JP3242618U - Thin cylindrical structure connecting curved resin concrete panels - Google Patents

Abstract

[Problem] To obtain a structure that is safe against internal water pressure and external pressure applied to a circular waterway tunnel and has excellent watertightness and durability, a curved resin concrete having a curved surface that matches the diameter of the circular waterway tunnel. To provide a thin cylindrical structure in which panels are connected with a high-strength adhesive. A thin cylindrical structure 10 formed by connecting a plurality of curved resin concrete panels 20 formed when reinforcing and repairing a waterway tunnel with a high-strength adhesive in a cylindrical shape, the waterway tunnel being reinforced and repaired. A thin cylindrical structure 10 characterized by comprising a plurality of curved resin concrete panels 20 having a predetermined radius of curvature matching the diameter of the curved resin concrete panel 20 and a joint material filling the gap between the curved resin concrete panels 20 and the curved resin concrete panels 20 bottom. [Selection drawing] Fig. 1

Description

The present invention relates to a thin cylindrical structure in which curved resin concrete panels having curved surfaces matching the diameter of a circular waterway tunnel are connected with a high-strength adhesive.

Plain concrete, reinforced concrete, steel materials, and the like have been generally used as materials for forming the lining of waterway tunnels. The strength of the material that forms the waterway tunnel lining is determined by material tests, etc. Based on the determined material strength, the tunnel lining wall thickness and ground support structure are designed. Furthermore, through stress analysis, the stress applied to the tunnel lining structure is calculated and designed so that the stress does not exceed the durability of the material. The strength of the waterway tunnel lining is not only the earth pressure and external water pressure from the outside such as the ground that the waterway tunnel receives, but also the internal water pressure caused by the head difference between the intake side and the discharge side of the water flowing inside the waterway tunnel and the flow rate. It will affect the design.

On the other hand, when reinforcing and repairing waterway tunnels, it is necessary to ensure that the waterway tunnel is safe against internal water pressure and external pressure, and that the structure has excellent watertightness and durability. . Specifically, assuming a waterway tunnel with a circular cross section, the waterway tunnel is designed to be safe against the internal water pressure and external pressure applied to the waterway tunnel, and to have a structure with excellent watertightness and durability. It is necessary to form "one cylindrical structure for reinforcement repair over 360 degrees of the inner wall of the tunnel" constructed on the inner wall. Based on the above idea, the applicants have made intensive research and have developed a thin cylindrical structure connecting curved resin concrete panels that can ensure the same level of strength as a thin steel pipe.

In Patent Document 1, "Earthquake resistance of an existing concrete structure that can obtain an earthquake resistant reinforcement structure that can clear structural calculations by using an improved resin concrete panel material without using structural materials such as H-shaped steel shoring. "Providing a reinforcement construction method." It is a composite resin concrete panel that is arranged and integrated into a curved or planar shape, and when installing the panel, at the panel connection part parallel to the axial direction of the inner surface of the structure, a predetermined It is also characterized by preliminarily pasting a connecting bidirectional carbon fiber sheet having an area capable of wrapping the entire area of the connecting portion by securing the wrap length to the place where the panel connecting portion on the inner surface of the structure is arranged. Seismic reinforcement method for existing concrete structures.” is disclosed.

JP 2014-163120 A

The seismic reinforcement construction method using the composite resin concrete panel material according to Patent Document 1 uses structural materials such as reinforcing bars and H-shaped steel shoring for the existing concrete structure whose inner surface is reinforced by this composite resin concrete panel. However, it is possible to obtain an earthquake-resistant reinforced structure that can clear the structural calculations. However, as can be seen from FIG. 1 of Patent Document 1, the background ground portion of the tunnel, which is an existing concrete structure, is not reinforced (unconstructed state).

The purpose of this invention is to create a curved surface that matches the diameter of the circular waterway tunnel, in order to obtain a structure that is safe against internal water pressure and external pressure applied to the circular waterway tunnel and has excellent watertightness and durability. To provide a thin cylindrical structure in which curved surface resin concrete panels are connected with a high-strength adhesive.

In order to solve the above-mentioned problems, the invention described in claim 1 is a thin-walled structure in which a plurality of curved resin concrete panels formed when reinforcing or repairing a waterway tunnel are connected in a cylindrical shape with a high-strength adhesive. A cylindrical structure that fills a joint gap between a plurality of curved resin concrete panels having a predetermined radius of curvature matching the inner wall diameter of a channel tunnel to be reinforced and repaired, and between the curved resin concrete panels and the curved resin concrete panels. It is characterized by being a thin cylindrical structure characterized by having a joint material that is filled and adhered as follows. In addition, in the present invention, the predetermined radius of curvature of the plurality of curved resin concrete panels is designed to be the same. That is, the cross-sectional shape of the thin cylindrical structure according to the present invention in the direction perpendicular to the ground surface is perfectly circular (perfectly circular or elliptical).

