JPS645129B2 - - Google Patents

Description

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

[Prior art]

BACKGROUND ART Conventionally, as a flexible extensible water-stop sheet pile used for a sheet pile wall, one having a structure in which a pair of split-type sheet piles made by dividing a U-shaped steel sheet pile are connected by a rubber band-shaped water-stop material is known.

However, in the case of the flexible expandable water-stop sheet pile of this structure, the middle part of the pair of split type sheet piles made by dividing the U-shaped steel sheet piles is not connected by a strong connecting member and is arranged separately. The rigidity of the flexible extensible water-stop sheet pile is small, so when the head of the flexible extensible water-stop sheet pile is hit with a hammer or the like and driven into the ground, the middle part of the split sheet pile will sway laterally, so the impact force from the hammer etc. is applied to each split sheet pile. Therefore, there is a problem that the driving efficiency of sheet pile driving is low.

[Purpose and structure of the invention]

The purpose of this invention is to provide a method for driving flexible extensible water-stop sheet piles for sheet pile walls that can advantageously solve the above-mentioned problems. A flexible extensible water-stop sheet pile 3 consisting of a pair of extending steel split-type sheet piles 1 and a rubber belt-shaped water-stop material 2 that connects each split-type sheet pile 1 is a large number of substantially horizontal steel sheets spaced apart in the longitudinal direction. A connecting plate made of aluminum is placed, one side in the width direction on both sides of the connecting plate in the longitudinal direction is temporarily fixed to each split type sheet pile 1, and then the flexible expandable water stop sheet pile 3 is driven into the ground 4. The method for driving flexible extensible water-stop sheet piles for sheet pile walls is characterized in that the temporary fixing parts are destroyed by the resistance of the ground 4 and the connecting plates are sequentially removed.

〔Example〕

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

Figures 4 to 10 show a flexible extensible waterstop sheet pile with a connecting member used in an embodiment of the present invention, which is a pair of split steel sheet piles in the shape of a U-shaped steel sheet pile divided at the center of the web. The rubber band-shaped water stop material 2 has webs 5 of the sheet pile 1 arranged at intervals on the same plane, a plurality of circular arc-shaped bent portions 6 in the middle, and mounting flanges 7 on both sides in the width direction. A holding member 8 made of a strip steel plate is disposed over the inner surface of the web 5 and is in contact with the surface of the mounting flange 7, and a large number of bolts 9 are arranged at intervals in the longitudinal direction of the web 5. The bolts 9 are inserted into through holes provided in the web 5, the mounting flange 7, and the holding member 8, and the mounting flange 7 is attached to the web 5 by the tightening force of the bolts 9.
the pair of split type sheet piles 1;
A flexible extensible water-stop sheet pile 3 is constituted by the rubber band-shaped water-stop material 2 connected to each split type sheet pile 1.

A steel upper connecting member 10 is arranged above the band-shaped water stop material 2 at a sheet pile cutting interval D, and the outer surface of the web 5 at the upper end of each split sheet pile 1 is brought into contact with the upper connecting member 10. , upper connecting member 10
Each of the split sheet piles 1 is fixed by welding.

As shown in FIGS. 11 and 12, a pair of inclined plates 11 arranged in a V-shape and a vertical mounting plate 1
2 and reinforcing ribs 13 are arranged in contact with or close to each other, and the inclined plate 11 of each split type end fitting 14 is arranged in contact with or close to each other.
A steel lower connecting member 15 is brought into contact with the lower connecting member 15, and the lower connecting member 15 is welded to each split-type tip fitting 14, but at least one of the split-type tip fittings 14 and the lower connecting member 15 are joined with low strength by spot welding or the like so that they can be separated relatively easily, and each split end fitting 14 is fixed to the lower end of each split sheet pile 1 by welding.

A large number of connecting plates 16 made of horizontal or nearly horizontal steel plates are arranged on the outside of the web 5 in a pair of split sheet piles 1 at intervals in the longitudinal direction of the sheet piles, that is, in the vertical direction, and one side in the width direction of each connecting plate 16 The upper surface of the section and each of the webs 5 are temporarily fixed by low-strength joining means such as spot welding or other low-strength welding 17. Further, between the flanges 18 of the pair of split sheet piles 1, connecting plates 19 made of horizontal or nearly horizontal steel plates are arranged at intervals in the vertical direction, and the upper surface of one side in the width direction of each connecting plate 19 and each of the flanges 18 are temporarily fixed by low-strength joining means such as spot welding or other low-strength welding 17.

When driving the head of the flexible extensible water-stopping sheet pile with a connecting plate configured as described above with a hammer or the like to drive the sheet pile into the ground 4, or when necessary, jet water for excavation is poured from the tip of the sheet pile. When driving the sheet piles into the ground 4 by hitting them with a hammer or the like while injecting a Since they are connected via a large number of connecting plates 16 and 19, lateral vibration of each split sheet pile 1 is prevented, and therefore, the impact force of a hammer, etc. is effectively transmitted to the lower end of each split sheet pile 1. You can do the driving by using the following steps.

