JP6013889B2 - Upper concrete impermeable structure of revetment impermeable wall - Google Patents

Description

  The present invention relates to a water-impervious structure applied to an upper concrete installed at the upper end of a vertical water-impervious wall of a seawall such as a waste sea surface disposal site, which is composed of a revetment structure such as a steel pipe sheet pile or steel sheet pile. Concerning the structure, and in order to increase the amount of waste that can be accommodated in the disposal site during and after the construction of the vertical impermeable wall on the revetment, the water-impervious structure applied to the existing upper concrete and the raised part It is related with the water-impervious structure given to the existing upper concrete raised by the addition of the.

  Conventionally, at a seawater revetment at a waste sea surface disposal site, disposal within the disposal site is carried out by a water-impervious wall constructed by arranging a plurality of revetment structures such as steel pipe sheet piles in the direction of the revetment normal on the seabed ground. The area between the open sea and the disposal site is divided so that the contaminated water that exudes from the material does not flow into the open sea.

  In such a disposal site, since the demand amount has increased from the amount of waste that can be accommodated at the time of planning after construction, it may be necessary to increase the amount that can be accommodated. In such a case, for example, in Patent Document 1, an upper concrete wall that constitutes an upper raised portion is constructed on an upper part of a steel pipe sheet pile or the like that constitutes an existing impermeable wall, and a gap between the lower surface on the outer sea side and the impermeable wall is established. Asphalt mixture water barrier layer and continuous with the water barrier layer, the vertical side surface of the upper concrete wall on the outer sea side to the newly accepted waste accumulation level or A method of covering with a water shielding sheet and shielding water has been proposed.

Japanese Patent No. 4979228

  In the construction method described in Patent Document 1 described above, a back layer formed by filling a back stone between the revetment main body such as caisson installed on the open sea side and the impermeable wall installed on the disposal site side However, when the steel pipe sheet piles, etc., constituting the water-impervious wall are deposited up to the upper end, it is possible to perform the water-impervious work on the lower surface of the upper concrete wall above the backing layer. When such a back layer is not provided on the outer sea side of the wall, there is a problem that such a construction method cannot be used.

  In addition, when constructing a raised portion made of an upper concrete wall on a water-impervious wall, the upper concrete wall is generally connected to each other via a joint portion filled with joint material that can be elastically expanded and contracted. It is constructed by arranging in the direction of the seawall normal so as to be continuous. However, since ordinary joint materials have poor water barrier properties, even when there is no crack or the like in the upper concrete wall itself, there is a possibility that contaminated water that exudes from waste on the disposal site side may enter the joints.

  In this respect, in what is described in Patent Document 1, even if contaminated water enters the joints from the disposal site side, the bottom surface and side surface of the upper concrete wall on the outer sea side are the water barrier layer of asphalt mixture or Since the water is shielded by walls, water shielding sheets, etc., the seepage of contaminated water to the outside sea is prevented.

  However, the thickness of the water-impervious layers, walls, water-impervious sheets, etc. of these asphalt mixtures is extremely thin compared to the thickness of the upper concrete wall, and cracks etc. occur in these impermeable parts due to deterioration over time etc. The contaminated water that has passed through the joints may leak out to the outside of the impermeable wall.

  Therefore, the present invention solves the problems in the prior art as described above, and can increase the amount of waste that can be accommodated in the sea surface disposal site. An object of the present invention is to provide an upper concrete water-insulating structure for a water-impervious wall that can increase the amount of waste that can be accommodated later and has high reliability.

  A first one of the upper concrete impermeable structures of the revetment-impervious wall according to the present invention, which is provided to achieve the above object, is constituted by a plurality of revetment structures arranged in the direction of the revetment normal. Water-blocking of the upper concrete, which is constructed at the top of the water wall and is connected to each other via a water-blocking joint that blocks water between adjacent revetment structures and joints provided at positions corresponding to the top and bottom As the joint material to be installed in the joint portion, a water shielding material such as an asphalt mixture is used in a range from the height of the upper concrete upper surface to at least the height of the upper surface of the water shielding joint portion. A water-blocking structure that is continuous in the vertical direction is formed between the joint portion and the corresponding water-blocking joint portion.

