JP5929653B2 - Water tap - Google Patents

Description

  The present invention relates to a water faucet that is attached to an opening formed in a steel material, a concrete pile, or a wall body installed on the ground.

Various methods have been developed in the past when constructing a structure on the ground where liquefaction may occur during an earthquake, such as a soft sand layer ground, or when taking measures against liquefaction on an existing structure.
For example, a compaction method (such as a sand compaction pile method) that increases the strength (density) of the ground so that the ground does not liquefy, a ground improvement method using chemical injection, and the like are widely applied.
However, in this method, it is necessary to take measures for the surrounding ground over a considerably wide area, so it is necessary to secure the site, and it is important to improve the structure foundation ground board in order to exhibit the effect reliably. When considering application to an existing structure, it is necessary to remove the structure once and improve the ground, and then install the structure again, or improve the structure base ground from the ground around the structure. However, it is conceivable that the application space is restricted, such as the construction space is limited and low noise and low vibration construction is required. Furthermore, depending on the countermeasure construction method and the range of ground improvement, it may be irrational because a large construction period and cost are required.

As a technique for solving such a problem, an invention described in Patent Document 1 is known.
In the invention described in Patent Document 1, one or more drainage members that form a drainage channel along the longitudinal direction of the sheet pile main body are provided in the sheet pile main body in a predetermined section of the sheet pile main body. A plurality of holes (openings), each having a through hole in the axial direction and having a filter provided in the through hole (water plug), are formed in the drainage member. It is characterized by being provided in.
In such an invention, since the sheet pile to which the member for drainage is attached is driven, the construction time can be shortened, which is effective and economical.

As shown in FIG. 12, the water plug 6 provided in the hole of the drainage member has a plug body 6a having a through hole 6d penetrating in the axial direction and water permeability provided in the through hole 6d. The filter 7 and the filter protective member 8 having water permeability for preventing damage to the filter 7 are provided. Such a water plug 6 is provided in a hole (opening) 5 formed in the drainage member 3 of the steel material 2 such as a sheet pile placed on the ground.
In FIG. 12, the left side of the water passage plug 6 faces the ground side, and the right side faces the inner side (drainage channel) of the drainage member 3.

Japanese Patent Laid-Open No. 04-289315

  By the way, when installing steel materials, such as a sheet pile, to which the drainage member 3 provided with the water plug 6 as described above is fixed on the ground, the soil water pressure is passed through the filter protection member 8 from the ground side to the filter 7. As a result, the filter 7 may swell inside the drainage member 3 and may be peeled off or damaged from the plug body 6a. Similarly, when the ground is liquefied, the filter 7 may be peeled off or damaged from the plug body 6a.

  This invention is made | formed in view of the said situation, and it aims at providing the stopper for water flow which can prevent peeling and damage of a filter.

In order to achieve the above object, the water plug of the present invention is a water plug attached to an opening formed in a steel material, a concrete pile or a wall body installed on the ground,
A plug body having a through-hole penetrating in the axial direction, and a water-permeable filter provided in the through-hole,
A filter protective member having water permeability and a filter reinforcing member having water permeability are provided by sandwiching the filter in the through hole.

  In the present invention, the filter protective member and the filter reinforcing member are provided in the through hole of the plug body with the filter interposed therebetween. Therefore, when placing the steel material, the concrete pile or the wall body on the ground, Even if soil pressure acts on the filter through the filter protection member, the filter reinforcing member can suppress the swelling of the filter. Therefore, it can prevent that a filter swells and peels from a plug main body, or is damaged. Further, when the ground is liquefied, the filter can be prevented from peeling off or being damaged.

In the configuration of the present invention, the plug body and the filter protection member are integrally formed,
It is preferable that the outer periphery of the filter reinforcing member is joined to the inner periphery of the through hole of the plug body.

  According to such a configuration, since the stopper body and the filter protection member are integrally formed, the filter protection member can be formed simultaneously with the stopper body, and then the filter reinforcement is formed on the inner peripheral portion of the through hole of the stopper body. By joining the outer peripheral portions of the members, the filter can be easily sandwiched between the filter protection member and the filter reinforcing member.

Moreover, the said structure of this invention WHEREIN: The said filter protection member may have a some protective member water passage hole, and the said protection member water passage hole may be filled with the water-soluble substance.
Here, the water-soluble substance is a substance that dissolves in water after a predetermined time (for example, within 3 weeks), for example, a water-soluble polymer methylcellulose, a mixture of carboxymethylcellulose with water, a sodium chloride system, or Examples thereof include polyvinyl alcohol-based substances. By using such a water-soluble substance, the above-mentioned effect is exhibited. However, other than that, the water-soluble substance can be used within a predetermined time (that is, after the grounding of the steel material with drainage function 1 until the construction is completed). It is not particularly limited as long as it dissolves in groundwater within a certain period of time (may be within 1 to 6 months in some cases).

  According to such a structure, since the water-soluble substance is filled in the protective member water passage hole of the filter protective member, it is possible to prevent the filter from being damaged and to place the steel material such as a steel material with a drainage function on the ground. At this time, it is possible to avoid sticky soil etc. from adhering to the protective member water passage hole of the filter protective member, and to prevent the fine particles of the ground from solidifying to the protective member water passage hole. It becomes.

