JPH04117040U - Building foundation structure - Google Patents

Abstract

(57) [Summary] [Purpose] The foundation structure of the building of the present invention greatly eliminates the labor involved in assembling the foundation, shortens the construction period, and can be assembled on soft ground with insufficient soil bearing capacity. The purpose is to provide a foundation that will not cause subsidence even if [Structure] The basic structure of the present invention includes underground beams installed in a grid pattern over the entire bottom of the building, and a floor slab 2 installed surrounded by the underground beams. In the foundation structure of a building where the entire middle beam and floor slab 2 receive a ground reaction force against the weight of the building, a block body 3 formed of expandable polystyrene is provided between the floor slab 2 and the ground 4. is laid over the entire area surrounded by underground beams.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the foundation structure of a building, and in particular, the present invention is aimed at covering almost the entire base area of the building. Concerning solid foundation structures that receive ground reaction forces against weight.

0002

[Conventional technology]

As the foundation of the building, underground beams are installed in a grid pattern along the entire bottom of the building. A floor slab is provided surrounded by the underground beams, and the whole structure is constructed using the underground beams and the floor slab. There is a solid foundation that receives the ground reaction force against the weight of the building.

0003 This is used for foundations where the area subject to ground reaction force is large and the ground has insufficient bearing capacity. It is effective as Also, compared to independent foundations and cloth foundations, cutting the roots is shallower. This eliminates the hassle of cutting roots and disposing of leftover soil, thereby shortening the construction period. It is also advantageous.

0004 By the way, with a solid foundation, a certain height must be maintained between the ground and the floor of the building. In conventional solid foundations, embankment 5 is placed under floor slab 2 as shown in Figure 3. This has been dealt with by increasing the thickness of the floor slab 2 as shown in Fig. 4.

[0005]

[Problem that the idea aims to solve]

However, the conventional solid foundation described above has the following problems. In other words, when building an embankment under a floor slab, it is important to secure the earth and sand used for the embankment, and to Hands were used to compact the embankment in order to make the soil strong enough to serve as the foundation for a building. It took a while. Also, if the floor slab is made thicker, the amount of concrete used This increases the weight of the foundation itself, and the bearing capacity of the ground becomes insufficient, causing uneven settlement. There were some drawbacks.

[0006] This invention was made in view of the above-mentioned conventional problems, and the above-mentioned operational problems. To provide a foundation that is not affected by soft ground with insufficient bearing capacity and eliminates the hassle of The purpose is to

[0007]

[Means to solve the problem]

The present invention achieves the above purpose by incorporating a grid-like structure over the entire bottom of the building. It includes an underground beam and a floor slab provided surrounded by the underground beam, and the underground beam and the floor slab are connected to each other. In the foundation structure of a building, which receives ground reaction force against the weight of the building, A block made of foamed polystyrene is placed between the marking slab and the ground. It is characterized by being laid over the entire area surrounded by underground beams.

[0008] In addition, the idea in Section 2 is that the block body is laid on the ground without any root cutting. It is characterized by

[0009] In addition, the invention in Section 3 is based on the fact that the total thickness of the floor slab and the block body is 40 cm. It is characterized by the above.

0010 In addition, the fourth idea is that the block has a standardized rectangular shape and is surrounded by underground beams. In addition to laying a plurality of the above-mentioned blocks in a lined up area, the shape of the above-mentioned blocks is It is specified that blocks cut into the shape of the area were laid in areas that did not conform to the be a sign.

[0011]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the structure of a foundation according to an embodiment of the present invention. Also, Figure 2 It is a plan view of the same foundation.

0012 As shown in the figure, the solid foundation of this example is an underground beam unit formed by assembling underground beams vertically and horizontally. knit 1, a floor slab 2 provided surrounded by the underground beam unit 1, and a floor slab 2 and a block body 3 interposed between the base and the ground 4.

[0013] The above-mentioned underground beam unit 1 and floor slab 2 are composed of an underground beam reinforcement 1a and an underground beam reinforcement 1a. A group of welded reinforcing bars consisting of anchored reinforcing bars 1b and slab reinforcing bars 2a that connect the It is formed by pouring reeds into one piece. Welded as underground beam reinforcement 1a and slab reinforcement 2a By using reinforcing bars, it is easy to unitize and save labor. I can do it.

The block body 3 is made of foamable polystyrene (so-called styrene foam). The block body 3 has a compressive strength of about 1 to 3 kgf/cm ³ which is sufficient to support a building. Furthermore, it is extremely lightweight because it has a density of 0.012 to 0.030 t/m ³ , which is about 1/100 of normal earth and sand. Therefore, when the block body 3 is used as a substitute for embankment, it has sufficient strength and does not cause subsidence even on soft ground.

[0015] Furthermore, the block body 3 has excellent water resistance, heat resistance, and self-reliance, and is self-extinguishing even if ignited. Because it has a property that is resistant to changes in the external environment such as Suitable for use as a substitute.

