KR100793178B1 - Apparatus for preventing cold weatherdamage installed at the softground for supporting a ballast of railroad - Google Patents

Abstract

An apparatus for preventing cold weather damage installed at the soft ground to support a ballast of a railroad is provided to increase support force, and to support the ballast effectively by draining moisture or underground water contained in the soft ground through a sand mat and underground drain films to the outside. A pebble ballast(13) is installed on the ground, and a sleeper(12) is installed on the pebble ballast. Rails(11) are fixed to the sleeper to mount a railroad(10). A sand mat(30) is laid on the soft ground. Underground water drain films(40) are inserted in the sand mat, and the two sides of the underground water drain films are exposed to the outside. The two exposed ends of the underground water drain films are exposed to draining holes(15) formed on the both sides of the ballast. The sand mat is manufactured with a high strength geotextile(32) to be a bag shaped mat. The sand mat is filled with sands(31).

Description

Apparatus for preventing cold weatherdamage installed at the softground for supporting a ballast of railroad}

  1 is a view showing the overall installation of the anti-donghae device of the present invention on the soft ground.

        Figure 2 is installed on the soft ground of the present invention to prevent the installation of groundwater drainage film in the sand mat of the size corresponding to the gravel island width, and installed so that both ends of the groundwater drainage film penetrated exposed to the drain hole Showing drawings.

        Figure 3 is a view showing the groundwater drainage film of the present invention.

       Figure 4 is to install a plurality of sand mats across the gravel island width as another embodiment of the anti-donghae device of the present invention, through the groundwater drainage film and installed so that both ends of the groundwater drainage film installed through the exposure to the drain hole Showing drawings.

       Figure 5 is a view showing the connector as a whole interconnecting the sand mat of the device for preventing the damage of the present invention.

       Figure 6 is a view showing the installation of the connector for interconnecting the sand mat, which is a device for preventing the damage of the present invention.

       FIG. 7 is a view showing that a plurality of sand mats are installed on a soft ground as another embodiment of the apparatus for preventing a sea hazard of the present invention and interconnected by using a connector for interconnecting sand mats in four directions.

       Figure 8 is another embodiment of the East Sea prevention apparatus of the present invention, while inserting the ground water drainage film in a plurality of pillars of sand installed on the soft ground, the sand mat is installed thereon, the ground water purchase film installed in the sand pillar is a sand mat Figure showing that the contact portion formed in contact with the ground water drainage film inserted through.

  <Explanation of symbols for the main parts of the drawings>

         w; Phase width

         10; Railway tracks 11; rail

         12; Sleepers 13; Gravel

         14; Ground

         20; Donghae prevention device

         30; Sand mat 31; sand

         32; Geotextile

         40; Groundwater drainage film 41; film

         42; Through-hole

         50; Connector 51; Square frame

         52; Corner portion 53; Vertical section

         54; Triangular projection 55; Insert

  60; Sand pillar 61; Contact

According to the present invention, when the railway is inevitably laid on a soft ground containing a large amount of groundwater or a large amount of groundwater, the soft ground is frozen in winter by moisture contained in a large amount of soft ground, and a phenomenon such as frost foot occurs in the ground. When the earth and sand that make up the ground are lifted up, when the heavy train runs on the rail track, the soft ground that was supporting the gravel road is subsided, and the rail track is also settled, causing the vehicle running on the rail track to derail. In order to prevent such accidents, the East Sea prevention device was installed on the soft ground.

        In general, silt or viscous soils are not only supportive but also contain a large amount of water at the same time. So, when the temperature drops sharply during winter and lasts for several days or months, it is generally about 0.6 ~ 1m from the ground surface. This freezing effect, particularly in the case of soft ground containing a large amount of water is a phenomenon that the soil is raised by the needle-like ice crystals such as frost feet lifted up by the moisture contained.

        The phenomenon of earth and sand lifting up is literally lifted up the soil that forms the ground, and when heavy loads are loaded on it, the sedimentary ice crystals are broken and the raised soil is collapsed at once. You will not be able to expect at all.

        In order to prevent this phenomenon, the soft ground is removed by using the sand composed of a certain particle size, which is relatively less affected by freezing, but the bearing capacity can be maintained, and the soft ground filled with sand is replaced with sand.

