JP3114141B2 - Basement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basement whose side wall is formed by a small-sized precast concrete member.

[0002]

2. Description of the Related Art Recently, demand for basements has been increasing in general houses due to soaring land prices and noise.

[0003] Conventionally, basements have been constructed of cast-in-place concrete. However, in the case of constructing a basement made of cast-in-place concrete, there is a problem that highly skilled workers such as formwork and reinforcing bars are required. In addition, when the entire structure including the side wall on which a large earth pressure acts is constructed of cast-in-place concrete, quality control is difficult and the construction period is long.

In order to solve such problems, recently,
A construction method has been proposed in which a side wall of a basement is constructed using a small-sized precast concrete member having an L-shaped vertical cross section.

[0005] A basement using this precast concrete member is a precast concrete member having an L-shaped longitudinal section in which a vertical wall component and a horizontal base component are integrated into an excavated underground space. Adjacent to each other are installed to form a side wall of the basement, and a base made of cast-in-place concrete is built at the bottom of the internal space of the basement in a form that is continuous with the base structure of each precast concrete member. , And each precast
On the top surface of the wall component of the concrete member, a screw portion of an anchor bolt having an anchor buried in the wall component protrudes.

[0006]

In the basement having such a structure, the side wall on which a large earth pressure acts is constructed by a plurality of precast concrete members constructed under a sufficient quality control in a factory. There is an advantage that it is possible to construct a basement side wall having sufficient mechanical strength even without a skilled worker.

[0007] It is an object of the present invention to provide a basement provided with anchor bolts that can sufficiently bear the stress from the above-ground building, and to improve the mechanical strength of the ceiling of the basement.
It is an object of the present invention to provide a basement with a high ceiling by strengthening integration with a building above the ground.

[0008]

SUMMARY OF THE INVENTION In order to solve the conventional problems as described above and achieve the intended purpose, the features of the present invention are as follows.
In an excavated underground space, a precast concrete member having an L-shaped vertical cross-section, in which a vertical wall component and a horizontal base component are integrated, is installed by adjoining each other between adjacent basements. Side walls are formed, and in the basement, a base made of cast-in-place concrete is continuously formed at the bottom of the inner space of the basement in the basement constituting part of each of the precast concrete members. Between the tops of the steel beams and embed the upper part of the steel frame
The be integrated with the top of the precast concrete parts, the cast-in-place reinforced concrete ceiling slab is provided, said wall component top of the precast concrete parts
On the surface, an anchor in which an anchor portion is embedded in the wall constituting portion
-The screw portion of the anchor bolt is projected and the screw of the anchor bolt is
A retaining member is attached to the part,
・ Along the top surface of each wall component of the concrete member
Therefore, the spiral streaks are placed in the annular space by the anchor bolts.
It is set up so that each of the retaining members of the
Placed in the spiral muscle from within the spiral muscle
Anchor bolts for fastening ground buildings with anchors positioned
Are installed at predetermined intervals, and the ceiling of the internal space of the basement is
The whole of the spiral streaks and the ground building fastening
The lower part of the anchor bolt is buried in the
A reinforced concrete ceiling slab is provided.
The U-shaped rebar folded in a U-shape is
Straddling the spiral streaks at the parallel portions at both ends of the reinforcing bar,
The part is buried in an arrangement in which the tip of the part overlaps the slab streaks .

[0009] With such a configuration, each precast concrete member has a reinforced concrete ceiling slab in which the upper end is integrated by a concrete ceiling slab, the connection between them is strengthened, and the steel slab is reinforced with a steel beam. In addition, since it is integrated with the side wall, a high-strength basement can be obtained.

[0010]In addition, anchor bolts for fastening each ground building
Is buried in a cast-in-place reinforced concrete ceiling slab
Anchors are provided in the spiral muscles
Integrated with the cast-in-place reinforced concrete ceiling slab
Because, the mechanical strength is much higher than before,
It can sufficiently bear the stress from the building above the ground.

Further, if a cast-in-place reinforced concrete ceiling slab is provided on the ceiling of the inner space of the basement so as to bury the entire spiral streaks and the lower half of each ground building anchor bolt, each precast concrete The large earth pressure acting on the member is also borne by the cast-in-place reinforced concrete ceiling slab, so that a basement having sufficient mechanical strength against the earth pressure on the upper side wall of the basement can be obtained.

[0012]

1 to 12 show one embodiment of a basement according to the present invention.

