JPH0376931A - Construction of housing foundation - Google Patents

Abstract

PURPOSE:To reduce construction cost by placing cover bodies having tubular bodies at their centers on the upper end faces of unhardened piles made of soil cement of the like, and by inserting, after this, leg members of a frame-shaped foundation unit into the tubular bodies and by fixing them thereto with the cement made to harden. CONSTITUTION:A foundation unit 2 is made up of leg members 3 made from square steel pipes or the like and beam members 7, and each one holding hole 8 is provided to each of the leg members in a position at a specified distance from the upper end 3a thereof. A square tubular body 4 is erected upright at the center of a disk body 5 and is fixed thereto with bolt holes 6 provided on both the side faces thereof, and a cover body 1 is formed therewith. Then holes are bored into the earth in positions corresponding to those of the leg members 3, and ground improvement piles 9 are made up thereby with cement milk injected into the holes. While the piles are in unhardened state, the covers 1 are set on the upper face 9a of the piles, and the leg members 3 are then fit into the tubular bodies 4 and are fixed thereto with bolts and nuts with the holes 6 and 8 agreed with each other. After this, the piles 9 are made to harden. Thereby accuracy in constructing a foundation can be improved, while construction costs and term of works can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of constructing a foundation for a house using a steel frame foundation unit, which is suitable for general houses.

[Conventional technology]

BACKGROUND ART Traditionally, the foundations of general houses have been applied to independent foundations made of concrete and continuous foundations called cloth foundations, which are constructed, for example, in the following manner. In other words, the foundation of the house to be built is laid with chestnuts, and concrete is poured on top to form the base. Next, the horizontal reinforcements are tied with wire to the vertical reinforcements set up from this base, formwork is erected on both sides of these reinforcements at a certain width, and concrete is poured into the formwork. Form a rising part. After the concrete hardens, the formwork is removed and the foundation of the house is formed.

However, in order to measure the dimensions of the foundation on site and maintain the distance between the formwork at a predetermined interval, it is necessary to construct the formwork using spacers, clampers, etc., and the framework requires concrete pouring. Because it requires sufficient strength to withstand heavy lifting, this work is not something that just anyone can do, and requires workers from various professions such as formwork carpenters, earthworkers, and reinforcing steel workers.Furthermore, concrete has a curing period, so It requires manpower and time.

For this reason, recently, soil improvement piles made of soil cement, etc. are driven from the surface of the ground to the ground on the required part of the land where a house is to be built, and a steel column is inserted and lowered from the center of the top end of the pile. At the same time, a method of constructing the foundation of a house by protruding the tip to form a steel frame leg and connecting these steel frame legs with a steel beam began to be used.

[Problem to be solved by the invention]

However, the above construction method was cumbersome because after the steel columns were erected, the upper parts of the piles (the protruding legs) had to be connected with steel beams to form the foundation of the house.

The inventors of the present invention have conducted various studies in order to solve this inconvenience, and have found that building a house foundation will be easier if a foundation unit that has been assembled in advance according to the drawings is used.

The present invention has been made based on the above idea, and an object of the present invention is to provide a method for constructing a housing foundation that is extremely easy to construct on-site.

[Means to solve the problem]

In order to achieve the above object, the method of the present invention includes a step of constructing a foundation unit consisting of a plurality of columns and beams connecting them with a steel frame, and a step of constructing a foundation unit on the ground to which the foundation unit is to be fixed. A process of driving soil improvement piles made of soil cement, etc. into the ground facing the body, and inserting the legs of the foundation unit in the center while the soil cement, etc. is fully hardened. a step of setting a lid body to which a cylindrical body is integrally attached on the upper end surface of the soil improvement pile; pushing the leg portions of the foundation unit through the cylindrical body of the lid body; and a step of locking.

[Effect]

Since the housing foundation construction method of the present invention has the above configuration, the factory-produced foundation unit is transported to the site, and the partially hardened ground is poured on the housing construction site in accordance with the leg positions of the foundation unit. A lid body is placed on the upper end surface of the improved pile, the legs of the foundation unit are inserted into the pile through the cylindrical bodies of the respective lid bodies, and the legs are locked at a predetermined position on the cylindrical body. , the housing foundation is constructed.

〔Example〕

1 to 3 show an example of a lid, a basic unit, and a leg used in the method of the present invention, and reference numeral 1 in the figures indicates the lid.

The lid body 1 is composed of a disc body 5 in which a rectangular cylinder body 4 through which the rectangular cylinder-shaped leg portions 3 of the basic unit 2 are pushed is vertically fixed. A bolt hole 6 is provided vertically penetrating the side surface.

The foundation unit 2 is formed by combining steel frames as shown in FIG. It consists of a beam body 7 that is perpendicular to the legs 3 that connect the legs 3 to each other. A locking hole 8 is located at a predetermined distance from the upper end 3a of the leg portion 3, and which matches the bolt hole 6 of the square tube body 4 when the leg portion 3 is pushed through the square tube body 4 of the lid body 1. is drilled.

