JPH07119451B2 - Apparatus and method for prevention of water bottom sediment scour pollution in deadline construction - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to scouring of deposits such as sludge on the bottom of a water for speeding up a river flow or tidal current in a water area between the ends of both deadlines when a deadline construction is carried out in a river mouth or a bay. The present invention relates to a device and a method for preventing the neighboring water area from being polluted by the above and / or preventing the performance of the cut-off dam from being deteriorated due to scouring.

[0002]

2. Description of the Related Art When a deadline is constructed at both sides of a river mouth, bay, etc., if the deadlines are constructed from both sides, the intervals between the ends of the deadlines will gradually narrow, and the river in the water area between the ends of the deadlines will be reduced. Current and tidal current changes and speeding up occur, and as a result, sediments such as sludge and sludge accumulated on the bottom of the water are scoured and rolled up, polluting nearby water areas and causing great damage to laver culture, livelihoods, etc. May be given.

[0003] In order to prevent pollution due to sludge scouring at the time of such a deadline construction, a method has conventionally been used to prevent the diffusion of sludge by installing a pollution prevention film or the like on the water surface.

[0004]

However, when the distance between the tips of the two levee dikes is reduced to, for example, 600 m or less in the closing work, the flow velocity of the tidal current flowing in the water area between the two tips reaches 6 m / sec. In such a high-velocity river or water area where a tidal current flows, the conventional pollution control film is washed away and is useless.

Therefore, the present invention can effectively prevent the pollution due to scouring of sediment such as sludge and sludge at the bottom of the water even in such a fast-flowing water area. It is an object to provide an apparatus and method.

[0006]

Means for Solving the Problems A deposit scouring / pollution prevention device of the present invention that achieves the above-mentioned object is a sheet in which a suspending member insertion hole is formed at an appropriate position, and the suspending member insertion hole is inserted into the sheet. Sinker suspension hanging member and a sheet pressing member composed of the sinker coupled to the sinker suspension hanging member, and an arbitrary position of the sinker hanging suspension member at an arbitrary position above the seat And a stopper member capable of adjusting the position on the hanging member attached to the.

In one aspect of the present invention, in addition to the above features, an elastic seal having a hole having a diameter smaller than that of the hanging member for hanging the sinker is arranged adjacent to the hanging member insertion hole. An apparatus is provided which is characterized in that the hanging member is inserted into the hole.

Further, in another aspect of the present invention, in addition to the above-mentioned features, one of the parts of the suspension members for suspending each sinker, which is exposed on the sheet after adjusting the tension of the suspension member, is adjacent. It is characterized in that it is connected to a portion of the sheet restraining member of the hanging member which is exposed on the sheet.

In another aspect of the present invention, in addition to the above features, the sheet includes a sheet body and a connection sheet for connecting adjacent sheet bodies, and a sheet is provided at an edge portion of the sheet body and the connection sheet. A connecting means for connecting the main body and the connection sheet is provided, and the hanging member insertion hole is formed in the connection sheet.

Further, in another aspect of the present invention, in addition to the above characteristics, the suspender for suspending the sinker is inserted through the suspending member insertion hole of the connection sheet, and the stopper member is used for suspending the sinker. The hanging member is attached to an arbitrary position, the sheet restraining member is sunk to the bottom of the water together with the connecting sheet, and then the joining sheet and the adjacent sheet body are joined by the joining means.

The method of preventing scour pollution of water bottom sediment according to the present invention, which achieves the above-mentioned object, comprises a seat having a suspending member insertion hole at an appropriate position, a sinker and a suspender for suspending a sinker attached to the sinker. A sheet restraining member made of a lower material is prepared, and a stopper member capable of adjusting the position on the suspending member is inserted into the suspending member insertion hole of the sheet to insert the suspender for suspending the sinker of the sheet restraining member. The sinker suspension hanging member is optionally attached, the seat and the sheet restraining member are submerged in the water bottom of the required area, and then the position of the stopper member on each sinker hanging suspension member is adjusted to suspend the sinker. It is characterized in that the tension of the hanging material for hanging is adjusted to a predetermined value.

