JP2013159897A - Foundation construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a construction period by simplifying processes of constructing a foundation at a construction site.SOLUTION: Steel-made members are assembled at a factory in advance, and arranged and interconnected at a construction site according to design drawings, and piles are driven after the steel members are arranged. In a method of assembling the steel-made members from the beginning at the construction site, more processes at the construction site are required and a construction period becomes longer, but when the steel members are assembled at the factory in advance, the processes at the construction site can be simplified to contribute to shortening of the construction period at the construction site. Positions where the respective piles are driven need to be accurately measured in a method of arranging the steel-made members after driving the piles, but the sizes, shapes, etc., of the steel-made members are already based upon the design drawings in the method of driving the piles after the steel-made members are arranged, so that when the steel-made members are connected at the construction site, the positions where the piles are driven are naturally determined based on the positions of the steel-made members having been arranged.

Description

  The present invention relates to a method of building a building foundation.

  When building foundations for buildings, generally, piles are driven into holes drilled in the ground, steel members are passed between each pile, and the horizontal level is adjusted. A formwork such as wood is attached to a steel member, and concrete is cast. For example, Patent Document 1 discloses a method in which a pile is driven into the ground and a concrete is placed inside a formwork member disposed so as to surround the protruding portion of the pile.

JP 2002-309589 A

  By the way, against the background of rising prices of building materials and labor costs of workers at construction sites, it is required to simplify the process when building a building foundation as much as possible to shorten the construction period. Then, this invention aims at simplifying the process of building a foundation in a construction site, and implement | achieving construction period shortening.

  The present invention includes a step of arranging a plurality of pre-assembled steel members on a construction site and interconnecting them, a step of driving a pile into the ground based on the position of the connected steel members, and a pile Provided is a foundation construction method comprising a step of attaching a mold to the steel member after being driven and a step of placing concrete in a region surrounded by the mold.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to simplify the process of constructing a foundation at a construction site and to shorten the construction period.

It is a perspective view explaining inking process. It is a perspective view which shows a mode when the foundation frame is assembled. It is an elevation view explaining a basic frame assembly operation. It is an elevation view for explaining the horizontal level adjustment work. It is a top view explaining the excavation work of a hole. It is an elevation view explaining the excavation work of a hole. It is an elevation view explaining the driving operation of the pile. It is a perspective view explaining the attachment work of a formwork. It is a perspective view explaining concrete placement work.

[Embodiment]
Hereinafter, the foundation construction method according to the present embodiment will be described.
The feature of the foundation construction method according to this embodiment is that the steel members themselves are not assembled at the construction site from scratch, but are assembled in advance at the factory, and these are arranged and connected to each other along the design drawings at the construction site. The point is not the order of placing the steel members after driving the piles, but the point of driving the piles after placing these steel members. The method of assembling steel members from scratch from the construction site increases the number of processes at the construction site and lengthens the construction period, whereas steel members should be assembled in advance in the factory according to the design drawings. For example, the process at the construction site can be simplified and the construction period at the construction site can be shortened. In addition, in the method of placing steel members after driving piles, the position where each pile is driven must be measured and determined one by one, but in the method of placing piles after placing steel members, the steel Since the dimensions and shape of the steel parts already follow the design drawings, when the steel members are arranged and connected according to the design drawings at the construction site, the piles are based on the position of the steel parts. The position to shoot will be determined naturally. Therefore, it is possible to simplify the process at the construction site and reduce the construction period. Hereinafter, the foundation construction method according to the present embodiment will be described in detail.

(1) Inking work As shown in FIG. 1, a worker S designs on a concrete floor (referred to as a surface plate P) having a predetermined thickness placed on a crushed stone. Based on the drawing, a line L necessary for constructing the foundation is drawn with black or the like. This is called inking work, and the line L designates the position where the steel member is arranged.

(2) Foundation frame assembly operation Next, the worker S arranges two types of steel members 10a and 10b at the position of the line L drawn in the marking operation, and connects them together. A structure called a basic frame is completed by the connected steel members 10a and 10b. As shown in FIG. 2, a hollow pipe-shaped steel member 10 a is arranged in a circular portion of the line L, and a truss structure steel member 10 b is arranged in a straight portion. These steel members 10a and steel members 10b are not assembled from the ground up at the construction site, but a factory worker confirms their vertical, horizontal, diagonal, etc. dimensions at the manufacturer's factory. It is pre-assembled by using welding or welding and transported to the construction site. For this reason, as shown in FIG. 3, the specific work procedure at the construction site is specified by the line L after the steel member 10 a or the steel member 10 b is lifted by the crane vehicle 101 operated by the worker S. The steel member 10a and the steel member 10b are arranged at the positions, and these are coupled by a manual operation of the worker S with a coupling tool such as a bolt or a nut (not shown). Thereby, between the adjacent steel members 10a is connected by the steel member 10b. Furthermore, as shown in FIG. 5 to be described later, the strength may be further increased by connecting the adjacent steel members 10b with a reinforcing member 10c (in FIGS. 2, 8, and 9, the contents of the drawings). (The illustration of the reinforcing member 10c is omitted). As a result, when the building site is viewed from above in the vertical direction, a lattice-shaped foundation frame composed of the steel member 10a and the steel member 10b is constructed.

(3) Horizontal level adjustment work Next, the worker S performs horizontal level adjustment work. More specifically, the operator determines whether the upper end surface of the steel member 10b is horizontal and whether the upper end surface of the steel member 10b is as high as the design drawing. Check with surveying instrument 102 or the like. Then, if the confirmation result is not intended, the worker loosens or tightens the bolt or nut connecting the steel member 10a and the steel member 10b, and the position of the steel member 10b The posture is changed to adjust the level and height of the steel member 10b.

(4) Hole excavation work Next, as shown in FIGS. 5 and 6, the worker S inserts the auger 14 attached to the work vehicle 103 vertically into the hollow portion of each steel member 10a from above. Then, by rotating the tip against the surface plate P, a hole H extending in the vertical direction, for example, having a depth of about 1 m is formed.

(5) Pile driving operation Next, as shown in FIG. 7, the worker S attaches the hollow portion of the steel member 10 a to the pile 10 d attached to the work vehicle 104, for example, about several meters long. Through each hole H in the vertical direction and further driven into the ground. That is, since the position of the hollow part of the steel member 10 is determined by arranging and connecting the steel members 10a and 10b according to the design drawing, the pile in the ground is based on the position of the steel members 10a and 10b. 10d will be driven. And worker S fixes a foundation frame and pile 10d, and cuts an extra portion of pile 10d.

(6) Work of attaching formwork Next, as shown in FIG. 8, the worker S forms a wooden formwork with respect to the steel members 10a, 10b on the outermost side among the steel members 10a, 10b. 10e is attached.

(7) Concrete Placing Work Finally, as shown in FIG. 9, the worker S pours concrete from the work vehicle 105 into the area surrounded by the mold 10e until it reaches the vicinity of the upper end of the mold 10e. Thereby, concrete placement is performed.
The foundation of the construction site is constructed as described above. According to the present embodiment, as described above, it is possible to simplify the process at the construction site and reduce the work period.

10a, 10b Steel member, 10c reinforcement member, 10d pile, 10e formwork, S worker, P surface plate, L wire, H hole, 101 crane, 102 surveying instrument, 103, 104, 105 work vehicle.

Claims (1)

Arranging a plurality of pre-assembled steel members on the construction site and interconnecting them;
Driving a pile into the ground based on the position of the connected steel members;
Attaching a formwork to the steel member after the pile is driven;
And a step of placing concrete in an area surrounded by the formwork.

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