JP2013053454A - Packing material for catchment hole of liner plate catchment well - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing material for a catchment hole of a liner plate catchment well, the packing material being used in a drainage structure utilizing a catchment hole installed for gravitational drainage of underground water present on a back face earth side of a liner plate catchment wall, water falling on a back face of the liner plate, and the like in the liner plate catchment well installed as a landslide suppression work mainly in a mountainous area.SOLUTION: An elastic packing material 10 is inserted in a catchment hole 5 provided in each of wave parts 4a, 4b of a liner plate 4 of a liner plate catchment well 1, and the elastic packing material 10 is mounted to whole circumference of a peripheral end of the catchment hole 5 in a water cut-off condition in the state that the packing material 10 is elastically deformed and in close contact with the whole circumference of the peripheral end of the catchment hole 5. The packing material 10 is provided with a groove part 15 which is formed on its outer peripheral surface along the peripheral end 5a of the catchment hole 5 of the liner plate 4 and in which the peripheral end 5a is fitted.

Description

  The present invention relates to liner plate catchment wells installed mainly in mountainous areas as landslide control works, such as ground water existing on the back soil side of the liner plate catchment wells, natural water flowing down the back of the liner plate, etc. It belongs to the technical field of the packing material for the water collecting holes of the liner plate water well used in the drainage structure that uses the water collecting holes provided for the natural drainage of the backside water).

Conventionally, as illustrated in FIG. 1, the liner plate water collection well 1 is installed in a mountainous area where a landslide surface 2 is predicted, for example, with a depth of about 10 m to 30 m and a diameter of about 3.5 m, and collects backwater. And is effective in suppressing landslides.
As shown in FIG. 2, the liner plate water well 1 is constructed by assembling a unit-sized liner plate 4 into a cylindrical shape, and a canopy 3 is installed on the top for safety in preventing fall. ing. In the liner plate 4, the water collection holes 5 intended for natural water collection are arranged in the arrangement illustrated in FIGS. 4A and 4B with a diameter of about φ30 to φ50 mm and a constant pitch and arrangement. About 200 to 600 water collecting holes per unit are provided.
Furthermore, for the purpose of actively collecting and draining the back water, as shown in FIG. 3, a plurality of water collecting borings 6 are constructed in a radial arrangement toward the ground of the outer periphery, In order to drain the drained water naturally, a drainage boring 8 connected to the nearby river 7 will be constructed. Or a pump is installed and pumped up.

As a prior art relating to the above-described water collection well, the following Patent Document 1 discloses a technique relating to a method for increasing the amount of drainage of drainage boring in the water collection well. Patent Document 2 below discloses a technique related to drain boring.
Further, Patent Document 3 discloses a drainage stopper technique for a drainage well that can easily and quickly perform clogging repair work for the drainage holes of the liner plate constituting the drainage well.

JP 2002-4295 A JP 2006-169930 A JP 2009-203777 A

It is already known that the above-mentioned drainage well is effective in suppressing landslides as a result of actively collecting water from the backside water existing in the surrounding backside soil.
In the case of the liner plate water well 1 constructed by assembling the liner plate 4, the back water oozes out from the back soil side through the water collecting holes 5 provided in the liner plate 4 for the purpose of collecting back water. Since the back surface water is collected in the catchment well along the inner surface of the liner plate 4, the component contained in the back surface water and the back surface water causes the inner surface of the liner plate 4 below the position of the water collection hole 5. The phenomenon that foreign matter such as iron adheres with the passage of time or the corrosion of the inner surface of the liner plate progresses is known, and has been cited as a problem solution as a problem.
That is, the back water that oozes from the natural ground side often contains acid and alkali components. Further, the back surface water that has oozed out of the water collecting holes 5 travels down the inner surface of the liner plate 4 to be in a wet state, and comes into contact with the air in the middle. As a result of repeating the phenomenon such as drying when the amount of exudation is small, the anticorrosion treatment (hot dip galvanization, etc.) applied to the inner surface of the exudation area of the back water in the liner plate 4 is eroded, and corrosion (rusting It has been pointed out that the problem is that
Conventionally, as a countermeasure, a drain pipe made of steel or the like is inserted into the water collecting hole 5, and the gap between the hole edge of the water collecting hole 5 and the drain pipe is water-stopped by caulking or welding, so that the water on the back surface becomes liner. Countermeasures that prevent dripping onto the inner surface of the plate 4 and prevent contact with the back surface water have been considered and implemented. However, the water collecting hole 5 provided in the wave portion 4a or 4b of the liner plate 4 has a complicated three-dimensional shape along the shape of the wave portion even if the shape seen from the central portion of the water collecting well 1 is circular. Therefore, in the countermeasures as described above, a large number of labor is required to apply a water stop treatment by caulking material or welding to the entire water collection well provided on the inner peripheral surface of the water collection well as described above, Even if it was an expert, there was a problem that it took a lot of work and prolonged the working time, requiring a long construction period and a large amount of construction cost.
Further, in Patent Document 3, which is a technique for attaching a drain plug to the water collecting hole 5 having a complicated shape provided in the wave portion of the liner plate 4, there is an outer stopper surface or an inner stopper surface as a function of preventing the drain plug from coming off. A configuration according to is disclosed. However, Patent Document 3 originally discloses a technique for attaching a drain plug, and does not disclose a technical idea of extending the pipe on the inner surface of the liner plate so that the back surface water does not contact the inner surface of the liner plate. Absent. Therefore, when the tube on the inner surface of the liner plate is extended, the moment due to its own weight increases, and even when a large load is applied, the outer stopper surface or the inner stopper surface is not sufficient as a means for mounting in a stable state.

