JP5676192B2 - Bottoming-type pollution control device and method for adjusting the length of the pollution control curtain of this device - Google Patents

Description

  The present invention relates to a bottomed pollution prevention device used for grab dredging work and the like, and a method of adjusting the length of a pollution prevention curtain of this device.

  The bottomed pollution prevention device is required to suppress the diffusion of pollution generated when performing grab dredging or sanding work in a water area such as the sea to the surrounding water area. 1 is a bottomed pollution prevention device, 1 is a rectangular floating body (float) that surrounds the sea surface of the construction area, 2 is a pollution prevention curtain hanging from the floating body 1, and 3 is the above pollution A pipe or chain provided over the entire periphery of the lower end of the prevention curtain 2, 4 is a plurality of lifting winches provided on the floating body 1, and 5 is a lifting wire for the lifting winch 4. The length of 2 is adjusted so that the lower end of the pollution control curtain 2 reaches the bottom 6.

  However, the conventional bottom-type pollution control device monitors the tide level at all times, and when the tide level rises, as shown in FIG. 14, between the lower end of the curtain 2 and the water bottom 6. In order to prevent contamination from coming out from the gap, it is necessary to lengthen the curtain 2 by operating the lifting winch 4 and lower the lower end of the curtain. When the tide level is lowered, as shown in FIG. 15, in order to prevent the curtain 2 from bumping and entanglement with a grab (not shown), the length of the curtain 2 is adjusted to the lifting winch. It is necessary to operate 4 to shorten it.

  When the bottom of the sea is inclined, the operator investigates the condition of the bottom of the sea, operates each lifting winch according to the inclination, and the curtain of the curtain 2 corresponding to each lifting winch. It is necessary to adjust the length of each part.

  Further, when the sea bottom is deformed by excavation of the sea bottom, a gap is formed between the curtain 2 and the water bottom 6, so that an operator needs to constantly monitor the sea bottom deformation.

  As described above, it is necessary for the worker to constantly monitor the tide level and the state of the seabed and adjust the length of the corresponding curtain part with each lifting winch, which increases the number of management items for the worker and increases the work efficiency. There was a problem.

  The present invention eliminates the above-mentioned drawbacks.

  The bottomed pollution control device of the present invention includes a floating body surrounding a sea surface portion of a construction area, a pollution prevention curtain hanging from the floating body, a curtain bottom detection means provided at a lower end of the pollution prevention curtain, and the pollution prevention. From the curtain length adjusting means, the tide level measuring means, the bottom / non-bottom information from the curtain bottom detecting means, and the tide level information from the tide level measuring means, the feeding amount of the pollution prevention curtain is calculated. It is characterized by comprising a storage arithmetic processing device that performs an operation.

  Further, there is a plurality of the bottom detection means and the length adjustment means, and each bottom detection means is linked to one or more of the length adjustment means.

  In addition, the method of adjusting the length of the pollution control curtain of the bottomed pollution control device of the present invention is provided at a floating body surrounding the sea surface portion of the construction area, a pollution prevention curtain hanging from the floating body, and a lower end of the pollution prevention curtain. Curtain bottom detection means, pollution prevention curtain length adjustment means, tide level measurement means, bottom / non-bottom information from the curtain bottom detection means, and tide level information from the tide level measurement means The length of the pollution control curtain of the bottomed pollution control device comprising the memory calculation processing device for calculating the feeding amount of the pollution control curtain is increased by operating the length adjusting means, When the first step of lowering the lower end and after the elapse of a desired time, the curtain bottom detection means detects whether or not the lower end of the curtain is bottomed and is judged to be bottomed When the length adjustment means is stopped, the tide level is measured by the tide level measurement means, the tide level is stored as first tide level information in the storage arithmetic processing unit, and it is determined that the bottom has not been reached. After the desired time elapses, the curtain bottom detection means again detects whether the lower end of the curtain is bottomed or not, and this is repeated until it is determined that the lower end of the curtain is bottomed, When it is determined that the bottom is reached, the length adjusting means is stopped, the tide level is measured by the tide level measuring means, and the tide level is stored in the storage arithmetic processing unit as first tide level information. After the process and a desired time have elapsed, the curtain bottom detection means detects whether or not the lower end of the curtain is bottomed. means The tide level is measured, and this tide level is stored as second tide level information in the storage arithmetic processing unit. The storage arithmetic processing unit uses the stored first tide level information and the second tide level information to When the length adjustment means is operated based on this calculation, and it is determined that it is not bottomed, the first step and the second step are performed. And the fourth step of repeating the third step.