        However, replacing the soft ground with sand to a certain depth as described above has the concern that the construction cost will be improved due to the expensive material cost of sand and the difficulty of transporting sand to the site is practical. There is a disadvantage that does not apply.

        Therefore, the present invention is to produce a bag having a certain area and height with high-strength geosynthetic fiber and then filled with sand made of a certain particle size that is hardly affected by freezing, and penetrates the filled sand to ground water drainage film such as polyethylene Insert and install at least one sand mat so that both ends of the film is installed to protrude out of the sand mat, the sand mat is made to fit the width of the gravel map, and the produced sand mat on the soft ground Or install sand mats with a certain area on the ground of a plurality of soft grounds in accordance with the gravel width, or spread sand mats in the longitudinal direction, or according to the gravel width on the soft ground. A plurality of drill holes having a constant depth at regular intervals are installed in the longitudinal direction, and sand is injected into the drill holes. While filling, install the groundwater drainage film vertically, expose one end to a certain length to the outside, and install the sand mat in the longitudinal direction on the soft ground where the sand column is installed, or install a plurality of sand mats according to the gravel width. It is installed so as to be installed in the longitudinal direction while being installed. It is installed vertically on the sand pillar so that one end thereof has a contact portion in close contact with the groundwater drainage film exposed to the outside and the groundwater drainage film inserted through the sand mat installed thereon. In addition, the groundwater drainage film protruded to the outside through the installed sand mat is the East Sea (凍害) prevention device to be exposed to the drains installed on both sides of the gravel road.

A sand mat is installed on a soft ground containing a lot of ground water or water, and introduced into the gap between sand in the sand mat by surface tension and capillary phenomenon on the ground water drainage film installed in the sand mat. Groundwater or moisture generated on the soft ground under the gravel road by allowing the water contained in the groundwater or the soft ground, which is the pore water, to be drained by the groundwater drainage film installed on the surface of the groundwater drainage film to be exposed to drains on both sides. It is drained to the outside to reduce the water content so that the soft ground is less affected by freezing, while the sand composed of a certain particle size is hardly affected by freezing, so the bearing capacity is maintained by the sand mat installed at the lower part of the gravel road. Train deviation caused by weakening of bearing capacity by freezing. It prevented the railway roadbed maintenance work while being prevented in advance.

The present invention has been proposed in order to improve the above problems, to produce a mat from geosynthetic fibers having a certain area and height, while filling the self-drainage film while filling it with sand composed of a certain particle size less affected by freezing After inserting through the sand mat and installing it on the soft ground, the water contained in the soft ground or groundwater generated in the underground is drained to the outside by the groundwater drainage film, and freezes even in winter by the sand packed in the sand mat. Effortlessly supporting the railroad tracks supported by gravel roads installed on the soft ground with little effect, and simply installing the unit mat and laying on the soft ground when installing on the soft ground The purpose of the present invention is to provide a soft ground preventing device for simplicity.

Hereinafter, described in detail by the accompanying drawings of the present invention.

     FIG. 1 is a view showing the installation of a sand mat, which is a device for preventing a sea damage, on a soft ground supporting a gravel road and exposing the groundwater drainage film inserted through the sand mat to drains installed at both sides, and FIG. As an example of the mat, the ground mat drainage film inserted through the sand mat in the sand mat while making the width of the sand mat to extend in the longitudinal direction in the longitudinal direction to correspond to the width of the gravel map Figure 3 is a view to be installed protruding to both sides, Figure 3 is a view showing the formation of groundwater drainage film inserted through the sand mat, Figure 4 is a small width of the sand mat as compared to the gravel bed width of the plurality of gravel bed width Showing the installation on the soft ground in the longitudinal direction as well, 5 is a view showing the connector as a whole for interconnecting the sand mats installed on the soft ground so that the sand mats installed on the soft ground are installed at a designated position, Figures 5 and 6 show the connector of FIG. The sand mats are interconnected to be installed at a predetermined position on the soft ground, and FIG. 8 is a view showing a device for preventing the damage of the east sea, and a hole having a predetermined depth on the soft ground corresponding to the width of the gravel diagram. Perforate in the longitudinal direction to maintain a constant interval, and install the ground water drainage film vertically while installing the sand column filled with sand in the perforated hole, once protruded to the outside on the soft ground, and then sand Inserted into the sand mat while installing the mat protrudes the groundwater drainage film on both sides and is installed in the drain opening, Donghae (한), which is installed on the column and made contact with the groundwater drainage film exposed to the outside and the groundwater drainage film inserted in the sand mat, so that the water contained in the groundwater or the soft ground is discharged to the outside. Figure showing another embodiment of the prevention device.

