JP2992743B2 - Seawall structure of revetment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for stopping water from a seawall using a seawall block or a futon basket made of concrete.

[0002]

2. Description of the Related Art A block revetment in which a number of seawalls are laid on a slope such as a dike is a first step of constructing partition beams on a slope and a second step of laying a water-blocking mat over the entire surface of the ground. The third step of laying a large number of seawalls on the impermeable mats and the fourth step of stopping the water between the partition beams and the impermeable mats, and if necessary, greening until the seawall blocks and partitions are hidden A fifth step of covering the embankment is added. As for the water stoppage treatment between the partition beam and the impermeable mat, as shown in FIG. 8, one of the narrow water stop sheets a is bonded to the side surface of the partition beam b with an agent such as an adhesive, and the water stop sheet is also provided. The other of a is superimposed on the impermeable mat c.

[0003]

However, since the water-stop sheet a is in the form of a thin film, it is technically difficult to completely adhere the entire length of the side surface of the partition beam b, and wrinkles are easily formed. If wrinkles occur on a part of the water-stop sheet a, there is a danger that the embankment will break due to flooding from the gaps between the wrinkles, no matter how closely the other is adhered. In addition, since the operation of applying the adhesive to the side surface of the water-stop sheet a or the partition beam b and the operation of attaching the water-stop sheet a depend on the manual work of the operator, a large amount of labor is required. And need time.

The present invention has been made in view of the above points, and an object of the present invention is to provide a watertight structure for a seawall, which has high reliability in waterstop performance and can be easily constructed. .

[0005]

According to the first aspect of the present invention, a water-blocking mat is laid on a laying surface of a seawall composed of a plurality of seawall blocks, and concrete is provided across the side surfaces of the seawall blocks. In the watertight structure of the seawall, where the seawall block is laid on the water-impervious mat located inside the beam body, a steel beam body is constructed A water-stop sheet is interposed between the beam body and the extra length of the water-stop sheet extended out of the groove and the end of the water-blocking mat are superimposed, so that the water-stop sheet is located between the water-blocking mat. This is a water barrier structure for the revetment, characterized by continuously stopping water. In the invention according to claim 2, a water-blocking mat is laid on a laying surface of a seawall composed of a plurality of seawall blocks, and a concrete beam body is constructed across the side surfaces of the plurality of seawalls. In the watertight structure of a seawall where a seawall is laid on a water-impervious mat located inside the body, one of the waterstop sheets is continuous along the side of the beam body built in place at the site. The other extra length of the waterproof sheet overlaps with the end of the waterproof mat, and the waterproof sheet stops the water between the waterproof mat and the side of the beam. It has a waterproof structure. The invention according to claim 3 is the water barrier structure of the revetment according to claim 2, characterized in that one of the waterproof sheets is embedded in the side surface of the beam located in the groove. The invention according to claim 4 is the water barrier structure of the revetment according to claim 2, characterized in that one of the waterproof sheets is embedded in a side surface of a beam body exposed to the ground. The invention according to claim 5 is the invention according to claim 2
5. The method according to claim 4, wherein one of the water-stop sheets is embedded in an uneven shape on a side surface of the beam.
It is a water barrier structure of the revetment. The invention according to claim 6 is the revetment according to claim 1 or 2, wherein the water-blocking mat is constituted by attaching a reinforcing mat to only a water-stop sheet or to one surface of the water-stop sheet. It has a waterproof structure.

[0006]

[Embodiment 1] The water blocking structure of a revetment will be described with reference to FIGS. In this embodiment, a case where a revetment block is used will be described. <A> Seawall A schematic view of seawall using the seawall block 1 is shown in FIGS. The revetment block 1 includes well-known various concrete blocks. The illustrated revetment block 1 forms joints that can be fitted to left and right side surfaces 1a and 1b of a rectangular block body, and upper and lower side surfaces. 1ca and 1b are formed with joints, and their front and rear surfaces 1c and 1d are formed with curved uneven joints, and these joints are fitted and laid. 1e is a through hole for inserting a wire into the front and rear side surfaces of the revetment block 1.
The present invention relates to a waterproof structure between a partition beam 3 and a waterproof mat 6 which will be described later, and a detailed description of a revetment block 1 is omitted.

