JP4349638B2 - Yaita wall revetment - Google Patents

Description

  The present invention relates to a sheet pile wall revetment in which sheet piles are driven into a river or coastal quay in a row and the upper end of the sheet pile row is covered with a crest block.

  In this type of sheet pile wall revetment, the upper end of the sheet pile (steel sheet pile) after the installation work is unstable and there are problems with the strength, and there is also a problem with the landscape. There is a means for covering the upper end portion with a concrete cap block and fixing it with concrete (for example, see Patent Document 1).

  And the cap block in this conventional sheet pile wall revetment has a cross-sectional shape with a U-shaped cross section, and a bottom plate whose tip is opposed to the side surface of the sheet pile is provided on one inner side of the bottom, and is used at the upper end of the sheet pile. After covering, the ready-mixed concrete is poured into the space closed by the bottom plate from the opening provided in the upper part of the cap block and fixed. At this time, if there is a gap between the tip of the bottom plate and the side surface of the sheet pile, the ready-mixed concrete flows out of the gap and is wasted.

Japanese Patent No. 2704610

  The cap block in the above-mentioned conventional sheet pile wall revetment cannot be accurately determined even if it uses a positioning bracket when covering the upper end of the sheet pile with the positioning plate. The gap between the side faces of the sheet pile was not constant. In particular, since the side surfaces of the sheet pile row after driving are inevitably irregular, the above-mentioned gaps differ for each sheet pile.

  For this reason, the packing shape to be adhered between the bottom plate and the side surface of the sheet pile must also be prepared variously on site according to the shape (interval) of the gap. It was not easy and time consuming.

  The present invention has been made in view of the above, and when the cap block is placed on the upper end of the sheet pile row, filling the gap material that closes the gap between the bottom plate and the side surface of the sheet pile row, the gap is uneven. Nevertheless, the purpose of the present invention is to provide a sheet pile wall revetment that can be easily performed on site, and that the height of the crest block relative to the sheet pile row can be easily adjusted. .

In order to achieve the above-mentioned purpose, a cap stand block provided with a bottom plate having a tip side on the inner side of one side wall along the side shape of the sheet pile row, at the upper end of the sheet pile row formed by driving the sheet piles in a row , In the sheet pile wall revetment in which concrete is driven into the space between the side wall of the cap rest block and the bottom plate and the side of the sheet pile row, in contact with the height adjustment fitting installed at the upper end of the sheet pile row , the above The edge of the bottom plate of the cap block is an inclined surface whose upper side recedes with respect to the tip of the lower surface of the bottom plate, and the longitudinal direction is between the inner side surface of the side wall on the side where the bottom plate of the cap block is provided and the side surface of the sheet pile row A wedge-shaped gap having a zigzag shape and a wider cross-sectional shape is formed, and a gap material having a wedge-shaped cross-section is inserted into the gap from above, and the gap is sealed with the gap material. In the above space Implanted cleat from above, also the height adjustment fitting, the member hooked to the upper end portion to the hook-shaped, and the nut member which is fixed parallel to the member hooked on the hooking member, a bolt screwed into the nut member The rod-shaped top contact member is provided at a right angle to the hook member on the inner top portion of the hook-shaped portion of the hook member, and one side surface of the sheet pile is in contact with one side surface of the hook-shaped portion of the hook member. The side surface contact member is located on the other side, the side surface contact member that contacts the other side surface of the sheet pile on the other side surface, and the side surface contact member that is positioned on the side where the nut member is fixed. The top contact portion provided on the inner top portion of the hook-shaped portion of the hook member of the height adjustment fitting is configured to be shifted vertically in the direction away from the top portion of the hook member. Is in contact with the upper end of the sheet pile row, and the side contact member provided inside the hook member is placed in contact with the side surface of the sheet pile, and the upper end of the bolt is brought into contact with the lower surface of the stay provided in the cap rest block. This is the configuration.

In the configuration of the present invention, the gap between the bottom plate of the crest block and the sheet pile array is formed in a wedge shape with the cross-sectional shape widened on the upper side , and a gap material having a wedge-shaped cross section is inserted into the gap from above. By doing so, even if the gap does not become a constant interval depending on the construction state of the sheet pile wall revetment, or even if this gap varies from construction to construction, it is one type by inserting a gap material into this gap This gap can be closed with a gap material, and the gap material can be easily filled in the gap by field work.

Moreover, since the said clearance gap and clearance gap material are wedge-shaped, both are closely fitted and can close the said clearance gap without leaking the ready-mixed concrete cast from the upper side .

