JPH1037162A - Joint structure in underwater structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide joint structure which applies to an underwater structure in which a plurality of heavy structural units are installed adjoiningly and can follow up well a change in the relative displacement in the positional relationship between the heavy structural units. SOLUTION: A joint structure according to the invention applies to a joint 20 between two adjoining structural units 1 and 2 located underwater such as in the sea or a river, wherein a notch 2a in the joint stretching direction is provided in one of the structural units 1 and 2, and one 5 of two frames 4 and 5 fitted to one another and sliding is fitted in the notch 2a, while the other frame 4 is contacted slidably with the structural unit 1 which is not equipped with notch 5. A sack 3 of resilient material filled with a fluid is installed between the two frames 4 and 5, and a specified pressure is applied to the fluid so that the sack 3 is put in tight attachment to the structural units 1 and 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between structures standing adjacent to each other in water.

[0002]

2. Description of the Related Art In order to construct an underwater structure, for example, a breakwater or the like, in two or more caissons erected in the sea so as to be adjacent to each other, the joint structure between the caissons is as follows. Some exist as prior art. 1. A joint structure in which a bag made of canvas cloth is filled with concrete, mortar, or the like, and the bag is arranged at a joint. This joint structure is a so-called concrete joint. 2. A joint structure in which a rubber bag is filled with sand and also filled with a so-called water-swellable rubber which absorbs water and expands, and the bag is arranged at a joint. In this joint structure, the effect of pressing the bag against the joint by the internal pressure acting on the bag can be expected. 3. An joint structure in which an L-shaped rubber plate is fixed to one caisson to oppose wave pressure from one direction.

[0003]

In the conventional caisson breakwater, since it is assumed that the seawall will sink due to its weight, the construction is carried out for a long time. In other words, the caisson-type breakwater consists of a step of constructing a foundation mound mound on the bottom of the water, a step of placing a plurality of caissons on this mound, a step of providing a superstructure or parapet on the caisson, After the settlement of the caisson has settled down to a certain extent, the process of closing the joints between the multiple caisson is performed, but these processes take a considerable amount of time, for example, they are performed every different year. Hanging and constructing.

However, if an underwater structure consisting of a heavy structure such as a caisson breakwater must be completed at an early stage, a downtime cannot be taken between each process until the settlement is completed. It is necessary to absorb the effect of the joint at the joint.

[0005] In response to such a demand, the above-mentioned conventional joint structure has a problem that it cannot sufficiently follow the displacement due to settlement. That is, 1. No elastic deformation can be expected at the “concrete joint” of 2. In the “Rubber bag joint containing water-swellable rubber” described above, the internal pressure is limited to the structure, and the amount of deformation cannot follow the settlement. In the “L-shaped rubber plate joint”, the original purpose is to prevent the suction of the landfill sediment on the back of the breakwater, and it is impossible to elastically deform so as to follow the settlement.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an underwater structure having a plurality of heavy structures adjacent to each other, in which a relative displacement occurs in the positional relationship between the respective heavy structures. It is an object of the present invention to provide a joint structure capable of following the relative displacement even when the joint is moved.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and its gist is a joint structure between adjacent standing structures in water such as the sea or a river. In addition, a bag filled with a fluid is disposed at the joint, and the fluid is used to apply an internal pressure to the bag with the fluid in order to closely adhere the bag following the movement of each of the structures. The joint structure of an underwater structure is provided with an internal pressure imparting fluid amount adjusting means for adjusting a fluid amount in the bag body.

[0008] In the joint structure of the underwater structure according to the present invention, at least one of the structures has a cutout extending in the joint extending direction, and one of the two frame members slidingly fitted and engaged with each other. The two frame bodies fitted with each other are arranged so as to fit into the notches of one of the structures, and the other frame body is slidably contacted with the other structure. Between,
The bag may be arranged.

In the joint structure according to the present invention, the bag has a horizontal cross-sectional area (maximum volume) of a size sufficient to allow the bag to adhere to the joint between the structures in accordance with the expansion of the joint. Then, any material may be used. Therefore, all parts of the bag body may be formed of an elastic material such as fiber reinforced rubber or steel wire reinforced rubber, or partially formed of an elastic material, and this elastic material portion is connected with a reinforced canvas. It may be formed as described above, and furthermore, all parts may be formed with a reinforced canvas.

