JP3453652B2 - Construction method of revetment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for constructing a revetment on a river or coast. 2. Description of the Related Art Conventionally, seawalls have been laid on slopes on the water surface side of embankments in order to protect embankments for seawalls formed on rivers and coasts. It has been known. In this kind of conventional revetment construction method, a bank is constructed by using a commercialized foundation block and a revetment wall to be laid on site (hereinafter referred to as an on-site revetment wall) or a commercialized revetment wall. A seawall has been built. As an example of the method of constructing the revetment, a method of constructing the revetment on the embankment A by applying the on-site revetment wall C to the commercialized foundation block B will be described with reference to FIGS. 6 to 9. Referring to the structure of the basic block B applied first, as shown in the plan view of FIG.
2 are bridged by the two side walls B3, B3 so that a part of both side ends of these walls B1, B2 becomes the protruding portions B11, B11, B21, B21, and the ready-mixed concrete input openings B4, B2 are formed.
5 are formed in the rear wall B2.
6 are formed, and a water blocking plate B7 having the same length as the rear wall B2 is buried in a horizontally protruding state.
A plurality of connection holes B31 and B31 are formed in 3 and B3. The basic block B will be described with reference to a cross-sectional view of FIG. 7 (Ea cross section in FIG. 6). Each of the walls B1, B2 and the connection hole forming a space B41 penetrating vertically and two spaces B51, B51. The rear wall B2 includes a side wall B3 having a vertical portion B23 and a horizontal portion B24.
22 and a corner B25 of the L-shaped concave strip B22.
A through hole B6 is formed with a required inclination angle, and a water blocking plate B7 is provided at a vertical portion B23 of the L-shaped concave ridge B22, and a part B71 of the front and rear width of the water blocking plate B7 is horizontal. It is buried perpendicular to the vertical portion B23 so as to protrude. Next, a method of constructing a revetment on the embankment A by using the basic block B having the above structure will be described with reference to FIG. 8 (plan view) and FIG. 9 (cross-sectional view). The foundation blocks B, B are sequentially laid in advance at predetermined positions on the embankment A by a crane, and each foundation block B,
The basic blocks B, B are connected by tightening nuts H, H of the connecting rods G, G having the side walls B3, B3 of B inserted into the connecting holes B31, B31 (see FIG. 8). And back wall B
The connecting bars B8, B8 are inserted and installed in the through holes B6, B6 of the L-shaped concave portion B22 in FIG. 2 so that both ends thereof protrude from the side wall B2, and the adjacent water stop plates B7, B7 are also provided.
The water blocking plate pieces B9, B9 are adhered and coated on the upper surfaces of the connecting portions of each other, and the spaces B41 and B2 are passed through the respective openings B4, B5.
The ready-mixed concrete is put into and filled with the two spaces B51, B51. Thereafter, reinforcing bars C1, C1, concrete casting frames and the like are laid along the slope of the embankment A with the L-shaped concave portion B22 as a base point, and the ready-mixed concrete is injected and solidified to form the on-site seawall C. To complete the desired revetment. [0004] However, in the conventional construction method relating to such a revetment, the water blocking plate B
The base blocks B, B having the projecting portions 7, 7 protruding therefrom are used, and a short overlapping water-stop plate piece B9 is attached to the upper surface of each of the connecting portions of the water-stopping plates B7, B7, and each of the connecting portions is connected to each other. It was designed to stop water and required a very long operation. In addition, natural forces such as earthquakes and waves over many years acted, and the relative displacement between the connection ends of many foundation blocks B There was also a risk that the water blocking plates B7, B7, which could not be stuck on the laminated water blocking plate piece B9, would also leak due to the formation of a gap, thereby reducing the revetment function. [0005] The present invention has been made in view of the problems of the conventional construction method relating to such a revetment, and it is necessary to attach a short and small overlapping water-stop plate piece to the upper surface of the connecting portions of the water-stop plate. The present invention provides a method for constructing a revetment that can easily attach a water stop plate without preventing water leakage from the connection ends of the base blocks B and B and that maintains the revetment function permanently. It is the purpose. