JP2001011839A - Imitation rock block to be installed next to side surface on land side of offshore breakwater and imitation quay constructed thereby - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imitation rock block capable of facilitating construction work for an imitation quay adjacent to an offshore breakwater. SOLUTION: Every face of an imitation rock block 5 is formed in a rock graining pattern like a natural rock internally touched to reference planes S and E in places on the basis of four side faces S of a square pillar body having a rhombic cross section and two end faces E, i.e., it is formed in an uneven-shape without giving any artificial impression to people to the utmost. An acute angle B, i.e., a gradient made by the adjoining side faces of the rhombic cross section of the squre pillar body on the basis of the imitation rock block 5 is common to a gradient of the side face of an offshore breakwater, i.e., an inclination α.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pseudo rock block to be installed adjacent to a land side surface of a detached shore and a pseudo rock wall constructed thereby.

[0002]

2. Description of the Related Art A breakwater is installed along a coastline at a relatively short distance from the coastline in order to prevent erosion of the coast by waves. This offshore levee is generally constructed by laying rubble foundations on the seabed and stacking wave-dissipating blocks on top of it. A typical example of this wave-dissipating block is a tetrapot.

[0003]

A detached shore with stacked wave-dissipating blocks has an extremely artificial appearance.
It has been pointed out that the surrounding natural scenery has been seriously harmed.In addition, it has been reported that bathers and anglers slipped or were sucked into the gap between adjacent wave-dissipating blocks. ing.

[0004] In order to improve such a situation, the applicant of the present invention, in a registered utility model registration No. 3025485, has piled up a landscaped rock, that is, a pseudo-rock made of concrete, on the land side surface of a detached bank. It was proposed to build a pseudo rock wall.

An object of the present invention is to provide a utility model registration 30
An object of the present invention is to provide an improvement of a pseudo rock wall proposed in Japanese Patent No. 25485, specifically, to provide a pseudo rock wall for offshore quay which can facilitate construction work of a pseudo rock wall, and a pseudo rock wall using the same. . A further object of the present invention is to provide a quay rock block for offshore piers that can create a variety of surface properties as a whole by making only a few types of quasi rock blocks in addition to facilitating the construction of the quasi rock wall described above. Is to provide.

[0006]

According to the present invention, there is provided a pseudo-rock block for forming a pseudo-rock wall adjacent to a land side of a detached shore, according to the present invention. Achieved by providing a pseudo-rock block characterized by having an uneven shape of natural rock formed on the basis of each surface of a rectangular parallelepiped prism having an acute angle corresponding to the inclination angle of the side surface . That is, according to the pseudo rock block of the present invention, the pseudo rock block is used to construct the pseudo rock wall adjacent to the land side surface of the detached shore just by stacking the pseudo rock blocks in a state where the sides of the pseudo rock blocks are vertically overlapped. can do. Also, at the time of installation, simply changing the direction of the pseudo rock block, in other words, by appropriately selecting the side facing the land side of the pseudo rock block, it is possible to change the unevenness of the land side surface of the pseudo rock wall It is possible to dilute the artificial impression by making only a few types of artificial rock blocks.

Further, according to a preferred embodiment of the present invention, the irregularities of natural rock formed on the basis of each surface of a prism having a rhombic cross section having an acute angle corresponding to the inclination angle of the land side surface of the detached shore. A pseudo rock block characterized by having a shape is provided. By forming a pseudo rock block based on a prism having a rhombic cross section, and turning one of the four sides toward the land side, the unevenness of the land side surface of the pseudo rock wall can be further changed. By simply making different types of pseudo rock blocks, pseudo rock walls with various surface properties can be easily constructed. Other objects and effects of the present invention will become apparent from the following description of preferred embodiments of the present invention.

[0008]

FIG. 1 shows an example in which a pseudo rock wall 2 according to the present invention is applied to a detached shore 1. The pier 1 is constructed by randomly stacking tetrapods. In the drawings, the outer contour of the pier 1 is depicted, and the individual components of the tetrapod, which is a component thereof, are not shown. Also,
The detached shore 1 is constructed on a rubble foundation installed on the seabed 3, but the rubble foundation is the same as the conventional one, so that illustration thereof is omitted.

The offshore shore 1 is not limited to a tetrapod as a component, and the land side 1a and the sea side 1b, both of which are imaginary surfaces, are inclined even if other wave-dissipating blocks are employed. Are usually constructed to form
The shore 1 has a land side 1a and a sea side 1b.
Both have a gradient of 1: 4/3, that is, the inclination angle α, and as a result, the detached shore 1 has a virtual trapezoidal cross section as can be understood from FIG.