  The object of the present invention is to realize a drainage structure that guides the backside water to a position sufficiently away from the center of the water collection well, when inserting the backside water guide pipe into the water collection hole of the liner plate, The fitting part of the water collecting hole and the back water guide pipe that has a complicated three-dimensional shape along the shape is reliably water-stopped and easily water-stopped without the hassle of caulking or welding. It is providing the packing material for the water collection hole of the liner plate water collection well which can implement | achieve.

As means for solving the problems of the background art, the packing material for the water collecting holes of the liner plate water collecting well according to the invention described in claim 1,
The liner plate is constructed by assembling the liner plate into the cylindrical shape of the well of the liner plate, and the entire circumference of the water collecting hole provided so as to be circular when viewed from the center of the well. A packing material that is elastically deformed and attached in a water-stopping manner, has elasticity, and has a hole in the center,
The packing material has a configuration in which an outer peripheral surface portion includes a step portion formed along the peripheral end of the water collecting hole of the liner plate, and a pipe portion protruding from the position of the step portion. And

The packing material for the water collecting holes of the liner plate water collecting well according to the invention described in claim 2 is:
The liner plate is constructed by assembling the liner plate into the cylindrical shape of the well of the liner plate, and the entire circumference of the water collecting hole provided so as to be circular when viewed from the center of the well. A packing material that is elastically deformed and attached in a water-stopping manner, has elasticity, and has a hole in the center,
The packing material includes a step portion formed on the outer peripheral surface portion along the peripheral end of the water collecting hole of the liner plate, and a tube portion protruding from the position of the step portion is formed. It is a structure provided with at least 1 protrusion part adjacent to the hole edge of a water collection hole facing the said step part on the surface.

The packing material for the water collecting holes of the liner plate water collecting well according to the invention described in claim 3 is:
The liner plate is constructed by assembling the liner plate into the cylindrical shape of the well of the liner plate, and the entire circumference of the water collecting hole provided so as to be circular when viewed from the center of the well. A packing material that is elastically deformed and attached in a water-stopping manner, has elasticity, and has a hole in the center,
It is the structure provided with the groove part formed in the outer peripheral surface part of the said packing material so that the peripheral edge of the hole edge of the water collecting hole of the said liner plate might be followed.

