JPH0410268Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a joining structure for lining plates that cover waterways and are used for repairing waterway tunnels in hydroelectric power generation facilities and the like.

``Conventional technology'' Hydroelectric power generation, which uses river water to rotate a generator's turbine to generate electricity, requires no fuel costs and is clean and free from pollution compared to thermal or nuclear power generation. It is a powerful power generation method and has advantages such as low operating costs.

Among the above-mentioned hydroelectric power generation facilities, water tunnel (introduced water pipe) type hydroelectric power generation facilities are facilities in which the dam location, penstock, and generator are constructed at a separate location due to location conditions, and are more expensive than facilities directly under the dam. It has the advantage of being able to take advantage of the terrain.

FIG. 8 shows an example of the structure of this type of water tunnel type hydroelectric power generation facility. In this hydroelectric power generation facility, water from a reservoir 2 created in a dam 1 is guided from a water intake 3 of the dam 1 to a waterway tunnel 4 and stored in a surge tank 5, and from this surge tank 5 to a penstock 6.
This is a facility that generates electricity by letting water fall through it to rotate the turbine of the generator 7.

Incidentally, in recent years, erosion of the waterway tunnel 4 has become a major problem in the waterway tunnel type hydroelectric power generation facility. This erosion is a phenomenon that occurs when the bottom of the waterway tunnel 4 is scraped away over time because sand, gravel, and the like flow together with water inside the waterway tunnel 4 .

Therefore, in recent years, it has become necessary to perform internal repair work on the water tunnel type hydroelectric power generation facilities. In carrying out this repair work, power generation will be suspended and water in the tunnel will be removed, so it is necessary to carry out the work easily and quickly from inside the tunnel, as well as to ensure strong reinforcement of the inside of the tunnel. However, at present, there is no effective and appropriate method available for such construction.

In order to meet these demands, the inventors of the present invention have conducted extensive research on internal repair work for waterway tunnels, and as a result, as shown in Fig. A plurality of these lining plates 8 are joined to form a cylindrical shape and sequentially assembled in the axial direction of the waterway tunnel (tunnel length direction). A repair method was proposed in which filler such as mortar was injected and solidified between the plate 8 and the inner wall surface of the waterway tunnel.

``Problem that the invention seeks to solve'' However, the problem with the above repair method is that the lining plate 8 is carried out inside the waterway tunnel.
This is the installation. That is, in order to repair a waterway tunnel, it is necessary to join all the lining plates 8 from the inside of the waterway tunnel so that they form a cylindrical shape. When the lining plate 8' to be installed last is connected to the existing lining plates 8, 8, as shown in FIG.
Even if an attempt is made to fit the two lining plates 8' in between, the end of the lining plate 8' comes into contact with the end of another lining plate 8, resulting in a problem that the fitting cannot be done. Here, if the size of the lining plate 8' to be installed last is formed to be considerably smaller than the other adjacent lining plates 8, 8, it becomes possible to fit the lining plate 8', but in this case, the lining plate 8'8,8'
There is a problem in that as the joint portion between the two becomes larger, it becomes difficult to completely join the joint portion, which may lead to a decrease in strength and water-stopping properties at the joint portion.

The present invention was developed in view of the above circumstances, and when repairing the inner wall surface of a waterway tunnel by joining arc-shaped lining plates in the circumferential direction of the waterway tunnel, it is necessary to join the lining plates from the inside of the waterway tunnel. The purpose of the present invention is to provide a joint structure for a repair lining plate which has a sufficiently high joint strength at the joint part and is excellent in workability.

"Means for solving problems" The present invention was made based on the above background,
A joining structure of lining plates joined inside a waterway tunnel, wherein the outer peripheral side of at least one lining plate among the plurality of lining plates is adjacent to the other lining plate in the circumferential direction of the waterway tunnel. A notch is formed in the end portion to be joined to the lining plate, a groove is formed in the tip side of this notch and the end piece of another lining plate opposite to this tip side, and the groove is placed opposite The lining plates installed in the waterway tunnel are connected to each other by a key plate inserted across both of the grooves.