According to the present invention, when the railway is inevitably laid on the soft ground 14 having a lot of groundwater or a large amount of ground water, the soft ground is frozen in winter by moisture contained in a large amount of the soft ground 14 and then frost in the ground soil. As a phenomenon such as feet occurs, the earth and sand constituting the ground is lifted upward, and when the heavy train runs on the railroad track 10, the soft ground 14 supporting the gravel road 13 sinks and At the same time, the rail track 10 is also settled to prevent accidents such as derailment of the vehicle running on the rail track 10,

        The high-strength geosynthetic fiber 32 is fabricated into a bag-shaped mat to have a constant area and height, and the groundwater drainage film 40 is inserted through the sand 31 having a predetermined granularity which is less affected by freezing. The sand mat 30 is prepared.

        The manufactured sand mat is installed on the soft ground 14 to drain the water contained in the soft ground 14 or groundwater generated in the ground to the outside by the groundwater drainage film 40, The sand (31) is filled with little effect of freezing even in winter, so as to efficiently support the rail track 10 supported by the gravel phase 13 installed on the soft ground (14).

        In addition, even when the sand mat 30 is installed on the soft ground 14, the unit mat simply transports and installs on the soft ground 14 so that it is easy to transport and install it.

        As shown in FIGS. 1 and 2, a bag having a predetermined area and height is made of high-strength geotextiles 32, and then filled with sand 31 having a predetermined granularity that is hardly affected by freezing. By inserting one or more groundwater drainage film 40, such as polyethylene, through the sand 31 to produce a sand mat 30 so that both ends of the film 40 protrude out of the mat. Groundwater 30 is made to fit the width W of the gravel drawing 13 and is continuously installed in the soft ground 14 in a longitudinal direction, while being inserted into the sand mat 30 and protruded on both sides. Both ends of the drainage film 40 will be the East Sea (배수) prevention device 20 to be installed exposed to the drain 15 formed on both sides of the gravel drawing (13).

        As another embodiment, as shown in FIG. 4, the sand mat 30 having a predetermined area is installed on the plurality of soft grounds 14 so that the sand mat 30 is installed in the longitudinal direction while matching the gravel island width (W). Is inserted into each of the sand mat 30 is installed through the ground water drainage film 40 protruding to a certain length on both sides of the sand mat 30 located on both sides, but the projected ground water drainage film 40 ) Will be the East Sea (凍害) prevention device 20 to be installed to the drain port 15 installed on both sides of the gravel phase (13).

        As another embodiment, as shown in FIG. 8, a plurality of perforation holes having a predetermined depth are provided in the soft ground 14 at regular intervals at regular intervals according to the gravel drawing width W, and the sand 31 is formed in the perforation holes. While installing the groundwater drainage film 40 vertically while filling the installation, the sand pillars 60 having one end exposed to a predetermined length outside the perforation hole are installed, and the sand mat on the soft ground 14 on which the sand pillars 60 are installed. (30) is installed in the longitudinal direction, or installed in the longitudinal direction while installing a plurality of sand mats 30 in accordance with the gravel island width (W), and installed vertically to the sand pillar (60) One end is installed to have a contact portion 61 in close contact with the ground water drainage film 40 inserted through the ground water discharge film 40 and the sand mat 30 installed thereon, and the sand mat ( 30) Protrude outward through the inside To a ground water drainage film 40 is in the East Coast (凍害) protection device 20 to expose the drain port 15 installed on both sides of a gravel ballast (13).

