JPH09132930A - Repairing method for existing water channel and repairing unit using therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the repairing work inside a water channel, to intensify the repairing strength, and also to restrain the reduction in the flow rate. SOLUTION: A repairing cylindrical body 1 forming a repairing unit A is assembled with a frame 2 and panels 3 so that the sectional shape thereof is slightly smaller than the cross-section of a water channel 30. On the other hand, reinforcing bars 60 are previously arranged in the appropriate positions around the repairing place of the channel 30. A repairing unit A is carried in a prescribed position inside the channel 30 by means of wheels 14 through rails 31, and is fixed inside the channel 30 by means of fixing bolts 22. The connecting frames 2d and the wheels 14 are removed, and the openings thereof are closed by plates. To the rear end receiving port of the repairing cylindrical body 1, the forefront end of the repairing unit A that is positioned thereafter is connected. Then, in the same manner, the repairing unit A is fixed, and a prescribed number of repairing units A are successively connected, and mortar is placed between the outside surface of the panels 3 of the repairing cylinder 1 and the inside surface of the water channel 30 so that the reinforcing bars 60 are embedded. After curing of mortar, the frame 2 and the fixing bolts 22 are removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of reinforcing or repairing an existing water channel and a repair unit used in the method.

[0002]

2. Description of the Related Art Waterway tunnels used for sewers, industrial water and agricultural waterways are deteriorated due to long-term use, and various kinds of water flowing into the tunnels in the waterways undergo chemical changes. the ₂ S) or the like, or cause deterioration in lining concrete layer, there may also be corroded to rebar further lining concrete layer.

In order to prevent such deterioration and deterioration of the water channel tunnel, JP-B-59-38553, JP-A-5-272167 and JP-A-3-247809.
Japanese Unexamined Patent Application Publication No. 2003-242242 discloses a technique for reinforcing or repairing a water tunnel (cave, culvert).

The technique described in Japanese Utility Model Publication No. 59-38553 (prior art) is such that a dome-shaped reinforcing plate formed corresponding to other inner wall surfaces except for a portion corresponding to the floor plate portion of the existing culvert is provided in the existing culvert. Then, the mortar is placed in the gap between the reinforcing plate and the existing culvert, and the reinforcing plate and the existing culvert are integrated.

The technique described in Japanese Patent Laid-Open No. 5-272167 (prior art) is such that a divided inner winding body is arranged in an existing box culvert, and a grout material is provided between the inner wall surface of the existing box culvert and the inner winding body. Is to be filled.

As shown in FIGS. 31 and 32, the technique described in Japanese Patent Application Laid-Open No. 3-247809 fixes a fixing member 102 to an inner surface of an existing water channel 100 with an anchor bolt 101, and the fixing member 102. After mounting the FRP plate 103 on the top with flat head screws 104, the existing water channel 1
00 and the FRP plate 103, cement milk 105 is placed.

[0007]

The prior art has the following drawbacks. (1) Since the reinforcing plate and the inner roll are heavy objects made of concrete or the like, it is difficult to carry them into the waterway tunnel. (2) Since the reinforcing plates are made of concrete, they must be made thicker, and they are carried into the waterway tunnel, and mortar is filled between the reinforcing plates and the inner surface of the waterway, which reduces the cross section of the waterway. This tends to cause a significant decrease in the flow rate in the waterways. (3) Since the inner surface is finished with concrete, it easily deteriorates again. (4) When filling the mortar, the reinforcing plate and the like may not be fixed in place because there is no method for preventing buoyancy and lateral movement. If it is not fixed at a fixed position, problems such as a strength problem and an increase in flow resistance occur.

On the other hand, in the prior art, the fixing members 102, F
Since the RP plate 103 is lighter in weight than the above-mentioned reinforcing plate, there are few problems in carrying in, and since the FRP plate has a small roughness coefficient, water easily flows, and the FRP plate 103 can be placed along the inner surface of the water channel. Since it is easy, there is an advantage that the cross section of the waterway is not significantly reduced. However, there are the following disadvantages. (1) Since a fixing member must be installed on the inner surface of the water channel, there is a limitation on fixing members and tools that can be brought into the water channel when running water is present in the water channel to be repaired. Further, when the amount of flowing water in the water channel increases rapidly, it takes time to take out these fixing members and the like. Furthermore, since each member is divided, it is difficult to perform an assembling operation in a water channel. (2) Since the FRP plate is butted against the fixing member installed on the inner surface of the water channel, a gap is created at the panel joint,
Lack of waterproofness. (3) Since the fixing member is arranged between the inner surface of the waterway and the FRP plate, when the cement milk is placed, the surroundings of the cement milk are bad, and the fixing member installed on the inner surface of the waterway places the cement milk. Since the fixing member is fixed together with the fixing member, the fixing member cannot be removed after the driving is completed, so that the fixing member cannot be reused.