Further, as the driving of the flexible extensible waterstop sheet pile with a connecting plate progresses and the connecting plate 16 hits the surface, as shown in FIG. Due to the resistance of the ground 4, the temporarily fixed part of the connecting plate 16 was bent and destroyed as shown in Fig. 2, and the temporarily fixed part was destroyed as shown in Fig. 3. The sheet pile is driven into the ground 4 with the connecting plate 16 left on the ground surface.

The other connecting plates 16 and 19 are also automatically removed one after another as the sheet pile driving progresses in the same manner as in the above case.

After the sheet pile driving is completed, each split type sheet pile 1 is cut by melt cutting or other means within the range of the sheet pile cutting interval D.

As shown in FIG. 13, the flexible expandable waterstop sheet pile is interposed at an appropriate position on the sheet pile wall, and the joint portion 20 of the pair of split type sheet piles 1 and the joint portion 22 of the steel sheet pile 21 of the sheet pile wall are engaged. Ru.

When carrying out the present invention, the split sheet pile 1 may have an arbitrary cross section other than that shown in the drawings. Further, as the connecting plate, a horizontal plate having ribs integrally provided on the upper or lower surface may be used.Furthermore, a connecting plate 16 attached to the outside of the web 5 may be used.
Either one of the connecting plate 19 and the connecting plate 19 attached to the flange 18 may be omitted.

〔Effect of the invention〕

According to this invention, the flexible extensible water-stop sheet pile 3 is made up of a pair of steel split-type sheet piles 1 that extend in the vertical direction and a rubber strip-shaped water-stop material 2 that connects each split-type sheet pile 1.
A large number of substantially horizontal steel connecting plates are arranged at intervals in the longitudinal direction, one side in the width direction on both sides of the connecting plate is temporarily fixed to each split type sheet pile 1, and then Since the flexible expandable water-stop sheet pile 3 is driven into the ground 4, the rigidity of the flexible expandable water-stop sheet pile 3 is increased by the large number of connecting plates, and each split type sheet pile is used when driving the sheet pile with a hammer or the like. It is possible to almost eliminate lateral vibration in the middle part of the sheet pile 1, and as a result, the impact force from a hammer or the like can be sufficiently transmitted to the lower part of each split type sheet pile 1, thereby improving the efficiency of sheet pile driving work. If the flexible extensible waterstop sheet pile 3 is continued to be driven after the connecting plate hits the ground surface, the temporary fixing part will be destroyed by the resistance of the ground 4 acting on the connecting plate. By simply driving the flexible expandable waterstop sheet piles 3, each connecting plate can be automatically removed when it hits the ground surface. Since there is no need to perform the removal work, effects such as the ability to easily and quickly perform the work of driving the flexible extensible waterstop sheet pile 3 to prevent lateral vibration can be obtained.

[Brief explanation of drawings]

The drawings show embodiments of the invention,
Figures 1 to 3 are front views showing the state in which sheet piles are being driven, Figure 4 is a partially cutaway front view of a flexible extensible water stop sheet pile with connecting plates, and Figure 5 is a longitudinal side view thereof. , Fig. 6 is a front view showing an enlarged view of the lower part of Fig. 4, Fig. 7 is a vertical side view showing an enlarged view of the lower part of Fig. 5, and Fig. 8 is an enlarged cross section taken along the line A--A of Fig. figure,
Fig. 9 is an enlarged sectional view taken along the line B-B in Fig. 7, Fig. 10 is an enlarged sectional view taken along the line CC in Fig. 4, Fig. 11 is a plan view of the tip fitting, and Fig. 12 is a longitudinal sectional side view thereof. , 1st
FIG. 3 is a cross-sectional plan view showing the relationship between the flexible elastic water-stopping sheet pile and the sheet pile of the sheet pile wall. In the figure, 1 is a steel split type sheet pile, 2 is a rubber band-shaped water stop material, 3 is a flexible expandable water stop sheet pile, 4 is the ground,
7 is a mounting flange, 8 is a holding member, 9 is a bolt,
10 is a steel upper connecting member, 14 is a split type tip fitting, 15 is a steel lower connecting member, 16 is a connecting plate, 1
7 is a low-strength weld, 19 is a connecting plate, and 21 is a steel sheet pile.

Claims (1)

[Claims] 1 A pair of steel split sheet piles that extend vertically 1
and a rubber band-shaped water stop material 2 that connects each split type sheet pile 1.
A large number of substantially horizontal steel connecting plates are arranged at intervals in the longitudinal direction of the flexible extensible waterstop sheet pile 3 consisting of,
One side in the width direction on both sides in the longitudinal direction of the connecting plate is temporarily fixed to each split type sheet pile 1, and then the flexible expandable waterstop sheet pile 3 is driven into the ground 4, and the A method for driving flexible extensible waterstop sheet piles for sheet pile walls, characterized in that the temporary fixing portions are destroyed by resistance and the connecting plates are sequentially removed.