JPH0497020A - Construction of foundation of building - Google Patents

Abstract

PURPOSE:To raise the accuracy of construction by a method in which pipes are set on given positions for columns of a building and connected with beams, they are surrounded by a formwork for foundation, and concrete is placed to fix the columns to the pipes. CONSTITUTION:Pipes 1 are set on given positions on a footing 16, connecting beams 2 are set between the pipes 1 to connect the beams 2 with the pipes 1, and the level of the beams 2 is regulated by level-regulating bolts 9. A formwork 20 for forming foundation is set around the pipes 1 and the beams 2 and concrete slurry is placed to a level shown by two-dotted line 22. The lower part of the columns 19 is inserted into the pipes 1 through their opening 1A, the columns 19 are positioned, and a grout 24 is packed into the pipes 1 to fix the columns 19 to the pipes 1. The constructing accuracy of the foundation can thus be raised and the construction can be easily attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of constructing a concrete foundation for a building, and can be used for the foundation of a building with a steel frame structure.

[Background technology]

In buildings with steel frame structures, there are two types of column bases, which are the joints between columns and concrete foundations: embedded column bases and exposed column bases. Embedded column bases are made by embedding a foundation column with stud bolts protruding into the concrete foundation, and connecting a building column to the top of the foundation column that protrudes from the top of the foundation. Exposed column bases are made by combining reinforcing steel bars vertically and horizontally to form the frame of a concrete foundation, with anchor bolts protruding from the top of the concrete foundation, and these anchor bolts fix the base plate installed at the bottom of the building column. .

[Problem to be solved by the invention]

According to the conventional method described above, the placement positions of foundation columns and anchor bolts are determined by marking work, etc., but this work cannot always be done accurately and errors occur, so it is difficult to perform foundation construction. The accuracy was low. In addition, in order to form the framework of a concrete foundation by combining reinforcing reinforcing bars vertically and horizontally, a skilled worker is required, and this work takes a lot of time and effort. Even if industrialization was achieved for buildings that could be built higher up, conventionally it took a long time to construct the foundations.

The purpose of the present invention is to improve the construction accuracy of foundations,
Another object of the present invention is to provide a building foundation construction method that facilitates the construction work and shortens the construction period.

[Means to solve the problem]

The building foundation construction method according to the present invention involves arranging pipe members at predetermined positions for each of the pillars of the building, connecting these pipe members with connecting rods manufactured in advance at a factory, and then , the work of surrounding the pipe member and the connecting pipe with a foundation forming form and pouring concrete slurry therein; and inserting the lower part of the column into the pipe member and filling the pipe member. It is characterized in that the pillars are fixed with grout material.

In the above, either the work of pouring concrete slurry inside the foundation forming form or the work of inserting the lower part of the column into the pipe member and fixing it with grouting material may be performed first. Moreover, the formwork for forming the foundation may be removed after solidification of the concrete slurry, but may be left as is. When left in place, the formwork is used as a surfacing material for the foundation.

[Effect]

When the pipe members are connected with connecting pipes, the distance between the pipe members is determined, and since the connecting pipes are manufactured in advance at the factory and transported to the construction site, their lengths are accurate. Therefore, the spacing between the tube members can be set to a predetermined accurate spacing, and the foundation can be built with high precision. In addition, the pipe members and connecting pipes form the framework of the foundation, and once the pipe members are connected with each other using the connecting pipes, the work of assembling this frame is completed, and this work can be done easily and in a short time, so it is possible to easily construct the foundation. Work can be made easier and shorter.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the members forming the framework of the foundation, and this framework is formed by a tube member 1 and a connecting pipe 2. The pipe member 1 is made of a square steel pipe, and only its top surface is open. The connecting girder 2 is a steel beam made by joining an upper member 3 and a lower member 4 with diagonal members 5, and has a lattice beam shape.