  In addition, the method of adjusting the length of the pollution control curtain of the bottomed pollution control device of the present invention is provided at a floating body surrounding the sea surface portion of the construction area, a pollution prevention curtain hanging from the floating body, and a lower end of the pollution prevention curtain. A plurality of curtain bottom detection means, one or a plurality of curtain length adjustment means for adjusting the length of the corresponding curtain part of the anti-pollution curtain, which is linked to each of the curtain bottom detection means, and the tide level Curtain portion of the length adjusting means corresponding to each curtain bottom detection means from the measurement means, bottom / non-bottom information from each curtain bottom detection means and tide level information from the tide level measurement means By operating the length adjusting means, the length of each curtain portion of the pollution control curtain of the bottomed pollution control device comprising the storage arithmetic processing device for calculating the feed amount of The first step of lowering the lower end of the curtain part and after the elapse of a desired time, the curtain bottom detection means detects whether or not the lower end of the curtain is bottomed. If there is the determined bottom detection means, the length adjustment means corresponding to the bottom detection means is stopped, the tide level is measured by the tide level measurement means, and the tide level is stored as the first tide level information. If there is a bottom detection means stored in the processing apparatus and determined not to have bottomed, the curtain bottom detection means again after a desired time has elapsed for the bottom detection means and the corresponding curtain portion. Detect whether the bottom edge of the curtain is bottomed or not, and repeat this until it is determined that the bottom edge of the curtain part is bottomed. A second step of stopping the length adjusting means, measuring the tide level by the tide level measuring means, and storing the tide level as first tide level information in the storage arithmetic processing unit, and after each desired time, The bottom detection means detects whether or not the lower end of the curtain is bottomed, and if there is a bottom detection means determined to have bottomed, the tide level is measured by the tide level measurement means, The tide level is stored as second tide level information in the storage arithmetic processing device, and the storage arithmetic processing device uses the stored first tide level information and the second tide level information to respond to the landing detection means. If there is a bottom detection means that calculates the amount of feeding and feeding of the curtain part to be operated and operates the length adjusting means based on this calculation, and determines that the bottom is not bottomed, the bottom detection means and this Compatible with The curtain portion is characterized by comprising a third step for performing the first step and the second step, and a fourth step for repeating the third step.

  The curtain bottom detection means is provided at the lower end of the pollution prevention curtain and can be tilted in a vertical direction, a tilt switch fixed to the tilting member, and tilting that restricts the tilting member from tilting more than a desired amount. It is characterized by comprising regulating means.

  According to the bottomed pollution prevention apparatus of the present invention, there is a great advantage that it is not necessary for the operator to constantly monitor the tide level for adjusting the length of the pollution prevention curtain.

  In addition, even if the bottom of the sea is inclined, the bottom end of the entire pollution control curtain can automatically reach the bottom of the water. The bottom edge of the curtain will reach the bottom of the water. In addition, the curtains do not wrap around the grab.