  In addition, the second structure of the upper concrete impermeable structure of the revetment impermeable wall according to the present invention is constructed on the upper side of the impermeable wall composed of a plurality of revetment structures arranged in the direction of the revetment normal. A plurality of existing upper-concrete water-impervious structures that are connected to each other via a water-impervious joint part that shields water between matching revetment structures and joints provided at positions corresponding to the upper and lower sides. The existing joint material installed in the joint part in the range from the height of the upper concrete upper surface to the height of the upper end face of at least the water shielding joint part is replaced with a water shielding material such as an asphalt mixture. And a water-impervious joint portion corresponding thereto, a water-impervious structure continuous in the vertical direction is formed.

   In the first and second inventions, the exposed surfaces on both sides of the joint in the range from the height of the upper concrete upper surface to at least the height of the upper end surface of the water-impervious joint are adjacent to each other in the bank protection normal direction. You may be shielded by the joint material outflow prevention board attached between the side wall surfaces of the upper concrete.

  In addition, the third structure of the upper concrete impermeable structure of the revetment impermeable wall of the present invention is constructed on the upper side of the impermeable wall composed of a plurality of revetment structures arranged in the direction of the revetment normal. A plurality of existing upper-concrete water-impervious structures that are connected to each other via a water-impervious joint part that shields water between matching revetment structures and joints provided at positions corresponding to the upper and lower sides. The existing joint material installed in the joint part in the range from the height of the upper concrete upper surface to the height of the upper end face of at least the water shielding joint part is replaced with a water shielding material such as an asphalt mixture. And a water-impervious joint part corresponding thereto, a continuous water-impervious structure is formed in the vertical direction, and a concrete raising part is added to the upper surface of the existing upper concrete, Existing, next to the direction The joints formed between the concrete parts and between the raised parts are continuous in the vertical direction, and in the joint parts between the adjacent raised parts, there is a water shielding material installed in the joint part between the upper concretes. A water shielding material such as an asphalt mixture continuous in the vertical direction is installed.

  In the third aspect of the invention, from the height of the raised portion upper surface of the joint portion formed continuously between the existing upper concrete and the raised portion adjacent to each other to at least the height of the upper end surface of the watertight joint portion. The exposed surfaces on both sides of the joints in the range may be shielded by joint material spill prevention plates attached between the existing upper concrete and the side wall surface over the raised part, which are adjacent in the revetment normal direction. .

  In the third aspect of the present invention, in the raised portion added to the upper surface of the existing upper concrete, a space penetrating in the direction of the seawall normal and opened downward to the upper concrete upper surface is formed. In addition, a water shielding material such as an asphalt mixture for shielding water between the water shielding material installed in the joint portions on both sides of the revetment normal direction and the upper surface of the upper concrete may be installed.

  Furthermore, in the first to third inventions described above, the upper concrete is provided with a vertical hole that communicates between the upper surface thereof and the upper end surface of the water-impervious joint portion disposed therein. In addition, a water shielding material such as an asphalt mixture may be installed in the vertical hole to form a water shielding structure continuous in the vertical direction between the water shielding joint portion.

  According to the upper concrete impermeable structure of the revetment impermeable wall according to the invention described in claim 1, the upper and lower surfaces of the upper concrete constructed on the upper part of the impermeable wall are vertically Since a continuous water-blocking structure is formed, it is possible to deposit the waste stored in the disposal site up to the height of the upper surface of the upper concrete to the maximum, increasing the amount of waste that can be stored in the sea level disposal site. be able to.

  Moreover, at the joint part between the upper concretes, at least the part above the upper end surface of the water-impervious joint part is provided with a water-shielding material such as an asphalt mixture over the entire width. High reliability is obtained.