The device described in claim 2 is the device described in claim 1, wherein the main component of the joint material is that the tensile strength at the bonding surface between the curved resin concrete panel and the joint material is greater than the curved resin concrete. It is characterized by a thin cylindrical structure made of a high-strength adhesive having an adhesive strength greater than the tensile strength of the panel itself.

A thin cylindrical structure according to the present invention is a thin cylindrical structure in which a plurality of curved resin concrete panels formed when reinforcing and repairing a channel tunnel are cylindrically connected with a high-strength adhesive. Predetermined radius of curvature according to the diameter of the channel tunnel (having a circular cross-section) to be reinforced/repaired (the radius of curvature is determined by the diameter of the inner wall of the channel tunnel. The radius of curvature of the curved resin concrete panel is the same as that of the existing lining. a plurality of curved resin concrete panels having the same curvature), and a joint material that is filled and adhered so as to fill the joint gap between the curved resin concrete panels.

The main component of the joint material is a high-strength adhesive that has an adhesive strength such that the tensile strength at the bonding surface between the curved resin concrete panel and the joint material is greater than the tensile strength of the curved resin concrete panel itself. A plurality of curved resin concrete panels and a joint material (to connect them) are integrated into a large cylindrical body (with a ring-shaped cross section) (installed on the inner wall of the waterway tunnel). Therefore, in order to obtain a structure that is safe against the internal water pressure and external pressure applied to the water channel tunnel (having a ring-shaped cross section) and has excellent watertightness and durability, the existing lining diameter of the water channel tunnel It is now possible to provide a thin cylindrical structure in which curved resin concrete panels having matching curvature surfaces are connected with a high-strength adhesive.

1 is a cross-sectional view of a thin-walled cylindrical structure according to the present invention; FIG. FIG. 4 is a side view of a thin cylindrical structure; FIG. 4 is a development view for explaining a joined state of thin cylindrical structures;

<Structure of thin cylindrical structure>
An embodiment of the thin cylindrical structure 10 according to the present invention will be described in detail below with reference to FIGS. 1 to 3. FIG. FIG. 1 is a cross-sectional view of a curved resin concrete panel connecting thin cylindrical structure 10 according to the present invention. FIG. 2 is a side view of the thin cylindrical structure 10. FIG.

The thin cylindrical structure 10 is formed when reinforcing or repairing a channel tunnel. That is, it is formed by construction for the purpose of reinforcing and repairing the inner wall of a dilapidated waterway tunnel. As a specific process, the countersunk bolt is screwed into the metal expansion anchor embedded in the inner wall of the existing tunnel with the curved resin concrete panel 20 having a hole necessary for screwing in the countersunk bolt. The curved resin concrete panels 20 are temporarily installed so that a space is formed between them, and then the space between the existing tunnel and the curved resin concrete panels 20 is filled with a high-fluidity grout material. Further, a plurality of curved resin concrete panels 20 having a curvature surface that matches the curvature of the inner wall of the waterway tunnel and a high-strength adhesive that fills the joint gaps between the curved resin concrete panels 20 (a cylindrical connected in a cylindrical shape). Before the process of injecting and filling the high-fluidity grout material, the process of filling the joints with the high-strength adhesive is finished in units of the injection span.

The thin-walled cylindrical structure 10 is formed by the above process, and as shown in FIGS. A resin concrete panel 20 and a joint material 30 for filling a joint gap between the curved resin concrete panel 20 and the curved resin concrete panel 20 are provided. (This does not include the high-fluidity grout material filled in the gap between the existing tunnel lining surface and the curved resin concrete panel 20 on the back surface of the panel.) A major feature is that the curved resin concrete panel 20 and the joint material 30 are integrated in a ring shape (when the cross section is taken out) over 360° on the side (Fig. 1). As an overall shape, the thin cylindrical structure 10 is a cylinder (tube) formed by continuously extending a large ring formed by integrating a curved resin concrete panel 20 and a joint material 30 formed along the inner wall surface of the waterway tunnel in the direction of travel of the waterway tunnel. shape) structure (see Fig. 2).

In the thin cylindrical structure 10, the curved resin concrete panel 20 and the joint material 30 are integrated into a large ring shape (when the cross section is taken out) over 360 degrees on the inner wall side of the waterway tunnel whose cross section is circular. In order to do so, it is necessary to have sufficient adhesive strength (between the curved resin concrete panel 20 and the joint material 30). The main component of the joint material 30 (a plurality of curved resin concrete panels 20 having a predetermined curvature radius matching the diameter of the channel tunnel to be reinforced/repaired, and filling the joint gap between the curved resin concrete panels 20 and 20) is a high-strength adhesive having an adhesive strength (evaluated by tensile strength) such that the tensile strength at the bonding surface between the curved resin concrete panel 20 and the joint material 30 is greater than or equal to the tensile strength of the curved resin concrete panel 20 itself. is.

