JPH0988044A - Temporary coffering construction method and steel sheet pile therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a water stop wall which endures large water pressure and is easy to be removed. SOLUTION: A guide frame having fixed on water bottom ground a first H-shaped steel sheet pile 13 and a second steel sheet pile 16 formed of the first H-shaped steel sheet pile 13 and plate bodies 14, 15 for putting one web of the steel sheet pile upon another is placed on a guide, and a double sheet pile wall 6 is constructed. Next, concrete is placed in the double sheet pile 6, a water stop wall 1 is constructed, after work completion, the straight line sheet pile of the steel sheet pile 16 is vertically cut as shown by arrows L1 , L2 ... between the two-overlapped plates 14, 15. And a block 19 is made between one plate body 15 of the second steel sheet pile 16 of the beginning and the other plate body 14 of the next disposed second steel sheet pile 16, and the water stop wall is disassembled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary shutoff method for temporarily shutting off a water area to provide an air space for construction, and a steel sheet pile used in the method.

[0002]

2. Description of the Related Art Recently, from the viewpoint of effective utilization of existing dams, plans are being made to add new intakes to dam dams to add power generation equipment. To open such an intake, it is necessary to temporarily cut off the water area around the intake that should be opened to create an air space for construction, but the water inside the dam is extremely deep (for example, 40 m or more). However, the conventional general cut-off method of constructing a sheet pile wall by driving steel sheet piles into the water bottom ground cannot withstand a large water pressure.

Therefore, it is considered that, for example, an H-shaped steel sheet pile is continuously driven into the water bottom ground to construct a double sheet pile wall, and concrete is cast in the double sheet pile wall to form a water stop wall. In this case, it is possible to withstand a large water pressure by appropriately adjusting the thickness of the poured concrete.

[0004]

However, according to the temporary closing method for placing concrete in the double sheet pile wall as described above, it is necessary to cut a thick concrete wall at the time of removal after the completion of construction. However, the removal work becomes extremely troublesome, and it not only takes a long time to remove it, but also the construction cost increases significantly.

The present invention has been made in view of the above background, and an object thereof is to provide a temporary shut-off method capable of constructing a water blocking wall that can withstand a large water pressure and can be easily removed. is there.

[0006]

In order to achieve the above object, in the temporary shut-off method of the present invention, a guide frame is fixed on the submerged ground, and then a steel sheet pile is driven with the guide frame as a guide to form a double layer. Constructing a sheet pile wall, the inside of the double sheet pile wall is divided into a plurality of sheets in the construction direction by a two-ply plate body that is previously separated from each other in the steel sheet pile, and then concrete is formed in the double sheet pile wall. To construct a water blocking wall, and after the construction inside the water blocking wall is completed, cut the steel sheet pile vertically between the two stacked plates, and place it next to one of the plates. The water blocking wall is disassembled in block units or in small block units obtained by dividing the block in the vertical direction.

In the temporary shut-off method constructed as described above, the concrete in the water blocking wall is separated between the two stacked plates, so that the steel sheet pile is longitudinally cut between the two stacked plates. The water blocking wall is divided into blocks only by cutting.

The present invention uses, as the steel sheet pile, a first H-shaped steel sheet pile and a second H-shaped steel sheet pile in which two stacked sheet bodies are arranged in place of the web thereof. At least one of the sheet piles and one of the second steel sheet piles may be alternately connected to form a double sheet pile wall. In this case, it is possible to construct a circular or semi-circular double sheet pile wall having a relatively small radius of curvature, which is convenient for closing small areas.

Further, according to the present invention, as the above steel sheet pile, a box-shaped one in which one of the partition plates is formed from two stacked sheet bodies is used, and a plurality of the steel sheet piles are piled while being connected to each other to form a double sheet pile. It is also possible to construct a sheet pile wall.
In this case, by using a box-shaped wide steel sheet pile, the efficiency in constructing a circular or semi-circular double sheet pile wall with a relatively large radius of curvature is increased, which is convenient for closing a large area. .

In the present invention, it is desirable that the guide frame has a truss structure in which hollow columns are arranged at nodes, and the piles are driven into the water bottom ground through the columns to fix the guide frame. In addition, a plurality of the guide frames are connected to each other in accordance with the water depth and stacked so as to be built on the water bottom ground.

