JPH0247142Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a prefabricated basement constructed by connecting box-shaped culverts made of concrete.

[Conventional technology]

Due to soaring land prices, changes in lifestyles, and even in preparation for disasters, basements are becoming more and more common in ordinary homes in Japan.
As in the invention disclosed in Publication No. 57-110151, the part that will become the foundation of a building is excavated to a certain depth, and a plurality of basement members having a seam part in a substantially vertical direction are inserted into the excavated hole. A structure constructed by piecing together precast concrete blocks has been proposed.

However, this structure is expensive because it uses special precast concrete blocks for constructing basements, and the structural strength is weak because the connecting means between each block is simply a joint. There are various problems such as difficulty in ensuring safety against earthquakes and uneven ground subsidence. In particular, in the case of this type of basement, on which a structure is often constructed, greater structural strength is required than that of the structure built above it.

Therefore, as in the invention disclosed in Japanese Patent Application Laid-Open No. 59-8837, a hollow body in which a floor slab, a wall, and a roof slab are integrally formed, and a hollow body is provided in various places of the floor slab, walls, and roof slab. A unit in which a sheathed pipe is buried horizontally and the end of the sheathed pipe is opened on the outer surface of a floor slab, wall, or roof slab is molded with concrete, and multiple units are installed in parallel. There is a unit type underground building that is characterized by

[Problem that the invention attempts to solve]

Although this invention has the effect that the connection between each unit is stronger than that of the device disclosed in the above-mentioned Japanese Utility Model Publication No. 57-110151, the sheath pipe is buried in the floor slab, wall, and roof. Since there are many parts in various parts of the slab, there is a problem that the structural strength of the unit itself will be weakened unless the wall thickness of the unit is considerably increased.

Furthermore, since each unit uses a special precast concrete block for constructing a basement, the problem of high cost cannot be solved, as in the above invention.

[Means to solve the problem]

In view of the above-mentioned conventional problems, the purpose of this invention is to provide a unit that can be constructed at low cost, has high structural strength at the connecting part, and does not deteriorate the structural strength of the unit itself. The gist is that a plurality of concrete box-shaped underdrains each having a through hole for connection at each of the four corners are arranged in succession with a sealing member in between, and through holes that communicate the openings at both ends with the through holes are provided. The end plates and each of the box-shaped underdrains are connected together by tensioning the tensioned steel members inserted into the through holes, and the walls of some of the box-shaped underdrains are It is a prefabricated basement characterized by having a light or a hole for access.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

The figure shows an example suitable for a semi-underground basement with the ceiling and walls exposed above ground. 1, 1... is a box-shaped frame with openings in the front and rear directions, and is manufactured in a factory as a standard product for culverts, for example. Furthermore, it is a so-called box-shaped underdrain made of concrete, and through-holes 1a are formed in the four corners of the culvert to pass through from front to back.

2 and 3 are some of the box-shaped culverts 1, 1..., for example, in the drawing, they are rectangular holes of the same size formed in the ceiling walls of the box-shaped culverts arranged at the front and rear ends, and are used for lighting or entrances. In the former hole 2 for lighting, a transparent plate 6 such as a glass or synthetic resin plate can be attached directly with adhesive without a frame, or it can be attached by fitting it into the hole 2 using a frame. In the latter entrance/exit hole 3, a staircase 5 integrally formed of concrete, steel plate, synthetic resin, etc. is provided, the upper end of which is attached to the edge of the hole 3, and the lower edge is attached to the inside of the bottom wall. Each is fixed.

Reference numeral 6 denotes an end plate having an inner flange and a rectangular shape in front view, which has the same size as the outer shape of the opening end surface of the box-shaped culvert 1, and has the same shape as the above-mentioned end plate formed at the four corners of each box-shaped culvert 1 at its four corners. Through hole 6a communicating with through hole 1a
is formed, and an enlarged portion 6b is formed at the open end of the through hole 6a.

