KR20010001893A - Drainger for improving weak foundation - Google Patents

Abstract

PURPOSE: A draining member for soft ground improvement is provided to easily absorb the reserve gap water in the ground even without applying a vertical load. CONSTITUTION: High absorptive fabric is continuously charged in drain holes(13,13') of a general plate type draining member to form a vertical draining member(10) covered with a filter(12) of high permeability. The high absorptive fabric is made of simple polyacryl or polyvinyl alcohol or by mixing with wool or cotton. The high absorptive fabric absorbs the reserve gap water in the ground and has a high absorptive function by capillarity. With the high absorptive fabric, a need of filling is eliminated. Further, with the capillarity, the horizontal drainage is possible.

Description

Soft ground improvement drainage {DRAINGER FOR IMPROVING WEAK FOUNDATION}

The present invention relates to a drainage type buried in the ground to absorb the excess pore water in the ground and drain it to the surface in order to increase the strength of the soft ground with a high water content, in particular its own high absorption without reloading soil or sand for horizontal drainage The present invention relates to a drainage material for soft ground improvement that sucks and drains only gap water as a function.

Drainage methods for improving soft ground such as landfills and low wetlands include paper drain, sand drain, and pack drain. These methods type drainage vertically to the ground, and reload the surface so that the excess pore water in the ground flows into the drainage by the vertical load of the filled soil, and rises above the surface along the drainage. To the location of the sump or drainage channel in the phase, the sand for horizontal drainage is laid and horizontal drainage of the pore water rising above the surface along the drainage.

Conventional general drainage material used for improving the soft ground is a plurality of continuous formed in the longitudinal direction while being disposed at regular intervals in the width direction on both sides of the synthetic resin plate (1) continuously extruded in a constant width as shown in Figure 1a and 1b It has the structure which has the drain opening 2 and the both sides of the board body 1 are surrounded by the filter 3 with favorable water permeability like a nonwoven fabric.

When the conventional general drainage material is buried vertically in the soft ground and buried again, the excess pore water in the ground is dissipated through the filter by the vertical load of the loaded soil and collected in the drains. Along the surface will rise to the top. On the other hand, in order to guide the raised pore water to the sump or the drainage side, the sand for horizontal drainage is installed at the upper part of the surface.

On the other hand, the present inventors have strengthened the drainage function by forming a water passage between the drain holes of the normal drain plate through the Utility Model Publication No. 94-6419 registered and filed in advance prior to the present application. That is, when the filter is partially damaged during the vertical type of drainage or in the installation or use thereof, the drainage function at the lower part of the drainage port is stopped when the filter is partially blocked to the adjacent drain port connected by the water passage. The solution is to strengthen the drainage function.

However, the conventional general drainage material or the improved drainage material by the prior application do not absorb and raise the pore water in the plurality of drainage holes themselves, and thus the reloading soil for the vertical load is applied to the upper part of the ground for the absorption and the rising. It is troublesome in construction and it takes a lot of manpower and time. In addition, in order to horizontally drain the gap water raised above the surface to the sump or the drainage path, a separate horizontal drainage sand is installed, which makes the work more cumbersome and expensive, and the environment is destroyed by the use of sand. Also pointed out.

On the other hand, the type group used to bury the vertical drainage type to be installed on the soft ground, if the water content is too much, it is difficult to transfer and install the type group, of course, the type of vertical drainage is difficult. Therefore, in this case, since a separate work that primarily increases the strength of the surface portion must be performed, the work is also cumbersome and the drainage work is delayed.

The main object of the present invention is to provide a soft ground improvement drainage material having a high water absorption function that can easily suck up excess pore water in the ground itself without acting a vertical load due to reloading.

Another object of the present invention is to separate horizontal drainage by having a horizontal drainage function together with a high function absorption function that can easily suck up excess pore water in the ground without acting on a vertical load due to reloading. The use of sand can also be ruled out. In particular, in order to increase the strength of the ground near the surface of the soft ground, which has a high water content, it is primarily intended to provide a drainage for the improvement of the soft ground.

