JP5965243B2 - Water stop structure for sheet pile joint and water stop method for sheet pile joint - Google Patents

Description

  The present invention relates to a water stop structure for a sheet pile joint portion and a water stop method for a sheet pile joint portion.

Conventionally, when constructing a retaining wall or the like by connecting steel sheet piles having a pair of joints, the joints of adjacent steel sheet piles are fitted together. As shown in FIG. 10, there is a gap in the joint portion 100 in which the joints are fitted together. Such a gap in the joint portion 100 makes it possible to smoothly fit the joint, but sufficient water stop performance cannot be obtained unless a process for filling the gap is performed.
As a general water-stopping treatment so far, a paint containing a water-absorbing resin is applied to the joint before the steel sheet pile is cast, and the resin that has absorbed the surrounding water is expanded after the casting, There are a method of increasing the water stop by filling the gap with resin, and a method of injecting a water stop material such as grout into the gap of the joint after the steel sheet pile is placed.

  In addition, there is a known water-stop sheet pile that can form a space for injecting grout at the joint where the sheet-pile joints are fitted together, and the water stoppage is improved by injecting grout into the space. The technique to make is disclosed (for example, refer patent document 1).

JP-A-1-280122

  However, in the case of the above prior art, if a paint containing a water-absorbing resin is applied to the joint in advance, the resin coating film may be damaged or dropped when the steel sheet pile is placed, and the gap in the joint is expanded. In some cases, it was not possible to sufficiently fill the resin. Further, since the gap between the joint portions is not a closed space, leakage may occur even when the water-stopping material is injected, and the gap between the joint portions may not be filled with the water-stopping material.

  Moreover, in the case of the said patent document 1, since it inject | pours from the opening of a sheet pile upper end side when inject | pouring grout into the grout injection | pouring space formed in the joint part, there is concern that the grout cannot be filled to the lower end of a sheet pile. Is done. Moreover, since the resistance at the time of driving a sheet pile increases because the shape of a sheet pile (joint) enlarges in order to form grout injection space, there exists a concern about deterioration of construction efficiency.

  The objective of this invention is providing the water stop structure of the sheet pile joint part which can perform the water stop between sheet piles reliably, and the water stop method of a sheet pile joint part.

In order to solve the above problems, the invention described in claim 1
It is a water stop structure of a sheet pile joint part in which a joint of one steel sheet pile and a joint of another steel sheet pile are fitted together,
The steel sheet pile has a pair of joints on both sides of the sheet pile main body, and each of the joints has a hook-like portion bent toward the sheet pile main body,
In the sheet pile joint part, the hook part of the joint of the other steel sheet pile inserted between the hook part of the joint of the one steel sheet pile and the sheet pile body is directed to the hook part of the joint of the one steel sheet pile. A pressing member that abuts the flanged portion of the joint of another steel sheet pile against the flanged portion of the joint of one steel sheet pile and the sheet pile main body,
A water-stopping material filled in a space formed by bringing the flange-shaped portion of the joint of another steel sheet pile into contact with the flange-shaped portion of the joint of one steel sheet pile and the sheet pile main body is provided. .

Invention of Claim 2 is the water stop structure of the sheet pile joint part of Claim 1,
The joint of the one steel sheet pile is provided with an inlet leading to the space,
The water stop material is injected from the injection port.

Invention of Claim 3 is the water stop structure of the sheet pile joint part of Claim 1 or 2,
In the pressing member, a through-hole that connects the outside of the sheet pile joint portion and the space is formed,
The water blocking material is injected from the through hole.

Invention of Claim 4 in the water stop structure of the sheet pile joint part as described in any one of Claims 1-3,
A plurality of the pressing members are provided along the longitudinal direction of the steel sheet pile.

The invention described in claim 5
It is a water stop method of a sheet pile joint part in which a joint of one steel sheet pile and a joint of another steel sheet pile are fitted together,
The steel sheet pile has a pair of joints on both sides of the sheet pile main body, and each of the joints has a hook-like portion bent toward the sheet pile main body,
In the sheet pile joint portion, press the flange portion of the joint of the other steel sheet pile inserted between the flange portion of the joint of the steel sheet pile and the sheet pile body toward the flange portion of the joint of the one steel sheet pile. Then, a water stop material is filled in a space formed by bringing the flanged portion of the joint of another steel sheet pile into contact with the flanged portion of the joint of one steel sheet pile and the sheet pile main body.