To construct a house foundation using the above foundation unit 2,
First, ground improvement piles 9 are driven from the ground surface toward the ground in accordance with the position of the legs 3 of the foundation unit 2, as shown in FIG. 2(b). At this time, the upper end surfaces 9a of the piles 9 are made to be on the same plane.

There are various methods for driving the ground improvement piles 9.

For example, while drilling a hole 22 in the ground with an earth auger 21 as shown in Figures 4(a) and (b), cement milk is injected as shown in Figures 4(c), (d), and (e). 9 is formed. While the resist 9 is in a fully hardened state, the leg portion 3 is inserted and lowered as shown in FIG. 4(f).

In the present invention, while the driven pile 9 is still in a partially hardened state, the cover 1 is set on the upper end surface 9a of the pile 9 as shown in FIGS. 5(a) and 5(b). Then, as shown in FIGS. 6(a) and 6(b), the lower end of each leg 3 of the base unit 2 is fitted into the rectangular cylinder 4, and the beam 7
While holding it horizontally, insert it into the pile 9 and let it sink. When the locking hole 8 of the leg part 3 matches the bolt hole 6 of the rectangular tube body 4, the bolt 10 is pushed through the bolt hole 6 and the locking hole 8 and fastened with the bolt 11, and the building foundation is created. . The length of the leg portion 3 inserted into the pile 9 is desirably 2 m or more in order to strengthen the foundation.

Since each leg 3 of the base unit 2 is supported by the pile 9 and the disc body 5 of the lid I, the base unit 2 cannot be further lowered after the lid 1 and the legs 3 are locked. There isn't.

In addition, in the above description, the rectangular cylinder 4 of the lid l and the leg part 3 of the base unit 2 are fastened with two bolts, and the number of bolt holes 6 and locking holes 8 is The number of bolts can be arbitrarily selected by increasing or decreasing. Further, it is preferable to use bolts for locking because the locking force is large, but for example, as shown in FIG.
2 may be provided to act as a stopper during the insertion and descent process of the leg portion 3.

It is also possible to attach the above-mentioned lid to the leg in advance and have the top surface of the pile come into contact with the lid during the process of the leg being inserted into the pile and sinking, but it is also possible to attach the lid to the top of the pile in advance. It is preferable to set it in advance because it prevents the top surface of the pile from being damaged.

The above-mentioned foundation units are manufactured in a factory according to the drawings, so their accuracy is high, and the larger the foundation unit, the better for construction purposes. I can decide. - When the house foundation for the eaves is made up of multiple foundation units, the house foundation is created by attaching these units to piles and then connecting each unit with beams.

〔Effect of the invention〕

As described above, in the housing foundation construction method according to the present invention, a factory-produced foundation unit is transported to the site, and a cover body is attached to the upper end surface of the ground improvement pile that is driven in accordance with the leg position of the foundation unit. The end of the leg is inserted into the rectangular cylinder of these lids, inserted into the pile and lowered, and the leg is secured at a predetermined position to the rectangular cylinder. It requires less, and the period is also significantly shortened.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the lid body, FIG. 2(a) is a perspective view showing an example of the basic unit, and FIG. 2(b) is a perspective view showing an example of the basic unit.
FIG. 3 is an enlarged perspective view of the legs of the foundation unit; FIG. 4 (a) is a perspective view showing the piles corresponding to the foundation unit in
b ) (c) (d) (e) (f) are diagrams showing an example of the procedure for driving soil improvement piles, Figures 5 (a) and (b)
Figure 6 (a) is a diagram of attaching the cover to the top surface of the pile that has been driven.
)(b) is a diagram in which the legs are inserted into the stake through the rectangular cylinder of the lid body, and is then locked. Figure 7 shows the protrusion fixed to the leg abutting the upper edge of the rectangular cylinder of the lid body. FIG. ■...Lid body, 2...Basic unit, 3.
...Legs, 3a...Top end, 4...
・Square cylinder body, 5... Disc body, 6... Bolt hole, 7... Beam body, 8... Locking hole, 9
...Soil improvement pile (pile), 9a...Top end surface, 10...Bolt, 11...Nut, 12...Protrusion, 21... Earth auger 22... Hole.

Claims (1)

[Claims] (1) The process of forming a foundation unit consisting of a plurality of columns and beams connecting them using steel frames, and the process of forming a foundation unit from the ground to the ground facing the columns on the ground where the foundation unit is to be fixed. There is a process of driving soil improvement piles made of soil cement, etc., and, while the soil cement, etc. is fully hardened, a lid body is integrally attached to the center of which is a cylindrical body through which the legs of the foundation unit are inserted. A step of setting the base unit on the upper end surface of the soil improvement pile, and inserting the legs of the foundation unit through the cylinder of the lid body, inserting it into the soil improvement pile and lowering it, and locking the cylinder and the leg. A method for constructing a foundation for a house, comprising the steps of: