JP2020133194A - Cut off structure and cut off method - Google Patents

Abstract

To provide a cutoff structure capable of reducing a water leakage amount into inside of an underground structure.SOLUTION: A cutoff structure cuts off water leakage from a joint part 14 between a side wall part 11a and a side wall part 11b to inside of an underground structure 1 in the underground structure 1 having the side wall part 11a constituting concrete and the side wall part 11b adjacent to the side wall part 11a and constituting concrete. The cutoff structure has a covering part 21 for forming a reserve space SS1 to store water WT1 between the side wall part 11a, the joint part 14 and the side wall part 11b by covering the side wall part 11a, the joint part 14 and the side wall part 11b, a filling part for filling water WT1 stored in the reserve space SS1 and an adjustment part for adjusting a water pressure WP1 of water WT1 stored in the reserve space SS1 to be equal or less than a predetermined upper limit.SELECTED DRAWING: Figure 3

Description

The present invention relates to a water blocking structure and a water stopping method for stopping water leakage into an underground structure.

In underground structures equipped with concrete structures such as tunnels, water guide devices that collect water leaks from construction joints, that is, joints, on the walls of concrete structures and guide them to drainage ditches provided in roadside zones to drain water. , Is provided.

Japanese Patent Application Laid-Open No. 2002-47900 (Patent Document 1) describes a long holder that is a holder for a water guide plate used in a water guide device and is fixed to a wall surface of a structure, along the wall surface and in the longitudinal direction. Seal members are provided on both sides in the width direction perpendicular to the width direction, and screw members screwed to the anchor body embedded in the structure are housed in the intermediate portion in the width direction connecting both side portions in the width direction. A recess is formed so as to face outward on the opposite side of the wall surface of the object, and a pair of fitting holding portions which face outward in the width direction and open are provided on both sides of the recess in the width direction. A technique is disclosed in which one side portion of a water guide plate in the width direction is fitted and held in each fitting holding portion.

JP-A-2002-47900

For example, when an underground structure is constructed deep from the ground surface, the water pressure of the water in the outside soil around the underground structure is significantly higher than the pressure inside the underground structure, which is approximately equal to atmospheric pressure. It gets higher. Therefore, water leaks easily from the outside of the underground structure where the water pressure is extremely high to the inside of the underground structure whose water pressure is substantially equal to the atmospheric pressure through the joint portion of the underground structure, and the amount of water leaking, that is, the amount of water leakage increases. .. In such a case, a water-stop structure that stops water leakage itself from the joint portion of the underground structure to the inside of the underground structure is desired.

Further, even when the underground structure is not constructed at a position deep from the ground surface, for example, when the salt concentration of the leaked water is high, the salt damage of the underground structure is likely to proceed. Even in such a case, a water-stopping structure that stops water leakage itself from the joint portion of the underground structure to the inside of the underground structure is desired.

However, the water guide device described in Patent Document 1 is for collecting water leakage and draining it into a drainage ditch, not for reducing the amount of water leakage itself, but for other effective methods for reducing the amount of water leakage. No method was developed. Therefore, it has been difficult to stop water leakage from the joint portion of the underground structure to the inside of the underground structure by a conventional method such as the water guiding gutter device described in Patent Document 1.

The present invention has been made to solve the above-mentioned problems of the prior art, and is a water leakage amount in a water-stop structure for stopping water leakage from a joint portion of an underground structure to the inside of the underground structure. It is an object of the present invention to provide a waterproof structure capable of reducing the amount of water.

A brief outline of the typical inventions disclosed in the present application is as follows.

The waterproof structure as one aspect of the present invention is the first underground structure including a first wall portion made of first concrete and a second wall portion adjacent to the first wall portion and made of second concrete. It is a water-stop structure that stops water leakage from the first joint between the first wall and the second wall to the inside of the underground structure. The water-stopping structure is a first wall portion that stores water between the first wall portion, the first joint portion, and the second wall portion by covering the first wall portion, the first joint portion, and the second wall portion. The water pressure of the first covering part forming the storage space, the filling part filled with the water stored in the first storage space, and the water stored in the first storage space should be equal to or less than a predetermined upper limit. It has an adjustment unit that adjusts to.

Further, as another aspect, the underground structure extends in the first direction, the first wall portion is the first side wall portion, and the second wall portion is adjacent to the first side wall portion in the first direction. The matching second side wall portion, the first joint portion extends in the second direction intersecting the first direction, and the first cover portion may include a first gutter portion extending in the second direction.

Further, as another aspect, the filling portion is opened at a first position higher than any part of the first storage space, is provided so as to be able to communicate with or shut off from the first storage space, and the first storage space is provided. Including the first supply port to which the water stored in the space is supplied, the adjusting unit includes the first discharge port from which the water stored in the first storage space is discharged, and the first storage space and the first discharge port. A first pressure control valve provided between the and may be included. The filling unit supplies water stored in the first storage space from the first supply port in a state where the first supply port communicates with the first storage space, and then shuts off the first supply port from the first storage space. As a result, the water stored in the first storage space may be filled. When the water pressure exceeds the upper limit value, the adjusting unit communicates the first discharge port with the first storage space by the first pressure control valve, and discharges the water stored in the first storage space from the first discharge port. When the water pressure is not more than the upper limit value, the water pressure may be adjusted to be less than or equal to the upper limit value by shutting off the first discharge port from the first storage space by the first pressure control valve.

Further, as another aspect, the water blocking structure is a height position of a first end portion communicating with the first storage space and the highest portion of the first storage space as a filling portion and an adjusting portion. A pipe portion that includes a second end portion opened at a third position higher than the second position, fills the water stored in the first storage space, and adjusts the water pressure so that it is below the upper limit value. May have. The pipe portion is water stored in the first storage space by supplying water so that the height position of the water surface in the pipe portion of the water supplied from the second end portion to the pipe portion is equal to or higher than the second position. The water pressure was determined according to the height from the second position to the third position by overflowing the water stored in the first storage space from the second end of the pipe. It may be adjusted so that it is equal to or less than the upper limit.