It is explanatory drawing of the bottom type pollution prevention apparatus of this invention. It is a perspective view of the bottom detection sensor of the bottom type pollution control device of the present invention, It is explanatory drawing of the bottom type pollution prevention apparatus of this invention. It is a flowchart of operation | movement of the bottom type pollution prevention apparatus of this invention. It is explanatory drawing of the bottom type pollution prevention apparatus of this invention. It is explanatory drawing of the other Example of the bottom type | mold pollution prevention apparatus of this invention. It is explanatory drawing of the other Example of the bottom type | mold pollution prevention apparatus of this invention. It is a perspective view for explanation of other examples of the bottom detection sensor of the bottom type pollution control device of the present invention. It is a vertical side view for description of other Examples of the bottom detection sensor of the bottom type pollution control apparatus of this invention. It is a vertical side view for description of other Examples of the bottom detection sensor of the bottom type pollution control apparatus of this invention. It is a vertical side view for description of further another embodiment of the bottom detection sensor of the bottom type pollution control device of the present invention. It is a vertical side view for description of further another embodiment of the bottom detection sensor of the bottom type pollution control device of the present invention. It is explanatory drawing of the conventional bottom type pollution prevention apparatus. It is explanatory drawing of the conventional bottom type pollution prevention apparatus. It is explanatory drawing of the conventional bottom type pollution prevention apparatus.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the bottomed pollution control device of the present invention surrounds a sea surface portion of a construction area in a rectangular shape and has an annular floating body 7 that floats on the sea, and pollution prevention that hangs down from the entire circumference of the floating body 7. The curtain 8, a pipe or chain 9 provided over the entire lower end of the pollution prevention curtain 8, the bottom detection sensors 10 provided at the four corners of the lower end of the pollution prevention curtain 8, and the length of the pollution prevention curtain 8 For adjusting the height, a curtain raising / lowering winch 11 such as an air drive provided on each side of the rectangular floating body 7 spaced apart from each other, the raising / lowering wire 12 of the raising / lowering winch 11, and the raising / lowering wire 12, a feed length measuring device 13 such as a rotary encoder for measuring a feed length, a tide level measuring device 14 for measuring a tide level using, for example, a water pressure gauge installed in or near the construction area, A storage arithmetic processing unit that stores bottom / non-bottom information from the detection sensor 10 and tide level information from the tide level measuring device 14 and calculates a feed-in amount (expansion / contraction amount) of the pollution prevention curtain from the information. 15, a transmitter / receiver 16 provided in the tide level measuring device 14, a transmitter / receiver 17 provided in the storage arithmetic processing device 15, and a bottom detection lamp 18 that visually informs the bottoming status of the bottom detection sensor 10. And more.

  In addition, the bottom detection sensor 10 includes, as shown in FIG. 2, for example, a disc portion 19 having a size that does not sink under the bottom of the water, and an open top surface fixed to the center of the top surface of the disc portion 19. A cylindrical magnet container 20, a magnet 21 fixed to the bottom of the container 20, and a columnar proximity that has an upper end attached to the lower or lower end of the pollution prevention curtain 8 and a proximity sensor 22 at the lower end. It consists of a sensor support 23 and three wires 24 for attaching the disk portion 19 to a state where it is suspended from the lower part of the proximity sensor support 23.

  Further, the attachment position and length of the three wires 24 are adjusted so that the proximity sensor 22 is accommodated in the container 20, and the proximity sensor support 23 is inclined with respect to the disc portion 19. However, the proximity sensor 22 is prevented from being extremely separated from the magnet 20.

  The bottom detection sensor 10 is configured to indicate OFF when the magnet 21 and the proximity sensor 22 are separated from each other by a desired amount, and to indicate ON when the magnet 21 is closer than the desired amount. The lower end descends underwater, the disc portion 19 of the bottom detection sensor 10 first settles on the bottom, the wire 24 loosens as the lower end of the curtain descends, and the proximity sensor 22 is applied to the magnet 20 by a desired amount. When approaching and the bottom detection sensor 10 is turned on, it is determined that the lower end of the pollution prevention curtain has landed on the water bottom 6.

  Further, as shown in FIG. 3, the bottom detection sensor 10 is interlocked with, for example, two adjacent lifting winches. That is, based on the information from the first landing detection sensor 10a, the first lifting winch 11a and the eighth lifting winch 11h are operated, and based on the information from the second landing detection sensor 10b, the second lifting winch 11b and the second lifting winch 11b are operated. The third winch 11c is operated, the fourth winch 11d and the fifth winch 11e are operated based on the information from the third bottom detection sensor 10c, and the sixth winch is determined based on the information from the fourth bottom detection sensor 10d. 11f and 7th winch 11g are set to be operated.