Further, in the above configuration of the present invention, the filter reinforcing member has a plurality of reinforcing member water passage holes,
It is preferable that the protective member water hole overlaps at least a part of the reinforcing member water hole in the axial direction of the plug body.

  According to such a configuration, since the water passing through the protective member water passage passes through the filter and passes through the reinforcing member water passage hole without hitting the front wall of the filter reinforcing member, the water permeability is good. It is.

  According to the present invention, since the filter protective member having water permeability and the filter reinforcing member having water permeability are provided by sandwiching the filter in the through hole of the stopper main body, peeling or breakage of the filter can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the stopper for water flow which concerns on the 1st Embodiment of this invention, and shows the state which attached the said stopper for water flow to the member for drainage. (A) is a side view, (b) is a front view, and (c) is a rear view. BRIEF DESCRIPTION OF THE DRAWINGS It is process drawing for demonstrating the manufacturing method of the water flow stopper which concerns on the 1st Embodiment of this invention, (a-1) and (a-2) are the principal parts which show the state which shape | molded the plug main body. Cross-sectional views, (b-1) and (b-2) are cross-sectional views of the main part showing a state in which a filter is attached to the plug body, and (c-1) and (c-2) are filters and filter reinforcements on the plug body. It is sectional drawing of the principal part which shows the state which attached the member. It is a perspective view which shows the steel material with a drainage function which attached the stopper for water flow which concerns on 1st Embodiment. The steel material with a drainage function which attached the tap for water flow which concerns on 1st Embodiment is shown, (a) is a front view, (b) is the sectional view on the AA line in (a), (c) is It is a figure which shows typically the state which installed the steel material with a drainage function in the ground. The water stop plug which concerns on the 2nd Embodiment of this invention is shown, It is sectional drawing which shows the state which attached the said water pass plug to the member for drainage. (A) is a side view, (b) is a front view, and (c) is a rear view. The water stop plug which concerns on the 3rd Embodiment of this invention is shown, It is sectional drawing which shows the state which attached the said water stop plug to the member for drainage. FIG. 7 is a cross-sectional view showing a water passage stopper according to a fourth embodiment of the present invention, in a state where the water passage stopper is attached to a drainage member. FIG. 10 is a cross-sectional view showing a water passage stopper according to a fifth embodiment of the present invention, in a state where the water passage stopper is attached to a drainage member. It is a perspective view which shows the steel sheet pile to which the stopper for water flow which concerns on 1st-5th embodiment was attached. It is sectional drawing which shows an example of the conventional water stopper, and shows the state which attached the said water stopper to the member for drainage.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
1 and 2 show a water passage plug according to the first embodiment. 1 is a cross-sectional view showing a state in which a water passage stopper is attached to a steel material, FIG. 2 shows a water passage stopper, (a) is a side view, (b) is a front view, and (c) is a rear view. .

The water plug 16 is attached to the opening 5 formed in the drainage member 3 of the steel material 2 to be described later installed in the ground, and includes a plug body 6a, plug detachment preventing parts 6b and 6c, a filter. 7. A filter protection member 8 is provided.
The plug body 6a is formed with a through-hole 6d penetrating in the axial direction (left-right direction in FIG. 1), and the filter protection member 8 is provided in the through-hole 6d. The filter protection member 8 is for preventing the filter 7 from being damaged, and has a large number of protection member water passage holes 8a arranged in a mesh shape, thereby having water permeability. In addition, such a protection member water flow hole 8a is a hole formed by the crosspiece 8b arrange | positioned at the grid form vertically and horizontally.

Although the protection member water passage hole 8a is formed in a square shape, the shape of the protection member water passage hole 8a is not limited to a square shape, and may be formed in a circular shape, a polygonal shape, or other shapes. . Moreover, although the magnitude | size and shape of each water flow hole 8a of the filter protection member 8 are equal, it is good also as a different magnitude | size and shape. Further, the filter 7 is provided with a filter protection member 8 because it may be damaged by friction with the ground during construction of the steel material 1 with a drainage function, which will be described later. The size of the protection member water passage hole 8a of the filter protection member 8 is provided. May be set as appropriate in consideration of the size of stones and sand constituting the target ground. For example, in general, the size of the protective member water passage hole 8a is not less than the mesh gap of the filter 7 and can be set to about 0.5 to 50 mm in consideration of ground characteristics. However, when the water-soluble substance SB is filled in the protective member water passage hole 8a, the water-soluble substance SB can also have a function of complementarily protecting the filter 7, so that the size of the protective member water passage hole 8a is increased. The thickness can be set larger than the range of about 0.5 to 50 mm. The material of the filter protection member 8 may be, for example, synthetic resin such as vinyl chloride, polyethylene, nylon, polypropylene, or rubber, and the size and shape of the protection member water passage hole 8a of the filter protection member 8 and the thickness of the crosspiece 8b. The required strength may be ensured by adjusting the thickness.
Such a filter protection member 8 is typically formed integrally with the plug body 6a by resin injection molding.

