JPH11158890A - Method for building house basement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for constructing a basement for a private house capable of constructing a basement in a small site by constructing a continuous wall without moving the present soil at a lower cost, and shortening the period of construction work. SOLUTION: A vertical groove for constructing a continuous wall over the required range on soil to construct a basement is dug to a predetermined depth is filled with a stabilizer for stabilization of the continuous wall, and after the digging is completed, a reinforcing cape 12 is inserted into the vertical groove. Next, concrete is placed from the bottom of the groove while substituting it for the stabilizer, to construct the continuous wall made of reinforced concrete in the ground. The soil surrounded by the continuous wall is dug to a predetermined depth, and concrete for a basement floor slab is placed and connected to the continuous wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a basement for a residence which is built at a relatively shallow depth, and more particularly to a method for constructing a basement for a private residence which is built on a small site of about 50 tsubo. It relates to a preferred method.

[0002]

2. Description of the Related Art As a conventional method of constructing a basement for a general private residence, a sheet pile for earth retaining is punched as a temporary work, and the soil in the sheet pile is excavated and then placed in a predetermined position. There is a method in which concrete is poured by assembling steel bars and concrete forms, and the surplus parts are backfilled.

However, in this method, loud noises and vibrations are generated when a sheet pile is struck to prevent the adjacent ground from collapsing, causing inconvenience to nearby residents, and a large cost for temporary work such as a formwork. Will be high. Also, the construction period is long. Further, there is a problem that it is difficult to cope with a small site due to the necessity of extra digging, so that it cannot be constructed close to an adjacent land, and a large heavy machine is required. Furthermore, this method has a problem that the outflow of groundwater cannot be stopped, thereby affecting the surrounding groundwater level.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned conventional problems, and enables the construction of a continuous wall without moving the current ground to form a basement in a narrow site. It is an object of the present invention to provide a method of constructing a basement for a house which is lower in cost than the conventional one and can shorten the construction period.

[0005]

In order to achieve the above object, a construction method according to the invention of claim 1 is a method for constructing a basement for a residential house to be built on a small site, the method comprising the steps of: While excavating a vertical groove for constructing a continuous wall to a predetermined depth over a required range, filling a stabilizing solution for stabilizing the groove wall, after completion of excavation, inserting a reinforcing rod cage into the vertical groove, Concrete is poured from the bottom of the groove while being replaced with a stabilizing liquid, a reinforced concrete connecting wall is constructed in the ground, and then the ground surrounded by the connecting wall is excavated to a predetermined depth, and concrete for a basement floor slab is connected. The basement is built by connecting to the wall and casting.

According to a second aspect of the present invention, there is provided a method of constructing a basement for a private house, which is to be built on a small site.
Excavate a plurality of small holes as predecessor holes over a required range in the ground where the basement is to be built, at predetermined intervals to a predetermined depth, excavate between any of the small holes, and set a vertical groove for connecting wall construction At the same time as filling the stabilizing solution for stabilizing the groove wall, after completion of the excavation, inserting a steel cage into the vertical groove, and then placing concrete while replacing the concrete with the stabilizing solution from the bottom of the groove. Then, a reinforced concrete wall is constructed in the ground, and a reinforced concrete wall is constructed in the vertical trenches sequentially excavated in the same manner, and a continuous wall is constructed with the wall. It is characterized by excavating to the depth, constructing a basement by connecting concrete for basement floor slabs with connecting walls and casting.

[0007]

An embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, on a land of about 50 tsubo (it is necessary to have a road to accommodate a 4-ton car), and when constructing a basement for a residential house adjacent to the border with the adjacent land, number in the fixed-length guide wall 2 can form below the longitudinal grooves of predetermined spacing L ₁ comprising a H-shaped steel of the unit over a predetermined range in the ground 1 to be construction and is arranged through the fixed anchor 3. In this embodiment, FIG.
It is arranged as shown in FIG. The guide wall 2 is combined at a construction site into a predetermined length and shape. A connecting hardware (not shown) is used for the combination of the guide walls 2 and the combination at the corners. In this embodiment, the guide walls 2 are connected to each other continuously by the connection fittings. However, it is not always necessary to connect the guide walls 2 to each other. Good. Distance L ₁ of the are slightly wider than the width L ₂ of the longitudinal grooves to be drilled.