  8 and 9 show another embodiment of the bottom detection sensor 10 described above. In another embodiment, the bottom detection sensor 10 includes a tilting member 25 that is provided on a pipe or chain 9 at the lower end of the pollution prevention curtain 8 and that can tilt in the vertical direction, and a tilt switch 26 that is fixed to the tilting member 25. And a stopper 27 for restricting the tilting member 25 from tilting more than a desired amount.

The tilting member 25 includes a mounting bracket 29 provided on the pipe or chain 9 at the lower end of the pollution prevention curtain 8 via a wire or shackle 28, and a frame portion 30 provided on the mounting bracket 29 so as to be tiltable in the vertical direction. The mounting bracket 29 is formed in a U-shaped cross section, and through holes 31 are provided in the folded pieces 29a and 29a of the mounting bracket 29, respectively, and a shackle 28 is formed on the upper surface of the horizontal portion 29b of the mounting bracket 29. A mounting bracket 32 is provided.

  The frame portion 30 includes two L-shaped steels 33 provided so as to face each other at a desired distance, a rod-shaped member 34 provided between the L-shaped steels 33, 33, and the two A bottoming plate 35 for connecting the L-shaped steels 33, 33 and the rod-shaped steel 34 on one end side, a weight 36 for connecting the two L-shaped steels 33, 33 and the rod-shaped member 34 on the other end side, The rod-shaped member 34 includes a pivot shaft 37 having a diameter smaller than the diameter of the through hole 31 of the mounting bracket 29, which connects the two pieces 33 a and 33 a of the L-shaped steels 33 and 33 facing each other. The tilt switch 26 is fixed to the mounting bracket 29 through the fixing band 38, the pivot shaft 37 is inserted into the through hole 31 of the mounting bracket 29, and the tilting member 25 is perpendicular to the mounting bracket 29. Pivoted freely That.

  The mounting position of the pivot shaft 37 with respect to the bent piece 33a of the L-shaped steel 33 is such that when the tilt member 25 is pivotally supported with respect to the mounting bracket 29, one end side of the tilt member 25 is Install so that it tilts downward.

  Further, when the tip of the tilting member 25 reaches the bottom of the water, the bottoming plate 35 prevents the end of the L-shaped steel 33 or the rod-shaped member 34 from sticking into the bottom of the water, so that the tilting member 25 does not tilt. Other members may be used as long as they can prevent the sticking to the bottom of the water.

  The tilt switch 26 is a sensor that indicates OFF when the tilting member 25 is tilted more than the desired amount, and indicates ON when tilted below the desired amount, for example, when it is parallel to the water bottom. There are float switches. Reference numeral 39 denotes a cable for transmitting ON / OFF information of the tilt switch to the storage arithmetic processing unit 15.

  The weight 36 is for inclining the tilting member 25 so that the other end side of the tilting member 25 is always lowered and the tilt switch 26 is raised when the bottom is settled. If the other end is lowered, it may not be provided.

  As shown in FIGS. 11 and 12, wires 40 a and 40 b may be provided in addition to the stopper 27 or instead of the stopper 27. The wire 40a has one end of the wire 40a connected to the pipe or chain 9 and the other end connected to one end of the rod-shaped member 34. The wire 40a is slack when the inclined member 25 is not inclined more than a desired amount, but the desired amount The tilting member 25 does not tilt more than a desired amount so as to be stretched when tilted, and the wire 40b connects one end of the wire 40b to the pipe or chain 9, and the other end is a rod-shaped member. 34 is connected to the other end, and the tilting member is slack when the tilting member is tilted in a direction in which one end faces downward, but the length is such that the tilting member 25 is stretched when the tilting member 25 is horizontal to the horizontal plane. The tilting member 25 is prevented from tilting in the direction in which the other end faces downward.