"Function" The notch formed at the end of the lining plate avoids contact with the end of another lining plate when the lining plate is installed, and allows the lining plate to be installed from inside the waterway tunnel. Further, by inserting the key plate across the grooves of the opposing lining plates, the lining plates can be joined without any gaps.

“Example” Below, the joining structure of an example of the present invention will be described.
Repair work for waterway tunnels using lining plates will be explained with reference to FIGS. 1 to 7.

The lining plates installed in the waterway tunnel T include a lower lining plate 20 installed in the lower half of the waterway tunnel T, and an upper lining plate 30 installed in the upper half of the waterway tunnel T and according to the present invention. There are different types of lining plates.

First, to explain the basic structure of the lower lining plate 20, the lower lining plate 20 is as follows:
As shown in FIGS. 3 and 4, a rectangular end plate 2
A skin plate 2 that covers the inner circumferential side of the main body is attached to the main body assembled by welding 1 and an arc plate-shaped side plate 22.
The basic structure is made by welding 0a, and the overall shape is an arcuate plate that is curved at a constant curvature along the tunnel inner surface. Further, on the side plate 22 of the lining plate 20, a long bolt 23 (a fourth
Through-holes 24 (see figure) are formed at the upper and lower sides of each lining plate 20, respectively, and the skin plate 20a of the lower lining plate 20 is provided with a dolly D ₂ (to be described later) of the lower lining plate 20. A cap nut 29 (see FIG. 3) is provided for use in suspending and supporting the device.

On the other hand, the upper lining plate 3 according to the present invention
The basic structure of 0 is the lower lining plate 20.
It has the same structure as the one shown in FIG. 1, and includes a side plate 32 and a skin plate 30a. Furthermore, here,
Before explaining the detailed structure of the upper lining plate 30, the installation of the lower lining plate 20 will be explained.

FIG. 2 shows a lining plate 20 of the above structure.
2 is a process diagram showing the installation procedure of the lower lining plate 20. Using the figure, the installation procedure of the lining plate 20 will be briefly explained. First, the lower lining plate 2
0 is transported to the work site in the waterway tunnel T by a lining plate transporting trolley D ₁ and then installed in the lower half of the waterway tunnel T by a trolley D ₂ equipped with an erector device.

The lower lining plate 20 installed by the cart D ₂ with the erector device is connected in the length direction of the waterway tunnel T, and is connected to the lower lining plate 20 and the inner wall surface of the waterway tunnel T via the concrete pump P. They are integrated by the filler G filled between them, and are thereby firmly fixed to the lower half of the waterway tunnel T.

On the other hand, the filler G is a concrete bucket truck.
It is carried by D ₃ to the concrete pump P,
It is delivered from the concrete pump P through the injection pipe K.

Each of the bogies D ₁ , D ₂ , and D ₃ runs on a lower lining plate 20 installed in the waterway tunnel T as a rail, and is moved by a drive motor or the like provided on the bogie.

Here, the installation work of the lower lining plate 20 will be further explained in detail.

First, in order to fix the lower lining plate 20, as shown in FIG. 3, drill holes 10 are drilled at the bottom of the inner peripheral wall of the tunnel and on the left and right sides of the inner peripheral wall using a rock drill bit or the like. Anchor fittings 11 are fixed in these drill holes 10.
This anchor fitting 11 is made of a cylindrical body having a screw hole, and the mounting position and number of the anchor fittings 11 depend on the size of the lower lining plate 20, but for example,
As shown in FIG. 3, it is fixed at the bottom and inner surfaces of both sides of the waterway tunnel T, and is located on both sides of the lining plate 20 in the width direction (both sides in the length direction of the tunnel T). A support fitting 12 having a threaded shaft is attached to the anchor fitting 11 at the bottom of the waterway tunnel T, and a lining plate 20 is attached to the anchor fittings 11, 11 on both sides of the waterway tunnel T.
A clip fitting 17 for locking is screwed together.