The liner plate collecting well packing material 10 according to the present invention has elasticity (or flexibility) such as rubber, silicon, synthetic resin, or the like, which is strong against acid and alkali components contained in the back surface water. Suitable for mass production at low cost with materials. Using the elasticity, the portion that contacts the liner plate 4 can be attached in a water-stopped state simply and surely by simply inserting it into the water collecting hole 5 of the liner plate water collecting well 1. Construction is easy even in cramped work in the drainage well 1, and the efficiency of the installation work is improved.
That is, the step portion 11 formed along the peripheral end 5a of the water collecting hole 5 of the liner plate 4 or at least the outer peripheral surface of the packing material 10 is preferably positioned on the upper surface side so as to face the step portion 11 at least. A groove portion 15 provided with one protrusion 14 or formed in a shape along the peripheral end 5a of the water collecting hole 5 and into which a portion contacting the liner plate 4 is fitted in the water collecting hole 5 in a water-stopping state. Since it is the structure provided, the operation | work which attaches to the water collecting hole 5 of the liner plate 4 in a water stop state can be performed easily, reliably and quickly, without requiring special skill, and a drainage structure can be implement | achieved easily. In addition, work can be performed with uniform quality and workability is good. Therefore, the construction period can be shortened, the construction cost can be reduced, and the construction management can be easily performed.
And once it is attached to the water collecting hole 5 as described above, the combined effect of the effect that the step portion 11 abuts on the liner plate 4 and the operation that the projection 14 abuts on the liner plate, or the fitting state of the groove 15 Thus, the contact effect of elastically contacting the peripheral end 5a of the water collecting hole 5 of the liner plate 4 can maintain a firm and stable attachment state for a long period of time and allow the drainage structure to function effectively for a long period of time.

It is explanatory drawing which showed the example of installation of the liner plate water well. It is the elevation which showed the more specific installation structure of the liner plate catchment well in the half section. It is a top view of the liner plate water well shown in FIG. (A), (B) is the front view which showed the example of arrangement | positioning of the water collecting hole of a liner plate. It is sectional drawing of the principal part which showed the state which attached the packing material to the water collecting hole of the convex wave part of a liner plate. It is the perspective view which showed the peripheral end shape of the water collection hole. It is an expanded sectional view of c circle part indicated to (A). It is the perspective view which showed the packing material. (A) is sectional drawing of the principal part which showed the state which attached the packing material to the water collecting hole of the concave wave part of a liner plate, (B) is an expanded sectional view of b circle part instruct | indicated to (A). It is sectional drawing of the principal part which showed the state which fitted the back surface water induction pipe in the hole of the packing material as Example 2. FIG. 5C is a side view showing a partially cut away packing material that does not have a groove and includes only a step portion corresponding to the inner wall of the groove instead from the same viewpoint as FIG. 5C. FIG. It is the side view which fractured | ruptured and showed the structure installed using the packing material in the reverse direction to the structure shown in FIG. 5C is a side view showing a partially broken packing material that does not have a groove portion and is configured by a combination of a stepped portion and a protrusion instead, from the same viewpoint as FIG. 5C. FIG. It is the side view which fractured | ruptured and showed the structure installed using the packing material in the reverse direction to the structure shown in FIG.

  The packing material for the water collecting holes of the liner plate catchment well according to the present invention is circular when viewed horizontally from the center of the catchment well 1 on the wave portions 4a and 4b of the liner plate 4 constituting the liner plate catchment well 1. A packing material having elasticity and having a hole in the central part, which is attached in a water-stopping state in an elastically deformed and closely contacting manner with respect to the entire circumference of the water collecting hole 5 provided on the outer peripheral surface part In this configuration, the groove portion 15 is formed along the peripheral edge of the hole edge of the water collecting hole 5 of the plate 4.

Next, the present invention will be described based on Example 1 shown in FIGS.
The packing material 10 for the water collecting holes of the liner plate water well according to the first embodiment is circular as viewed in the horizontal direction from the center of the water collecting well 1 in the wave part 4a or 4b in the arrangement as shown in FIG. When the liner plate water well 1 is constructed by assembling the liner plate 4 having the water collecting holes 5 provided so as to be, for example, as illustrated in FIG. 1 or FIG. When inserting a rear water guide pipe 12 as shown in FIG. 7 into the water collecting hole 5, its essential point is elastic as a water stop member between the water collecting hole 5 and the rear water guide pipe 12. It is carried out by being deformed and attached in a water-stopping state in such a manner that it is in close contact with the entire circumference of the peripheral end 5a (see FIG. 5B) of the water collecting hole 5.
Incidentally, in Example 1 shown in FIG. 5, the packing material 10 is brought into contact with the liner plate 4 into the water collecting hole 5 provided in the wave portion 4 a in which the waveform of the liner plate 4 is convex toward the inside of the water collecting well 1. The structure attached so that a part may be in a water stop state is shown.
6A and 6B, which will be described later, the embodiment of the present invention is a case where the packing material 10 is attached to the wave portion 4a that protrudes inward of the water collection well 1. On the contrary, it is roughly divided into the case where the packing material 10 is attached to the wave portion 4b that protrudes outwardly from the drainage well 1, but it should be mentioned in advance that there is no substantial difference in the configuration of each embodiment. .
Further, as means for providing the water collecting holes 5 in the wave portions 4a or 4b of the liner plate 4 so as to be circular when viewed horizontally from the center of the water collecting well 1, press working or laser processing known as a conventional technique is used. Or by applying plasma processing.

