JPH06185035A - Lining structure of water channel - Google Patents

Abstract

PURPOSE:To prevent a lining section from cracking and breaking caused by earth pressure and to prevent the lining section from being corroded by applying a laminated lining consisting of an outside resin plate, concrete and an inside resin plate to the circumference of a water channel. CONSTITUTION:With the excavation of a ditch 12 in the ground 11, a corrugated steel plate 13 is laid along the circumference of the ditch 12. After that, an outside resin plate 30 is formed in a U-shaped section after the pattern of the circumferential shape of a water channel 14. Then, an inside resin plate 40 is stored in the outside resin plate 30 through an intermediate insertion member. Successively, a gap section 50 is formed between both inside and outside resin plates 30 and 40, and they are connected to each other with a continuous bolt 60, etc. After that, while erecting a bar steel, concrete 80 is placed in the gap section 50. The inside of a lining constitutional body 20 is used as a renewed water channel 14. According to the constitution, the lining constitutional body 20 is coated with resin, so that corrosion is prevented, and cracks in the lining section can be prevented by elastic deformation of resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining structure of a water channel applied to, for example, an irrigation canal that has been used for a long period of time or a reclamation canal.

[0002]

2. Description of the Related Art Some irrigation and reclaimed waterways have corrugated steel plates laid along the inner peripheral surface of a trench excavated on the ground surface. Corrosion occurs in the steel sheet. At this time, if all the steel plates are replaced and a new water channel is to be formed, a great deal of labor is required and enormous cost is required.

Therefore, in recent years, a technique has been developed for forming a lining portion on the inner peripheral surface of an existing water channel to rehabilitate the water channel.

For example, in the lining structure shown in FIG. 8, an existing water channel (4) formed by arranging a corrugated steel plate (3) on the inner peripheral surface of a groove (2) dug in the ground surface (1) is formed. ), A concrete wall (5) is formed as a lining portion on its inner peripheral surface.

[0005]

However, in this lining structure, since the surface of the concrete wall (5) is exposed, if dust or the like adheres and accumulates on the exposed concrete surface, these deposits and accumulations will occur. There was a problem that hydrogen sulfide and sulfuric acid were generated by the action of microorganisms existing in the material, and the concrete was corroded by the oxidizing action.

Both side walls of the water channel (4) have earth pressure (P).
It is pushed in by and a tensile force is generated outside the corner of the concrete wall (5). This tensile force may cause cracks on the outside of the corners of the concrete wall (5), which may cause crack fracture.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art, to prevent crack breakage, and to provide a lining structure for a water channel having excellent corrosion resistance.

[0008]

In order to achieve the above object, in the lining structure for a water channel of the present invention, an outer resin plate is arranged along the inner peripheral surface of the water channel recessed in the ground surface, and While the inner resin plate is arranged on the inner peripheral surface side of the outer resin plate, the interposing member is interposed between the both resin plates,
A gap is formed between the resin plates, and concrete is poured into the gap.

[0009]

According to the waterway lining structure of the present invention, the outer resin plate is arranged along the inner circumferential surface of the waterway, and the inner side of the inner circumferential surface of the resin plate is inserted with the interposing member interposed. A resin plate is arranged and concrete is placed in the gap formed between the resin plates. As a result, the lining portion is covered with the resin plate having excellent corrosion resistance. Further, even if both sides of the lining portion are pushed inward by the earth pressure and a tensile force is generated outside the lining portion, the outer resin plate is elastically deformed, so that the tensile force acting on the concrete in the lining portion is increased. Will be alleviated.

[0010]

1 is a sectional view showing a lining structure for a water channel according to an embodiment of the present invention. As shown in the figure, this structure is formed by arranging a large number of the lining portion structural bodies (20) shown in FIG. 2 side by side along the existing water channel (14).

As a precaution, first, the existing water channel (14) will be explained. When the groove (12) is dug on the surface of the earth (11), the corrugation is formed along the inner peripheral surface of the groove (12). Steel plate (1
3) has been laid, thereby forming an existing waterway (14).

As shown in FIGS. 1 and 2, the lining portion structure (20) has an outer resin plate (30) and an inner resin plate (40). The outer resin plate (30) is formed to have a substantially U-shaped cross section following the inner peripheral shape of the water channel (14). Further, three inserts (31) are attached to the outer resin plate (30) on the bottom surface and both side surfaces of the inner periphery thereof by means of an adhesive. Each interposing member (31) is formed with a standing piece (33) protruding inward, and a plurality of bolt insertion holes (33a) is formed in each standing piece (33).

