JP3301966B2 - Shade concrete block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap concrete block used for constructing a cap concrete on an upper part of a sheet pile wall in revetment work on a riverbank, a seashore, or the like.

[0002]

2. Description of the Related Art Conventionally, in the case of bank protection of river banks, shores, and the like using steel sheet piles, the purpose is generally to prevent corrosion of upper portions of steel sheet piles continuously laid along the river banks and to improve the landscape. Shade concrete is provided.

As a method of constructing the cap concrete on the upper part of the steel sheet pile, for example, there is a method as shown in FIGS. Referring to the drawings, first, as shown in FIG. 6, steel sheet piles 01 continuously driven along the river banks.
The opening 0 is located on the land A side of the steel sheet pile wall 011 formed by
3, a front plate 05 hanging down from the front end of the top plate 04, and a steel sheet pile 01 side projecting horizontally rearward from the lower end of the front plate 05 and having a leading end formed by articulation. Bottom plate 0 having uneven portions 06 that can be inserted into the uneven portions
7 and a rear side plate 08 for supporting the rear portion of the top plate 04 of the cap concrete block 02 composed of
A support means 010 is provided on the upper end of the steel sheet pile 01.

[0004] Next, as shown in FIG. 6, the shade concrete block 02 constructed as described above is suspended by a crane (not shown) or the like, and steel is supported so as to be supported via the support means 010 and the rear side plate 08. It is laid in the longitudinal direction of the upper end portion of the sheet pile wall 011 and the adjacent concrete block 0
2 and the rear part of the top plate 04 of the shade concrete block 02 and the upper part of the rear side plate 08 are connected. After the coping concrete block 02 is connected to the upper end of the steel sheet pile 01 in this way, fresh concrete is poured from the opening portion 03 of the coping concrete block 02, and the raw concrete is cured to construct the coping concrete of the steel sheet pile wall. Complete.

[0005]

However, in the case of constructing a capping concrete using such a capping concrete block, when ready-mixed concrete is poured into the capping concrete block 02, it flows from the steel sheet pile 01 to the river B side. When the load of the prepared concrete is applied to the bottom plate 07, the center of gravity of the cap concrete block is biased toward the front plate, so that the rear part of the top plate 04 of the cap concrete block 02 is pushed up, and the connection with the rear plate 08 is opened. As a result, there is a risk that the ready-mixed concrete leaks out of that portion, or that the cap concrete block 02 deviates from the upper end of the steel sheet pile wall 011.

Therefore, a method may be considered in which the lower surface of the bottom plate 07 is supported from below by a support fitting 09 (see FIG. 7) fixed to the steel sheet pile 01 until the ready-mixed concrete is cured. Since the steel sheet pile 01 is located on the river B side of the steel sheet pile 01, there is a problem that it is difficult to fix the support metal fittings 09, it is dangerous, and it is exposed to the outside after the construction and the scenery is damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a shank concrete block of a steel sheet pile wall capable of easily and safely constructing a shank concrete is provided at the upper end of the steel sheet pile wall. It is intended to provide.

[0008]

In order to solve the above-mentioned problems, a concrete cap block of the present invention is provided so as to surround an upper periphery of a steel sheet pile wall constructed by continuously driving steel sheet piles. A cast concrete block capable of forming cast concrete on the upper part of the steel sheet pile wall by casting fresh concrete into the inside thereof, the whole being made of precast concrete integrally formed in a substantially cylindrical shape, An opening is formed in the portion, and the bottom portion has a shape substantially the same as the upper cross-sectional shape of the steel sheet pile wall.
A groove portion through which the upper portion of the formed steel sheet pile wall can be inserted is formed so as to divide the bottom surface portion into left and right sides in the longitudinal direction, and the upper portion of the steel sheet pile wall is inserted into the groove portion. It is characterized in that it can surround the upper part of the wall. According to this feature, since the cap concrete block is integrally formed in a tubular shape, if the upper part of the steel sheet pile wall is inserted into the groove, the block is not assembled at the site, and the left and right sides of the steel sheet pile wall in the longitudinal direction are not assembled. The bottom part is arranged in each block so that ready-mixed concrete can be held inside the block.
In addition to reducing the inclination of the rack, simplifying the construction process and improving the overall strength, it is possible to easily build a strong cap concrete at the upper end of the steel sheet pile wall.