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a base block provided with a gap for inserting a water stoppage plate and a space for charging ready-mixed concrete. A supporting base block having a height lower than that of the wall and being bridged by a girder piece with a rear wall having a protruding ridge at an upper portion, and forming a gap for water blocking plate insertion with the protruding ridge. A water blocking plate holding base block provided with a ridge and provided with means capable of being attached to the support base block is formed by being connected, and is continuously installed at a predetermined position, and is continuously installed. Continuously insert approximately half the width of the long water-stop board over each water-stop board insertion gap of each base block, and place the ready-mix concrete into the ready-mix concrete input space of the base block. Before solidifying, tie bars can be inserted inside the ready-mixed concrete And tie bars are inserted and fixed so that they protrude from the outer surface of the foundation block. The revetment construction method was adopted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a base block provided with a water blocking plate insertion gap and a ready-mixed concrete introduction space, wherein the base block has an upright front wall, a lower height than the front wall, and an upper portion. A supporting base block in which a rear wall provided with a projecting ridge portion is bridged by a girder piece; and a convex ridge portion forming a gap for water blocking plate insertion with the projecting ridge portion, and A waterproof block holding base block provided with a means attachable to the block is formed by being connected to the base block, which is continuously installed at a predetermined position, and each waterproof block is inserted into each of the continuously installed base blocks. Continuously insert approximately half the width of the long water-stop board over the gap for use, and place ready-mixed concrete in the ready-mixed concrete input space of the base block.
Insert and fix the tie bar so that it protrudes into the inside of the ready-mixer input space of the base block and the outer surface of the base block while the poured ready-mixed concrete does not solidify, and insert the tie bar into the base block where the tie bar and the water blocking plate protrude on the outer surface. The revetment is constructed by connecting the revetment walls so as to cover the tie bar and the water stoppage. An embodiment of the method for constructing a revetment according to the present invention will be described with reference to FIGS. 1 and 2, which show a method for constructing a revetment by hitting a revetment wall in-situ. FIG. 1 is a plan view showing a state in which foundation blocks 1 and 1 are installed before a seawall is hit on site.
One long waterproof plate 2 is stretched over and held by a number of basic blocks 1, 1 connected by nuts 3 and connecting rods 4 via the girder pieces 13, 13 at both ends in the longitudinal direction. In this basic block 1, the front wall 11 and the rear wall 12 are bridged by the girder pieces 13, 13, so that the openings R1, R1,.
It is composed of a support base block 1a on which R2 and R2 are formed, and a comb-shaped water blocking plate holding base block 1b in which a fixing reinforcing bar 111e is embedded. A tie bar 5 for connecting the foundation block 1 and the site protection quay wall C (see FIG. 9) is penetrated and held by the water blocking plate holding base block 1b. FIG. 2 is a cross-sectional view (including a partially enlarged cross-sectional view X) of the base block 1 of FIG. 1 showing a supporting base block 1a. An L-shaped concave portion 121 having a vertical portion 121a and a horizontal portion 121b is provided above the wall 11 at a height lower than the wall 11 and a tie bar (see a dotted line portion) at a corner 121c of the L-shaped concave portion 121. The upright rear wall 12 in which a through hole (see a dotted line portion) 121e for penetrating / holding 5 is formed with a required inclination angle is bridged by a girder piece 13 via reinforcing bars 6,6. Have been. Both ends of this girder piece 13 are L-shaped concave strips 121 on the front wall 11 and the rear wall 12.
, The upper end of the vertical portion 121a protrudes from the girder piece 13 to form a projecting ridge 122a. The other water blocking plate holding basic block 1b has a horizontally long piece 11b having a cutout 111b on the lower surface and a convex 112b formed by the cutout 111b, and a longitudinal direction of the horizontally long piece 11b. A plurality of support pieces 11c, 11c formed at predetermined intervals are formed in a comb-like shape, and the support pieces 11c, 11c have bolts (dotted line portions) for coupling with the beam pieces 13. 11d, 11d.