  According to the upper concrete impermeable structure of the revetment impermeable wall according to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the upper concrete has already been built on the impermeable wall. It is possible to increase the amount of waste that was originally planned at the existing and existing sea surface disposal sites.

  According to the upper concrete impermeable structure of the revetment impermeable wall according to the invention described in claim 3, in particular, a fluidic impermeable material such as asphalt mastic is poured and installed in the joint as a joint material. In some cases, the joint material outflow prevention plate can prevent the outflow of the water shielding material from the inside of the joint portion to the outside during or after the installation.

  According to the upper concrete water-impervious structure of the revetment impermeable wall according to the invention described in claim 4, the water-impervious wall can be provided even in existing or existing sea surface disposal sites where the upper concrete has already been constructed on the impermeable wall. Without sacrificing, the capacity of the originally planned waste can be greatly increased to the maximum height of the upper surface of the raised portion later by adding a raised portion of the desired height on the upper surface of the existing upper concrete. It becomes possible to increase.

  According to the upper concrete impermeable structure of the revetment impermeable wall according to the invention described in claim 5, in particular, a fluid impermeable material such as asphalt mastic is added to the existing upper concrete or the upper concrete. When installing by pouring into the joint part of the raised part, the outflow of the water shielding material from the joint part to the outside can be prevented by the joint material outflow prevention plate during or after the installation.

  According to the upper concrete impervious structure of the revetment impermeable wall according to the invention described in claim 6, in the invention described in claim 4, the upper surface of the existing upper concrete and the lower surface of the raised part constructed thereon are provided. In the unlikely event that water leaks at the joint, the water-blocking material such as asphalt mixture installed in the space inside the raised part reliably prevents the leakage of water from the disposal site to the open sea. Further, it is possible to further improve the reliability against water shielding.

  According to the upper concrete water-impervious structure of the revetment impermeable wall according to the invention described in claim 7, the water-impervious structure disposed in the upper concrete in the invention described in any one of claims 1 to 6. It is possible to further increase the water-imperviousness between the water-impervious joint portion of the wall and the upper concrete.

It is the schematic which shows the whole structure of the impermeable revetment of the waste sea surface disposal site in the 1st Embodiment of this invention. It is a figure which shows the AA cross section of FIG. It is a side view which shows a part of impermeable wall. It is a top view which shows a part of impermeable wall. It is a figure which shows the AA cross section of FIG. It is a figure which shows the BB cross section of FIG. It is a figure which shows CC cross section of FIG. It is sectional drawing of the joint part of the existing upper concrete. It is sectional drawing of the joint part of the existing upper concrete from which the existing joint material was removed partially. It is sectional drawing of the joint part of the upper concrete which attached the joint material outflow prevention board. It is sectional drawing of the joint part of the existing upper concrete which installed the water-impervious joint material. It is a perspective view which shows a part of existing upper concrete in which the raising part was constructed | assembled in the 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which shows a part of existing upper concrete in which the raising part was constructed | assembled in the 3rd Embodiment of this invention. It is a figure which shows the AA cross section of FIG. It is a figure which shows the BB cross section of FIG. It is a top view which shows the water-impervious structure of the joint part of the newly installed upper concrete in the 4th Embodiment of this invention. It is a figure which shows the AA cross section of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing the entire structure of a water-impounding revetment in a waste sea surface disposal site in a first embodiment of an upper concrete impermeable structure of a revetment-impervious wall according to the present invention.

  The impermeable revetment 1 shown in the figure accepts general waste and industrial waste, and then separates the sea surface disposal site from the open sea where the upper layer of accumulated waste is covered with a cover soil M and is used as a landfill. It has steel pipe sheet piles 2 as a large number of revetment structures installed on the seabed ground G in two rows inside and outside in the direction of the revetment normal.

