KR20180120031A - Caisson with projecting part for wave pressure reduction - Google Patents

Abstract

The present invention provides a caisson with a projecting part for wave pressure reduction which is able to realize dispersion of wave energy introduced into a harbor at the inside and the outside of a wave chamber provided at the front wall side thereof. The caisson with a projecting part for wave pressure reduction according to a preferable embodiment of the present invention comprises: the wave chamber divided and arranged by horizontal and vertical division walls of the wave chamber perpendicular to each other toward the back of the front wall injected at the front surface of the bottom plate; and an external projecting portion formed with a plurality of slit type wave pressure inlet holes for introducing wave pressure of the wave energy generated at the outside of the harbor into the wave chamber at the front wall, and reducing the wave pressure introduced to the wave chamber around the slit type wave pressure inlet hole.

Description

{Caisson with projecting part for wave pressure reduction}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caisson used in a port structure, and more particularly, to a caisson having a wave pressure reducing protrusion that can dissipate wave energy introduced into a port in a water chamber.

The breakwater is a facility of the port, which is installed to maintain the constant temperature of the port and to facilitate the voyage of the ship, the security of the berth and the maintenance and unloading of the port facility. As a kind of breakwater, there is a caisson type upright. This is strong against the waves, the construction is sure, and the marine work can be reduced. The caisson applied to this method has a block shape made of reinforced concrete. The block type caisson is difficult to reduce the wave power only by the upright method.

As a background of the present invention, Korean Patent Laid-Open Publication No. 10-2016-0033380 discloses a caisson having a sofa pillar, a breakwater containing the same and a quay wall. Wherein the caisson is opened by a lower plate provided on the sea floor, a rear side wall provided on a rear upper surface of the lower plate, a left side wall provided on a left upper surface of the lower plate and a right side wall provided on a right upper surface of the lower plate, A hollow first sofa column is formed to deform the flow of the wave incident on the outer wall portion with the front face opened to dissipate the energy of the wave and to be in contact with the front inner wall of the left side wall, A hollow second sofa column is formed to be in contact with the front inner wall of the right wall, a plurality of hollow third sofa columns are spaced apart from each other in a space between the first sofa column and the second sofa column, A first sofa plate is protruded from the front side or rear side of the sofa column, a second sofa plate is formed on the front side or rear side of the second sofa column, The third sofa plate is protruded from both sides of the third sofa column, and the third sofa plate is spaced apart from the adjacent third sofa plate such that the front and the back are repeated, At least one large separating wall is formed by equally spaced at least one large partition wall so that at least four large separating spaces are formed, and the large separating space at the rear of the large separating space is used as a gravity chamber by filling a filling material having its own weight, And the large separation space at the front is used as a water retention chamber for the inflow of seawater.

In the background art, the effect of reducing the reflection wave can be ensured by increasing the sofa effect while simultaneously applying to the steel plate wave energy and the deep water depth. It is also possible to sufficiently secure the size of the oil seals and reduce the thickness of the wall, Securing the strength of the front surface on which the slit is formed, and securing sufficient resistance against the reflected rising wave.

However, the background art has a limitation in reducing the wave pressure by obtaining the sofa effect with only the slit.

Korean Patent Laid-Open Publication No. 10-2016-0033380

It is an object of the present invention to provide a caisson having a wave pressure reducing protrusion that can dissipate the wave energy introduced into a port in a water chamber provided in the front wall.

A caisson having a wave breaking reduction protrusion according to a preferred embodiment of the present invention is a caisson for reducing wave energy. The caisson for reducing wave energy includes a water retention chamber horizontal wall and a water retention chamber which are mutually orthogonal to the rear wall of the front wall, An oil chamber which is divided and arranged by the vertical partition wall is formed; A plurality of slit-shaped wave inflow holes are formed in the front wall for introducing the wave pressure of the wave energy generated by the wave outside the inflow chamber into a water chamber. A circumference of the slit-shaped wave inflow hole is formed with an outer side wall portion for reducing the wave pressure .

Further, the water retention chamber is further provided with an inner protrusion for reducing the pressure wave, which is arranged around the wall surface.

Further, the outer-side projection for reducing the wave pressure has a triangular cross-section or a trapezoidal cross-section.

In addition, the inner side projection for reducing the wave pressure has a triangular cross section or a trapezoidal cross section.

Further, the outer-side projection for reducing the wave pressure is characterized in that it is formed continuously or continuously in the longitudinal direction, and is discontinuously formed at a certain interval.

Further, the inner protrusion for reducing the wave pressure is characterized in that it is formed continuously or continuously in the longitudinal direction, and is discontinuously formed at a certain interval.

Further, the slit-shaped wave pressure inflow hole is characterized by being continuous in the longitudinal direction or segmented with a certain length.

Further, the slit-shaped wave pressure inflow hole is continuous in the lateral direction or is segmented with a certain length.