[0012]

[Function] When the suspender for suspending the sinker is inserted into the suspending member insertion hole of the seat, the stopper member is attached to the suspending member, and the seat is submerged together with the seat restraining member in the water bottom of the required area, each of the seat restraining members The sinker sinks in the sediment layer such as sludge on the bottom of the water until the stopper member comes into contact with the sheet and the descent of the suspending material stops, whereby the sheet is pressed against the surface of the sediment layer.

Even if the sinker reaches the surface of the sand layer below the sediment layer, if the hanging member sags and the tension applied to the hanging member becomes smaller than a predetermined value, the hanging member is pulled up until there is no slack, and the stopper member is pulled up. Is lowered and brought into contact with the reinforcing belt to adjust the tension of the suspension member to a predetermined value. If the hanging material is too tight, reverse the procedure. In this way, the sheet is pressed to the surface of the deposit layer by each sheet restraining member,
Winding up of sludge and sludge due to tidal current is prevented.

An elastic seal having a hole having a diameter smaller than the diameter of the hanging member for hanging the sinker is arranged adjacent to the hanging member insertion hole, and when the hanging member is inserted into this hole, the hanging Sludge and sludge are prevented from flowing out above the sheet through the gap between the material insertion hole and the hanging material.

Further, after adjusting the tension of each suspender for suspending sinkers, the portion of each suspending member protruding on the sheet is projected on the sheet of the suspending member of any one of the adjacent sheet restraining members. When the sheet is joined to the portion, the sheet is held by the joined hanging member, and the seat is prevented from rising in the portion other than the portion held by the sheet restraining member.

Further, when the sheet is constituted by a connecting sheet for connecting adjacent sheets to the main body and a hanging member through hole is formed in the connecting sheet, the sheet restraining member is previously sunk together with the connecting sheet, By connecting the main body to the connection sheet later, connection work of the sheets becomes easy. It should be noted that ropes, chains, iron bars, and the like can be used as the hanging materials.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In this embodiment, a rope is used as a hanging material.

FIG. 1 is a perspective view showing an example of a sheet restraining member used in the present invention, FIG. 2 is a plan view showing a state in which the sheet is laid, FIG. 3 is a plan view showing an example of the sheet, and FIG.
Is a side sectional view showing a state in which the seat is laid on the water bottom, FIG. 5 is a view taken along the line AA of FIG. 1, FIG. 6 is a view showing a method of adjusting the tension of the rope for suspending the sinker, and FIG. It is a perspective view which shows the example which couple | bonded the ropes for lowering.

To carry out the present invention, the sheet 1 shown in FIG. 3 and the sheet restraining member 2 shown in FIG. 1 are prepared. The seat 1 includes a sheet material 3 and a reinforcing belt 4 attached thereto. For the sheet material 3, when the deposit particles are 0.2 to 0.074 mm, a material having water permeability and impermeable to sludge, clay, etc., for example, synthetic fiber such as geotextile is preferably used. Further, when the deposit particles have a particle size smaller than this, it is preferable to use a water-impermeable sheet material.
A reinforcing belt 4 made of a plastic sheet or the like is fixed to the peripheral portion of one side or both sides of the sheet material 3 and an appropriate place by means such as stitching and bonding. This sheet 1
Rope insertion holes 5 are formed at appropriate positions such as the corners of the reinforcing belt 4 and at positions corresponding to the sheet material 3. Further, an elastic seal 10 (FIG. 1) made of rubber, synthetic resin or the like having a hole 10a which is slightly smaller than the diameter of a rope for hanging a sinker described later so as to be concentric with the rope insertion hole 5 is reinforced with an adhesive. It is glued to 4. The sheet 1 has a long width of about 5 to 10 m and is wound around a roll on a laying ship. At the time of construction, the sheet 1 having a required length is unwound, cut, and laid on the water bottom.

The rope restraining member 2 comprises a sinker 6 formed of a concrete block or the like and a sinker hanging rope 9 attached to an anchor hook 7 embedded in this sinker by a wire clip 8.

