JPH1037153A - Emergency correspondence type wave-forcebreaking method at harbor entrance part and its breakwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency correspondence type waveforebraking method which dies not impair a view, provides simple operation principle, and facilitates the maintenance and control by raising a steel pipe pile toward a water surface due to compressed air from the inside of a steel pipe sheet pile embedded in the ground bed on a sea bottom in such a manner that it blocks a harder entrance part. SOLUTION: Many steel pipe sheet piles 2 are embedded in such a manner that they block the ground bed G on a sea bottom of a harbor entrance part continuously. Next, each steel pipe pile 4 of which upper end is blocked by an intermediate lid member 10 is inserted and stored in the inside of each steel pipe sheet pile 2 in such a manner that each steel pipe pile 4 can move vertically, respectively. Furthermore, a compressed air in and out port is provided in a heat part of each steel pipe pile 4. Moreover, concrete for fixing pile 7 is placed below the inside of each steel pipe sheet pile 2, respectively. Then, when abnormal waves occur, compressed air is poured into the inside of the steel pipe pike 4 through the compressed air in and out port in the head part of the steel pipe pile 4, buoyancy is generated in the steel pipe pile 4, and it is lifted toward a water surface S so that each steel pipe pile 4 which floats continuously becomes breakwater. Consequently, it is possible to prevent the worsening of stillness in a port and facilitate the maintenance and control without necessitating large remodeling of the existing harbor entrance part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a port entrance provided with a breakwater comprising a number of steel pipe piles so as to cover the port entrance in order to prevent the calmness in the port entrance from being deteriorated when an abnormal wave is generated due to a typhoon or the like. Emergency response type breakwater method and its breakwater.

[0002]

2. Description of the Related Art In order to keep the calmness of a port moored with a ship at all times and to prevent the waves of the open sea from entering the port as much as possible, a breakwater or the like at the port entrance which can respond urgently when an abnormal wave due to a typhoon or the like occurs. It is necessary to provide such a structure, but providing such a structure narrows the width of the port, which hinders the passage of the ship at the port at normal times, and the construction cost of the structure At the same time, the operation of the structure becomes extensive, and the installation of such a structure at the existing port entrance requires a major renovation of the port entrance, and furthermore, the landscape is damaged, and its maintenance and management There was a problem that it was serious.

[0003]

SUMMARY OF THE INVENTION The present invention does not require major remodeling of existing port entrance facilities, does not impair the scenery, has a simple operation principle, and is easy to maintain and manage. It is an object of the present invention to provide a compliant breakwater method and a breakwater.

[0004]

According to the present invention, there is provided an emergency response type wavebreak method at a port entrance, in which a large number of steel pipe sheet piles continuously buried in a submarine ground so as to cover the port entrance when an abnormal wave occurs. It consists of a breakwater method that raises a large number of steel pipe piles toward the water surface by compressed air, and the breakwater applied to the breakwater method is a large number of steel pipe sheet piles buried continuously so as to cover the underwater ground at the port entrance. Inside, each steel pipe pile whose outer diameter is slightly smaller than the inner diameter of each steel pipe sheet pile and whose upper end is closed is inserted so as to be vertically movable, and the injection and discharge of compressed air into and from the head of the steel pipe pile is performed. It consists in providing each possible compressed air inlet / outlet.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an emergency response type breakwater at a port entrance according to the present invention and a breakwater applied to the method will be described below with reference to the drawings. As shown in the side sectional view and the plan view of FIG. 2, abnormal waves from the open sea and the like are prevented from flowing from the direction of arrow W through the port 1 of FIG. A large number of steel sheet piles 2 are buried as shown in FIG. 2 so as to continuously cover the underwater ground G of the part 1, and the respective steel pipe sheet piles 2 are continuously connected by joints 3. In this state, the ship can pass freely.

Next, as shown in FIG. 3 which is an enlarged front view of FIG. 2 and FIG. 4 which is a plan view of FIG. 3, the inside of each steel pipe sheet pile 2 has an inner diameter D of each steel pipe sheet pile 2. Each steel pipe pile 4 whose outer diameter E is slightly small and whose upper end is closed by the inner lid member 10 is inserted into the steel pipe sheet pile 2 so as to be vertically movable and can be stored. The heads of the steel pipe piles 4 are connected laterally by H-shaped steel 5 as shown in FIG.