In this embodiment, when constructing a basement, a precast concrete member 1 shown in FIGS. 1 and 2A and 2B is used as in the prior art. This precast
Concrete member (hereinafter referred to as PCa member) 1
The vertical wall component 2 and the horizontal bottom component 3 are integrated to form an L-shaped vertical cross section. This PC
On both sides of the inner surface of the a member 1 in the width direction, connecting fittings 4 are fixed. As shown in FIG. 3, the connection fitting 4 is formed of a U-shaped steel plate having bolt holes, and is embedded and fixed in the PCa member 1 together with the anchor rebar 5 welded thereto. Further, a bolt box 6 for mounting a bolt to the connection fitting 4 is formed. In addition, a deep groove 7 for filling a sealing material is formed in the joining side surface of the PCa member 1 in parallel with the wall constituting portion 2 or the bottom plate constituting portion 3 as shown in FIG. I have. The inlet 7i of the deep groove 7 is provided so as to open on the top surface of the wall component 2, and the air vent 7o is provided so as to open on the upper surface of the bottom component 3. Furthermore, P
On the joint side surface of the Ca member 1, a 1
As shown in FIGS. 4 and 5, a pair of shallow grooves 8 are formed on both sides of the deep groove 7 so as to be continuous with the deep groove 7.

In order to construct a basement using the PCa member 1 constructed as described above, as shown in FIG. The necessary type and number of PCa members 1 are carried in and installed, and a basement is constructed, for example, as shown in FIG.

Then, cast-in-place concrete 12 is poured into the bottom of the inner space 11 of the basement, and
It is constructed so as to be integrated with the underground side wall made of the Ca member 1.

When the PCa member 1 is loaded and installed, each PCa member 1 is small (for example, 910 mm in width and 281 in height).
(0 mm), so that it is easy to work even in a general house with a narrow site and surrounding roads.

To install the PCa member 1, first, a rubber-like elastic material 14 such as natural rubber or synthetic rubber is inserted into a pair of front and rear gaps formed between the shallow grooves 8 on the joining surface of the adjacent PCa member 1.
Are mounted, and each PCa member 1 is disposed on the concrete 10 in such a manner that the rubber-like elastic material 14 is sandwiched between the adjacent PCa members 1 and compressed.

Then, as shown in FIG.
The members a are joined to each other, and the connecting metal fittings 4 on the joining end faces are fastened with high tension bolts 15 to be integrated.

Next, in the hole 16 formed by the deep groove 7 of the joining end face of the adjacent PCa member 1 facing each other,
A sealing material 17 such as a two-component reaction-curing soft epoxy resin is injected or filled. When injecting the sealing material 17,
Inject from the inlet 7i on the upper end face and the air vent 7o below.
By discharging the air in the hole 16 between the deep grooves 7 from the
The sealing material 17 can be filled densely. When the sealing material 17 is filled in the hole 16 between the deep grooves 7, the effect of the backup material of the rubber-like elastic material 14 in the gap between the shallow grooves 8 is as follows.
It is possible to prevent the sealing material 17 from leaking from the hole 16 between the deep grooves 7, and to stop the water in three stages in the order of the rubber-like elastic material 14, the sealing material 17, and the rubber-like elastic material 14 where there is groundwater. Can be.

Internal space 1 of underground side wall by PCa member 1
In order to construct the bottom 13 of the PCa, first, a reinforcing bar 18 is connected to the bottom constituting part 3 of the PCa member 1 in a connected form. Then, the cast-in-place concrete 12 is cast, and the bottom component 3 of each PCa member 1 and the cast-in-place concrete 12 are integrated.
Build the bottom plate 13.

Therefore, since the joint between the underground side wall and the bottom plate 13 where the stress is the largest is constructed by the PCa member 1 manufactured at the factory, the construction period can be shortened and the structural reliability can be increased. . That is, sufficient strength can be secured at the joint between the underground side wall and the bottom plate 13, and water can be reliably stopped.

As shown in FIG. 6, a drain groove 22 is provided in the bottom plate 13 and an inner wall 19 made of a waterproof gypsum board, rock wool or the like is provided. Then, since the space 21 is formed between the wall constituting portion 2 of the PCa member 1 and the inner wall 19, dew condensation on the inner wall 19 is prevented. In addition, even if dew condensation occurs on the wall component 2, it can be drained through the drain groove 22.

As shown in FIGS. 9 and 10, anchor portions 23a of anchor bolts 23 are respectively buried in the wall constituting portion 2 of each PCa member 1 in the same manner as in the prior art. The projections are respectively provided on the top surface of the wall component 2. In this example, the retaining members 24 are respectively attached to the screw portions 23b of the anchor bolts 23 by using double nuts and washers.

In such a state, a spiral streak 25 is provided on the upper surface of the wall constituting portion 2 of each PCa member 1 along these lines, as shown in FIGS. It is installed so that the retaining members 24 are present. In addition, from the inside of the spiral streak 25, anchor bolts 26 for fastening a building above the ground where the anchor portions 26a are positioned by welding or the like are erected at predetermined intervals in the spiral streak 25.