To lay the sheet 1 on the water bottom, first, the sheet 1 is unwound from a sheet roll (not shown) on the laying ship, and each rope insertion hole 5 and the hole 10a of the elastic seal 10 are provided.
The rope 9 for suspending the sinker of the seat restraining member 2 is inserted through. Next, after the washer 11 is fitted into the rope 9, a stopper member 12 whose position on the rope can be adjusted is attached to an arbitrary position on the rope 9. In this embodiment, a wire clip is used as the stopper member 12. This wire clip has an arc-shaped rope engaging portion 12a.
The operating portion 12b is provided, and the inner diameter of the wire clip can be changed by rotating the nut 12c of the operating portion. That is, when fixing the wire clip to the rope, operate the nut to reduce the inner diameter of the wire clip to make it difficult to insert the rope, and to release the wire clip and move it on the rope, operate the nut to operate the inner diameter of the wire clip. To expand. The structure of this wire clip is known.

As shown in FIG. 2, the seat 1 to which the seat restraining member 2 is attached in this manner is sequentially laid on the bottom of the fast-moving water area near the tips of the deadlines 13 and 14. In this case, by laying the sheet 1 so that the longitudinal direction of the sheet 1 coincides with the direction of the water flow, it is possible to prevent the sheet 1 from being turned over by the water flow.

In FIG. 2, the leftmost sheet 1-1 is first laid. The sheet 1-1 has sheet restraining members 2 attached to the rope insertion holes 5 on both sides. When the sheet 1-1 has been laid, the sheet 1-2 is laid parallel to the sheet 1-1. The seat 1-2 has a rope through hole 5 on the right side in FIG.
Attach the seat restraint member 2 only to the seat 1-2 in FIG.
The sheet 1-2 is laid so that the left side edge thereof overlaps the right side edge of the sheet 1-1 which has already been laid. At the overlapping portion of the seat 1-1 and the seat 1-2, the stopper member 12 of the seat restraining member 2 of the seat 1-1 is once removed, and the seat 1-1 of the sinker hanging rope 9 is removed.
After the portion that is exposed outside is inserted into the rope insertion hole 5 corresponding to the rope of the sheet 1-2, the washer 11 and the stopper member 12 are attached and fixed to the rope 9. Similarly, the sheets 1-3, 1-4, ... Are laid.

As shown in FIG. 4, the sinker 6 of each seat restraint member 2 lowered to the bottom of the water sinks into the sludge layer 15 and sits on a support layer 16 such as a sand layer below the sludge layer 15. In this case, if the rope length of the sinker hanging rope 9 from the sinker 6 to the stopper member 12 is an appropriate value, FIG.
As shown in FIG. 3, the rope 9 is not slackened and a predetermined tension is applied to the rope 9 so that each sheet restraining member 2 can move the sheet 1 to the sludge layer 1 at the position of each stopper member 12.
Press it to 5.

When the rope length from the sinker 6 to the stopper member 12 is not an appropriate value and the slack is generated as shown in FIG. 6 (a), the tension applied to the rope 9 is smaller than a predetermined value and the seat 1 May float above the surface of the sludge layer 15. In this case, pull up the rope 9 until the slack of the rope 9 disappears as shown in FIG. 6 (b), until the stopper member 12 contacts the reinforcing belt. The rope tension is adjusted to a predetermined value by lowering and fixing it. When the rope 9 is too tight and the seat 1 gets stuck in the sludge layer, the reverse operation to the above is performed to adjust the tension applied to the rope 9 to a predetermined value.

FIG. 7 shows another embodiment of the present invention. In this embodiment, after adjusting the tension of each of the sinker hanging ropes 9 as described above, the portion 9a of each rope 9 protruding on the seat 1 is projected on any one of the adjacent seats 1. The portion 9a 'is coupled with a suitable means such as a wire clip. The two rope portions 9a, 9 thus joined
The sheet 1 is restrained in a portion other than the portion restrained by each stopper member 12 by a ', and the effect of preventing the sheet 1 from rising can be enhanced.

In each of the above embodiments, the wire clip is used as the stopper member 12, but the stopper member 12 is not limited to this, and other known or novel fasteners can be used.

In FIG. 2, the cut-off wall 1 of the sheet 1
An asphalt zone 17 is formed at a portion in contact with the sheets 3 and 14 to seal the space between the sheet 1 and the deadlines 13 and 14. In addition, a mat 18 that serves as an underlay of the cut-off dam and is permanently used is laid in a section where the cut-off dams 13 and 14 are extended and finally closed. Sheet 1 laid in this way
Will be removed and removed after the deadline is completed.