Next, as shown in FIG. 2 (A), between the guide walls 2 (the above-mentioned interval L ₁ ) at the screw type small hole excavating portion 6 attached to the end of the arm of the excavator 5.
A plurality of small holes 7 serving as preceding holes are excavated at a predetermined interval along the guide wall 2 along the guide wall 2 to a predetermined depth (about 5 m) (B). After excavating the small holes 7, the gap between the small holes 7 is replaced with a small hole excavating portion 6 at the tip of the arm of the excavator 5 as shown in FIG. On the day, the portion including the corner portion is excavated to the same depth as the small hole 7, and the vertical groove 10 for constructing the continuous wall is excavated. At this time, a rocking pipe (not shown) is used to partition adjacent portions to be excavated on the second and third days described later, and the concrete and the stable liquid are partitioned. During the excavation of the flute 10, a stable liquid such as bentonite is filled into the flute 10. Since the stabilizing liquid has a function of preventing the vertical groove 10 from collapsing, the vertical groove 10 is formed as a substantially vertical one as shown. The width of clamshell bucket excavating unit 8 La 2 so as to enable drilling corresponding to the width L ₂ of the longitudinal groove 10
It is formed in an ultra-thin shape of 50 mm to 300 mm, enabling excavation of a narrower width than the conventional minimum excavation width of 400 mm. In the above, by replacing the small hole excavation part 6 and the groove excavation part 8 with the same excavator 5, the small hole 7 and the flute
Although we excavated 10, this could be a separate machine. Also, the illustrated excavator 5 is very lightweight and simple, so that the boundary with the adjacent land can be constructed up to 50 cm.

After completion of excavation of the vertical groove 10 on the first day, a waterproof board (plywood) 11 is provided on the inner surface as shown in FIGS.
Lift the reinforcing bar cage 12 with the crane 13 and insert it into the vertical groove 10 filled with the stabilizing liquid.
Temporarily. In the above, the excavated part of the flute 10
One of the reinforcing bars 12 is inserted into each of them. The reinforcing bar basket 12 is formed by assembling and joining a vertical bar 12a, a horizontal bar 12b, and the like. On the inner surface of the waterproof board 11 on the side of the reinforcing rod cage, there is provided a projection 14 for fixing in concrete cast as described later so as not to cause peeling due to external water pressure. The mounting of the waterproof board 11 is performed by a board support hardware 15 or the like which is arranged in the thickness direction of the reinforcing bar cage 12 in a manner tangled with the reinforcing bars 12a, 12b and the like. The board 11 is not mounted over the entire height of the reinforcing bar 12, but is mounted over the height serving as the side wall of the basement, about 3 m in this example. By attaching the waterproof board 11 in this manner, the concrete to be poured is prevented from flowing into the inside (the basement side) and the concrete is not poured more than necessary, so that the amount of concrete can be reduced. In the case where the reinforcing bar cage 12 is long vertically, it is inconvenient for transportation or the like. Therefore, the reinforcing bar basket 12 may be divided into two parts at the root portion 16 below the board 11, and may be joined after being brought into the construction site.

After the rebar basket 12 is dropped into the flute 10 and inserted, the concrete is cut into the flute 10 by a tremy tube (not shown).
Then, the reinforced concrete wall 18 is constructed underground (in the vertical groove 10) as shown in FIG. During this casting, the concrete flows into the flute 10 while being prevented from flowing inward by the board 11, and spreads over the entirety.

After the construction of the reinforced concrete wall 18 on the first day as described above, the excavation of the flute 10, the insertion of the reinforced cage 12, and the concrete casting work are similarly performed on the second and subsequent days.
On the day, as shown in FIG. 4, the reinforcing cages 12 are continuously arranged in the longitudinal grooves 10 extending over the entire circumference, and are crushed into concrete to form the wall 18.
Is made into a continuous wall. The order of excavation, the number of days of excavation, and the like of the flute 10 shown in FIG. 2C are merely examples, and it is needless to say that such an order is not necessarily required. Also, in the above, each time after excavating the flute 10,
Is inserted and concrete is cast. However, it is also possible to excavate all the longitudinal grooves 10 and excavate the continuous longitudinal grooves 10 over the entire four circumferences, and then insert the reinforcing bar 12 sequentially and concrete.