Invention of Claim 6 is the water stop method of the sheet pile joint part of Claim 5,
The water-stopping material is injected from an inlet formed in a joint of one steel sheet pile so as to communicate with the space.

Invention of Claim 7 is the water stop method of the sheet pile joint part of Claim 5 or 6,
Using a pressing member that presses the hook-like portion of the joint of the other steel sheet pile toward the hook-like portion of the joint of the one steel sheet pile, the hook-like portion of the joint of the other steel sheet pile is used as one steel sheet pile. Abutting against the flange of the joint and the sheet pile body,
The water blocking material is injected into the space from a through-hole provided in the pressing member.

Invention of Claim 8 is the water stop method of the sheet pile joint part as described in any one of Claims 5-7,
The water blocking material is injected after the inside of the space is cleaned.

  According to this invention, the sheet pile joint part which can perform the water stop between sheet piles reliably is obtained.

It is a top view which shows the end surface of a steel sheet pile. It is a perspective view which shows the sheet pile joint part which connected the steel sheet pile. It is sectional drawing in the III-III line | wire of FIG. 2, and has shown the bolt part. It is sectional drawing in the IV-IV line of FIG. 2, and has shown the inlet (nozzle) part. It is a water stop structure of a sheet pile joint part, and is a sectional view showing the state where a water stop material was filled into the sealed space. It is explanatory drawing which shows the modification of a volt | bolt. It is a modification of the water stop structure of a sheet pile joint part, and is sectional drawing which shows a bolt part. It is a modification of the water stop structure of a sheet pile joint part, and is sectional drawing which shows an injection port (nozzle) part. It is a modification of the water stop structure of a sheet pile joint part, and is sectional drawing which shows the state which filled the water stop material in sealed space. It is sectional drawing which shows the conventional joint part.

  Hereinafter, embodiments of a water stop structure and a water stop method for a sheet pile joint according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the steel sheet pile 10 is, for example, a hat-type steel sheet pile having a pair of joints, and the first joint 1 and the second joint 2 are respectively provided on both sides of the sheet pile body 3. Yes.
The first joint 1 has a hook-like part 1a bent at the tip side toward the sheet pile main body 3, and the second joint 2 is a hook-like part 2a bent at the tip side toward the sheet pile main body 3. have. Further, a protrusion 3 a is provided in the vicinity of the first joint 1 in the sheet pile main body 3.
And it fits so that the hook-shaped part 2a of the 2nd joint 2 may be inserted in the insertion groove between the hook-shaped part 1a of the 1st joint 1, and the sheet pile main body 3 (projection part 3a), or 2nd The steel sheet piles 10 are connected to each other by fitting the hook-like portion 1a of the first joint 1 into the fitting groove between the hook-like portion 2a of the joint 2 and the sheet pile main body 3. ing.
Thus, the portion where the adjacent steel sheet piles 10 are connected, and the portion where the first joint 1 and the second joint 2 are fitted together becomes the sheet pile joint portion 12 (see FIG. 2).
The hook-shaped portion is a portion formed relatively thick in the joint, and the bent portion of the joint corresponding to the root of the hook-shaped portion is a portion formed relatively thin in the joint. . Moreover, the width of the opening part is narrower than the width | variety of the back | inner side of a groove | channel between the fitting-shaped part and the sheet pile main body of a coupling.

As shown in FIGS. 2 and 3, the sheet pile joint portion 12 has a flange 2 of the other steel sheet pile 10 inserted between the flange-shaped portion 1 a of the joint 1 of the steel sheet pile 10 and the sheet pile body 3. A bolt 20 as a pressing member that presses the shaped portion 2 a toward the flange-like portion 1 a of the joint 1 of one steel sheet pile 10 is screwed into the first joint 1.
The bolt 20 presses the hook-like portion 2a of the second joint 2, and the hook-like portion 2a of the second joint 2 is turned into the hook-like portion 1a of the first joint 1 and the sheet pile body 3 (projection portion 3a). By bringing them into contact with each other, the sealed space R can be formed between the inner surface of the first joint 1 and the bowl-shaped portion 2a.
Here, the shape of the fitting groove between the flange 1a of the first joint 1 and the sheet pile main body 3 (projection 3a) is inserted into the flange 2a of the second joint 2 from the back side of the groove. Since the insertion port is narrow, the hook-shaped portion 2a of the second joint 2 inserted into the insertion groove is pressed with the bolt 20 toward the flange-shaped portion 1a of the first joint 1 on the insertion port side. Thus, the hook-like portion 2a of the second joint 2 can be brought into contact with the hook-like portion 1a of the first joint 1 and the sheet pile main body 3, and the first joint 1 and the hook-like portion 2a are hermetically sealed. The space R can be formed.
Note that a plurality of bolts 20 are preferably provided along the longitudinal direction of the steel sheet pile 10.