A metal receiving member 27 is provided in advance at an inner corner of the upper surface of the wall constituting portion 2 of each PCa member 1.
An F-deck receiving member 28 is arranged along these receiving members 27, and the flat deck receiving member 28 is fixed to each receiving member 27 by welding.

Internal space 1 of underground side wall by PCa member 1
A flat deck plate 29 is laid over the flat deck receiving member 28 so as to straddle the flat deck receiving hardware 28 facing the flat deck receiving member 28. Further, a steel beam 30 is stretched at predetermined intervals between the tops of the opposing PCa members 1.

On the flat deck plate 29, FIG.
1, Haisuji Then together the slab muscle 31 as shown in FIG. 12
U-shaped rebar 35 with a U-shape folded into a pipe
The upper part of the steel beam 30 and the entire spiral streaks 25
And a cast-in-place reinforced concrete ceiling slab 32 is laid so as to bury the lower half of each ground building anchor bolt 26. Cast-in-place steel bar conc formed by this
In the REIT ceiling slab 32, flat ends at both ends of the U-shaped
In the row portions 35a, 35b, the spiral streaks 25 are straddled.
An arrangement in which the tips of the parallel portions 35a and 35b are overlapped on the slab streaks 31
At the same time, the screw portions 26 b of the anchor bolts 26 for fastening the above-ground buildings protrude from above the ceiling slab 32.
Set up.

These anchor bolts 26 for fastening the above-ground buildings
The base 33 made of wood on the first floor of the above-ground building is fastened to the screw portion 26b by a nut 34.

With such a structure, the anchor bolts 26 for fastening the above-ground buildings are connected to the spiral reinforcement 2 embedded in the cast-in-place reinforced concrete ceiling slab 32.
5, since the anchor portions 26a are respectively provided and integrated with the cast-in-place reinforced concrete ceiling slab 32, the mechanical strength is much improved as compared with the related art, and the stress from the ground building is sufficiently borne. Can be.

In addition, a cast-in-place reinforced concrete ceiling slab 32 is provided on the ceiling of the internal space 11 of the basement so as to bury the entire spiral streak 25 and the lower half of the anchor bolt 26 for fastening each above-ground building. The large earth pressure acting on each PCa member 1 is also borne by the cast-in-place reinforced concrete ceiling slab 32, so that it has sufficient mechanical strength against the earth pressure at the upper part of the side wall of the basement and has a high ceiling height. You can get a basement.

Since the cast-in-place reinforced concrete ceiling slab 32 is reinforced by the steel beam 30 bridged between the opposing tops of the PCa members 1, the mechanical strength of the cast-in-place reinforced concrete ceiling slab 32 is further improved. Can be done.

It is to be noted that an H-shaped steel or the like can be used instead of the flat deck receiving hardware 28.

[0033]

In the basement according to the present invention, the excavated
Underground space, vertical wall component and horizontal base component
Is an L-shaped pre-cast
Concrete members are installed with adjacent
And the side wall of the basement is constructed.
The bottom plate made of cast-in-place concrete is placed at the bottom
It is connected to the bottom
In the basement that is being constructed,
Steel beams between the tops of the precast concrete members
Embed the upper part of the steel frame and
Integrated with the top of the cast concrete member,
A reinforced concrete ceiling slab is provided and
On the top surface of the wall component of the recast concrete member,
Anchor bolts with anchors embedded in the wall component
And the anchor bolt has a screw
The members are attached, and each of the precast concrete
The upper surface of each wall forming portion of the preparative member along these spiral
When the anchor bolts are
It is installed so that each stop member is present, and
From inside the spiral muscle, insert the anchor part into the spiral muscle.
Predetermined spacing of the anchor bolts for fastening the above-ground buildings
And the ceiling of the inner space of the basement has the spa
Anchor bolts for fastening all of the above-mentioned building and the whole of the iral bar
Bury the lower half of the
A REIT ceiling slab is provided, and a U-shaped
The U-shaped rebar folded in a shape is connected to both ends of the U-shaped rebar.
Straddle the spiral muscle with the parallel part, and slide the tip of the parallel part
By being buried in an arrangement that overlaps the lab muscle, the entire basement becomes an integrated box shape and the overall mechanical strength increases, making it impossible to respond with the conventional ceiling slab framework method, A basement that can respond to design and has greatly improved design response can be obtained.

