JP7362069B2 - Buried type concrete foundation - Google Patents

Description

The present invention relates to a concrete foundation of the type in which the concrete foundation frame is buried.

When installing signal equipment boxes at railroad crossings, etc., it is necessary to construct a concrete foundation beneath the ground. In this case, it is conceivable to easily fabricate it using an existing prefabricated foundation manufactured in advance at a factory, but especially in cold regions (snowy regions), problems such as cracks due to long years of snow pressure or slope of the foundation itself, etc. There were concerns about the durability of the foundation.
Therefore, as in the past, a wooden formwork was assembled at the construction site, and the formwork was then filled with concrete to construct a concrete foundation.

However, when constructing a concrete foundation on-site, it takes a long time to harden the fresh concrete and to install and remove the wooden formwork, which is a factor that lengthens the construction period. Furthermore, construction of concrete foundations on site required a high level of skill, and there was also the issue of continuing quality control into the future.

Japanese Patent Application Publication No. 05-179657

Thus, the present invention was devised to solve the above-mentioned conventional problems, and because it does not involve constructing a concrete foundation on-site using wood formwork, it does not require much time for hardening of fresh concrete, installation of wood formwork, etc. It does not take a long time to remove it, does not prolong the construction period, does not require advanced construction skills, maintains quality well into the future, and can be constructed with only simple assembly on site. The purpose of this invention is to provide a concrete foundation with a buried concrete foundation frame.

The present invention
A foundation for an instrument box having a cubic shape and having a space opening upward and downward at approximately the center,
A substantially L-shaped outer frame block and an inner frame block made of concrete members, an outer formwork and an inner formwork each connected to each other to form a rectangular frame shape, and the outer formwork and the inner formwork. a concrete filling part provided between the concrete filling part, a foundation bolt mounting member fixed to the concrete filling part, and a foundation bolt mounting member that protrudes from the top surface of the foundation and fixes an instrument box installed on the foundation. a foundation bolt;
The outer formwork, the inner formwork, and the concrete filled in the concrete filling part are integrated to form a foundation for the instrument box.
It is characterized by
or
When connecting the outer frame blocks to form a rectangular frame-shaped outer form, a connecting tool having a slip prevention function is used at the connecting portion of the outer frame blocks, and a rectangular frame is formed by connecting the inner frame blocks. For forming the inner frame of the shape, a connecting tool having a slip-preventing function is used at the connection part of the inner frame block,
It is characterized by
or
The outer formwork and the inner formwork are configured to be stackable in multiple stages.
It is characterized by
or
A cable entrance and a cable storage opening are provided between the outer formwork and the inner formwork;
It is characterized by this.

With the concrete foundation of the present invention, which does not require construction of a concrete foundation using wood formwork on site, it takes a long time to harden the fresh concrete and install and remove the wood formwork. It has the excellent effect of not requiring a long construction period, requiring no advanced construction skills, maintaining quality in the future, and being able to be constructed with only simple assembly on site.

FIG. 1 is a configuration explanatory diagram illustrating the configuration of the present invention. FIG. 1 is an explanatory diagram illustrating an outline of a foundation for an instrument box manufactured according to the present invention. It is explanatory drawing (1) explaining the structure of an outer frame block. FIG. 2 is an explanatory diagram (2) illustrating the configuration of an outer frame block. FIG. 2 is an explanatory diagram (1) illustrating the configuration of an inner frame block. FIG. 2 is an explanatory diagram (2) illustrating the configuration of an inner frame block. It is a side view of an outer formwork. It is a side view of an inner formwork. FIG. 2 is a configuration explanatory diagram illustrating the configuration of an aperture block. FIG. 2 is a configuration explanatory diagram illustrating the configuration of an installation guide base. FIG. 2 is an explanatory diagram illustrating a state in which the outer formwork and the inner formwork are assembled and the foundation bolt fixtures and connectors are attached. It is explanatory drawing (1) explaining the structure of a foundation bolt attachment. It is explanatory drawing (2) explaining the structure of a foundation bolt fixture.

Embodiments of the present invention will be described below based on the drawings.
Generally, the foundation for an instrument box has a cubic shape, for example, a rectangular parallelepiped shape, and approximately half or more of the foundation is buried underground. A space portion that opens upward and downward is provided approximately at the center.