Further, as another aspect, the waterproof structure includes a first ceiling wall portion made of a third concrete and a second ceiling wall portion made of a fourth concrete adjacent to the first ceiling wall portion in the first direction. The water leakage from the second joint portion between the first ceiling wall portion and the second ceiling wall portion to the inside of the underground structure in the underground structure provided with, is stopped. A second storage space for storing water between the first ceiling wall, the second joint, and the second ceiling wall by covering the first ceiling wall, the second joint, and the second ceiling wall. It may have a second covering portion forming the above. The second joint portion extends in the third direction intersecting both the first direction and the second direction, and the second covering portion includes the second gutter portion extending in the third direction, and the second storage space. May communicate with the first storage space, and the filling portion may be filled with water stored in the first storage space and the second storage space.

Further, as another aspect, the filling portion is opened at a fourth position higher than any part of the second storage space, is provided so as to be able to communicate with or shut off from the second storage space, and the second storage space is provided. Including the second supply port to which the water stored in the space is supplied, the adjusting unit includes the second discharge port from which the water stored in the first storage space is discharged, and the first storage space and the second discharge port. A second pressure control valve provided between the two may be included. The filling unit supplies water stored in the second storage space from the second supply port in a state where the second supply port communicates with the second storage space, and then shuts off the second supply port from the second storage space. As a result, the water stored in the first storage space and the second storage space may be filled. When the water pressure exceeds the upper limit, the adjusting unit communicates the second discharge port with the first storage space by the second pressure control valve, and discharges the water stored in the first storage space from the second discharge port. When the water pressure is equal to or less than the upper limit value, the water pressure may be adjusted to be equal to or less than the upper limit value by shutting off the second discharge port from the first storage space by the second pressure control valve.

A method of stopping water as one aspect of the present invention is a method for stopping water in an underground structure including a first wall portion made of first concrete and a second wall portion adjacent to the first wall portion and made of second concrete. This is a water stopping method for stopping water leakage from the first joint portion between the first wall portion and the second wall portion to the inside of the underground structure. In the water stopping method, the first wall portion, the first joint portion, and the second wall portion are covered with the first covering portion, so that the first wall portion, the first joint portion, the second wall portion, and the first covering portion are covered. A step (a) of forming a first storage space for storing water, a step (b) for filling the water stored in the first storage space, and water stored in the first storage space between the two. It has a step (c) of adjusting the water pressure so as to be equal to or less than a predetermined upper limit value.

Further, as another aspect, in the step (b), the first supply is opened at a first position higher than any part of the first storage space and is provided so as to be able to communicate with or shut off from the first storage space. The first storage space is formed by shutting off the first supply port from the first storage space after supplying the water stored in the first storage space from the first supply port in a state where the port communicates with the first storage space. It may be filled with water stored in the space. In the step (c), when the water pressure exceeds the upper limit value, the first discharge port is communicated with the first storage space by the first pressure control valve provided between the first storage space and the first discharge port. The water stored in the first storage space is discharged from the first discharge port, and when the water pressure is equal to or less than the upper limit value, the water pressure is increased by shutting off the first discharge port from the first storage space by the first pressure control valve. It may be adjusted so that it is equal to or less than the upper limit.

Further, as another aspect, in the step (b), the first end portion communicating with the first storage space and the second position which is the height position of the highest portion of the first storage space are higher than the second position. Water is supplied so that the height position of the water surface in the pipe portion of the water supplied from the second end portion of the pipe portion including the second end portion opened at the three positions to the pipe portion is equal to or higher than the second position. By doing so, the water stored in the first storage space may be filled. In the step (c), the water stored in the first storage space overflows from the second end of the pipe portion, so that the water pressure is an upper limit value determined according to the height from the second position to the third position. It may be adjusted so as to be as follows.

By applying one aspect of the present invention, it is possible to reduce the amount of water leakage in a water-stop structure that stops water leakage from the joint portion of the underground structure to the inside of the underground structure.

It is sectional drawing which shows the underground structure provided with the still water structure of embodiment. It is a figure which shows an example of the water-stop structure of an embodiment. It is sectional drawing which shows an example of the water-stopping structure of embodiment. It is sectional drawing which shows an example of the water-stopping structure of embodiment. It is a figure which shows another example of the waterproof structure of embodiment. It is a figure which shows an example of the 1st modification of the water-stop structure of an embodiment. It is a figure which shows another example of the 1st modification of the water-stop structure of embodiment. It is sectional drawing which shows the underground structure provided with the 2nd modification of the waterproof structure of embodiment. It is sectional drawing which shows the 2nd modification of the water-stopping structure of embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate changes while maintaining the gist of the invention are naturally included in the scope of the present invention. Further, in order to clarify the description, the drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the embodiment, but this is just an example, and the interpretation of the present invention is used. It is not limited.

Further, in the present specification and each of the drawings, the same elements as those described above with respect to the above-described drawings may be designated by the same reference numerals, and detailed description thereof may be omitted as appropriate.

Further, in the drawings used in the embodiment, hatching (shading) may be omitted in order to make the drawings easier to see even if they are cross-sectional views. Further, even if it is a plan view, hatching may be added to make the drawing easier to see.

(Embodiment)
The water blocking structure of the embodiment which is one embodiment of the present invention will be described. The water-stop structure of the present embodiment is a water-stop structure that stops water leakage from the joint portion of the underground structure to the inside of the underground structure.

FIG. 1 is a cross-sectional view showing an underground structure provided with a waterproof structure of the embodiment. FIG. 2 is a diagram showing an example of the water blocking structure of the embodiment. 3 and 4 are cross-sectional views showing an example of the water blocking structure of the embodiment. FIG. 5 is a diagram showing another example of the waterproof structure of the embodiment. 3 and 4 are cross-sectional views taken along the line AA of FIG.