The packing material 10 has elasticity (and / or flexibility), and has a hole into which a back surface water guide tube 12 to be described later is inserted at the center, and is a material that is not easily corroded by back surface water, for example, It can be molded using materials such as rubber, silicon, and synthetic resin.
In the case of Example 1 shown in FIGS. 5A to 5D, the liner plate 4 is formed into a steel sheet having a thickness of 2.7 mm by corrugating the three peaks as viewed from the inner surface of the drainage well 1 to form a vertical width dimension of 500 mm. At the same time, after the water collecting holes 5 are provided in the wave portions 4a and 4b, the hot dip galvanizing or the like is applied to the liner plate 4. When the circular aperture of the water collecting hole 5 viewed from the center side of the water collecting well 1 is 50 mm, the packing material 10 is made of rubber having a hardness of 40 to 70 degrees, and the outer diameter is 58 mm and the inner diameter is 48 mm as an example. The outer diameter of the portion to be in close contact with the peripheral end 5a of the water collecting hole 5 is formed to be 52 mm and the wall thickness is 5 mm.
And in the outer peripheral surface portion, as shown in detail in FIGS. 5C and 5D, the peripheral end 5a of the water collecting hole 5 provided in the liner plate 4 (directly indicates the inner peripheral surface of the water collecting hole 5, The groove 15 formed in a three-dimensional shape (see FIG. 5D) along the meaning of the hole edge is attached to the water collecting hole 5 in a water-stopped state. It is provided with the structure as follows.
That is, the depth of the groove portion 15 is about 3 mm in the above dimensional specification, and the thickness of the groove bottom is about 2 mm.
The opening width (maximum groove width) of the groove portion 15 is 13 mm, and the water collecting hole 5 has a complicated three-dimensional shape. A margin for fitting into the water-stopping state is secured.

  If the shape of the groove 15 formed along the peripheral end 5a of the water collecting hole 5 is specifically the case of FIG. 5D, the top surface of the packing material 10 has an arc shape protruding toward the back soil direction, From the top surface to the side surface, the arc gradually protrudes toward the center of the drainage well 1, and from the side surface to the bottom surface, the arc gradually protrudes toward the back soil direction. That is, the groove portion 15 is formed in a bent state in which the groove portion 15 is bent in the back soil direction, then is bent in the central direction of the drainage well 1, and is then repeatedly bent in the back soil direction. It takes the form of returning to the original position after making a round.

Therefore, the packing material 10 is fitted into the hole of the water collecting hole 5 while appropriately compressing and deforming a necessary portion using the elasticity, and finally the groove portion 15 is connected to the entire peripheral end 5 a of the water collecting hole 5. When fitted, they can be both elastically intimate (adherent) to achieve a water-stopping installation without any other treatment. As illustrated in FIGS. 5B and 5D, the groove 15 has a unique three-dimensional shape along the peripheral end 5 a of the water collecting hole 5 formed in the wave portions 4 a and 4 b of the liner plate 4.
Since the configuration is as described above, as can be understood from the examples illustrated in FIG. 5C, FIG. 6B, and FIGS. 8 to 11, the essential parts of the packing material 10 having elasticity are appropriately compressed and deformed. When inserted into the water collecting hole 5, the groove bottom of the groove portion 15 comes into close contact (contact) with the entire circumference of the peripheral end 5 a of the water collecting hole 5 in an elastically deformed state, and a reaction force R based on the elastic deformation is generated. The contact in the water-stopping state is reliably realized in such a manner that it acts outward over the entire circumference of the peripheral end 5 a of the water collecting hole 5.

  Thus, as shown in FIGS. 5A and 5C, the drainage structure of the back water of the liner plate catchment well of Example 1 is shown in FIG. 5 when the packing material 10 is attached to each catchment hole 5 of the liner plate catchment well 1. 7, when the back surface water guide pipe 12 is inserted into the water collection hole 5, water can be reliably stopped between the water collection hole 5 and the back surface water guide pipe 12. Back water is received on the back soil side and discharged to the inside of the water collection well 1 so as not to wet the inner surface of the liner plate 4. Therefore, the water collection well 1 performs well as a landslide control work, and since the back water does not wet the inner surface of the liner plate 4, foreign matters such as iron adhere to the inner surface of the liner plate 4, This greatly contributes to preventing the occurrence of corrosion and maintaining a long service life.