In the joint structure of the present invention, the fluid may be such that the bag can be expanded by filling the bag with the fluid, or the bag can be contracted by removing the bag from the bag. For example, it may be a liquid such as water or oil, or a gas such as air.

Here, in the joint structure of the present invention, when the fluid is a liquid, the internal pressure imparting fluid amount adjusting means may be, for example, a liquid storage tank filled with liquid (a vertically long tank having a cylindrical shape. May be formed higher than the bag, and the storage tank and the bag are connected by a conduit. In such an internal pressure imparting fluid amount adjusting means, a pressure acts on the liquid due to the potential energy of the liquid to apply an internal pressure to the bag, and the bag comes into close contact with each structure. Also, when the displacement of the positional relationship such that the interval between the structures is reduced, the bag is pressed and contracted by each structure, and the liquid inside the bag returns to the liquid storage tank via the conduit, Thereby, the liquid amount of the bag is adjusted. Conversely, when a displacement in a positional relationship such that the interval between the structures increases, the liquid under pressure due to the potential energy flows into the bag by an amount corresponding to the displacement of each structure, and The body expands while being in intimate contact with each structure, thereby adjusting the amount of liquid in the bag.

When the fluid is a gas, for example,
The compressor and the bag communicate with each other via a conduit, and the bag is provided with a sensor for measuring the internal pressure and an on-off valve, and a signal from this sensor opens and closes the on-off valve, stops the compressor, and furthermore, If a control device capable of pumping a gas is provided, the internal pressure imparting fluid amount adjusting means can be formed. In such an internal pressure imparting fluid amount adjusting means, if the gas is pressure-fed by a compressor, the internal pressure can be applied to the bag body to bring the bag body into close contact with each structure. further,
When a displacement in a positional relationship occurs such that the distance between the structures is reduced, the internal pressure of the bag body is increased by being pressed by each structure, and the increase in the internal pressure is sensed by a sensor, and a signal is sent to the control device. If the control device stops the compressor and opens the opening / closing valve of the bag, and appropriately controls the internal pressure of the bag, the bag can be contracted while the amount of gas inside is adjusted so that it is in close contact with each structure. it can. Conversely, if the displacement of the positional relationship such that the distance between the structures increases, the internal pressure of the bag is appropriately controlled by the reverse operation to expand the bag while keeping the bag in close contact with each structure. .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a perspective view showing a joint structure of the present invention, FIG. 2 is a partially enlarged plan view of FIG. 1, FIG. 3 is a front view showing a head column used for the joint structure of the present invention, FIG. 4 is a partially enlarged plan view showing a joint structure different from FIGS. 1 and 2.

1 and 2, the joint structure of the present invention is applied to a joint 20 between caisons of a caisson-type breakwater. However, the joint structure of the present invention is applied to a joint of an underwater structure other than the caisson-type breakwater. It is also possible to apply. In FIG. 1 and FIG. 1, in a joint structure 30 between the caissons 1 and 2 placed on a foundation stone mound (not shown) constructed on the seabed, one caisson 2 has a substantially vertical notch (recess). 2) is extended, and the second frame 5 is fitted into the notch 2a. As shown in FIG. 2, the second frame 5 has a substantially “U” -shaped cross section. The web 5 a is arranged in contact with the notch surface, and the second frame 5 is connected to the flanges 5 b, 5 b. The space filling material 6 is filled between the notched surfaces. Here, a water-swelling rubber can be used as the filling material 6. The water swelling rubber is made of flanges 5b, 5b.
After being placed in the gap between the notch and the notch, it absorbs water and expands, so it is easy to push it into the gap,
The gap can be sealed by being pressed against the flange 5b and the notched surface, and the fine movement of the second frame 5 can be absorbed.

The first frame 4 is arranged so as to fit in the second frame 5 thus arranged. The first frame 4 includes side plates 4 b, 4 b separated from each other by a distance that can be fitted between the flanges 5 b, 5 b of the second frame 5, and the side plates 4 b, 4 b.
b, connecting plates 4a and 4c for connecting
The b and 4b and the connecting plates 4a and 4c are formed so as to have a substantially rectangular cross section, and the connecting plate 4a is arranged so as to be in contact with the caisson 1 by the internal pressure of the bag body 3 described later. In other words, the first frame 4 is not fixed to the caisson 1 but is arranged so as to simply contact the caisson 1 and slide.