As shown in FIG. 1, the underground structure 1 provided with the waterproof structure of the present embodiment is, for example, a tunnel constructed so as to extend in a certain direction in the underground deeply distant from the ground surface. is there. Inside the tunnel, a rail 2 is laid along the tunnel, and a railroad vehicle 3 runs on the rail 2.

In the following, for convenience of explanation, the direction in which the underground structure 1, that is, the tunnel extends, that is, the length direction of the underground structure 1 is referred to as the X-axis direction, and the width direction of the underground structure 1, that is, the tunnel is referred to as the Y-axis direction. In some cases, the vertical direction is referred to as the Z-axis direction. The Z-axis direction may intersect with the X-axis direction and is not limited to the vertical direction. The Y-axis direction may intersect both the X-axis direction and the Z-axis direction, and is not limited to the direction orthogonal to the X-axis direction and is not limited to the direction orthogonal to the Z-axis direction.

As shown in FIGS. 1 to 3, each underground structure 1 includes a plurality of skeletons 10 made of concrete. That is, the underground structure 1 provided with the water-stopping structure of the present embodiment includes a skeleton 10a as a skeleton 10 made of concrete and a skeleton 10b as a skeleton 10 adjacent to the skeleton 10a and made of concrete. There is. The skeleton 10a has a side wall portion 11a as a wall portion 11, a ceiling wall portion 12a as a wall portion 12, and a floor portion 13a as a floor portion 13, and the skeleton 10b has a side wall portion as a wall portion 11. It has 11b, a ceiling wall portion 12b as a wall portion 12, and a floor portion 13b as a floor portion 13.

The underground structure 1 includes a side wall portion 11a made of concrete, a side wall portion 11b adjacent to the side wall portion 11a in the direction in which the underground structure 1 extends (X-axis direction), and a side wall portion 11b made of concrete. A joint portion 14 is formed between the side wall portion 11b and the side wall portion 11b. The joint portion 14 extends in the vertical direction (Z-axis direction).

Further, the underground structure 1 includes a ceiling wall portion 12a made of concrete and a ceiling wall portion 12b adjacent to the ceiling wall portion 12a in the direction in which the underground structure extends (X-axis direction) and made of concrete. A joint portion 15 is formed between the ceiling wall portion 12a and the ceiling wall portion 12b. The joint portion 15 extends in a direction (Y-axis direction) intersecting the direction in which the underground structure 1 extends.

Further, the underground structure 1 includes a floor portion 13a made of concrete and a floor portion 13b adjacent to the floor portion 13a and made of concrete, and a joint portion 16 is provided between the floor portion 13a and the floor portion 13b. It is formed. The joint portion 16 extends in a direction (Y-axis direction) intersecting the direction in which the underground structure 1 extends.

As shown in FIGS. 2 and 3, the water blocking structure has a covering portion 21, a filling portion 22, and an adjusting portion 23, and from the joint portion 14 of the underground structure 1 to the inside of the underground structure 1. It stops the leakage of water. The covering portion 21 is a storage space for storing water WT1 between the side wall portion 11a, the joint portion 14 and the side wall portion 11b by continuously and watertightly covering the side wall portion 11a, the joint portion 14 and the side wall portion 11b. Form SS1. The filling unit 22 fills or replenishes the water WT1 stored in the storage space SS1. The adjusting unit 23 adjusts the water pressure WP1 of the water WT1 stored in the storage space SS1 so as to be equal to or less than a predetermined upper limit value. As will be described later, as the adjusting unit 23, one including a pressure control valve 38 can be used.

When the underground structure 1 is constructed, for example, at a depth of about 40 m from the ground surface, assuming that the rock density is about 2 g / cm ³ , the water pressure of the water in the external soil around the underground structure 1 Is about 0.9 MPa, which is significantly higher than the pressure inside the underground structure 1 which is substantially equal to about 0.1 MPa, which is the atmospheric pressure. Therefore, water easily leaks from the outside of the underground structure 1 having a remarkably high water pressure WP2 to the inside of the underground structure 1 having a water pressure substantially equal to the atmospheric pressure through the joint portion 14, and the amount of water leaking, that is, the amount of water leaking increases. ..

On the other hand, the water blocking structure of the present embodiment has the covering portion 21, the filling portion 22, and the adjusting portion 23 as described above, and the filling portion 22 provides the water WT1 stored in the storage space SS1. It is filled and the adjusting unit 23 adjusts the water pressure WP1 of the water WT1 stored in the storage space SS1 so as to be equal to or less than a predetermined upper limit value. In such a case, the water WT1 can be stored in the storage space SS1 with the water pressure WP1 of the water WT1 stored in the storage space SS1 higher than the atmospheric pressure, and air does not enter the storage space SS1. Can be done. As a result, compared to the case where the cover portion 21 that continuously and watertightly covers the side wall portion 11a, the joint portion 14 and the side wall portion 11b is not provided, the water pressure WP2 is significantly higher from the outside of the underground structure 1 through the joint portion 14. Water WT1 is less likely to leak into the storage space SS1. Therefore, it becomes difficult for water to leak from the outside of the underground structure 1 having a remarkably high water pressure WP2 to the inside of the underground structure 1 through the joint portion 14, and the amount of water leaking, that is, the amount of water leakage can be reduced.

That is, the water-stopping structure of the present embodiment is a gutter structure that has watertightness and can store water, and is a structure that can keep the water pressure of the gutter structure below a certain value by a valve or the like. It is a mechanism that can reduce the amount of water leakage by resisting the groundwater pressure due to the water pressure in the structure.

Further, according to the present embodiment, in addition to reducing the amount of water leakage, the water WT1 stored in the storage space SS1 reduces the salt concentration of the water leakage and reduces the salt damage of the underground structure 1. Can be done.

