JPS586040B2 - How to stop water at joints in tunnels and underpasses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for sealing the joints of tunnels and underground passages by leaving a certain amount of space necessary for water to flow and also sufficiently stopping water.

When building tunnels and underground passages, in areas where there is a lot of spring water or natural water leakage, joints are provided on the ceilings and walls of the tunnels and underground passages, and the water is guided from these areas down the walls to the bottom of the tunnels and underground passages. Usually, the waste is discharged into a drain installed in the drain.

However, in the case of walls, if the wall surface is wider than the bottom surface, there is no problem, but in other cases, water accumulated in the joints of the ceiling or wall will fall directly to the bottom of the tunnel or underground passage, causing danger to people. Since it not only makes it difficult to pass by, but also causes unexpected disasters, as it moistens the surface of the road where cars pass, there is a strong demand to eliminate the cause of this problem.

Conventionally, the method of preventing water leakage in tunnels and underpasses was to create joints in tunnels and underpasses at regular intervals perpendicular to the road surface, and leave gaps in some of the joints to close other parts. A filling method is used, in which leakage water is guided into the above-mentioned void and drained into a drainage ditch provided at the bottom of the tunnel or underground passage. Conventionally, a piece of wood is used to create a void in a part of the joint. , a method is adopted in which this piece of wood is inserted into a recessed joint created by cutting out the surface of the piece of wood, creating a gap on the back side of the insertion of the piece of wood, and filling the area recessed from the wall surface on the front side of the piece of wood with sealant. things are being done.

However, there is a limit to the length of the pieces of wood that can be inserted, and if the joints are curved, it is not possible to obtain pieces of wood with the correct shape. It is difficult to provide uniform voids inside the part, and the water resistance is poor, so that the sealing material alone is not sufficient in terms of water resistance.

The present invention solves the above-mentioned drawbacks, uses a water stop plate that is both water resistant and flexible, and makes it easy to provide a gap with a constant cross-sectional area for joints, and also provides a stop for curved joints. This invention has invented a method that allows easy insertion of a water plate and also sufficiently effectively shuts off water.

The present invention will be explained in detail using the drawings.

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view of a water stop plate used in the present invention, FIG. 2 is a perspective view showing a state in which a recessed joint is provided in a tunnel, and FIG. Figure 3 shows a water stop plate inserted into the joint in the tunnel along line A-A' in Figure 2, a gap of a predetermined size on the back side of the water stop plate, and a sealing material on the surface side to make it the same as the other parts. FIG. 3 is a cross-sectional view illustrating a state in which the surface is finished smoothly.

As shown in FIG. 1, the water stop plate 1 used in the present invention is made of a material that is both waterproof and flexible, such as a rubber material, a synthetic resin material, or a mixture of both, and its length is in the shape of an endless band, and its shape is at a 45° angle from both the front and back sides toward the center of the thickness of the board at a position one length of the thickness of the board from the left and right ends. A slanted side edge slope is provided, and a side edge ridgeline is formed at the part where the side edge slopes from both the front and back sides intersect at right angles, and the width of the board is 1.15 to 1.80 times the width of the joint. That is.

By using a water stop plate with the shape described above, the sloped side edges of both the front and back sides intersect at right angles to the recessed joint where the corners are notched at right angles, so water can be stopped as shown in Figure 3. Side edge inclined surfaces 3 and 4 of plate 1 and corner portions 8' and 9 of joint portion 7
' are in contact with each other, and the area of close contact between the water stop plate 1 and the joint portion 7 is increased, and the close contact effect of the water stop plate 1 is increased.

As shown in FIG. 2, an embodiment of the method of the present invention is such that, for example, notch joints having a rectangular cross section are provided at regular intervals on the ceiling and wall surfaces of tunnels and underground passages. Insert the water stop plate as shown in Figure 3, and place the side edge slope 3 of the water stop plate on the back corner part 8' of the back surface 8 of the joint 7, and the side edge slope 4 of the water stop plate on the joint. 1, tightly contact the side corner portion 9' of the side surface 9.

At this time, a gap 10 having a desired cross-sectional area is provided between the inner surface 8 of the joint part 7 and the front surface 5 of the water stop plate 1, and a space is provided between the side surface 9 of the joint part 7 and the back surface 6 of the water stop plate 1. bring forth.

By filling this space 11 with a sealing material 12 and finishing the surface of the joint part 1 to be flush with the ceiling surface and wall surface of the tunnel or underground passage, a uniform gap 10 with a constant cross-sectional area through which water can flow inside the joint part 7 is created. can be created regardless of the shape of the joint.

Therefore, leakage water accumulated in the gap 10 is guided to the drain groove provided at the bottom of the tunnel or underground passage through the surface 5 of the water stop plate 1.

Adhesives may be freely used to ensure even more complete adhesion of the water stop plate 1 to the joint portion 1.

Regarding the size of the water stop plate 1 used in the present invention, the size of the joint part 7, the insertion into the interior of the joint part 7, the size of the joint part 7, the size of the joint part 7, When the joint part γ has a curved shape, the width of the water stop plate 1 is 1.15S1.8Q times the width of the joint part 7, considering prevention of darts at the curved part, workability, and uniform provision of the void 10. The most suitable range is 4% 15 mm from the viewpoint of durability.

An endless strip is used because it is necessary to finish the joint to the desired length without any seams.

The present invention uses a water stop plate made of a material that is both water resistant and flexible, making it easier to handle, improving workability, and having the advantage that the length can be freely selected. It is of great industrial value because it can be easily inserted into the interior of the pipe, uniformly provide voids of a desired size, and ensure water-tightness at joints.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view of a water stop plate used in the present invention, and FIG. 2 is an explanatory perspective view of the present invention implemented at a joint in a tunnel. Figure 3 is the second
FIG. 2 is a cross-sectional view for explaining the embodiment taken along line A-κ in the figure. 1...Water stop plate, 2...Side edge ridge line, 3.
...Side edge slope, 4...Side edge slope, 5
...Front side, 6...Back side, 7...
・Joint part, 8... Back side, 8'... Back corner part, 9... Side face, 9'... Side corner part, 10. ...Void, 11...Space,
j2... Seal material.

Claims (1)

[Claims] 1. In a recessed joint 7 provided in a tunnel or an underground passage, a belt-shaped plate made of a material that is both water resistant and flexible is placed on the front and back at a position 1/2 the length of the thickness of the plate from the left and right edges. A surface is inclined at an angle of 45 degrees from both sides toward the center of the thickness of the board material toward the side edge, and a ridge line is formed at the part where the inclined surfaces from both the front and back sides intersect at right angles, and the thickness of the board material is 45 degrees. ~15mm, and the width of the board is 1.15~1.15mm at the joint.
A band-shaped flexible water stop plate with all surfaces and ridges smoothed at a magnification of 80 times is inserted in a bent state. Back corner part 8 of back side 8
', and the side edge inclined surface 4 is brought into close contact with the side corner part 9' of the side surface 9 of the joint part T, so that a certain size is created between the inner surface 8 of the joint part 7 and the surface 5 of the water stop plate 1. A gap 10 is provided, and a space is created between the side surface 9 of the joint 7 and the back surface 6' of the water stop plate 1, and this space 11 is filled with a sealing material 12 to cover the surface of the joint with the ceiling of a tunnel or underground passage. A water-stopping force method for joints of tunnels and underground passages in which a gap 10 through which water flows is provided inside a joint 7 by finishing the surface flush with the surface of a wall.