  6 (A) and 6 (B), the configuration is almost the same as in FIGS. 5A to 5D. However, the water collecting hole in which the packing material 10 is provided with the wave portion 4b protruding outward from the water collecting well 1 is used. The structure attached to 5 is shown. That is, similar to the embodiment shown in FIGS. 5A to 5D, the wave portion can be implemented regardless of whether it is inwardly convex or outwardly convex in the drainage well 1.

Next, a state in which the packing material 10 is inserted into the water collecting hole 5 shown in FIG. 7 and then the back surface water guide pipe 12 is inserted into the packing material 10 will be described.
The drainage structure of the backside water of the liner plate collecting well 1 has a backside water guiding pipe 12 having a certain length toward the center of the collecting well 1 in the hole of the packing material 10 attached to the collecting hole 5. It is installed in a water-stopping state so as to be fitted in a penetrating state and in close contact with the packing material 10. The back surface water guide pipe 12 receives back surface water and enters the inner surface of the collecting well 1 to the inner surface of the liner plate 4. It is the structure characterized by discharging | emitting so that it may not get wet.
The back surface water guide pipe 12 is made of a steel pipe or a resin pipe, and is approximately 550 mm in the above-mentioned dimension specification from the position of the groove 15 (substantially the position of the water collecting hole 5) to the inside of the water collecting well 1. It is fitted so that it protrudes to some extent. The length described above is a dimension that takes into consideration that there is no possibility that drained back water will wet the inner surface of the liner plate 4.
On the other hand, on the back soil side of the catchment well 1, it is fitted so as to have a length of about 24 mm from the position of the groove 15 toward the back soil side of the catchment well 1.
However, the said back surface water induction pipe 12 is not limited to the said dimension. For example, the length that does not wet the inner surface of the liner plate 4 by the back water can be easily and freely adjusted according to the size of the liner plate water well 1 and the amount of the back water.

The back surface water guide pipe 12 can be fitted into the hole (inner diameter is about 48 mm) of the packing material 10 attached to the water collecting hole 5 of the water collecting well 1 and is brought into close contact with the packing material 10 to stop water. The outer diameter that can maintain the state is, for example, about 49 mm.
Therefore, the back surface water guide pipe 12 fitted in the hole of the packing material 10 is elastically closely (closely) tightly with the packing material 10 to achieve installation in a water-stop state. Therefore, there is no inconvenience that the back surface water leaks from the gap between the packing material 10 and the back surface water guiding pipe 12, and the coking process that has been conventionally required is not required at all.

In the present embodiment, the back soil side end of the back water guide tube 12 is formed in a plane perpendicular to the tube axis. Therefore, for the purpose of improving the function of collecting and collecting water from the backside water that oozes out from the backside soil, the top surface of the end portion (portion located on the top surface as a mode of use) has a length of about 19 mm from the front end surface to the tube axis direction. It is preferable to form a notch-like slit that extends, or to form an inclined surface having a receiving port whose upper side is short with respect to the tube axis (not shown).
Due to the above shape, the back surface water that exudes from the back soil near the back surface water guide pipe 12 is received through the notch slits of the back water guide pipe 12 and discharged into the drainage well 1. Demonstrate.

Therefore, the packing material 10 for the water collecting hole of the liner plate water well of the first embodiment reliably stops water between the water collecting hole 5 and the back water guiding pipe 12 when the back water guiding pipe 12 is inserted. Since the back water does not wet the inner surface of the liner plate 4, it prevents foreign matters such as iron from adhering to the inner surface of the liner plate 4 and prevents corrosion, thereby providing a long service life. It greatly contributes to maintenance.
Moreover, since the pipe part by the side of the back surface of the back surface water guide pipe 12 strikes the back surface soil of the water collection well 1 and receives the action of fixing and holding by the back surface soil, the same back surface protruding toward the inside of the water collection well 1 There is a function to resist the action of the downward moment caused by the weight of the drainage side pipe portion of the water guide pipe 12 and the weight of the back water flowing in the pipe, and the above-mentioned long-term mounting state of the back water guide pipe 12 is long. Stabilization is obtained.