Further, in the configuration of the present invention , the abutting member fixed to the hooking top of the hooking member of the height adjusting bracket for adjusting the height direction position of the crest block with respect to the sheet pile row is perpendicular to the hooking member. In addition, the hook member has a side contact member that contacts one side surface of the sheet pile on one side surface of the hook-shaped portion of the hook member, and the other side surface contacts the other side surface of the sheet pile. The side contact member that contacts the side contact member that is located on the side to which the nut member is fixed is shifted up and down in the direction away from the top of the hook member with respect to the side contact member that is located on the other side. by the fact that it is configured, hook when hooking member sheet pile column, along abutment member provided on the top portion on the upper surface of the sheet pile column, also hooked each abutment member provided on the side opposite to the member Will be the side which is fixed to the nut member abuts by shifting the position vertically located below the side on both sides of the sheet pile rows, which makes it possible to hook the vertical shaped hooking member with respect to sheet pile column. Therefore, the bolt for supporting the crest block can be made vertical, and the height of the crest block can be easily adjusted by this bolt, and by extension, the crest block can be installed orderly along the sheet pile.

  Embodiments of the present invention will be described with reference to the drawings. In this embodiment, an example using a hat-shaped steel sheet pile is shown.

  FIG. 1 is a plan view showing a sheet pile array in a state in which hat-shaped steel sheet piles 1 are driven in a row, and this steel sheet pile 1 is an intermediate portion 1c with respect to both side portions 1a and 1b located on the same plane. Is formed into a hat-like shape, and engaging portions 2a and 2b are provided at the edges of both sides 1a and 1b. The steel sheet piles 1 are adjacent to each other and are driven in a row in a state where the engaging portions 2a and 2b of the side portions are engaged. This sheet pile array is driven into a position that divides the mountain side and the sea (river) side, and the sea side surface is exposed over a predetermined height.

  FIGS. 2 to 5 show the cap block 3 that covers the upper end portion of the sheet pile shown in FIG. 1, and this cap block 3 is larger than the dimension in the thickness direction of the steel sheet pile 1 (the height of the hat portion). The side walls 4 and 5 that face each other at intervals are connected to the upper ends of both side walls 4 and 5 by stays 6, 6,. At the inner lower end of one side wall 4, a bottom plate 7 having a mountain-shaped tip is projected at a plurality of locations in the longitudinal direction.

  The mutual space | interval of the said bottom plate 7 is the same as the mutual space | interval of the sea side recessed part of the sheet pile row | line | column shown in FIG. 1, and the protrusion shape of this bottom plate 7 is the said sea side recessed part of the said sheet pile row | line | column. The shape is substantially the same.

The end side 7a of each bottom plate 7 has a slope shape with the upper side retreating with respect to the tip of the lower surface thereof, and the side surface 4a at the lower end of the inner surface of the side wall 4 on which each bottom plate 7 projects is The slope is parallel to the slope of the bottom plate 7. Eventually, a slope that is zigzag continuous in the longitudinal direction is formed on the inner surface of the lower end of the side wall 4.

  Positioned on the inner surface of each intermediate portion in the height direction between the bottom plates 7 of the side wall 4 on the side where the bottom plate 7 of the crest block 3 is provided and on the other side wall 5 at the position facing the tip of each bottom plate 7. A metal nut 8 is inserted. Further, connecting metal nuts 9 are inserted into the inner surfaces of the intermediate portions in the height direction of both longitudinal ends of the side walls 4 and 5.

  Next, as described above, a revetment construction method in which the cap block 3 is covered on the upper end portion of the sheet pile array using the hat-shaped steel sheet pile 1 will be described.

  As shown in FIG. 1, the hat-shaped steel sheet piles 1 are driven in the same posture, and the adjacent engaging portions 2a and 2b are engaged with each other so that they are sequentially arranged. And the sheet pile row | line | column of this state is constructed | assembled in the position which divides the sea (river) side and the mountain side as above-mentioned, The side surface of the upper part of the sea side is exposed to the sea side. The upper part on the mountain side protrudes to a predetermined height from the ground (natural ground).

  As shown in FIG. 6 and FIG. 7, the cap block 3 is placed on the upper end of the sheet pile row in this state so that the bottom plate 7 enters the recess on the sea side.

  At this time, before putting the cap block 3 on the sheet pile row, a plurality of positions at the upper end of the sheet pile row and facing the lower surface of the stay 6 of the cap block 3, for example, as shown by symbol a in FIG. Height adjustment fittings 10 are installed at four locations with respect to the cap block 3. Similarly, before the cap block 3 is covered, the positioning fitting 11 is installed on the positioning fitting nut 8.

