JP5626680B2 - Drain material horizontal installation device on soft ground - Google Patents

Description

The present invention relates to a drain material horizontal installation device for soft ground in which a drain material is buried in a horizontal direction in a soft soil treatment site in which soft soil mainly composed of dredged soil is stored or in a soft ground in a landfill.

  Conventionally, in soft soil treatment plants where soft soil made of dredged soil has been stored and land improvement in landfills, drain material is buried in the soft ground with its length direction set in the horizontal direction, and the softness is passed through this drain material. A method of sucking out water in the ground is known (for example, Patent Document 1).

  In order to bury the drain material horizontally, as shown in FIG. 10, a work ship 103 carrying a reel 102 around which the drain material 100 is wound is floated on the water surface on the soft ground 101, and the soft under the work ship 103 is floated. A guide member 104 for embedding the drain material 100 is inserted into the ground 101, and the work boat 103 is moved in that state, and the drain material 100 is fed out from the rear side in the traveling direction of the guide member 104 to enter the soft ground 100. The drain material 100 is embedded with the drain material length direction oriented in the horizontal direction.

  This drain material 100 needs to be wound around the reel 102 for convenience of transportation, construction, etc., so that the width direction of the cross section is formed in a rectangular shape longer than the thickness direction, etc. In this way, a material that can be easily bent in the reel radial direction, that is, the thickness direction of the drain material cross section is used.

  Further, in order to feed the drain material 100 from the guide member 104 inserted into the soft ground 100 with its length direction directed in the horizontal direction, the direction of the drain material 100 is changed from the insertion direction of the guide member 104 to the horizontal direction. Therefore, the drain material is embedded with the thickness direction of the cross section that is easy to bend directed to the ground depth direction.

Japanese Patent Laid-Open No. 04-203011

  However, in the conventional technology as described above, since the drain material 100 is embedded with the thickness direction in the depth direction, the drain material 100 is easily bent in the ground depth direction due to the earth pressure in the soft ground 101. As shown in FIG. 12, it is difficult to make the distance in the ground depth direction between the drain materials 100, 100 at the respective points a, b constant, so that the consolidation does not settle uniformly at each point, and due to consolidation. There is also a possibility that the ground improvement effect may vary depending on each point, and as a result, there is a possibility that a part having a low ground improvement effect may occur.

In view of such a conventional problem, the present invention provides a drain material horizontal installation device on soft ground in which the drain material is embedded in a direction in which it is difficult to bend and the interval between the drain materials can be kept constant. It was made for the purpose.

The feature of the invention according to claim 1 for solving the conventional problems as described above and achieving an intended object is a guide member for feeding a drain material mounted on a work ship into soft ground, Drain material supply means for supplying the drain material to the guide member, and by moving the work ship in a state where the guide member is inserted into soft ground, the guide member is moved from the rear side in the working ship traveling direction. In the horizontal drainage device for drainage material in soft ground, the drainage material is laid out in such a manner that one or more drainage materials are fed out and the lengthwise direction of the drain material is buried in the soft ground. To draw a drain material having a surface width longer than the thickness from the guide member with the length direction oriented in the horizontal direction and the width direction oriented in the vertical direction of the ground. Comprising a twisting guide means, said drain member supply means, said drain member is supplied toward the work ship traveling direction the thickness direction, and the guide member, towards the width direction in the traveling direction of the work ship, The torsion guide means includes an introduction-side torsion guide member on the supply means side of the guide member for guiding the drain material supplied from the drain material supply means so that the width direction thereof is directed to the working ship traveling direction. The drain material horizontal installation apparatus is provided with a feeding-side torsion guide member on the tip side of the guide member that guides the material such that its length direction is in the horizontal direction and the width direction is in the vertical direction of the ground .

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the guide member includes movement assisting means for assisting movement of the drain material.

According to a third aspect of the present invention, in addition to the structure of the second aspect , the movement assisting means is a sliding material having a low frictional resistance disposed inside the guide member.

According to a fourth aspect of the present invention, in addition to the configuration of the second aspect, the movement assisting means is a guide roller arranged along a direction in which the guide member guides.

