JPS58176397A - Segment and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a segment and a method for manufacturing the same, and more particularly to a segment used mainly for forming a large-diameter buried pipe such as a tunnel or a culvert.

BACKGROUND ART Conventionally, when constructing tunnels, culverts, etc., it has been common practice to use segments that are connected to each other so that the cross section becomes tubular as members that form the peripheral walls of the tunnels, culverts, and the like.

These segments generally include ductile segments, steel segments, resin concrete segments, etc., but all of these are heavy and 1. It has problems such as not being able to transport a large amount of material at once, and being difficult to move and adjust during on-site construction, as well as poor corrosion resistance.
It had the disadvantage of having some reliability problems during long-term use.

In view of the above, the present invention was made with the aim of providing a segment that is lightweight, has good workability, and is also excellent in corrosion resistance and water resistance, and a method for manufacturing the same. It consists of divided cylindrical pieces made of synthetic resin, and an edge body that is integrally erected along the peripheral edge of the divided cylindrical piece, and bolt insertion holes are bored in appropriate places in the edge body. After forming a pipe having a predetermined wall thickness and axial length by the filament winding method, the pipe is divided into two or three or more parts in the circumferential direction, and the end face of the peripheral edge of the divided pieces is Insert one piece of a connecting fitting with a cross-sectional shape, cover the area around the upright piece of the fitting and the vicinity of the edge of the split piece with a mold, and inject synthetic resin mixed with reinforcing fibers to form an edge. The gist of this paper is a method of manufacturing a segment characterized by the following.

Next, the present invention will be explained with reference to examples.

FIG. 1 is a perspective view of an embodiment of the invention, and FIG. 2 is a sectional view.

The segment 1 of the present invention is made of synthetic resin with a reinforcing body embedded therein, has a constant curvature R, and has divided cylindrical pieces 3 formed so as to be able to form a pipe wall by connecting in the circumferential direction. It also consists of an edge body 4 . It is composed of

In the above embodiments, glass fiber or chopped glass fiber is used as the reinforcing body, and if the location where the segment 1 is used is subject to large external pressure and the segment is required to have further strength, steel wire or steel plate may be used as the reinforcing body. used. Alternatively, as shown in an enlarged view in FIG. 3, the divided cylindrical pieces 3 can be formed by using the resin mortar layer 6 as an intermediate layer and forming synthetic resin layers 3B and 3B on both sides thereof, which are appropriately reinforced with reinforcing bodies. will be held.

Further, although the above embodiment shows a case in which the edges 4...4 extend in the direction of the inner surface of the curvature of the divided cylindrical pieces 3, the present invention is not limited to this, and they may extend in the direction of the outer surface of the curvature as shown in FIG. Alternatively, if necessary, the reinforcing lip 7 may be integrally formed as shown in FIG.

Next, a method for manufacturing segment 1 of the present invention will be explained.

First, as shown in FIG. 6, a tube 1 of a predetermined shape is formed from a fiber-reinforced synthetic resin by the filament winding method, and after hardening, the tube 11 is formed into, for example, IIA in the figure.
, IIA... It is divided into two or three or more pieces along the circumferential direction at the portion indicated by IIA, and each of the separated pieces 12 is provided with a connecting fitting having a cross-sectional shape of an angular shape on the peripheral end surface as shown in FIG. After inserting one side 13A of 43 and fixing it with adhesive, as shown in FIG. The edge body 15 is formed by injecting the synthetic resin 14 mixed with. Then, by removing the mold 14 after curing, the segment 1 shown in FIG. 1 is obtained.

In the above, the shape of the connecting fitting 13 may be a so-called L-shaped angle member, but from the viewpoint of ease of installation, the side that is inserted into the end face of the divided piece 12, as shown in FIG. 9A, is (13A) is preferably in the shape of an anchor bolt, and the upright piece (13B) is preferably in the form of a plate.Also, as shown in FIG. May be used.

Since the present invention is constructed as described above, the segments are lightweight because they are made of synthetic resin, can transport a large amount of material at once, and are easy to install.Furthermore, the synthetic resin is melt-resistant, It has excellent water resistance and has excellent long-term stability.Also, when manufacturing segments, after forming the tube body, it is divided and the necessary edges are attached. , there is no error when rejoining the segments, and rejoining can be performed reliably, and a large mold for molding the segments is not used at all, so manufacturing is easy and can be done at a very low cost, making it extremely economical. It has effects such as excellent sexual performance.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the invention, FIG. 2 is an i-plane view of the embodiment, FIG. 3 is an enlarged sectional view of another embodiment, and FIG. 4 is a sectional view of yet another embodiment. FIG. 5 is a perspective view of still another embodiment, FIGS. 6 to 8 are explanatory diagrams showing the manufacturing method of the present invention, and FIGS. 9A and B show other embodiments of the connecting fitting used in manufacturing. FIG.

Claims (5)

[Claims] (1) Consists of a split cylindrical piece made of synthetic resin in which a reinforcing body is embedded, and an edge body that is integrally erected along the peripheral edge of the split cylindrical piece, and the edge body has bolt insertion holes. A segment characterized by being formed by being perforated in a proper place. (2) The segment according to claim 1, wherein the reinforcing body is a glass fiber or a glass chopped fiber body. (3) The segment according to claim 1, wherein the reinforcing body is a steel fiber. (4) The segment according to claim 1, wherein the divided cylindrical pieces are formed by using resin mortar as an intermediate layer and providing fiber-reinforced synthetic resin layers on both sides. (5) After forming a pipe with a predetermined wall thickness and axial length by the filament winding method, the pipe is divided into two or three or more parts in the circumferential direction, and a cross-sectional shape is formed on the end face of the peripheral edge of the divided pieces. A segment characterized in that one piece of a connecting fitting is inserted, the periphery of the upright piece of the fitting and the vicinity of the edge of the divided piece is covered with a mold, and a synthetic resin mixed with reinforcing fibers is injected to form an edge body. manufacturing method.