JPH0452317A - anchor device - Google Patents

Abstract

PURPOSE:To prevent the forming of rust in an anchor device as a whole by using a carbon fiber rod for a tension member of the anchor device composed of iron-made parts for civil engineering works, and ceramics for a spacer, ring, bearing plate, and anchor head respectively. CONSTITUTION:A carbon fiber rod, which carbon fiber is pulled in order in a length direction to be convergently formed in a given rod shape, is adopted for a tension member 1. Also ceramics of zirconia and silicon nitride, etc., is used for a spacer 2, ring 3, bearing plate 4, and anchor head 5. This prevents the forming of rust, and the lowering of durability and original heating force in long time use.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an anchor device used in civil engineering work that is used for a long time.

[Problems to be solved by conventional technology and invention]

All metal parts of conventional anchors are made of iron, so they are prone to rust after long-term use (they have the disadvantage of gradually corroding and reducing fire resistance and original earth retention capacity).

The present invention solves this drawback and proposes an anchor device that is permanently rust-free.

[Means to solve the problem]

The present invention will now be described in detail with reference to the accompanying drawings.

A PC steel stranded wire is used as the tensile material 1, and approximately half of the buried distal end side is fixed to the anchor body a using an iron spacer 2 and an iron ring 3, and approximately half of the proximal end is tightened to form an iron bearing plate 4.
In the anchor fixed by a steel anchor head 5, a carbon fiber rod is used as the tensile member 1, and a spacer 2 is used.
This relates to an anchor device characterized in that a ring 3, a bearing plate 4, and an anchor head 5 are made of ceramics.

[For production]

Since neither the carbon fiber rod nor the ceramics will rust permanently, the anchor device as a whole is rust-free.

Since it has excellent tensile strength, the earth retaining power of the invention is even more excellent.

〔Example〕

The carbon fiber rod shown in the drawings is made by aligning carbon fibers in the length direction and forming them into a predetermined rod shape.

The ceramics used include zirconia and silicon nitride.

In the figure, numeral 7 is a poling hole, 8 is a grout hose that is often used with a polyethylene vibrator, and is left as it is after cement milk is injected, 9 is a cement milk hardening part, 10 is a concrete plate, and 11 is a tension member 1 attached to the anchor head. 5, a suitable fastening means such as a wedge mechanism, 12, a filling part for filling the cavity or cement milk after tensioning the tensile material 1, and 13, a filling part for filling the cement milk in the cement milk hardening part 9 into the cavity I2. The packer 13', made of cloth or the like, is a sheath made of a polyethylene vibrator or the like, which is tilted on its side, to prevent cement milk from entering the cavity 12 before the tensile material 1 is tensioned.

[Effects of the Invention] As mentioned above, the present invention replaces all conventional iron parts with durable rust-proof carbon fiber rods and ceramics, resulting in a permanently rust-free anchor, and uses carbon fiber rods as a tensile material to create an earth retaining structure. It has excellent strength and demonstrates excellent practicality as a new anchor device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are sectional views of the anchor device. a... Anchor body, 1... Tensile material, 2... Spacer 3... Ring, 4... Bearing body, 5... Anchor head.

Claims (1)

[Claims] A prestressed steel stranded wire is used as a tensile material, and approximately half of the buried distal end is fixed to the anchor body using an iron spacer and an iron ring, and approximately half of the proximal end is tightened to connect an iron bearing plate and an iron anchor head. An anchor device that uses a carbon fiber rod as a tensile material and uses ceramics as a spacer, a ring, a bearing plate, and an anchor head.