JPH04265315A - Junction structure of block structure for foundation - Google Patents

Abstract

PURPOSE:To save the labor of the execution of the branched section of the foundation made of precast concrete of a residence, etc. CONSTITUTION:Screw sections are mounted at the end sections of reinforcing bars 3, 4 extended at a right angle from the connecting end faces 1a of two oppositely arranged first block structures 1. These reinforcing bars 3 are screwed mutually to both ends of a tubular metal fitting 5, an internal surface of which is formed in a tapped hole 5a. The reinforcing bar 4 extended at a right angle from the connecting end face 2a of a second block structure 2 joined at a right angle with the first block structures 1 is passed through a through-hole 5b formed at the central section of the connecting metal fitting 5, and clamped by a nut 6. The joining sections of the first and second block structures 1, 2 are surrounded by forms 7, and concrete is placed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to the joint structure of precast concrete block structures that are formed in advance in a factory or the like and installed at a construction site to serve as the foundation of a house, etc. This invention relates to a joint structure of a foundation block structure at a T-shaped joint of parts.

0002

[Prior Art] As is well known, the foundation of a house is generally formed by pouring concrete on-site, and therefore construction involves cutting roots into the ground and crushing stones to the bottom of the roots. Formation of land by laying and compacting, etc., erection of formwork, arrangement of reinforcing bars, pouring of concrete, dismantling of formwork, backfilling, and leveling of the top with mortar shall be carried out in sequence. It is done by.

[0003] Therefore, in the foundation construction procedure as described above, the work is diverse and requires a large number of man-hours, so it is difficult to reduce the construction period and construction cost. Requires workers. Therefore,
In recent years, in order to save labor on site for prefabricated houses, etc., a method has been used to construct the foundations for houses, etc. as precast concrete foundation building block structures that are formed in advance at factories etc. A situation has arisen.

[0004] In the foundation construction block structure, for example, a foundation footing section placed on the foundation and a rising section provided on this foundation footin section and on which an upper structure such as a house is placed are constructed in advance. It is integrally formed in a factory or the like. This block structure has a shape in which a conventional cast-in-place fabric foundation is divided perpendicularly to its longitudinal direction. Further, the foundation is constructed by providing a ground work in the same way as when constructing a foundation by pouring it on site, and pouring concrete onto the ground work.

[0005] When such block structures are joined together with adjacent block structures, for example,
The reinforcing bars extending from the joint end faces of the block structures were joined by welding, etc., and concrete was poured between the block structures. In addition, in foundations made of block structures, in order to save labor by eliminating the work of connecting reinforcing bars, joint hardware with bolt insertion holes is provided on the joint end surfaces of the block structures, and the block structures are connected together with bolts. Some have a configuration in which they are connected by fastening.

[0006] Conventionally, at a T-shaped joint in a branching part of a foundation, a T-shaped block structure in plan view is installed, and the three joint end faces of this T-shaped block structure are Each linear block structure was joined together.

[0007]

[Problems to be Solved by the Invention] By the way, joining of block structures is labor-intensive even in the above-mentioned method of joining reinforcing bars or using joint metal fittings. For example, in the method of joining reinforcing bars, welding of reinforcing bars,
Processes such as building formwork at joints and pouring concrete are required. In addition, with the method using joint hardware, the block structures are heavy and cannot be easily moved once placed on the base, so the position of the block structures to be connected may shift even slightly in the vertical or horizontal directions. If this happens, the position of the insertion hole of the joint hardware will shift, making it difficult to join the block structures.

