JPH11181734A - Precast coping concrete for sheet pile revetment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with the driving and curing processes, to dispense with scaffoldings and molds above the water level, and to dispense with dangerous processes by precedingly placing a base concrete on a bank side to a top end of a steel sheet pile wall, setting a coping concrete block thereon, and connecting it by bolts. SOLUTION: A foundation material 11 is executed on a bank side of a steel sheet pile wall 2, a base concrete 3 is placed at site, and a coping concrete block 1 is set thereon. An upper surface of the base concrete 3 is agreed with a top end of the steel sheet pile wall 2, and a step 9 is formed on the end of the bank side. The base concrete 3 is of reinforced concrete structure where main steel reinforcements of the required amount are arranged together with appropriate distribution reinforcements in the extending direction of the steel sheet pile wall 2, and high-tension nuts 4 having anchors are embedded therein. The coping concrete block 1 and the base concrete 3 are connected to the high-tension nuts 4 having anchors by bolts in a joining port 15 through a washer a necessary parts, and mortar is filled therein to complete the installation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the construction of self-supporting type and tie-rod type steel sheet pile wall head shank concrete installed on embankments, etc. in rivers to cope with disaster recovery by speeding up construction work and to improve the embankment of embankments. It relates to precast cast concrete for revetment of steel sheet piles that is suitable for landscapes.

[0002]

2. Description of the Related Art Conventionally, shaping concrete for a steel sheet pile wall has been carried out by assembling a formwork at a site, providing necessary reinforcement, pouring concrete, and disintegrating the formwork after curing and curing. As an improvement method, for example, Japanese Utility Model Laid-Open No. 7-290
11 also uses precast concrete.

[0003]

The conventional cast-in-place method is disadvantageous in that the construction period, such as temporary work, formwork, reinforcing steel, concrete placement and curing, is prolonged. In order to install it, there was a drawback that unsafe work on the water surface was not eliminated because a bottom plate was required on the river side. Furthermore, the precast concrete has a hollow structure in which the arrangement of reinforcing bars is deviated, the main reinforcing bars in the extending direction are not continuous, and there is also a problem that the finished surface and the finished surface are not uniform in appearance.

According to the present invention, a solid structure is used in the method of precast concrete, no concrete filling is required, the necessary portions of the main reinforcing bars are continuous in the extending direction, and the danger is eliminated by eliminating the work of scaffolding on the water surface during construction. The purpose is to obtain a construction method in which the rear exposed surface is uniformly finished and the landscape processing is formed evenly by precasting.

[0005]

In order to achieve the above object, in the precast shading concrete method of the present invention, the base concrete on the embankment side is cast to the top of the steel sheet pile, and in this case, the end of the embankment side is lowered by one step. Steps. For the main reinforcement in the extension direction, the necessary amount of the entire caster concrete is placed in the cast-in-place base concrete. The precast cast block concrete block is a solid body with no hollow openings in the entire upper part from the river side and the upper end of the steel sheet pile wall.The lower part near the side of the embankment is hooked and combined with the base concrete step I have.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a base concrete on a levee side is pre-installed by arranging a main reinforcing bar extending in a direction extending to a top of a steel sheet pile, and a hook of a precast shank concrete block body is engaged with a step of the base concrete. The concrete block is constructed in such a way that it is built in such a way that the shape and dimensions of the precast cast concrete block are provided in accordance with the deformation of the steel sheet pile and the extension of the joint. In addition, since the steel sheet pile has a large deformation and elongation in the direction of the seawall extension, the length of one precast concrete block is usually adjusted to 2-3 units of irregularities of the steel sheet pile wall, for example, 1.6 m, 2.4 m.
And so on.

In addition, the length is 1.6 m for curved construction,
It is preferable to use a unit corresponding to the steel sheet pile wall, such as 2.4 m.
The fixing between the base concrete and the precast shading concrete block is performed by bolting or welding using a flange or a plate, in addition to connecting the anchored nut of the base concrete with a bolt.

In the installation of the precast concrete block, the street and level adjustments are made on both sides of the center of gravity of the concrete block and fixed.

[0009]

An embodiment of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 show a state in which a cap concrete block (1) is installed along the head of a steel sheet pile wall (2). First, a foundation material (11) is placed on the embankment side of the steel sheet pile wall (2). After the base concrete (3) is cast in place, the shade concrete block (1) is set. The upper surface of the base concrete (3) is aligned with the top end of the steel sheet pile wall (2) as shown in FIGS. The base concrete (3) is a reinforced concrete structure in which a necessary amount of main reinforcing bars (7) are arranged in the direction of extension of the steel sheet pile wall along with appropriate force bars, and in this embodiment, a high nut with anchors (4) is embedded. Have been. In addition, using the base concrete block (3 ') shown in Fig. 6, the joints shall be welded together to make the protruding main reinforcing bars (7) continuous, filled with mortar or concrete, and the whole shall be installed in precast concrete. Can also.

