JP2002275876A - Water catching/draining treatment material for underdrainage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water catching/draining treatment material for under drainage, having sufficient strength, good water permeability and superior draining ability. SOLUTION: Each of the hard synthetic resin water catching/draining treatment materials A1-A4 formed by accumulating a number of monofilaments 1 in a random looped shape comprises plurality of cylindrical cavity portions 3, 3a lined in a thick portion 2 of each of the water catching/draining treatment materials A1-A4. A collected water passes through the cylindrical cavity portions 3, 3a, resulting in smooth drainage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an infiltration water in an embankment,
The present invention relates to a drainage treatment material for culvert drainage used for treatment of spring water on the back side of a side wall in a tunnel and drainage on the back side of a concrete retaining wall.

[0002]

2. Description of the Related Art Generally, in civil engineering works, drainage treatment is performed to prevent embankments and retaining walls from being collapsed by rainwater or the like. For example, in the case of a high embankment, a horizontal U-shaped groove orthogonal to the inclination direction is provided at a predetermined height position on the inclined surface,
In the soil, a water collecting and distributing material whose tip faces the U-shaped groove is buried. The collection and drainage treatment material is formed by covering the ballast with a water-permeable sand mat and is formed in a mat shape. When rain falls, the rainwater permeated into the soil is guided into the ballast through the sand mat and the ballast is drained. Through to the U-shaped groove.

[0003]

However, in the case of a large amount of rain or the like, rainwater flows through the internal ballast in the drainage material, but the ballast is complicated by gravel. However, there is much resistance when water flows between them, and the drainage capacity is not sufficient. Therefore, if the drainage capacity is not sufficient, there is a problem that a large amount of surplus water accumulates in the soil, possibly causing landslides and damaging structures such as buildings. Then, this invention was made in order to solve the said subject, and it is strong in intensity | strength and has good water permeability, and an object of this invention is to provide the collection and drainage treatment material for culvert drainage excellent in drainage capacity. .

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a hard synthetic resin collecting and draining material formed by depositing a large number of monofilaments in a random loop. It has a configuration in which a plurality of rows of cylindrical cavities are provided in the thickness portion of the collection and drainage treatment material. As a result, the collected water mainly passes through each of the cylindrical cavities, but there is almost no obstacle to the flow of water in each of the cylindrical cavities, so that drainage can be performed smoothly. Become so.

[0005] More specifically, a vertically long plate-like hard synthetic resin collecting and draining material formed by depositing a large number of monofilaments in a random loop shape, the collecting and draining material has a thickness. The cylindrical hollow portion is formed of a plurality of rows of thick monofilaments, and a coating layer portion formed of a thin monofilament and covering both front and back surfaces of each cylindrical hollow portion. The cross-sectional diameter of the thick monofilament or the thin monofilament is set so as to be adapted to the pressure resistance of the drainage material. In this case, in particular, the thick monofilament forming the cylindrical hollow portion has a substantially circular shape, that is, the central axis of the cylindrical hollow portion is orthogonal to the external pressure, so that the strength is more robust in many substantially circular portions. Structure.

Further, the shape and structure of the drainage material for culvert drainage differ depending on the place where it is used, and it is made of a vertically long plate-shaped hard synthetic resin formed by depositing a large number of monofilaments in a random loop. Wastewater treatment material,
The material for collecting and draining water is composed of a cylindrical hollow portion whose thickness portion is provided in a plurality of rows along the longitudinal direction by monofilaments, and a coating layer portion formed of monofilament and covering one side surface of each cylindrical hollow portion. The configuration is adopted.

[0007] Furthermore, a vertically long plate-shaped hard synthetic resin collection and drainage treatment material formed by depositing a large number of monofilaments in a random loop shape, the collection and drainage treatment material comprises:
A tubular cavity portion, the thickness of which is arranged in a plurality of rows along the longitudinal direction by a monofilament, and which is stacked in multiple stages, and a coating layer portion that covers the front and back side surfaces of the cylindrical cavity portion formed by monofilament and stacked in multiple stages, Is adopted.