In the basement according to the present invention, each anchor bolt for fastening a building above the ground is provided with an anchor portion in a spiral bar buried in a cast-in-place reinforced concrete ceiling slab. Since they are integrated, the mechanical strength is much improved as compared with the related art, and the stress from the building above the ground can be sufficiently borne. On the ceiling of the basement interior space, cast-in-place reinforced concrete ceiling slabs are provided so that the entire spiral streaks and the lower half of each ground building anchor bolt are buried.
The large earth pressure acting on the concrete members will also be borne by the cast-in-place reinforced concrete ceiling slab,
It is possible to obtain a basement having sufficient mechanical strength against the earth pressure at the upper part of the side wall of the basement and having a high ceiling height.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an example of an embodiment in a basement according to the present invention.

FIGS. 2A and 2B are a front view and a side view of a precast concrete member used in this example.

FIG. 3 is an enlarged front view of a connecting metal part in FIG. 2;

FIG. 4 is an enlarged plan view of a groove portion shown in FIG. 2 (B).

FIG. 5 is an enlarged side view of a groove portion shown in FIG. 2 (B).

FIG. 6 is a vertical sectional view showing an inner wall constructed inside a basement by a precast concrete member.

FIG. 7 is a horizontal sectional view showing a state in which an elastic material and a sealing material are attached to a joint end surface of a precast concrete member.

FIG. 8 is a vertical sectional view showing a method of joining precast concrete members.

FIG. 9 is a perspective view showing an example of a state in which a spiral streak, an anchor bolt for fastening a building above the ground, and a flat deck plate are provided above a precast concrete member according to the present invention.

FIG. 10 is a vertical sectional view showing an example of a state in which a spiral streak, an anchor bolt for fastening a building above the ground, and a flat deck plate are provided above a precast concrete member according to the present invention.

FIG. 11 is a perspective view showing an example of a state in which slab streaks are arranged on a flat deck plate in the present invention.

FIG. 12 is a vertical view showing an example of a state in which a cast-in-place reinforced concrete ceiling slab is provided on the ceiling of the inner space of the basement according to the present invention so as to bury the entire spiral streak and the lower half of the anchor bolt for fastening each above-ground building. It is sectional drawing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Precast concrete member (PCa member) 2 Wall constituent part 3 Bottom part constituent part 4 Connection metal fittings 5 Anchor reinforcement 6 Bolt box 7 Deep groove 7i Inlet 7o Air vent 8 Shallow groove 9 Split chestnut ground 10 Discarded concrete 11 Internal space 12 Site Casting concrete 13 Bottom board 14 Rubbery elastic material 15 High tension bolt 16 Hole 17 Sealing material 18 Arrangement 19 Inner wall 21 Space 22 Drainage groove 23 Anchor bolt 23a Anchor part 23b Screw part 24 Detachment member 25 Spiral streak 26 Anchor for ground building fastening Bolt 26a Anchor part 26b Screw part 27 Bracket 28 Flat deck bracket 29 Flat deck plate 30 Steel beam 31 Slab bar 32 Cast-in-place reinforced concrete ceiling slab

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takao Iwasaki 5-33-11 Shimbashi, Minato-ku, Tokyo Inside Japan Hume Pipe Co., Ltd. (72) Inventor Satoshi Minamizawa 5-33 Shimbashi, Minato-ku, Tokyo No. 11 Inside Japan Hume Tube Co., Ltd. (56) References JP-A-8-260488 (JP, A) JP-A-9-67939 (JP, A) JP-A 8-239848 (JP, A) 7-44103 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 29/00

Claims (1)

(57) [Claims] An excavated underground space has a vertical cross-sectional shape in which a vertical wall component and a horizontal bottom component are integrated.
The precast concrete members in the shape of a letter are installed by adjoining each other adjacent to each other to form the side wall of the basement,
In the basement, a base made of cast-in-place concrete is continuously formed on the bottom part of each precast concrete member at the bottom of the inner space of the basement, and a steel frame is provided between the tops of the opposing precast concrete members on the side wall. Hang the beam and fill the upper part of the steel frame
And wherein is integrated with the top of the precast concrete parts with writing, cast-in-place reinforced concrete ceiling slab is provided, wherein each precast concrete parts
An anchor portion is embedded in the wall component on the top surface of the wall component.
The threaded portion of the anchor bolt that is
A retaining member is attached to the screw part of the
On the upper surface of each wall component of the recast concrete member
A spiral streak runs along each of these in its annular space.
Each of the retaining members for anchor bolts
From the inside of the spiral muscle.
An anchor for ground building fastening with an anchor portion positioned in the
Anchor bolts are erected at predetermined intervals, and inside the basement.
On the ceiling of the space, the entire spiral streaks and
Bury the lower half of the anchor bolt
The cast-in-place reinforced concrete ceiling slab is provided,
Inside the ceiling slab is a U-shaped rebar folded in a U-shape
The spiral bar at the parallel portions at both ends of the U-shaped reinforcing bar.
Straddle and buried in a position where the tip of the parallel portion overlaps the slab streak.
A basement that is characterized by being