As can be understood from FIG. 1, the pseudo rock wall 2 according to the present invention is constructed by stacking the pseudo rock blocks 5 and is arranged adjacent to the land side surface 1a of the detached pier 1. Note that reference numeral SW in FIG. 1 indicates a sea surface.

2 to 4 are detailed views of the pseudo rock block 5. FIG. Here, FIG. 2 is a side view of the pseudo rock block 5 according to the present invention viewed from the side, FIG. 3 is a plan view of the pseudo rock block 5 viewed from the direction of arrow III in FIG. 2, and FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG.

The artificial rock block 5 is preferably made from concrete using a formwork at a construction site or a nearby factory, and a colorant is added to the concrete to be used so as to give a natural rock color. Is preferred. When designing the formwork for the artificial rock block 5, the surface similar to natural rock is formed by adding rock surface irregularities such as natural rock to this reference surface with respect to each surface of the prism having a parallelogram cross section. A pseudo rock block 5 is formed.

In a preferred embodiment of the present invention, as shown in FIG. 2, four sides S (FIG. 2) and 2
Based on the two end faces E (FIG. 3), a rock surface pattern similar to natural rock, inscribed in some places with respect to the reference planes S and E, that is, an uneven shape that does not give an artificial impression to the viewer as much as possible is formed. By doing so, a pseudo rock block 5 composed of a substantially prismatic body having a substantially rhomboidal cross section having a random uneven profile on each surface is produced.
As shown in FIG. 2, the pseudo rock block 5 most preferably has four side surfaces 5 a to 5 d having different uneven shapes. In addition, artificial rock block 5
It is preferable that both end surfaces 5e and 5f have different uneven shapes.

The specific specifications of the pseudo rock block 5 are as follows. (1) Overall length L of a prism having a rhombic cross section serving as a reference: 2060
mm (2) The width W of the side surface of the reference prism having a rhombic cross section: 14
60 mm (3) The acute angle β formed by the adjacent side faces of the reference prismatic rhombic cross section, ie, the gradient is 1: 4/3. (4) The height of the reference prismatic rhombic cross section H: 880 mm (6) Own weight: 6 tons As can be seen from the above specifications, the pseudo rock block 5 is
Acute angle β formed by adjacent side surfaces 5a and 5b and 5c and 5d
That is, the inclination angle of the side surface of the pseudo rock block 5 is common to the inclination angle α of the side surface 1a of the detached shore 1.

In order to construct the artificial rock wall 2, first, the detached shore 1
A foundation (not shown) is made of rubble on the sea floor adjacent to the land side surface 1a, and a pseudo rock block 5 is placed horizontally thereon using a crane (not shown). In this installation work, the installation work is performed while paying attention so that the side surfaces and the end surfaces of the pseudo rock block 5 overlap with each other along the side surface 1a of the detached bank 1. As a result, the pseudo rock wall 2 constructed along the land side surface 1a of the detached shore 1 has the side of the pseudo rock block 5 located below and the side of the pseudo rock block 5 thereover vertically overlapping each other, and the pseudo rock blocks arranged side by side. With regard to, the end faces face each other. By this series of operations, the pseudo rock blocks 5 are stacked diagonally along the slope of the side surface 1a of the detached shore 1.

The pseudo rock blocks 5 constituting the pseudo rock wall 2 may be stacked in multiple stages just enough to cover the land side surface 1a, and in the embodiment shown in FIG. Of course, when determining the specific dimensions of the pseudo rock block 5 at the design stage, the height of the target pier and the inclination angle α of its land side are measured, and the The slope angle β of the pseudo rock block 5 is set in common with the slope angle α of the stake, and each of the pseudo rock blocks 5 is set so that the land side surface of the detached shore can be covered exactly by stacking an appropriate number of steps. The dimensions may be determined. Also, as in the embodiment shown in FIG. 1, pseudo rock blocks 5 are arranged in three rows at the lower part of the pseudo rock wall 2, and two pseudo rock blocks 5 are arranged at the upper part of the pseudo rock wall 2.
You may arrange in a line. The number of arrangements of the pseudo rock blocks 5 toward the land is arbitrary.

