JP2951289B2 - Beam mounting level adjustment structure in building structure using pile as pillar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building structure in which a pile is directly used as a pillar by a pile pillar comprising an underground pile part and a ground pillar part, and more particularly to such a building structure. The present invention relates to a structure for adjusting a beam mounting level in a structure.

[0002]

2. Description of the Related Art The applicant of the present application has proposed that a pile be used as a pillar as it is as a building structure suitable for low-rise stores and warehouses and capable of significantly reducing building costs (Japanese Patent Application No. 8-275116). In the building structure using this pile as a pillar, the construction time is greatly shortened and the construction cost is reduced because the foundation footing and the underground beam are not required. On the other hand, it is a prerequisite for building structures to have the required strength against earthquakes, etc., so the surface layer of the site ground was improved. This is based on the following analysis results.

[0003] In Fig. 3, a wire rod L is a model of a pile column used in this analysis. In the analysis, the total length of this wire L was 13
000 mm, the length L _P of the wire L corresponding to the pile buried in the ground is 9000 mm, and the length L _C corresponding to the pillar erected on the ground is It was 4000 mm. The tip of該線material L (the lower end) as well as pin support, as in the portion L _P corresponding to the pile portion corresponding to the elastic restoring force receiving pilings from the ground, a total of nine spring k _1, k the ₂ ... k ₉ are connected horizontally at 1000mm intervals. An axial force P is applied to the top end of the wire L as an external force.
And a horizontal force H was applied.

As a result, among the springs k ₁ , k ₂ ... K ₉ , the one that controls the deformation mode of the wire L is the highest spring k ₁ , and the remaining springs k _{2 to} k ₉ The impact was found to be small. That is, when the spring constants of these springs k ₁ , k ₂ ... K ₉ are set to various sizes, and how the deformation mode of the wire L changes is examined, the spring constant of the spring k ₁ changes. And the deformation mode of the wire L also greatly changes, but only by changing the spring constants of the other springs k _{2 to} k _9, no significant change was found in the deformation mode of the wire L.

As a result, it has been found that if only the ground characteristics of the surface layer can be accurately grasped, the deformation of the column can be controlled. This makes the evaluation of the whole system extremely easy. That is, in case of applying the present analytical model to the specific construction site defines a spring constant of each depth by boring the site soil, it the spring constant of the spring k _1, k ₂ ... k ₉ Although this will be applied, it is difficult to obtain an accurate value because the boring data has large variations. However, what is required accuracy is only the spring constant of the spring k ₁ of the surface layer, it the spring constant of the deeper somewhat may lack accuracy. Therefore, the surface layer if to ground improvement, the ground characteristics artificially can operate, therefore, it is possible to accurately calculate the spring constant of the spring k _1. Thus, highly reliable evaluation is possible, and the required strength of this type of building structure can be sufficiently ensured. Depending on the ground conditions,
In some cases, it may not be necessary to improve the ground.

[0006]

In this type of building structure, it is necessary to match the top levels of the pile columns themselves with each other.
The amount of insertion of each pillar into the ground must be adjusted. However, the adjustment work is extremely difficult. On the other hand, if the levels are not the same, beams cannot be installed horizontally above it.

Therefore, there arises a technical problem to be solved in order to simplify the adjustment of the mounting level of the beam in this type of building structure, and the present invention aims to solve the problem. .

[0008]

DISCLOSURE OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and has a function as a pile material and a pillar material composed of an underground pile portion and a ground pillar portion. In an architectural structure using a pile as a pillar in which a beam is erected above the top end of the pillar, an anchor plate is provided at the top of the pillar, A bolt is erected on the upper surface of the plate, and the level of the lower flange of the beam, in which a bolt hole for penetrating the bolt is opened, is adjusted with a lower nut screwed into the bolt, and An object of the present invention is to provide a beam mounting level adjustment structure in a building structure using a stake in which a beam is fixed to a bolt as a pillar by sandwiching the lower flange with an upper nut screwed to the bolt. .

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
And FIG. FIG. 1 shows a state in which a skeleton of a building structure 11 using a pile as a pillar is constructed. No foundation footing or underground beam is installed, and an underground pile section 12p and a ground pillar section are shown. Pillar column 12 consisting of 12c
In addition, the function of the building structure 11 as a pile material and the function as a pillar material are combined.