As shown in FIG. 4, a plurality of reinforcing bars 12 are dropped and inserted and concrete is cast to form a continuous wall in which the reinforcing bars 12 are inserted side by side over the entire vertical grooves 10 (the vertical grooves 10 are omitted in the figure). After that, the ground 1 surrounded by the continuous wall 18 is excavated to a predetermined depth (for example, 3 m) by another excavator 20, but before that, the reclining beam 22 and the first floor beam are excavated.
Perform 23 precedent castings.

That is, after the construction of the connecting wall 18 and before excavation of the ground surrounded by the connecting wall 18, the guide wall 2 and the guide wall 2 face each other as shown in FIGS. A concrete formwork 25 is installed at the position, and concrete 27 is cast into the formwork with the connecting streaks 26 of the connecting wall 18 protruding,
The beam 22 is connected to the connecting wall 18 at the upper part of the connecting wall 18 and is installed so as to protrude slightly inside. An upper structural anchor 28 is provided on the lying beam 22 so as to protrude upward. At the same time, as shown in FIGS. 6, 7 and 8 (B), a substantially U-shaped beam driving form frame 30 is surrounded by connecting walls 18 so as to connect the guide walls 2 to each other. The concrete 32 in the formwork, and the floor beam 23 on the first floor
Connect with 22 and install. Reference numeral 31 denotes a support member for the beam driving formwork 30 provided as necessary, and reference numeral 33 denotes an upper structure anchor. The pre-casting of the girder 22 and the first-floor floor girder 23 leads to continuous walls
The 18 bulging cut beams become unnecessary, and the first floor beam 23 uses the ground before excavation as it is, so that temporary work such as temporary receiving supports can be omitted. Guide Wall 2 was removed after this,
Provide for reuse.

After the preceding beam 22 and the first floor beam 23 have been driven, the excavator 20 excavates the ground 1 surrounded by the continuous wall 18 as shown in FIG. Then, after digging to a predetermined depth, the connecting bar 35 that has been bent and inserted in advance in the connecting wall 18 near the digging bottom is dug up and raised, and is cast for a basement floor slab as shown in FIG. Connected to a reinforcing bar (not shown) in the concrete 36, and embedded together. This concrete 36
Before laying, the stones 37 may be laid underneath. Since the basement floor slab also serves as a base floor for supporting the load on the ground, the connection with the connecting wall 18 is important. The connecting bar 35 inserted into the connecting wall 18 in advance is surrounded by a protective material such as styrofoam or the like to protect the connecting wall 18 so that the concrete does not turn when the concrete is poured.

As described above, the waterproof board 11 of the connecting wall 18 and the basement floor slab 36 appear inside the basement as shown in FIG. 11, so that the waterproof board 11 is first placed as shown in FIG.
The vertical studs 38 are attached to the studs at predetermined intervals in the lateral direction via the mounting resin block 40, and a finishing material 41 such as a gypsum board is attached to the studs via the body edge 42. Next, a leveling mortar 44 is poured into the slab 36 and disposed, and after curing, a heat insulating material 45 is disposed thereon, and a finishing material 46 such as a gypsum board is stuck on the heat insulating material 45. 48 is a stud support member, 49 is a waterproof angle material, and 50 is a waterproof board or sheet. Thereafter, when the studs 38 and the rim 42 for the basement interior are attached, the state is as shown in FIG. 11, and after that, the above-mentioned wooden work on the ground and the interior work on the underground start. In this way, a residential basement 55 for a private house of a predetermined size is constructed.

In this embodiment, the basement 55 is constructed by constructing the rectangular connecting wall 18. However, the basement 55 is not necessarily required to be rectangular, and the basement may be constructed by constructing a circular or polygonal connecting wall. It goes without saying that it is good. Also, the waterproof board 11 shown in the embodiment is merely an example, and the protrusion 14 does not necessarily have to be provided on the inner surface, and the size, shape, and the like can be arbitrarily selected and adopted.