Are provided with insertion holes (see dotted lines) 111d, 111d, and a large number of fixing reinforcing bars 111e, 111e are buried at predetermined intervals in the longitudinal direction in the elongated piece 11b at one end thereof. Is held. Reference numeral 2 in the drawing indicates a single long water stop plate (see the dotted line portion) in which both edges in the longitudinal direction are bulging streak portions 2a, 2a, and this long water stop plate is shown. 2 is inserted about half a width through a gap I formed by the projecting ridge 122a of the vertical portion 121a of the L-shaped concave ridge 121 of the rear wall 12 and the convex ridge 112b of the water blocking plate holding base block 1b. . Here, referring to FIGS. 1 and 2,
The construction of a revetment using an on-site revetment is described. A predetermined base block 1 integrated with a seawall region formed in advance on a river or a coast by integrally connecting a support base block 1a to a support base block 1a by a bolt 11d (particularly, see a dotted line portion in FIG. 2). The numbers are laid adjacent to each other by a crane, and the beam members 13 at both ends in the longitudinal direction are appropriately connected to each other by a connecting rod 4 and a nut 3 through a through hole 132b. After this, these basic blocks 1,
1 protruding ridges 112b, 112b and protruding ridges 122a, 1
After approximately half the width of one long water-stop plate 2 is continuously inserted into the gap I between the holes 22a (see FIG. 2 in particular), the packing P
Bite. After the basic blocks 1 and 1 are laid adjacent to each other, the beam pieces 13 of the basic blocks 1 and 1
13, each opening R1, R1,
R2, R2 (see FIG. 1) is put into the field from above, and the through-hole (see the dotted line) 1 while the ready-mixed concrete does not solidify.
The tie bar (see the dotted line) 5 is inserted into 21e. By the introduction of the ready-mixed concrete, all the gaps H of the basic blocks 1 and 1 are filled up, and the fixing reinforcing bar 111e and a part of the tie bar 5 are buried and fixed. Subsequently, a reinforcing bar and a formwork are installed with the L-shaped concave portions 121, 121 of the base blocks 1, 1 as base points, and then ready-mixed concrete is put into the field to form a continuous revetment wall (conventional revetment wall). See Cast-in-place.). In the construction of the revetment described above, since only one waterproof plate is used, a series of operations is simplified, and water leakage from the joint between the basic blocks 1 and 1 is prevented. Considering that there is a limit to the length of one waterstop, it is most suitable for narrow seawalls. Further, the base block 1 is formed by connecting a comb-shaped water blocking plate holding base block 1b to a supporting base block 1a having a simple structure composed of a front wall 11, a rear wall 12, and a girder piece 13 with bolts 11d. The support base block 1a is reduced in weight, and the separability of the base blocks 1a and 1b enables improvement in workability such as transportation and construction. FIG. 3 is applied to the end joining between long waterstops, which is required when constructing a wide-area revetment foundation by utilizing the characteristics of the construction of the revetment foundation by the foundation block of the present invention. It is a perspective view showing other examples concerning a foundation block for a water stop board control. The water blocking plate holding basic block 10b for connecting the water blocking plate has substantially the same shape and shape as the comb-shaped water blocking plate holding basic block 1b as shown in FIGS.
Although it has the same structure, the concave notch 11 whose lower side is opened is provided at the end of the convex ridge 112b on the lower surface thereof.
4b is formed. As shown in the enlarged view W, the concave cutout portion 114b is formed by cutting out a part 113b of a thick portion of the protruding ridge portion 112b, and an overlapped end of a long water stop plate can be inserted. FIG. 4 is a view showing a state in which the long water stop plates 2 and 2 are connected to each other by applying the water stop plate holding base block 10b for connecting the water stop plate shown in FIG. Waterproof plate 2,
The two end portions 21 and 22 are mutually the base block 1 for holding the water stop plate.