  As shown in FIG. 2, among these two rows of steel pipe sheet piles 2 inside and outside, the steel pipe sheet piles 2 on the inner side (disposal site side) are connected via a water shielding joint portion 2 </ b> A to form a water shielding wall 3. Yes. These water-impervious joint portions 2A have a known structure as described in, for example, Japanese Patent Laid-Open No. 2001-28839, and small steel pipes having slits formed in the vertical direction are engaged with each other through the slits. In addition, a water blocking grout 2B such as an asphalt mixture is applied in the space formed inside these to constitute a vertical water shielding work between the steel pipe sheet piles 2.

  Moreover, the lower end part of each steel pipe sheet pile 2 and the water-impervious joint part 2A is driven into the water-impermeable ground 5 further below the water-permeable ground 4 of the seabed G shown in FIG. The steel pipe sheet piles 2 are connected to each other by a horizontal tie rod 6 near the upper end.

  Further, between the inner and outer two rows of steel pipe sheet piles 2, the middle soil 7 is filled on the sea bottom G to the vicinity of the upper end thereof. In FIG. W. L and L. W. L represents the high and low tide levels in the open sea, respectively. W. L indicates the management water level in the disposal site.

  Moreover, upper concrete 8, 8 'is installed in the upper end part of the steel pipe sheet pile 2 of each row | line | column inside and outside. Of these, the upper concrete 8 ′ on the outer sea side has a conventionally well-known structure, and therefore, in the following, the structure for mounting the upper concrete 8 to the impermeable wall 3 constituted by the row of the inner steel pipe sheet piles 2 will be described. .

3 is a partial side view of the impermeable wall 3, FIG. 4 is a partial plan view of the impermeable wall 3, FIGS. 5, 6, and 7 are AA cross-section, BB cross-section, and C in FIG. 4. It is a figure which shows each -C cross section.
As shown in FIGS. 3 and 4, the upper concrete 8 is arranged in the revetment normal direction and is connected to the upper end of the steel pipe sheet pile 2 connected to each other by the water-impervious joint 2 </ b> A. Are connected to each other via joint portions 9 provided at intervals of a plurality of pitches.

  As shown in FIG. 5, the upper end portion of the steel pipe sheet pile 2 is closed by an upper concrete 8 cast using a buried hanging form 10 and embedded therein. Moreover, the thread part 6A is formed in the edge part of the tie rod 6 passed between the steel pipe sheet piles 2 which oppose the open sea side, and it installs in the horizontal direction in the upper concrete 8, and adjoins the steel pipe sheet pile. It is fastened and fixed by a nut 12 to a connecting member 11 that connects the two members together.

  In addition, in the joint portion 9 formed by the gap between the vertical wall surfaces of the adjacent upper concrete 8, as shown in FIG. A water-impervious joint material 13A is installed in a range H up to the height of the end face. On the other hand, below the range H in the joint portion 9, a general expansion joint material 13 </ b> B that is poor in water shielding but cheaper than the water shielding joint member 13 </ b> A is installed.

  In the present embodiment, asphalt mastic, which is a water shielding material, is used as the water shielding joint material 13A. After the expansion joint material 13B is installed at the lower part of the joint portion 9, it is heated to impart fluidity. Asphalt mastic is poured into the joint portion 9 from above and filled.

  Therefore, the gap between the joint portions 9 is more fluid when filling the upper portion filled with asphalt mastic as the water-impervious joint material 13A than the lower portion where the stretch joint material 13B is installed. Widely formed to ensure.

Further, in the present embodiment, at least the exposed surfaces on both sides of the joint portion 9 in the range H are respectively attached to the joint material so as to straddle the side walls of the upper concrete 8 adjacent in the revetment normal direction. The asphalt mastic, which is shielded by the plate 14 and used as the water-tight joint material 13A, is prevented from flowing out from the joint portion 9 to the outside.
These joint material outflow prevention plates 14 serve to prevent the flexible asphalt mastic from leaking outside the joint part 9 even after the water-impervious joint material 13 </ b> A is installed in the joint part 9.