[0017]

According to the first and second aspects of the present invention, there is no need for extra digging and backfilling as in the prior art, and a continuous wall is constructed without moving the current ground. To make a residential basement for private residences. As described above, according to the present invention, construction can be performed without affecting a nearby foundation. In addition, since there is no pile driving vibration and there is little influence on the neighborhood, it is possible to build a basement on a small site. In addition, since soil retaining work is not performed as in the past,
There are many excellent effects such as shortening the construction period and reducing the cost.

[Brief description of the drawings]

1A and 1B show a guide wall arrangement state according to an embodiment of the present invention, wherein FIG. 1A is a sectional view, FIG. 1B is a plan view, and FIG.
FIG. 4B is an enlarged perspective view of a main part along line AA of FIG.

2A is a cross-sectional view showing a state in which small holes are excavated, FIG. 2B is a plan view showing a state in which small holes are drilled, and FIG. 2C is a plan view showing an excavation order between small holes.

3A and 3B show a trench excavation portion of the excavator, wherein FIG. 3A is a front view of the open state, and FIG. 3B is a side view.

FIG. 4 is a cross-sectional view showing a state in which a reinforcing cage is inserted into a vertical groove by a crane.

FIG. 5 (A) is a perspective view of a partially broken reinforcing bar, and FIG. 5 (B) is a cross-sectional plan view of a state in which it is disposed.

FIG. 6 is a cross-sectional view showing a state in which a lying beam and a floor beam on the first floor are constructed before excavating the ground surrounded by the continuous wall.

FIG. 7 is a plan view of FIG. 6;

FIG. 8A is a cross-sectional view showing a built-up state of a beam, and FIG.
It is sectional drawing which shows the construction condition of the floor beam of a floor.

FIG. 9 is a cross-sectional view showing a state in which the ground surrounded by the continuous wall is being excavated after constructing the jog beam and the floor beam on the first floor.

FIG. 10 is an enlarged partial cross-sectional perspective view showing a connection state of a reinforcing bar in concrete to be cast for a basement floor slab and a connecting bar of a continuous wall, and the like.

FIG. 11 is a sectional view showing a state where a basement floor slab is provided.

FIG. 12 is a cross-sectional view showing a state where a basement is constructed by installing floor truss beams on the first floor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 2 Guide wall 5 Excavator 6 Small hole excavation part 7 Small hole 8 Groove excavation part 10 Vertical groove 11 Waterproof board 12 Reinforced basket 13 Crane 18 Concrete wall (continuous wall) 22 Laying beam 23 First floor floor beam 41, 46 Finish Lumber 55 Basement

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Ishihara 6-5-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Shinjuku i-Land Tower 36F S.B.L. 6-5-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Shinjuku i-land tower 36th floor S.B.L. Co., Ltd. House and Living Laboratory (72) Inventor Naoko Senda 6-5-1 Nishi-shinjuku, Shinjuku-ku, Tokyo Tower 36F S.B.L., Ltd.

Claims (2)

[Claims] 1. A method of constructing a basement for a residential house for a private house to be built on a small site, comprising excavating a vertical groove for constructing a continuous wall to a predetermined depth in a ground on which the basement is to be constructed, to a predetermined depth. Filling a stabilizing solution for stabilizing the groove wall, after completion of excavation, inserting a reinforced cage into the longitudinal groove, and then pouring concrete while replacing the stabilizing solution from the bottom of the groove with a reinforced concrete beam. Build walls underground,
A method for constructing a basement for a residential building, comprising: excavating the ground surrounded by the continuous wall to a predetermined depth; connecting the concrete for the basement floor slab to the continuous wall; 2. A method for constructing a basement for a residential house to be built on a small site, comprising excavating a plurality of small holes as leading holes over a required range to a predetermined depth in a ground where the basement is to be built. Then, excavating between any small holes of the small holes, excavating a vertical groove for connecting walls to a predetermined depth, filling a stable liquid for stabilizing the groove wall, after completion of the excavation, the vertical groove A concrete cage is inserted into the groove, and then concrete is poured from the bottom of the groove while replacing it with a stabilizing liquid, a reinforced concrete wall is constructed in the ground, and a reinforced concrete wall is sequentially placed in a vertically excavated groove in the same manner. Building, constructing a connecting wall with the wall, then excavating the ground surrounded by the connecting wall to a predetermined depth, connecting the concrete for the basement floor slab with the connecting wall and casting and constructing a basement. How to build a basement for a house.