<B> Partition Beam A groove 4 is formed in the ground 2 on the slope of the embankment where the revetment block 1 is to be laid. The groove 4 is for inserting the partition beam 3,
The forming direction is the same as the conventional one. Up to now, the partition beam 3 has been constructed by casting concrete in the groove 4. However, in the present invention, the partition beam 3 is constructed by laying the waterproof sheet 5 in the groove 4. The water-stop sheet 5 is a water-stop sheet that stops the entire surface of the inner wall of the groove 4. The width of the water-stop sheet 5 is such that at least the extra length 51 is formed on the ground side when laid along the inner wall of the groove 4. The length of the waterproof sheet 5 may be the same as the length of the groove 4. After the waterproof sheet 5 is laid in the groove 4, the formwork is assembled on the ground side and then concrete is cast to construct the partition beam 3. The lower half outer peripheral surface of the partition beam 3 constructed in this manner is covered with the waterproof sheet 4. The extra length 51 is left as it is on the ground surface side.

<C> Water-proof mat After or simultaneously with the construction of the partition beam 3, a water-proof mat 6 is laid on the entire surface of the ground 2. The water-blocking mat 6 may be a single sheet having a water-blocking property, or a laminate in which a reinforcing mat such as felt is laminated on one side of the sheet.

<D> Connection of Sheet and Mat As shown in FIG. 1, the extra length 51 of the waterproof sheet 5 covering the lower half outer periphery of the partitioning beam 3 and the end of the waterproofing mat 6 are overlapped and joined. Adhesive is not used for joining the extra length portion 51 and the end of the water-blocking mat 6, and the waterproofness is secured by using the load of the seawall block 1. The water stopping performance of this polymerization section is
And the impermeable mat 6 are affected
It is important to ensure a sufficient length. When the superposition of the extra length 51 of the waterproof sheet 5 and the end of the waterproof mat 6 is completed, the revetment block 1 is installed and the construction is completed.

[0010]

[Action] Next, the water stopping performance of the revetment will be examined.

The water blocking mat 6 laid on the entire surface of the installation surface of the revetment block 1 except for the partitioning beam 3 ensures the waterproofness as in the conventional case.

In addition, between the partition beam 3 and the impermeable mat 6, the waterproof sheet 5 passes through the lower half outer periphery of the partition beam 3
Is connected between the water-blocking mats 6 and 6 located on both sides of the partition wall 3, even if water enters between the partition beam 3 and the water-blocking sheet 5, the water is blocked by the water-blocking sheet 5 and cannot be transmitted. Therefore, the water-stop sheet 5 ensures the water-stop between the partition beam 3 and the water-blocking mat 6.

[0013]

Embodiment 2 FIG. 4 shows one of the waterproof sheets 5 52.
Is embedded in the side surface 31 of the basement section of the partition beam 3. In the following description of the present embodiment, the same parts as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted. An uneven portion 53 having an uneven shape is provided in advance on one side 52 of the water stop sheet 5 facing the side surface 31 of the partition beam 3, and the uneven portion 53 is formed when the concrete is poured.
Embedded in the side surface 31 of When constructing the partition beam 3, the mold 52 having the unevenness on the molding surface is installed in the groove 4 together with the one 52 of the water-stop sheet 5, so that the one 52 of the water-stop sheet 5 is located in the underground part of the partition beam 3. It may be embedded in the side surface 31. In the present embodiment, one of the waterproof sheets 5 can be embedded and joined to the side surface 31 of the underground part of the partition 3 so that the waterproof sheet 5 can be firmly attached to the partition 3 without using an adhesive. In addition to the advantage of being able to adhere, the joining surface between the water-stop sheet 5 and the partition beam 3 has an uneven shape, so that there is an advantage that a higher water-stop performance can be secured as compared with the case where the water-stop sheet 5 comes into contact with a straight line.

[0014]

Third Embodiment FIG. 5 shows one of the waterproof sheets 5 52.
Is embedded in the side surface 32 of the ground portion of the partitioning beam 3. The present embodiment is different from the above-described second embodiment in that the side surface 32 of the partition beam 3 in which one of the water-stop sheets 5 is embedded.
Other basic structures are the same except for the position. In the present embodiment, in addition to obtaining the same advantages as those of the second embodiment, the embedding work of one of the water-stop sheets 5 can be performed simultaneously with the construction of the partition beam 3 on the ground side. There is.