  The height adjustment fitting 10 is configured as shown in the enlarged sectional view of FIG. 7 and the enlarged perspective view of FIG. 8, and the hook member 12 formed in a hook shape so as to be hooked on the upper end of the steel sheet pile 1, and this hook It comprises a nut member 12a fixed in parallel to the hooking member 12 on the back surface of the longer main body portion of the member 12, and an adjustment bolt 13 screwed into the nut member 12a. The top abutment member 14 that abuts the upper end of the steel sheet pile 1 is attached to the hook top portion inside the hook member 12, and the side abutment that abuts both side surfaces of the steel sheet pile 1 on the opposite inside of the main body and the hook portion. The contact members 15a and 15b are fixed to each other while being displaced in the vertical direction, and the steel sheet pile 1 is positioned between the opposing side surface contact members 15a and 15b. As shown in FIGS. 7 and 8, the side surface abutting members 15a and 15b provided by shifting the position in the vertical direction are arranged on the side surface abutting member 15a to which the nut member is fixed, as shown in FIGS. The position is shifted in the direction away from the top of the hooking member 12 with respect to the side contact member 15b.

  Each of the contact members 14, 15 a, 15 b is a round bar having a predetermined length, for example, 40 mm, and these are fixed to the hooking member 12 by welding in a right angle (horizontal) state. And when the top contact member 14 is at right angles to the hook member 12, when the hook member 12 is hooked on the upper end of the steel sheet pile 1, the top contact member 14 is Abutting on the top surface, the hooking member 12 is perpendicular to the top surface of the steel sheet pile 1. Therefore, the hook member 12 of the height adjusting bracket 10 is installed in a vertical shape by leveling the top surface of the steel sheet pile 1 where the height adjusting bracket 10 is installed.

  As shown in FIG. 7, the positioning bracket 11 includes an adjustment bolt 16 screwed to the positioning metal nut 8 inserted in the side walls 4 and 5 of the cage block 3 and a high nut 17 screwed to the adjustment bolt 16. The tip of the high nut 17 comes into contact with the side surface of the steel sheet pile 1.

As described above, the shade block 3 on which the positioning metal fitting 11 is installed is placed on the sheet pile on which the height adjusting metal fitting 10 is installed, with the stay 6 in contact with the height adjusting metal fitting 10. And the height position of the cap block 3 with respect to the sheet pile row at this time is adjusted by turning the bolt 13 of the height adjusting fitting 10. Further, the high nut 17 of the positioning metal 11 on the sea side and the mountain side of the cap block 3 is turned, and the tip of this is brought into contact with the side surface of the steel sheet pile 1 to position the cap block 3 in the width direction with respect to the steel sheet pile 1. Do. Of the side contact members 15a and 15b provided on the inner sides of the hook member 12 of the hook member 12 of the height adjustment fitting 10 at this time, the side contact member 15a on the side to which the nut member is fixed, By abutting the side surface of the steel sheet pile 1 below the other side surface abutting member 15b, the force acting on the top surface of the adjustment bolt 13 of the height adjusting fitting 10 is not deviated from the steel sheet pile 1. Can be supported.

  At this time, since the inner width of the cap block 3 is larger than the depth of the hat-shaped portion of the steel sheet pile 1, the sheet pile row is positioned in the middle in the width direction of the device block 3, thereby the sea side of the sheet pile row. A gap 18 is formed between the side surface and the tip of the bottom plate 7 of the cap block 3.

  As shown in FIG. 6, the gap 18 is parallel in a zigzag shape along the end side 7 a of each bottom plate 7 of the cage block 3 and the side surface 4 a connecting the end side 7 a. As shown in FIG. 7, the gap 18 has a wedge shape due to the edge 7 a of the bottom plate 7 and the inclined surface of the side surface 4 a connecting the end 7 a and the vertical surface that is the side surface of the steel sheet pile 1. A gap material 19 is inserted into the gap 18, and the gap 18 is closed by the gap material 19.

  The cross-sectional shape of the gap member 19 is as shown in FIG. 7 and FIG. 9, and one side surface thereof is a slope having the same angle as the slope of the edge of the bottom plate 7, and the other side surface is vertical, that is, both sides The surface is substantially the same as the shape of the gap 18 and has a wedge shape whose height is higher than the thickness of the bottom plate 7. The planar shape thereof is the same as the planar shape of the gap 18 shown in FIG.

  The length of the gap material 19 is a length that is easy to handle in the field, for example, three steel sheet piles 1. The gap material 19 is formed of foamed polystyrene (foamed polystyrene). The constituent material of the gap material 19 is not limited to foamed polystyrene, and may be a rubber material. In the case of the expanded polystyrene, since it can be easily folded, the length can be easily adjusted at the work site.

  The interval of the gap 18 is difficult to be constant in the sheet pile revetment method and is different at each construction site. However, since the cross-sectional shape of the gap member 19 is wedge-shaped, the gap 18 is inserted by inserting the gap member 19. Regardless of the change, the gap 18 can be tightly sealed.