Therefore, an object of the present invention is to simplify the reinforcement / repair work in the water channel, enhance the reinforcement / repair strength, and minimize the decrease in the flow rate due to the reinforcement / repair.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 relates to a repairing method, and comprises a repairing tubular body in a water channel having a cross-sectional shape slightly smaller than the cross-section of the waterway. The repair units are sequentially fed in the length direction of the water channel to be connected, and mortar (including concrete, the same applies to the claims below) is placed between the outer surface of the repair unit and the inner surface of the water channel. A method of repairing an existing canal for lining the inner surface of the canal, in which a reinforcing bar to be embedded in the casting mortar is provided in advance at a repair point on the inner surface of the canal, and the repair unit is sent into the canal with the reinforcing bar. The mortar was placed between the outer surface of the repair unit and the inner surface of the water channel with the reinforcing bar interposed.

As described above, when the reinforcing bar is provided in advance and the mortar is cast, the reinforcing and reinforcing mortar layer ensures the tensile and bending strengths of the mortar layer. The cross-sectional shape and the bar arrangement shape of the cylindrical body can be set appropriately. For this reason, it is preferable to set the cross-sectional shape and the reinforcing bar reinforcement shape of the repair cylinder in accordance with the required reinforcement ratio of the water channel (claim 10). In addition, since the reinforcing bar is relatively light, it is relatively easy to carry in and install in the waterway.

According to a second aspect of the invention, in the first aspect of the invention, the outer peripheral surface of the repair cylinder is formed by disposing a panel, and the panel is detachably supported by a frame disposed inside. In addition, a means for fixing this tubular body in the waterway is provided in the surroundings, and the fixing means fixes the repairing tubular body of the repair unit in the waterway, and after the mortar is set and cured. The frame of each repair cylinder is removed.

The repairing unit used in this repairing method is composed of a repairing cylinder having a cross-sectional shape along the inner surface of the water channel. The repairing cylinder is formed by arranging the outer peripheral surface of the panel, and the panel is formed. It may be detachably supported by a frame arranged inside, and a means for fixing the repairing cylinder in the water channel may be provided around the repairing cylinder (claim 3). .

The inner surface of the water channel after reinforcement / repair by this repair unit is formed by a panel, and the surface generally has a small roughness coefficient, so that the flow of water is smooth. In addition, the interval between the panel and the inner surface of the repair channel can be made as close as possible within a range in which the repair unit can move, and since the frame is also removed, a decrease in the cross section of the channel after repair can be suppressed as much as possible.

The repairing cylinder of the repairing unit has traveling wheels on the frame, and the wheels can be projected downward from the opening of the panel on the bottom surface of the repairing cylinder (claim). Item 5), in the case of this repair unit, the repair unit is sent into the water channel via the wheel, and after the repair unit is fixed in the water channel by the fixing means, the wheel is removed and the opening is closed, then ,
A method of placing mortar is adopted (Claim 4).

With this configuration, the repair unit can be easily fed into the water channel, and after the repair unit is fixed in the water channel, its wheels are removed and its opening is closed. The removed wheel is reused together with the frame. It is preferable that the wheels travel along a rail provided in the waterway, but the waterway surface may be rolled directly instead of on the rail.

The fixing means is a fixing bolt capable of projecting from the inner peripheral surface of the repair cylinder to the outer peripheral surface thereof, and the outer peripheral surface of the repair cylinder covers the protruding portion of the fixing bolt. Can be adopted (claim 7). In the case of this repair unit, the fixing bolt is operated from the inside of the repair cylinder, and the cylinder is fixed to the inside of the water channel by stretching it to fix the cylinder in the water channel. After fixing the mortar, the fixing bolt is removed. Is adopted (Claim 6). With this structure, the structure is simple and the repair cylinder can be easily fixed in the water channel. Even if the fixing bolt is removed, the mortar does not leak from the bolt hole due to the covering member.

Further, a receiving port formed of an outer peripheral surface panel is formed at one end of the repairing cylinder, and at the other end thereof.
It is also possible to adopt a configuration in which an insertion opening formed of an outer peripheral surface panel which is fitted in the receiving opening of another repair cylinder is also formed (claim 9). In the case of this repair unit, each repair cylinder is connected by fitting the insertion opening into the receiving opening (claim 8). With this configuration, the repair cylinders can be easily connected, and the repair cylinders can be connected without a gap, so that mortar does not leak and sufficient water-stopping property can be maintained.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of a repair unit will be described with reference to FIGS. 1 to 9. The repair unit A includes a repair cylinder 1 and a repair cylinder 1 as shown in FIGS. The wheel 14 is provided so as to project downward. The repair cylinder 1 includes a frame 2, a panel (main body) 3, an insertion panel (insertion) 4 attached to both ends of the panel main body 3, a receiving panel (receiving opening) 5, and joint materials 6a and 6b. It is composed by.