In order to construct the pseudo rock wall 2 most efficiently and economically, the pseudo rock block 5 having a substantially rhombic cross section is adopted, and the four side surfaces 5a to 5d are provided with different uneven shapes, and both end surfaces 5e, As for 5f, it is preferable to make one kind of the pseudo rock block 5 having different uneven shapes. Then, when building up the pseudo rock wall 2 by stacking them, it is preferable to stack and arrange them while being careful that side surfaces of the same shape are not continuous in the same direction. In other words, when arranging the pseudo rock block around the already installed pseudo rock block 5, the mold for making the pseudo rock block 5 is formed by carefully installing the pseudo rock blocks 5 so that the different sides face the land side. By just making one, it is possible to make a pseudo rock wall 2 having a random surface texture, not a geometric appearance. Of course, if pseudo rock blocks 5 having two or more types of different uneven shapes are made, it becomes easier to form random unevenness on the side surface of the pseudo rock wall 1.

The pseudo rock blocks 5 forming the longitudinal end faces of the pseudo rock wall 2 are also provided with a plurality of pseudo rock blocks 5 by turning an end face different from the end face of the adjacent pseudo rock block 5 to the outside or changing the direction of the end faces. Can be given a random surface property to the entire end face of the pseudo rock wall 2 composed of the end face of.

The artificial rock wall 2 installed adjacent to the pier 1 is required to have a function of discharging seawater passing through the pier 1 to the land side. This function is performed by the gap formed between the concavo-convex surfaces of the adjacent pseudo rock blocks facing each other. Therefore, the size of the irregularities on the surface of the pseudo rock block 5, the depth of the concave portion, the shape and the arrangement position thereof may be determined so as to sufficiently exhibit this function.

With respect to the water permeability of the pseudo rock wall 2, if necessary, as shown in FIGS. 5 and 6, the frame of the pseudo rock block 5 may be provided with a plurality of through-holes 7 which are opened on the side surfaces facing each other. Good. As a result, the flow of seawater between the sea side and the land side across the shore 1 is performed through the through hole 7 in addition to the gap between the adjacent pseudo rock blocks 5.

The pseudo rock wall 2 adjacent to the quay 1 does not mechanically connect or connect a plurality of pseudo rock blocks 5 constituting the same, but merely stacks the pseudo rock blocks 5. . Therefore, the adjacent pseudo-rock blocks 5 and 5 move relative to each other due to the wave force applied to the pseudo-rock block 5, but the surfaces of the pseudo-rock blocks 5 and 5 that abut each other are the same as natural stone masonry. Since the surface is composed of irregularities with no regularity, adjacent pseudo rock blocks will be entangled with each other while moving relative to each other according to the wave force, creating a stable state,
There is no fear that the pseudo rock wall 2 will collapse.

The case where the pseudo rock wall 2 is installed along one side surface of the pier 1 has been described above. However, depending on the surrounding topography, both sides of the pier 1 face the land. In the meantime, the pseudo rock wall 2 may be constructed on both sides of the detached shore, respectively, adjacent thereto.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an example in which a pseudo rock wall according to the present invention is constructed along a land side surface of a detached shore.

FIG. 2 is a side view of a pseudo rock block according to the present invention.

FIG. 3 is a plan view of the pseudo rock block according to the present invention viewed from a direction indicated by an arrow III in FIG. 2;

FIG. 4 is a sectional view of the pseudo rock block taken along the line IV-IV in FIG.

FIG. 5 is a side view corresponding to FIG. 2 of a modified example of the pseudo rock block according to the present invention.

FIG. 6 is a plan view corresponding to FIG. 3 of the pseudo rock block shown in FIG. 5;

[Explanation of symbols]

 Reference Signs List 1 offshore pier 1a land side surface of offshore pier 2 pseudo rock wall 5 pseudo rock block S, E reference plane α inclination angle of side wall of quay rock β acute angle of reference surface of pseudo rock block (side inclination angle)

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Yoji Kasaba 1-2-4 Nakagawa, Tsuzuki-ku, Yokohama-shi, Kanagawa F-1403 F-term (reference) 2D018 EA01

Claims (5)

[Claims] 1. A pseudo-rock block for forming a pseudo-rock wall adjacent to a land side surface of a detached pier, the prism having a parallelogram cross section having an acute angle corresponding to an inclination angle of the land side surface of the detached pier. A pseudo-rock block characterized by having irregularities of natural rock formed on the basis of each surface. 2. The method of claim 1, wherein the parallelogram is a rhombus.
The pseudo rock block described in. 3. The pseudo rock block according to claim 1, wherein irregularities different from each other are formed on four side surfaces of the prism. 4. The pseudo rock block according to claim 3, wherein the two end faces of the prism have different irregularities. 5. A quasi-rock wall constructed by using the quasi-rock block according to any one of claims 1 to 5 and stacking the quasi-rock blocks in a state where the sides of the quasi-rock blocks are vertically overlapped.