  The bottom detection sensor 10 of the other embodiment indicates OFF when the tilt switch 26, that is, the tilting member 25 is tilted more than a desired amount, and is ON when, for example, parallel to the water bottom. The lower end of the curtain descends in water, the one end side of the tilting member 25 of the bottom detection sensor 10 first settles, and the tilting amount of the tilting member 25 decreases as the lower end of the curtain descends. When the tilting member 25, that is, the tilt switch 26 becomes horizontal with respect to the water bottom and is turned ON, it is determined that the lower end of the pollution prevention curtain has reached the water bottom 6.

  Moreover, the length of each curtain part adjusted by each said raising / lowering winch 11a-11h is operated as follows according to the flow of FIG. 4, for example.

First, from the initial state where the curtain parts whose lengths are adjusted by the lifting winches 11a to 11h are not all settled on the bottom of the water,
(1) The memory calculation device 15 determines whether or not tide level data is obtained from the tide level measuring instrument 14.

  (2) If it is determined that the tide level data is not obtained in the determination of (1) above, the operating status of the transmission lines such as the tide level measuring device 14 and the transceivers 16 and 17 is confirmed. After operating correctly, the operation returns to the operation (1).

  (3) In the determination of (1) above, if it is determined that the tide level data has been obtained, the storage arithmetic processing unit 15 operates the winch air valve of each lifting / lowering winch to Increase the length and lower the lower end of each curtain part.

  (4) After a desired time has elapsed, it is detected whether each of the bottom detection sensors is ON or OFF.

  (5) In the determination of (4), if there is a bottom detection sensor for which the bottom detection sensor is determined to be ON, the bottoming at this time is measured while measuring by the feeding length measuring device 13. From the length of the curtain part of each lifting winch corresponding to the detection sensor, the length of the curtain part is further increased by the wave height fluctuation (α), and the corresponding lifting winch is stopped.

  (6) If there is a bottom detection sensor that is determined to be OFF in the determination of (4), the bottom detection sensor and each lifting winch corresponding thereto are again displayed after a desired time has elapsed. Whether each of the bottom detection sensors is ON or OFF is detected, and this is repeated until it is determined that the lower end of the curtain portion is bottomed. 13, from the curtain length of each lifting winch corresponding to the bottom detection sensor at this time, the length of the curtain portion is further increased by the wave height fluctuation (α), and the corresponding lifting winch is Stop it.

  Note that α is not the fluctuation of the tide level, but the pollution prevention curtain is lifted by the fluctuation of the wave and the gap between the bottom edge of the pollution prevention curtain and the bottom of the water is not created. To lower.

  In addition, when it is determined that the bottom detection sensor is ON, the corresponding lifting winch is stopped once, and the corresponding lifting winch of the bottom detection sensor is operated again from there to measure the feeding length. While measuring with the vessel 13, the length of the curtain portion may be lengthened by the wave height fluctuation (α) to stop the corresponding lifting winch.

  (7) Then, in the above (4) and (6), each tide level when each of the bottom detection sensors 10a to 10d is determined to be ON is defined as a (a1, a2, a3, a4) The storage calculation processing device 15 stores the corresponding bottom detection sensors 10a to 10d.

  The tide level a1 is the tide level when it is determined that the bottom detection sensor 10a is ON, the tide level a2 is the tide level when it is determined that the bottom detection sensor 10b is ON, and the tide level a3 is the bottom detection sensor. The tide level when it is determined that 10c is ON, and the tide level a4 is the tide level when it is determined that the bottom detection sensor 10d is ON.

  However, when there are few fluctuations in the tide level, etc., the tide level a when it is determined that the reference bottom detection sensor is ON is used as the tide level when it is determined that the other bottom detection sensor is ON. Also good.

  (8) Next, after the elapse of a desired time, it is detected whether each of the bottom detection sensors 10a to 10d is ON or OFF.