The filter 7 prevents soil particles passing through the filter protection member 8 from flowing into the drainage member 3 described later, and is formed of a thin warp knitted fabric or nonwoven fabric.
The filter 7 may be a stainless steel filter, or a synthetic fiber or a synthetic resin. When there is a concern about rusting, the latter filter is preferable. For example, a warp knitted fabric such as nylon, polyethylene monofilament, or polyester, or a nonwoven fabric such as polypropylene or polyester fiber can be used. Moreover, it is good also as a filter by combining or superposing synthetic fibers or synthetic fibers and synthetic resins. Moreover, a thin synthetic fiber filter may be provided in a single layer, or this filter may be provided in a double layer.

The mesh or gap of warp knitted fabric, non-woven fabric, or stainless steel filter as the filter 7 is a filter made of earth and sand in consideration of the particle size distribution of the soil (generally sand ground) to be liquefied. It is recommended to set so as not to cause clogging. This mesh or gap is a ground that has a possibility of liquefaction, and the soil particle size is particularly large. In the ground that is relatively evenly distributed, it can be set to be as large as 1 to 3 mm. In the general ground where there is little ground and there is a possibility of liquefaction, it is better to set it as small as about 1 to 3 mm or less. Further, it is generally desirable that the filter 7 is thin in order to prevent clogging.
For this reason, a member for protecting the filter 7 is required for the water passage stopper.

A filter reinforcing member 10 having water permeability is provided in the through hole 6d of the plug body 6a on the side opposite to the filter protection member 8 with the filter 7 interposed therebetween.
The filter reinforcing member 10 prevents the filter 7 from being peeled off or damaged from the plug body 6a when earth water pressure is applied to the filter 7 from the ground side. Although it is formed to be the same as or thinner than the filter protection member 8, it may be formed thicker than the filter protection member 8 when the number of cross members 10 b of the filter reinforcing member 10 is small.

Further, the filter reinforcing member 10 has a large number of reinforcing member water passage holes 10a arranged in a mesh shape, thereby having water permeability. In addition, such a reinforcement member water-passing hole 10a is a hole formed by the crosspiece 10b arrange | positioned at the grid | lattice form vertically and horizontally.
Although the reinforcing member water passage hole 10a is formed in a square shape, the shape of the reinforcing member water passage hole 10a is not limited to a square shape, and may be formed in a circular shape, a polygonal shape, or other shapes. The size, shape, and number of the reinforcing member water holes 10a are equal to the size, shape, and number of the protective member water holes 8a, and the reinforcing member water holes 10a further include the protective member water holes 10a. 8a and the plug body 6a overlap in the axial direction. In other words, the large number of protective member water holes 8a and the large number of reinforcing member water holes 10a are arranged to coincide with each other in the axial view of the plug body 6a.
Even if the protective member water hole 8a and the reinforcing member water hole 10a are not aligned with each other in the axial view of the plug body 6a, the protective member water hole 8a is provided as the reinforcing member water hole. What is necessary is just to have overlapped with at least one part of 10a in the axial direction of the plug main body 6a.

  Such a filter reinforcing member 10 is formed of the same material as that of the filter protection member 8 by injection molding separately from the plug body 6a. The filter reinforcing member 10 formed separately is provided in a state in which the filter 7 is sandwiched between the filter protective member 8 and the through hole 6d of the plug body 6a.

  The above shows a standard case in which the filter protection member 8 is formed integrally with the plug body 6a. However, the present invention is not limited to this, and the filter reinforcing member 10 may be formed integrally with the plug body 6a. . In this case, the filter protection member 8 is formed separately from the plug body 6a, and the filter protection member 8 formed separately is filtered by the filter reinforcing member 8 on the ground side of the through hole 6d of the plug body 6a. 7 is interposed.

Here, a method of attaching the filter 7 and the filter reinforcing member 10 to the plug body 6a in which the filter protection member 8 is integrally formed will be described with reference to FIGS. 3 (a-1) to 3 (c-1).
First, as shown in FIG. 3 (a-1), the filter protection member 8 is formed by injection molding integrally with the plug body 6a.
Further, two step portions 6e and 6f are formed annularly in the circumferential direction of the through hole 6d on the outer peripheral side of the through hole 6d of the plug body 6a.

  Next, as shown in FIG. 3 (b-1), the filter 7 is disposed in the through hole 6d, and the outer peripheral portion of the filter 7 is brought into contact with the stepped portion 6e. It heat-welds to the said level | step-difference part 6e. As a result, the filter 7 is attached to the plug body 6 a in close contact with the filter protection member 8.

Next, as shown in FIG. 3 (c-1), the filter reinforcing member 10 is disposed in the through hole 6 d and the filter reinforcing member 10 is in contact with the outer peripheral portion of the filter reinforcing member 10 in contact with the stepped portion 6 f. The outer peripheral part of the member 10 is thermally welded to the step part 6f. As a result, the outer peripheral portion of the filter reinforcing member 10 is joined to the inner peripheral portion of the through hole 6d.
In this way, by setting the filter 7 between the filter reinforcing member 10 and the filter protection member 8, the reinforcing effect of the filter reinforcing member 10 can be reliably exhibited.
Further, the filter 7 can be reliably positioned by the step portion 6e, and the filter reinforcing member 10 can be reliably positioned by the step portion 6f.
In FIG. 3C-1, there is a slight gap between the filter 7 and the filter reinforcing member 10, but at the time of welding, the stepped portion 6 f is melted and the filter reinforcing member 10 is attached to the filter 7. It is preferable to make it close.