[0008] Still further, the present invention relates to a vertically-long cylindrical hard synthetic resin collecting and draining material formed by depositing a large number of monofilaments in a random loop shape, wherein the collecting and draining material has a thickness within its thickness. A configuration including a plurality of tubular cavities arranged in the longitudinal direction by monofilaments and a coating layer portion covering the outer peripheral surface of the plurality of tubular cavities formed by monofilaments is adopted. Since each of the wastewater treatment materials is integrally formed of a hard synthetic resin,
It is easy to handle during transportation and construction.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a drainage treatment material for drainage of a culvert according to the present invention (hereinafter, simply referred to as a drainage treatment material) will be described. 1 and 2 show a wastewater treatment material A1 according to the first embodiment. FIG. 1 is a perspective view of the wastewater treatment material A1, and FIG. 2 is a sectional view of the same. The collection and drainage treatment material A1 is made of a hard synthetic resin, for example, a polypropylene resin, and is formed in a vertically long flat plate shape by depositing a large number of monofilaments 1 in a random loop. Then, a predetermined width (for example, 20 cm) and a predetermined thickness (for example, 3c
m), having a predetermined length (for example, 400 cm), and in this case, a plurality of cylindrical hollow portions 3 along the longitudinal direction in the thickness portion 2.
Are arranged.

Next, a method of forming the drainage / collection treatment material A1 will be described. FIG. 3 shows the manufacturing apparatus.
Is a spinning machine for spinning a molten monofilament. A plurality of large-diameter nozzles 5a having large-diameter nozzle holes and a plurality of small-diameter nozzles 5b having small-diameter nozzle holes
These are provided with small-diameter nozzles 5b on both sides of the large-diameter nozzle 5a, separated from each other by a predetermined distance.
It is provided at a position where it is arranged in a column. A water storage tank 6 filled with water is disposed below the spinning machine 4, and a pair of receiving rolls 7, 7 are disposed therein corresponding to the large-diameter nozzle 5a and the small-diameter nozzle 5b. . Reference numerals 8a and 8b denote transport conveyors provided inside and outside the water storage tank 6, respectively.

Therefore, each large-diameter nozzle 5a of the spinning machine 4
And the large-diameter / small-diameter monofilaments 1a and 1b spun from the respective small-diameter nozzles 5b are dropped into the water storage P below. At this time, the large-diameter and small-diameter monofilaments 1a, 1b dropped into the water storage P are spirally wound so as to have a substantially circular plane shape having substantially the same size as nature. The size of these circular portions is the diameter of the large-diameter nozzle 5a or the small-diameter nozzle 5b, the large-diameter nozzle 5a and the small-diameter nozzle 5b.
Distance from b to water surface, monofilament of large diameter and small diameter 1
It is determined by the temperatures of a and 1b. Then, the cylindrical hollow portion 3 is formed by the large-diameter monofilament 1a, and is passed between the pair of receiving rolls 7, 7 together with the small-diameter monofilament 1b. The interval between the pair of receiving rolls 7, 7 is set to a predetermined thickness, that is, a dimension that does not collapse a substantially circular shape formed by the large-diameter monofilament 1a. Therefore, the small-diameter monofilaments 1b are deposited in a crushed state on both the front and back sides of the plurality of cylindrical cavities 3 arranged in a row in a looped state, and the coating layer 9 is formed. Then, after passing between the pair of receiving rolls 7 and 7, the collected and drained water treatment material A1 according to the first embodiment is discharged to the transport conveyors 8a and 8b and cut at a predetermined size (for example, 400 cm). It is formed.