1A and 1B are a perspective view and a cross-sectional view showing a partially cut vertical drainage material for conventional soft ground improvement.

Figure 2a and 2b is a partial cutaway perspective view and a cross-sectional view showing a vertical drainage according to the first embodiment of the present invention.

Figure 3 is a partially cutaway perspective view showing a horizontal drainage according to a second embodiment of the present invention.

Figure 4 is a partially cutaway perspective view showing a horizontal drainage of another form according to a third embodiment of the present invention.

Figure 5 is a vertical drainage model using the vertical drainage and horizontal drainage in accordance with embodiments of the present invention.

Figure 6 is a horizontal drainage model using a vertical drainage material according to a third embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: vertical drainage material 11: plate

12,22,33,34,35: Filter 13,13 ': Drainage

14,14 ', 21,31,32: Absorbing member 20,30: Horizontal drainage

In order to achieve the first object described above, the present invention constitutes a vertical drainage material by continuously filling superabsorbent fibers in a drain hole of a conventional drainage plate body and then covering a permeable good filter such as a nonwoven fabric around the plate body.

As the superabsorbent fibers, for example, polyacryl-based or polyvinyl alcohol-based synthetic fibers may be used alone or in combination with cotton, wool or the like. This superabsorbent fiber is an osmotic pressure acting between its own fine fiber ol and ol in the drainage plate of the drain plate and absorbs excess pore water in the ground, and absorbs the absorbed pore water by the capillary phenomenon between the fiber ol and the ol. It has a high absorption function to raise. Therefore, because the superabsorbent fiber itself has a superabsorbent function, the excess pore water in the ground is easily sucked up, so it is not necessary to reload the ground. In addition, the superabsorbent fibers will be able to horizontally multiply the vertically drained pore numbers by using capillary phenomenon that absorbs (moves) the pore water absorbed along its longitudinal direction.

Accordingly, in order to achieve the second object, the present invention forms a superabsorbent fiber as described above in a continuous shape with a constant width and thickness, and wraps it around with a filter having good water permeability such as a nonwoven fabric or the like. With the superabsorbent fibers shaped into a continuous shape with a constant width and thickness, the same circumference of the outer surface of both sides with the same width of the continuous resin scrubber or with a filter therebetween Sealing with a filter constituted a horizontal drainage material which was continuously shaped into a constant width and thickness.

The horizontal drainage material is directly buried in the horizontal direction, so it has the function of directly absorbing and draining the excess pore water in the ground, so that the ground strength near the soft ground surface within a depth of 1 ~ 2m is increased before the installation of the vertical drainage material. This can be useful. In addition, the horizontal drainage may be directly connected to the top of the vertical drainage in the horizontal direction, and may be used in place of the horizontal drainage sand for guiding the gap water vertically drained by the vertical drainage to the sump or the drainage side, and thus a separate horizontal drainage. The use of drainage sand can also be ruled out.

When described in detail with reference to the accompanying drawings, preferred embodiments of the drainage according to the present invention as follows.

Figures 2a and 2b of the accompanying drawings shows a vertical drainage material 10 according to the first embodiment of the present invention, the conventional resin plate body 11 and the plate 11 of the continuous extrusion molding to a constant width as usual It consists of a filter 12, such as a non-woven fabric on both sides, is disposed at regular intervals in the width direction on both sides of the plate 11 and has a plurality of drain holes (13, 13 ') formed continuously in the longitudinal direction, According to the present invention, the plurality of drain holes 13 and 13 'are provided with absorbing members 14 and 14' in which fine superabsorbent fibers are continuously filled.

As is well known, the fine superabsorbent fibers constituting the absorbent members 14 and 14 'may be made of polyacrylic or polyvinyl alcohol-based synthetic fibers alone, or cotton, wool, or the like may be used on the synthetic fibers. It is possible to use a mixture of fibers.

The plate body 11 of the vertical drainage material 10 according to the present invention as described above does not exclude that a water passage is formed between adjacent drains 13 and 13 'as improved by the applicant of the present invention. And may also be replaced by various types of plates as set forth in the earlier application.