Usually, the foundation for the instrument box is formed of a concrete member. That is, conventionally, a formwork for forming a foundation, that is, an outer formwork and an inner formwork made of wood, for example, is assembled at a construction site, and concrete is poured into the assembled formwork.

However, the present invention employs the following configuration shown in the drawings.
Here, in FIGS. 3 and 4, reference numeral 1 indicates a substantially L-shaped outer frame block formed of a concrete member. The outer frame block 1 is manufactured in advance at a factory. Next, in FIGS. 5 and 6, reference numeral 2 indicates an inner frame block. This inner frame block 2 is also manufactured in advance at the factory.

Here, as shown in FIG. 11, the outer frame block 1 is framed into a rectangular shape, and connected by the connectors 3 to form an outer frame 4 having a rectangular frame shape. The outer frame block 1 is formed into a substantially L shape, and the lengths from the base 6, which is the joint of the L shape, are not the same. One side is long. This allows a rectangular frame to be formed.

Further, this outer formwork 4 is installed, for example, on the side of a railroad track, and the construction site beside the railroad track is excavated to a predetermined depth, and the outer formwork 4 is installed at the excavated construction site. Since this is the foundation for an equipment box that stores railway-related cables and other equipment, it is necessary to bury about half of the foundation to ensure levelness and stability.

By the way, an installation guide base 8 shown in FIG. 10 is installed in advance at the excavated location. The outer formwork 4 and the inner formwork 5 are installed using this installation guide base 8 as a guide. As shown in FIG.

Next, the inner frame block 2 is framed into a rectangular frame shape at a predetermined interval inside the outer formwork 4 installed at a predetermined position of the construction site, and connected with the connecting tool 3 to form the inner formwork 5. Configure.

Then, the outer form frame 4 is further framed and stacked on the outer form frame 4 formed by framing into a rectangular frame shape as described above. Moreover, the inner formwork 5 is further framed and stacked on the inner formwork 5.

Incidentally, if the outer frame block 1 or the inner frame block 2 is manufactured to have a height twice as high as that shown in the figure, there is no need to stack them at the construction site. However, if the product is twice the height, it will be larger and heavier, making it extremely difficult to transport it to the construction site. Therefore, we decided to create a split type structure and stack them up at the construction site.

As shown in FIGS. 1 and 11, H-beam steel is used as the connecting tool 3 in the connecting portion 13 in the transverse direction, which is framed in the shape of a rectangular frame. Therefore, the lower concave portion of the H-shaped steel is fitted into the connecting portion 13 of the lower outer frame block 1. This allows the outer frame block 1 to be connected and to prevent it from shifting back and forth. Note that since the H-shaped steel has a thick web, it is necessary to lower the upper surface of the connecting portion 13 by cutting the web by that thickness.

Then, the connecting portion 13 of the outer frame block 1 to be stacked is fitted into the upper recess of the H-shaped steel. This makes it possible to connect the stacked outer frame blocks 1 and to prevent them from shifting back and forth.

For the longitudinal connecting portion 14 framed in the shape of a rectangular frame, H-shaped steel may be used as the connecting tool 3, or a U-shaped connecting tool 3 may be used. When using an H-shaped steel, the lower recess of the H-shaped steel is fitted into the connecting portion 14 of the lower outer frame block 1. This allows the outer frame block 1 to be connected and to prevent it from shifting back and forth. Incidentally, since the H-shaped steel has a thick web, it is necessary to lower the upper surface of the connecting portion 14 by cutting the web by that thickness.

Note that the sizes of the outer frame 4 and the inner frame 5 can be changed to form a rectangular frame with a larger size. In that case, flat length adjustment blocks are added between the outer frame blocks 1 and the inner frame blocks 2 to be connected.
In that case, the connecting portion between the outer frame block 1 to be stacked and the length adjustment block is fitted into the upper recess of the H-shaped steel.

Next, a foundation bolt fixture 9 shown in FIGS. 12 and 13 is attached to a gap between the outer formwork 4 and the inner formwork 5, which are framed in a rectangular shape, for example, a gap that occurs in the width direction. A foundation bolt 10 is attached to the foundation bolt fixture 9 in advance.
The foundation bolt fixture 9 is arranged so that the tip of the foundation bolt 10 projects from the upper surface of the foundation.