Furthermore, another method for attaching the filter 7 and the filter reinforcing member 10 to the plug body 6a in which the filter protection member 8 is integrally formed will be described with reference to FIGS. 3 (a-2) to (c-2). .
Also in this case, as shown in FIG. 3A-2, the filter protection member 8 is formed integrally with the plug body 6a by injection molding.
Further, the plug body 6a does not have a step portion on the outer peripheral side of the through hole 6d, and a surface 6g for welding the filter 7 and the filter reinforcing member 10 is formed in an annular shape in the circumferential direction of the through hole 6d.

  Next, as shown in FIG. 3B-2, the filter 7 is disposed in the through hole 6d, and the outer peripheral portion of the filter 7 is brought into contact with the annular portion 6g. At this time, it is not always necessary to thermally weld the outer peripheral portion of the filter 7 to the annular portion 6g. Rather, it is desirable to proceed to the next step while keeping the outer peripheral portion of the filter 7 in contact with the annular portion 6g without welding, so that the heat welding step can be omitted.

Next, as shown in FIG. 3C-2, the filter reinforcing member 10 is disposed in the through hole 6d, and the outer periphery of the filter reinforcing member 10 is brought into contact with the annular portion 6g with the filter 7 interposed therebetween. In addition, the outer peripheral portion of the filter reinforcing member 10 is thermally welded to the annular portion 6g together with the outer peripheral portion of the filter 7. Thereby, the outer peripheral part of the filter 7 and the filter reinforcing member 10 is joined to the inner peripheral part of the through hole 6d by one thermal welding.
In this way, by setting the filter 7 between the filter reinforcing member 10 and the filter protection member 8, the reinforcing effect of the filter reinforcing member 10 can be reliably exhibited.
In FIG. 3 (c-2), the filter 7 is disposed in contact with both the filter protection member 8 and the filter reinforcing member 10, so that both of them can be applied regardless of the direction of pressure applied to the filter 7. Reinforced by. Further, the filter 7 and the filter reinforcing member 10 can be rationally processed because their outer periphery is fixed to the plug body 6a by one heat welding.

The plug detachment preventing portions 6b and 6c prevent the detachment of the water plug 16 from the steel material 2 when the steel material 2 to which the water plug 16 is attached is constructed on the ground. As shown in FIG. 1, the stopper detachment preventing portion 6 b has an end portion on the opposite side to the tip end side (the left end portion in FIG. 1) into which the water plug 16 is inserted into the opening 5 formed in the steel material 2. Is formed. The diameter of the stopper detachment preventing portion 6b is larger than the diameter of the opening 5.
Further, as shown in FIG. 2A, the stopper detachment preventing portion 6b is formed in a disc shape integrally with the left end portion of the stopper body 6a. An annular inclined surface 6g that is inclined obliquely is formed on the outer periphery of the disc-shaped stopper removal prevention portion 6b, and this inclined surface 6g and the back surface of the disk-like stopper removal prevention portion 6b are formed. When the angle is θ, θ ≦ 60 ° is set.
Here, θ is set in this way. When θ exceeds 60 °, when the steel material 2 is constructed (placed) on the ground, the plug detachment preventing portion 6b is swollen by the pressure of the earth and sand, so that the steel material 2 It is because it becomes easy to come off. When θ is small, the distal end portion of the outer periphery of the stopper detachment preventing portion 6b becomes thin and easily breaks due to friction with the ground. In this case, the tip may be chamfered to avoid breakage.

The stopper detachment preventing portion 6 c is formed in a disc shape integrally with the right end portion of the stopper main body 6 a, and the diameter thereof is larger than the diameter of the opening 5. Further, for example, four slits 6s are formed in the stopper body 6a at equal intervals in the circumferential direction of the stopper body 6a. The number of slits 6s is not limited to 4 and is set to an appropriate number as long as the stopper detachment preventing portion 6c can be appropriately reduced in diameter by the material, strength, shape, and the like of the stopper body 6a. Further, the slit 6s is formed from the central portion in the axial direction of the plug body 6a to the plug detachment preventing portion 6b. The bottom portion s1 of the slit 6s is formed in an arc shape and is smoothly connected to the opposing side portions s2 and s2.
By forming the slit 6s in this way, the stopper detachment preventing portion 6c can be elastically reduced in diameter, and the diameter of the stopper detachment preventing portion 6c is equal to or smaller than the diameter of the opening 5 in the reduced diameter state. .
Further, since the bottom portion s1 and the side portions s2 and s2 of the slit 6s are smoothly connected, the bottom portion is required when the stopper detachment preventing portion 6c is elastically reduced in diameter and returned to its original state by elastic return. It is possible to prevent a crack or the like from occurring at the end of s1.
Although the example in which the filter protection member 8 is formed integrally with the plug body 6a has been described above, the filter reinforcing member 10 is formed integrally with the plug body 6a, and the filter 7 and the filter protection member 8 are later attached to the plug body. It is also possible to attach the outer periphery to 6a.

