JPH09228379A - Footing of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a footing of a structure, by which the term of works can be reduced. SOLUTION: A footing has a building frame 10 in which many previously formed segments 30... are combined. The respective segments 30, 30... have inner void parts 31, 31... communicated in the extending direction of the building frame when they are combined with each other, and in the inner void part 31, a reinforcing bar 41 elongated in the extending direction is disposed and concrete 43 is filled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation of a structure, and more particularly to a foundation of a structure capable of shortening a construction period.

[0002]

2. Description of the Related Art The foundation of a structure is provided on the ground and supports the main body of the structure. This type of foundation is formed by pouring concrete on site using a formwork. It is common. Also, when the caisson foundation is submerged and buried in the ground, the caisson foundation may be formed by pouring concrete on site using a formwork.

[0003]

By the way, in order to obtain a large bearing capacity in such a concrete foundation, it is necessary to place a large amount of concrete in order to deeply bury it in the ground, which requires a long curing time. Need a period. Therefore, there is an inconvenience that a long construction period is required.

In view of the above circumstances, it is an object of the present invention to provide a foundation for a structure that can shorten the construction period.

[0005]

The basis of the first inventive structure of the invention is characterized in that it has a body formed by combining a number of preformed segments. That is, after a large number of segments have been combined to form a skeleton, it is possible to immediately proceed to the next operation without providing a waiting time.

A second aspect of the present invention is the foundation of the structure according to the first aspect, wherein each segment has an inner cavity communicating with the extending direction of the skeleton when assembled, Is provided with a long tension material in the extending direction and is filled with concrete. That is, because the tension material is embedded in the body with concrete,
The strength of the body is improved. In addition, embedding the tension material in the body is done by combining each segment, and then placing a long tension material in the extension direction in the inner cavity communicating with the extension direction of the body and concrete in the inner cavity. It can be easily done by placing.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the foundation 100 is
It has a cylindrical body 10. The skeleton body 10 has a large number of ring-shaped rings 20 that are combined so as to be continuously arranged in the vertical direction, and each ring 20 has a large number of segments 30 that are preformed in concrete.
Are assembled so as to be continuously provided in the circumferential direction, and are joined by bolts. Each segment 30 has a shape in which a rectangular plate body is curved in an arc shape along the circumferential direction.

Each segment 30 has a pair of inner cavities 31, 31 arranged in the circumferential direction.
2 penetrates vertically as shown in FIG. 2 and has a rectangular shape that is long in the circumferential direction when viewed from above as shown in FIG. As shown in FIG. 2, a pair of upper and lower bolt holes 33, 33 is formed in the inner side wall 31 of each of the side walls 32, 32 in the circumferential direction of each segment 30.
To the side wall 32 of the adjacent segment 30, the bolt holes 33, 33 of the side wall 32 of the adjacent segment 30 are arranged so as to communicate with each other, and the bolt holes 33, 33, 33, 33 which communicate with each other are connected to the bolt holes 33, 33, 33, 33. By inserting and tightening the long bolts 38, the segments 3 adjacent in the circumferential direction
0 and 30 are joined.

A pair of inner cavities 31, 3 of each segment 30
As shown in FIG. 3, fitting recesses 35, 35 with their edges cut away are formed in the upper end opening of each of the upper end openings 1, and as shown in FIG. There are provided annular projections 36, 36 that form a rectangular annular shape surrounding the lower end openings of the inner space portions 31, 31.

The vertically adjacent rings 20, 20 are assembled with the segments 30, 30 of both rings 20, 20 offset from each other by half the circumferential length of the segments 30, 30. , Vertically adjacent segment 3
The inner cavities 31 and 31 of 0 and 30 are respectively communicated with each other in the vertical direction, and the annular protrusion 36 of the upper segment 30 is fitted into the fitting recess 35 of the lower segment 30.
Therefore, each inner space 31 is communicated from the lower end to the upper end of the frame 10 shown in FIG. 1, and eight reinforcing bars 41 as tension members are inserted into each inner space 31 from the upper end to the lower end of the frame 10. 3 are arranged along the inner wall of the inner space portion 31 shown in FIG. 3, and each inner space portion 31 is filled with concrete 43.