A formwork holder 6 is attached to the upper material 3 and the lower material 4 in a direction perpendicular to them, and holes 7 are formed in the vertical parts 6A at both ends of the formwork holder 6, and holes 7 are formed on the back side of the holes 7. Nut 8 is fixed. Further, a height level adjustment bolt 9 is vertically provided on the bottom material 4, and this bolt 9 is screwed into a nut lO fixed to the bottom material 4, so if the bolt 9 is rotated, the bottom material 9 of the bolt 9 The amount of protrusion from the connecting wire can be adjusted, and thereby the height level of the connecting wire 2 can be adjusted.

A plurality of the above-mentioned formwork holders 6 and height level adjustment bolts 9 are provided in the longitudinal direction of the connecting wire 2, respectively.

Of the four sides of the pipe member l, a bracket 11 is attached to the side to which the connecting rod 2 is connected. There are two holes in each bracket.
is formed.

Further, holes 13 are formed at the ends of the upper material 3 and lower material 4 of the connecting wire 2, and by passing bolts 14 through these holes 12 and 13 and tightening nuts 15, the pipe member 1 and the connecting wire 2 are connected. A connection is now being made.

In the above, the connecting pipe 2 is manufactured in advance at a factory together with the pipe member 1, and then transported to the construction site.

Each connecting ring 2 is manufactured to have a precise length corresponding to a predetermined spacing between the pipe members 1 to be connected to each other.

Next, we will explain the foundation construction procedure.

The basis of this example is as shown in Figure 3.
A wide footing part 16 and a narrow rising part 17 above it
The pipe member 1 and the connecting pipe 2 form the framework of the upright part 17, and the waste concrete 18
A footing portion 16 is previously formed on the top.

As shown in FIG.
Place the pillars 19 of the building (see FIGS. 3 and 4) at the predetermined positions above, place the connecting rods 2 between these pipe members l, The pipe members 1 are connected to each other using the connecting wire 2. At this time, the height level of the connecting wire 2 is adjusted using the height level adjustment bolt 9. In the drawing, the vertical dimension of the tube member 1 reaches the footing part 6, but the vertical dimension of the tube member 1 is shortened (the height level adjustment bolt 9 is used to connect the tube member 1 through the connecting thread 2). It may be supported in a floating state from the footing portion 16.

Next, as shown in FIG. 2, a base molding form 20 is placed around the outside of the tube member 1 and the connecting casing 2.

A ring-shaped protrusion 20A is provided on the inner surface of these formworks 20 at a position corresponding to the vertical part 6A of the formwork holder 6, and bolts 21 inserted into this protrusion 2OA from the outside of the formwork 20 are provided. is passed through the hole 7 of the vertical portion 6A, and further screwed into the nut 8.

As a result, the formwork 20 is connected to the formwork holder 6 and maintained in an upright state.

After the pipe member 1 and the connecting casing 2 are surrounded by the formwork 20 in this manner, concrete slurry is cast inside the formwork 20. This slurry is placed up to the height indicated by the two-dot chain line 22 in FIG.
Ensure that the exposed condition of

After the concrete slurry has solidified, the bolts 21 are loosened and the formwork 20 is removed. As a result, as shown in FIG. 3, a concrete foundation 23 is completed in which a standing portion 17 is provided on the footing portion 16. This basic 2
Since a depression is formed on the side surface of the rising part 17 of No. 3 by the ring-shaped protrusion 2OA, this depression is filled with concrete slurry to finish the surface of the rising part 17.

Next, inside each tube member 1, as shown in FIG.
The lower part of the pillar 19 is connected to the upper opening 1. The grout material 24 is then inserted into the tubular member l as shown in FIG. Before filling the cloud material 24, the pillars 19 are positioned with respect to the tube member 1 in the front and back, left and right, and up and down directions. This positioning can be performed, for example, by filling the inside of the tube member 1 with stuffing such as chestnut stone, or by welding the pillar 19 to the tube member 1 via a connecting member.