  When the water faucet 16 having such a configuration is attached to the opening 5, the stopper detachment preventing portion 6c side is applied to the opening 5, and the stopper detachment preventing portion 6b side is hit or statically pressed with a hammer or the like. Can be easily attached. The diameter of the stopper detachment preventing portion 6c is larger than that of the opening 5. However, when attached, the diameter is elastically reduced to the diameter of the opening 5. When the stopper detachment preventing portion 6c passes through the opening 5, the stopper detachment preventing portion 6c is elastically restored and expanded. When the diameter is reduced and the stopper detachment preventing portion 6c is engaged with the edge of the opening 5, the attachment is completed.

For example, the water plug 16 is attached to a steel material with a drainage function as follows.
4 and 5 show a steel material with a drainage function. FIG. 4 is a perspective view, FIG. 5 (a) is a front view, FIG. 5 (b) is a cross-sectional view taken along line AA in FIG. 5 (c) is a diagram schematically showing a state in which the steel material with a drainage function is installed on the ground.

The steel material 1 with a drainage function is used as a steel sheet pile, and includes a steel material (sheet pile) 2 and a drainage member 3 provided on the steel material 2 in a predetermined section along the longitudinal direction of the steel material 2. Yes. In addition, in Fig.5 (a), the length of the steel material 1 with a drainage function is shown short compared with an actual thing.
The steel material 2 is a U-shaped steel sheet pile, and includes a web 2a, a pair of flanges 2b extending obliquely so as to spread from both side edges of the web 2a, and a joint 2c provided at the tips of the left and right flanges 2b. I have.

The drainage member 3 has a U-shaped cross section formed of channel steel, and its flanges 3b and 3b are fixed to the web 2a of the drainage member 3 by welding. Accordingly, a drainage channel 4 is formed between the drainage member 3 and the steel material 2 along the longitudinal direction of the drainage member 3.
The drainage member 3 is not limited to a U-shaped cross section, and may have a closed cross-sectional shape such as a square or a circle. In this case, at least a part of the drainage member 3 is disposed in a predetermined section of the steel material 2. Should just be attached.
In addition, generally the member 3 for drainage is attached to the width direction center part of the web 2a.

  You may form the corner part 3c in the cross section of the member 3 for drainage in the shape of a curve. That is, as shown in FIG. 5B, the corner 3c may be formed in a substantially arcuate curved shape. The corner 3c is not limited to a substantially arc shape, and may be formed in a curved shape that smoothly connects the web 3a and the flange 3b of the drainage member 3 without a step. The corner portion 3c is not limited to a curved shape, and may be a square shape.

  The web 3a of the drainage member 3 is provided with a large number of openings 5 through which water can flow. The opening 5 has a circular shape, and the water plug 16 shown in FIGS. 1 and 2 is attached to the opening 5.

As shown in FIGS. 4 and 5 (a), a tip member 9 is provided at the lower end of the drainage member 3 in order to prevent intrusion of earth and sand during construction of the steel material with drainage function 1 and to increase penetration. It has been. The tip member 9 includes an inclined plate 9a inclined with respect to the web 3a of the drainage member 3 so as to approach the web 2a of the steel material 2 as it goes downward, and both side edges of the inclined plate 9a and the web 2a. It is provided with a triangular plate 9b provided between and closing the space. In addition,
The inclined plate 9a and the triangular plates 9b on both sides may be integrally formed.

Further, a filter protection plate 12 is attached to the lower end portion of the drainage member 3 in order to avoid damage to the water passage stopper 16, that is, damage to the filter 7 during construction of the steel material with drainage function 1.
As shown in FIGS. 4 and 5A, the filter protection plate 12 has a rectangular plate shape, and the upper surface thereof protrudes from the upper surface of the water passage plug 16 on which the filter 7 is provided. This prevents earth and sand from interfering with the upper surface of the water plug 16 during construction of the steel material 1 with a drainage function, thereby preventing the filter 7 from being damaged.
The width of the filter protection plate 12 is equal to or less than the width of the drainage member 3.
A lid member 11 that closes the upper end opening is attached to the upper end of the drainage member 3 (see FIG. 4).

The drainage member 3 is divided into a plurality of sections in the longitudinal direction. That is, as shown in FIG. 5A, the drainage member 3 is divided into a drainage section K1 that drains water from the drainage channel 4 to the ground, and an inflow section K2 that allows water to flow into the drainage channel 4 from the ground. .
A large number of openings 5 are densely arranged in the drainage section K1, and a large number of openings 5 are sparsely arranged in the inflow section K2.
That is, the opening area of the opening 5 per unit length in the drainage section K1 (per unit length in the longitudinal direction of the drainage member 3) is equal to the unit area in the inflow section K2 (in the longitudinal direction of the drainage member 3). It is larger than the opening area of the opening 5 per unit length). That is, the sum total of the opening areas of the plurality of openings 5 per unit length in the drainage section K1 is larger than the sum of the opening areas of the plurality of openings 5 per unit length in the inflow section K2.
Further, the total opening area of the opening 5 in the drainage section K <b> 1 is equal to or larger than the cross-sectional area of the drainage channel 4.
Therefore, the water flowing into the drainage channel 4 of the drainage member 3 from the ground is sufficiently drained from the drainage section K1 through the drainage channel 4.
In both the drainage section K1 and the inflow section K2, the openings 5 are arranged in parallel in two rows in the longitudinal direction of the drainage member 3 (vertical direction in FIG. 5A) and in the lateral direction. Yes.