The present invention is particularly effective when used for shutting off deep water dams. In this case, it is desirable to construct the water blocking wall in an arch shape, and both ends thereof are watertightly connected to the dam embankment. . By adopting an arched shape in this way, a compressive load is applied to the water blocking wall, which is advantageous in terms of strength.
The thickness of the water blocking wall can be reduced.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show the entire structure of a water blocking wall constructed by the temporary shutoff method of the present invention. This cutoff wall 1 is required when opening the intake 3 to the dam body 2, and is constructed in an arch shape (semicircle) with respect to the dam 2 and the intake should be opened. The front water area W of 3 is closed. The water stop wall 1 is composed of a double sheet pile wall 6 that is placed along a guide frame 5 to be described later that is fixed on the water bottom ground 4, and a concrete wall 7 that is placed in the double sheet pile wall 6. There is. In addition, the water bottom ground 4 includes the original ground and concrete structures such as fillets. Both ends (door stop) of the water blocking wall 1 are watertightly coupled to the dam bank 2 as will be described later, and the lower end of the double sheet pile wall 6 is the water bottom ground 4.
It is embedded in (Fig. 2). As a result, the inner side of the water blocking wall 1 is completely closed (drained) with respect to the water area W on the outer side thereof, and therefore the construction air space S is provided in front of the intake port 3 to be opened by draining the inner side. Will appear.

In this embodiment, the double sheet pile wall 6 is used.
As shown in FIGS. 3 and 4, a web plate (web) 12 is provided between two straight sheet piles 10 and 11 having joints at both ends.
H-shaped first steel sheet pile 13 having passed over and two webs of the first steel sheet pile 13 (sheets) 14, 15
And the H-shaped second steel sheet piles 16 formed from are alternately connected. Each web plate 1 in the second steel sheet pile 16
Reference numerals 4 and 15 are bent pieces 14 formed by bending the respective side edges.
a and 15a are stacked back to back in opposite directions, and the respective bent pieces 14a and 15a are fixed to the back surface of the straight sheet piles 10 and 11, for example, by welding, and the straight pieces are separated from each other. It is arranged between the sheet piles 10 and 11. Further, the first and second steel sheet piles 13 and 16 are
A straight sheet pile (for example, 1 sheet) located inside the double sheet pile wall 6
The width dimension of each straight sheet pile is set so that (0) is shorter than the straight sheet pile (for example, 11) located outside the double sheet pile wall 6, whereby the first steel sheet pile 13 and the first steel sheet pile 13 are arranged. By alternately driving the two steel sheet piles 16, the double sheet pile wall 6 having a predetermined radius of curvature can be constructed without difficulty. In addition, the straight sheet piles 10 and 11 which comprise each steel sheet pile 13 and 16
On the back surface of each of the web plates 12, 14 and 15,
L-shaped non-slip members 17 and 18 for restricting relative sliding with the concrete wall 7 are provided.

In the present embodiment, first, a guide frame is fixed on the water bottom ground 4, and along the guide frame 5, the first steel sheet pile 13 and the second steel sheet pile 16 are alternately connected. To build an arch-shaped double sheet pile wall 6,
Concrete is poured into the double sheet pile wall 6 to construct the concrete wall 7, and the double sheet pile wall 6 and the concrete wall 7 are formed.
Construct an arch-shaped water stop wall 1 that integrates and, and then
Both ends of this water blocking wall 1 are watertightly connected to the dam body 2.

As shown in FIG. 3, the water blocking wall 1 constructed in this manner has the concrete wall 7 separated between the two overlapping web plates 14 and 15 in the second steel sheet pile 16. . Therefore, after completion of the opening work of the intake 3 to the dam bank 2, when the straight sheet piles 10 and 11 of the second steel sheet pile 16 are cut in the longitudinal direction between the two stacked web sheets 14 and 15 (arrow L ₁ , L ₂ ...), and the water blocking wall 1 is between one web plate 15 in the second steel sheet pile 16 and the other web plate 14 in the second steel sheet pile 16 arranged next. And one of the first steel sheet piles 13 and the second steel sheet pile 1
It is divided into blocks 19 containing two of the six halves. Therefore, if you lift this block 19 as a unit,
The water blocking wall can be easily dismantled. At this time, the concrete wall 7 before and after the web plate 12 of the first steel sheet pile 13
The relative slippage with the first steel sheet pile 13 is surely regulated by the non-slip members 17 and 18. Therefore, when the block 19 is lifted, the concrete wall 7 is separated from the front and rear of the web plate 12. There is no.