  Further, the drain material horizontal installation device according to the present invention includes a guide member for feeding the drain material mounted on the work boat into the soft ground, and a drain material supply means for supplying the drain material to the guide member. Then, by moving the work ship in a state where the guide member is inserted into the soft ground, one or a plurality of the drain materials are fed out from the rear side in the work ship traveling direction of the guide member, and the work is moved into the soft ground. In a drain material horizontal burying device for soft ground, where the length direction of the drain material is embedded in the horizontal direction, the length of the drain material whose width of the drain material cross section is longer than the thickness is A twist guide means for directing the horizontal direction and extending the width direction from the guide member in the vertical direction of the ground. The emission material may be installed as difficult bending in soil depth.

  Furthermore, in the present invention, the torsion guide means guides the drain material to the distal end side of the guide member so that the length direction of the drain member is directed in the horizontal direction and the width direction is directed to the vertical direction of the ground. By providing the twist guide member, the direction of the drain material can be smoothly changed.

  In the present invention, since the width direction of the guide member is directed to the traveling direction of the work ship, the resistance of the guide member from the soft ground is small, and the work can be performed smoothly.

  Further, in the present invention, the drain material supply means supplies the drain material with its thickness direction directed toward the work ship traveling direction, and the torsion guide means is provided on the supply means side of the guide member from the drain material supply means. By providing an introduction-side torsion guide member that guides the supplied drain material so that its width direction is in the direction of the work vessel, the guide member can be directed in a direction with less resistance from soft ground. Work can be done.

  Furthermore, in this invention, the said guide member can aim at the direction change smoothly by providing the movement assistance means for assisting the movement of the said drain material.

  Further, in the present invention, the movement assisting means is a sliding material having a low frictional resistance disposed inside the guide member, or the movement assisting means is disposed along the direction in which the guide member guides. By using the guide roller, the direction can be smoothly changed.

(A) is a side view which shows an example of the drain material installation apparatus based on this invention, (b) is the same rear view. It is a perspective view which shows an example of the drain material used for this invention. It is a side view which shows the outline of the twist guide member in FIG. It is a side view which shows the outline of another example of the twist guide member same as the above. (A) is a side view which shows another example of the drain material installation apparatus based on this invention, (b) is the same rear view. FIG. 6 is a side view showing an outline of a feeding side torsion guide member in FIG. 5. It is a side view which shows the outline of the drain material embedding process of the horizontal installation method of the drain material which concerns on this invention. It is a cross-sectional view which shows the installation state of the drain material by this invention. It is a side view which shows the other Example of the drain material installation apparatus which concerns on this invention. It is a side view which shows the outline of the horizontal burial process of the conventional drain material. It is a cross-sectional view which shows the installation state of the drain material by a conventional method. It is a longitudinal cross-sectional view same as the above.

  Next, an embodiment of the drain material horizontal installation device according to the present invention will be described based on the embodiment shown in FIGS. In addition, the code | symbol 10 in a figure is a soft ground.

  The drain material horizontal installation device includes a guide member 12 for feeding the drain material 2 mounted on the work boat 11 to the soft ground 10 under the work boat, and the guide member 12 is inserted into the soft ground 10. By moving the work ship 11 and feeding out the drain material 2 from the guide member 12, the drain material 2 can be embedded in the soft ground 10 with its length direction oriented in the horizontal direction.

  The work ship 11 has a twin-hull type hull 13, and the hull 13 is configured to accommodate a float such as polystyrene foam.

  For example, the work ship 11 has tow wire ropes 14 and 15 connected to the front and rear of the hull, and has both winch wire ropes 14 and 15 installed on opposite shores of the soft soil container. It is possible to move to the embedding direction side by performing the winding and unwinding operation.

  Further, the work boat 11 is provided with a pedestal 17 for mounting a drain reel 16 constituting a drain material supply means on the upper surface of the hull, and is rotatably supported on the pedestal 17 via a bracket 18. A plurality of drain reels 16 are arranged at intervals in the hull width direction.

  The drain material 2 is wound around each drain reel 16, and the drain material 2 fed out from each drain reel 16 toward the front of the hull is directed through the guide roller 19 in the thickness direction in the traveling direction of the work boat. Are supplied to the guide member 12.

  The bracket 18 is provided with a driving means (not shown) for rotating the drain reel 16, and the drain reel 16 can be rotated by this driving means so that the drain material 2 can be automatically fed out.