[0009]

[0010] In the cap concrete according to the present invention, it is preferable that the bottom portion is substantially equally divided into the left and right sides in the longitudinal direction of the cap concrete block by the grooves. By doing in this way, the load of the ready-mixed concrete that has flowed into the shank concrete block is almost equally applied to the bottom portions on the left and right sides in the longitudinal direction of the steel sheet pile wall,
The center of gravity is less likely to be biased, and the stability is further improved. Therefore, the shade concrete block does not easily tilt or deviate until the ready-mixed concrete hardens.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a concrete block according to the present invention; FIG.
Is a block made of precast concrete integrally formed in a square tubular shape from the top plate 4, the front plate 5, the rear plate 6, and the bottom plate 7 on which are formed. As shown in FIG.
As shown in FIG. 2, a groove 8 which is formed by continuously driving a plurality of steel sheet piles 1 and which can be inserted into an upper portion of a steel sheet pile wall 10 is formed in a wavy shape in the longitudinal direction, and has approximately the same area. A bottom plate 7a continuously provided from the front side plate 5 having
It is divided into a rear plate 6 and a bottom plate 7b continuously provided.

The groove 8 is formed along the upper edge of the steel sheet pile wall 10 constructed in various shapes, and can be variously deformed according to the shape of the steel sheet pile wall. .

FIG. 2 shows a plurality of steel sheet piles 1 along the riverbank.
Is shown in a state in which the cap concrete block 2 is continuously provided on the upper part of the steel sheet pile wall 10 formed by continuous casting, and the left side is the land A side and the right side is sandwiching the cap concrete block 2 in the figure. Is on the river B side.

Reference numeral 11 in FIG. 2 denotes a support means for supporting the lower surface of the top plate 4 when the concrete block 2 is placed on the upper end of the steel sheet pile wall 10 as will be described later. As shown in FIG. Nut 11a fixed to the upper end of steel sheet pile 1
And a bolt 11b screwed into the nut 11a. Since the bolt 11b has a predetermined length and can be adjusted in height, even if the height position of the upper end of the steel sheet pile 1 continuously cast along the river bank is different, With the plurality of bolts 11b, the cap concrete block 2 can be placed in a substantially horizontal state in the front-rear and left-right directions.

Next, the procedure for constructing the concrete for the sheet pile wall using the concrete block 2 constructed as described above will be described with reference to the drawings.

First, as described in the prior art, a plurality of steel sheet piles 1 are continuously driven along a river bank so as to be connected to each other, thereby constructing a steel sheet pile wall 10 at the time of revetment work of a riverbed or the like. I do.

Next, a support means 11 for supporting the lower surface of the top plate 4 of each cap concrete block 2 is attached to the upper end of a predetermined steel sheet pile 1 in correspondence with the cap concrete block 2, and the upper end of each bolt 11b is provided. Is set at a predetermined height position in advance. In this embodiment, the nut 11a is a steel sheet pile 1
Is fixed to the upper end portion by welding, but the fixing method may be performed by a method other than welding.

Then, the cap concrete block 2 is lifted by a tow rope for each block 2 (for example, see FIG. 6) and moved to the upper portion of the steel sheet pile wall 10, and then the steel sheet pile is inserted into the groove 8 of the concrete block 2. When the upper part of the wall 10 is lowered so as to be inserted, the lower surface of the top plate 4 of the cap concrete block 2 is supported by the support means 11 and laid on the upper end of the steel sheet pile wall 10 (see FIG. 3). At this time, the periphery of the upper part of the steel sheet pile wall 10 is surrounded by the shade concrete block 2.

In this embodiment, as shown in FIG. 3, a spacer 9 made of rubber or the like is previously provided on the distal end surface 7a 'of the bottom plate 7a located on the river B side of the steel sheet pile wall 10 of the shank concrete block 2. It is fixed. The spacer 9 is brought into contact with the side surface of the steel sheet pile wall 10 at the time of laying, so that concrete can be prevented from flowing out from the gap between the tip end surface 7a 'and the side surface of the steel sheet pile wall 10, and the spacer 9 The shock is absorbed to prevent the concrete block 2 from being damaged.

Next, as shown in FIG. 4, ready-mixed concrete is poured into the shade concrete block 2 through the opening 3. Here, land A side, river B across steel sheet pile wall 10
The ready-mixed concrete flowing into the side is a bottom plate 7b,
a, each bottom plate 7a,
A substantially uniform load is applied to 7b. Therefore, the center of gravity of the cap concrete block 2 is deviated toward the land A or the river B due to the load of the ready-mixed concrete, so that the cap concrete block 2 does not tilt or deviate from the upper end of the steel sheet pile wall 10.