The steel material 1 with a drainage function has a structure in which water flowing into the drainage member from the liquefied layer is drained from the upper part of the drainage member due to an increase in excess pore water pressure during an earthquake. At this time, as shown in FIG. 5C, a single-grain crushed stone layer S having good water permeability is often provided around the drainage section K1.
The drainage section K1 needs an opening area enough to drain the water flowing from the underground, and it is necessary to install the single-grain crushed stone layer S so as to cover the section.
At this time, considering the cost of installing crushed stone, it is more economical in terms of material and construction to make the single-grain crushed stone layer S as thin as possible. For this purpose, it is effective to provide an opening having a large area in the drainage section K1 as close as possible to the upper part of the drainage member.
As a structure for improving the opening area, a method of increasing the cross-sectional area of the opening, a method of narrowing the longitudinal pitch of the opening, and a method of providing an opening in the flange 3b in addition to the web 3a of the drainage member 3 Etc. Further, the shape of the opening is not limited, such as a circular shape, an elliptical shape, or a rectangular shape.

As described above, according to the present embodiment, the water plug 16 is attached to the opening 5 formed in the drainage member 3 of the steel material 2, and the plug main body 16 a of the water plug 16 penetrates. Since the filter protective member 8 having water permeability and the filter reinforcing member 10 having water permeability are provided in the hole 6d with the filter 7 interposed therebetween, when the steel material 2 is placed on the ground, the filter protection is performed from the ground side. Even if earth pressure acts on the filter 7 through the member 8, the filter reinforcement member 10 can suppress the swelling of the filter 7. Therefore, it can prevent that the filter 7 swells and peels off from the plug main body 6a or is damaged. Further, when the ground is liquefied, the filter 7 can be prevented from peeling off or being damaged.
Further, since the plug body 6a and the filter protection member 8 are integrally formed, the filter protection member 8 can be formed simultaneously with the plug body 6a, and then the filter is reinforced on the inner peripheral portion of the through hole 6d of the plug body 6a. By joining the outer periphery of the member 10, the filter 7 can be easily sandwiched between the filter protection member 8 and the filter reinforcing member 10.

  Further, the filter reinforcing member 10 has a plurality of reinforcing member water holes 10a, and these reinforcing member water holes 10a overlap with the protective member water holes 8a of the filter protective member 8 in the axial direction of the plug body 6a. Therefore, in the ground, the water passing through the protective member water passage hole 8a passes through the filter 7 and then passes through the reinforcing member water passage hole 10a without hitting the front wall of the filter reinforcing member 10. Is good.

Further, since the opening area of the opening 5 per unit length in the drainage section K1 of the drainage member 3 is larger than the opening area of the opening 5 per unit length in the inflow section K2, an excess gap during an earthquake The water pressure increases and the water flowing from the liquefied layer into the drainage member 3 is sufficiently drained from the drainage section K1 through the drainage channel 4.
Furthermore, since the total opening area of the opening 5 in the drainage section K1 is equal to or larger than the cross-sectional area of the drainage channel 4, the water that flows from the ground into the drainage member 3 and passes through the drainage channel 4 is drainage section K1. It will be fully drained from.
Thus, since the water that flows into the drainage member 3 from the inflow section K2 and passes through the drainage channel 4 can be sufficiently drained from the drainage section K1, the drainage effect can be sufficiently exhibited.

In addition, when the corner 3c in the cross section of the drainage member 3 is formed in a curved shape,
When the water jet hose is pulled out after placing the steel material with drainage function 1 using a water jet, even if the water jet hose contacts the corner 3c, the friction with the corner 3c is greatly reduced. Water jet hose damage can be suppressed.
In addition, since the width of the filter protection plate 12 is narrower than the width of the drainage member 3, when the water jet hose is pulled out, the water jet hose is prevented from coming into contact with the end of the filter protection plate 12, Further damage to the water jet hose can be prevented.

(Second Embodiment)
6 and 7 show a water plug according to the second embodiment. 6 is a cross-sectional view showing a state in which the water passage stopper is attached to the drainage member, FIG. 7 shows the water passage stopper, (a) is a side view, (b) is a front view, and (c) is a rear view. It is.
The water plug 16a shown in FIGS. 6 and 7 is different from the water plug 16 shown in FIGS. 1 and 2 in the configuration of the filter reinforcing member, and the other parts are the same as the water plug 16. Therefore, the same components are denoted by the same reference numerals and the description thereof is omitted.

As shown in FIGS. 6 and 7C, the filter reinforcing member 20 has a large number of reinforcing member water passage holes 20a arranged in a mesh shape, thereby having water permeability. The shape of the reinforcing member water hole 20a is similar to that of the protective member water hole 8a, but its size is larger than that of the protective member water hole 8a. Further, the number of reinforcing member water holes 20a is smaller than that of the protective member water holes 8a.
Furthermore, the protective member water passage hole 8a overlaps a part of the reinforcing member water passage hole 20a in the axial direction of the plug body 6a. In addition, a part of the grid-like crosspiece 8b that forms the protection member water passage hole 8a overlaps with a part of the lattice-like crosspiece 20b that forms the reinforcing member water passage hole 20a in the axial direction of the plug body 6a. The remaining part of the grid-like crosspiece 8b overlaps the reinforcing member water passage 20a and the plug body 6a in the axial direction.
Thus, when the protective member water passage hole 8a overlaps at least a part of the reinforcing member water passage hole 20a in the axial direction of the plug body 6a, the water passing through the protective member water passage hole 8a passes through the filter 7, Furthermore, it passes smoothly through the reinforcing member water hole 20a.