[0008] When the T-shaped block structure is used, one branch requires joining at three locations, making the construction of the branch complicated and time-consuming. The present invention has been made in view of the above circumstances, and its purpose is to provide a block structure for a foundation that can perform the work of joining branch parts of a foundation made of block structures by one-time joining. The purpose of this invention is to provide a joint structure for this purpose.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides two first block structures whose connecting end faces are arranged to face each other, and a space between these first block structures. A second block structure arranged with its connecting end face facing, and a threaded portion extending from the respective connecting end faces passing through the first and second block structures in the longitudinal direction thereof. The reinforced reinforcing bars are screwed together with the ends of the opposing reinforcing bars of the first block structure, and the connecting hardware is penetrated by the reinforcing bars of the second block structure, and the reinforcing bars are driven into the T-shaped joint. and a cast-in-place concrete layer, and the connecting hardware is formed into a tubular shape, and the inner surface thereof is a threaded hole for screwing into the reinforcing bar of the first block structure, and The structure is characterized in that a through hole is provided in the center of the block structure, through which the reinforcing bars of the second block structure pass.

0010

According to the above structure, first, when the first block structures are placed facing each other on the base, the reinforcing bars extending from the joint end faces are screwed together from both ends of the joint metal fittings. Next, the second block structure is placed at a position facing between the first block structures while passing the reinforcing bars through the through holes of the joint metal fittings. Then, a formwork is erected to surround the T-shaped joint where these reinforcing bars are joined, and concrete is poured into this formwork to form a concrete layer.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 5 are drawings showing one embodiment of the present invention, and show a joint structure of foundation construction block structures at a T-shaped joint of a branching portion of a foundation.

[0012] The joining structure of the block structures includes two first block structures 1, 1 arranged with their connection end surfaces 1a facing each other, and a connection end surface between these first block structures 1, 1. 2a facing the second block structure 2, and the first and second block structures 1 and 2 are penetrated in the longitudinal direction and extend from the respective connection end surfaces 1a and 2a, and the end The reinforcing bars 3, 4 having threaded parts 3a, 4a are screwed together with the ends of the reinforcing bars 3, 3 of the opposing first block structures 1, 1, respectively, and the second block structure 2, and a cast-in-place concrete layer C placed at the T-shaped joint (Fig. 4).
(Only the rising part of the foundation is shown)

[0013] The first and second block structures 1 and 2
is similar to the conventional block structure, and is made of precast concrete formed in a factory or the like with reinforcing bars arranged inside.

[0014]The first and second block structures 1
, 2, as shown in FIG. 4, the footing part a and the rising part b of the foundation are integrally molded, and the connecting end surface 1
From a, 2a, three reinforcing bars 3, 4 extend vertically in a row from the center of the width of the connecting end surfaces 1a, 2a, penetrating the block structure and extending in the longitudinal direction thereof. Threaded portions 3a, 4a are provided at the ends of these reinforcing bars 3, 4. The first block structure 1 and the second block structure 2 are formed into similar shapes.

[0015] As shown in FIG.
It is formed into a tubular shape and has a screw hole 5a on the inside of the tube. This screw hole 5a is formed so as to be screwed into the threaded portions 3a, 3a at the ends of the reinforcing bars 3, 3. The screw holes 5a are threaded in opposite directions at the center of the connecting hardware 5, and by turning the connecting hardware 5 in the same direction, the reinforcing bars 3, 3 can be screwed together from both ends at the same time. It looks like this. Furthermore, two through holes 5b, 5b are provided at the center of the lengthwise direction of the connecting hardware 5 at right angles to the lengthwise direction. These through holes 5b, 5b
are formed at right angles to each other.

[0016] At the T-shaped joint of the branching part of the foundation, the first block structures 1, 1 are arranged opposite to each other.
Three reinforcing bars 3, 3 are screwed and connected from both ends of the metal joint 5 (only one set is shown in FIG. 1, etc.). Then, with the reinforcing bars 4 passing through the through holes of these connecting hardware 5, the second block structure 4 is perpendicular to the first block structures 1, and the first block structure 1 , 1, with the connecting end surface 2a facing between them. Then, a nut 6 is screwed from the end of the reinforcing bar 4 of the second block structure 2 via the washer 6a, and the reinforcing bar 4
is fastened to the connecting hardware 5.

As shown in FIGS. 1 and 2, these reinforcing bars 3 and 4 and joining metal fittings 5 are built to surround the T-shaped joint of the first and second block structures 1 and 2. It is covered with a concrete layer C formed by a molded formwork 7.