The cylindrical hollow portion 3 formed by the large-diameter monofilament 1a has almost no obstacles along its longitudinal direction, and the gap formed between the large-diameter monofilaments 1a is relatively wide. On the other hand, the coating layer 9
Since it is formed by the small diameter monofilament 1b, the radius of the substantially circular portion is smaller than that of the large diameter monofilament 1a, and moreover, it overlaps many times along the longitudinal direction, so that the gap formed between the small diameter monofilaments 1b Is relatively narrow. The inside of the thickness portion 2 has a structure that is excellent in water permeability and can easily flow water. In this case, in particular, the thick monofilament 1a forming the cylindrical hollow portion 3 has a substantially circular shape, that is, the central axis of the cylindrical hollow portion 3 is perpendicular to the external pressure. It becomes a structurally robust configuration. In the first embodiment,
Although the collection and drainage treatment material A1 is formed in a vertically long shape, the collection and drainage treatment material A1 may be formed to be a wide rectangle or a square, and further, the cylindrical hollow portion 3 may be formed in a direction orthogonal to the longitudinal direction.

FIGS. 4 and 5 show a wastewater treatment material A2 according to a second embodiment, in which a hard synthetic resin, for example, a polypropylene resin is used as in the first embodiment. A large number of monofilaments 1 are deposited in a random circular shape by a method similar to that of the embodiment to form a vertically long flat plate. The collection and drainage treatment material A2 has a predetermined width (for example, 20 cm), a predetermined thickness (for example, 1 cm),
It has a predetermined length (for example, 400 cm), and in this case, a plurality of cylindrical cavities smaller than the cylindrical cavity 3 of the first embodiment by a monofilament 1a having a large diameter along the longitudinal direction in the thickness 2. The parts 3a are arranged in a line. The coating layer 9 made of the monofilament 1b having a small diameter covers only one side surface of each of the cylindrical hollow portions 3a provided in a plurality of rows.
The collected water is mainly passed through each of the cylindrical hollow portions 3a. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIGS. 6 and 7 show a wastewater treatment material A3 according to the third embodiment. The wastewater treatment material A3 is also made of a hard synthetic resin, for example, a polypropylene resin, similarly to the above. A large number of monofilaments 1 are deposited in a random substantially circular shape by the same method as in the embodiment, and formed into a vertically long flat plate shape. The collection and drainage treatment material A3 has a predetermined width (for example, 20 cm) and a predetermined thickness (for example, 5 c
m), and has a predetermined length (for example, 400 cm). In this case, a plurality of cylindrical hollow portions 3 are arranged in a row in the thickness portion 2 by a monofilament 1a having a large diameter along the longitudinal direction thereof. Are stacked. In this case, the steps of the plurality of cylindrical hollow portions 3 are provided at different positions, and may be three or four steps as necessary. The coating layer 9 made of the small-diameter monofilament 1b is provided so as to cover both the front and back surfaces of the cylindrical cavity 3 that is stacked in two stages. Then, the collected water is mainly passed through each of the cylindrical hollow portions 3. In this case, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIG. 8 shows a wastewater treatment material A4 according to a fourth embodiment, wherein a hard synthetic resin, for example, a polypropylene resin is used for the wastewater treatment material A4 as described above.
The monofilaments 1 are formed by depositing a large number of monofilaments 1 in a random substantially circular shape by the same method as in the first embodiment. However, in this case, the collection and drainage treatment material A4 is formed in a cylindrical shape in which the thickness portion 2 has a donut shape. Therefore, a plurality of cylindrical hollow portions 3 are arranged in the thickness portion 2 in a circular contour along the longitudinal direction by a monofilament 1a having a large diameter. The coating layer 9 made of the thin monofilament 1b is formed so as to cover the outer peripheral surface thereof. Then, the collected water is mainly passed through each of the cylindrical hollow portions 3 or the central hollow portion B. In this case, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The wastewater treatment materials A1 to A4 according to the present invention have the above-mentioned structure. Among them, the wastewater treatment material A1 according to the first embodiment will be described first. This shows the case where it is used to drain the seepage water in the embankment. FIG. 9 is a cross-sectional view of a land M embanked at a landfill site, and FIG. 10 is a front view of the same. In the land M, one side surface of the embankment is an inclined surface S, and U-shaped grooves H that are orthogonal to the inclined direction, that is, horizontal U-shaped grooves H are provided at predetermined height positions. Then, in the soil N, the water collecting and distributing treatment according to the first embodiment is carried out at regular intervals as shown in FIG. The material A1 is buried. At this time, the gap between the drainage treatment material A1 and the gap is 0.6 mm.
To be covered with the mesh filter 10.