  Furthermore, as shown in FIG. 2 and FIG. 4, the bolt 20 is connected to the flange 2 a of the second joint 2 on the joint 1 of one steel sheet pile 10 in the sheet pile joint 12. There is provided an inlet 1b that leads to a sealed space R formed by pressing toward the portion 1a. A water stop material or the like can be injected into the sealed space R between the first joint 1 and the second joint 2 by attaching a nozzle 30 to the inlet 1b.

And as shown in FIG. 5, the predetermined water stop material 5 is inject | poured through the through-hole 30a of the nozzle 30 attached to the inlet 1b of the joint 1 of the steel sheet pile 10, and the 1st joint 1 and the 2nd joint The water stop material 5 can be filled so as to fill the sealed space R between the two.
As the water stop material 5, various polymer resin materials, grout, and the like, which are curable materials that have initial fluidity and solidify after a predetermined time, can be used.
The position and number of the inlet 1b are arbitrary, and the position and number of the inlet 1b are appropriately adjusted according to the length of the steel sheet pile 10 and the fluidity of the water-stopping material 5 to be injected to stop the sealed space R. What is necessary is just to make it fill with the water material 5.
Thus, since the water stop material 5 filled in the sealed space R between the first joint 1 and the second joint 2 is solidified, a slight gap between the first joint 1 and the second joint 2 is also generated. Since it is buried, it is possible to reliably stop water between the joints.
In addition, before injecting the water-stopping material 5, the water-stopping material 5 may be injected after cleaning the inside of the sealed space R by injecting high-pressure water into the sealed space R through the through-hole 30 a of the nozzle 30. preferable. If the water-stopping material 5 is injected after cleaning the inside of the sealed space R to remove foreign matters, the water-stopping material 5 can be easily distributed to every corner of the sealed space R, and the water-stopping material 5 is sealed in the sealed space R. 5 can be filled suitably.

As above-mentioned, the water stop method of the sheet pile joint part 12 which raises the water stop of the location which connected the joint of the steel sheet pile 10 is a water stop method made according to following procedure (1)-(3).
(1) In the adjacent steel sheet pile 10, the hook-like portion 2 a of the joint 2 of the other steel sheet pile 10 is inserted into the fitting groove between the flange-like portion 1 a of the joint 1 of one steel sheet pile 10 and the sheet pile body 3. Fit together.
(2) The bolt 20 screwed into the first joint 1 is tightened, and the hook-like portion 2a of the second joint 2 in the fitting groove is pressed toward the hook-like portion 1a of the first joint 1. The flanged portion 2a of the second joint 2 is brought into contact with the flanged portion 1a of the first joint 1 and the sheet pile main body 3, and the sealed space R is formed between the inner surface of the first joint 1 and the flanged portion 2a. Form.
(3) The water-stopping material 5 is filled in the sealed space R formed by tightening the bolts 20, and the water-stopping material 5 is solidified.

The water stop structure of the sheet pile joint portion 12 obtained by the water stop method of such a sheet pile joint portion is the other steel sheet pile inserted between the flange-shaped portion 1a of the joint 1 of the one steel sheet pile 10 and the sheet pile main body 3. A bolt 20 that presses the hook-shaped portion 2 a of the joint 2 toward the hook-shaped portion 1 a of the first joint 1, and the bolt 20 pushes the hook-shaped portion 2 a of the second joint 2 of the first joint 1. A sealed space R formed by abutting the flange-shaped portion 1a and the sheet pile main body 3 and a waterstop material 5 filled in the sealed space R are provided.
And the volt | bolt 20 presses the collar-shaped part 2a of the 2nd coupling 2 toward the collar-shaped part 1a of the 1st coupling 1, and thereby the collar-shaped part 2a of the 2nd coupling 2 is made into the 1st coupling. 1 and the sheet pile main body 3 are in close contact with each other to form a sealed space R, and the pressure by the bolt 20 acts to expand the sealed space R more greatly. It is easy to inject the material 5, and the injected water stop material 5 does not leak from the sealed space R.