More specifically, the joint material 30 is an epoxy resin-based sealing material for wet surface construction. By adjusting the so-called hardener (a component necessary for hardening the epoxy resin), the epoxy resin-based sealing material increases the curing degree of the adhesive and improves the adhesive strength. In order to obtain a high-strength adhesive having an adhesive strength such that the tensile strength at the bonding surface between the curved resin concrete panel 20 and the joint material 30 is greater than the tensile strength of the curved resin concrete panel 20 itself, an epoxy resin-based adhesive is used. As a hardener, which is a necessary component for curing the sealing material, an amine-based hardener (alkylamine, allylamine, amidoamine, xylideneamine, etc.), which is an organic compound containing an amine group, an acid anhydride, and an epoxy resin are mixed. acid anhydride-based hardener, which is a type of hardener that hardens by using phenol; phenol-based hardener, which is an adhesive that uses phenolic resin as a hardener; A polyhydric alcohol-based hardener or the like can be employed. Only one type of these hardeners may be used, or one or more types of hardeners may be used in combination.

Furthermore, in order to obtain a high-strength adhesive having an adhesive strength such that the tensile strength at the bonding surface between the curved resin concrete panel 20 and the joint material 30 is greater than the tensile strength of the curved resin concrete panel 20 itself, In addition to the selection and adjustment of hardeners, fiber reinforced materials that can improve the strength of the adhesive by adding fibers to the epoxy resin, and fill the unevenness of the surface where the adhesive adheres, increasing the bonding area of the adhesive. Expandable fillers can also be added.

<Joined State of Thin Cylindrical Structure>
FIG. 3 is a developed view for explaining the joined state of the thin cylindrical structure 10. FIG. FIG. 3 is a diagram developed 360 degrees along the inner wall surface of the waterway tunnel (when viewed from the inside of the tunnel), and the joint gap between the curved resin control panel 20 and the curved resin control panel 20 is a joint material. 30 is ready for filling.

The joint state of the thin cylindrical structure 10 is, as shown in the developed view of FIG. 30 is filled and adhered. This structure is continuously formed from the start point of the repaired waterway tunnel to the end point of the repaired waterway tunnel. That is, the thin cylindrical structure 10 is continuously formed by the curved resin concrete panel 20 and the joint material 30 .

<Effect of thin cylindrical structure>
The thin cylindrical structure 10 according to the present invention is based on the cross-sectional area of reinforcing bars per unit tunnel axis converted as thin cylinders (rebars can be converted into thin cylinders) in the structural design calculation of a circular cross section in a waterway tunnel. Inspired. As a result of examination by the applicants, using the tensile strength at the bonding surface between the curved resin concrete panel 20 and the joint material 30 as a guideline, the adhesive strength that is greater than the tensile strength of the curved resin concrete panel 20 itself (for example, the tensile strength : 16.8 N/mm ² ). The thin cylindrical structure 10 is like a cylindrical (tube-shaped) structure in which a large ring formed by integrating a curved resin concrete panel 20 and a joint material 30 formed along the inner wall surface of a waterway tunnel is extended in the direction of travel of the waterway tunnel. image.

By forming a thin cylindrical structure 10 (with a tensile strength equal to or greater than that of the curved resin concrete panel 20) on the inner wall side of the waterway tunnel, the internal water pressure and the external pressure applied to the circular waterway tunnel A thin-walled curved resin concrete panel with a curved surface that matches the diameter of a circular waterway tunnel connected with a high-strength adhesive in order to obtain a structure that is safe against water, watertight, and durable. It is now possible to provide a cylindrical structure. Furthermore, the construction period can be shortened to 1/2 or less in comparison with the construction method similar to the thin-walled cylindrical structure.

<Example of modification of thin cylindrical structure>
The thin cylindrical structure according to the present invention is not limited to the aspects of the above-described embodiments, and the resin concrete panel, joint material, etc. may be used as necessary without departing from the spirit of the present invention. It can be changed as appropriate. It is also possible to devise (press at high temperature and high pressure) so that the inside of the base material of the curved resin concrete panel does not contain ultra-fine air bubbles.

The thin-walled cylindrical structure according to the present invention exhibits excellent effects as described above, so it is safe against the internal water pressure and external pressure applied to the circular channel tunnel, and has excellent watertightness and durability. It can be suitably used as a thin cylindrical structure in which curved surface resin concrete panels having a curved surface matching the diameter of the circular waterway tunnel are connected with a high-strength adhesive.

DESCRIPTION OF SYMBOLS 10... Thin cylindrical structure 20... Curved surface resin concrete panel 30... Joint material

Claims (2)

A thin cylindrical structure formed by cylindrically connecting a plurality of curved resin concrete panels formed when reinforcing or repairing a waterway tunnel with a high-strength adhesive,
a plurality of resin concrete panels having a predetermined radius of curvature matching the inner wall diameter of the channel tunnel to be reinforced/repaired;
A thin cylindrical structure, comprising: a joint material that is filled and adhered so as to fill a joint gap between the resin concrete panel and the curved resin concrete panel. The main component of the joint material is a high-strength adhesive having an adhesive strength such that the tensile strength at the bonding surface between the curved resin concrete panel and the joint material is greater than or equal to the tensile strength of the curved resin concrete panel itself. 2. The thin cylindrical structure according to claim 1, wherein:

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