As shown in FIG. 1, a foundation bolt guide stay 11 for holding the tip of the foundation bolt 10 is installed on the upper surface of the assembled foundation frame. As a result, the installation position of the foundation bolt 10 does not move even when concrete is poured into the gap created between the outer formwork 1 and the inner formwork 2 and filled with vibration.

In the above process, concrete is poured between the outer formwork 4 and the inner formwork 5, and is hardened after curing for a predetermined period of time. In the present invention, there is no need to remove the outer formwork 4 and the inner formwork 5 after solidification. Both the outer formwork 4 and the inner formwork 5 become integrated with the poured concrete, and constitute the foundation for the instrument box.

As described above, in the present invention, the outer frame block 1 and the inner frame block 2 having the same external shape as the concrete foundation are prepared in advance from concrete members. That is, a concrete outer frame block 1 and an inner frame block 2 having a substantially L-shaped outer shape and a predetermined width are prepared in advance at a factory, and then assembled and stacked on site.

That is, at the site, a substantially L-shaped concrete outer frame block 1 and an inner frame block 2 are used to frame a rectangular outer formwork 4 and an inner formwork 5 to form a frame body. Furthermore, the outer formwork 4 and the inner formwork 5 are piled up to produce a foundation frame.

The number of stacking stages can be two or more, and the number of stages can be changed as desired. This is in response to cases where the foundation must be buried deeper due to site conditions.

Fresh concrete is poured between the assembled outer formwork 4 and inner formwork 5 to integrate the foundation frame and the poured concrete.
The structure of the foundation frame takes into account the cable entrance and cable storage, that is, the structure has an opening that communicates the space of the foundation provided inside the inner formwork 5 with the outside. Improves construction efficiency.

That is, the structure is such that an opening block 12 is attached to secure a cable entrance, and a cable reservoir is provided between the outer frame block 1 and the inner frame block 2.

As mentioned above, the structure has a simple assembly process for the foundation frame. That is, it is possible to complete the foundation frame by assembling and stacking L-shaped blocks, that is, the outer frame block 1 and the inner frame block 2.

Furthermore, by installing the foundation bolt fixture 9 and the foundation bolt guide stay 11, the foundation bolt 10 can be positioned easily and reliably.

Furthermore, the assembled foundation frames such as the outer frame block 1 and inner frame block 2 made of concrete members can be used as a foundation as they are, making it unnecessary to dispose of industrial waste generated during foundation production. In other words, the assembled foundation frame is a buried type of residual formwork, and does not generate industrial waste unlike the production of wooden frames.

1 Outer frame block
2 Inner frame block 3 Connector 4 Outer form 5 Inner form 6 Base 8 Installation guide base 9 Foundation bolt fixture 10 Foundation bolt 11 Foundation bolt guide stay 12 Opening block 13 Short direction connection 14 Longitudinal connection

Claims (4)

A foundation for an instrument box having a cubic shape and having a space opening upward and downward at approximately the center,
A substantially L-shaped outer frame block and an inner frame block made of concrete members, an outer formwork and an inner formwork each connected to each other to form a rectangular frame shape, and the outer formwork and the inner formwork. a concrete filling part provided between the concrete filling part, a foundation bolt mounting member fixed to the concrete filling part, and a foundation bolt mounting member that protrudes from the top surface of the foundation and fixes an instrument box installed on the foundation. a foundation bolt;
The outer formwork, the inner formwork, and the concrete filled in the concrete filling part are integrated to form a foundation for the instrument box.
This is a fill-in type concrete foundation that is characterized by:
When connecting the outer frame blocks to form a rectangular frame-shaped outer form, a connecting tool having a slip prevention function is used at the connecting portion of the outer frame blocks, and a rectangular frame is formed by connecting the inner frame blocks. For forming the inner frame of the shape, a connecting tool having a slip-preventing function is used at the connection part of the inner frame block,
The fill-in type concrete foundation according to claim 1, characterized in that:
The outer formwork and the inner formwork are configured to be stackable in multiple stages.
The fill-in type concrete foundation according to claim 1 or claim 2, characterized in that:
A cable entrance and a cable storage opening are provided between the outer formwork and the inner formwork;
The fill-in type concrete foundation according to claim 1, claim 2, or claim 3, characterized in that:

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