Further, a compressed air inlet / outlet 6 is provided at the head of each steel pipe pile 4, and compressed air A is externally injected into each steel pipe pile 4 via a pipe (not shown), or the compressed air A is supplied to the inside. Can be led out to the outside. Further, as shown in FIG. 6 which is an enlarged side sectional view of a main part of the steel pipe sheet pile 2, concrete 7 for fixing piles is provided inside each steel pipe sheet pile 2 below.

Therefore, the inside of a large number of steel pipe sheet piles 2 continuously buried in the underwater ground G so as to cover the port entrance 1 having the above-described structure is set up in a normal state where no abnormal waves are generated. The steel pipe pile 4 is stored in the state shown by the two-dot chain line L in FIG.
Next, when an abnormal wave occurs due to a typhoon or the like, the compressed air is injected into the steel pipe pile 4 from the compressed air inlet / outlet 6 at the head of the steel pipe pile 4, so that the water in the steel pipe pile 4 is discharged from the lower end of the steel pipe pile 4. , Buoyancy is generated in the steel pipe pile 4 and the steel pipe pile 4 rises toward the water surface S, so that each continuously rising steel pipe pile 4 becomes a breakwater and has a function of stopping abnormal waves from the direction of the arrow W. I do.

Conversely, when there is no abnormal wave, the compressed air A is led out from the compressed air inlet / outlet 6 so that the inside diameter of the steel pipe pile 2 shown in FIG.
Water is filled into the steel pipe pile 4 from a gap K formed by a difference between the steel pipe pile 4 and the outer diameter E of the steel pipe pile 4, and each steel pipe pile 4 is settled and stored in each steel pipe sheet pile 2 by its own weight. The gap K between the steel pipe sheet piles 2 and the steel pipe piles 4 may be impeded by gravel or the like and hinder the ascent work. Therefore, when such a hindrance occurs, a sensor for notifying the abnormality is provided. For example, the gap K may be cleaned by providing a space, or water may be circulated through the gap K for cleaning.

[0010]

According to the above-described breakwater method and breakwater of the present invention, when an abnormal wave occurs, a large number of steel pipe piles are continuously raised to break the wave as a breakwater, thereby deteriorating the calmness in the harbor. The breakwater is normally housed in a steel pipe sheet pile buried in the bottom of the water, so that there is no hindrance to the passage of the navigation section of the ship.

In addition, the breakwater of the present invention has a relatively simple structure, and can be applied particularly to existing ports without requiring major modifications, and does not impair the scenery. Easy.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a breakwater according to an embodiment of the present invention.

FIG. 2 is a plan view of the breakwater of FIG. 1;

FIG. 3 is an enlarged front view of a main portion of the breakwater of FIG. 2;

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is an enlarged side sectional view of a main part of the steel pipe pile head of FIG. 3;

FIG. 6 is an enlarged side sectional view of a main part of a lower part of the steel pipe sheet pile of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Port mouth part 2 Steel pipe sheet pile 4 Steel pipe pile 6 Compressed air inlet / outlet A Compressed air D Inside diameter E Outside diameter G Underground S Water surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiaki Hayasaka 18 Nippon Odori, Naka-ku, Yokohama-shi, Kanagawa Prefecture Inside Toa Construction Industry Co., Ltd. (72) Inventor Ryoichi Tanaka 18 Nippon Odori, Naka-ku, Yokohama-shi, Kanagawa Prefecture Toa Construction Industry Co., Ltd. (72) Inventor Yoshiaki Niikura 18 Nippon Odori, Naka-ku, Yokohama City, Kanagawa Prefecture Toa Construction Industry Co., Ltd. (72) Inventor Toshio Mizuno 18 Nippon Odori, Naka-ku, Yokohama City, Kanagawa Prefecture 18 Toa Construction Industry Co., Ltd. (72) Inventor Shinya Shiromura 18 Nippon Odori, Naka-ku, Yokohama, Kanagawa Prefecture Toa Construction Industry Co., Ltd.

Claims (2)

[Claims] 1. An emergency response at a port entrance in which, when an abnormal wave occurs, a large number of steel pipe piles are raised at once from the inside of a large number of steel pipe sheet piles buried continuously in a water bottom ground so as to cover the port entrance. Formula breakwater method. 2. Inside each of a number of steel pipe sheet piles continuously buried so as to cover the water bottom ground at the port entrance, each steel pipe pile whose outer diameter is slightly smaller than the inner diameter of each steel pipe sheet pile and whose upper end is closed. Emergency-response breakwater at the port entrance, which is inserted vertically movably and has a compressed air inlet / outlet at the head of each of the steel pipe piles, which can inject and discharge compressed air.