  As described above, the crest block 3 is covered with the crest block 3 and the gap 18 between the inner surface of the bottom plate 7 portion of the crest block 3 and the side surface of the steel sheet pile 1 is closed by the gap material 19. The concrete is driven into the space on the bottom plate 7 side from above. The ready-mixed concrete at this time does not leak from the gap 18 and fills the space closed by the bottom plate 7 and the gap material 19.

  The ready-mixed concrete at this time may be filled not only in the space of the bottom plate 7 but also in the space on the mountain side of the sheet pile row. The bottom side of this space is closed to a natural ground, so there is no leakage of ready-mixed concrete. And by pouring ready-mixed concrete into the space on both sides in this way, ready-mixed concrete can be filled up to the upper end of the cap block 3 and the upper surface of the cap block 3 can be flattened.

  Moreover, although the sheet pile in this embodiment was shown by the example using the hat-shaped steel sheet pile 1, you may use a U-shaped steel sheet pile and a linear steel sheet pile. In the case of a straight sheet pile, the sheet pile array is in a straight line, so that the bottom plate 7 provided in the cap block 3 also has a parallel plate shape. The gap material 19 is also a straight one. Moreover, what was comprised with plastic other than the steel sheet pile comprised with steel is also used for a sheet pile.

  The crest block 3 is continuously covered in the longitudinal direction along the sheet pile row, and the adjacent crest blocks 3 are connected by a connection fitting 20 fixed by a bolt fastened to a connection fitting nut 9.

It is a top view which shows the sheet pile row | line | column using a hat-shaped steel sheet pile. It is a top view which shows the cap block which covers the sheet pile row | line | column shown in FIG. FIG. 3 is a side view of FIG. 2. It is AA arrow sectional drawing of FIG. It is a BB arrow sectional view of Drawing 3. It is a partially broken top view which shows the state which put the cap block on the sheet pile row. It is CC sectional view taken on the line of FIG. It is a perspective view which shows a height adjustment metal fitting. It is a perspective view which shows a clearance gap material.

  DESCRIPTION OF SYMBOLS 1 ... Hat-shaped steel sheet pile, 1a, 1b ... Side part, 2a, 2b ... Engagement part, 3 ... Caps block, 4, 5 ... Side wall, 4a ... Side surface of inner surface lower end part, 6 ... Stay, 7 ... Bottom plate, Reference numeral 7a: end side, 8: nut for positioning bracket, 9: nut for connecting bracket, 10: height adjusting bracket, 11: positioning bracket, 12: hook member, 12a: nut member, 13, 16 ... adjustment bolt, 14 ... Top contact member, 15a, 15b ... side contact member, 17 ... high nut, 18 ... gap, 19 ... gap material, 20 ... connecting bracket.

Claims (1)

At the upper end of the sheet pile array, in which the sheet piles are driven in a row, a cap rest block provided with a bottom plate whose tip side is in the shape of the side surface of the sheet pile array on the inner side of one side wall is installed at the upper end of the sheet pile array. In the sheet pile wall revetment formed by placing concrete in the space between one side wall of this cap rest block and the bottom plate and the side face of the sheet pile row, in contact with the height adjustment fitting ,
The edge of the bottom plate of the cap block is an inclined surface whose upper side recedes with respect to the tip of the bottom surface of the bottom plate, and the length between the inner surface of the side wall on the side where the bottom plate of the cap block is provided and the side surface of the sheet pile row Form a wedge-shaped gap that is zigzag in the direction and has a wider cross-sectional shape,
Insert a gap material with a wedge-shaped cross section into this gap from above ,
Concrete is driven from above into the space where the gap is sealed with a gap material ,
The height adjusting bracket includes a hook member having an upper end hook-like, a nut member fixed to the hook member in parallel with the hook member, and a bolt screwed to the nut member. A rod-like top contact member is provided at a right angle with the hook member on the inner top portion of the hook-like portion, and a side contact member that contacts one side surface of the sheet pile on one side surface of the hook-like portion of the hook member, Further, the side contact member that contacts the other side surface of the sheet pile is disposed on the other side surface, and the side contact member that is positioned on the side where the nut member is fixed is hooked to the side surface contact member that is positioned on the other side. It is structured to be shifted up and down in the direction away from the top,
The top contact member provided on the inner top of the hook-shaped portion of the hook member of the height adjusting bracket is brought into contact with the upper end of the sheet pile row, and the side contact member provided on the inner side of the hook member is applied to the side surface of the sheet pile. Installed by hooking it so that the upper end of the bolt is in contact with the lower surface of the stay on the cap block
Yaita wall revetment characterized by that.

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