[0010] A solidifying agent is injected into the surface layer of the ground 13 to improve the ground. Thereby, the pillar portion 12c
Is controllable, and the required strength of the building structure 11 is sufficiently ensured. This ground improvement part 13a
Is approximately 1 m, but is increased or decreased according to the height of the building structure 11, the load applied to the pillars 12, 12,..., The physical properties (hardness) of the solidifying agent, the state of the ground 13, and the like. Also,
It is desirable to improve the ground on the entire site of the building structure 11, but in consideration of cost, it is preferable to form a lattice shape that connects the pillars 12, 12 ... vertically and horizontally. If so, the ground improvement unit 1
3a has the same effect as the underground beam, and is excellent in function. In some cases, it may not be necessary to improve the ground depending on the ground conditions.

Then, a standing hole 14 is formed in the ground 13 with an auger or the like.
Is excavated, the cement hole 15 is filled with the cement milk 15, and the lower part of the pillar 12 is inserted to form a pile portion 12p. As a result, the remaining portion of the pile column 12 is erected on the ground to form a column portion 12c. Thereafter, the column 12c is finely adjusted to be vertical, and the cement milk 15 waits for solidification. Here, the pile pillar 12 uses a ready-made pile, such as a PHC pile, a PRC pile, and a steel pipe wound PC pile.
Further, the tip (lower end) of the pile portion 12p is set to reach the support layer 13b, and at this time, the top end of the column portion 12c is set to reach the ceiling height of the building structure 11.

As shown in FIG. 2, the pillar 12c (pile pillar 1)
A pile cap 16 is mounted on the top end of 2). An anchor plate 1 is provided on the upper surface of the pile cap 16 by using a screw hole (not shown) for tensioning the PC steel wire of the pile cap 16.
7 and the anchor plate 17
The core for correcting the misalignment of the pillar 12 is written on the upper surface of the pile, and the regular stud bolt positions are obtained at four positions before, after, right and left of the regular core position, and the stud bolts 18, 18 are provided at the regular stud bolt positions. , 18, 18 are erected by welding. Then, the stud bolts 18, 18, 18, 18
The lower nut 19 is screwed into each of them, and the lower nut 19 is adjusted so that the upper end surface level thereof becomes a regular lower end surface level of the beam.

After performing such an operation for each pile column 12, a bolt hole 22 formed in a lower flange 21 of a beam 20 made of an H-shaped steel material is inserted into a stud bolt 18, and the stud bolt 18 is The beam 20 is fixed to the stud bolt 18 by screwing the upper nut 23 into the protruding end portion and clamping the lower flange 21 between the upper nut 23 and the lower nut 19. Thus, as shown in FIG. 1, between the top ends of the plurality of pile posts 12, 12,..., Regardless of the top end accuracy of the pile posts 12, 12,. It is erected horizontally. As described above, since the level adjustment of the beam 20 is performed by the lower nut 19, it is needless to say that the level adjustment of the pile column 12 is performed by adjusting the amount of underground insertion of the pile column 12 to match the top level. Compared to the method of laminating the liner plate on the top end, it can be performed very simply and quickly.

After that, folded roof 2
4, the concrete 25 to be the floor slab of the first floor is poured on the surface of the ground, and furthermore, an outer wall (not shown) is installed to complete the building structure 11.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0016]

As described above, according to the present invention, the lower nut is screwed into the bolt, and the mounting position of the beam is adjusted by adjusting the screwing position of the lower nut. It is extremely simple and quick to construct, as well as a method of adjusting the underground insertion amount of the underlayer to match the top level, as well as a method of laminating the liner plate on the top of the pillar. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a building structure using a pile as a pillar.

FIG. 2 shows the embodiment of the present invention and is a side view of a main part around the top end of a pile column.

FIG. 3 is an explanatory diagram of an analysis model for examining deformation of a pile due to an external force.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Building structure 12 Pillar 17 Anchor plate 18 Stud bolt 19 Lower nut 20 Beam 21 Beam lower flange 22 Lower flange bolt hole 23 Upper nut

Claims (1)

(57) [Claims] 1. A pile pillar comprising an underground pile part and a ground pillar part, having both a function as a pile material and a function as a pillar material.
In an architectural structure using a pile as a pillar, a beam is erected between the upper ends of the pile column, an anchor plate is provided at the pile column top, and bolts are erected on the upper surface of the anchor plate. At the same time, the level of the lower flange of the beam having the bolt hole through which the bolt is inserted is adjusted with the lower nut screwed to the bolt, and the lower nut and the upper nut screwed to the bolt. A beam mounting level adjustment structure in a building structure using a pile as a pillar, wherein the lower flange is clamped to fix the beam to a bolt.