Such a water plug 16a is used by being attached to the opening 5 formed in the drainage member 3 of the steel material 2 in the same manner as in the first embodiment.
In the present embodiment, the same effect as in the first embodiment can be obtained, and since the reinforcing member water passage hole 20a of the filter reinforcing member 20 is large, water permeability is improved and material cost can be reduced. There are advantages.

(Third embodiment)
FIG. 8 shows a water stopper according to the third embodiment, and is a cross-sectional view showing a state where the water stopper is attached to a drainage member.
The water plug 16b shown in this figure is different from the water plug 16 shown in FIGS. 1 and 2 in that a water-soluble substance is filled in the protective member water passage hole 8a of the filter protective member 8, Since other parts are the same as the water plug 16, the same components are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 8, the protective member water passage hole 8a of the filter protective member 8 is filled with a water-soluble substance SB.
The water-soluble substance SB only needs to be a substance that dissolves in water after a predetermined time has elapsed (for example, within 31 weeks). For example, a water-soluble polymer methylcellulose, a mixture of carboxymethylcellulose with water, sodium chloride, or polyvinyl alcohol And the like. By using such a substance, the above-mentioned effect is exhibited, but other than that, it is within a predetermined time as a water-soluble substance (that is, within the time until the construction is completed after the grounding of the steel material with drainage function 1) There are no particular limitations as long as it dissolves in groundwater within 1 to 6 months.
In order to fill the protective member water passage hole 8a with such a water-soluble substance SB, for example, after the plug body 6a is formed by injection molding and the filter 7 is attached, the back surface side of the filter 7 (filter reinforcement) A blocking plate that closes the protective member water passage hole 8a from the back side is disposed on the member 10 side, and then the water soluble substance SB is filled into the protective member water passage hole 8a from the surface side of the filter protective member 8.

Such a water plug 16b is used by being attached to the opening 5 provided in the inflow section K2, and the water plug 16 or the water plug 16a is an opening provided in the drain section K1. It is attached to 5 and used.
That is, the drainage member 3 of the steel material 2 is installed in a liquefied layer, and when liquefied, the pore water in the ground flows into the drainage member 3 to suppress the increase in the pore water pressure in the ground. It is necessary for the interstitial water that has entered 3 to flow out of the drainage member 3 from the top of the drainage member 3. Usually, the upper part of the drainage member 3 is preferably installed above the groundwater surface, and is a section for discharging pore water in the liquefied layer below the groundwater level surface. In the upper part of the drainage member 3, that is, the drainage section K1, infiltration of rainwater or the like can be expected, but there is no groundwater. Therefore, even if a water plug 16b filled with a water-soluble substance is provided in that portion, the water-soluble substance SB remains. It will take time to melt. Therefore, the drainage section K1 that discharges the pore water is attached with the water plug 16 or the water plug 16a not filled with the water-soluble substance, and the inflow section K2 below it is filled with the water-soluble substance SB. By attaching the water passage plug 16b, the filter 7 is not easily clogged when the steel material 2 is placed on the ground, and the pore water can be discharged from the upper drainage section K1 at an early stage. However, from the viewpoint of simplifying the operation of attaching the plug to the drainage member 3, the water plug 16b having the same specification can be attached to all the openings 5 of the drainage member 3. In this case, if the water dissolution rate of the filled water-soluble substance is not extremely slow, the water-soluble substance in the water plug 16b is dissolved in the drainage section K1 by the intrusion of rainwater and the humidity in the air. What is necessary is just to adjust the water dissolution rate of a water-soluble substance suitably in consideration of the installation conditions and environmental conditions of the steel material 2.

  Thus, in the present embodiment, the water-soluble substance SB is filled in the protective member water passage hole 8a of the filter protective member 8 of the water passage stopper 16b attached to the opening 5 provided in the inflow section K2. Therefore, the filter 7 can be prevented from being damaged, and when the steel material 1 with the drainage function is placed on the ground, it is possible to avoid adhesion of viscous soil or the like to the protective member water passage hole 8a of the filter protective member 8. The water permeability as 7 is good.

(Fourth embodiment)
FIG. 9 is a cross-sectional view showing a water passage stopper according to a fourth embodiment, wherein the water passage stopper is attached to a drainage member.
The water plug 16c shown in this figure is different from the water plug 16b shown in FIG. 8 in that, in addition to the protective member water hole 8a of the filter protective member 8, the reinforcing member water hole of the filter reinforcing member 10 is used. 10a is also filled with the water-soluble substance SB, and the other parts are the same as the water plug 16b. Therefore, the same components are denoted by the same reference numerals and the description thereof is omitted.

  In order to fill the protective member water passage hole 8a and the reinforcing member water passage hole 10a with such a water-soluble substance SB, for example, the plug body 6a is formed by injection molding, and then the filter 7 and the filter reinforcing member 10 are attached. After that, a blocking plate for closing the reinforcing member water passage hole 10a from the back side is disposed on the back side of the filter reinforcing member 10, and then the water-soluble substance SB is removed from the front surface side of the filter protective member 8 to the protective member water passage hole 8a. The reinforcing member water passage hole 10a may be filled. The reinforcing member water passage hole 10 a is filled with SB through the protective member water passage hole 8 a through the filter 7.

