JPH04228800A - Concrete segment - Google Patents

Abstract

PURPOSE:To obtain concrete segments which can be easily produced at a low cost and to secure the sufficient strength of the segments and combining strength among them. CONSTITUTION:Plural high rigid main steel frames 4 formed by uniting two main steel frames 2 provided in parallel at adjacent positions through connecting metal fittings which are provided at both the longitudinal ends of the steel frames 2 and mutually connect them are arrangedly provided inside a concrete segment as its reinforcing aggregate. The concrete segment can be easily and inexpensively produced by simple work for setting the existing high rigid main steel frame 4 integrally produced through the connecting metal fittings, and the main steel frame 4 gives sufficient strength to the concrete segment, and the connecting metal fittings 3 to form a part of the main steel frame 4 strengthen the connection of the concrete segment.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to concrete segments used for constructing shield tunnels and the like.

0002

[Prior art] Conventionally, this type of concrete segment was
It is generally known that a so-called reinforcing bar cage made of large-diameter main reinforcing bars, small-diameter reinforcing bars, etc. is used as reinforcing aggregate disposed inside.

0003

[Problems to be Solved by the Invention] However, with this conventional reinforced cage for concrete segments, the work of assembling a large number of reinforcing bars that make up the cage is extremely troublesome.
Because it is a combination of many reinforcing bars, it cannot be said to have high rigidity, and its reinforcing effect on concrete segments is not necessarily fully demonstrated.

[0004]Furthermore, since the joint fence that connects the concrete segments to each other is fixed to the above-mentioned reinforcing bar cage through anchor bars or the like, it cannot be said to be strong, and the concrete segments cannot be firmly connected to each other.

[0005] As described above, conventional concrete segments have problems in that the production work is troublesome and expensive, and the strength of the segments themselves and the strength of connections between the segments are not sufficient.

[0006] The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a concrete segment that can be manufactured easily and inexpensively, and that can also ensure sufficient strength of the segments themselves and their connections. Our goal is to provide the following.

[0007]

[Means for Solving the Problems] According to the concrete segment of the present invention, two main steel frames are installed adjacent to each other in parallel, and each main steel frame is connected to both longitudinal ends of each main steel frame. A plurality of high-rigidity main steel frames, which are made by integrating the two main steel frames into one by using the joint fittings provided in this manner, are arranged inside as reinforcing aggregates.

[0008] Concrete segments can be easily and inexpensively manufactured by simply setting an existing high-rigidity main steel frame that has been manufactured in one piece using this joint fitting. In addition, by reinforcing the strong high-rigidity main steel frame in pairs with joint fittings, the concrete segments have sufficient strength, and the joint metal fittings, which are part of the high-rigidity main steel frame, are used to connect the concrete segments. to ensure strong connections.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete segment of the present invention will be explained below with reference to the illustrated embodiments.

[0010] The concrete segment 1 (see Figs. 1 and 2) has two main steel frames 2, 2 installed parallel to each other in close proximity, and two main steel frames 2, 2 at both longitudinal ends of each main steel frame 2, 2. The two main steel frames 2, 2 are integrated into a single high-rigidity main steel frame 4 by means of a joint fitting 3 provided to connect the steel frames 2, 2. There are multiple locations in the area.

[0011]The high-rigidity main steel frame 4 in this embodiment is
Both main steel frames 2, 2 are formed of a long flat steel beam 5 with a plurality of lattice members 6 and have a substantially I-shaped cross section;
A joint fitting 5 is directly connected to the longitudinal end of the main steel frame 2 to connect and integrate both the main steel frames 2, 2. Note that the reference numeral 6 in FIG. 2 is a sheath tube for connection.

FIGS. 3 and 4 show another embodiment of the high-rigidity main steel frame 4 in the concrete segment 1 of the present invention.

[0013] The high-rigidity main steel frame 4 here has both main steel frames 2, 2 being I-shaped steel beams having a plurality of through holes 7 in the longitudinal direction of the web portion.

According to the concrete segment 1 of the present invention having such a configuration, concrete with sufficient strength can be produced by simply setting the existing high-rigidity main steel frame 4 into the formwork (not shown). Segment 1 can be easily manufactured.

Moreover, since the joint fitting 3 is provided as a part of the high-rigidity main steel frame 4, the concrete segment 1
The connections between the two can be reliably and firmly established.

[0016]

Effects of the Invention The concrete segment according to the present invention has a plurality of high-rigidity main steel frames, each of which is made up of two main steel frames connected by a joint fitting, arranged inside as reinforcing aggregate.

[0017] Therefore, concrete segments can be manufactured easily and inexpensively by simply setting the high-rigidity main steel frame inside the formwork. Furthermore, the high-rigidity main steel frame, which combines two main steel frames into one, ensures sufficient strength of the concrete segment. Furthermore, since the joint fittings are part of the high-rigidity main steel frame, the concrete segments can be firmly connected to each other.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial perspective view showing a concrete segment of the present invention.

FIG. 2 is an enlarged perspective view of section A in FIG. 1;

FIG. 3 is a schematic partial perspective view showing another embodiment of the high-rigidity main steel frame in the concrete segment of the present invention.

FIG. 4 is an enlarged perspective view of section B in FIG. 2;

[Explanation of symbols]

1... Concrete segment, 2... Main steel frame, 3... Joint fittings, 4... High rigidity main steel frame, 5... Flat steel beam, 6... Lattice material, 7
...Sheath tube, 8...Through hole.

Claims (1)

[Claims] Claim 1: Two main steel frames installed in parallel in close proximity to each other, and joint fittings provided at both longitudinal ends of each of the main steel frames to connect the main steel frames. A concrete segment characterized by a plurality of high-rigidity main steel frames, which are made by integrating two main steel frames, arranged inside as a reinforcing aggregate.