8 to 10 show another embodiment of the present invention. 8 to 10, the same components as those of the embodiment of FIGS. 1 to 7 are designated by the same reference numerals and detailed description thereof will be omitted.

Each sheet 1 in the embodiment of FIGS.
The sheets are sequentially laid so that their side edge portions are overlapped with each other. In the embodiment shown in FIGS. 8 to 10, the sheet 1 is composed of the sheet body 20 and the connection sheet 21 for connecting the adjacent sheet bodies 20. Become. A plurality of cords 22 are fixed to the side edge portion of the seat body 20, and a plurality of cords 23 are also fixed slightly behind them. On the other hand, a pair of wrapping cloths 24, 24 are attached to the connection sheet 21 in parallel with the side edges of the sheet body 1 by means such as adhesion and stitching.
It is fixed at 1. The wrap cloth 24 is provided with a string passing hole 24a on the fixed end side thereof, and a string passing ring 24b is attached to the side edge portion on the free end side thereof. The strings 22 and 23 of the seat body 20, the string passing hole 24a and the string passing ring 24b of the wrapping cloth 24 of the connecting sheet 21 constitute a connecting means for connecting the sheet body 20 and the connecting sheet 21. A rope insertion hole 5 is formed in the connection sheet 21. Reference numeral 25 is a buoy for holding the rope in an upright state when the seat pressing member 2 is sunk.

In order to lay the seat 1 on the water bottom, first, the rope 9 for suspending the sinker of the seat restraining member 2 is inserted through the rope insertion hole 5 of the connection sheet 21, and the rope 9 is provided with an elastic seal 10, a washer 11, and a stopper. The member 12 and the buoy 25 are attached to the bottom of the water. Then, as shown in FIG. 9, the sinker 6 sinks into the sludge layer 15 and sits on the support layer 16 such as a sand layer, and the connection sheet 21 sits on the surface of the sludge layer 15.

Next, the adjacent sheet bodies 20-1 and 20-2 are sequentially laid so that the side edges thereof overlap the connection sheet 21, and the side edges of the sheet body 20 are connected to the connection sheet 21 and the wrapping cloth 24. Each string 22 fixed to the seat body through the corresponding string passing hole 24a of the wrapping cloth 24 of the connecting sheet 21 and each string 23 through the corresponding string passing ring 24b.
The sheet body 20 and the connection sheet 21 are joined by tying 2 and the tip of the string 23 on the wrap cloth 24.

Next, the elastic seal 10, the washer 11, and the stopper member 12 are lowered on the rope 9 to fix the stopper member 12 at a position where the tension applied to the rope 9 reaches a predetermined value.

FIG. 10 shows a modification of the embodiment shown in FIG. In the embodiment of FIG. 10, the same components as those of FIG. 8 are designated by the same reference numerals, and the description thereof will be omitted.

In the embodiment shown in FIG. 10, the hook 2 is used as a connecting means instead of the rear string in the seat body 20.
6 is attached, while in the connecting sheet 21, a string 27 is attached instead of the string passing ring of the wrap cloth 24. In this embodiment, the string 22 is passed through the string passing hole 24a, and the string 27 is passed through the hook 26.
The string 22 and the string 27 are tied together on the wrap cloth 24 to join the sheet body 20 and the connection sheet 21.

In each of the embodiments shown in FIGS. 8 to 10, the connecting means is not limited to the above-mentioned means using a string, a ring, a hook, etc. For example, eyelets are formed on both the sheet 20 and the connecting sheet 21. Then, the seat body 20 and the connection sheet 21 are joined by a string that alternately passes through the eyelets, or a fastening metal fitting such as a buckle is attached to the seat body 2.
It is also possible to use other coupling means such as those provided on both 0 and the connection sheet 21.

[0037]

As described above, according to the present invention, the sheet restraining member comprising the sinker and the suspender for suspending the sinker is used to restrain the laid sheet, and the suspender for suspending the sinker is used. Since the tension applied to the suspension was adjusted to a predetermined value by adjusting the position of the stopper member that can adjust the position on the suspension material, the sheet was securely pressed against the surface of the sediment layer and sludge and sludge caused by tidal current It is possible to effectively prevent the winding of the equal deposit.