Figure 3 shows a horizontal drainage material 20 according to a second embodiment of the present invention, fine superabsorbent fibers (polyacrylic or polyvinyl alcohol-based synthetic fibers alone or cotton or wool to the synthetic fibers The fibers mixed with the back) are formed into a continuous absorbent member 21 having a constant width and thickness, and then formed around the absorbent member 21 by covering a filter 22 such as a nonwoven fabric.

The absorbent member 21 of the horizontal drainage material 20 according to the second embodiment absorbs the excess pore water in the ground at an osmotic pressure acting on the ol and ol of fine superabsorbent fibers as described above, and at the same time, the capillary tube between the ol and ol. It is used instead of the horizontal drainage sand with the vertical drainage (FIGS. 1A and 1B) or the vertical drainage (FIGS. 2A and 2B) according to the first embodiment of the present invention because it guides the absorbed gap water in the longitudinal direction. Can be.

On the other hand, Figure 4 shows a horizontal drainer 30 of a more preferred form according to the third embodiment of the present invention. The first absorbent member 31 is formed by continuously processing a resin scrubber with a predetermined width and thickness, and the superabsorbent fibers (polyacryl-based or polyvinyl alcohol-based) that are continuously fine in the same width as the first absorbent member 31. Or a second absorbing member 32 formed by shaping the synthetic fiber of the fiber alone or by mixing cotton, wool, etc. in the synthetic fiber thereof, and the first and second absorbing members 31, 32) are composed of filters 33, 34, and 35, such as nonwoven fabric, which are enclosed so as to surround the outer surfaces of the first and second absorbing members 21 and 22 therebetween. Here, the filter 33 interposed between the first absorbing member 31 and the second absorbing member 32 may be removed.

While the first absorbing member 31 in the horizontal drainage material 30 according to the third embodiment is somewhat inferior in performance to the second absorbing member 32, while absorbing and draining the excess pore water in the ground in large quantities quickly, It is considered to absorb and drain even a small amount of gap water that cannot be drained from the first absorbing member 31.

Hereinafter, with reference to FIGS. 5 and 6, each model diagram for the vertical drainage and the horizontal drainage using the vertical drainage 10 and the horizontal drainage 20 or 30 implemented as described above is shown.

In the vertical drainage, as shown in FIG. 5, first, the collecting wells 41 and 41 'are provided at a sufficient depth in consideration of the drainage amount away from the position where the soft ground 40 is to be improved, and the submersible pump 42, 42 ') or general pump is installed. Then, in the soft ground 40, a plurality of vertical drainers 10 are buried vertically at regular intervals in a conventional manner, and the upper ends of each of the vertical drainers 10 slightly protrude above the surface of the ground. Then, the horizontal drainage 20 is connected to the upper end of the vertical drainage 10 protruding to the surface, and both ends thereof are provided to the sump wells 41 and 41 'provided at a distance from the improved position of the soft ground 40 as shown in the drawing. Install. The vertical drainage material 10 buried in the vertical type is then used as an arrow in the drawing as its own superabsorbing function of the absorbent members 14 and 14 'made of superabsorbent fibers continuously filled in the above-described respective drainage holes 13 and 13'. As shown, excess pore water in the soft ground 40 is sucked up. The gap water sucked up by the vertical drainers 10 is absorbed by the absorbent member 21 in the horizontal drainer 20 or 30 connected to the upper end thereof, and then guided horizontally along the absorbent member 21 to both ends thereof. The water is collected and collected in the collecting wells 41 and 41 'at both ends thereof. The gap water collected in the collection wells 41 and 41 'may be discharged to the outside using a general pump or an underwater pump 42 or 42' as shown.

In the vertical drainage model diagram, the horizontal drainage material 20 having only the absorbent member 21 of the superabsorbent fibers as shown in FIG. 3 is used for the horizontal drainage on the surface, but the first drainage as shown in FIG. And the horizontal drainer 30 having the second absorbing members 31 and 32 may be replaced.

