JPH0349323B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for driving flexible water-stop sheet piles used for sheet pile walls constructed in land reclamation work, bank protection work, embankment construction work, etc. It is.

[Prior art]

Conventionally, as flexible water-stop sheet piles used for sheet pile walls, split sheet piles made by dividing U-shaped steel sheet piles along the center of the web are arranged in parallel at intervals,
A structure has been proposed in which each divided sheet pile is connected via a rubber belt-shaped waterproof material.

However, when driving the flexible water-stop sheet pile into the ground by meshing the joint of one split sheet pile with the joint of the steel sheet pile that has already been driven into the ground, Due to ground resistance, earth pressure, etc., as shown in FIGS. 12 and 13, the other divided sheet pile 9 may tilt, overlap, or deviate in the longitudinal direction of the sheet pile wall, as shown in FIGS. 12 and 13. , a pair of split sheet piles 8 and 9 in the flexible water-stop sheet pile 10 are tilted or deviated in the direction perpendicular to the sheet pile wall surface.
cannot be installed in the ground while maintaining a predetermined positional relationship, and when driving the flexible water-stop sheet pile 10 into relatively hard ground, the rubber band-shaped water-stop material 11 has a strong resistance. There is a risk of damage due to exposure.

[Purpose and structure of the invention]

The purpose of this invention is to provide a method for driving flexible water-stop sheet piles that can advantageously solve the above-mentioned problems. A sheet pile wall with a rigid sheet pile 1 for forming a sheet pile insertion space having an outline of a size equal to or larger than that is placed, and then the rigid sheet pile 1 is pulled out. Flexible water-stop sheet piles 4 made of split sheet piles 2 and rubber water-stop material 3 that connects each split sheet pile 2 are placed on both sides of the underground space 5 created by pulling out the rigid sheet pile 1 for forming the sheet pile insertion space. This method is for driving a flexible water-stop sheet pile, which is characterized by engaging certain sheet piles 6 and 7 and inserting the same into the ground.

Next, the present invention will be explained in detail using illustrated examples.

6 to 9 show a rigid sheet pile (rigid floor plan sheet pile) 1 for forming a sheet pile insertion space used in the present invention, in which a U-shaped steel sheet pile is divided along the center of the web to form a pair of split sheet piles 13. The webs 14 of each divided sheet pile 13 are arranged in parallel at intervals on the same plane, and extend over almost the entire length of the divided sheet pile 13 over the outer surface of the web 14 in each divided sheet pile 13. The side portions of the connecting plates 15 made of band-shaped steel plates are overlapped and fixed by welding, and a steel space forming and connecting member 16 with a groove-shaped cross section is arranged over the inner surface of the web 14 in each split sheet pile 13, and the space is The opening edge of the forming and connecting member 16 is fixed to the inner surface of the web 14 in each split sheet pile 13 by welding,
A spacer 17 made of a band-shaped steel plate is interposed between the widthwise middle part of the connecting plate 15 and the widthwise middle part of the groove plate in the space forming/connecting member 16, and is fixed by welding. 18 is arranged across the tip of each split sheet pile 13 and fixed by welding, and the tip shoe 18 connects the pair of split sheet piles 13, the connecting plate 15, and the space forming/connecting member 16.
The lower end of the space 19 formed by the above is covered.

10 and 11 show an example of the flexible water-stop sheet pile 4 used in the present invention, in which a U-shaped steel sheet pile is divided along the center of the web to form a pair of split sheet piles 2, The webs 20 of each split sheet pile 2 are arranged parallel to each other at intervals on the same plane, and are made of a rubber band-shaped water stop material 3 consisting of an arcuate groove-shaped portion 21 and mounting flanges 22 connected on both sides thereof. Each flange 22 is superimposed on the inner surface of the web 20 in each divided sheet pile 2, and a holding member 23 made of a band-shaped steel plate is superimposed on the surface of the flange 22, and the holding member 23 is overlapped with the web 20, the flange 22, and the holding member 23. The flange 22 is fastened to the web 20 by bolts 24 inserted therethrough.

The joint spacing of the rigid sheet pile 1 for forming the sheet pile insertion space and the joint spacing of the flexible water-stop sheet pile 4 are set to be the same, and the rubber band-shaped water-stop material 3 and the pressing member 23 in the flexible water-stop sheet pile 4 are set to be the same. The bolts 24 and 24 are set to fit in a portion surrounded by the outer surfaces of the connecting plate 15 and the space forming/connecting member 16 in the rigid sheet pile 1 for forming the sheet pile insertion space.

Next, a driving method according to an embodiment of the present invention using the sheet pile 1 for forming a sheet pile insertion space and the flexible water-stop sheet pile 4 will be described.

First, as shown in Fig. 1, an appropriate number of sheet piles 6 made of ordinary U-shaped steel sheet piles are interlocked with each other and sequentially driven into the ground 25, and then rigidity is attached to the joints of the sheet piles 6 at the ends to form a space for sheet pile insertion. The joints on one side of the sheet pile 1 are engaged and the rigid sheet pile 1 is driven into the ground 25.