The panel body 3 is a press-formed product (FR
(P plate, FRPM plate, vinyl chloride plate, etc.) or vinyl chloride plate or the like is used, and the insertion panel 4, the receiving panel 5, and the joint materials 6a and 6b are pultrusion molded products (FRP products).
Alternatively, an extrusion molded product (FRP product) is used.

As shown in FIGS. 1 and 3, in the frame 2, the lower end of the side wall frame 2b is attached to both sides of the lower frame 2a with bolts 15, and both ends of the ceiling frame 2c are attached to the upper end of the side wall frame 2b. The parts are mounted by bolts 15 via the gusset plate 11 and assembled, and the shape of the frame 2 is formed so as to correspond to the inner surface shape of the water channel 30. 2 and 4
As shown in, the lower frame 2a is made of U-shaped steel, and the side wall frame 2b and the ceiling frame 2c are made of L-shaped steel.

As shown in FIGS. 1 and 3, a bottom plate central panel 3a and a bottom plate side panel 3b are attached to the lower surface of the lower frame 2a through a bottom plate joint material 6a. The inner surface of the bottom plate joint material 6a on the side of the lower frame 2a is formed in a bent shape corresponding to the shape of the lower frame 2a, and is provided with a protrusion 16. The protrusion 16 is fitted in the gap between the center panel 3a of the bottom plate and the side panel 3b of the bottom plate (see FIG. 16).

The lower frame 2a and the joint material 6a for the bottom plate
FIG. 5 shows a portion overlapping with the central panel 3a of the bottom plate with the interposition of
6 shows the bottom plate side panel 3b and its overlapping portion (see FIG. 16), and holes are provided in each of the overlapping portions, and the hole on the bottom plate central panel 3a side is shown in FIG. 5 (a). As shown in, the nut 24 with the collar 24c is fixed. Bolt 2 having a screw hole in this nut 24 with a collar
The lower frame 2a, the bottom plate central panel 3a, and the bottom plate joint material 6a are fixed by screwing 3 together.

As shown in FIG.
As shown in (a), a fixing bolt 22 that serves as a means for fixing the repair cylinder 1 to the inner surface of the water channel 30 is screwed. By tightening the fixing bolt 22, the length of the fixing bolt 22 is set so that the tip of the fixing bolt 22 comes into pressure contact with the inner surface of the water channel 30. The tip of the fixing bolt 22 has a rubber sheet 25 for preventing the cast mortar 37 from adhering.
Covered by This rubber sheet 25 is shown in FIG.
As shown in (a), it is attached to the inner surface side of the water channel of the nut 24 with the collar 24c.

The inner surface 26 of the hole of the central panel 3a of the bottom plate is
As shown in FIG. 5B, when the fixing bolt 22 is removed and the lower frame 2a is removed, the head of the flat head screw 20 screwed to the flanged nut 24 is housed. Keep it.

The mounting position of the fixing bolt 22 is as follows.
Appropriate locations around the repairing cylinder 1 are set appropriately in consideration of fixing strength and the like, and as shown in FIG. 7 at locations where there is no joint plate 6a for the bottom plate. At this time, as shown in FIG.
5 may be clamped and fixed by a nut 24 'having no collar. The figure (a) shows before mortar 37 is cast, and the figure (b) shows after mortar cast.

On the other hand, similarly, as shown in FIG. 6 (a), a flanged nut 24 is also fixed to the hole in the overlapping portion of the lower frame 2a and the bottom plate side panel 3b. The lower frame 2a, the bottom plate side panel 3b, and the bottom plate joint material 6a are fixed to the flanged nut 24 by screwing the bolts 21 together.

As shown in FIG. 6 (a), a cap 24a for preventing the inflow of the mortar 37, which has been similarly cast, is attached to the inner surface of the water channel 30 of the flanged nut 24. Further, as shown in FIG. As shown in c), there is provided a member 24b for preventing the mortar from coming off, which also serves as a rotation stop. Further, the hole inner surface 26 of the bottom plate side panel 3b is formed in a tapered shape similarly to the bottom plate central panel 3a. As shown in FIG. 6 (b), the bolt 21 is removed and the lower frame 2a is removed. When the nut with a collar 24
Make sure that the head of the flat head screw 20 that is screwed to is accommodated.

As shown in FIGS. 2 and 4, the lower frames 2a are provided in a pair on the insertion panel 4 side and the receiving panel 5 side of the panel body 3, respectively. A pair of connecting frames 2d for connecting the lower frames 2a are attached to each other by bolts 15 at a required interval. This connecting frame 2d
The above-mentioned wheel 14 is mounted between the two via a wheel mounting frame 18. The bottom plate side panel 3b facing the wheel 14 is provided with a wheel opening 13 (see FIG. 4). As shown in FIG. 1 and FIG. A part of is projected downward. In addition, as shown in FIG. 15, a closing plate 12 for closing the wheel opening 13 is separately prepared, and the wheel 1
After removing 4, the plate 12 is fitted into the opening 13 and screwed.

