lower end of the heat insulating material 3 is in direct contact with the footing part 2a or has a structure that sandwiches crushed stone or soil. After construction of the basic heat insulation, normal rainwater does not soak water due to the water repellency of the heat insulating material 3, but in the case of a typhoon or water damage, there is a risk of flooding the construction part of the heat insulating material 3.

  As an example of the above, in a low-rise building for cold districts provided with a heat insulating material for keeping the underfloor space of the first floor on the fabric foundation on the outer periphery of the building, an air supply path for introducing outside air into the underfloor space is provided, and the foundation A technique for ventilating the entire under-floor space including the heat insulating material is known. (Patent Document 1)

In addition, horizontal insulation is provided in the foundation structure of a building where a horizontal heat insulating material extending outward in a substantially horizontal direction from the foundation is provided in the underground portion of the building to prevent the foundation from freezing. A technique is known in which a reinforcing layer made of a film, a sheet, or a lath is integrally formed on at least one of an upper surface and a lower surface of a material. (Patent Document 2)
Japanese Patent Laid-Open No. 10-325578 JP-A-11-36320

  In Patent Document 1, the inner end of the horizontal heat insulating material is brought into contact with the outer surface of the vertical heat insulating material with almost no gap, and the outer end extends outward from the footing portion. Although it is stated that the contact portion of the horizontal heat insulating material may be joined by fitting, there is no description about the water guiding method from the lower end of the vertical heat insulating material to the fitting portion of the horizontal heat insulating material in the fitting portion. There is no disclosure or suggestion about flooding countermeasures for vertical thermal insulation during typhoons or floods.

  Moreover, in patent document 2, although warm air is warmed using the warm air of the underfloor space by which foundation insulation was carried out, this warm air is transmitted also to a heat insulating material via a cloth foundation, There is no disclosure or suggestion about flooding countermeasures for vertical insulation during floods.

  This invention is made in view of the said problem, and is providing the method of draining in a short time, even if a heat insulating material absorbs water with the flooding of the vertical heat insulating material at the time of a typhoon or a flood.

  In order to solve the above-mentioned problems, in the present invention, in the basic heat insulating drainage structure of a building, the rock wool or glass wool used for the heat insulating material is provided with a drainage sheet having a wicking power stronger than the rock wool or glass wool. The water absorbed in contact with the lower end of the glass wool was drained in the fiber direction of the glass heat insulating material.

  In addition, an organic fiber cloth or nonwoven fabric is used for the drainage sheet. According to the above, even if the wooden house is flooded with rock wool or glass wool attached to the footing part due to typhoon or water damage, it can be drained in a short time.

  The foundation heat insulation drainage structure of the present invention can be constructed by either dry method or wet method, and even if there is no footing on the foundation, it can be handled by placing crushed stone or soil under rock wool or glass wool. It can be widely used as a flooding countermeasure for general wooden houses.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example in which a drainage sheet 5 is constructed on a fabric foundation 2 with a footing, FIG. 2 shows a drainage comparison between conventional construction and construction in which a polypropylene nonwoven fabric is laid under a heat insulating material 3, and FIG. FIG. 4 shows an example in which the drainage sheet 5 is constructed on the fabric foundation 2 having the discarded concrete 7 under the footing 2a.

  In FIG. 1, a base 1 is placed on a cloth foundation 2, and a heat insulating material 3 made of rock wool or glass wool is fixed to the cloth foundation 2 by a fixing fastener 4 on the outside. The drainage sheet 5 extends from the lower end of the heat insulating material 3 to the bottom of the footing 2a from the deck portion of the footing 2a. After construction of basic insulation, normal rainwater does not soak water into the insulation 3 due to the water repellency of the insulation board, but if it becomes submerged by a typhoon or flood, even the insulation 3 will be submerged and watered. May intrude. If there is no drainage sheet 5 even after a large amount of water is drawn, water remains in the heat insulating material 3, and in particular at the lower part of the heat insulating material 3, the soaked water does not escape for a long time due to the capillary action of glass fiber. .