Further, the outer-side projection for reducing the wave pressure is characterized in that it is formed continuously or continuously in a transverse direction or separated by a constant interval.

Further, the bottom plate further includes an inner filling chamber which is divided into a plurality of rows in the rear of the water outlet chamber.

Further, the inner protrusion for reducing the wave pressure is characterized in that it is formed continuously or discontinuously in a transverse direction or separated at regular intervals.

According to the present invention, the wave pressure of the wave energy generated from the outer side of the casing is reduced by the horizontal partition wall of the water chamber and the vertical partition wall of the water chamber after flowing into the water chamber of the caisson, Since the reduction is also caused by the outer ridge portion and the inner ridge portion for reducing the wave pressure, the wave pressure dissipation effect of the wave energy can be increased, and the wave breaking of the breakwater can be reduced. It also reduces the stress of the caisson by the dissipation effect maximized by the wave energy and is advantageous for reducing the reaction force of the caisson. Further, the caisson can be reinforced by the inner and outer projections for reducing the wave pressure.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a caisson having a wave pressure reducing projection according to an embodiment of the present invention; Fig.
Figure 2 is a front view of Figure 1;
3 is a plan view of Fig.
4 is a sectional view taken along the line AA in Fig.
5A is an enlarged view of a portion 'K' in FIG. 3;
Fig. 5B is a partially enlarged view of a caisson having a wave pressure reducing projection according to another embodiment of the present invention; Fig.
6 is a view showing a construction state of a caisson having a wave pressure reducing projection according to an embodiment of the present invention.
7 is a perspective view and a partial enlarged view of a caisson having a wave pressure reducing projection according to another embodiment of the present invention.
8A and 8B are a perspective view and a partial enlarged view of a caisson having a wave pressure reducing projection according to another embodiment of the present invention.
Fig. 9 is a modification of the caisson having the wave pressure reducing projection shown in Fig. 8A. Fig.
Fig. 10 is a table showing the basic bearing capacity of a caisson having an existing caisson and the wave-breaking reduction protrusion of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

The caisson 10 according to the present invention is used as a harbor structure for reducing wave energy. As an example, the caisson 10 may be applied to a breakwater.

As shown in FIGS. 1 to 5, the caisson 10 is made of reinforced concrete. The caisson (10) has a plate-like bottom plate (12). The front wall 14 is formed at a predetermined height on the bottom plate 12. An oil chamber 20 is formed at the rear of the front wall 14 to receive the wave pressure of the wave energy generated by the waves. The water retention chamber 20 is formed by a water retention chamber horizontal partition wall 141 and a water retention chamber vertical partition wall 142 which are mutually orthogonal. The present water retention chamber 20 is arranged in a row in the longitudinal direction (longitudinal direction of the breakwaters), but it may be composed of two columns.

A plurality of slit-shaped wave pressure inflow holes 201 are formed in the front wall 14 to introduce wave pressure of wave energy generated outside the waveguide 20 into the water discharge chamber 20. The slit-shaped pressure wave inflow holes 201 are arranged at the same interval in one inflow chamber 20. In the present embodiment, the slit-shaped pressure wave inflow hole 201 is elongated in the longitudinal direction (height direction) and is separated into two rows in the vertical direction separated from the bottom plate 12 by a predetermined height. However, the present invention is not limited thereto, Or may be implemented in two or more rows by shortening the length. Accordingly, the wave pressure of the wave energy generated from the outer side is introduced into the water retention chamber 20 through the slit-shaped wave pressure inflow hole 201 as shown in FIG. 6, and then the water retention chamber horizontal partition wall 141 and the water retention chamber vertical partition wall 142 And is converted into reflected energy. At this time, a complicated turbulent flow of waves occurs in the slit type wave pressure inflow hole 201.

The front wall 14 is formed with an outside protruding portion 202 for reducing the wave pressure, which is located around the slit-shaped wave inflow hole 201 and reduces the wave pressure introduced into the water retention chamber 20. 5A, or may have a triangular cross-section as shown in FIG. 5B. The outer side of the outer shell 202 for wave pressure reduction is linear in the longitudinal direction (height direction) of the caisson 10.

In order to reduce the wave pressure introduced into the water retention chamber 20, the inside of the water retention chamber 20 is provided with the water retention chamber side partition wall 141 and the water repellency chamber internal partition wall 142, 203 may be further formed. In the case of the inner protrusion 203 for reducing the pressure wave, it may be formed into a trapezoidal section or a triangular section as shown in Figs. 5A and 5B. The wave breaking reduction inner projecting portion 202 is linear in the longitudinal direction of the caisson 10.

The outer ridge portion 202 for reducing the wave pressure and the inner ridge portion 203 for reducing the wave pressure can be continuously formed in a longitudinal direction without a segment or discontinuously formed by a constant gap G as shown in Fig.