On the outer surface of the lower portion of the side wall frame 2b, a side wall panel 3c and a bottom plate side panel 3b are provided.
(See FIGS. 1 and 3). The side wall frame 2b, the side wall panel 3c, and the lower frame 2a.
Holes are provided in the overlapping portions of the bottom plate side panel 3b and the bottom corner joint material 6b, respectively.
As in the case of FIG. 5A, the flanged nut 24 is fixed to the hole of b. The fixing bolt 22 is screwed to the flanged nut 24 through a bolt 23 having a screw hole.

As shown in FIG. 3, the upper end of the side wall frame 2b is bent inward along the inner surface of the water channel 30. The upper corner panel 3d is bent and formed such that the inner surface of the upper corner panel 3d contacts the upper outer surface of the side wall frame 2b. A hole is provided in the overlapping portion of the side wall frame 2b, the lower end of the upper corner panel 3d, and the upper end of the side wall panel 3c, and the hole at the lower end of the upper corner panel 3d has a collar nut 24 as described above.
The fixing bolts 22 are screwed together via the bolts 23 having screw holes.

As shown in FIG. 1, a ceiling panel 3e is attached to the outer surface of the ceiling frame 2c. A hole is provided in the overlapping portion of the ceiling panel 3e, the upper corner panel 3d and the side wall frame 2b in the same manner as described above, and the hole in the upper corner panel 3d is formed in the same manner as described above. The fixing bolt 22 is screwed to the flanged nut 24 via the bolt 23 having a screw hole.

Passing holes 9 are provided at symmetrical positions on the insertion panel 4 side and the receiving panel 5 side of the upper corner panel 3d, and the side wall frame 2b located below the passing holes 9 is predetermined. A suspending member 8 is provided at the position (see FIGS. 1 and 3). A cap 10 for closing the passage hole 9 is separately prepared, and the passage hole 9 is closed with the cap 10 before the mortar is placed, as shown in FIG.

As shown in FIGS. 2 and 4, an insertion panel 4 and a receiving panel 5 are attached to both ends of the panel body 3, and the panels 4 and 5 are as shown in FIG. It is fastened to the panel body 3.

The outer surface of the edge of the insertion panel 4 of the repair unit A located at the rear is fitted to the inner surface of the edge of the receiving panel 5. Grooves 27 that face each other when fitted are provided on the outer surface of the edge of the insertion panel 4 and the inner surface of the edge of the receiving panel 5, respectively, and the O-ring 7 is attached between the grooves 27. (See Figure 4).

The panel body 3 and the frame 2 are fastened only with the structure shown in FIG. 8A. After the frame 2 is removed, the flat head screw 20 is screwed in as shown in FIG. 8B. In addition, each panel 3, 3a ...
It is needless to say that the fastening of the bolts 5, 5a ... to each other and to the frame 2 is performed at an appropriate position of the tubular body 1 in consideration of strength and the like (the bolts and the positions thereof are omitted as appropriate in each drawing). Exist).

The structure of the repair unit A is as described above. When the existing water channel 30 is reinforced and repaired, before the repair unit A is carried in, the reinforcing bar 60 is previously arranged on the repair inner surface of the water channel 30. As shown in FIG. 10, for example, the reinforcing bar 60 is provided at an appropriate position around the water channel 30, and the main bar 61 in the channel cross-sectional direction and the secondary bar 62 in the water channel cross each other and are fixed in a lattice shape. .

When the reinforcing bar 60 is attached to the ceiling surface of the water channel 30, as shown in FIG. 11, the main bar 61 is appropriately fixed by a bolt 73 and a holding metal fitting 72 fixed to an anchor 74 provided in advance on the inner surface of the water channel 30. The position is supported, or as shown in FIG. 12, it is supported and fixed in a floating state by a bolt 73 and a pressing metal fitting 72 via a mounting metal fitting 71.

When the reinforcing bar 60 is attached to the side wall surface of the water channel 30, as shown in FIG. 13, a bolt 73 and a pressing metal fitting 72 are used to support an appropriate portion of the secondary bar 62, or as shown in FIG. As described above, the bolts 73 and the pressing metal fittings 72 are supported and fixed in a floating state via the mounting metal fittings 71.

In this way, the reinforcing bar 60 is provided in the water channel 30. Next, an example of a method of reinforcing and repairing the inner surface of the water channel using the repair unit A will be described with reference to the above figures and FIGS. 15 to 17. explain.

(1) In order to remove laitance and weathered layer from the concrete layer in the existing water channel 30 to be repaired, surface polishing and high pressure water jet or air blow are used for cleaning and cleaning, and then mortar is removed. In order to secure the adhesive strength, primer coating is performed using an impregnating adhesive resin as a base treatment. Depending on the mortar, primer application can be omitted.