        1, 2 and 4 and 8 is installed on the soft ground 14 to the sand mat 30 is made to fit the gravel bed width (W) in the longitudinal direction, or on the gravel bed width (W) While installing a plurality of sand mat 30 to fit, while installing the groundwater drainage film 40 through the installed sand mat 30 so as to be exposed to both sides of the sand mat 30 outside the gravel phase (13) Or to be exposed to drains 15 formed on both sides of the

        Alternatively, the sand pillar 60 is installed in the soft ground 14 and the ground water drainage film 40 is inserted into the sand pillar 60 so that the sand mat 30 is exposed to the outside, and then the sand mat 30 is sand pillar ( 60 is installed to be exposed on both sides through the sand mat 30 while forming a contact portion 61 in contact with the groundwater drainage film 40 inserted through the sand mat 30 while being installed on the soft ground 14 installed. Both ends of the groundwater drainage film 40 are exposed to drains 15 formed on both sides of the gravel drawing 13, and the gravel is laid at a predetermined height on the sand mat 30 on which the gravel drawing 13 is installed. After the installation, the sleeper 12 is installed thereon, the rail 11 is fixed to the sleeper 12 to install the railroad track 10 to install the railroad.

        6 and 7 show another embodiment in which the sand mat 30 is installed on the soft ground 14 according to FIGS. 1, 2, 4, and 8, and the connector 50 as shown in FIG. By using to interconnect the sand mat 30 to prevent the sand mat 30 installed on the soft ground 14 is moved to exert a stronger bearing force.

        That is, Figure 6 is installed adjacent to the sand mat 30 installed in the longitudinal direction in the longitudinal direction on the soft ground 14 to fit the sand mat 30 to the width (W) of the gravel track in the same manner as in FIG. Side surfaces of the sand mat 30 are to be inserted into the insertion portion 55 of the connector 50 of FIG. 5 so that the sand mat 30 is fixed by the connector 50,

        7 is a rectangular frame 51 of the connector 50 of FIG. 5 with the sand mat 30 installed in the longitudinal direction while installing a plurality of small sand mats 30 at the width W of the gravel drawing by FIG. Each inserting portion 55 installed in the four corner portion 52 of the sand mat 30 is installed in the four corners of the sand mat 30 is to be fixed and supported.

        When the connector 50 of FIG. 5 is described in detail, a rectangular frame 51 is formed of a metal or plastic material having a strength, and a triangle below the vertical portion 43 and the vertical portion 43 is formed on the four corner portions 52. The triangular protrusion 54 of the insertion portion 55 is to be installed.

        The triangular triangular protrusion 54 formed below the vertical portion 43 is inserted into the sand mat 30 by the triangular portions protruding to both sides while being easily inserted when inserted into the sand mat 30. It is to be prevented from being separated so that the sand mat 30 is firmly installed by the connector 50.

        Interconnecting with the connector 50, the sand mat 30 installed on the soft ground 14 can be easily moved by the soft ground (14) having a high fluidity, in particular, the weight of the load repeatedly in the rail track 10 If it acts as a soft ground (14) with the possibility of movement to prevent this is to be installed to be fixed by interconnecting the sand mat 30 is installed adjacent to the connector (50).

        Of course, in the case of FIG. 8 after the sand mat 30 is installed in accordance with the gravel island width (W) as shown in FIG. 2 or after the plurality of sand mats 30 are installed in the gravel island width (W) as shown in FIG. 4. The connector 50 of FIG. 5 is connected to each other in the same manner as in FIG. 6 or 7 to be fixed and supported.

        According to the geological characteristics of the soft ground 14 on which the railway is laid, it is possible to determine whether to use the connector 50.

        When summarizing and explaining the present invention, the gravel phase 13 is formed on the soft ground 14 which is a silty silt or viscous soil or groundwater containing a lot of water when the ground 14 is formed to install the railway. In the case of installation, the sand mat 30 is installed on the soft ground 14, the gravel phase 13 is installed thereon, the sleeper 12 is installed thereon, and the rail 11 is fixed to the sleeper 12. Install the railroad.

        If the sand mat 30 installed on the soft ground 14 is expected to move due to the fluidity of the soft ground, the sand mat 30 is connected to the connector 50 by the sand mat 30. Prevent movement on the soft ground (14).