  As described above, according to the water-impervious structure in the present embodiment, the height of the upper end surface of the water-impervious joint portion 2A is increased from the height of the upper surface of the upper concrete 8 into the joint portion 9 between the upper concrete 8. In the range H up to this point, a water-impervious joint material 13A using asphalt mastic is installed, and the lower end surface of the water-impervious joint material 13A is connected to the upper end surface of the still water grout 2B filled inside the water-impervious joint portion 2A. By adhering to each other, a water shielding structure that is continuous in the vertical direction is formed between the water shielding joint portion 2A and the joint portion 9.

As a result, water shielding up to the height of the upper surface of the upper concrete 8 is possible, so that the waste accommodated in the disposal site is higher than the upper end of the water shielding joint portion 2A and to the maximum height of the upper surface of the upper concrete. It becomes possible to accumulate, and the amount of waste that can be stored in the disposal site can be increased.
The above-described water-impervious joint material 13A is installed up to a position below the upper end surface of the water-impervious joint 2A in the joint part 9, or without using the stretch joint material 13B at all. May be.

  In the present embodiment, as shown in FIG. 7, in order to further increase the water shielding property between the water-impervious joint portion 2 </ b> A embedded in the upper concrete 8 between the joint portions 9 and the upper concrete 8. The vertical holes 15 communicating between the upper surface of the upper concrete 8 and the upper end surface of the water-impervious joint part 2A are formed at positions directly above these water-impervious joint parts 2A, and asphalt mastic is provided in the inside thereof. The used water shielding material 16 is filled.

  The water shielding material 16 is in close contact with the water stop grout 2B filled inside at the upper end surface of the water shielding joint portion 2A to form a water shielding structure continuous with the water shielding joint portion 2A in the vertical direction. ing. In addition, such a vertical hole 15 and the water shielding material 16 provided in the inside thereof are provided when sufficient water shielding is ensured between the upper concrete 8 and the water shielding joint portion 2A embedded therein. May be omitted.

  Next, a second embodiment of the upper concrete impermeable structure of the revetment impermeable wall of the present invention will be described. In the present embodiment, as shown in FIG. 8, the joint portion 9 </ b> A of the existing upper concrete 8 </ b> A is repaired to form a water shielding structure equivalent to the joint portion 9 of the upper concrete 8 described above.

  FIG. 8 shows a cross section of the existing upper concrete 8A at a position corresponding to FIG. 6 in the first embodiment described above. In FIG. 8, the existing upper concrete 8 </ b> A and the members indicated by the same numbers as those in FIG. 6 other than the joint portion 9 </ b> A are the same as those in the first embodiment.

  In the joint portion 9A of the upper concrete 8A before the repair shown in FIG. 8, a general stretch joint material 13B having poor water shielding is installed throughout the joint portion 9A. In refurbishing this joint portion 9A, first, as shown in FIG. 9, the existing stretch joint material 13B in the joint portion 9A in the range H from the upper surface of the upper concrete 8A to the height of the upper end surface of the water-tight joint portion 2A is used. Remove by hanging.

  Next, as shown in FIG. 10, the exposed surfaces on both sides of the joint portion 9 </ b> A in the range H from which the expansion joint material 13 </ b> B has been removed are shielded by the joint material outflow prevention plates 14. These joint material outflow prevention plates 14 are the same as those of the first embodiment described above, so that these side wall surfaces straddle between the side wall surfaces on both sides of the upper concrete 8A adjacent in the revetment normal direction. Secure to.

  Thereafter, as shown in FIG. 11, asphalt mastic that is heated and made fluid in the space of the joint portion 9 </ b> A whose both ends are shielded by the joint material outflow prevention plate 14 is used as a water-tight joint material 13 </ b> A. Pour from above the part 9A and fill.

  Thus, the lower end surface of the water-impervious joint material 13A installed in the joint portion 9A is in close contact with the upper end surface of the water-stop grout 2B filled inside the water-impervious joint portion 2A, and the water-impervious joint portion 2A and the joint portion. A water shielding structure that is continuous in the vertical direction with 9A is formed.