The bag 3 is disposed between the fitted first frame 4 and second frame 5. The bag body 3 may be entirely formed of an elastic material such as fiber reinforced rubber or steel wire reinforced rubber, or may be partially formed of an elastic material and connected to the elastic material portion with a reinforced canvas. In other words, it may be formed of a shape or a material that can expand and contract. The top end of the bag 3 is sealed with a plate (not shown) or the like, and a pipe or the like is attached to the plate to form a water supply port (not shown). Is attached to the water column 7 and water is supplied from the water column 7 to the bag 3. A pipe other than the water supply port is attached to the top plate of the bag body 3 to form a drain port, and a valve is attached to the drain port.

The water head column 7 is capable of storing water therein, and communicates with a water supply pipe 7b and an overflow pipe 7c at the upper end of a hollow water storage section 7a extending upward, thereby forming a water storage section 7a. A water outlet 7e for connecting the conduit 8 is provided near the lower end, and a water level check window 7d is provided near the upper end of the water storage portion 7a. Such a water column 7 has, for example, an inner diameter of the reservoir 7a of about 250 mm and a height of 5 m.
When the water is filled in the water storage portion 7a, the bag 3 can be subjected to an internal pressure of approximately 0.5 kg / cm ² or more. In addition, if the height of the water storage part 7a is previously formed more than required and the internal water level is changed suitably, an internal pressure can also be changed as needed. In addition, the water column 7 is provided with a lower limit mark 7d 'in the water level check window 7d, and when the water level falls below the lower limit mark 7d', the worker opens the water supply and injects water. Water may be injected by the method described in the above. For example, a water level sensor (not shown) is installed at the position of the lower limit mark 7d ', and a control device (not shown) for opening or closing the water supply in response to a signal from this sensor is provided. Water injection may be performed by a sensor and a control device.

In the head column 7, a conduit (not shown) communicating with a water supply or the like is connected to a water supply port 7 b ′, from which water is taken into a water storage section 7 a, and this water is directly supplied to the water outlet 7.
e into the bag 3 via the conduit 8. At this time,
The valve at the drain port of the bag 3 is kept open, and water is injected into the bag 3 until the bag 3 overflows. If water overflows from the drain, close the valve. After the valve is closed, the water level of the head column 7 rises. When water overflows from the overflow pipe 7c of the water column 7, the supply of water from the water supply is stopped.

Next, in the joint structure 30 having the above structure,
The operation when the caisson 1 or 2 sinks and the relative position is displaced will be described.

In the joint structure 30 shown in FIGS. 1 and 2, an internal pressure is constantly applied to the bag body 3 by the water pressure from the head column 7, and the bag body 3 is formed by the internal pressure. The first frame 5 is pressed so that the connecting plate 4a of FIG. Such joint structure 3
0, the caisson 1, 2 in the arrow X direction or the arrow Z direction.
When the relative displacement occurs, the connecting plate 4 of the first frame 5
In the state where a is pressed against the ground surface of the caisson 1, it slides here to follow the displacement.

When the caissons 1 and 2 are displaced relative to each other in the direction of arrow Y in FIG. 1, the first frame 4 and the second frame 5 are connected to the side plate 4b and the flange 5b, respectively. While sliding, the first frame 4 moves so as to reduce or expand the mutual clearance, and the first frame 4 is in contact with the caisson 1 under the pressure from the bag 3. That is, when the caissons 1 and 2 move in the direction in which the clearance decreases, the connecting plate 4c of the first frame 4 and the web 5a of the second frame 5 press the bag 3 therebetween, and the bag 3 While returning the water inside from the water outlet 7e to the head column 7 via the conduit 8,
When the water level of the head column 7 is raised and the shrinkage of the bag body 3 is large, the water in the head column 7 flows out of the overflow pipe 7c. In this way, the bag 3
The amount of water stored inside the bag 3 is adjusted so that the bag 3 can be deformed without being damaged even when it receives a large external force. Further, even when the bag body 3 is contracted and deformed, the first frame 4
Is pressed against the ground surface of the caisson 1. Conversely, when the caisson 1 and 2 move in the direction in which the clearance increases, the water in the head column 7 flows into the bag 3 and
The bag body 3 expands while being pressed against the connecting plate 4c and the web 5a. The first frame 4 is pressed by the internal pressure of the bag 3 at the time of inflation, and is brought into contact with the ground surface of the caisson 1.