The inner resin plate (40) is connected to the outer resin plate (3).
The outer peripheral resin plate (30) is designed to have a size smaller than that of the outer resin plate (30) so as to be accommodated inside the outer resin plate (30). This inner resin plate (4
Inserts (41a) (41b) corresponding to the insert (31) are attached to both ends and the center of (0) via an adhesive. Each insert (41a) (41b),
The standing pieces (43) each having a U-shaped cross section and formed of both side pieces thereof are arranged so as to project outward. The interposer members (41a) located at both ends of the inner resin plate (40) are continuous from one side surface of the inner resin plate (40) through the bottom surface to the other side surface.
One of the upright pieces (43) has bolt insertion holes (43a) corresponding to the bolt insertion holes (33a).
And the bolt insertion holes (4
Corresponding to 3a), working holes (43b) are respectively formed in the upright pieces (43) on the other side. In addition, the interposer (41b) located in the center of the inner resin plate (40) is separated into both side surface portions and a bottom surface portion (not shown), and each of the upright pieces (43) has the bolt insertion hole. Bolt insertion holes (43a) are formed respectively corresponding to (33a).

The inner resin plate (40) thus constructed is housed inside the outer resin plate (30). At this time, as shown in FIG. 3, the standing piece (33) of the interposing material (31) on the outer resin plate (30) side is replaced by the interposing material (41a) (41b) on the inner resin plate (40) side. The standing piece (43) is locked to position the outer and inner resin plates (30) (40), and the tip of the standing piece (33) of the interposer (31) is attached to the inner resin plate ( 40) and the tip of the standing piece (43) of the interposer (41a) (41b) abuts on the inner peripheral surface of the outer resin plate (30), respectively, to form the outer and inner resin plates (30). A gap (50) is formed between (40). In addition, the bolt insertion hole (3
3a) is arranged so as to face the bolt insertion hole (43a) on the side of the insertion member (41a) (41b) corresponding to the insertion hole (33a).

In this state, a plurality of long bolts (6
0) is inserted into each of the bolt insertion holes (33a) (43a) through the work holes (43b) on either side of the work holes (43b) (43b) on both end sides, respectively, and The nuts (61) are fastened to the insertion front ends of the long bolts (60), respectively. In this way, the outer resin plate (30) and the inner resin plate (40) are connected to each other to form the lining portion structure (20).

A large number of such lining structure bodies (20) are arranged side by side along the existing water channel (14). At this time, as shown in FIG. 4, at the connecting portion of the lining portion structure (20) (20), the lining portion structure (2)
Internal resin plates (40) (40) facing each other between 0 (20)
The caulking material (70) is continuously interposed between the ends of the interposer, and the interposing material (41a) (4).
A packing (71) is continuously interposed between the interpositions 1a) along the interposition material (41a). Further, the U-shaped connecting member (72) is provided with the both side pieces (72a) (72a) of the interposing member (41a) (41a) on one side of the standing piece (43).
The bolts (73) are arranged so as to sandwich (43) at the same time, and in that state, the bolts (73) are provided on both sides (72a) (72a) of the U-shaped connecting member (72) and one side of the interposer (41a) (41a). The upright pieces (43) (43) and the packing (7
The nut (74) is fastened to the bolt (73) by penetrating each of them (1). Thereby, the connection between the lining portion structural bodies (20) (20) is achieved.

On the other hand, concrete (80) is cast into the gaps (50) of the lining structure (20). In this case, as shown in FIG.
0) was injected into the gap portion (50) by a predetermined amount, that is, when the height of the side wall portion of the lining portion structure (20) was H, the concrete (80) was injected to a height of H / 3. At that point, the injection is stopped once. Then, after inserting several steel bars (90) into the concrete (80) and standing them up, the injection of the concrete (80) is restarted to fill the gap (50) with the concrete (80). , Cure.

Further, with the concrete (80) being filled in this way, the upper end opening of the gap (50) is filled with the resin shown in FIG.
As shown in FIG. 5, the cover (51) is attached by a bolt (not shown) to close the upper end opening of the gap (50).

In the lining structure constructed as described above, needless to say, the inside of the lining portion structure (20) is used as a rehabilitation water channel.

As an example of the procedure for forming this lining structure, the lining section structure (20) is assembled in advance on the factory side, and then the lining section structure (20) is brought into the field and the lining section structure (20) is connected to the waterway ( 14)) and placing concrete (80). However, the forming procedure is not limited to this, and may be arranged in the water channel (14) while assembling the lining portion structure (20) on site, for example.