(2) As shown in FIG. 17, after carrying out the surface treatment of the inner surface of the existing water channel 30 or in parallel, a carry-in section 32 is opened in a part of the water channel 30 to be repaired, and this carry-in section 32 is provided.
The rail 31 is carried in from above and installed on the bottom surface of the water channel 30.

(3) Further, a reinforcing bar 60 is provided in the water channel 30 after the above repair work as shown in FIG.

(4) On the other hand, the cross-sectional shape of the above-mentioned repair cylinder 1 is set with the frame 2 and the panel body 3 so as to be slightly smaller than the cross-section of the water channel provided with the reinforcing bar 60, as shown in FIG. Then, the repair unit A is assembled on the assembly stand 38 outside the water channel.

(5) Side wall frame 2b of repair unit A
The hook of the crane is hooked on the hanging hole 8a of the hanging member 8 provided on the rail (see FIG. 4), and the insertion panel 4 side is placed on the rail 31 with the winch 33 facing the upper corner panel 3d. The passage hole 9 is closed by the cap 10. After that, as shown in FIG. 17, the winch 33 pulls the winch 33 to a predetermined position in the water channel.

(6) The repair unit A at the predetermined position is
As shown in FIG. 5, by tightening the bolt 22 screwed to the bolt 23 having a screw hole and pressing the tip end of the bolt 22 against the inner surface of the water channel, as shown in FIG.
The repair cylinder 1 is fixed in the water channel 30. After fixing, wheel 1
4 is removed together with the connecting frame 2d and the wheel mounting frame 18, and the wheel opening 13 of the bottom plate side panel 3b is closed by the closing plate 12.

(7) Similar to the above (4) to (5), the second repair unit A is pulled in before the first repair cylinder 1 fixed in the water channel 30, and the first repair unit A is repaired. A lubricant is applied to the inner surface of the socket panel 5 of the repair cylinder 1, and the outer surface of the edge of the insertion panel 4 of the repair cylinder 1 of the second repair unit A is received by the first repair cylinder 1. The panel 5 is fitted and connected to the inner surface of the edge of the panel 5. The repairing cylinder 1 of the second repairing unit A is fixed in the water channel 30 by tightening the bolts 22 as in (6) above.

(8) As in (7) above, the repairing cylinders 1 of the third and subsequent repairing units A are sequentially connected, and the number of repairing cylinders required for one mortar placing distance (1 span) is increased. Body 1
Are provided in the water channel 30.

(9) The repair cylinder 1 having one span is provided with the water channel 30.
After being provided inside, as shown in FIG. 17, an air bag 34 for preventing leakage of mortar is mounted between the panel of the repair cylinder 1 and the inner surface of the water channel 30. Thereafter, the mortar 37 is placed between the panel outer surface of the repairing cylinder 1 and the water channel 30 inner surface in order from the bottom. As a result, the reinforcing bar 60 is embedded at an appropriate position between the outer surface of the panel of the repairing cylinder 1 and the inner surface of the water channel 30. The mortar 37 is injected through holes 80 (see FIG. 20) described later
May be formed through the hole 80.

(10) After the required curing period of the mortar 37 is completed, the bolts 21, 22 and 23 are removed to remove the frame 2 and, as shown in each of FIGS. Replace with 20.

(11) After the work of one span is completed, the removed frame 2 and the bolts 21, 22 and 23 are used for assembling another repair unit A, and the work of the next span is carried out from the above (3) to By repeating the same procedure as (10), the inner surface of the water channel 30 is reinforced and repaired by a required length.

As the mortar 37 to be used, it is desirable to use Dencatascon manufactured by Denki Kagaku Kogyo Co., Ltd., which is excellent in fluidity and non-shrinkage and has a short curing time.

FIG. 15 thus reinforced or repaired
Since the inner surface of the water channel shown in (3) is formed of the panels 3, 3a ... Having a smaller roughness coefficient than that of the conventional one, that is, since it has slipperiness, water flows more easily than in the conventional one. For this reason, even if the cross-sectional area of the channel decreases, a flowable amount, that is, a required flow rate can be secured. The materials of the panels 3, 3a ... are appropriately set in consideration of corrosion resistance, acid resistance, wear resistance (hardness), etc., and the corrosion resistance and acid resistance are effective for H ₂ S etc. The property has the effect of reducing damage to foreign matter flowing in the confluence type water channel.

Further, when the rail 31 is installed, if the rail 31 is set to a desired inclination, the inclination of the repair unit A can be set by the rail 31, and the repair unit A is projected on the inner surface of the water channel 30 around it. Since the mortar 37 is placed in a fixed state by applying it, the repair unit A does not move due to the placement, and the repair unit A has the above-mentioned set gradient.
Can be fixed in the channel 30 to ensure the required gradient in the new channel.

Further, since the panels 3, 3a ... Can be replaced, damage to the inner surface of the water channel (reinforcing cylinder) after reinforcement can be repaired by replacing only the panel.