In order to achieve an overlapping connection in the concave notch 114b of the base block 0b, a long water stop plate 2 is partly protruded from the end face of one of the base blocks 1 so as to protrude 21a, and the other base block 1 is held by the other base block 1. A long water stop plate 2 is partially 22 from the end face.
a is retracted and held. This protruding part 2
1a prevents water from leaking from the adjacent connecting portion C across the adjacent connecting portion C of the two basic blocks 1 and 1 and the connecting end surfaces of the long water blocking plates 2 and 2 by overlapping the ends 21 and 22. Even if they are separated from each other, no gap is easily formed in a range where the overlap is maintained, and water leakage from the connection end faces of the long water blocking plates 2 can be prevented. In order to construct a wide-area revetment foundation by employing the waterproof block holding base block 10b of FIG. 3, the foundation blocks 1, 1 are laid to match the length of one long waterproof plate 2. Then, the long water stop plate 2 is inserted. As shown in FIG. 1, the insertion of the single long water blocking plate 2 is achieved by pushing in from a side surface (direction of arrow D) of a series of base blocks 1 and 1 or an end surface of the rear wall 12 (direction of arrow E). That
At the end of the long water stop plate 2, a part 21 a of the long water stop plate 2 protrudes from the end face of the basic block 1 and is placed. Next, the base block 10b for holding the water stop plate is connected so that the part 21a occupies the concave cutout 114b provided in the base block 10b for holding the water stop plate for connecting the water stop plate. Is connected to the support base block 1a, and the base blocks 1, 1 are further laid and connected. Then, the other long water blocking plate 2 to be continuously connected is inserted after a part 22a of the end portion 22 is overlapped with the protruding portion 21a in the concave cutout portion 114b, and a packing is also inserted if necessary. I do. After that, the foundation blocks 1 and 1 and the long water stopping plate 2 and the like are laid, the ready-mixed concrete is driven into the foundation blocks 1 and 1 and solidified, and the revetment wall is continuously formed by casting in place. FIG. 5 is a cross-sectional view of another embodiment of a foundation block applied to the construction of a revetment in which an on-site revetment wall is employed, in which only a long water stop plate is applied. The basic block 1 has substantially the same shape and structure as the basic block 1 shown in FIG. 2, but includes the girder pieces 13 and 13 of the supporting basic block 1a and the comb-like basic block 1b for holding the water-stop plate. For example, a configuration in which a horseshoe-shaped spacer S is interposed is added between
13 through the insert 7 embedded in the bolt 13d,
11d is temporarily tightened, and the width of the gap I formed by the protruding ridge 122a of the vertical portion 121a in the L-shaped concave ridge 121 of the rear wall 12 and the convex ridge 112b of the water blocking plate holding base block 1b is Swelling edge 2a, 2a of long water stopping plate 2
Larger than the swelling thickness of Such foundation block 1 by applying to build a seawall sequentially continuously provided, laying the foundation block 1 in a predetermined area to be seawall, each gap I, I
Continuously insert the long water stop plate 2 in the direction (arrow D or E direction)
Lay it. Thereafter, the spacers S, S located between the girder pieces 13, 13 and the comb-like water-stop board holding base block 1 b are removed (in the direction of arrow G), and the water-stop board holding base block 1 b is removed. The bolts 11 d, 11 d are further screwed into the insert 7 to abut the beam pieces 13, 13 (in the direction of the arrow) to clamp the long waterproof plate 2. The holding action of the long water stopping plate 2 is caused by the vertical portion 12 of the L-shaped concave portion 121 of the rear wall 12.