Thus, the sealed space R filled with the water blocking material 5 in the water blocking structure is a space formed in close contact so that the flange-shaped portion 2a of the second joint 2 closes the insertion slot of the fitting groove. Since the water blocking material 5 filled in the sealed space R does not leak, it is possible to perform water blocking between the joints.
Moreover, since the inlet 1b for inject | pouring the water stop material 5 into the sealed space R in this water stop structure can be provided in arbitrary positions, water stop, such as the lower end side of the steel sheet pile 10 in the sealed space R, for example. By providing the injection port 1b at a location where the material 5 is difficult to flow, the water-stopping material 5 can be spread and filled to every corner of the sealed space R.

  As described above, according to the water stop structure of the sheet pile joint portion and the water stop method of the sheet pile joint portion according to the present invention, the second inserted between the flange-like portion 1a of the first joint 1 and the sheet pile body 3 is provided. A sealed space R is formed between the first joint 1 and the second joint 2 by pressing the bowl-shaped portion 2a of the joint 2 toward the flange-shaped portion 1a of the first joint 1 with a bolt 20. It is possible to stop the water between the first joint 1 and the second joint 2 by filling the sealed space R with the water stopping material 5, and to reliably stop the water between the steel sheet piles 10. Can do.

  The present invention is not limited to the above embodiment.

For example, as illustrated in FIG. 6, the through-hole 22 a is used as a pressing member that presses the flange-shaped portion 2 a of the second joint 2 inserted into the insertion groove toward the flange-shaped portion 1 a of the first joint 1. You may make it use the volt | bolt 22 currently formed.
Thus, if the through-hole 22a which connects the outer side of the sheet pile joint part 12 and sealed space R is formed in the volt | bolt 22 which is a press member, the water stop material 5 will be inject | poured into the sealed space R from the through-hole 22a. Therefore, it is possible to omit forming the inlet 1b in the joint 1 of the steel sheet pile 10.
The inside of the sealed space R can also be cleaned by, for example, injecting high-pressure water into the sealed space R through the through-hole 22a of the bolt 22.

Further, as shown in FIG. 7, the hook-like portion 1 a of the first joint 1 of the steel sheet pile 10 inserted between the flange-like portion 2 a of the second joint 2 of the steel sheet pile 10 and the sheet pile main body 3 is secondly connected. The waterproof structure of the sheet pile joint part 12 of the structure provided with the volt | bolt 20 pressed toward the collar-like part 2a of the joint 2 of this may be sufficient.
In this case, the bolt 20 presses the hook-shaped portion 1 a of the first joint 1, and the hook-shaped portion 1 a of the first joint 1 is brought into contact with the hook-shaped portion 2 a of the second joint 2 and the sheet pile body 3. The closed space R is formed between the inner surface of the second joint 2 and the bowl-shaped portion 1a.
Then, as shown in FIG. 8, the second joint 2 is provided with an injection port 2b leading to the sealed space R, and the nozzle 30 is attached to the injection port 2b.
Thus, as shown in FIG. 9, the water stop material 5 between the steel sheet piles 10 is filled by injecting and filling the water stop material 5 into the sealed space R between the first joint 1 and the second joint 2 through the nozzle 30. It is possible to obtain a water stop structure that can reliably perform the above.

Moreover, the water stop structure of the sheet pile joint part according to the present invention, the water stop method of the sheet pile joint part is not limited to applying to the water stop of the sheet pile joint part in a newly built earth retaining wall or the like, but the existing steel sheet pile array It can also be applied to the water stoppage of the sheet pile joint part.
For example, in the existing steel sheet pile row which is an existing earth retaining wall formed by connecting a plurality of steel sheet piles 10, when water leakage from the sheet pile joint portion 12 is confirmed, the joint 1 is perforated and the perforation is performed. The bolt 20 is screwed and the hook-like part 2a of the joint 2 inserted into the fitting groove is pressed toward the hook-like part 1a of the first joint 1. Next, the water-stopping material R is injected and filled into the sealed space R formed between the joints by the pressing of the bolt 20 from the inlet 1b formed by drilling the joint 1.
By carrying out such a water-stop method for sheet pile joints, water stop treatment can be suitably performed even with existing steel sheet pile rows in which water leakage has occurred, and water stop between steel sheet piles is performed. Can do.