The salt damage of the underground structure 1 is a deterioration phenomenon caused by the salt-containing groundwater leaking to the inner air side of the underground structure 1 (phenomenon 1) and invading the inside from the concrete surface (phenomenon 2). .. Salt damage is a phenomenon in which reinforcement corrosion progresses when the salt that has entered the concrete destroys the non-conductor coating of the reinforcing bars in the concrete (phenomenon 3). Corrosion reaction requires water and oxygen, and salt damage is more severe in an underwater environment, that is, in an environment where both water and oxygen are supplied, than in an environment where water is abundant but oxygen is scarcely supplied. That is, it is known that reinforcement corrosion easily progresses (phenomenon 4). In addition, if water leakage occurs and stops alternately due to seasonal fluctuations, salt remains even if the water evaporates, so the salt concentration in the water leakage increases and salt damage tends to progress (phenomenon). 5) It becomes a condition.

As a current measure against salt damage, a method of injecting a water blocking material into a crack is used as a measure against the phenomenon that groundwater containing salt leaks to the inner air side of the underground structure 1 (phenomenon 1 above). Further, as a countermeasure against the phenomenon that groundwater containing salt invades the inside from the concrete surface (phenomenon 2 above), a method of coating the concrete surface with a material having high substance diffusion resistance is used. Further, as a countermeasure against the phenomenon that the salt content invading the concrete destroys the non-conductor coating of the reinforcing bar in the concrete (the above phenomenon 3), a method of applying a rust preventive treatment to the raised reinforcing bar is used.

However, no countermeasures have been developed for the phenomenon (phenomenon 4 above) in which salt damage, that is, rebar corrosion is more likely to proceed in an environment where both water and oxygen are supplied. Further, no countermeasure has been developed for the phenomenon that the salt concentration in the leaked water increases when the occurrence of the leaked water and the stop of the leaked water are repeated alternately (the above phenomenon 5).

On the other hand, according to the present embodiment, the side wall portion 11a, the joint portion 14, and the side wall portion 11b are covered by the covering portion 21 in a continuous and watertight manner so that the joint portion 14 is the air on the inner air side of the underground structure 1. Can be prevented or suppressed from coming into contact with. Therefore, it is possible to prevent or suppress the supply of oxygen to the joint portion 14, and it is possible to prevent or suppress the progress of salt damage, that is, corrosion of the reinforcing bar.

Further, as shown in FIGS. 2 and 4, according to the present embodiment, the salt concentration of the leaked WT2 can be reduced by filling the filling portion 22 with the water WT1 stored in the storage space SS1. .. Therefore, it is possible to prevent or suppress the concentration of salt in the concrete due to repeated drying and wetting, and thus it is possible to prevent or suppress the progress of salt damage, that is, rebar corrosion of the underground structure 1. Further, since the water WT1 filled with the filling portion 22 is water containing no salt such as fresh water, the salt concentration of the leaked WT2 can be further reduced, and the salt damage of the underground structure 1, that is, the corrosion of the reinforcing bar progresses. Can be further prevented or suppressed.

That is, the water blocking structure of the present embodiment is a countermeasure against the phenomenon that salt damage, that is, corrosion of reinforcing bars is more likely to proceed in an environment where both water and oxygen are supplied (phenomenon 4 above), and also causes water leakage. This is a countermeasure against the phenomenon that the salt concentration in the leaked water increases when the stoppage is repeated alternately (the above phenomenon 5).

In the water stopping method corresponding to the water stopping structure of the present embodiment, a side wall portion 11a as a wall portion made of concrete and a side wall portion 11b adjacent to the side wall portion 11a and as a wall portion made of concrete are provided. This is a water stopping method using a water stopping structure for stopping water leakage from the joint portion 14 between the side wall portion 11a and the side wall portion 11b to the inside of the underground structure 1 in the provided underground structure 1. In the water stopping method, the side wall portion 11a, the joint portion 14 and the side wall portion 11b are continuously and watertightly covered by the covering portion 21, so that the side wall portion 11a, the joint portion 14 and the side wall portion 11b and the covering portion 21 are covered. Between the step of forming the storage space SS1 for storing water (step S1), the step of filling the water WT1 stored in the storage space SS1 (step S2), and the step of filling the water WT1 stored in the storage space SS1. It has a step (step S3) of adjusting the water pressure WP1 so as to be equal to or less than a predetermined upper limit value.

As shown in FIGS. 2 and 3, when the joint portion 14 extends in the vertical direction (Z-axis direction), the covering portion 21 preferably extends in the vertical direction along the joint portion 14. 24 includes an upper end plate 25 provided at the upper end in the length direction of the gutter 24, that is, in the vertical direction, and a lower end plate 26 provided at the lower end in the length direction of the gutter 24. Further, preferably, the covering portion 21 includes two flat plate portions 27a and 27b connected to both sides in the width direction (X-axis direction) of the gutter portion 24, and a flat plate portion 28 connected to the upper end plate 25. Includes a flat plate portion 29 connected to the lower end plate 26. Further, preferably, the covering portion 21 is interposed between the interposing portion 30a such as a sealing material made of an elastic body interposed between the flat plate portion 27a and the side wall portion 11a, and between the flat plate portion 27b and the side wall portion 11b. An intervening portion 30b such as a sealing material made of an elastic body, an interposing portion such as a sealing material made of an elastic body (not shown) interposed between the flat plate portion 28 and the side wall portions 11a and 11b, and a flat plate portion 29 and a side wall. Includes an intervening portion (not shown) such as a sealing material made of an elastic body interposed between the portions 11a and 11b. Further, the covering portion 21 has a fixing portion 31a such as a bolt for fixing the flat plate portion 27a to the side wall portion 11a via the intervening portion 30a and a flat plate portion 27b screwed to the side wall portion 11b via the intervening portion 30b. Intervention between fixing portions 31b such as bolts to be fixed and fixed, and fixing portions 32a and 32b such as bolts to screw and fix the flat plate portion 28 to the side wall portions 11a and 11b via intervening portions (not shown). Includes fixing portions 33a and 33b such as bolts that screw and fix the flat plate portion 29 to the side wall portions 11a and 11b via the portions (not shown). With such a structure, the side wall portion 11a, the joint portion 14, and the side wall portion 11b can be continuously and watertightly covered by the covering portion 21.