Therefore, the wave pressure of the wave energy generated from the outer side is firstly reduced by the outer side wave protrusion 202 for reducing the wave pressure while being introduced into the water retention chamber 20 through the slit type wave pressure inflow hole 201, By the inner protrusion 203 for reducing the wave pressure.

The wave pressure of the wave energy generated from the outer side of the waveguide 10 is not reduced only by the water retention space partition wall 141 and the water retention chamber vertical partition wall 142 in the water retention chamber 20 of the caisson 10, 202 and the inner protrusion 203 for reducing the wave pressure. Therefore, the caisson 10 can increase the dissipation effect of the wave energy and can reduce the wave breaking of the breakwater. In addition, the stress of the caisson 10 is reduced by the dissipation effect maximized by the wave energy, and it is advantageous in reducing the ground reaction force of the caisson 10. It is possible to reduce the reinforcement cost of the foundation supporting the caisson 10 by reducing the ground reaction force of the caisson 10.

As shown in FIG. 10, the composite support force (A) shown in the existing caisson is compared with that of the existing caisson and the caisson 10 (referred to as a 'projection caisson') having the wave- (A)> B (B), and (B), respectively. In other words, it is confirmed that the composite bearing capacity (B) in the projection caisson is smaller than the synthetic bearing capacity (A) in the existing caisson.

The caisson 10 may further include a bottom filling chamber 21 which is divided into a plurality of rows at the rear of the bottom chamber 12 in order to increase its own weight at low cost. The filling chamber 21 is divided and arranged by an inner filling chamber horizontal partition 211 and an inner filling chamber vertical partition 212. The number and size of the filling chambers 21 are determined by the conditions of the site (wave, ground, etc.). The filling material 30 such as sandstone, sand, gravel, and concrete can be filled up to a certain height in the filling room 21. As shown in FIG. 6, the water filling chamber 20 can be filled with the filling material 30 at a predetermined height. '100' is a 'caisson cover' made of reinforced concrete.

8A and 8B, in the caisson 10 according to another embodiment of the present invention, the slit-shaped wave pressure inflow hole 201 may be constituted by being segmented with a certain length in the lateral direction (horizontal direction) have. At this time, the outside protruding portion 202 for reducing the wave pressure may be formed in the longitudinal direction (height direction) as shown in FIG. 1 and formed in the lateral direction (horizontal direction) as shown in FIG. 9, .

On the other hand, the inner protrusion 203 for reducing the pressure is exemplarily formed in the longitudinal direction in the present embodiment, but in the present invention, the inner protrusion 203 for reducing the pressure can be continuously formed in the transverse direction, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: Caisson
20: Reservoir
21: Inner filling room
201: Slit type wave pressure inflow hole
202: outer protrusion for wave pressure abatement
203: inner protrusion for wave pressure reduction

Claims (11)

In a caisson (10) for reducing blue energy,
A water chamber 20 divided and arranged by a water chamber horizontal partition wall 141 and a water chamber vertical partition wall 142 which are mutually orthogonal to the rear face of the front wall 14 installed on the front surface of the bottom plate 12 are formed Being;
The front wall 14 is formed with a plurality of slit-shaped wave inflow holes 201 for introducing wave pressure of wave energy generated outside the inflow chamber into the water discharge chamber 20, (202) for reducing the wave pressure to reduce the wave pressure introduced into the casing (20). The method according to claim 1,
The caisson (1) according to any one of claims 1 to 3, further comprising an inner protrusion (203) for reducing a wave pressure which is arranged around the wall surface in the water retention chamber (20). The method according to claim 1,
Wherein the outer side of the outer shell (202) has a triangular cross-section or a trapezoidal cross-section. 3. The method of claim 2,
The caisson (1) according to any one of claims 1 to 3, wherein the inner protrusion (203) for wave pressure reduction has a triangular cross section or a trapezoidal cross section. The method according to claim 1,
Characterized in that the wave-reducing abutment outer ridges (202) are continuously or continuously separated in a longitudinal direction and discontinuously formed. 3. The method of claim 2,
Characterized in that the inner side projection portion (203) for reducing the wave pressure is formed continuously or discontinuously in a longitudinal direction or at a constant interval. The method according to claim 1,
Characterized in that the slit-shaped wave inflow hole (201) is continuous in a longitudinal direction or segmented with a certain length. The method according to claim 1,
Characterized in that the slit-shaped wave pressure inflow hole (201) is continuous in a transverse direction or segmented with a certain length. The method according to claim 1,
Characterized in that the outer-side brackets (202) for reducing the wave pressure are formed continuously or discontinuously in a transverse direction or separated at regular intervals. The method according to claim 1,
Wherein the bottom plate (12) further comprises a filling chamber (21) divided in a plurality of rows at the rear of the water retention chamber (20). 3. The method of claim 2,
Characterized in that the inner side projection portion (203) for reducing the wave pressure is continuously formed in a transverse direction or separated by a constant interval and discontinuously formed.

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