Therefore, even when a large amount of rain falls, FIG.
As shown in (1), the rainwater infiltrated into the soil N is collected through the mesh filter 10 into the thickness portion 2 of the drainage material A1, and flows into the U-shaped groove H. At this time, since the cylindrical hollow portion 3 is provided in the thickness portion 2 of the collection and drainage treatment material A1 along the flow direction, rainwater mainly flows through the cylindrical hollow portion 3, The resistance to running water is reduced, and drainage can be performed smoothly. When groundwater springs up, the groundwater flows through the inside of the cylindrical cavity 3 in the same manner as described above. As a result, sufficient drainage capacity is ensured, so that excess water does not accumulate in the soil, and there is almost no danger of landslides. In addition, since the drainage treatment material A1 is formed from a hard synthetic resin, it has high elasticity and strength and is excellent in durability, and the intended purpose cannot be achieved because the cylindrical hollow portion 3 is crushed. Not even. In addition, sand and pebbles rarely enter the thick portion 2 due to the mesh filter 10,
There is no clogging in the thickness portion 2.

Next, a method of using the drainage material A2 according to the second embodiment will be described with reference to FIGS.
This shows the case where it is used to drain the spring water behind the side wall in the tunnel. FIG. 12 is a rear perspective view of a spring water treatment sheet material using the collection and drainage treatment material A2, and FIG. 13 is a sectional plan view of the same. The spring treatment sheet material 11 is made of a polypropylene resin or a polyethylene resin and is impermeable to water, so that the coating layer 9 is not in contact with one surface side of the sheet body 12 formed in a belt shape (usually 10 to 12 m). The drainage material A2 is arranged and fixed such that the coating layer portion 9 faces inward. Then, a strip 13 of the same material as the sheet body 12 is straddled on both side edges of the sheet drainage material A2 and the sheet body 12 along both side edges along the longitudinal direction of the drainage material A2. Place and hot melt adhere to each other. Thereby, both ends are adhered to the sheet main body 12 along the longitudinal direction, and the drainage / collection treatment material A2 is attached. In this case, the cylindrical hollow portion 3a is formed along the longitudinal direction of the spring treatment sheet material 11. The seat body 1
2) When premised on spring water, non-permeable material is selected,
When spring water is not assumed, a water-permeable material such as a nonwoven fabric may be selected.

The reason why the polypropylene resin is used for the sheet body 12 is that the polypropylene resin is stable to alkaline and concrete and mortar for a long time, has no polarity, and does not adhere free lime. Further, the spring water treatment sheet material 11 is attached with a predetermined length added thereto, and in some cases, may be formed into a special desired size or a desired curved shape.

The both sides 1 of the sheet body 12
The holding cylinder portion 16 is provided along the longitudinal direction by folding the 2a and 12a to one side with a predetermined width and joining the folded front edge to the sheet body 12 integrally. Then, a mounting belt 17 made of a soft elastic material is inserted into each holding tube portion 16. The mounting belt 17
Is fixed to the holding cylinder 16 by the stapler 18. The mounting belt 17 has substantially the same length as the seat body 12,
A soft nail material, for example, a synthetic resin material or rubber or a synthetic rubber material, into which concrete nails to be described later can be driven and which is strongly pressed against the surface of the primary lining concrete wall W1, is not easily broken, and is not easily broken. Anything can be used as long as it can be expanded.

Next, a method of using the spring water treatment sheet material 11 will be described. FIG. 14 is a perspective view showing a state where the spring treatment sheet material 11 is mounted on the inner wall surface of the tunnel. After the primary lining concrete W1 is sprayed on the inner wall surface, a number of lock bolts 19 are driven into the primary lining concrete wall W1 in multiple layers along the circumferential direction, and the primary lining concrete W1 is formed. A rectangular square plate 20 is fitted to the base end 19a of the lock bolt 19 protruding from the wall W1, and a nut 21 is screwed into the square plate. Then, the nut 21 is screwed to press the square plate 20 against the surface of the primary lining concrete wall W1.