1a protruding strip 122a and water blocking plate holding base block 1
b, and one of the bulging edges 2a, 2a is housed in the notch 111b to prevent the long water stop plate 2 from falling off from the seawall foundation. After sandwiching the long waterproof plate 2, as described above,
After the ready-cast concrete is driven into the basic blocks 1 and 1, the revetment wall is formed by casting in place. By adopting such a spacer S, the long water stop plate 2 can be easily inserted into the basic blocks 1 and 1, and the watertight function of the long water stop plate 2 can be enhanced. When constructing a wide-area revetment, as described above, the concave notch 114 having an open bottom at the end of the protruding ridge 112b on the lower surface.
The base block 10b (see FIG. 3) for connecting the water stop plate, on which the water stop plate b is formed, is used at the joint of the long water stop plates 2, 2. Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments.
Various changes in design may be made without departing from the spirit of the invention as set forth in the appended claims. In the embodiment of the present invention, the description is based on the premise that the revetment wall is laid on site. However, it is also possible to construct a revetment on the embankment A by using the commercialized revetment wall C. Although it is described that the water blocking plate holding basic block 10b for connecting the water blocking plate is adopted, a structure in which a concave cutout portion for inserting the water blocking plate is formed above the L-shaped concave portion in the supporting basic block. Can be adopted. Furthermore, although it is described that a concave cutout portion is formed at the end of the convex ridge on the lower surface of the waterstop plate holding base block for connecting the waterstop plate, the formation position of the concave cutout portion is for connecting the waterstop plate. It may be located at any part of the ridge on the lower surface of the water blocking plate holding base block, and various design changes are possible. According to the present invention, since a long water blocking plate is continuously inserted into a base block continuously installed at a predetermined position, water leakage at a connecting portion between the basic blocks is prevented. ,
In addition, there is no need to connect the water stop plates with each other using short and small water stop plates, and an efficient water stop plate laying operation can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an embodiment of the present invention and is a plan view showing an installed state of a foundation block before a pier is hit on site. FIG. 2 is a sectional view of the basic block of FIG. 1 as viewed from a roll. FIG. 3 is a perspective view showing another embodiment of a basic block for holding a water blocking plate in the present invention. FIG. 4 is a view showing a state in which long water stop plates are connected to each other by applying the water stop plate holding base block for connecting the water stop plate shown in FIG. 3; FIG. 5 is a sectional view of another embodiment of the basic block according to the present invention. FIG. 6 is a plan view of a conventional basic block. 7 is a cross-sectional view of the conventional basic block shown in FIG. FIG. 8 is a plan view for explaining a method of constructing a seawall on a dike by employing the conventional foundation block of FIG. 6; FIG. 9 is a cross-sectional view for explaining a method of constructing a revetment on a levee using the conventional foundation block of FIG. 6; [Description of Signs] 1 Basic block 1a Supporting basic block 1b Basic block for holding water stopping plate 2 Long water stopping plate 3 Nut 4 Connecting rod 5 Tie bar 6, 6 Reinforcing bar 7 Insert

Claims (1)

(57) [Claims 1] A base block provided with a gap for inserting a water stoppage plate and a ready-mixed concrete introduction space is provided with an upright front wall and lower than the front wall.
The rear wall, which is high and has a protruding strip at the top,
A support base block bridged by a girder piece;
Equipped with a ridge that forms a gap for inserting a waterproof plate with the ridge
And means capable of being attached to the support base block.
Formed by combining with the waterproof block holding base block.
Are continuously installed at predetermined positions, and approximately half the width of the long water-stop plate is continuously inserted across the gaps for inserting the water-stop plate of each of the base blocks that have been continuously installed, and the raw concrete The ready-mixed concrete is poured into the input space, and the tie bar is inserted and fixed so that it protrudes into the inside of the ready-mixed concrete input space of the base block and the outer surface of the basic block while the poured ready-mixed concrete does not solidify. When
Tie bars and waterstop in fresh concrete to the base block but projecting
Method for constructing a revetment, which comprises continuously provided a revetment wall to cover the bets.