  (9) If there is a bottom detection sensor determined to be OFF in the determination of (8) above, the winch air valve of each lifting winch is operated on the bottom detection sensor and each corresponding lifting winch. Then, the length of each curtain part is lengthened, and the operation returns to the operation (3) in which the lower end of each curtain part is lowered.

  (10) If there is a bottom detection sensor determined to be ON in the determination of (8), the tide level at this time is stored as b in the storage arithmetic processing unit 15.

  (11) Then, the storage arithmetic processing unit 15 calculates whether the value obtained by subtracting the corresponding tide level a of the bottom detection sensor from the stored tide level b is greater than 10 cm, for example.

  The above 10 cm is an example value for absorbing an error of a tide level fluctuation or the like, and may be set to 20 cm depending on the sea area, time, or the like.

  (12) If it is determined in the determination of (11) that it is large, the length of the curtain part corresponding to the bottom detection sensor is set to (b−a) cm while measuring by the feeding length measuring device 13. Then, the lifting / lowering winch is stopped, the tide level at this time is set as a, and the storage arithmetic processing unit 15 stores the tide level corresponding to the bottom detection sensor, and the operation returns to the operation (8).

  (13) If it is determined in the determination of (11) that the value is smaller, the value obtained by subtracting the corresponding tide level a of the stored bottom detection sensor from the tide level b is, for example, smaller than −10 cm. Is calculated by the storage arithmetic processing unit 15.

  Note that the above −10 cm is an example value for absorbing an error of a tide level fluctuation or the like, and may be set to −20 cm depending on the sea area, time, or the like.

  (14) If it is determined in the above (13) that the length is small, the length of the curtain part corresponding to the bottom detection sensor is set to (ab) cm while measuring by the feeding length measuring device 13. The raising / lowering winch is stopped only by shortening it, and the tide level at this time is set as a, and it is re-stored in the storage arithmetic processing unit 15 corresponding to the bottom detection sensor. Return.

  (15) If it is determined in the determination of (13) that the tide level is large, the tide level at this time is set as a and stored again in the storage arithmetic processing unit 15 corresponding to the bottom detection sensor. ) Return to the operation.

  Since the bottomed pollution control device of the present invention is configured as described above, for example, as shown in FIGS. 3 and 5, there is an inclined sea bottom surface 6b between the sea bottom surface 6a and the sea bottom surface 6c. When there is a height difference, all the lifting winches 11a to 11h are first operated, the lower ends of the curtain portions are lowered, and the third bottom detection sensor 10c and the fourth bottom detection sensor 10d first reach the bottom. Upon detection, the fourth elevating winch 11d and the fifth elevating winch 11e sandwiching the third bottom detection sensor 10c, and the sixth elevating winch 11f and the seventh elevating winch 11g sandwiching the fourth bottom detection sensor 10d are stopped. (STOP).

  Further, the eighth lifting winch 11h and the first winch 11a sandwiching the first bottom detection sensor 10a, the second lifting winch 11b and the third lifting winch 11c sandwiching the second bottom detection sensor 10b correspond to each other. The first bottom detection sensor 10a and the second bottom detection sensor 10b are driven (RUN) until they bottom, and the lower end of the corresponding curtain part is lowered, and the first bottom detection sensor 10a and the second bottom detection are detected. When the sensor 10b detects bottoming, the eighth lifting winch 11h, the first lifting winch 11a, the second lifting winch 11b, and the third lifting winch 11c are stopped.

  6 and 7, in addition to the bottom detection sensors 10 at the four corners at the bottom of the curtain, a bottom detection sensor 10 is further provided in the middle of each side of the bottom of the curtain, for a total of eight landings. The case where it is set as the bottom detection sensors 11a-11h is shown.

  Also in this case, in the same manner as described above, the corresponding lifting winches are operated according to the respective bottom detection sensors 11a to 11h. For example, when the sea bottom near the fifth bottom detection sensor 10e sinks due to excavation. Since the fifth bottom detection sensor 10e does not detect the bottom detection, only the first lifting winch 11a and the second lifting winch 11b sandwiching the fifth bottom detection sensor 10e are driven (RUN), and the lifting winch. When the lower end of the curtain part corresponding to 11a, 11b descends and the fifth bottom detection sensor 10e detects bottoming, the first lifting winch 11a and the second lifting winch 11b stop.