As described above, the internal pressure is always applied to the bag body 3 and the first frame 4 is constantly pressed so as to contact the ground surface of the caisson 1. Even if the water sinks and a relative displacement occurs in the positional relationship, the joint structure 30 can be prevented from being opened, and the intrusion of waves from the open sea can be prevented.

FIG. 4 illustrates a joint structure in which notches are not formed in the joints of the caissons 1 and 2. In FIG. 4, the second frame 15 has fixed ends 15c, 15c and a flat plate portion 15a formed flush with each other.
And the flange 1 so as to be orthogonal to the fixed ends 15c, 15c.
5b and 15b are provided integrally, and thus the flat plate portion 15
a and the flanges 15b, 15b have a substantially U-shaped cross section. Such a second frame 15 is a fixed end 1
The anchor bolts 15d, 15d are passed through 5c, 15c and fixed to the caisson 2.

In the second frame 15 arranged as described above,
The first frame 14 is arranged to fit. In the first frame 14, the side plates 14b, 14b are spaced apart from each other so as to be fittable between the flanges 15b, 15b of the second frame 15, and other structures such as connecting plates 14a, 14c are provided. Is
It is formed in the same arrangement as the second frame 5 shown in FIG. The bag 3 is disposed between the connecting plate 14c and the flat plate portion 15a, and the internal pressure of the bag 3 causes the connecting plate 14a to abut on the surface of the caisson 1.

The joint structure of FIG. 4 operates in the same manner as the joint structure of FIG. 2, and prevents the joints from being opened even when the caisson 1 or 2 sinks and a relative displacement occurs in the positional relationship. Can be.

[0026]

According to the joint structure of the underwater structure of the present invention, the bag disposed at the joint is filled with a fluid, the internal pressure is applied to the bag, and the internal pressure applied fluid amount for adjusting the fluid amount in the bag is adjusted. Since the adjusting means is provided, even when the joints expand and contract due to the movement of each structure due to sinking or the like, the amount of water in the bag is appropriately adjusted so as to follow the movement of the joints, and the bag expands and contracts. Can be kept closed.

In the joint structure for an underwater structure according to the present invention, one of the two frames slidingly fitted and fixed to each other is fitted and fixed to the notch of one of the structures. And the other frame is slidably abutted against the other structure and arranged.
Since the above-mentioned bag is arranged between the two frames, the other frame slides on the surface of the other structure while being constantly pressed against the other structure by the internal pressure of the bag, whereby The closed state can be maintained by following the movement of the joint.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a joint structure of the present invention.

FIG. 2 is a partially enlarged plan view of FIG.

FIG. 3 is a front view showing a head column used in the joint structure of the present invention.

FIG. 4 is a partially enlarged plan view showing a joint structure different from FIGS. 1 and 2;

[Description of Signs] 1 caisson (structure) 2 caisson (structure) 2a notch 3 bag 4 first frame (frame) 5 second frame (frame) 14 first frame ( Frame) 15 Second frame (Frame) 20 Joint 30 Joint structure

Continuation of front page (71) Applicant 591027237 Cosmo Engineering Co., Ltd. 1-20-19 Shimanouchi, Chuo-ku, Osaka-shi, Osaka (72) Inventor Takahashi ▲ Sakae ▼ 2 2-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Shirashima (72) Inventor Yoshihide Miyamoto 2-5-8 Kitaaoyama, Minato-ku, Tokyo In-house Co., Ltd. (72) Inventor Takashi Taniguchi 2 Tobancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Ryu Fukuhara 2-6-4 Kita-Ueno, Taito-ku, Tokyo Echo Co., Ltd. (72) Inventor Shigeharu Kobe 2-5-8, Higashishinagawa, Shinagawa-ku, Tokyo Co., Ltd.

Claims (2)

[Claims] 1. A joint structure between adjacent structures standing in water such as the sea or a river, wherein a bag filled with a fluid is arranged at the joint, and An internal pressure applying fluid amount adjusting means for applying an internal pressure to the bag body with the fluid in order to closely adhere to the movement of each of the structures and adjusting a fluid amount in the bag body is provided. Joint structure in underwater structures. 2. A notch in a joint extending direction is formed in at least one of the structures, and one of the two frames that fit and slide with each other is connected to one of the structures. It is arranged by fitting into the notch, the other frame is slidably in contact with the other structure, and the bag is arranged between the two frames fitted to each other. 2. The method according to claim 1, wherein
Joint structure in the described underwater structure.