        As described above, the sand mat 30 or the sand mat 30 is connected to each other by the connector 50, the ground water drainage film 40 through the sand mat 30 is inserted into both sides of the sand mat 30 Groundwater penetrated into the sand mat 30 by osmotic pressure and surface tension by sand 31 in the sand mat 30 by being exposed to drains 15 provided on both sides of the gravel drawing 13 while being exposed to the negative. The water is drained to the drain hole (15) by the ground water drainage film (40).

        In another method, as shown in FIG. 8, the sand pillars 60 are installed on the soft ground 14, and the ground water drainage film 40 is inserted into the sand pillars 60 so as to be exposed to the outside. 30 is installed on the soft ground on which the sand pillars 60 are installed, while forming the contact portion 61 in contact with the groundwater drainage film 40 inserted through the sand mat 30, and penetrates the sand mat 30 on both sides. Both ends of the groundwater drainage film 40 installed to be exposed are exposed to the drain holes 15 formed on both sides of the gravel drawing 13 so that the sand mat with osmotic pressure and surface tension by the sand 31 in the sand mat 30. The ground water and water penetrated into the 30 are to be drained to the drain 15 by the ground water drainage film 40.

        Like all the methods listed above, the gravel phase 13 is installed on the sand mat 30 installed on the soft ground 14 at a predetermined height, and then the sleepers 12 are installed thereon, and the sleepers The rail 11 is fixed to the rail track 10 to install the railroad to install.

        The ground water drainage film 40 is formed in the form as shown in Figure 3, using a material such as polyethylene in the form of a film 41, and a certain size on the film surface so that moisture can easily move on the film 41 To form the through-holes 42 at regular intervals, or to form a narrow-sized projections (not shown) on both sides of the film 41, or at regular intervals in the film 41, While forming the through-holes 42 having a constant size, projections are formed on both sides.

        Forming the through-holes 42 or providing projections on the surface of the film 41 allows the capillary phenomenon and the surface tension phenomenon of the water to be more active.

        By forming projections or through-holes in the groundwater drainage film as described above, the function of draining the water in the soft ground is more active by riding on both sides of the groundwater drainage film to discharge the groundwater contained in the soft ground to the outside. In order to prevent the damage of the East Sea by reducing the content of water in the winter season while increasing the bearing capacity of).

        In addition, the ground water drainage film 40 is inserted through the sand mat 30 so that the compaction of the sand 31 is strengthened by the ground water penetrated into the sand mat 30 by the film 41. will be.

        In general, the dried sand is not supportive force, but the sand containing moisture is inserted into the groundwater drainage film 40 in the sand mat 30 in order to use the phenomenon that the bearing capacity is enhanced in the soft ground (14) at all times Moisture is to be introduced into the sand 31 in the sand mat 30 to maintain the support force

        In the case shown in FIG. 8, the perforated hole is drilled at regular intervals in the soft ground 14, and the sand pillar 60 is inserted with the groundwater drainage film 40 as shown in FIG. 3 in the center while filling the sand 31 therein. ) To expose one end of the groundwater drainage film 40 inserted into the sand pillar 60 on the soft ground 14, and on the soft ground 14 on which a plurality of sand pillars 60 are formed. The contact portion 61 interconnecting the groundwater drainage film 40 inserted through the sand mat 30 and the groundwater drainage film 40 exposed to the outside of the sand column 60 while laying the sand mat 30 is provided. The ground water contained in the sand column 60 moves upward through the ground water drainage film 40, and the groundwater naturally flows into the ground drainage film 40 horizontally installed in the sand mat 30 by the contact portion 61. Moves to the outside through the drain hole 15 installed on both sides of the sand mat 30 To be.

        As mentioned above, while allowing the sand mat 30 to be installed on the soft ground 14 in various ways, the groundwater drainage film 40 is exposed to the drain 15 installed outside through the sand mat 30. In the end, the groundwater contained in the soft ground 14 is easily discharged to the outside so that the soft ground has a bearing capacity, so that the soft ground is prevented by the sand mat during the winter season.