FIG. 18 shows a repair state according to another embodiment of the repair unit A. In this embodiment, in the repair cylinder 1 of the embodiment shown in FIG.
Side wall panel 3c and ceiling panel 3e, lower side wall panel 3c 'and upper side wall panel 3c', left and right ceiling panels 3
e ', 3e' are respectively divided, and the divided ends are connected by joint material 6a, flat head screw 20, etc. in the same manner as in FIG. This connection is made for each panel 3c ', 3
Alternatively, the ends of e ′ may be abutted against each other to eliminate the gap, and a flat plate-shaped joint material 6a ′ may be applied and screwed.

19 to 22 show another embodiment of the repair unit A. In this embodiment, the same parts as those in the above-described embodiments are designated by the same reference numerals, and mainly different parts are shown. The wheels 14 are embedded, the structure of the frame 2 and the mortar injection hole 80 are formed.

In the structure of the frame 2, a diagonal frame 2e is provided in a square shape for reinforcement. Each panel 3a, 3b,
The corners of the connection parts 3c, 3d, and 3e are shown in FIG.
As shown in (a), joint rubber 81 is attached with countersunk screws 82 and nuts 83 in order to stop water at the corners. In addition, as for the water stop at the corner, as shown in FIG.
A method of adhering or fitting a shaped molded article 81 'or injecting a sealing material can be adopted.

Mortar injection holes 80 are provided at appropriate positions on the four faces (top face, side faces, and bottom face) of the repair cylinder 1 (panel body 3).
Is provided, and a check valve (not shown) is provided in each of the holes 80 so that the mortar 37 does not eject.

The receptacle 5 includes receptacle panels 5a, 5b, 5c,
It is formed by fixing 5d and 5e to the panel body 3 with countersunk screws 20, and the edge of the panel body 3 is the insertion port 4.

The wheel 14 is located on the lower surface side of the repairing cylinder 1 as shown in FIG. 19, and is attached to the panels 3c and 3d and the L-shaped steel 2f inside thereof as shown in FIGS. It is attached via a seat 14a, a bolt 14b, a nut 14c, and a washer 14d. The mounting bolts 14b of the wheel 14 are removed after the mortar is cast, and an underwater bond is inserted into the screw hole (the wheel 14 and the like are left in the cast mortar 37).

Further, since the rail 31 and the like are laid on the bottom surface of the water channel 30, it is difficult to provide the reinforcing bar 60. Therefore, in this embodiment, the reinforcing bar 60 is provided on the lower surface of the repairing cylinder 1. To attach the reinforcing bar 60, bolts 73 shown in FIGS. 12 and 14 are projected from the panel 3 side in a fixed state, and the bars 61 and 62 are attached to the bolt 73 in the same manner as in the figure, and tightened by tightening nuts. In addition, the bottom of the water channel 30 is a circulation part, and is generally less damaged than other parts,
The reinforcing bar 60 may not be provided.

This embodiment is configured as described above, and the reinforcement / repair of the water channel 30 using the repair unit A is performed by the above-mentioned steps (1) to (10), but the injection of the mortar 37 is performed through the hole 80. After removing the bolts 21, 22, ..., etc., replace them with countersunk screws 20 or use underwater bonds. FIG. 26 shows an example of the set state of the repair unit A in the water channel 30, and FIG. 27 shows the state after the frame 2 is removed and mortar is placed. In addition, the suspension of the repair unit A by the crane C is performed by hooking the hook of the crane through the passage hole 9 to the frame 2d.

In each of the embodiments, a pair of frames 2 is provided in front and back, but a required number can be provided at equal intervals in the cylinder axis direction as shown in FIG. 23, for example. The point is that any structure can be used as long as the repairing cylinder 1 can be retained and can withstand the casting mortar 37.

Reinforcing bar 60 rebar shape (rebar diameter, pitch,
The bar arrangement method) is designed according to the required reinforcement ratio of the waterway 30,
Set to an appropriate shape. For example, if there is 30% deterioration in compression, tensile and bending strength of the waterway wall, the repair unit 1 and the reinforcing bar 60 need to be sufficient to compensate for the 30% deterioration, and its cross-sectional shape and Set the bar arrangement shape.

For example, both sides of the ceiling portion are required to have particularly high strength, and therefore, as shown in FIG.
Make heavy Further, as shown in FIG. 24 and FIG. 24, when the reinforcing bar 60 is bent downward in the ceiling portion, the stress due to the load applied from above hits at the center, and the allowable strength becomes high. 26 to 29 show the set state of the repair unit A in the water channel 30 and the placement of the mortar in the case of the reinforcement of this configuration.

When the branch pipe S is taken in as shown in FIG. 30, a hole is opened in the panel 3 and the connecting pipe 9 is inserted in this hole.
0 is inserted and fixed to the panel 3, and a seal 91 is performed. At this time, the panel 3 and the pipe 90 may be made of the same material.