The side wall portion 11a, the joint portion 14, and the side wall portion 11b may be covered by the covering portion 21 continuously and watertightly, and the covering portion 21 may be made of another member.

In the examples shown in FIGS. 2 and 3, preferably, the filling portion 22 is opened at a position HP1 higher than any portion of the storage space SS1, that is, the covering portion 21, and is connected to the storage space SS1, that is, the storage space SS1. It includes a supply port 34 which is provided so as to be able to communicate with or shut off the water WT1 and which is supplied with water WT1 stored in the storage space SS1.

Preferably, the filling portion 22 includes, for example, a storage space SS1, that is, an on-off valve 35 provided between the covering portion 21 and the supply port 34. In the examples shown in FIGS. 2 and 3, specifically, the supply port 34 is connected to the upper part of the storage space SS1 via the supply pipe 36, and is in the middle of the supply pipe 36 connected to the upper part of the storage space SS1. An on-off valve 35 is provided. In step S2, the filling unit 22 supplies the water WT1 stored in the storage space SS1 from the supply port 34 in a state where the on-off valve 35 is opened and the supply port 34 communicates with the storage space SS1, and then the on-off valve 35. Is closed to shut off the supply port 34 from the storage space SS1 to fill the water WT1 stored in the storage space SS1. As a result, the effect of preventing air from entering the storage space SS1 is enhanced.

The water WT1 may be manually supplied to the supply port 34 from, for example, a container installed or transported separately from the supply port 34. For example, the water WT1 is automatically supplied to the supply port 34 from a water pipe or the like connected to the supply port 34. May be supplied.

Further, preferably, the adjusting unit 23 provides a pressure control provided between the storage space SS1, that is, the discharge port 37 from which the water WT1 stored in the cover unit 21 is discharged, and the storage space SS1 and the discharge port 37. Includes valve 38. In the examples shown in FIGS. 2 and 3, specifically, the discharge port 37 is connected to the lower part of the storage space SS1 via the pressure control valve 38. In step S3, when the water pressure WP1 of the water WT1 stored in the storage space SS1 exceeds the upper limit value, the adjusting unit 23 communicates the discharge port 37 with the storage space SS1 by the pressure control valve 38 and enters the storage space SS1. The stored water WT1 is discharged from the discharge port 37, and when the water pressure WP1 is equal to or less than the upper limit value, the discharge port 37 is shut off from the storage space SS1 by the pressure control valve 38, and the water WT1 stored in the storage space SS1 is discharged. By not discharging from the discharge port 37, the water pressure WP1 is adjusted to be equal to or less than the upper limit value. As a result, the water pressure WP1 of the water WT1 stored in the storage space SS1 can be maintained at a pressure higher than the pressure on the inner air side of the underground structure 1, and the water pressure WP2 is extremely high from the outside of the underground structure 1. It becomes difficult for water to leak into the underground structure 1 through the joint portion 14, and the effect of reducing the amount of water leakage is enhanced.

In the example shown in FIGS. 2 and 3, the supply port 34 is connected to the upper part of the storage space SS1, that is, the covering portion 21 via the supply pipe 36, and an on-off valve 35 is provided in the middle of the supply pipe 36. However, the supply port 34 may be opened at a position HP1 higher than any part of the storage space SS1, and the supply port 34 is stored via the supply pipe 36 as in another example shown in FIG. It may be connected to the lower part of the space SS1, or the on-off valve 35 may be provided in the middle of the supply pipe 36 connected to the lower part of the storage space SS1.

Further, in the examples shown in FIGS. 2 and 3, the discharge port 37 is connected to the lower part of the storage space SS1, that is, the covering portion 21 via the pressure control valve 38. However, the supply port 34 may be opened at a position HP1 higher than any part of the storage space SS1, and the discharge port 37 is stored via the pressure control valve 38 as in another example shown in FIG. It may be connected to the upper part of the space SS1.

Alternatively, the covering portion 21 continuously and watertightly covers the ceiling wall portion 12a, the joint portion 15 and the ceiling wall portion 12b, thereby providing a storage space between the ceiling wall portion 12a, the joint portion 15 and the ceiling wall portion 12b. It may be the one that forms. Further, the covering portion 21 forms a storage space between the floor portion 13a, the joint portion 16 and the floor portion 13b by continuously and watertightly covering the floor portion 13a, the joint portion 16 and the floor portion 13b. It may be. However, when the covering portion 21 continuously and watertightly covers the side wall portion 11a, the joint portion 14 and the side wall portion 11b, the discharge port 37 can be guided from the lower part of the covering portion 21 to the drainage ditch of the underground structure 1. Etc., easy to install.

<First modification of the waterproof structure of the embodiment>
FIG. 6 is a diagram showing an example of a first modification of the waterproof structure of the embodiment. FIG. 7 is a diagram showing another example of the first modification of the waterproof structure of the embodiment.

As shown in FIG. 6, the water blocking structure of the first modification preferably has a filling portion 22 and a pipe portion 41 as an adjusting portion 23, that is, a water gutter. The pipe portion 41 is located at a position higher than the storage space SS1 (see FIG. 3), that is, the end portion 42 communicating with the covering portion 21, and the storage space SS1, that is, the position HP2 which is the height position of the highest portion of the covering portion 21. Includes an end 43 opened at HP3. In the example shown in FIG. 6, specifically, the end portion 42 of the pipe portion 41 is connected to the lower portion of the storage space SS1.