Next, the lower lining plate 20 is placed on the support fittings 12 at the bottom of the waterway tunnel, and the sides of the lower lining plate 20 are locked to the clip fittings 17 on both sides of the waterway tunnel to attach the lower lining plate 20 to the waterway tunnel. It is fixed to the lower half of the tunnel T as shown in FIG. The height of the lower lining plate 20 can be adjusted using the support fittings 12.
This can be done by adjusting the length of the screw into the anchor fitting 11, and the lateral position adjustment is as follows:
This can be done by adjusting the screwing length of the clip fitting 17 into the anchor fitting 11. Therefore, the lower lining plate 20 can be fixed to the lower half of the waterway tunnel T with high precision.

Next, lower lining plate 2 fixed earlier
Another lower lining plate 20 is installed on the side of 0 by the same procedure, and the adjacent lower lining plates 20, 20 are joined as shown in FIG.

Although the lower lining plate 20 may be installed using a lifting device such as a chain block, the work efficiency can be improved by using a cart _D2 equipped with an erector device 40, which will be described later.

The trolley D ₂ with the erector device 40 is the fifth
As shown in the figure and FIG. 6, there is a bogie D that runs on the upper edge of the lining plate 20 installed in the lower half of the waterway tunnel T as a rail, and a base 41 installed on this bogie D that runs horizontally. A turntable 42 is movably supported, a boom 43 is vertically rotatably supported by the turntable 42, a driving means 44 is provided for vertically rotating the boom 43, and a drive means 44 is provided at the tip of the boom 43. a switch 46 provided at the tip of the boom 43;
The drive means 44 can be actuated by.

Further, the driving means 44 includes the turntable 4
2, a suspension wire 50 fastened to a bracket 49 at the tip of the boom 43 via a winding pulley 48 of an arm 47 installed upright; a winding drum 51 for winding the suspension wire 50;
and a drive motor 52 that rotationally drives the.

As shown in FIG. 6, the holding means 45 for holding the lining plate 20 includes a rotating bracket 54 rotatably supported at the tip of the boom 43 via a rotating shaft 53, and a hinge pin between the rotating bracket 54. 55, and a fixing bolt 57 which is inserted into the cylinder 56 and screwed into the cap nut 29 of the lining plate.

Thus, the erector device 40 configured as described above suspends and supports the lower lining plate 20 by screwing the fixing bolt 57 at the tip of the boom 43 into the cap nut 29 of the lower lining plate 20.
Boom 4 is activated by operating the switch at the tip of boom 43.
3 to move the lower lining plate 20 in three-dimensional directions to position it.

Here, in order to connect the lower lining plate 20 in the length direction of the waterway tunnel T, as shown in FIG.
After the lining plate 20 is installed, the long bolt 23 is inserted into the through hole 24, and then the long nut 28 is inserted into the through hole 24.
Screw it in. Then, simply tighten the long nut 28 onto the long bolt 23. In addition, the lower lining plate 2 along the length direction of the waterway tunnel T
The joining structure of Nos. 0 and 20 is not limited to the above example, and other structures may be used as long as the lower lining plate 20 can be joined in the length direction of the waterway tunnel T.

Next, after fixing the lower lining plates 20..., these lining plates 20
A filler G such as concrete is injected between the inner peripheral wall of the waterway tunnel T and the inner peripheral wall of the waterway tunnel T to integrate them. In this filling operation, the concrete discharge pipe K of the concrete pump P is connected to the lower lining plate 2.
This is done by inserting it into the gap between the concrete pump P and the inner peripheral wall of the tunnel and activating the concrete pump P.

Then, while continuously performing the fixing work of the lower lining plate 20 and the filling work with the filler G,
The lining section will be moved forward and the lower half of the inner peripheral wall of the waterway tunnel T will be repaired. At this time, materials are transported to the repaired area as the repair progresses by using the upper edge of the semi-cylindrical structure constructed each time the lower lining plate 20 is connected in the length direction of the tunnel as a rail. Trucks D ₂ , D ₁ ,
This is done by running D ₃ .