  As the drain material 2, for example, a rectangular plastic drain whose width direction length shown in FIG. 2 is longer than the thickness direction length can be used. A plurality of water passages 5, 5... In the longitudinal direction are formed inside by pasting the water permeable materials 4, 4, and external water passes through the water permeable material 4 and the water passages 5, 5. ... and flow into it.

  The shape of the core material may be a cross-sectional wave shape, a triangular wave shape, a saw blade shape, or the like other than the above-described square wave shape.

  The drain material 2 is passed through the guide member 12 and passed through the torsion guide means so that the length direction thereof is directed in the horizontal direction and the width direction thereof is extended in the vertical direction of the ground. ing. In addition, the vertical direction of the ground includes not only the direction matching the ground depth direction but also the oblique vertical direction.

  The guide member 12 is formed in a rectangular tube shape whose thickness is smaller than the width, and the torsion guide means is provided with a feeding side torsion guide member 21 at the tip end side of the guide member, and the drain material 2 is formed by the feeding side torsion guide member 21. The length direction is directed in the horizontal direction and the width direction is extended in the vertical direction.

  The feeding-side torsion guide member 21 has a shape in which a main body portion of the guide member 12 and an introduction portion 21a formed in a continuous arrangement and a lead-out portion 21b from which a drain material is fed are connected by a twisted bending tube portion 21c. Is formed. In the figure, reference numeral 20 denotes a feeding hole.

  As shown in FIG. 3, guide rollers 22, 22... Are arranged in the supply side torsion guide member 21 along the direction in which the drain material 2 is guided. , 22, the movement in the feeding side torsion guide member is assisted by passing the drain material 2 between them, and the drain material 2 is twisted at the same time as being twisted.

  Further, as shown in FIG. 4, in the feeding side torsion guide member 21, sliding materials 23, 23. As a means, it may be affixed to the inner surface of the feeding side torsion guide member.

  On the other hand, the guide member 12 may direct the width direction to the course direction of the work ship as shown in FIG. 5 in addition to the above-described embodiment.

  In this case, the torsion guide means 30 is provided with the introduction side torsion guide member 31 so as to be positioned above the soft ground surface of the guide member 12, and is provided with a feeding side torsion guide member 32 on the front end side of the guide member.

  The introduction-side torsion guide member 31 is formed in a tubular shape in which the introduction portion on the drain material supply means side and the lead-out portion on the feeding portion side are twisted in a perpendicular direction, and the drain material 2 is passed through the torsion guide tube 31. Thus, the direction of the width direction of the drain material 2 is rotated by 90 degrees.

  Therefore, since the drain material 2 fed from the drain reel 16 is turned 90 degrees with the thickness direction in the traveling direction and the width direction is directed in the traveling direction, it is inserted into the guide member 12 with the width direction directed in the traveling direction. can do. At this time, the guide member 12 can be installed in a stable state because the resistance received from the soft ground 10 is reduced by directing its width direction in the course direction.

  On the other hand, as shown in FIG. 6, the payout side torsion guide member 32 is formed in a cylindrical shape extending toward the rear side in the course direction of the work ship, and the drain in a state where the width direction is directed to the course direction of the work ship. The material 2 is bent through a feed roller 33 installed in an oblique direction so that the length direction of the drain material 2 is directed in the horizontal direction and the width direction is directed in the vertical direction of the ground. ing.

  In the case where the guide member 12 is installed with the width direction thereof directed in the course direction of the work ship, the drain reel 16 may be installed so that the drain material 2 is directed in the course direction of the work ship.

  Next, a horizontal burying method of the drain material 2 according to the present invention using the drain material horizontal burying apparatus described above will be described with reference to FIGS.

  In order to embed the drain material by the method of the present invention, first, the work ship 11 is floated on the water surface on the soft ground 10, and the traction wire rope 14 and the pulling traction wire rope 15 are connected to the front and rear of the hull 13.

  Then, the drain reel 16 that is lifted up by a crawler crane or the like and wound up the drain material 2 while being in contact with one shore side is mounted on the work ship 11.

  Next, the drain material 2 is fed out from each drain reel 16 and supplied to the guide member 12 via the guide roller 19. The supplied drain material 2 is guided by the guide member 4 and is fed out with its length direction set in the horizontal direction. At this time, the drain material 2 is subjected to bending and twisting through the feed-side torsion guide member 21 constituting the torsion guide means. The operation so far is performed in a state where the guide member 12 is accommodated between the twin bodies of the hull 13 and the opening of the guide member 12 is exposed on the water surface.