When constructing a branch part of the foundation using the joint structure of the foundation block structure of this embodiment, first,
As in the past, a root hole is made, a ground is formed at the bottom of the hole, and mortar is placed on top of the ground to form the foundation. Then, the first block structures 1, 1 are arranged facing each other. At this time, the joint end surface 1a of the first block structures 1, 1
, 1a are screwed to both ends of the joint hardware 5. By rotating the joining hardware 5, the reinforcing bars 3 of the first block structure 1,
The three parties are concluded.

Next, the second block structure 2 is placed so that the joint end surface 2a faces between the first block structures 1,1. When installing the second block structure, the reinforcing bars 4 extending from the joint end surface 2a of the second block structure 2 are penetrated through the through holes 5b of the joint hardware 5. At this time, the reinforcing bars 3 of the first block structure 1,
Although the through hole 5b of the metal joint 5 joining the metal parts 3 to 3 does not necessarily face in the horizontal direction, the metal joint 5 has
Since two through-holes 5b, 5b are provided, the through-holes 5b can be opened by simply rotating the joint metal fitting 5 within a range of less than 45 degrees.
can be made horizontal.

Next, the first and second block structures 1,
2 is installed, formwork 7 is erected to surround the T-shaped joint. Then, concrete is poured into the formwork 7. Next, when the concrete has hardened, the formwork 7 is removed and construction of the branched portion of the foundation is completed.

According to the joining structure of the foundation block structures as described above, there is no need to join the block structures at three points at the branching part of the foundation as in the conventional example.
Branched parts of the foundation can be constructed by joining at one location, saving labor in foundation construction.

[0022] Furthermore, the joining metal fitting 5 has two through holes 5b.
, 5b are provided, the reinforcing bars 4 of the second block structure 2 can be fastened to the joint hardware 5 without unnecessarily tightening or loosening the joint hardware 5.

[0023]

Effects of the Invention As described above in detail, according to the joint structure of the foundation block structure of the present invention, the joint structure of the foundation block structure according to the present invention has three
There is no need to join block structures at certain points, and branched parts of the foundation can be constructed by joining three block structures at one point, which saves labor in foundation construction. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of the joint structure of the foundation block structure of the above embodiment, showing the state before concrete is poured.

FIG. 2 is a plan view of the main parts of the joint structure of the foundation block structure before concrete is poured.

FIG. 3 is a partially cutaway plan view showing the joining hardware of the joining structure of the foundation block structure.

FIG. 4 is a plan view of a main part showing a rising part of the joint structure of the foundation block structure.

FIG. 5 is an end view showing a block structure of the joint structure of the foundation block structure.

[Explanation of symbols]

1 First block structure 1a Connection end surface 2 Second block structure 2a Connection end surface 3 Reinforcing bars 4 Reinforcing bars 5 Connecting hardware 5a Screw hole 5b Through hole C Concrete layer C

Claims (1)

[Claims] Claim 1: In a foundation block structure that is placed on a foundation and serves as a foundation for supporting an upper structure such as a house, the T of the block structure at a branching part of the foundation is
A joint structure of a letter-shaped joint, comprising two first block structures arranged with their connecting end faces facing each other, and a first block structure arranged with their connecting end faces facing between these first block structures. A second block structure, a reinforcing bar that passes through the first and second block structures in the longitudinal direction and extends from the respective connection end faces and has a threaded portion at the end, and a first opposing The connecting metal fittings are respectively screwed to the ends of the reinforcing bars of the block structure and penetrated by the reinforcing bars of the second block structure, and a cast-in-place concrete layer is cast in the T-shaped joint. The connecting hardware is formed into a tubular shape, and has a threaded hole on its inner surface to be screwed into the reinforcing bar of the first block structure, and has a second block structure in its longitudinal center. A joint structure for a foundation block structure, characterized by having a through hole through which a reinforcing bar passes.