Once the lower half of the waterway tunnel T has been repaired in this way, the upper half of the waterway tunnel T is repaired using the upper lining plate 30 while moving the erector-equipped cart D ₃ backward. .

This upper lining plate 30 is according to the present invention, and its basic structure is the same as that of the lower lining plate 20 as described above, but its detailed structure will be explained below.

Two upper lining plates 30 cover the upper half of the inner peripheral surface of the waterway tunnel T.
It is formed into an arcuate plate shape large enough to cover a predetermined length of the area, and its lower end is
As shown by the solid line in FIG. 1, when the upper lining plate 30 is placed along the inner circumferential wall of the waterway tunnel T, its lower end 30a is made horizontal, and this lower end 30a is connected to the existing lower lining plate. It is formed so that it can be surface-joined to the upper end surface of 20. Further, a notch 32a is formed at the upper end of the upper lining plate 30 shown in FIG. 1 on the inner wall surface side (outer circumferential side) of the waterway tunnel T. This notch 32a is formed by obliquely cutting out the side plate 32 at the upper end of the upper lining plate 30. Note that the notch 32
a is the upper end 20 of the lower lining plate 20;
When the upper lining plate 30 is rotated upward to approach the inner wall surface of the waterway tunnel T from the state in which the lower end of the upper lining plate 30 is brought into contact with the lower end of the upper lining plate 30 as shown in FIG. , are formed for the purpose of avoiding contact with the ends of other upper lining plates 30. Therefore, in this embodiment, the notch 32a is formed in the shape of a slope, but it may be in the shape of a step or a curved surface.
Further, at the upper end of the upper lining plate 30 and on the center side (inner peripheral side) of the waterway tunnel T, a groove 32b facing the other adjacent upper lining plate 30 is formed between the skin plate 30a and the side surface L.
It is surrounded by a character-shaped reinforcing member 32c.
Furthermore, a cylinder 32e forming an injection hole 32d for filling the filler G is fixed to the upper part of the upper lining plate 30.

In order to repair the upper half of the waterway tunnel T using the upper lining plate 30, the waterway tunnel T
A trolley with an erector device was repaired on the lower half of the
This is done by retracting D ₂ and suspending and supporting each upper lining plate 30 using an erector device.

The installation procedure for the upper lining plate 30 is as follows: First, the lower end of the upper lining plate 30 is butted against the upper end 20a of the lower lining plate 20 as shown by the two-dot chain line in FIG. This is done by rotating the plate 30 upward. Here, when installing the first upper lining plate 30 and installing the second upper lining plate 30 on the side thereof, the second upper lining plate 30 is installed at the end of the first upper lining plate 30. Lining plate 3
However, since there is a notch 32a at the upper end of the upper lining plate 30, it is possible to align the ends of the upper lining plates 30 and 30 along the inner wall surface of the waterway tunnel without making them contact each other. be able to. Note that once the lower end surface 30a of the upper lining plate 30 is butted against the upper end surface of the lower lining plate 20, the positioning pin 77 is fitted into the fitting hole 76 provided in this end surface. Further, the upper lining plate 30 is connected in the axial direction using long bolts 23 and long nuts 28, as in the case of the lower lining plate 20.

After the upper lining plates 30, 30 are installed as shown by the solid line in FIG. 1 through the above operations, insert the plate-shaped key plate 33 into the groove 32b from the side of the upper lining plates 30, 30. to cover the joint portion of the upper lining plates 30, 30. This key plate 33 may be the same width as the upper lining plate 30 (width along the length direction of the waterway tunnel T), or may be a fraction of the width of the upper lining plate 30. . That is, by inserting a plurality of key plates 33 shorter than the width of the upper lining plate 30 into the groove 32b, the upper lining plate 30,
Alternatively, by using a key plate 33 that is longer than the width of the upper lining plate 30, a plurality of upper lining plates 30 installed in the length direction of the waterway tunnel T can be joined at once. Also good.