Since the foundation 100 shown in FIG. 1 has the above-mentioned structure, it is possible to immediately proceed to the next work without waiting time after forming the skeleton 10 by combining the plurality of segments 30. Therefore, the construction period of the construction of the foundation 100 can be shortened.

Adjacent rings 20, 20 of this body 10
The inner space portion 3 communicating with each other in the extending direction of the body 10 is joined to each other.
This can be easily done by arranging the reinforcing bars 41 long in the direction of extension in 1 and 31, and placing concrete 43 in the inner hollow portions 31 and 31 of the reinforcing bars 41 and the concrete. 43 adjacent ring 2
It is possible to firmly bond 0 and 20 to each other. Further, the rebar 41 allows the skeleton body 10 to have a sufficient tensile strength in the extending direction thereof, that is, the vertical direction in FIG.

The adjacent rings 20, 20 are
By the rebar 41 and the concrete 43 continuously provided in the inner space portions 31, 31 communicating with the extending direction of the body 10,
The positional displacement in the circumferential direction and the horizontal direction is prevented.
In addition, as shown in FIG.
By this, the effect of preventing the positional displacement between the adjacent rings 20 in the circumferential direction and the horizontal direction is improved. Therefore, the shearing strength and the torsional strength of the body 10 in the horizontal direction can be sufficiently obtained.

Further, the vertically adjacent segments 30,
Since the 30 are staggered, that is, they are assembled in a state that they are offset from each other by half the length of the segment 30 in the circumferential direction, the joint portion (side wall 32) of the segments 30 and 30 does not become a strength weak point of the frame 10. It becomes a structure.

The adjacent segments 30, 30 of each ring 20 are firmly joined by long bolts 38.

Therefore, the foundation 1 having sufficient strength and rigidity
The frame 10 of 00 can be easily and quickly formed.

Further, the skeleton body 10 may be installed by sinking into the ground after being assembled, or may be assembled while sinking into the ground or assembled in the ground. After the installation, concrete is poured and filled in the bottom portion inside the skeleton 10.

The segment 30 of the above embodiment does not necessarily have to be formed of concrete, and may be formed by combining steel plates and steel materials.

Although eight reinforcing bars 41 are provided as the tension members, a PC steel material may be provided instead of the reinforcing bars 41. In this case, since tension can be applied to the PC steel material in advance, the joining force between the rings 20 can be increased.

Further, the skeleton body 10 is not limited to a cylindrical shape, but may be a rectangular cylinder (so-called box), a cylinder having a horizontal cross section, an oval shape, or an elliptical shape.

[0021]

According to the foundation of the structure of the first invention of the present invention, after the structure is formed, the next work is immediately started without providing a waiting time for concrete curing as in the conventional case. Therefore, the work period can be shortened.

According to the foundation of the structure of the second invention of the present invention, in addition to the above effects, there is an effect that the strength of the skeleton can be improved by easy construction.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a foundation of a structure of the present invention.

FIG. 2 is a front view showing the joining of the rings of the basic skeleton of FIG.

3 is a plan view showing the joining of the segments of the ring of FIG. 2. FIG.

[Explanation of symbols]

 10 ... Skeleton 30 ... Segment 31 ... Inner space 41 ... Reinforcing bar (tensile material) 43 ... Concrete 100 ... Foundation

Claims (2)

[Claims] 1. A foundation of a structure, characterized in that it comprises a preformed body of a plurality of segments which are combined together. 2. Each of the segments has an inner hollow portion that communicates in the extending direction of the skeleton when combined, and a tension member long in the extending direction is arranged in the inner hollow portion. The foundation of a structure according to claim 1, wherein the foundation is filled with concrete.