Preferably, the pipe portion 41 is stored by supplying the water WT1 so that the height position of the water surface in the pipe portion 41 of the water WT1 supplied from the end portion 43 to the pipe portion 41 is equal to or higher than the position HP2. The water WT1 stored in the space SS1 (see FIG. 3) is filled. As a result, the effect of preventing air from entering the storage space SS1 is enhanced.

The end 43 may be manually supplied with water WT1 from, for example, a container installed or transported separately from the end 43. For example, the water WT1 is automatically supplied to the end 43 from a water pipe or the like connected to the end 43. May be supplied.

Further, preferably, in the pipe portion 41, the storage space SS1 (see FIG. 3), that is, the water WT1 stored in the cover portion 21 overflows from the end portion 43 of the pipe portion 41, so that the storage space SS1, that is, the cover portion 21 The water pressure WP1 (see FIG. 3) of the water WT1 stored in the water WT1 is adjusted to be equal to or less than the upper limit value determined according to the height from the position HP2 to the position HP3. As a result, the water pressure WP1 of the water WT1 stored in the storage space SS1, that is, the covering portion 21 can be maintained at a pressure higher than the pressure on the inner air side of the underground structure 1, and the effect of reducing the amount of water leakage is enhanced.

In this first modification, the water blocking structure has only the covering portion 21 and the pipe portion 41 as the filling portion 22, and the pipe portion 41 as the filling portion 22 is the storage space SS1 (FIG. 3) That is, the water WT1 stored in the storage space SS1 is filled while adjusting the water pressure WP1 (see FIG. 3) of the water WT1 stored in the covering portion 21 to be equal to or less than a predetermined upper limit value. It is also possible to paraphrase. Further, in the first modification, the water blocking structure has only the covering portion 21 and the pipe portion 41 as the adjusting portion 23, and the pipe portion 41 as the adjusting portion 23 is stored in the storage space SS1. In other words, the water pressure WP1 of the water WT1 stored in the storage space SS1 is adjusted so as to be equal to or less than a predetermined upper limit value.

Further, in the example shown in FIG. 6, the end portion 42 of the pipe portion 41 is connected to the storage space SS1 (see FIG. 3), that is, the lower portion of the covering portion 21. However, the end portion 43 may be opened at a position HP3 higher than the position HP2 which is the height position of the highest portion of the storage space SS1, and the pipe portion 41 may be opened as in another example shown in FIG. The end 42 of the storage space may be connected to the upper part of the storage space SS1.

<Second modification of the waterproof structure of the embodiment>
FIG. 8 is a cross-sectional view showing an underground structure provided with a second modification of the waterproof structure of the embodiment. FIG. 9 is a cross-sectional view showing a second modification of the water blocking structure of the embodiment.

As shown in FIGS. 8 and 9, in the second modification, the water blocking structure includes the covering portion 21, the filling portion 22, the adjusting portion 23, the covering portion 51, and the connecting portion. 52, to stop water leakage from the joint portion 14 of the underground structure 1 (see FIG. 2) to the inside of the underground structure 1, and from the joint portion 15 of the underground structure 1 to the underground structure 1 It is possible to stop water leakage to the inside of. The covering portion 51 continuously and watertightly covers the ceiling wall portion 12a, the joint portion 15 and the ceiling wall portion 12b, so that the water WT1 is provided between the ceiling wall portion 12a, the joint portion 15 and the ceiling wall portion 12b. A storage space SS2 for storage is formed. The storage space SS2, that is, the covering portion 51 is arranged above the storage space SS1 (see FIG. 3), that is, the covering portion 21, the connecting portion 52 connects the storage space SS1 and the storage space SS2, and the storage space SS2 is It communicates with the storage space SS1. The storage space SS2 may be directly connected to the storage space SS1 without the connection portion 52 being provided.

When the joint portion 15 extends in the width direction (Y-axis direction) of the underground structure 1, as shown in FIGS. 8 and 9, preferably, the covering portion 51 is the underground structure along the joint portion 15. An underground structure of a gutter 54, an end plate 55 provided at an end opposite to the cover 21 side in the width direction of the underground structure 1 of the gutter 54, and a gutter 54 extending in the width direction of 1. The end plate 56 provided on the cover portion 21 side in the width direction of the object 1 is included. Further, preferably, the covering portion 51 includes two flat plate portions 57a and 57b connected to both sides in the width direction (X-axis direction) of the gutter portion 54, and a flat plate portion 58 connected to the end plate 55. A flat plate portion 59 connected to the end plate 56 is included. Further, preferably, the covering portion 51 is provided between an intervening portion 60a such as a sealing material made of an elastic body interposed between the flat plate portion 57a and the ceiling wall portion 12a, and between the flat plate portion 57b and the ceiling wall portion 12b. Includes an intervening portion 60b such as a sealing material made of an interposing elastic body. Further, the covering portion 51 includes a fixing portion 61a such as a bolt for fixing the flat plate portion 57a to the ceiling wall portion 12a via the intervening portion 60a and a flat plate portion 57b via the intervening portion 60b to the ceiling wall portion 12b. Includes a fixing portion 61b such as a bolt that is screwed to and fixed to the ceiling. With such a structure, the ceiling wall portion 12a, the joint portion 15, and the ceiling wall portion 12b can be continuously and watertightly covered by the covering portion 51.

It is sufficient that the ceiling wall portion 12a, the joint portion 15, and the ceiling wall portion 12b can be continuously and watertightly covered by the covering portion 51, and the covering portion 51 may be made of another member. Further, even in the above example, depending on the shape of the connecting portion 52, the end plate 56, the flat plate portion 59, the upper end plate 25 (see FIG. 2), and the flat plate portion 28 (see FIG. 2) may be omitted. it can.

In the examples shown in FIGS. 8 and 9, the filling portion 22 is preferably opened at a position HP4 higher than any portion of the storage space SS2, that is, the covering portion 51, instead of the supply port 34 (see FIG. 2). Includes a supply port 64 that is provided so as to communicate with or shut off from the storage space SS2, that is, to the storage space SS2, and to which the water WT1 stored in the storage space SS2 is supplied.