        Another reason is to continuously inject water into the sand 31 in the sand mat 30 so that the sand has a constant supporting force.

        In addition, the other reason is that when the soft ground (14) containing moisture in the winter is frozen, the soil is lifted up by the frost feet, which leads to a decrease in the bearing capacity.

        In order to prevent this phenomenon, in order to use the sand (31) which is hardly affected by the freezing of the winter season, to manufacture a mat that can hold sand easy to carry and install, sand mat filled with sand therein Will be used.

        If the sand 31 is to be directly laid on the soft ground 14 without using the sand mat 30, sand 31 should be transported to the site. Many sites have poor conditions such as difficult mountain areas or rivers, and therefore, sand (31) must be transported to these sites, which is difficult to transport, and therefore, excessive transportation costs are required, and also on the soft ground (14) of the site. Even if the sand 31 is directly laid, each grain of sand penetrates into the soft ground 14 due to the characteristics of the soft ground, and the expensive sand 31 is endlessly consumed. If sand (31) is directly installed on the ground, the heavy equipment cannot be installed because it is a soft ground without supporting force. Therefore, sand must be laid by manpower. In order to improve the problem that the overall construction cost is greatly increased, easy to transport, easy to install, and easy to manufacture sand mat 30 to be used as a device for preventing the sea damage (20).

        The present invention utilizes the optimal material properties to allow sand 31 to easily move moisture by capillary action and surface tension.

        The sand mat 30 provided on the soft ground 14 may be provided in a single layer, or may be provided by stacking the sand mat 30 in a plurality or more layers.

  As described above, stacking the sand mat 30 in a single layer or a plurality of layers or more may be provided with a variety of sand mats depending on the state of the soft ground 14 in the field.

The present invention is to produce a mat of geosynthetic fiber having a certain area and height, and to fill the sand mat composed of a certain particle size with less influence of freezing therein while manufacturing a sand mat inserted through the self-drainage film, soft ground It is installed on the ground so that the water contained in the soft ground or groundwater generated in the ground can be drained to the outside by the groundwater drainage film to strengthen the bearing capacity and at the same time, it is hardly affected by freezing even in winter by the sand packed in the sand mat. Easily transport and install the soft ground, which is easy to carry and install on the soft ground by simply carrying the unit mat even when installing on the soft ground, while efficiently supporting the rail track supported by the gravel road installed on the ground. It is

Claims (14)