When the grout 24 solidifies, the column 19 is fixed to the pipe member 1, and the base of the column 19 is thereby joined to the concrete foundation 23. After this, the same process as in a normal steel frame structure building is performed. , construction of steel beams between columns 19, etc. will be carried out.

According to this embodiment described above, the connecting pipes 2 that connect the pipe members 1 to each other are manufactured in advance at the factory and have precise predetermined dimensions, so that the mutual spacing between the pipe members 1 is accurate. As a result, each tube member 1 is reliably placed at the predetermined position where the pillar 19 should be erected, and the tube member 1
The concrete foundation 23 that uses this as a joint member with the pillar 19 will be finished with high precision.

In addition, the pipe member 1 and the connecting pipe 2 form the frame of the standing part 17 of the concrete foundation, and once the pipe members l are connected with each other with the connecting pipe 2, the assembly work of this frame is completed. Assembly work can be done without special skill and can be done in a short time, making the work easier and shortening the foundation construction period.

In the embodiment described above, the formwork holder 6 is provided on the connecting beam 2, so that the basic forming form 20 is connected to the connecting Q2 and made to stand upright. If it can stand upright without being connected, there is no need to provide the formwork holder 6 on the connecting wire 2.

Further, in the above embodiment, the formwork 20 was removed after solidification of the concrete slurry, but by using, for example, a concrete slab containing glass fiber as the formwork 20, the formwork can be left as it is even after the concrete slurry has solidified. The formwork may also be used as a surfacing material for the foundation. In this case, the formwork and the formwork holder of the connecting rod are connected with bolts or the like inside the formwork, so that the heads of the bolts or the like are not exposed to the outside surface of the formwork.

Further, in the embodiment described above, the pipe member 1 and the connecting pipe 2 are buried inside the upright part 17 of the concrete foundation 23, but they can also be made to reach the footing part 16. Further, the concrete foundation to which the method according to the present invention can be applied is the footing part 16 and the rising part 17.
The method of the present invention is not limited to foundations consisting of , but is also applicable to foundations consisting only of rising parts.

Further, in the above embodiment, concrete slurry is cast inside the foundation forming form 20, and after solidification of this slurry,
The lower part of the pillar 19 was inserted into the inside of the pipe member and the pillar 19 was fixed to the pipe member l with grout material 24, but
The order of these operations may be reversed.

〔Effect of the invention〕

According to the present invention, since the pipe members are connected to each other using connecting pipes that are produced in advance at a factory and have accurate length dimensions, the construction accuracy of the foundation is improved, and thereby the foundation and the building that is erected on this foundation. In addition, there is no need to arrange reinforcement reinforcing bars vertically and horizontally, and the work of creating a framework consisting of pipe members and connecting rods can be done more easily and in a shorter time than before. The foundation construction work becomes easier and the foundation construction period can be shortened.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the pipe member and the connecting pipe separated;
Figure 2 is a front sectional view showing the state after the foundation forming form is assembled, Figure 3 is a perspective view showing the state in which the lower part of the column is inserted into the pipe member after the concrete slurry solidifies, and Figure 4 is the pipe member. FIG. 3 is a side cross-sectional view showing a state in which the pillars and columns are combined with grout. DESCRIPTION OF SYMBOLS 1... Pipe member, 2... Connecting wire, 6... Formwork holder, 9... Height level adjustment bolt, I6... Footing part, 17... Standing part, 18... ... Discarded concrete, 19... Column, 20... Foundation forming formwork, 23...
・Concrete foundation, 24... grouting material.

Claims (1)

[Claims] (1) Pipe members are placed at predetermined positions for each of the pillars of the building to be erected, and these pipe members are connected using connecting wires manufactured in advance at a factory. Surrounding the katana with a foundation forming form and pouring concrete slurry inside it, inserting the lower part of the pillar into the pipe member, and fixing the pillar with grout filled in the pipe member. A building foundation construction method characterized by performing the following steps.