Next, as shown in FIG. 15, the spring treatment sheet material 11 is made to correspond to each of the lock bolts 19 that are laid multiple times along the circumferential direction of the tunnel, and covers the base end 19a thereof. , And a plurality of concrete nails 23 are sequentially driven into the temporarily lining concrete wall surface W1 via the mounting belt 17 on one side. As described above, the mounting belt 17 is provided in advance, and it is only necessary to sequentially drive the concrete nails 23 along the mounting belt 17, so that the operation is simple. In addition, since the mounting belt 17 is inserted into the holding tubular portion 16, it can be conveniently handled integrally with the seat body 12. Furthermore, even if the concrete nail 23 is driven, it does not rebound and the driving is easy and safe.

Further, both sides of the seat body 12 are attached to the mounting belt 1.
7, the sheet body 12 is prevented from loosening on both sides, and the reliability of construction is improved. Also, if the length is usually the inner circumferential surface of the tunnel and is set to, for example, 10 or 12 m as half of the circumferential length, the spring water treatment sheet material 11 is attached by being distributed to both sides from the central top end,
Attachment work becomes possible by one person. Thus, FIG.
As shown in FIG. 5, the spring treatment sheet material 11 is attached to the primary lining concrete wall surface W1. Note that a white transverse tape 24 (referred to as a measuring line) and a number 25 are attached and displayed on the attached spring water treatment sheet material 11 at an interval of 100 cm. This is to make it easy to see at a glance how long the spring water treatment sheet material 11 has been used in the construction.

Thus, the collection / drainage passage T is formed by the collection / drainage treatment material A interposed between the primary lining concrete wall surface W1 and the sheet body 12. As a result, as shown by the chain line in FIG. 15, after the secondary lining concrete W2 is sprayed on the entire surface of the primary lining concrete wall W1 via the waterproof sheet E and then spring water comes out from the rock bolt 19 portion, Water is drained through the drain passage T. In addition, at this time, since the cylindrical hollow portion 3a is provided in the thickness portion 2 of the collection and drainage treatment material A2, the collected spring water mainly flows through the cylindrical hollow portion 3a. , Drainage is performed smoothly. This ensures a sufficient drainage capacity, and does not impair the drainage function even if a large amount of spring water is generated. Further, the collection and drainage treatment material A2 also serves to prevent breakage of the sheet body 1 and the water stop sheet E by its elastic action.

In the second embodiment, the seat body 1
2 shows a configuration in which the attachment belts 17 are integrally provided on both sides, but this is a case where the spring water treatment sheet material 11 is attached in the vertical direction. It is formed in a tubular shape, and the collection and drainage treatment material A2 is arranged and fixed inside thereof along the longitudinal direction, and the attachment belt 17 is provided only on one side (upper side) of the tubular sheet body 12. May be.

Although not shown in the figure, the drainage treatment material A3 according to the third embodiment is used for treating the seepage water in the embankment or the spring water on the back surface of the side wall in the tunnel, especially the spring water treatment sheet material 11. In order to discharge the spring water collected by the above to the outside of the tunnel, the spring water is attached to a spring treatment sheet material provided so as to communicate with the lower end of each spring treatment sheet material 11 and used. In addition, the drainage / collecting material A according to the fourth embodiment.
Numeral 4 is buried, for example, in a state where a mesh filter is wound around in the soil of a construction site, and is used for draining spring water in the soil.

In the present invention, the first to fourth wastewater treatment materials A1 to A4 have been described for the treatment of infiltration water in the embankment, spring water on the backside of the side wall in the tunnel, and spring water in the lands. Each of them is also attached to the drainage of the backside of the concrete retaining wall, the drainage of the soil of the planted vegetation soil, and the like, and is appropriately selected and used depending on the drainage at the installation location and the amount of spring water.

[0028]

As described above, the wastewater treatment material according to the present invention is a hard synthetic resin material wastewater treatment material formed by depositing a large number of monofilaments in a random loop. Since a plurality of rows of cylindrical cavities are provided in the thickness portion of the drainage treatment material, collected water mainly passes through each of the cylindrical cavities, whereby drainage can be performed smoothly, and sufficient There is an effect that drainage capacity is secured. For example, there is no risk of landslides at the embankment of the land, and there is no accident that the spring water on the back of the side wall in the tunnel overflows and the secondary lining concrete peels off.