[0016] The block body 3 used in this example has a standardized rectangular shape. It can be easily cut and processed to match the shape of the bottom surface. Also, 20-3 It has a thickness of about 0 cm, and the height from the ground is about 40 cm with this and the thickness of the floor slab. We ensure that In addition, as the block body 3, a thinner one than that in this example is used, A similar height may be secured by stacking a plurality of layers.

[0017] In addition, the block body 3 is the entire area surrounded by the underground beam unit 1 as shown in Fig. 2. It is laid out without any gaps. This allows the underground beam unit 1 and floor slab 2 to be shaped. When pouring concrete to form the structure, the sides of the block body 3 play the role of formwork, There is no need to provide formwork inside the underground beam unit 1. Here, as mentioned above , the block body 3 has extremely good self-reliance, and can be used as an underground beam unit even under the weight of the building. Since no large lateral pressure is applied to block 1, the floor is placed on top of block 3 as shown in Figure 1. By placing slab 2, it will not affect the ground 4 or underground beam unit 1. The upper surface of the foundation can be maintained at a predetermined height from the ground 4. In addition, each block body 3 is easily positioned and fixed using a metal claw or the like. be able to.

[0018] Next, the foundation construction procedure of this example will be explained. First, the ground where the foundation will be installed is shallowly cut at the location where the underground beam unit 1 will be placed. Lay a crusher over the entire ground and compact it. Then, a moisture-proof and anti-termite sheet is placed on the surface. It's crowded. The crusher used here is gravel used for road construction, etc. , which is smaller than normal split chestnut stone. In addition, such land works are limited to the construction methods mentioned above. It is also possible to use conventional construction methods.

[0019] Next, formwork is installed at the outer periphery of the foundation on the ground that has been cleared. Main implementation This is the only formwork used in the example. Then, a unit consisting of underground beam reinforcement 1a and fixed reinforcing reinforcement 1b is installed at the predetermined location where the roots have been cut down. A block body 3 is placed in the area surrounded by the block body 3 without any gaps. At this time , a plurality of rectangular block bodies 3 are laid side by side, and the circumference that does not match the shape of the block body 3 is For the sides etc., cut the block body 3 to fit the shape of that part and lay it down. That will happen. Next, the unit of the underground beam reinforcement 1a and the anchoring reinforcement 1b and the block body 3 are A unit of slab reinforcement 2a is installed on top.

[0020] After this, anchor bolts etc. will be installed and concrete will be poured. At this time, The side surface of the lock body 3 serves as the formwork inside the underground beam unit 1.

[0021]

[Effect of the idea]

As explained above, the foundation structure of the present invention is designed to connect the floor slab and the ground in a solid foundation. By interposing a block made of styrofoam between the foundations, It is possible to significantly reduce the labor required for assembly work and shorten the construction period. Furthermore, the foundation according to the present invention can be constructed to be extremely lightweight and has sufficient soil bearing capacity. Even when assembled on soft ground, there will be no subsidence or other effects. The effect is that there is no problem. In addition, by laying the blocks over the entire area surrounded by underground beams, the cost is reduced. The number of formwork used when pouring concrete can be significantly reduced, reducing the amount of work required. It is effective in shortening the construction period. The idea in Section 2 does not involve cutting down the roots of the ground where the blocks are to be laid. This is even more effective in reducing the labor involved in assembling the foundation and shortening the construction period. The invention in Section 3 requires that the total thickness of the floor slab and the block body be 40 cm or more. This makes it possible to secure a sufficient height from the ground to the building floor. Ru. The idea in Section 4 is that the block shape is basically a standardized rectangular shape. It is even more effective by reducing work effort and shortening the construction period.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of a foundation according to an embodiment of the present invention.

FIG. 2 is a plan view of the foundation of FIG. 1;

FIG. 3 is a sectional view showing the structure of a conventional solid foundation.

FIG. 4 is a sectional view showing the structure of a conventional solid foundation.

[Explanation of symbols]

1 Underground beam unit 1a Underground beam 1b Anchored reinforcing bar 2 Floor slab 2a Slab muscle 3 block letters 4 Ground

Claims (3)

[Scope of utility model registration request] Claim 1: A building comprising underground beams installed in a grid pattern over the entire bottom surface of a building, and a floor slab provided surrounded by the underground beams, the underground beams and the entire floor slab. In the foundation structure of a building that receives ground reaction force against the weight of the building, blocks made of foamed polystyrene are placed between the floor slab and the ground over the entire area surrounded by underground beams. The basic structure of a building, which is characterized by being laid down. 2. The foundation structure of a building according to claim 1, wherein the block body is laid on the ground without any root cutting. Claim 3: Claim 1, characterized in that the total thickness of the floor slab and the block body is 40 cm or more.
The basic structure of the building described in section. [Claim 4] A plurality of the above block bodies are laid side by side in an area where the block bodies have a standardized rectangular shape and are surrounded by underground beams, and in addition to laying a plurality of the above block bodies side by side in an area where the block body has a standardized rectangular shape, The foundation structure of a building according to claim 1, characterized in that a block body cut into the shape of is laid.