  After the operation so far is completed, the guide member 12 is inserted into the soft ground 10 to a predetermined depth at a position close to the embedding start side bank.

  Next, the drain material 2 is unwound from the drain reel 16 and the drain material 2 is unwound from the guide member 12 to the rear side in the advancing direction of the guide member 12. Move towards the side.

  At this time, the drain material 2 is bent and twisted through the guide member 12 and the feed-side torsion guide member 21 constituting the direction changing means, and the length direction is directed horizontally, and the width direction is set to the upper and lower sides of the ground. It is fed out from the feed-out guide member 21 in the direction.

  Then, by moving the work boat 11 to the embedment end position, the drain material 2 is embedded up to the end position with the length direction directed in the horizontal direction and the width direction directed in the vertical direction of the ground.

  Next, the guide member 12 is pulled up, the pulling wire rope 15 is pulled up by the winch, and the work ship 11 is moved toward the embedding start side.

  Then, as shown by a broken line in the figure, the insertion position of the guide-side torsion guide member 21 of the guide member 12 with respect to the soft ground 10 is changed, and the above-mentioned process is repeated, and the drain is spaced apart in the ground depth direction of the soft ground 10. Materials 2, 2 ... are installed in a multi-stage arrangement.

  Since the drain materials 2, 2... Installed in this way are difficult to bend in the depth direction of the ground, it is difficult for the drain material 2 to be bent in the ground depth direction even when the drain material 2 is buried or when the ground is subsidized due to consolidation. The distance in the ground depth direction between the materials 2, 2... Can be kept constant, and the consolidation settlement amount at each point of the soft ground 10 can be made uniform.

  In addition to the above-described embodiment, the drain material horizontal installation device includes a plurality of guide members 12, 40, 41 having different lengths as shown in FIG. A plurality of drain members 2, 2... May be installed in parallel arrangement at intervals in the ground direction by changing the position. In addition, the same code | symbol is attached | subjected to the structure same as the above-mentioned Example, and description is abbreviate | omitted.

2 Drain material 3 Core material 4 Water permeable material 5 Water passage 10 Soft ground 11 Work ship 12 Guide member 13 Hull 14, 15 Tow wire rope 16 Drain reel 17 Base 18 Bracket 19 Guide roller 20 Feed hole 21 Feed torsion guide member 22 Guide Roller 30 torsion guide means 31 introduction side torsion guide member 32 feeding side torsion guide member 33 feeding rollers 40 and 41 guide member

Claims (4)

A guide member for feeding the drain material mounted on the work ship into the soft ground; and a drain material supply means for supplying the drain material to the guide member; and the guide member is inserted into the soft ground. By moving the work ship, one or a plurality of the drain materials are fed out from the rear side of the guide member in the work ship traveling direction, and the drain material is oriented in the horizontal direction in the soft ground. In the drain material horizontal burying device to the soft ground that is supposed to be buried,
Torsion guide means for feeding out the drain material having a width of the drain material cross section longer than the thickness from the guide member while directing the length direction in the horizontal direction and the width direction in the vertical direction of the ground. Prepared,
The drain material supply means supplies the drain material with its thickness direction directed toward the work ship traveling direction, and the guide member directs its width direction toward the work ship traveling direction,
The torsion guide means includes an introduction-side torsion guide member on the supply means side of the guide member for guiding the drain material supplied from the drain material supply means so that the width direction thereof is directed to the working ship traveling direction. A soft ground comprising a feed-side torsion guide member for guiding a material so that its length direction is directed horizontally and the width direction is directed to the vertical direction of the ground. Drain material horizontal installation device. The drain material horizontal installation device according to claim 1 , wherein the guide member includes a movement assisting unit for assisting the movement of the drain material. The apparatus for horizontally installing a drain material on soft ground according to claim 2 , wherein the movement assisting means is a sliding material having a low frictional resistance disposed inside the guide member. The apparatus for horizontally installing a drain material on a soft ground according to claim 2 , wherein the movement assisting means is a guide roller arranged along a direction in which the guide member guides.

Images