In order to lay a railroad, the ground is formed, and the gravel is laid at a predetermined height on the ground, the gravel bed 13 is installed, the sleeper 12 is installed on the gravel bed, and the rail 11 is placed on the sleeper. In installing the railroad track 10 by installing the railroad tracks,      When the ground is a soft ground, the sand mat 30 is installed on the soft ground, and inserted into the installed sand mat, the groundwater drainage film 40 installed on both sides and the exposed groundwater drainage film exposed both sides. A device for preventing the damage of the east sea installed on the soft ground supporting the gravel road on which the railroad tracks are laid, characterized in that the stage is exposed to the drain holes 15 formed on both sides of the gravel roadway 13. The method of claim 1,         The sand mat 30 is made of a high-strength geosynthetic fiber 32 and made of a bag-shaped mat so as to have a constant area and height, and filled with sand 31 composed of a predetermined granularity which is less affected by freezing in the mat. An East Sea prevention device installed on the soft ground supporting the gravel road on which the railroad tracks are placed, characterized by inserting the film (40). The method of claim 1 While installing the sand mat 30 in accordance with the gravel road width (W) as a single rail track is characterized in that the installation of the sand mat 30 in the longitudinal direction in the longitudinal direction of the rail track 10 East Sea prevention device installed on soft ground supporting gravel road. The method of claim 1,   Characterized in that the sand mat 30 is installed in the longitudinal direction of the rail track 10 in the longitudinal direction while installing a plurality of sand mat 30 in accordance with the width (W) of gravel road The East Sea prevention device installed on the soft ground supporting the gravel road on which the railway tracks are installed. The method according to claim 1 or 2,   The ground water drainage film 40 is manufactured in the form of a film 41 using a material such as polyethylene, and a predetermined interval of the through-hole 42 having a predetermined size on the film surface so that moisture can easily move on the film 41. Or to form a narrow-sized protrusion (not shown) on both sides of the film 41, or at regular intervals on the film 41, to form a through hole 42 having a constant size. The East Sea prevention device installed on the soft ground which supports the gravel road on which the railway tracks are laid, characterized in that any one of the projections are formed on both sides while forming. The method according to claim 3 or 4,  Both sides or four sides of the laid sand mat 30 is connected to each other using the connector 50 to prevent the movement on the soft ground 14 to support the gravel road in which the railway tracks are laid. Donghae prevention device installed on the soft ground. The method of claim 6,  The connector 50 forms a rectangular frame 51 made of metal or a plastic material having strength, and has a triangular triangular protrusion portion 54 below the vertical portion 43 and the vertical portion 43 downwardly on the corner portion 52. ) Is a freeze preventing device installed on the soft ground supporting the gravel road on which the railroad tracks are placed, characterized in that the insertion portion 55 is installed. In order to lay a railroad, the ground 14 is formed, the gravel is laid at a predetermined height on the ground, and the gravel phase 13 is installed, and the sleeper 12 is installed on the gravel phase, and the rails on the sleeper In fixing (11) and installing railroad tracks 10 and laying railroad tracks,   When the ground is a soft ground, the drilled holes at regular intervals in the soft ground 14, the sand pillar 60 is inserted into the ground drainage film 40 in the center while filling the sand 31 in the drilling holes (60) To form, to expose one end of the groundwater drainage film 40 inserted into the sand pillar 60 on the soft ground 14, on the soft ground 14 is formed a plurality of sand pillars 60 The contact portion 61 interconnecting the groundwater drainage film 40 inserted through the sand mat 30 and the groundwater drainage film 40 exposed to the outside of the sand column 60 while laying the sand mat 30 is provided. Formed and inserted through the sand mat 30, the underground water drainage film 40 exposed to both sides is laid railroad tracks characterized in that exposed to the drain hole 15 formed on both sides of the gravel phase (13) East Sea prevention device installed on soft ground supporting gravel road. The method of claim 8,   The sand mat is made of a bag-shaped mat to have a constant area and height with high-strength geotextiles (32), and filled with sand (31) composed of a predetermined particle size that is less affected by freezing in the mat, and the groundwater drainage film (40). Donghae prevention device installed on soft ground supporting gravel road with railroad tracks The method of claim 8   While installing the sand mat 30 in accordance with the gravel road width (W) as a single rail track is characterized in that the installation of the sand mat 30 in the longitudinal direction in the longitudinal direction of the rail track 10 East Sea prevention device installed on soft ground supporting gravel road. The method of claim 8,   Characterized in that the sand mat 30 is installed in the longitudinal direction of the rail track 10 in the longitudinal direction while installing a plurality of sand mat 30 in accordance with the width (W) of gravel road The East Sea prevention device installed on the soft ground supporting the gravel road on which the railway tracks are installed. The method according to claim 8 or 9,   The ground water drainage film 40 is manufactured in the form of a film 41 using a material such as polyethylene, and a predetermined interval of the through-hole 42 having a predetermined size on the film surface so that moisture can easily move on the film 41. Or to form a narrow-sized protrusion (not shown) on both sides of the film 41, or at regular intervals on the film 41, to form a through hole 42 having a constant size. The East Sea prevention device installed on the soft ground which supports the gravel road on which the railway tracks are laid, characterized in that any one of the projections are formed on both sides while forming. The method according to claim 10 or 11, wherein  Both sides or four sides of the laid sand mat 30 is connected to each other using the connector 50 to prevent the movement on the soft ground 14 to support the gravel road in which the railway tracks are laid. Donghae prevention device installed on the soft ground. The method of claim 13,        The connector 50 forms a rectangular frame 51 made of metal or a plastic material having strength, and has a triangular triangular protrusion portion 54 below the vertical portion 43 and the vertical portion 43 downwardly on the corner portion 52. ) Is a freeze preventing device installed on the soft ground supporting the gravel road on which the railroad tracks are placed, characterized in that the insertion portion 55 is installed.

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