Further, in each embodiment, even if the rail 31 is not used, the rail 31 is not necessarily installed when the wheels 14 can roll on the upper surface of the water channel 30.
Furthermore, even if the repairing cylinder 1 is not provided with the wheels 14, the cylinder 1 may be carried on a trolley. Further, the wheels 14 may be removed and the rails 31 may be slid. Instead of the winch 33, a thruster that pushes afterward may be adopted.

[0069]

As described above, according to the present invention, since the assembling work of the inner surface repair unit of the channel can be performed outside the channel, the operation in the channel can be simplified.

In addition, in the repairing method for the inner surface of the water channel, the panel of the repairing unit is used as a mold for mortar casting, the cross section of the repairing cylinder of the repairing unit is set in correspondence with the cross section of the water channel, and Since the frame is removed from the outside, the effective area of the waterway cross section after repair can be increased.

Further, since the repairing cylinder of the repairing unit is fixed in the water channel by the fixing means, the work of fixing the repairing cylinder in the water channel becomes easy. Also, after fixing the repair cylinder of the repair unit in the waterway, remove the wheel,
Since the frame and the fixing means can be removed after the mortar has been cast between the outer surface of the repairing cylinder and the inner surface of the waterway, it is effective for ensuring the effective cross-sectional area of the waterway after repairing, and the frame and the fixing means. You can reuse the wheels. This allows
It is possible to shorten the time for repairing waterways, improve workability, and reduce costs.

In addition, the receiving end of the repairing cylinder fixed in the water channel is fitted into the insertion opening of the repairing cylinder of the other repairing unit introduced behind the repairing cylinder. Therefore, the repair cylinders can be easily connected, and the waterproof property can be maintained by fitting the receiving port and the insertion port.

Also, the cast mortar layer (concrete layer)
Since the tensile strength and the bending strength of (1) are secured by the reinforcing bar, it is possible to easily cope with the shape and strength according to the required reinforcement ratio of the water channel, and the cost of reinforcement (repair) can be suppressed to the necessary minimum.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a repair unit.

FIG. 2 is a cross-sectional view of the same embodiment.

FIG. 3 is a front view of the same embodiment installed in a waterway.

FIG. 4 is a vertical sectional view of the same.

5A is a partially enlarged cross-sectional view showing a state in which a panel, a frame, and a joint material are fastened via bolts. FIG. 5B is a partially enlarged cross-sectional view after removing the frame.

6A is a partially enlarged cross-sectional view showing a state in which a panel, a frame, and a joint material are fastened. FIG. 6B is a partially enlarged cross-sectional view after the frame is removed. FIG. 6C is a cross section of the water channel side tip portion of the flanged nut. Plan

7 (a) and 7 (b) are partially enlarged cross-sectional views of a portion where there is no joint material.

FIG. 8A is a partially enlarged vertical sectional front view showing a state in which a panel is attached to a frame. FIG. 8B is a partially enlarged cross-sectional view after removing the frame.

FIG. 9 is an enlarged sectional view of a receiving port and an insertion port.

[Fig. 10] Schematic view of the arrangement of reinforcement in the waterway

FIG. 11 (a) is a partially enlarged vertical sectional front view showing a state in which a reinforcing bar is attached to an inner surface of a water channel. (B) is a partially enlarged vertical sectional left side view of the same. Figure

FIG. 12 (a) is a partially enlarged vertical sectional front view of another example showing a state in which a reinforcing bar is attached to the inner surface of a water channel (b) is a partially enlarged vertical sectional left side view (c) is partially enlarged Bottom view of essential parts

FIG. 13 is a partially enlarged vertical sectional front view showing a state in which a reinforcing bar is attached to a side wall panel.

FIG. 14 is a partially enlarged vertical sectional front view of another example showing a state where reinforcing bars are attached to the side wall panel.

FIG. 15 is a front view showing a repair cylinder in the water channel after the mortar is cast according to the same embodiment.

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

FIG. 17 is a schematic diagram showing a repairing method for the inner surface of the waterway.

FIG. 18 is a vertical sectional front view showing a repaired state according to another embodiment of the repair unit.

FIG. 19 is a front view showing another embodiment of the repair unit.

FIG. 20 is a vertical cross-sectional view of the same embodiment.

FIG. 21 is a partially enlarged cross-sectional view showing each example of a corner mounting state of the panel of the same embodiment.

22A and 22B show a wheel portion of the same embodiment, where FIG. 22A is an enlarged front view of a part thereof, and FIG.

FIG. 23 is a vertical sectional view showing another embodiment of the repair unit.

FIG. 24 is a diagram showing an example of a bar arrangement to a waterway.

FIG. 25 is a diagram showing an example of arranging a waterway.

FIG. 26 is a front view of the repair unit installed in the reinforcement channel of FIG. 24.

FIG. 27 is a front view after removing the frame and placing the mortar therein.