Next, the second embodiment shown in FIGS. 8 and 9 will be described. The configuration of the packing material 10 according to the second embodiment shown in FIG. 8 is basically the same as that of the first embodiment shown in FIG. 5C.
However, the packing material 10 according to the second embodiment does not have a complete groove portion 15 as in the first embodiment, and has the same configuration as that of one side wall (right side) of the groove portion 15. A feature is that the step portion 11 formed along the peripheral end 5 a of the water collecting hole 5 provided in is provided on the inner surface side of the liner plate 4 on the outer peripheral surface portion of the packing material 10. And the pipe part 13 of the outer diameter smaller than the outer diameter of the step part 11 which protrudes from the position of the said step part 11 toward the back soil side of the catchment well 1 corresponds to the groove bottom of the said groove part 15. It is formed with.
The packing material 10 of Example 2 shown in FIG. 8 is formed with the pipe portion 13 having an outer diameter smaller than the outer diameter of the stepped portion 11 as described above toward the back soil side. The operation of inserting and attaching to the water collecting hole 5 is relatively easy. However, even when the pipe portion 13 is inserted into the water collection hole 5, it is still the same that the pipe portion 13 is inserted into the water collection hole 5 while partially compressing an appropriate place using the elasticity unique to the material.
Thus, the pipe portion 13 inserted into the water collecting hole 5 has the outer diameter of the thin tube portion 13 in close contact with the entire circumference of the peripheral end 5a of the water collecting hole 5 due to the reaction force R of the compression. It is attached to a water-stopping state in a manner of (crimping).

  In addition, as indicated by the two-dot chain line in FIG. 8, as in the configuration described in the first embodiment, a certain length is entered into the hole of the packing material 10 according to the second embodiment toward the central portion of the drainage well 1. The back surface water guide pipe 12 having the above is fitted in a penetrating state, and the back surface water that exudes from the back surface soil is guided to the inside of the water collection well and discharged. The back water guide pipe 12 is stopped by hitting the back soil of the drainage well 1, and the stepped portion 11 of the packing material 10 hits the inner surface of the liner plate 4, so that the back water guide pipe 12 hangs due to its weight action or the like Since it resists the force of lowering, a stable mounting state can be realized.

  The embodiment shown in FIG. 9 shows a configuration in which the packing material 10 is installed in the direction opposite to the configuration shown in FIG. That is, the packing material 10 includes a step portion 11 formed along the peripheral end 5a of the water collecting hole 5 provided in the liner plate 4 on the outer surface side (back soil side) of the liner plate 4 and the packing material 10. The thin tube portion 13 including the inner surface of the stepped portion 11 is provided in the outer peripheral surface portion of the stepped portion 11 so as to protrude from the stepped portion 11 toward the inside of the drainage well 1.

Next, the third embodiment shown in FIGS. 10 and 11 will be described. The packing material 10 according to the third embodiment shown in FIG. 10 has a further devised configuration based on the configuration shown in FIG. 8 of the second embodiment.
That is, the packing material 10 according to the third embodiment shown in FIG. 10 does not have the configuration of the groove portion 15 as in the first embodiment, and is provided on the liner plate 4 in the same manner as one side wall (right side) of the groove portion 15. The step portion 11 formed along the peripheral end 5a of the water collecting hole 5 is provided on the inner surface side of the liner plate 4 on the outer peripheral surface portion of the packing material 10, and corresponds to the groove bottom of the groove portion 15. The configuration in which the thin tube portion 13 is formed so as to protrude from the position of the step portion 11 toward the back soil side of the drainage well 1 is the same as the configuration shown in FIG.
And in the case of the packing material 10 of this Example 3, the above-mentioned step part 11 and the above-mentioned step part 11 are arranged on the upper surface part of the outer peripheral surface of the pipe part 13 projecting from the position of the step part 11 toward the back soil side of the catchment well 1. It is characterized in that it has at least one protrusion 14 that faces the liner plate 4 adjacent to the hole edge of the water collecting hole 5 in a relative manner.

  As described above, since the packing material 10 of the third embodiment shown in FIG. 10 also includes the pipe portion 13, the water collecting holes 5 of the liner plate 4 constituting the water collecting well 1 are compressed and deformed at the main points. It is easy to insert and attach while adding. And the attachment state is attached to a water stop state in such a manner that the outer diameter of the thin-walled tube portion 13 is in close contact (crimping) with the reaction force R of the compression with respect to the entire circumference of the peripheral end 5a of the water collecting hole 5. This is common to the first and second embodiments.