Such a water plug 16c is used by being attached to at least a part of the opening 5 provided in the inflow section K2. Further, if there is a viscous soil layer at the ground depth corresponding to the inflow section K2, in order to prevent clogging of the filter, the water plug 16b in which the water-soluble substance SB is filled only in the inflow section located deeper than that layer. 16c may be attached.
Therefore, the effect can be obtained as in the third embodiment.

(Fifth embodiment)
FIG. 10 shows a water plug according to the fifth embodiment, and is a cross-sectional view showing a state where the water plug is attached to a drainage member.
The water plug 16d shown in this figure is different from the water plug 16a shown in FIG. 6 in that the reinforcing member water hole 20a of the filter reinforcing member 20, the protective member water hole 8a of the filter protective member 8, and this The water-soluble substance SB is filled in the portion of the through-hole 6d on the front side (left side in FIG. 10) of the protective member water passage hole 8a, and the other parts are the same as the water passage plug 16a. Are denoted by the same reference numerals and description thereof is omitted.

  In order to fill the protective member water passage hole 8a and the through hole 6d with such a water-soluble substance SB, for example, the plug body 6a is molded together with the filter protective member 8, and then the filter 7 and the filter reinforcing member 20 are formed. Is attached to the back side of the filter reinforcing member 20 (the inside of the drainage member 2 (3) is a closing plate for closing the reinforcing member water passage 20a from the back side, and then the surface side of the filter protection member 8 is installed. Therefore, the water-soluble substance SB may be filled into the through hole 6d and the protective member water passage hole 8a.

Such a water plug 16d is used by being attached to at least a part of the opening 5 provided in the inflow section K2.
Therefore, the same effects as those of the third to fifth embodiments can be obtained.

Note that the water plugs 16b, 16c, and 16d may be attached to a part of the opening 5 provided in the inflow section K2, as described above. Moreover, it can also attach to all or one part of the opening part 5 (including the said drainage area K1) of the member 3 for drainage. Even when the drainage member 3 has a risk of foreign matters such as mud adhering during transportation and before placing, the effects can be exhibited by using the water plugs 16b, 16c and 16d.
In the above description, the case where the water passage stopper is circular is shown. However, the shape of the stopper is not limited to a circle. For example, the water passage stopper 16b may be a polygon such as a rectangle or a rectangle. If the structure and product specifications are the same as those of 16c and 16d, the same effect can be obtained. However, in this case, the shape of the opening 5 corresponds to the shape of the water plug so that the water plug can be fitted into the opening 5.

In the present embodiment, the case where the water plugs 16 and 16a to 16d are attached to the opening 5 formed in the drainage member 3 of the steel material 2 has been described as an example, but the water plugs 16 and 16a to 16d. For example, the water plugs 16 and 16a to 16d may be appropriately selected and attached to an opening formed in a steel sheet pile main body 30 placed as a retaining wall as shown in FIG.
Moreover, in this Embodiment, although the case where the water flow plugs 16 and 16a-16d were attached to the opening part 5 formed in the member 3 for drainage of the steel material 2 was demonstrated as an example, the water flow plugs 16 and 16a- The steel material to which 16d is attached is not limited to the U-shaped steel sheet pile of the present embodiment, but is a hat-shaped sheet pile, J pile (steel material for close earth retaining), linear steel sheet pile, Z-shaped steel sheet pile, steel pipe sheet pile, steel pipe pile. , SC pile, H-section steel, or a combination of these steel materials.
Furthermore, the water plugs 16, 16 a to 16 d are not limited to steel materials, and may be attached to openings formed in a wall body constructed of concrete piles, concrete, or other materials.

DESCRIPTION OF SYMBOLS 1 Steel material with drainage function 2 Steel material 3 Drainage member 5 Opening part 7 Filter 8 Filter protection member 8a Protection member water passage hole 10a Reinforcement member water passage hole 10 Filter reinforcement member 16, 16a-16d Water passage stopper 16a Plug body 16d Through Hole

Claims (3)

A water faucet attached to an opening formed in a steel material, a concrete pile or a wall body installed on the ground,
A plug body having a through-hole penetrating in the axial direction, and a water-permeable filter provided in the through-hole,
A filter protective member having water permeability with the filter sandwiched in the through hole, and a filter reinforcing member having water permeability are provided,
The filter protection member has a plurality of protection member water holes,
The filter reinforcing member has a plurality of reinforcing member water holes,
The reinforcing member water passage hole is larger than the protection member water passage hole and has a smaller number of water passage stoppers. In the plug body, a plurality of slits extending from the axial center of the plug body toward the axial end and having a predetermined width in the circumferential direction of the plug body are equally spaced in the circumferential direction of the plug body. Is formed in multiple,
2. The water passage plug according to claim 1 , wherein the bottom portion of the slit is formed in an arc shape having a diameter equal to the width of the slit . Passing cock according to claim 1 or 2, a water-soluble substance prior Kibo protection member through water holes, characterized in that it is filled.