In the dismantling, the block 19
May be hung up in units of small blocks that are further divided in the vertical direction. In this case, the water should be stopped in an appropriate length according to the capacity of the hoisting machine or in a unit (size) that allows easy post-treatment. The wall 1 can be dismantled. In addition, in the above-described embodiment, the first steel sheet pile 13 and the second steel sheet pile 1
Although 6 and 6 are alternately connected and driven, in the present invention, the second steel sheet pile 16 is arranged between the plurality of first steel sheet piles 13 that are connected and driven. However, in this case, the water blocking wall 1 can be disassembled in units of larger blocks. Further, the web plate 1 of the first steel sheet pile 13
Instead of providing the anti-slip member 18, the through-hole 2 may be provided with a through hole that allows the concrete to flow.

Here, as the guide frame 5 serving as a guide when the first steel sheet pile 13 and the second steel sheet pile 16 are driven, for example, as shown in FIG. 5, a hollow support column 20 is used as a node. A main body 22 of a truss structure, which is arranged and has a cross beam 21 passed between the columns 20, and semi-circular guide plates 23 fixed at two upper and lower positions of the main body 22 are used. The guide frame 5 is fixed on the water bottom soil 4 by the piles 24 driven into the water bottom soil 4 through the pillars 20, and a plurality of flanges 25 are provided on the upper and lower ends of the pillar 20 depending on the water depth. Fastening members (bolts, nuts) that are stacked through
Are connected by. In addition, 26 is a reinforcing bar for reinforcing the cross shape between adjacent columns 20. Further, both ends of the guide plate 23 are fixed to the dam bank 2 via anchor bolts 27 as shown in FIG.

Further, as shown in FIGS. 6 and 7, the door stop portion of the water blocking wall 1 is located at one end of the steel sheet pile (here, the second steel sheet pile 16) in the groove 30 formed in the bank 2. A portion of the second steel sheet pile 16 is inserted between the straight sheet piles 10 and 11 of the second steel sheet pile 16 and the inner wall of the groove 30, and a water-expandable rubber 31 is interposed between the second sheet pile 16 and the second steel sheet pile 16. In the groove 30 closed by the plates 14 and 15, for example, an underwater non-separable non-shrink mortar 32 is placed.

In order to form the groove 30 in the bank 2, after the first steel sheet pile 13 which is one before the second steel sheet pile 16 at the end is driven, the web of the first steel sheet pile 13 is formed. Concrete is poured into the double sheet pile wall 6 in the area rearward from the plate 12 (indicated by arrow C in FIG. 6) to form the concrete wall 7, and then the first wall as shown in FIGS. 8 and 9. A double steel sheet pile 33 is driven along the web sheet 12 of the steel sheet pile 13, an excavator 34 is moved downward along the double steel sheet pile 33, and a reaction force is applied to the concrete wall 7 at the back of the web sheet sheet 12. While taking, the groove 30 is processed by the cutter 35 in the excavator 34. Then, after processing the groove 30, the second steel sheet pile 16 at the end is driven while being connected to the first steel sheet pile 13, and thereafter, the web plates 14 of the two layers of the second steel sheet pile 16 are stacked.
15 and the web plate 12 of the first steel sheet pile 13 to pour concrete to extend the concrete wall 7, and further to install the water-expandable rubber 31 and the inseparable non-shrinkable mortar 32 in water. Place and do. After the construction is completed, the second web sheet plates 14 and 15 of the second steel sheet pile 16 at the end are stacked.
If the straight sheet piles 10 and 11 are cut between them (shown by an arrow L _{0 in} FIG. 7), the concrete wall 7 and the mortar (mortar column) 32 in the groove 30 are separated and the water blocking wall 1 is dismantled. There is no obstacle.

In the above embodiment, the water blocking wall 1
Part of the second steel sheet pile 16 at the end is fitted into the groove 30 formed in the dam body 2 at the door contact portions at both ends of the above, and water expansion between the second steel sheet pile 16 and the dam body 2 is performed. The rubber 31 and the underwater non-separable non-shrinkable mortar 32 are sealed, but this door contact portion can be structured as shown in FIG. That is, the pair of brackets 36 are fixed to the front surface of the bank 2 in the longitudinal direction using the anchor bolts 37,
The second steel sheet pile 16 at the end is provided in the pair of brackets 36.
Part of the bracket (removing the joint part) is inserted, and the pair of brackets 3
A rubber seal plate 38 is interposed between the bottom of 6 and the bank 2, and a hard rubber wedge 39 is provided between the pair of brackets 36 and the straight sheet piles 10 and 11 of the second steel sheet pile 16. Further, for example, an underwater non-separable non-shrinking mortar 40 is placed in the groove 30 closed by the web plates 14 and 15 of the second steel sheet pile 16 which are two-layered. According to such a door stop structure, as in the above embodiment, the bank 2
Since it is not necessary to process the groove 30 in the groove, the construction becomes easy.