FIG. 28 is a front view of the repair unit installed in the reinforcing channel of FIG. 25.

FIG. 29 is a front view after removing the frame and placing the mortar in the same as above.

FIG. 30 is a cutaway front view of a main part of another embodiment in which a repair unit is installed in a waterway.

FIG. 31 is a partially cutaway perspective view showing a conventional waterway repairing method.

FIG. 32 is an enlarged sectional view of an essential part of the above.

[Explanation of symbols]

 A repair unit 1 repair cylinder 2, 2a, 2b, 2c, 2d, 2e frame 3, 3a, 3b, 3c, 3d, 3e panel (main body) 4 insertion opening (panel) 5 receiving opening (panel) 6a, 6b Joint material 8 Suspension member 13 Wheel opening 14 Wheel 22 Fixing bolt 30 Water channel 31 Rail 37 Mortar 60, 61, 62 Reinforcing bar 73 Reinforcing bar fixing bolt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasufumi Hayashi 1-12-19 Kitahori, Nishi-ku, Osaka City Kurimoto Iron Works Co., Ltd.

Claims (10)

[Claims] 1. A repair unit comprising a repairing cylinder having a cross-sectional shape slightly smaller than the cross section of the water channel is sequentially fed into the water channel in the length direction of the water channel to be connected to the outer surface of the repair unit. A method for repairing an existing canal in which mortar is placed between the inner surfaces of the canal to line the inner surface of the canal.Reinforcing bars to be embedded in the cast mortar are provided in advance at the repair points on the inner surface of the canal. A method for repairing an existing water channel, characterized in that the above-mentioned repair unit is fed into a water channel provided with a mortar, and mortar is placed between the outer surface of the repair unit and the inner surface of the water channel by interposing the reinforcing bar. 2. The repair cylinder has an outer peripheral surface formed by arranging a panel, the panel being detachably supported by a frame arranged inside, and the cylinder being fixed to the periphery in a water channel. And fixing means for fixing the repairing cylinder of the repairing unit in the water channel by the fixing means, after the mortar has been set and cured, the frame of each repairing cylinder is removed. The method for repairing an existing waterway according to claim 1. 3. The repair unit used in the method for repairing an existing water channel according to claim 2, comprising a repair cylinder having a sectional shape along the inner surface of the water channel, the repair cylinder having an outer peripheral surface. Formed by arranging the panels,
The panel is detachably supported by a frame arranged inside, and a means for fixing the tubular body in the waterway is provided around the repairing tubular body. Repair unit. 4. The repair cylinder has traveling wheels on the frame, and the wheels project downward from an opening of a panel on the bottom surface of the repair cylinder. After sending the repair unit into the waterway, after fixing the repair unit in the waterway by the fixing means,
The method for repairing an existing water channel according to claim 2, wherein the wheel is removed, the opening is closed, and then mortar is placed. 5. The repair unit according to claim 3, which is used for repairing an existing water channel according to claim 4, wherein a traveling wheel of the repair cylinder is attached to the frame, and the wheel is a repair cylinder. An existing waterway repair unit characterized in that it projects downward from an opening in a panel on the bottom of the body. 6. The fixing means is a fixing bolt capable of protruding from the inner peripheral surface of the repair cylinder to the outer peripheral surface, and the outer peripheral surface of the repair cylinder covers a portion where the fixing bolt protrudes. A member is provided, and the fixing bolt is operated from the inside of the repair cylinder, and the cylinder is fixed in the water channel by stretching it on the inner surface of the waterway, and after the mortar has been cured, remove the fixing bolt. 5. The method for repairing an existing water channel according to claim 2 or 4. 7. The repair unit according to claim 3 or 5, which is used for repairing an existing water channel according to any one of claims 2, 4, and 6, wherein the fixing means is a repair cylinder. Is a fixing bolt capable of protruding from the inner peripheral surface to the outer peripheral surface, and the outer peripheral surface of the repair cylinder is provided with a covering member for covering a portion where the fixing bolt protrudes. unit. 8. The repair cylinder has a receiving port formed of an outer peripheral surface panel at one end, and the other end has the same outer circumference fitted into the receiving port of another repairing cylinder. 7. An insertion opening formed of a face panel is formed, and each repairing cylinder is connected by fitting the insertion opening into the receiving opening. The existing canal repair method described in. 9. The method for repairing an existing water channel according to any one of claims 2, 4, 6, and 8, wherein the method is used for repairing the existing water channel.
The repair unit according to any one of the above items, wherein a receiving port formed of an outer peripheral surface panel is formed at one end of the repairing cylinder, and the receiving end of another repairing cylinder is provided at the other end. A repair unit for an existing water channel, which is formed with an insertion opening that is also formed of an outer peripheral panel that fits in the mouth. 10. The cross-sectional shape of the repair cylinder and the reinforcing bar reinforcement shape are set according to the required reinforcement ratio of the water channel. The existing waterway repair method described in any one of 1.