Preferably, the filling portion 22 includes an on-off valve 65 provided between the storage space SS2, that is, the covering portion 51 and the supply port 64, instead of the on-off valve 35 (see FIG. 2). In the examples shown in FIGS. 8 and 9, specifically, the supply port 64 is connected to the storage space SS2 via the supply pipe 66, and the on-off valve 65 is provided in the middle of the supply pipe 66 connected to the storage space SS2. It is provided. In step S2, the filling unit 22 closes the on-off valve 65 after supplying water WT1 from the supply port 64 to the storage space SS2 in a state where the on-off valve 65 is opened and the supply port 64 is communicated with the storage space SS2. By shutting off the supply port 64 from the storage space SS2, the water WT1 stored in the storage space SS2 and the storage space SS1 is filled. As a result, the effect of preventing air from entering the storage space SS2 is enhanced.

Water may be manually supplied to the supply port 64 from a container installed or transported separately from the supply port 64, for example, water is automatically supplied from a water pipe or the like connected to the supply port 64. You may. Further, even when the supply port 64 is opened at a height position equal to the height position of the highest portion of the storage space SS2, that is, the covering portion 51, the storage space SS2 is filled with water WT1 so as not to mix air. be able to.

Further, preferably, the adjusting unit 23 has a storage space SS1, that is, a discharge port 37 from which the water WT1 stored in the covering portion 21 is discharged, as in the embodiment described with reference to FIG. A pressure control valve 38 provided between the storage space SS1 and the discharge port 37 is included. Specifically, the discharge port 37 is connected to the lower part of the storage space SS1 via the pressure control valve 38. In step S3, when the water pressure WP1 of the water WT1 stored in the storage space SS1 exceeds the upper limit value, the adjusting unit 23 communicates the discharge port 37 with the storage space SS1 by the pressure control valve 38 and enters the storage space SS1. The stored water WT1 is discharged from the discharge port 37, and when the water pressure WP1 is equal to or less than the upper limit value, the discharge port 37 is shut off from the storage space SS1 by the pressure control valve 38, and the water WT1 stored in the storage space SS1 is discharged. By not discharging from the discharge port 37, the water pressure WP1 is adjusted to be equal to or less than the upper limit value. As a result, in addition to the water pressure WP1 of the water WT1 stored in the storage space SS1, that is, the covering portion 21, the water pressure WP1 of the water WT1 stored in the storage space SS2, that is, the covering portion 51 is also air-spaced in the underground structure 1. It is possible to maintain a pressure higher than the pressure on the side, and it is difficult for water to leak from the outside of the underground structure 1 where the water pressure WP2 is extremely high to the inside of the underground structure 1 through both the joints 14 and 15, and the amount of water leakage. The effect of reducing the amount of water pressure is further enhanced as compared with the embodiment.

In the example shown in FIGS. 8 and 9, the supply port 64 is connected to the storage space SS2, that is, the covering portion 51 via the supply pipe 66, and an on-off valve 65 is provided in the middle of the supply pipe 66. However, the supply port 64 may be opened at a position HP4 higher than any part of the storage space SS2, and the supply port 64 may be connected to the storage space SS1 via the supply pipe 66, and the storage space may be connected. An on-off valve 65 may be provided in the middle of the supply pipe 66 connected to the SS1.

Further, in the examples shown in FIGS. 8 and 9, the discharge port 37 is connected to the storage space SS1, that is, the covering portion 21 via the pressure control valve 38. However, the supply port 64 may be opened at a position HP4 higher than any part of the storage space SS2, and the discharge port 37 may be connected to the storage space SS2 via the pressure control valve 38.

Although the invention made by the present inventor has been specifically described above based on the embodiment thereof, the present invention is not limited to the embodiment and can be variously modified without departing from the gist thereof. Needless to say.

Within the scope of the idea of the present invention, those skilled in the art can come up with various modified examples and modified examples, and it is understood that these modified examples and modified examples also belong to the scope of the present invention.

For example, a person skilled in the art appropriately adds, deletes, or changes the design of each of the above-described embodiments, or adds, omits, or changes the conditions of the process of the present invention. As long as it has a gist, it is included in the scope of the present invention.

The present invention is effective when applied to a water-stopping structure and a water-stopping method for stopping water leakage into an underground structure.

1 Underground structure 2 Rail 3 Railroad vehicle 10, 10a, 10b Frame 11, 12 Wall 11a, 11b Side wall 12a, 12b Ceiling wall 13, 13a, 13b Floor 14-16 Joint 21, 51 Cover 22 Filling Part 23 Adjusting part 24, 54 Gutter part 25 Upper end plate 26 Lower end plate 27a, 27b, 28, 29, 57a, 57b, 58, 59 Flat plate parts 30a, 30b, 60a, 60b Intervening parts 31a, 31b, 32a, 32b, 33a , 33b Fixed part 34, 64 Supply port 35, 65 On-off valve 36, 66 Supply pipe 37 Discharge port 38 Pressure control valve 41 Pipe part 42, 43 End part 52 Connection part 55, 56 End plate 61a, 61b Fixed part HP1 to HP4 Position SS1, SS2 Storage space WP1, WP2 Water pressure WT1 Water WT2 Leakage

Claims (9)