Further, in the above-described embodiment, the H-shaped first steel sheet pile 13 and the H-shaped second steel sheet pile 16 formed by the webs of the two stacked web sheets 14 and 15 are used as the steel sheet piles. Although a combination is used, the present invention can use a box-shaped steel sheet pile 41 as shown in FIG.
In this steel sheet pile 41, a plurality of partition plates 44 are passed between wide straight sheet piles 42 and 43, and one of the partition plates, especially the one located in the center is separated from each other and stacked. It is formed from the bodies 45 and 46. This steel sheet pile 41
In the case of using the above, the double sheet pile wall 6 is completed only by placing the guide frame 5 in the guide while connecting a plurality of them, and then concrete is placed in the double sheet pile wall 6. Then, the water stop wall 1 is completed. Then, after the construction was completed,
If the straight sheet piles 42, 43 are vertically cut (indicated by the arrow L) between the two plate members 45 and 46, one of the double plate members 46 and then It is divided into blocks between the arranged steel sheet pile 41 and the other of the double plate bodies 45, and therefore the water blocking wall 1 is made with this block as a unit.
Can be dismantled. By providing the partition plate 44 with the same anti-slip members 17 and 18 or through holes that allow the flow of concrete as described above, the cast concrete wall is separated between the adjacent steel sheet piles 41 during the dismantling. Things will disappear.

[0023]

EXAMPLE An example of the present invention applied to a dam lake deadline will be described below with reference to FIG. The same parts as those shown in FIGS. 1 to 9 are designated by the same reference numerals.

First, as shown in FIG. 12, the construction machine 50 is placed on the dam bank 2, and the construction machine 50 is used to move the dam lake 5
The dredging bucket 52 is hung in 1 and the underwater camera 5
While operating 3 remotely, the mud 54 accumulated on the water bottom ground 4 is dredged to expose the water bottom ground 4. Next, as shown in the figure, the guide frame 5 separately manufactured using the same construction machine 50 is suspended along the dam bank 2, and temporarily fixed using the fixing member 55 extended from the dam bank 2. While fixing the position, other conducting frames 5 are sequentially stacked on the first conducting frame 5 and suspended while connecting them to each other. The guide frame 5 has, for example, a radius of 7 m on the outer periphery of the guide plate 23 and a height of about 10 m. When the water depth is 40 m, four of them are stacked, and as shown in FIG. Guide frame 5 to submarine ground 4
To land. After that, as shown in the same manner, the pile 24 is inserted into the hollow column 20 of the guide frame 5, and the vibro hammer 5 is inserted.
This pile 24 is driven into the subseabed ground 4 using 6 to fix the plurality of guide frames 5. The uppermost guide frame 5 is fixed to the dam body 2 with anchor bolts 27 as shown in FIG. 6 above.

Next, as shown in FIG. 12, the construction machine 5
0 is used for a long steel sheet pile (here, the first steel sheet pile 13
And the second steel sheet pile 16) are suspended along the guide plate 23 of the guide frame 5, and the steel sheet piles 13 and 16 are alternately connected using the vibro hammer 56 in the manner shown in FIG. It is driven into the ground 4 and the double sheet pile wall 6 is constructed in an arch shape. As the first and second steel sheet piles 13 and 16,
As an example, one straight sheet pile 10 having a width of 45 cm, the other straight sheet pile 11 having a width of 50 cm, and the web 12 having a height of 50 cm are used. When driving the steel sheet piles 13 and 16, a water jet may be used together. Next, as shown in the figure, using the tremie pipe 57, concrete is placed inside the double sheet pile wall 6 to construct the water blocking wall 1, and the door stop portion of the water blocking wall 1 is mentioned above. It is watertightly connected to the dam body 2 as shown in FIGS. 6 and 7.