Reference numeral 7 denotes a tensioning PC steel rod, which has a length corresponding to the length of the basement to be constructed, and has a large diameter portion 7a formed at one end. In the figure, 1b and 1c are circumferential grooves formed on one end surface of the opening of the box-shaped underdrain 1, p and m are sealing members that also serve as cushioning materials, and the sealing member p is in the circumferential groove 1b, and the sealing member m is in the circumferential groove 1b. are fitted into the circumferential grooves 1c, respectively.

When constructing a basement by assembling each member consisting of the above-mentioned structure, first excavate the planned location, lay chestnut stone S at the bottom of the excavated hole, and pour foundation concrete C on top of this to form the foundation. Build.

Next, on top of this foundation, multiple box-shaped culverts 1, 1
are arranged in series while abutting against the open end surfaces thereof, and end plates 6, 6 are disposed at the openings of the box-shaped underdrains 1 located at both left and right ends, respectively.

Then, insert the PC steel rod 7 into the through hole 1a of each box-shaped underdrain 1 and the through hole 6a of the end plate 6 from the other end of the large diameter part 7a, and insert the PC steel rod 7 into the exposed tip through the through holes 1a and 6a. Fit the washer 8 and receiver ring 9 shown in Figs. 1 and 5, and drive the wedge 10 between the receiver ring 9 and the PC steel bar 7 while tensioning the end (left end in Fig. 1) with a jack or the like. , each box-shaped culvert 1, 1 and end plate 6, 6
are brought into close contact with each other via seal members p and m, and are connected and fixed together.

After that, if the transparent plate 4 has not been installed beforehand, attach it to the hole 2, attach the stairs 5 and door to the hole 3, and perform piping, wiring, etc., and the basement will be completed. In the illustrated example, as shown in Figure 3, after backfilling with soil, the foundation D of the house to be built on it is constructed so as to be on top of the box-shaped culverts 1, 1, and the house is fixed and To support.

[Effect of idea]

As mentioned above, the prefabricated basement according to the present invention has the following features:
A plurality of concrete box-shaped underdrains having through holes for connection at each of the four corners are arranged in succession with a sealing member in between, and each end has an opening at each end having a through hole that communicates with the through hole. The end plate and each of the box-shaped culverts are closed with a plate, and the end plate and each of the box-shaped culverts are connected together by tensioning the tensioned steel members inserted into the through holes, and the walls of some of the box-shaped culverts are illuminated. Alternatively, since it has a structure in which a hole is formed for entry and exit, an existing box-shaped underdrain can be used as is or with some modification, and costs can be reduced.

Moreover, since each member is integrally connected by tightening tension steel materials, the structural strength of the connection part is high, and the resistance to external forces such as earthquakes and uneven settlement is high. By forming the through holes for insertion at the four largest corners of the thick part, the structural strength of the box-shaped underdrain is not deteriorated, so durability is improved.

In addition, since the vertical supporting capacity is large, it is possible to construct a house or the like above the basement of the present invention, and there are various effects such as being able to aim for effective use of land.

[Brief explanation of drawings]

Figure 1 is a partially exploded perspective view of the prefabricated basement according to the present project, Figure 2 is a vertical cross-sectional view of the upper half of the assembled basement, and Figure 3 is a cross-sectional view taken along the line A-A in Figure 2. , Figure 4 is an enlarged view of part B in Figure 2, and Figure 5 is an enlarged view of part C in Figure 2.
FIG. 1... Concrete box type culvert, 1a... Through hole, 2, 3... Hole, 6... End plate, 6a... Through hole, 7... PC steel bar, p, m... Seal member .

Claims (1)

[Scope of utility model registration request] A plurality of concrete box-shaped underdrains having through holes for connection at each of the four corners are arranged in succession with a sealing member in between, and each end has an opening at each end having a through hole that communicates with the through hole. The end plate and each box-shaped underdrain are closed by a plate, and tensioned steel members inserted into the through holes are connected together by tension.
A prefabricated basement characterized in that some of the walls of the box-shaped culvert are provided with a light or entry/exit holes.