The first wall portion and the second wall portion in an underground structure including a first wall portion made of first concrete and a second wall portion adjacent to the first wall portion and made of second concrete. In the water-stop structure that stops water leakage from the first joint between the joints to the inside of the underground structure.
By covering the first wall portion, the first joint portion and the second wall portion, water is stored between the first wall portion, the first joint portion and the second wall portion. The first covering that forms the storage space,
A filling part that fills the water stored in the first storage space,
An adjustment unit that adjusts the water pressure of the water stored in the first storage space so that it is below a predetermined upper limit.
Has a waterproof structure. In the waterproof structure according to claim 1,
The underground structure extends in the first direction and
The first wall portion is a first side wall portion, and is
The second wall portion is a second side wall portion adjacent to the first side wall portion in the first direction.
The first joint extends in a second direction intersecting the first direction.
The first covering portion has a water blocking structure including a first gutter portion extending in the second direction. In the waterproof structure according to claim 1 or 2,
The filled portion is opened at a first position higher than any part of the first storage space, is provided so as to be able to communicate with or shut off from the first storage space, and is stored in the first storage space. Including the first supply port to which water is supplied
The adjusting part
The first discharge port from which the water stored in the first storage space is discharged, and
A first pressure control valve provided between the first storage space and the first discharge port,
Including
The filling unit supplies water stored in the first storage space from the first supply port in a state where the first supply port communicates with the first storage space, and then connects the first supply port to the first supply port. By shutting off from the first storage space, the water stored in the first storage space is filled and
When the water pressure exceeds the upper limit value, the adjusting unit communicates the first discharge port with the first storage space by the first pressure control valve, and collects the water stored in the first storage space. When the water is discharged from the first discharge port and the water pressure is equal to or lower than the upper limit value, the water pressure is equal to or lower than the upper limit value by shutting off the first discharge port from the first storage space by the first pressure control valve. Water-stop structure that adjusts to. In the waterproof structure according to claim 1 or 2,
As the filling portion and the adjusting portion, at the first end portion communicating with the first storage space and at a third position higher than the second position which is the height position of the highest portion of the first storage space. It has a second end portion that is opened, and has a pipe portion that fills the water stored in the first storage space and adjusts the water pressure so as to be equal to or less than the upper limit value.
The first storage is performed by supplying water so that the height position of the water surface in the pipe portion of the water supplied from the second end portion to the pipe portion is equal to or higher than the second position. Fill the space with water
In the pipe portion, the water stored in the first storage space overflows from the second end portion of the pipe portion, so that the water pressure corresponds to the height from the second position to the third position. A water-stop structure that is adjusted so that it is below the specified upper limit. In the waterproof structure according to claim 2,
The water-stop structure includes a first ceiling wall portion made of a third concrete and a second ceiling wall portion made of a fourth concrete adjacent to the first ceiling wall portion in the first direction. It is intended to stop water leakage from the second joint portion between the first ceiling wall portion and the second ceiling wall portion in the structure to the inside of the underground structure.
The water blocking structure covers the first ceiling wall portion, the second joint portion, and the second ceiling wall portion, thereby forming the first ceiling wall portion, the second joint portion, and the second ceiling wall portion. It has a second covering that forms a second storage space for storing water between the two.
The second joint extends in a third direction that intersects both the first direction and the second direction.
The second covering portion includes a second gutter portion extending in the third direction.
The second storage space communicates with the first storage space,
The filling portion has a water-stop structure that fills the water stored in the first storage space and the second storage space. In the waterproof structure according to claim 5,
The filled portion is opened at a fourth position higher than any part of the second storage space, is provided so as to be able to communicate with or shut off from the second storage space, and is stored in the second storage space. Including the second supply port to which water is supplied
The adjusting part
A second discharge port from which the water stored in the first storage space is discharged, and
A second pressure control valve provided between the first storage space and the second discharge port,
Including
The filling unit supplies water stored in the second storage space from the second supply port in a state where the second supply port communicates with the second storage space, and then connects the second supply port to the second supply port. By shutting off from the second storage space, the water stored in the first storage space and the second storage space is filled.
When the water pressure exceeds the upper limit value, the adjusting unit communicates the second discharge port with the first storage space by the second pressure control valve, and causes the water stored in the first storage space to be communicated with the first storage space. When the water is discharged from the second discharge port and the water pressure is equal to or lower than the upper limit value, the water pressure is equal to or lower than the upper limit value by shutting off the second discharge port from the first storage space by the second pressure control valve. Water-stop structure that adjusts to. The first wall portion and the second wall portion in an underground structure including a first wall portion made of first concrete and a second wall portion adjacent to the first wall portion and made of second concrete. In the water stopping method for stopping water leakage from the first joint between the joints to the inside of the underground structure.
(A) By covering the first wall portion, the first joint portion and the second wall portion with the first covering portion, the first wall portion, the first joint portion and the second wall portion, and the said A step of forming a first storage space for storing water between the first cover and the first cover.
(B) A step of filling the water stored in the first storage space,
(C) A step of adjusting the water pressure of the water stored in the first storage space so as to be equal to or less than a predetermined upper limit value.
A method of stopping water. In the water stopping method according to claim 7,
In the step (b), the first supply port, which is opened at a first position higher than any part of the first storage space and is provided so as to communicate with or shut off from the first storage space, is the first. After supplying the water stored in the first storage space from the first supply port in a state of communicating with the storage space, the first storage port is shut off from the first storage space, whereby the first storage Fill the space with water
In the step (c), when the water pressure exceeds the upper limit value, the first discharge port is opened by the first pressure control valve provided between the first storage space and the first discharge port. The water stored in the first storage space is discharged from the first discharge port by communicating with the storage space, and when the water pressure is equal to or less than the upper limit value, the first discharge port is opened by the first pressure control valve. A water stopping method in which the water pressure is adjusted to be equal to or lower than the upper limit value by shutting off from the first storage space. In the water stopping method according to claim 7,
In the step (b), the first end portion communicating with the first storage space and the third position higher than the second position, which is the height position of the highest portion of the first storage space, are opened. Water is supplied so that the height position of the water surface in the pipe portion of the water supplied from the second end portion of the pipe portion including the second end portion to the pipe portion is equal to or higher than the second position. As a result, the water stored in the first storage space is filled with water.
In the step (c), the water stored in the first storage space overflows from the second end of the pipe portion, so that the water pressure becomes a height from the second position to the third position. A water stopping method that adjusts so that it is equal to or less than the upper limit value determined accordingly.

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