In addition, as indicated by a two-dot chain line in FIG. 10, as in the configuration described in the first embodiment, a certain length toward the center of the drainage well 1 into the hole of the packing material 10 according to the third embodiment. The back surface water guide pipe 12 having the penetrating state is fitted in the penetrating state, and the back surface water that exudes from the back surface soil is guided to the inside of the water collection well and discharged.
In this case, the pipe portion 13 inserted into the water collecting hole 5 is in contact with the edge of the water collecting hole 5 between the protruding portion 14 arranged so as to face the stepped portion 11 and the stepped portion 11. Since the operation of abutting against the liner plate 4 is exerted, it is possible to realize a more stable attachment state than that of the second embodiment by resisting the force that the rear water guide tube 12 is about to hang down due to its weight effect or the like.
Therefore, if at least one protrusion 14 is provided, the above object can be achieved. As a more preferred embodiment, it is effective to provide the protrusion 14 on the upper surface portion as shown in FIG. 10 in the mounting posture of the packing material 10. And it is also preferable to implement by the structure which provides the projection part 14 in multiple numbers on the outer peripheral surface of the pipe part 13, and aims at the further stability of the said attachment state. Since the protrusion 14 is integrally provided on the tube portion 13 of the packing material 10 having elasticity, the protrusion 14 does not cause any difficulty in the operation of attaching the hole of the water collecting hole 5 while being hidden.

  The embodiment shown in FIG. 11 shows a configuration in which the packing material 10 is installed in the direction opposite to the configuration shown in FIG. That is, the packing material 10 includes a step portion 11 formed along the peripheral end 5a of the water collecting hole 5 provided in the liner plate 4 on the outer surface side (back soil side) of the liner plate 4 and the packing material 10. A thin-walled pipe portion 13 including the inner diameter surface of the stepped portion 11 is formed so as to protrude long from the stepped portion 11 toward the inside of the drainage well 1. The structure is provided with at least one projecting portion 14 that is adjacent to the edge of the water collecting hole 5 and abuts against the liner plate 4 on the upper surface portion of the surface so as to face the stepped portion 11.

  Although the present invention has been described based on the illustrated embodiments, the present invention is not limited to the configurations and functions of the embodiments. I would like to remind you that this is a technical idea that includes the scope of application and changes similar to design changes made by those skilled in the art as necessary.

DESCRIPTION OF SYMBOLS 1 Liner plate water well 4 Liner plate 4a, 4b Wave part 5 of a liner plate Water collecting hole 5a Circumference edge 10 of a water collecting hole Packing material 11 Step part 12 Back surface water guide pipe 13 Pipe part 14 Projection part 15 Groove part

Claims (3)

The liner plate is constructed by assembling the liner plate into the cylindrical shape of the well of the liner plate, and the entire circumference of the water collecting hole provided so as to be circular when viewed from the center of the well. A packing material that is elastically deformed and attached in a water-stopping manner, has elasticity, and has a hole in the center,
The packing material has a configuration in which an outer peripheral surface portion includes a step portion formed along the peripheral end of the water collecting hole of the liner plate, and a pipe portion protruding from the position of the step portion. And packing material for water collecting holes of liner plate water collecting wells. The liner plate is constructed by assembling the liner plate into the cylindrical shape of the well of the liner plate, and the entire circumference of the water collecting hole provided so as to be circular when viewed from the center of the well. A packing material that is elastically deformed and attached in a water-stopping manner, has elasticity, and has a hole in the center,
The packing material includes a step portion formed on the outer peripheral surface portion along the peripheral end of the water collecting hole of the liner plate, and a tube portion protruding from the position of the step portion is formed. A packing material for a water collecting hole of a liner plate water collecting well, characterized in that the surface is provided with at least one protrusion adjacent to the edge of the water collecting hole so as to face the stepped part. The liner plate is constructed by assembling the liner plate into the cylindrical shape of the well of the liner plate, and the entire circumference of the water collecting hole provided so as to be circular when viewed from the center of the well. A packing material that is elastically deformed and attached in a water-stopping manner, has elasticity, and has a hole in the center,
For the water collecting hole of the liner plate water well, characterized in that the outer peripheral surface portion of the packing material is provided with a groove formed along the peripheral edge of the hole edge of the water collecting hole of the liner plate. Packing material.

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