JPH06248892A - Tunnel liner molded integrally with seal material and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve construction efficiency when a centrifugally molded tunnel liner is formed by providing a seal material integral with concrete on a surface in contact with an adjacent liner. CONSTITUTION:A string-like endless seal material 3 which is integral with concrete and protrude from the surface of concrete is embedded in a surface 2 of a tunnel liner 1 in contact with an adjacent liner. And a head 4 of the material 3 is projected from the surface 2 and a leg 5 thereof is embedded in the concrete. And when the liner 1 is coupled with an adjacent liner 1a, the seal materials 3, 3a are closely contacted with each other so that the gap therebetween is completely sealed. As a result, a watertight joint surface can be formed surely and easily and no adhesive is required when the tunnel liner is assembled, thereby eliminating the need for bonding of seal material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete tunnel liner integrally molded with a sealing material, which is used in a shield construction method and a propulsion construction method, and a manufacturing method thereof.

[0002]

2. Description of the Related Art A tunnel liner manufactured by centrifugal molding has excellent characteristics such as a dense concrete, high strength, high dimensional accuracy, smooth surface, and rich watertightness. .. In order to further complete such characteristics, it is necessary to improve the watertightness of the contact surface where the tunnel liner contacts the adjacent liner.

Conventionally, a structure has been adopted in which a seal packing is sandwiched between the adjacent contact surfaces of such a tunnel liner and the seal packing is crimped. Such seal packing is often adhered to the concrete surface with an adhesive or the like, but the tunnel liner use site is often wet,
Adhesion becomes uncertain, and it takes a lot of time,
Reliable construction was not easy.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the problems of the conventional tunnel liner, and utilizes the characteristic that the centrifugal molding concrete is extremely solid. Then, it is intended to provide a tunnel liner in which a sealing material is embedded in a concrete and integrated.

[0005]

In order to achieve the above object, the present invention provides a tunnel liner integrally formed with a sealing material. The sealing material of this tunnel liner is a continuous sealing material that seals the inner surface and the outer surface of the liner, and is continuously embedded by making one round around the contact surface with the adjacent liner around the liner, and is integrated with the concrete. It has become. That is, the present invention is a tunnel liner integrally formed with a sealing material, characterized in that a protruding sealing material integral with concrete is provided on a contact surface of the tunnel liner with an adjacent liner.

The tunnel liner integrally formed with the sealing material can be manufactured by the following method. First,
A string-shaped endless sealing material made of a flexible material and having a leg whose cross section is embedded in concrete and a head portion protruding from the concrete is manufactured in advance. The sealing material is fitted and fixed in a groove formed on the inner surface of the peripheral form of the centrifugally formed tunnel liner with the leg facing the casting concrete side. Concrete is poured into this form and the tunnel liner is centrifugally molded. At this time, the legs of the sealing material are integrally embedded and fixed in the concrete. If the tunnel liner is cured and then removed from the mold, the sealing material comes off the mold together with the concrete, and the tunnel liner of the present invention integrally molded can be manufactured.

[0007]

Since the tunnel liner of the present invention has the embedded sealing material embedded in the contact surface with the adjacent liner, the watertight joint surface can be surely formed easily. In addition, no adhesive is required when assembling the tunnel liner, which can save the labor of sticking the sealing material.

Since this liner is centrifugally molded, air does not remain in the concrete, and the sealing material is fixed in complete contact with the concrete. As the sealing material, a gasket type material such as chloroprene or EPDM (ethylene propylene dienomethylene rubber) may be used. A water-expandable type sealing material is not preferable because it expands by the mixing water of concrete when pouring concrete. Since the gasket type seal material is a band type, it is easy to install and has excellent durability and economy.

In the liner of the present invention, the circumferential joint and the ring-to-ring joint are provided with the seal material integrated with the concrete, so that the water-stopping effect is high and the excellent watertightness can be secured.

[0010]

FIG. 1 is a cross-sectional view of a sealing material embedded portion of a tunnel liner according to an embodiment of the present invention. The tunnel liner 1 is integrated with concrete on the contact end face 2 with the adjacent liner,
A continuous sealing material 3 protruding from the concrete surface is embedded. The sealing material 3 has a head 4 and a concrete end surface 2
Projecting from, the legs 5 are integrally embedded in the concrete. Therefore, when combined with the adjacent liner 1a, the sealing materials come into close contact with each other and completely seal the gap.

At this time, there is no need to wind the sealing material around the periphery of the concrete or to adhere it to the concrete surface. Further, even under a moist environment, defective sealing due to defective adhesion does not occur. This sealing material can be accurately positioned by pressing the head 4 of the sealing material into the groove provided in the mold before placing the concrete on the liner 1, and when the mold is released from the concrete, Easily separated from the formwork as a unit.

[0012]

EFFECTS OF THE INVENTION The tunnel liner in which the sealing material of the present invention is integrated solves all the conventional sealing material construction work, incomplete sealing property, poor adhesion and the like, and exhibits excellent sealing property.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a seal material embedded portion of a tunnel liner according to an embodiment of the present invention.

[Explanation of symbols]

 1 Tunnel liner 2 End face 3 Sealant 4 Head 5 Leg

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor's collection Minoru 2-10-9 Izumi, Suginami-ku

Claims (2)

[Claims] 1. A tunnel liner integrally formed with a sealing material, wherein a projection sealing material integral with concrete is provided on a contact surface of the tunnel liner with an adjacent liner. 2. A string-shaped endless sealing material made of a flexible material and having a leg whose cross section is embedded in concrete and a head protruding from the concrete is provided on the concrete side where the leg is placed. To that end, it is fitted and fixed in the groove provided in the peripheral formwork inner surface of the centrifugal forming tunnel liner, and concrete is placed in the formwork to centrifugally form the tunnel liner,
A method of manufacturing a tunnel liner integrally molded with a sealing material, characterized in that the legs of the sealing material are integrally embedded and fixed in a concrete.