[Brief description of the drawings]

FIG. 1 is a perspective view of a drainage treatment material A1 according to a first embodiment.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is a schematic diagram of the manufacturing apparatus.

FIG. 4 is a perspective view of a drainage collection material A2 according to a second embodiment.

FIG. 5 is a transverse sectional view of the same.

FIG. 6 is a perspective view of a drainage treatment material A3 according to a third embodiment.

FIG. 7 is a transverse sectional view of the same.

FIG. 8 is a cross-sectional view of a drainage treatment material A4 according to a fourth embodiment.

FIG. 9 is a cross-sectional view of the embankment of the development site.

FIG. 10 is a front view of the same.

FIG. 11 is a cross-sectional view of the drainage treatment material A1 in the soil.

FIG. 12 is a rear perspective view of the spring treatment sheet material.

FIG. 13 is a sectional plan view of the same.

FIG. 14 is a perspective view showing a state in which a spring treatment sheet material is mounted on the inner wall surface of the tunnel.

FIG. 15 is a cross-sectional view showing a state in which a spring treatment sheet material is attached to the inner wall surface of the tunnel.

FIG. 16 is a perspective view showing a state in which a spring treatment sheet material is mounted on the inner wall surface of the tunnel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Monofilament 1a Large diameter monofilament 1b Small diameter monofilament 2 Thickness part 3, 3a Cylindrical hollow part 9 Coating layer part A1-A4 Collection and drainage treatment material

Claims (5)

[Claims] 1. A hard synthetic resin collecting and draining material formed by depositing a large number of monofilaments in a random loop, wherein a plurality of rows of cylindrical hollow portions are formed in a thickness portion of the collecting and draining material. A drainage treatment material for culvert drainage, characterized in that drainage can be carried out smoothly by installing and passing collected water mainly through each cylindrical cavity. 2. A vertically elongated plate-shaped hard synthetic resin collecting and draining material formed by depositing a large number of monofilaments in a random loop, wherein the collecting and draining material has a monofilament thickness. A plurality of rows of cylindrical cavities along the longitudinal direction, and a coating layer formed of a monofilament and covering both front and back surfaces of each cylindrical cavities. A drainage treatment material for culvert drainage, characterized in that drainage can be carried out smoothly by passing through the cavity. 3. A vertically elongated plate-like hard synthetic resin collection / drainage treatment material formed by depositing a large number of monofilaments in a random loop shape, wherein the collection / drainage treatment material has a monofilament thickness. A plurality of cylindrical cavities along the longitudinal direction, and a covering layer formed of monofilament and covering one side surface of each cylindrical cavity, and each cylindrical cavity mainly collecting water. A drainage treatment material for culvert drainage, characterized in that drainage can be carried out smoothly by passing through the inside of the department. 4. A vertically elongated plate-shaped hard synthetic resin collecting and draining material formed by depositing a large number of monofilaments in a random loop, wherein the collecting and draining material has a monofilament thickness. A plurality of rows along the longitudinal direction and a cylindrical cavity portion in which these are stacked in multiple stages, and a coating layer portion that is formed by monofilaments and covers both front and back surfaces of the cylindrical hollow portion that is stacked in multiple stages. A drainage treatment material for culvert drainage, characterized in that drainage can be performed smoothly by mainly passing the water to be passed through each cylindrical cavity. 5. A vertically elongated cylindrical hard synthetic resin collecting and draining material formed by depositing a large number of monofilaments in a random loop, wherein the collecting and draining material has a monofilament in its thickness. A plurality of cylindrical cavities arranged along the longitudinal direction, and a coating layer formed of monofilaments and covering the outer peripheral surface of the plurality of cylindrical cavities, and mainly water collected A drainage treatment material for culvert drainage, characterized in that drainage can be performed smoothly by passing through each cylindrical cavity.