Once the upper lining plate 30 is installed in the upper half of the waterway tunnel T in a predetermined section in this way, the upper lining plate T is installed in the gap between the upper lining plate 30 and the inner wall surface of the waterway tunnel T. The filler is injected and solidified using the concrete pump P through the injection hole 32d. Here, the force acting on the key plate 33 when injecting the filler is only the compressive force due to the arch action, so the joint structure provided with the key plate 33 acts effectively. Then, by solidifying the filler, the upper lining plate 30 and the inner circumferential wall of the waterway tunnel T are integrated, and each upper lining plate 30 is firmly fixed.

Through the above work, the entire inner surface of the waterway tunnel T can be repaired. In addition, if water is poured into the waterway tunnel T after repair, the key plate 3
Although water pressure acts on 3, since there is solidified filler G behind the key plate 33, the joint portion joined using the key plate 33 exhibits sufficiently high strength and water-stopping properties.

Incidentally, in this embodiment, the notches 32a are formed in all of the upper lining plates 30, but the notches are formed in only one of the pair of upper lining plates 30, 30 adjacent in the circumferential direction of the waterway tunnel T. 32a may be provided. In addition, in this embodiment, the waterway tunnel T
Four lining plates 20, 2 in the circumferential direction of
0, 30, and 30 are provided to cover the inner surface of the waterway tunnel T, but it is also possible to have a structure in which the waterway tunnel is covered with five or more lining plates, or two or three lining plates.

"Effects of the Invention" As explained above, the structure of the present invention is such that when connecting lining plates for waterway tunnel repair, the end piece of the lining plate adjacent to another lining plate when installed on the inner wall surface of the waterway tunnel T. Because of the configuration in which the notch is provided on the outside, when the lining plate is placed along the inner wall surface of the waterway tunnel from inside the waterway tunnel, it can be placed along the inner wall surface of the waterway tunnel without coming into contact with other lining plates. Therefore, it becomes possible to install the lining plate all around the inner wall surface of the waterway tunnel from the inside side, and there is an effect that the repair work on the entire inner circumference of the waterway tunnel can be carried out efficiently from the inside of the waterway tunnel.

Further, by inserting the key plate from the side of the lining plate into the groove formed inside the end side of the lining plate, the joint portions of adjacent lining plates can be easily connected without any gaps.

Furthermore, since the joint portions of the lining plates can be connected without any gaps with the key plate, it is possible to achieve a highly watertight joint, and it is possible to obtain a structure with sufficiently high strength at the joint portions.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, and Figs. 2 to 7 are for explaining a method of repairing a waterway tunnel using a lining plate.
Figure 2 is a vertical cross-sectional view showing the waterway tunnel under repair.
Figure 3 is a cross-sectional view showing the lower lining plate installed on the bottom side of the waterway tunnel, Figure 4 is a side view showing the joint state of the lining plate along the length direction of the waterway tunnel, and Figure 5 is a cross-sectional view of the lower lining plate installed on the bottom side of the waterway tunnel. Fig. 6 is a side view showing the tip of the arm of the transport cart, Fig. 7 is a sectional view showing the installation state of the lining plate on the upper part of the waterway tunnel, and Fig. 8 is the waterway tunnel type. FIG. 9 is a block diagram of the power generation facility for explaining the arrangement of the lining plates. T... Channel tunnel, 20... Lower lining plate, 30... Upper lining plate, 3
0a...Skin plate, 32...Side plate, 32a
...Notch, 33...Key plate.

Claims (1)

[Scope of utility model registration request] In the joining structure of arc plate-shaped lining plates that are joined at their edges to form a cylindrical shape along the inner wall surface of the waterway tunnel and used to cover the inner wall surface of the waterway tunnel, Among the lining plates to be joined in the circumferential direction, at least one of the lining plates has a notch formed in the outer peripheral part of the end part, and a notch part is formed in the inner peripheral part of the end part of the lining plate. Concave grooves facing each other are formed on the edge portions, and lining plates installed in the waterway tunnel with the grooves facing each other,
A joining structure of lining plates for repairing waterway tunnels, characterized in that they are connected by a key plate inserted across the opposing grooves.