JPS6352153B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a cable-stayed bridge, a suspension bridge, a marine structure, an architectural structure, etc., in which the terminal end of a parallel cable or a cable with a large twist pitch is placed in a socket. This relates to a method of casting and fixing.

[Prior art]

Conventionally, as a method of casting the cable end into the socket, as disclosed in Japanese Patent Publication No. 58-39962, the wire at the end of the cable is cast into the socket.
The wires are arranged in a socket having a tapered hole so that the distance between the wires gradually increases from the front end (small diameter end) to the rear end (large diameter end) of the socket. The front part is filled with granular materials such as sand or fine steel balls in advance, and then zinc-copper alloy is injected into the rear part of the socket and cast.
After the zinc-copper alloy has cooled and solidified, the cast part is removed from the socket, the granules are removed from inside the socket, the cast part is fitted into the socket again, and then the front part inside the socket is removed. A known method is to inject epoxy resin into the mold.

However, this method requires complicated operations such as filling the particulate matter, extracting the cast part, removing the particulate matter, and inserting the part into the cast part. If the casting accuracy is poor and the number of wires increases,
There is a problem that the workability becomes very poor and a lot of labor is required.

[Purpose and structure of the invention]

The object of the present invention is to provide a method for fixing the end of a cable by casting it into a socket, which can advantageously solve the above-mentioned problems.
In the in-socket casting fixing method of the cable end, the zinc-copper alloy 3 is cast in the rear part of the socket 2, and the epoxy resin 4 is cast in the front part of the socket 2. A barrier layer 5 made of a wool material with a high melting point such as steel wool or glass wool is provided at an intermediate portion of the terminal inside the socket, and after the barrier layer 5 is fitted into the intermediate portion of the socket 2, This method of fixing a cable end by casting in a socket is characterized in that a zinc-copper alloy 3 is cast in the rear part of the socket 2, and an epoxy resin 4 is cast in the front part of the socket 2.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 4 show an embodiment of the present invention. First, as shown in FIGS. 1 and 2, a parallel wire cable or a cable 1 with a large twist pitch is inserted into a socket. In order to maintain the shape, tie iron wire 6 near the part where the
A wool material 13 with a high melting point such as steel wool or glass wool is inserted into the end of each wire 7 constituting the cable 1, and then a steel or synthetic resin pipe 8 with a length of about 200 mm is inserted. and then from an annular holding member 9, a number of hydraulic cylinders 10 fixed at intervals around the holding member 9, and an arc-shaped tightening piece 11 attached to the piston rod of the hydraulic cylinders 10. Naru pipe tightening machine 12
are arranged so as to surround each pipe 8 on the outer periphery, and each hydraulic cylinder 10 in the tightening machine 12 tightens each pipe 8 on the outer periphery via each tightening piece 11 to tighten the adjacent pipes 8 in all the pipes 8. The pipes 8 are brought into tight contact with each other, and each wire 7 is connected to a binding iron wire 6.
The wires 7 are sprayed from the tip to the end without twisting, and the ends of the wires 7 are held at a predetermined distance through the pipe 8, and the bending shape of each wire 7 is made into a predetermined shape by the bending rigidity of the pipe 8. Holds in shape.

Next, at the boundary between the part of the cable 1 where the zinc-copper alloy is to be cast and the part where the epoxy resin is to be cast, a wool material 13 with a high melting point such as steel wool or glass wool that has been inserted in advance is inserted between each wire 7 in a predetermined manner. The wool material 1 is filled in the position and also on the outer periphery of the cable at the boundary part.
3 to provide a barrier layer 5 with a thickness of 10 to 20 mm.

Next, as shown in FIG. 3, after gripping the wire end side of each pipe on the outer periphery with a pipe fixing clamp 15 consisting of a circular half band with a tightening bolt 14, the tightening machine 12 is removed. do.

Next, the socket 2, which has been inserted into the cable 1 in advance, is moved toward the pipe fixing clamp 15 and placed between the binding iron wire 6 and the pipe fixing clamp 15, as shown in FIG. barrier layer 5
After fitting the circumference of the socket into socket 2,
Zinc copper alloy 3 from the rear end into the socket 2
Then, after the zinc-copper alloy 3 has cooled and solidified, it is injected into the socket 2 from the front end inside the socket 2.
Epoxy resin 4 is injected into the front part of the socket 2, and after the epoxy resin 4 has solidified, the pipe fixing clamp 15 is removed, and each wire 7 protruding from the rear end of the socket 2 is cut and removed.

〔Effect of the invention〕

According to the present invention, a barrier layer 5 made of a wool material with a high melting point such as steel wool or glass wool is provided in advance at a portion of the terminal of the cable 1 that is located in the middle of the socket 2, and the barrier layer 5 is provided in the middle of the socket 2 at the end of the cable 1. After fitting into the socket 2, zinc-copper alloy 3 is cast into the rear part of the socket 2, and the socket 2 is fitted.
Since the epoxy resin 4 is cast in the front part of the interior, the particulate matter filling work that was performed in the conventional method,
Complicated operations such as casting part extraction work, particulate removal work, and casting part insertion work are no longer necessary, and the gap between the strands can be filled with zinc-copper alloy without any gaps. This makes it possible to cast and fix cable ends in sockets with high fatigue strength easily and with high efficiency.
Further, effects such as improved casting precision at the interface between the zinc-copper alloy and the epoxy resin can be obtained.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a perspective view showing the state in which the terminal of the cable has been shaped and a blocking layer has been provided, and FIG. 2 is a perspective view of the cable. A cross-sectional view of a portion of the barrier layer in
FIG. 3 is a perspective view showing the state in which the pipe fixing clamp is set, and FIG. 4 is a longitudinal sectional side view showing the state in which the zinc-copper alloy and epoxy resin are cast into the socket. In the figure, 1 is the cable, 2 is the socket, and 3 is the cable.
is a zinc-copper alloy, 4 is an epoxy resin, 5 is a barrier layer,
6 is iron wire for binding, 7 is wire, 8 is pipe, 10
is a hydraulic cylinder, 11 is a tightening piece, 12 is a tightening machine,
13 is a wool material, and 15 is a pipe fixing clamp.

Claims (1)

[Claims] 1 Place the end of the parallel cable or cable 1 with a large twist pitch in the socket 2, then cast the zinc-copper alloy 3 in the rear part of the socket 2, and cast the epoxy resin 4 in the front part of the socket 2. In the method of fixing the end of the cable by casting into the socket, a barrier layer 5 made of a wool material with a high melting point such as steel wool or glass wool is provided in advance at a portion of the end of the cable 1 located in the middle of the socket, and the barrier layer 5 is Inside the socket at the end of the cable, which is characterized in that after fitting into the middle part of the socket 2, a zinc-copper alloy 3 is cast into the rear part of the socket 2, and an epoxy resin 4 is cast into the front part of the socket 2. Casting fixing method.