  The upper concrete 8A in which the joint portion 9A has been repaired in this way can ensure the same water-imperviousness as the upper concrete 8 in the first embodiment described above. The planned amount of waste that can be accommodated can be increased later.

  In addition, although illustration is abbreviate | omitted, also in the existing upper concrete 8A, in 1st Embodiment demonstrated previously, the vertical hole similar to what was demonstrated in FIG. A water shielding material such as asphalt mastic may be installed in the vertical hole formed at a position directly above the buried water shielding joint portion 2A.

  Next, FIG. 12 is a partial perspective view of the existing upper concrete in which the raised portion is constructed in the third embodiment of the present invention, and FIG. 13 is a partial longitudinal section of the existing upper concrete in which the raised portion is constructed. 14, FIG. 14 and FIG. 15 are sectional views showing the AA section and the BB section of FIG. 13, respectively.

  In the embodiment shown in these drawings, as in the second embodiment described above, it is necessary to increase the amount of waste that was initially planned at the sea surface disposal site under construction or construction. In this embodiment, the waste in the disposal site can be further accumulated to a height exceeding the upper surface of the existing upper concrete.

  Therefore, in the present embodiment, a concrete raising portion 17 having the same length and width is added to the upper surface of the above-described existing upper concrete 8A to raise the height of the upper concrete 8A. ing.

  In the construction of the raised portion 17, as a pre-process, the joint portion 9 </ b> A in the range H from the upper surface of the upper concrete 8 </ b> A to the height of the upper end surface of the water-impervious joint portion 2 </ b> A, as previously described in FIG. 9. The existing expansion joint material 13B is removed.

  In addition, as in the case described with reference to FIG. 7, the vertical hole 15 is also drilled at a position directly above the water-impervious joint portion 2A embedded in the upper concrete 8A between adjacent joint portions 9A. . In addition, before the raising part 17 is constructed, it is desirable to roughen the upper surface of the upper concrete 8A in order to strengthen the bonding between the raising part 17 and the upper concrete 8A.

  In the present embodiment, as is apparent from FIGS. 12, 13, and 15, the inside of the raised portion 17 penetrates in the direction of the seawall normal, and the lower part is opened to the upper surface of the upper concrete 8A. A tunnel-like space 18 is formed. Moreover, the vertical hole 19 which connects between the upper surface of the raising part 17 and the inside of the said space 18 is formed in the position right above the vertical hole 15 of 8 A of upper concretes.

  Further, as shown in FIG. 14, after the construction of the raised portion 17, the height of the upper surface of the raised portion 17 of the joint portions 9 </ b> A and 9 </ b> B that are continuously formed vertically between the adjacent upper concrete 8 </ b> A and the raised portion 17. The exposed surfaces on both sides of the range h from at least to the height of the upper end surface of the water-impervious joint portion 2A are respectively prevented from leaking joint material between the side walls of the upper concrete 8A and the raised portion 17 that are adjacent to each other in the revetment normal direction. A plate 14A is attached and shielded.

  After attaching the joint material outflow plate 14A, the asphalt mastic that has been heated to have fluidity is heated from the upper end of the joint portion 9B on the raised portion 17 side or the upper surface of the raised portion 17 so as to have fluidity. Pour as. The water shielding material 16 is filled in the joint portions 9A and 9B and the spaces 18, the vertical holes 15 and the vertical holes 19, respectively. The water shielding material 16 filled in the joint portions 9A and 9B is water-permeable. It functions as a joint material 13A.

  In addition, in the thing of this embodiment, since the vertical hole 19 and the joint part 9B which open to the upper surface of the raising part 17 function also as a channel | path for air removal when pouring the water shielding material 16, the water shielding material 16 Can be easily poured. Moreover, the reliability with respect to the water imperviousness of the joint surface between the existing upper concrete 8 </ b> A and the raised portion 17 can be enhanced by the water impervious material 16 filling the space 18.