Further, even if the center of gravity of the cap concrete block 2 is deviated toward the land A or the river B, the tip surface of the bottom plate 7a or 7b is abutted against the side surface of the steel sheet pile wall 10 so that the cap concrete is prevented. The inclination of the block 2 and the deviation from the upper end of the steel sheet pile wall 10 are prevented.

Finally, as shown in FIG. 5, after the ready-mixed concrete is filled in the shade concrete block 2, the ready-mixed concrete in the opening 3 is leveled, and the ready-mixed concrete is cured. Then, after the ready-mixed concrete is hardened, earth and sand are stacked on the land A side up to a position substantially equal to the upper surface of the top plate 4 of the shade concrete block 2, and concrete is cast on the upper surface to form a concrete layer or the like. This completes the construction of the shade concrete.

As described above, the cap concrete block 2
The upper portion of the steel sheet pile wall 10 can be easily surrounded by merely inserting the upper portion of the steel sheet pile wall 10 into the groove. Can be easily constructed. Moreover, since the load of the ready-mixed concrete poured into the interior is applied to each of the land A side and the river B side with the steel sheet pile wall 10 interposed therebetween, the cap concrete block is inclined,
There is no easy deviation from the upper end of the steel sheet pile wall 10.

Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions without departing from the gist of the present invention, the present invention will be described. Included in the invention.

For example, the cap concrete block in this embodiment is formed in a substantially rectangular tube shape, but the shape is not particularly limited, and can be variously deformed, such as a substantially cylindrical shape and a polygonal shape. .

[0026]

The present invention has the following effects.

(A) According to the first aspect of the present invention, since the cap concrete block is integrally formed in a tubular shape,
If the upper part of the steel sheet pile wall is inserted into the groove, the bottom part is arranged on the left and right sides in the longitudinal direction of the steel sheet pile wall without assembling the block at the site, so that the ready-mixed concrete can be held inside the block, Shade concrete
Not only the inclination of the lock is suppressed and the construction process is simplified, but also the overall strength is improved, so that a strong cap concrete can be easily constructed at the upper end of the steel sheet pile wall.

(B) According to the second aspect of the present invention, the load of the ready-mixed concrete that has flowed into the concrete block is substantially evenly applied to the left and right bottom surfaces in the longitudinal direction of the steel sheet pile wall. It is less likely to be biased, and the shade concrete block is less likely to tilt or deviate until the ready-mixed concrete hardens.

[0029]

[0030]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a shade concrete block as an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which the cap concrete block of FIG. 1 is laid on an upper end portion of a steel sheet pile wall.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a cross-sectional view showing a state where ready-mixed concrete is poured into the shade concrete block of FIG.

FIG. 5 is a cross-sectional view showing the shade concrete after completion of construction.

FIG. 6 is a perspective view showing a construction state of a conventional shade concrete block.

FIG. 7 is a cross-sectional view showing a state in which a conventional shade concrete block is laid at the upper end of a steel sheet pile wall.

[Description of Signs] 1 Steel sheet pile 2 Shade concrete block 3 Opening 4 Top plate (upper part) 5 Front side plate 6 Rear side plate 7, 7a, 7b Bottom plate (bottom part) 7a 'Tip surface 8 Groove 9 Spacer 10 Steel sheet pile wall 11 Support member 11a Nut 11b Bolt A Land side B River side

Claims (2)

(57) [Claims] 1. A steel sheet pile wall constructed by continuously casting steel sheet piles is provided so as to surround the upper periphery of the steel sheet pile wall. A shade concrete block capable of forming concrete, the entirety of which is made of precast concrete integrally molded in a substantially cylindrical shape, an opening is formed on an upper surface thereof, and a steel sheet pile wall is formed on a bottom surface thereof. Approximately the same as the upper cross section
A groove portion through which the upper portion of the steel sheet pile wall formed in the same shape can be inserted is formed so as to divide the bottom portion into left and right sides in the longitudinal direction, and the upper portion of the steel sheet pile wall is inserted into the groove portion. Shade concrete block characterized by being able to surround the upper periphery of the steel sheet pile wall. 2. The cap according to claim 1, wherein the bottom portion is formed by the groove.
Almost equally distributed on the left and right sides in the longitudinal direction of the concrete block
The shade concrete block according to claim 1, which is split .