According to the lining structure of this embodiment, the outer resin plate (30) is arranged along the inner peripheral surface of the water channel (14), and the interposing material (3) is provided inside the resin plate (30).
1) The inner resin plate (40) is arranged with the (41) interposed, and concrete (80) is placed in the gap (50) between the outer and inner resin plates (30) (40). Therefore, since the surface of the lining portion structure (20) is made of the resin plates (30) and (40) having excellent corrosion resistance, the corrosion resistance is excellent. In this case, for example, the concrete (80) of the lining part structure (20) is the resin plate (30).
Protected by (40) so that it does not come into contact with deposits and stagnant substances,
Corrosion of concrete (80) can be effectively prevented.

Further, even if both side portions of the lining portion constituting body (20) are pushed inward by earth pressure and a tensile force is generated outside the corner portion of the lining portion constituting body (20), the outer side resin plate (30). By elastically deforming (1), the tensile force acting on the concrete (80) is relaxed, and the concrete (80) is prevented from cracking and crack fracture can be prevented.

As shown in FIG. 6, concrete (8
A plurality of long bolts (60) are arranged in the gap portion (50) in which the long bolts (6) are placed.
Since multiple steel bars (90) are arranged crossing 0),
The long bolts (60) and the steel bars (90) form a reinforcing bar structure, so that the concrete (80) can have high strength.

By the way, as shown in FIG. 7, in the connecting portion of the corrugated steel plates (13) forming the existing water channel (14),
The bolts (15) for connecting the steel plates are protruding inward,
The protruding portion of the bolt (15) is provided with the upright piece (43) of the interposing member (41a) in the lining portion structure (20).
If it is placed between (43), the lining part structure (2
0) can be placed in the waterway (14) without hindrance. Further, as shown in the figure, if a filling material such as sand (16) is filled between the lining portion structure (20) and the corrugated steel sheet (13), the formation of voids is prevented and the height becomes higher. The strength can be secured.

If a water seal packing that expands when it comes into contact with water is used as the packing (71) interposed between the lining structure (20), the water tightness between the lining structure (20) is improved. .

The interposer (31) used in the present invention
The shapes of (41a) and (41b) are not limited to those in the above embodiment. For example, a block-shaped interposer may be used, and any shape may be used as long as it can form a substantial gap between the outer resin plate (30) and the inner resin plate (40). Interposers may be used. Also, the means for fixing the insertion member to the resin plates (30) (40) is
The adhesive material is not limited to the adhesive as in the above embodiment, and the interposer may be fixed to the resin plates (30) and (40) using, for example, screws, screws, and bolts. Furthermore, the number of inserts used is not limited.

As the concrete used in the present invention, not only cement concrete but also resin concrete, asphalt concrete, etc., and concrete in a broad sense including mortar such as polymer mortar can be used.

[0028]

As described above, according to the lining structure for a water channel of the present invention, the outer resin plate is arranged along the inner peripheral surface of the water channel, and the interposing material is provided on the inner peripheral surface side of the resin plate. Since the inner resin plate is placed with the resin plate interposed and concrete is placed in the gap formed between both resin plates, the surface of the lining part is covered with a resin plate with excellent corrosion resistance. Excellent in corrosion resistance. In this case, for example, the concrete in the lining portion is protected by the resin plate, and concrete corrosion can be effectively prevented. Also, even if both sides of the lining portion are pushed inward by earth pressure and a tensile force is generated outside the lining portion, the elastic deformation of the outer resin plate reduces the tensile force acting on the concrete,
Cracks can be prevented from occurring without cracks in concrete.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a lining structure of a water channel which is an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a lining portion structure body applied to an embodiment.

FIG. 3 is a plan view showing a side wall portion of the lining portion structure.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a cross-sectional view showing a concrete pouring step in the lining structure of the example.

FIG. 6 is a perspective view showing a reinforcing bar structure of the lining structure of the embodiment.

FIG. 7 is a main part plan view showing a modified example of the waterway lining structure of the present invention.

FIG. 8 is a cutaway perspective view of a main part showing a conventional waterway lining structure.

[Explanation of symbols]

 14 ... Water channel 30 ... Outside resin plate 40 ... Inside resin plate 31, 41a, 41b ... Insertion material 50 ... Gap 80 ... Concrete

Claims (1)

[Claims] 1. An outer resin plate is arranged along the inner peripheral surface of a water channel recessed on the ground surface, and an inner resin plate is arranged on the inner peripheral surface side of the outer resin plate, while A lining structure for a water channel, characterized in that an interposing material is interposed between the resin plates to form a gap between the resin plates and concrete is poured into the gap.