  Further, the water-stopping grout 2B filled inside the lower water-proof joint portion 2A by the water-proof material 16 filled in the vertical holes 15 of the existing upper concrete 8A is formed at the upper end surface of the water-proof joint portion 2A. In close contact with the water shielding material 16 in the vertical hole 15, a water shielding structure continuous in the vertical direction is formed.

  It is possible to fill the vertical hole 15 with the water shielding material 16 before constructing the raised portion 17 on the upper surface of the upper concrete 8A. Further, similarly to the case of the upper concrete 8 in the first embodiment described above, the vertical hole 15 ensures sufficient water shielding between the upper concrete 8A and the water-impervious joint portion 2A embedded therein. If it is, it may be omitted.

  Next, FIG. 16 is a plan view showing the water-impervious structure of the joint portion of the newly installed upper concrete in the fourth embodiment of the present invention, and FIG. 17 is a view showing a cross section AA of FIG. In the embodiment shown in these drawings, the inner diameter of the joint portion 9C between the adjacent upper concrete 8B in the width direction is larger than the gap between the joint portions 9B, and the water-impervious joint below from the upper end. A vertical hole-shaped expansion joint 20 reaching the upper end surface of 2A is formed, and a water shielding material 21 using asphalt mastic is filled therein.

  In addition, a pair of water-tight joint materials 13 ′ A each made of a sheet-like swellable water-stopping material are installed on both sides of the joint portion 9 </ b> C with the water-proof material 21 in the center. These water-impervious joint materials 13 ′ A swell in the joint portion 9 </ b> C when water is contained, thereby providing a water shielding action.

  In the present embodiment, after constructing one of the adjacent upper concrete 8B, the pair of water-impervious joint materials 13′A described above are arranged on the vertical wall surface serving as the joint portion 9C, and the other upper concrete 8B is further disposed. Then, asphalt mastic which is the water shielding material 21 is filled in the expansion joint portion 20 between the water shielding joint materials 13′A.

  The water shielding material 21 in the expanded joint portion 20 is in close contact with the respective water shielding joint materials 13′A on both sides thereof, and is in close contact with the upper end surface of the water shielding joint portion 2A on the lower side, thereby connecting the joint portion 9C and this. A water-blocking structure that is continuous in the vertical direction is formed with the water-blocking joint portion 2A corresponding to.

The thing of this embodiment has the advantage that a joint material outflow prevention board is unnecessary, since a fluidity impermeable material, such as asphalt mastic, is not used for the joint material installed in a joint part.
Moreover, although description of specific embodiment is abbreviate | omitted, when adding a raising part to the upper surface of the existing upper concrete, it can be set as the same water-impervious structure also in the joint part between raising parts. .

  In each of the embodiments described above, a steel pipe sheet pile is used for the revetment structure constituting the impermeable wall, but the revetment structure is not limited to this, and a steel sheet pile provided with an upper concrete. A reinforced concrete caisson, a hybrid caisson, a steel plate cell, or the like may be used.

  In addition, the water-tight joint material installed at the joint between the upper concrete is not limited to asphalt mixtures such as asphalt mastic and sheet-like swellable water-stopping material, but has flexibility and elasticity. Any water shielding material may be used as the material.

  The present invention is effective for increasing the amount of waste that can be stored at the disposal site, even when the upper concrete is newly installed on the revetment and impermeable walls of the sea surface waste disposal site, and even during or after the construction of the upper concrete. Can be used.

1 Impermeable revetment 2 Steel pipe sheet pile (Revetment structure)
2A Water-blocking joint 2B Water-blocking grout 3 Water-blocking wall 4 Water-permeable ground 5 Water-impermeable ground 6 Tie-rod 6A Screw portion 7 Filled soil 8, 8 ', 8A, 8B Upper concrete 9, 9A, 9B, 9C Joint DESCRIPTION OF SYMBOLS 10 Hanging mold frame 11 Connecting member 12 Nut 13A, 13'A Water-proof joint material 13B Expansion joint material 14, 14A Joint material outflow prevention board 15 Vertical hole 16 Water-shielding material 17 Raised part 18 Space 19 Vertical hole 20 Expansion joint part 21 Impermeable material