Thereafter, as shown in the same manner, concrete is placed on the inner bottom of the water blocking wall 1 by using a tremie pipe 57, and a pedestal 58 is placed on the lower surface level of the intake port 3 to be opened. The pedestal 58 serves as a basis for constructing a gate later. Then, the inside of the water blocking wall 1 is drained to create a construction air space S (FIG. 1), and the heavy equipment and workers are lowered on the pedestal 58 at the bottom of the air space S to open the intake port 3 or Performs gate installation work, etc. Then, after the construction is completed, with the inside of the water blocking wall 1 being the air space S, the inner straight sheet pile between the two stacked web sheets 14 and 15 in the second steel sheet pile 16 is carried out in the manner shown in FIG. 10 is cut in the vertical direction, and then water is supplied to the inside of the water intake wall 1 to fill it with water. Then, as shown in FIG. 12, the water blocking wall 1
Diving outside of the water, and cutting the outer straight sheet pile 11 in the longitudinal direction between the web plates 14 and 15 to divide the water blocking wall 1 into blocks 19 units (FIG. 3). While vertically dividing the 19 into small blocks 19a, the construction machine 50 sequentially lifts and removes the guide block 5, and finally the guide frame 5 is removed.

[0027]

As described above in detail, according to the temporary shut-off method according to the present invention, it is possible to construct concrete in the double sheet pile wall to construct a water blocking wall that can withstand a large water pressure. . Also, by simply cutting the steel sheet pile vertically between the two stacked sheet piles placed inside the double sheet pile wall, the water blocking wall can be divided into blocks and easily removed, which is suitable for temporary cutoffs in deep water. As a result, not only the construction period can be shortened, but also the construction cost can be greatly reduced. Moreover, since it can be installed without lowering the water level, it is not limited by time and its utility value is great.

[Brief description of drawings]

FIG. 1 is a plan view showing a structure of a water blocking wall constructed by a temporary shutoff method according to the present invention.

FIG. 2 is a side view taken along the line A of FIG.

FIG. 3 is a cross-sectional view showing an enlarged part of the water blocking wall.

FIG. 4 is a plan view showing an example of a steel sheet pile used in the temporary shutoff method.

FIG. 5 is a side view showing a structure of a guide frame used in the temporary closing method.

FIG. 6 is a cross-sectional view showing a structure of a door stop portion of a water blocking wall constructed by the temporary closing method.

FIG. 7 is a detailed view of a portion B in FIG. 6;

FIG. 8 is a plan view showing the work content of the door stop portion of the water blocking wall.

[Fig. 9] Fig. 9 is a side view showing the construction contents of the door stop portion of the water blocking wall.

FIG. 10 is a cross-sectional view showing another structure of the door stop portion of the water blocking wall.

FIG. 11 is a plan view showing another example of the steel sheet pile used in the temporary cut-off method.

FIG. 12 is a schematic view showing a construction procedure of the temporary closing method in order.

[Explanation of symbols]

 1 Water stop wall 2 Dam embankment 4 Water bottom ground 5 Guide frame 6 Double sheet pile wall 7 Concrete wall 10,11 Straight sheet pile 12 Web 13 H type 1st steel sheet pile 14,15 Web sheet (double sheet sheet) 16 H-shaped second steel sheet pile 17,18 Anti-slip member 19 Block 19a Small block 24 Pile 41 Box-shaped steel sheet pile 44 Partition plate 45,46 Partition plate (two stacked plates)

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] January 23, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

[0023]

EXAMPLE An example of the present invention applied to a dam lake deadline will be described below with reference to FIGS. 12 and 13 . The same parts as those shown in FIGS. 1 to 9 are designated by the same reference numerals.

[Procedure amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction contents]

Next, as shown in FIG. 13 , a long steel sheet pile (here, the first steel sheet pile 1 is used by using the construction machine 50.
3 and the second steel sheet pile 16) are hung along the guide plate 23 of the guide frame 5, and the steel sheet piles 13 and 16 are alternately connected using the vibro hammer 56 in the manner shown in FIG. A double sheet pile wall 6 is constructed in an arch shape by driving it into the water bottom ground 4. As the first and second steel sheet piles 13 and 16, as an example, the width of one straight sheet pile 10 is 45 cm, the width of the other straight sheet pile 11 is 50 cm, and the height of the web 12 is 50 c.
m. When driving the steel sheet piles 13 and 16, a water jet may be used together. Next, as shown in the figure, using the tremie pipe 57, concrete is placed inside the double sheet pile wall 6 to construct the water blocking wall 1,
The door stop portion of the water blocking wall 1 is watertightly connected to the dam bank 2 in the manner shown in FIGS. 6 and 7.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