  In the above embodiment, the water stop material 5 is injected into the sealed space R from the inlet 1b of the first joint 1, the inlet 2b of the second joint 2, or the through-hole 22a of the bolt 22. However, the present invention is not limited to this, and the water stop material 5 is injected into the sealed space R from above the sealed space R on the upper end side of the steel sheet pile 10 or the high pressure water is injected. Water may be jetted.

  Moreover, the technique of this invention is not limited to a steel sheet pile, If it is a sheet pile which has a joint which can apply this invention, the water stop of the sheet pile joint part which fitted the joint of the sheet pile can also be aimed at.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 1st coupling 1a Saddle-shaped part 1b Inlet 2 2nd joint 2a Saddle-shaped part 2b Inlet 3 Sheet pile main body 3a Projection part 5 Water stop material 10 Steel sheet pile 12 Sheet pile joint part 20 Bolt (pressing member)
22 bolt (pressing member)
22a Through-hole 30 Nozzle R Sealed space

Claims (8)

It is a water stop structure of a sheet pile joint part in which a joint of one steel sheet pile and a joint of another steel sheet pile are fitted together,
The steel sheet pile has a pair of joints on both sides of the sheet pile main body, and each of the joints has a hook-like portion bent toward the sheet pile main body,
In the sheet pile joint part, the hook part of the joint of the other steel sheet pile inserted between the hook part of the joint of the one steel sheet pile and the sheet pile body is directed to the hook part of the joint of the one steel sheet pile. A pressing member that abuts the flanged portion of the joint of another steel sheet pile against the flanged portion of the joint of one steel sheet pile and the sheet pile main body,
A water-stopping material filled in a space formed by bringing the flange-shaped portion of the joint of another steel sheet pile into contact with the flange-shaped portion of the joint of one steel sheet pile and the sheet pile main body is provided. Water stop structure of sheet pile joint. The joint of the one steel sheet pile is provided with an inlet leading to the space,
The water stop structure for a sheet pile joint according to claim 1, wherein the water stop material is injected from the injection port. In the pressing member, a through-hole that connects the outside of the sheet pile joint portion and the space is formed,
The water stop structure for a sheet pile joint according to claim 1 or 2, wherein the water stop material is injected from the through hole.   The water stop structure of the sheet pile joint part according to any one of claims 1 to 3, wherein a plurality of the pressing members are provided along a longitudinal direction of the steel sheet pile. It is a water stop method of a sheet pile joint part in which a joint of one steel sheet pile and a joint of another steel sheet pile are fitted together,
The steel sheet pile has a pair of joints on both sides of the sheet pile main body, and each of the joints has a hook-like portion bent toward the sheet pile main body,
In the sheet pile joint portion, press the flange portion of the joint of the other steel sheet pile inserted between the flange portion of the joint of the steel sheet pile and the sheet pile body toward the flange portion of the joint of the one steel sheet pile. The sheet pile joint is characterized in that a water stop material is filled into a space formed by bringing the flange portion of another steel sheet pile joint into contact with the flange portion of the joint of one steel sheet pile and the sheet pile body. Water-stopping method.   6. The water stop method for a sheet pile joint according to claim 5, wherein the water stop material is injected from an inlet formed in a joint of one steel sheet pile so as to communicate with the space. Using a pressing member that presses the hook-like portion of the joint of the other steel sheet pile toward the hook-like portion of the joint of the one steel sheet pile, the hook-like portion of the joint of the other steel sheet pile is used as one steel sheet pile. Abutting against the flange of the joint and the sheet pile body,
The water stop method for a sheet pile joint according to claim 5 or 6, wherein the water stop material is injected into the space from a through-hole provided in the pressing member.   The water stop method for a sheet pile joint according to any one of claims 5 to 7, wherein the water stop material is injected after the inside of the space is washed.

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