Claims (7)

Built on the top of the impermeable wall composed of a plurality of revetment structures arranged in the direction of the revetment normal, it is installed at a position corresponding to the top and bottom of the impermeable joint that shields water between adjacent revetment structures. It is a water-impervious structure of upper concrete that is connected to each other via joints,
As the joint material installed in the joint part, a water shielding material such as an asphalt mixture is used in a range from the height of the upper concrete upper surface to at least the height of the upper surface of the water shielding joint part. An upper concrete impermeable structure for a revetment impermeable wall, characterized in that a water-impervious structure that is continuous in the vertical direction is formed between the impermeable joint portion corresponding to. Built on the top of the impermeable wall composed of a plurality of revetment structures arranged in the direction of the revetment normal, it is installed at a position corresponding to the top and bottom of the impermeable joint that shields water between adjacent revetment structures. The existing upper concrete water-impervious structure connected to each other through joints,
The existing joint material installed in the joint part in the range from the height of the upper surface of the existing upper concrete to at least the height of the upper end surface of the water shielding joint part is replaced with a water shielding material such as an asphalt mixture, An upper concrete impermeable structure for a revetment impermeable wall, characterized in that a continuous impermeable structure is formed between a joint portion and a corresponding impermeable joint portion.   The exposed surfaces on both sides of the joints in the range from the height of the upper concrete upper surface to at least the height of the upper end surface of the water-impervious joint were respectively attached between the side walls of the upper concrete adjacent in the revetment normal direction. The upper concrete impermeable structure for a revetment impermeable wall according to claim 1 or 2, which is shielded by a joint material outflow prevention plate. Built on the top of the impermeable wall composed of a plurality of revetment structures arranged in the direction of the revetment normal, it is installed at a position corresponding to the top and bottom of the impermeable joint that shields water between adjacent revetment structures. The existing upper concrete water-impervious structure connected to each other through joints,
The existing joint material installed in the joint part in the range from the height of the upper surface of the existing upper concrete to at least the height of the upper end surface of the water shielding joint part is replaced with a water shielding material such as an asphalt mixture, Between the joint part and the corresponding water-impervious joint part, a continuous water-impervious structure is formed in the vertical direction,
On the upper surface of the existing upper concrete, a concrete raising part is added,
The joints formed between the existing upper concrete adjacent to the revetment normal direction and between the raised parts are continuous in the vertical direction, and the joints between the adjacent raised parts are located between the upper concretes. An upper concrete impermeable structure for a revetment impermeable wall, characterized in that an impermeable material such as an asphalt mixture continuous in the vertical direction is installed in the joint.   On both sides of the joint portion in the range from the height of the top surface of the joint portion formed continuously between the existing upper concrete and the raised portion adjacent to each other to the height of at least the upper end surface of the water shielding joint portion. The exposed surface is shielded by a joint material outflow prevention plate, which is attached between the existing upper concrete adjacent to the revetment normal direction and the side wall surface extending over the raised portion. The upper concrete impermeable structure of the revetment impermeable wall.   In the raised part added to the upper surface of the existing upper concrete, there is a space that penetrates in the direction of the seawall normal and the lower part is open to the upper surface of the upper concrete, and the joints on both sides in the direction of the seawall normal are formed in the space. The upper part of the revetment impermeable wall according to claim 4 or 5, wherein a water shielding material such as an asphalt mixture that shields water between the water shielding material installed in the section and the upper surface of the upper concrete is installed. Concrete impermeable structure.   A vertical hole is provided in the upper concrete so as to communicate between the upper surface of the upper concrete and the upper end surface of the water-impervious joint portion disposed therein, and the vertical hole is provided with a barrier such as an asphalt mixture. The water revetment impermeable wall according to any one of claims 1 to 6, wherein a water repellent wall is installed to form a continuous water impervious structure between the water impervious joint portion. Upper concrete impermeable structure.

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