Further, an elastic seal having a hole having a diameter smaller than that of the suspender for hanging the sinker is arranged adjacent to the suspending member insertion hole, and when the suspending member is inserted into this hole, the suspending member is suspended. Deposits such as sludge and sludge are prevented from flowing out above the sheet through the gap between the lower material insertion hole and the hanging material.

Further, after adjusting the tension of each suspender for suspending sinker, the portion of each suspending member protruding on the sheet is projected on the sheet of the suspending member of any one of the adjacent sheet restraining members. When the sheet is joined to the portion, the sheet is held by the joined hanging member, and the seat is prevented from rising in the portion other than the portion held by the sheet restraining member.

When the sheet is constituted by a connecting sheet for connecting adjacent sheets to the main body and a hanging member through hole is formed in the connecting sheet, the sheet restraining member is previously sunk together with the connecting sheet, By connecting the main body to the connection sheet later, the connection work of the sheets can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a sheet restraining member used in the present invention.

FIG. 2 is a plan view showing a state in which a sheet is laid.

FIG. 3 is a plan view showing an example of a sheet.

FIG. 4 is a side sectional view showing a state in which the sheet is laid on the water bottom.

5 is a view on arrow AA in FIG. 1. FIG.

FIG. 6 is a diagram showing a method for adjusting the tension of a rope for hanging a sinker.

FIG. 7 is a perspective view showing an example in which ropes for suspending a sinker are connected to each other.

FIG. 8 is a perspective view showing another embodiment of the present invention.

FIG. 9 is a view for explaining the implementation method of the embodiment.

FIG. 10 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 sheet 2 sheet restraining member 3 sheet material 4 reinforcing belt 5 rope insertion hole 6 sinker 9 sinker hanging rope 10 elastic seal 12 stopper member 20 sheet body 21 connection sheet 22, 23, 24a, 24b, 26, 27 coupling means

Claims (6)

[Claims] 1. A seat in which a suspension member insertion hole is formed at an appropriate position, a sinker suspension suspension member inserted in the suspension component insertion hole, and the sinker suspension suspension member coupled to the sinker suspension suspension member. A sheet pressing member made of a sinker, and a stopper member which is attached at an arbitrary position above the seat and which is attached to an arbitrary position of the suspender for suspending the sinker and which can adjust a position on the hanging member. A device to prevent scouring and pollution of water bottom sediments in the characteristic deadline work. 2. An elastic seal having a hole having a diameter smaller than that of the hanging member for hanging the sinker is arranged adjacent to the hanging member insertion hole, and the hanging member is inserted into the hole. The device according to claim 1, characterized in that 3. After adjusting the tension of each suspender for suspending sinkers, the portion of each suspender projecting on the sheet is projected on the sheet of the suspending material of any one of the adjacent sheet restraining members. The device according to claim 1 or 2, characterized in that the device is connected to the existing part. 4. The sheet comprises a sheet body and a connection sheet for connecting adjacent sheet bodies, and the edge portion of the sheet body and the connection sheet are provided with a coupling means for coupling the sheet body and the connection sheet. The device according to claim 1 or 2, wherein the hanging member insertion hole is formed in the connection sheet. 5. The suspender for suspending sinker is inserted into the suspending member insertion hole of the connection sheet, and the stopper member is attached to an arbitrary position of the suspender for suspending sinker, and the connecting means is used. The device according to claim 4, characterized in that the connection sheet and an adjacent sheet body are joined together. 6. A seat having a suspending member insertion hole formed at an appropriate position and a seat restraining member made of a sinker and a suspender for suspending a sinker attached to the sinker are prepared, and the seat suspending member is provided. The sinker suspension hanging member of the sheet restraining member is inserted into the lower member insertion hole, and a stopper member capable of adjusting the position on the suspending member is attached to an arbitrary position of the sinker suspending hanging member, After the seat and the seat restraining member are sunk on the water bottom of the required area, the position of the stopper member on each sinker suspension suspension is adjusted to adjust the tension of the sinker suspension suspension to a predetermined value. A method for preventing scouring and pollution of water bottom sediment in a deadline construction, which is characterized by the above.