  According to the bottomed pollution control device of the present invention, the bottom end of the bottomed pollution control device settles on the water bottom automatically according to the tide level and the shape of the sea bottom, and the diffusion of the pollution to the outside. Since it can be prevented at all times, there is a great advantage that it is not necessary for the worker to constantly monitor the tide level.

  In addition, even if the bottom of the sea is inclined, the bottom end of the entire pollution control curtain can automatically reach the bottom of the water. The bottom edge of the curtain will reach the bottom of the water. In addition, the curtains do not wrap around the grab.

  Instead of providing the storage arithmetic processing unit 15 in the floating body 7, it may be installed on a ship or the ground, and a transmitter / receiver may be provided in the floating body 7 to operate each lifting winch.

  Moreover, it is good also as a shape which surrounds only a part of construction area, without making the upper floating body 7 cyclic | annular.

  Also, the number of each bottom detection sensor and the number of each lifting winch are increased / decreased, and each bottom detection sensor and each lifting winch are linked in an arbitrary combination. Each lifting winch may be lifted or lowered by a desired amount.

  In addition, when the floating body 7 is a rectangle, it is preferable to provide a bottom detection sensor in at least four corners of the lower end of the curtain.

DESCRIPTION OF SYMBOLS 1 Floating body 2 Pollution prevention curtain 3 Chain 4 Lifting winch 5 Lifting wire 6 Water bottom 7 Floating body 8 Pollution prevention curtain 9 Chain 10 Bottom detection sensor 11 Lifting winch 12 Lifting wire 13 Feeding length measuring device 14 Tide level measuring device 15 Memory arithmetic processing device 16 Transmitter / receiver 17 Transmitter / receiver 18 Bottom detection lamp 19 Disc portion 20 Container 21 Magnet 22 Proximity sensor 23 Proximity sensor support 24 Wire 25 Tilt member 26 Tilt switch 27 Stopper 28 Shackle 29 Mounting bracket 29a Folding piece 29b Horizontal portion 30 Frame Part 31 Through-hole 32 Suspension fitting 33 L-shaped steel 33a Folded piece 34 Bar-shaped member 35 Bottoming plate 36 Weight 37 Pivot shaft 38 Fixed band 39 Cable 40a Wire 40b Wire

Claims (6)