As shown in FIG. 3, the cap concrete block (1) is a precast concrete of a fixed length composed of a river side (1a) and an upper part (1b), and the inside of the river side (1a) is It has an uneven shape substantially corresponding to the steel sheet pile wall (2) surface. Further, a hook (8) corresponding to the step (9) of the base concrete is formed along the longitudinal direction at the side of the embankment on the upper part (1b), and in this embodiment, a high nut (4) with an anchor of the base concrete is used. (15) Joint for fixing bolts
The steel sheet pile wall (2) is set along the river side of the head as shown in FIGS. 1, 2, 4, and 5, and is engaged with the step (9) of the base concrete (3). It is installed in a state where it has been done. Then, as shown in FIGS. 1, 2, and 4, a high nut (4) with an anchor is connected between a concrete block (1) and a base concrete (3) by a bolt (6) via a washer (5) at a joint (15). And mortar (16) is filled to complete the installation. In addition, it is also possible to form the upper surfaces of the base concrete (3) and the base concrete block (3 ') flat without any step, and omit the hook (8) from the concrete cover (1). It is easy to fit in curved construction of steel sheet pile wall (2).

When the concrete block (1) is installed, a mortar (10) is laid on the upper surface and the step surface of the base concrete (3) as shown in FIGS. Is good. Furthermore, as shown in FIGS. 1, 2 and 5, the shape and dimensions of the river side portion (1a) of the shank concrete block are determined by the steel sheet pile wall (2).
It is preferable to set in advance so as to form a play of about 1 to 5 cm with the other concave portions in contact with the convex portions of the surface, and to suit the on-site construction. FIG. 7 shows an example of the installation of the shank concrete block (1) on the tie rod retaining steel sheet pile wall. In this case, the shank concrete block corresponds to the head of the tie rod (18) and the bulge (17). A recess (20) is formed.

[0012]

Since the present invention is configured as described above, it has the following effects.

The precast shade concrete block is a solid body without any concrete filling, omitting the conventional driving and curing steps, and achieving a uniform quality.

[0014] A scaffold on the water surface and a formwork are not required, and many dangerous steps can be omitted.

The exposed surfaces after completion are all finished with precast surfaces, and are not affected by construction conditions such as climate, so that uniformity and a special landscape finish can be obtained.

[0016] When the main reinforcing bars of the base concrete are continuous, the strength in the extension direction is ensured.

By omitting the filling process of cast-in-place concrete, labor saving and mechanical construction can be achieved, and the process can be shortened to meet urgent river disaster restoration and disaster prevention construction.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view from the river side showing an embodiment.

FIG. 2 is a cutaway perspective view from an embankment side showing an embodiment.

FIG. 3 is a partially cutaway perspective view of a shade concrete block.

FIG. 4 is a sectional view taken along the line AA ′ of FIG. 2;

FIG. 5 is a sectional view taken along the line BB 'of FIG. 2;

FIG. 6 is a perspective view of a base concrete block.

FIG. 7 is a sectional view in the case of a tie rod retaining steel sheet pile wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shed concrete block 1a Shed concrete block river side 1b Shed concrete block upper part 2 Steel sheet pile wall 3 Base concrete 3 'base concrete block 4 High nut with anchor 5 Washer 6 Bolt 7 Main reinforcing bar 8 Hook 9 Step 10, 16 Mortar 11 Foundation Material 12 Back soil 13 Water surface 14 Play 15 Joining port 17 Prong 18 Tie rod 19 Swivel joint 20 Recess

Claims (4)

[Claims] 1. A base concrete (3) on the embankment side is preliminarily cast to the top of a steel sheet pile wall (2), and a shank concrete block (1) is set and connected by bolts (6) or the like. Construction method. 2. A base concrete (3) on the side of the embankment is pre-cast to the top of the steel sheet pile wall (2), and a step (9) is formed one step lower, and then a cap concrete block (1) is set. A method in which the step (9) and the hook (8) of the base concrete are engaged and installed. 3. A base concrete (3) on the embankment side is pre-cast to the top of the steel sheet pile wall (2), a step (9) is formed one step lower, and a hook (8) is connected to the step (9). Precast shade concrete block (1) that is to be installed by engaging. 4. The method according to claim 1, wherein the installation is performed using a base concrete block (3 ').