[0015]

Fourth Embodiment The structure for stopping water between the partition beam 3 and the impermeable mat 6 constructed on the ground 2 on the slope of the embankment body has been described above. However, as shown in FIGS. As described above, the second embodiment can be applied as a waterproofing means between the foundation beam 7 and the impermeable mat 6 to be constructed on site. That is, after assembling the formwork with the water-stop sheet 5 positioned on the side of the groove 8 on the ground 2 side, concrete is poured into the formwork to construct the foundation beam 7 in which the water-stop sheet 5 is embedded. I do. After removal from the mold, the extra length 51 of the upper half of the water stop sheet 5 where the uneven portion 53 is not formed is peeled off and laid on the ground 2 side. The extra length 51 of the upper half of the separated waterproof sheet 5 is polymerized on the waterproof mat 6. 6 is a sheet pile, which is constructed integrally with the foundation beam 7. By constructing in this manner, water can be stopped between the foundation beam 7 and the impermeable mat 6. When a concrete beam (not shown) is to be constructed on the site in the direction perpendicular to the partitioning beam 1 in the middle of the ground 2 on the slope of the embankment, the space between the beam and the impermeable mat 6 is described above. You may apply the water stop structure of a form.

[0016]

As described above, the present invention has the following effects. <B> Since the water-stop sheet is wound around the bottom of the beam, it is possible to reliably prevent water permeation even if water enters between the beam and the water-stop sheet. Therefore, the reliability of the water stop between the partition beam and the water stop sheet is increased. <B> By embedding one of the waterproof sheets in the side surface of the beam, water can be reliably stopped between the beam and the waterproof sheet. <C> Since the work of applying the adhesive and the work of attaching the sheet can be omitted, it is possible to significantly reduce labor, shorten the construction period, and reduce the construction cost.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a water blocking structure between a partition beam and a water blocking sheet.

Fig. 2 Conceptual diagram of revetment using revetment blocks

FIG. 3 is a cross-sectional view taken along a line III-III in FIG. 2;

FIG. 4 is a cross-sectional view of a partition beam according to Embodiment 2 of the present invention.

FIG. 5 is a cross-sectional view of a partition beam according to Embodiment 3 of the present invention.

FIG. 6 is a cross-sectional view of a foundation beam according to a fourth embodiment of the invention.

FIG. 7 is an enlarged view of a part of FIG. 6;

FIG. 8 is an explanatory view of a conventional waterproof structure of a partition beam.

Claims (6)

(57) [Claims] 1. A water barrier mat is laid by a plurality of revetment blocks laying surface of the formed revetment, concrete beam body straddling the side surface of the plurality of revetment blocks are built, before Kisaegi water mat In the watertight structure of a seawall, on which a seawall is laid, a waterstop sheet is interposed between the groove opened in the ground and the beam constructed in the groove, and extends outside the groove. A watertight structure for a seawall, characterized in that a surplus length of the waterproof sheet and an end of the waterproof mat overlap, and the waterproof sheet continuously stops water between the waterproof mats. 2. A water barrier mat is laid by a plurality of revetment blocks laying surface of the formed revetment, concrete beam body straddling the side surface of the plurality of revetment blocks are built, before Kisaegi water mat In the watertight structure of a seawall where a seawall is laid, one of the waterstop sheets is continuously embedded along the side of the beam built in place at the site and the other of the waterstop sheet A watertight structure for a revetment, characterized in that the extra length of the seam overlaps with the end of the watertight mat and the waterstop sheet stops the water between the watertight mat and the side of the beam. 3. The water barrier structure of a revetment according to claim 2, wherein one of the water barrier sheets is embedded in the side surface of the beam located in the groove. 4. The water barrier structure of a revetment according to claim 2, wherein one of the water barrier sheets is embedded in a side surface of the beam exposed on the ground. 5. The water barrier structure of a revetment according to claim 2, wherein one of the water barrier sheets is embedded in the side surface of the beam body in an uneven shape. 6. The water-blocking structure of a revetment according to claim 1, wherein the water-blocking mat is constituted by attaching only a water-blocking sheet or a reinforcing mat to one surface of the water-blocking sheet. .