Next, as shown in FIG. 2, an appropriate number of sheet piles 7 made of ordinary U-shaped steel sheet piles placed on the other side of the sheet pile 1 for forming the sheet pile insertion space were interlocked with each other and driven into the ground 25. Later, as shown in FIG. 3, the rigid sheet pile 1 for forming the sheet pile insertion space is removed, and an underground space 5 for inserting the flexible water-stop sheet pile 4 is formed between the adjacent sheet piles 6 and 7. .

Next, as shown in FIG. 4, the joints on both sides of the flexible water-stop sheet pile 4 are engaged with the joints of the sheet piles 6 and 7 on both sides of the underground space 5, and the flexible water-stop sheet pile 4 is Insert into the ground. When inserting the flexible water-stop sheet pile 4 into the ground, if it cannot be inserted by its own weight alone, it may be inserted by applying a pressing force or a striking force.

FIG. 5 shows a flexible water-stop sheet pile 4 and a portion of sheet piles 5 and 6 made of U-shaped steel sheet piles engaged on both sides thereof.

When carrying out this invention, any sheet piles other than U-shaped steel sheet piles may be used as the sheet piles 6 and 7.

〔Effect of the invention〕

According to this invention, a sheet pile wall with a rigid sheet pile 1 for forming a sheet pile insertion space having an outline of a size equal to or larger than that of a flexible water-stop sheet pile is placed, and then the rigid sheet pile 1 is pulled out. Later, a flexible water-stop sheet pile 4 is constructed, which is made up of a pair of split sheet piles 2 arranged in parallel at intervals and a rubber water-stop material 3 that connects each split sheet pile 2.
are inserted into the ground by engaging the sheet piles 6 and 7 on both sides of the underground space 5 created by pulling out the rigid sheet pile 1 for forming the sheet pile insertion space, so that the split sheet piles on both sides of the flexible water-stop sheet pile 4 are inserted into the ground. 2 are guided by sheet piles 6 and 7 installed at predetermined positions on both sides of the underground space 5, and the flexible water-stop sheet pile 4 can be inserted into the ground. For one split sheet pile 2 in , the other split sheet pile 2
However, the flexible water-stop sheet piles 4 are made so that they do not deviate or incline in the longitudinal direction of the sheet pile wall or in the direction perpendicular to the sheet pile wall surface, and so that the rubber water-stop material 3 is not damaged due to frictional resistance with the ground. It can be easily and accurately inserted into the ground with a predetermined verticality and a predetermined interval between divided sheet piles, and furthermore, since the flexible water-stop sheet pile 4 is inserted into the underground space 5 that has been prepared in advance, Effects such as being able to smoothly insert and install the flexible water-stop sheet pile 4 can be obtained.

[Brief explanation of drawings]

1 to 4 show the construction order of the method for driving flexible water-stop sheet piles according to an embodiment of the present invention, in which A is a front view and B is a cross-sectional plan view. FIG. 5 is a cross-sectional plan view showing a flexible water-stop sheet pile and a portion of the sheet pile engaged with both sides thereof.
Figures 6 to 9 show an example of a rigid sheet pile for forming a sheet pile insertion space used in the present invention, in which Figure 6 is a front view, Figure 7 is a vertical side view, and Figure 8 is an enlarged cross-sectional view. The plan view and FIG. 9 are enlarged longitudinal sectional side views of the vicinity of the tip. Figures 10 and 11
The figures show an example of a flexible waterstop sheet pile used in the present invention, with FIG. 10 being a front view showing a portion thereof, and FIG. 11 being an enlarged cross-sectional plan view. FIGS. 12 and 13 are front views showing an inclined state of split sheet piles in the conventional driving construction method for flexible water-stop sheet piles. In the figure, 1 is a rigid sheet pile for forming a sheet pile insertion space, 2 is a split sheet pile, 3 is a rubber water-stop sheet pile, 5 is an underground space, 6 and 7 are sheet piles, 13 is a split sheet pile, 1
5 is a connecting plate, 16 is a space forming/connecting member, 18 is a steel tip shoe, 21 is an arcuate grooved portion, 22 is a mounting flange, 23 is a holding member, 24 is a bolt, 2
5 is the ground.

Claims (1)

[Claims] 1. A sheet pile wall with a rigid sheet pile 1 for forming a sheet pile insertion space having an outline of a size equal to or larger than that of the flexible water-stop sheet pile is placed, and then after the rigid sheet pile 1 is pulled out, the interval is A flexible water-stop sheet pile 4 consisting of a pair of split sheet piles 2 arranged in parallel and a rubber water-stop material 3 connecting each split sheet pile 2 was produced by pulling out the rigid sheet pile 1 for forming a sheet pile insertion space. A construction method for driving flexible water-stop sheet piles, which is characterized by inserting the flexible water-stop sheet piles into the ground while meshing with sheet piles 6 and 7 on both sides of an underground space 5.