Next, in the horizontal drainage, as shown in FIG. 6, open-drainage drainage paths 51 and 51 ′ are formed away from the improved position of the soft ground 50, and the horizontal drainage material 30 is formed in the soft ground 50. ) Is buried in the horizontal direction as shown in the drawing, and both ends thereof protrude above the surface and laid to face the drainage channels 51 and 51 '.

In the schematic diagram of such horizontal drainage, as indicated by the arrows in the figure, the absorption and drainage functions of the first and second absorbing members 31 and 32 themselves constituting the horizontal drainage material 30 embedded in the soft ground 50 are shown. The excess gap water is absorbed and drained to the drainage paths 51 and 51 '. At the initial stage, a large amount of gap water is quickly absorbed and drained by the first absorbing member 31 of the resin scrubber. When the number of gaps remaining in the soft ground 50 is small and the first absorbing member 31 does not function properly, it is easily drained by the high absorbing function of the second absorbing member 32 without leaving a small amount of the gap. . Therefore, this horizontal drainage model is suitable for the primary rapid improvement of the surface area of 1 ~ 2m depth when the vertical drainage is not easy to be buried. Of course, in the horizontal drainage model diagram, the horizontal drainage having the first and second absorbing members 31 and 32 is provided with the absorbing member 21 only of the fine superabsorbent fibers as shown in FIG. 3. It is also possible to use the drainage material 20.

On the other hand, although not illustrated in the drawings, the horizontal drainage (20, 30) can be used in place of the horizontal drainage sand as shown in Figure 5 and also the conventional vertical drainage (Fig. 1) or improved vertical drainage by the present application of the present inventors Of course, it can also be used directly in the vertical drainage model that vertically buried as well as vertical drainage.

As described through the above embodiments, the present invention directly fills the drainage of the existing vertical drainage plate with the absorbent member made of superabsorbent fibers or implements the drainage shaped by itself, thereby directly removing excess pore water in the ground without external action. It is to give a high absorption function to suck up and drain horizontally.

Therefore, it is possible to exclude the use of reloaded soils or sand for horizontal drainage for vertical load after draining vertically the drainage material for the improvement of soft ground, which drastically reduces the material cost and labor cost of landfill material and sand, It can be shortened, as well as to prevent the environmental damage caused by the use of landfill and sand.

Claims (6)

A plate body having one or more concave drain holes continuous in the longitudinal direction, a super absorbent fiber continuously absorbed in the drain hole of the plate body to absorb and transport the gap water in the ground in the longitudinal direction, and a gap water absorbed by the super absorbent fiber. A soft ground improvement drainage comprising a permeable filter wrapped around the plate to permeate and block foreign matter. The drainage material for soft ground improvement according to claim 1, wherein the superabsorbent fibers are made of polyacrylic or polyvinyl alcohol-based synthetic fibers alone or in combination with cotton or wool. And an absorbent member that continuously molds the superabsorbent fibers to a predetermined width and thickness to absorb and transport excess pore water in the ground, and a permeable filter that surrounds the permeate to absorb foreign material absorbed by the absorbent member and block foreign substances. Soft ground drainage. A first absorbing member which is processed by continuously processing a resin scrubber that absorbs and transports excess pore water in the ground to a certain width and thickness, and a second absorbing member which has shaped a super absorbent fiber in correspondence with one side of the first absorbing member. And a permeable filter encapsulated to surround each of the outer surfaces of the first and second absorbent members so as to permeate the gap water absorbed by the first and second absorbent members and block foreign substances. 5. The soft ground improvement drainage material according to claim 4, further comprising a permeable filter interposed between the first and second absorbing members to transmit the gap water. Vertical drainage material having vertically filled superabsorbent fibers continuously typed vertically buried in the ground to absorb excess pore water in the ground, and horizontally connected to the upper end of the vertical drainage material to convey the drained void water. A soft ground improvement drainage comprising a horizontal drainage continuously filled in the horizontal direction so as to.