  A floating body surrounding the sea surface portion of the construction area, a pollution prevention curtain hanging from the floating body, a curtain bottom detection means provided at the lower end of the pollution prevention curtain, a length adjustment means of the pollution prevention curtain, and a tide level measurement means And a storage operation processing device for calculating the amount of feeding of the anti-pollution curtain from the bottom / non-bottom information from the curtain bottom detection means and the tide level information from the tide level measurement means. A unique bottom-type pollution control device.   2. The bottom according to claim 1, wherein there are a plurality of the bottom detection means and the curtain length adjustment means, and each bottom detection means is linked to one or more of the length adjustment means. Type pollution prevention device. The curtain bottom detection means is provided at the lower end of the pollution prevention curtain and can be tilted in a vertical direction, a tilt switch fixed to the tilting member, and tilting that restricts the tilting member from tilting more than a desired amount. The bottomed pollution control device according to claim 1, further comprising a regulating means. A floating body surrounding the sea surface portion of the construction area, a pollution prevention curtain hanging from the floating body, a curtain bottom detection means provided at the lower end of the pollution prevention curtain, a length adjustment means of the pollution prevention curtain, and a tide level measurement means And a storage calculation processing device for calculating the amount of feeding of the anti-contamination curtain from the bottom / non-bottom information from the curtain bottom detection means and the tide level information from the tide level measurement means. A first step of operating the length adjusting means to increase the length of the pollution prevention curtain of the water pollution prevention device and lowering the lower end of the curtain;
After the desired time has elapsed, the curtain bottom detection means detects whether the bottom edge of the curtain is bottomed or not,
When it is determined that the bottom is reached, the length adjusting means is stopped, the tide level is measured by the tide level measuring means, and the tide level is stored as first tide level information in the storage arithmetic processing unit,
If it is determined that the bottom of the curtain has not been reached, the curtain bottom detection means again detects whether the bottom of the curtain is bottomed or not after the desired time has elapsed. When it is determined that it is bottomed, when it is determined that it is bottomed, the length adjusting means is stopped, the tide level is measured by the tide level measuring means, and this tide level is used as the first tide level information. A second step of storing in the storage arithmetic processing unit;
After the desired time has elapsed, the curtain bottom detection means detects whether the lower end of the curtain is bottomed or not,
If it is determined that the ground has reached the bottom, the tide level is measured by the tide level measuring means, the tide level is stored as second tide level information in the storage arithmetic processing unit, and the storage arithmetic processing unit stores the memory level. The first tide level information and the second tide level information are calculated to calculate the feeding amount of the curtain, and based on this calculation, the length adjusting means is operated,
If it is determined that the bottom is not reached, a third step of performing the first step and the second step;
A method for adjusting the length of a pollution control curtain of a bottomed pollution control apparatus, comprising: a fourth process that repeats the third process. A floating body surrounding the sea surface part of the construction area, a pollution prevention curtain hanging from the floating body, a plurality of curtain bottom detection means provided at the lower end of the pollution prevention curtain, and each curtain bottom detection means are interlocked with each other. One or more curtain length adjusting means for adjusting the length of the corresponding curtain part of the pollution prevention curtain, tide level measuring means, bottom / non-bottom information from each curtain bottom detection means, and the above A bottom-of-soil pollution control device comprising a storage arithmetic processing unit for calculating a feeding amount of a curtain portion of the length adjusting unit corresponding to each curtain bottom detection unit from a tide level information from a tide level measuring unit. A first step of operating the length adjusting means to increase the length of each curtain portion of the pollution control curtain and lowering the lower end of the curtain portion;
After the desired time has elapsed, the curtain bottom detection means detects whether the bottom of the curtain is bottomed or not,
If there is a bottom detection means determined to have bottomed, the length adjustment means corresponding to this bottom detection means is stopped, the tide level is measured by the tide level measurement means, and this tide level is It is memorized in the memory processing unit as tide level information,
If there is a bottom detection means that is determined not to have reached the bottom, the curtain bottom detection means and the curtain bottom detection means again touch the bottom end of the curtain after the desired time has elapsed. This is repeated until it is determined that the lower end of the curtain part is bottomed, and when it is determined that the bottom is bottomed, the corresponding length adjusting means is stopped. A second step of measuring the tide level by the tide level measuring means and storing the tide level as first tide level information in the storage arithmetic processing unit;
After the elapse of a desired time, the curtain bottom detection means detects whether the bottom of the curtain is bottomed,
When there is a bottom detection means determined to have bottomed, the tide level is measured by the tide level measurement means, and the tide level is stored as second tide level information in the storage arithmetic processing unit, and the storage arithmetic processing unit The apparatus calculates the feeding amount of the curtain portion corresponding to the bottom detection means from the stored first tide level information and the second tide level information, and based on this calculation, the length adjusting means is Let me operate
If there is a bottom detection means that has determined that the bottom has not reached, a third step for performing the first step and the second step for the bottom detection means and the corresponding curtain portion; ,
4. A method for adjusting the length of a pollution control curtain of a bottomed pollution control device, comprising: a fourth step that repeats the third step. The curtain bottom detection means is provided at the lower end of the pollution prevention curtain and can be tilted in a vertical direction, a tilt switch fixed to the tilting member, and tilting that restricts the tilting member from tilting more than a desired amount. 6. The method for adjusting the length of a pollution prevention curtain of a bottomed pollution prevention apparatus according to claim 4 or 5, characterized by comprising regulation means.

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