  In the present invention, the shape of the drainage sheet 5 is such that it is kept horizontal from the lower end of the heat insulating material for a while, lowered vertically from there, vertically lowered for a while under the footing, and further bent in the horizontal direction.

  Therefore, when the drainage sheet 5 is constructed in the configuration of the present invention, water is guided to the lower part by gravity due to the capillary phenomenon of the drainage sheet 5 and the structure in which the drainage sheet is extended to the bottom of the footing and hung down. Therefore, the drainage time from the heat insulating material 3 is shortened.

  FIG. 2 is a comparison of drainage between the conventional construction and the construction in which a polypropylene nonwoven fabric (Typar SF 37) is laid under the heat insulating material 3. A test heat insulating material sample (200 mm × 200 mm × 50 mm) is immersed vertically and pulled up after 24 hours have elapsed, and then the drainage sheet 5 of FIG. 1 is placed first, and the test sample is heat-insulated thereon. The state of the drainage was confirmed by placing the test sample at the position of the material 3 and weighing the test sample after a predetermined time. At this time, a polyethylene sheet was attached to a portion where the test sample was in contact with the base so that the substrate did not absorb water, and a polypropylene nonwoven fabric (Typar SF 37) was used for the drainage sheet 5.

  In the figure, the difference between the conventional configuration and the configuration using the polypropylene nonwoven fabric appears from the time when 24 hours have passed after being pulled out of the water, and the configuration using the polypropylene nonwoven fabric is almost drained after 48 hours. On the other hand, in the conventional configuration, it can be seen that even when 96 hours have elapsed, it has reached only the 24-hour level of the configuration using the polypropylene nonwoven fabric.

  FIG. 3 is a construction example in the case where there is no footing in the fabric foundation 2. The soil corresponding to the footing of FIG. 1 is piled up, and the layout of the drainage sheet is kept horizontal for a while from the lower end of the heat insulating material as in FIG. It was set as the structure bent in a horizontal direction.

  FIG. 4 shows an example of construction when the discarded concrete 7 exists under the footing 2a. In this case, by draining the lower end portion of the drainage sheet 5 to the same position as the bottom surface of the discarded concrete 7 or lower than the bottom surface, the drainage can be prevented from staying in the discarded concrete 7 portion, so that the drainage efficiency becomes higher.

  Even if the building is flooded with typhoon or large water, spread the drainage sheet such as non-woven fabric continuously from the lower end of rock wool or glass wool that is in contact with the fabric foundation to the crushed stone under the footing, and the fabric foundation By escaping the water soaked in rock wool or glass wool to the crushed stone side under the footing by capillary action, drainage is possible in a short time, and the life of the building using wood is extended compared to the conventional method, It helps to protect forests on a global scale and enables environmental protection support from a long-term perspective.

Figure of drainage sheet laid to the bottom of the footing Graph of drainage comparison Figure of drainage sheet laid after embedding when there is no footing in the fabric foundation Laying diagram when there is abandoned concrete at the bottom of the footing Conventional example of cloth foundation

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Foundation, 2 ... Cloth foundation, 2a ... Footing, 3 ... Insulation, 4 ... Fixed fastener, 5 ... Drainage sheet, 6 ... Crushed stone, 6a ... Filling, 7 ... Discard concrete.

Claims (2)

In the basic heat insulating drainage structure of a building, the rock wool or glass wool used for the heat insulating material is brought into contact with the lower end of the rock wool or glass wool with a drainage sheet having a wicking power stronger than the rock wool or glass wool. The basic heat-insulating drainage structure is characterized by draining the water absorbed by water in the fiber direction of the rock wool or glass wool. 2. The basic heat insulating drainage structure according to claim 1, wherein an organic fiber cloth or non-woven fabric is used for the drainage sheet.