Thereafter, as shown in the same manner, the water blocking wall 1
Concrete is placed on the inner bottom of the tank using a tremie pipe 57, and a pedestal 58 is placed on the lower surface level of the intake port 3 to be opened. The pedestal 58 serves as a basis for constructing a gate later. Then, the inside of the water blocking wall 1 is drained to create a construction air space S (FIG. 1), and the heavy equipment and workers are lowered onto the pedestal 58 at the bottom of the air space S,
Opening the intake 3 and installing gates. Then, after the construction is completed, with the inside of the water blocking wall 1 being the air space S, the inside of the second steel sheet pile 16 between the two overlapping web plates 14 and 15 is arranged as shown in FIG. The straight sheet pile 10 is cut in the vertical direction, and then water is supplied to the inside of the water intake wall 1 to fill it with water. After that, as shown in FIG. 13 , the diver 59 is dipped outside the water blocking wall 1, and the outer linear sheet pile 11 is vertically cut between the web plates 14 and 15 to cut the water blocking wall 1.
Is divided into blocks 19 units (FIG. 3), and the blocks 19 are vertically lifted by the construction machine 50 while being divided into small blocks 19a, and finally the guide frame 5 is scattered.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] FIG.

[Correction method] Added

[Correction contents]

FIG. 13 is a schematic view showing, in sequence, the construction procedure of this temporary cut-off method.

[Procedure Amendment 5]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

[Figure 3]

[Fig. 7]

[Figure 8]

[Fig. 2]

FIG. 4

[Figure 5]

FIG. 6

[Fig. 9]

[Figure 10]

FIG. 11

FIG.

FIG. 13

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaoru Sawazawa 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Osaka Toyo Construction Co., Ltd.

Claims (12)

[Claims] 1. A double sheet pile wall is constructed by fixing a guide frame on the submerged ground, and then a steel sheet pile is driven by the guide frame to guide the inside of the double sheet pile wall to the steel sheet pile in advance. Partition into a plurality of layers in the construction direction by two stacked plate bodies that are separated from each other, then construct a water blocking wall by placing concrete in the double sheet pile wall, in the water blocking wall After the construction is completed, the steel sheet pile is cut in the vertical direction between the two stacked plate bodies, and one plate body and the plate body arranged next are regarded as one block, and the block unit or the block is A temporary shutoff method, characterized in that the water blocking wall is disassembled in units of small blocks divided in the vertical direction. 2. An H-shaped first steel sheet pile and an H-shaped second steel sheet pile in which two stacked sheet bodies are arranged instead of the web are prepared, and at least one of the first steel sheet piles is provided. The second
2. The temporary cut-off method according to claim 1, wherein the double sheet pile wall is constructed by alternately placing and connecting one of the steel sheet piles of the above. 3. A double sheet pile wall is constructed by preparing a box-shaped steel sheet pile in which two stacked sheet bodies are arranged and placing a plurality of the steel sheet piles while mutually connecting them. The temporary deadline construction method according to claim 1. 4. The temporary frame according to claim 1, wherein the guide frame has a truss structure in which hollow columns are arranged at nodes, and the pile is driven into the subseabed ground through the columns to fix the guide frame. Deadline method. 5. The temporary cut-off construction method according to claim 1, wherein a plurality of guide frames are connected to each other and stacked on each other to be built on the water bottom ground. 6. The water blocking wall is constructed in an arch shape, and both ends thereof are watertightly connected to the dam bank.
5. The temporary deadline construction method according to any one of 5 above. 7. A steel sheet pile for a temporary cutoff method comprising a combination of an H-shaped first steel sheet pile and an H-shaped second steel sheet pile formed by stacking two webs of the first steel sheet pile. . 8. The steel sheet pile for the temporary cut-off method according to claim 7, wherein the web of the first steel sheet pile is provided with an anti-slip member that restricts relative sliding with the cast concrete. 9. The steel sheet pile for a temporary cutoff method according to claim 7, wherein the web of the first steel sheet pile is provided with a through hole that allows the flow of concrete. 10. A box-shaped steel sheet pile in which one of the partition plates is formed of two stacked plates. 11. The steel sheet pile for the temporary cut-off method according to claim 10, wherein the partition plate is provided with an anti-slip member that restricts relative sliding with the cast concrete. 12. The steel sheet pile for the temporary cut-off method according to claim 10, wherein the partition plate is provided with a through hole that allows the concrete to flow therethrough.