JP2860396B2 - Water sheet pile wall structure with a slit for wave dissipation on top - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet pile wall structure having a wave-breaking slit in an upper part which is newly constructed on a water area side such as an existing quay wall or seawall.

[0002]

2. Description of the Related Art Conventionally, as a structure installed in a water area such as a quay wall or a seawall, a water area structure using a concrete caisson, a steel sheet pile, or the like is known.

[0003]

Among the above-mentioned conventional water body structures, in the case of a structure in which the water body side is substantially upright and forms an opaque wall, the reflected wave is large, so that the water body in front of the structure has a large reflection wave. The calmness cannot be secured. For this reason,
Measures against reflected waves were taken, for example, by installing a new wave-dissipating block in front of these water structures. In addition, in the case of the above-mentioned conventional water body structure, corrosion of steel materials and deterioration of concrete progress due to long-term use, causing a problem in safety of facilities. For this reason, the water body structure was newly created. Furthermore, due to the increase in the size of ships such as cargo ships, there has been a problem that the conventional quay lacks water depth. For this reason, the quay was constructed at a deeper place or the landfill normal was changed, and a new quay was constructed at a deeper place in front of the existing quay. As described above, measures to prevent reflected waves from existing water structures, measures to prevent deterioration,
In contrast to the water depth shortage countermeasures, the measures that have been adopted in the past have increased construction costs, lengthened the construction period, required a long time to change the landfill normal line, delayed the start of construction, and made water body structures dangerous. There is a problem that is placed in a state.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a reflected wave from a water body structure is reduced to secure the calmness of a water body in front of the water body, the construction cost can be reduced, the construction period is shortened, and a procedure for changing a landfill normal is further reduced. Is unnecessary, and construction can be started immediately.
An object of the present invention is to provide a water area sheet pile wall structure having a wave-breaking slit on an upper portion that can ensure safety of the water area structure. In order to advantageously solve the above-described problem, in a water area sheet pile wall structure having a wave-breaking slit in the upper part of the present invention, the sheet pile body 2 and the left and right sides of the sheet pile main body 2 are located at a position away from the water area structure 1 in front. A number of submerged ground driving members 4 including the provided joints 3 are driven into the submerged ground 5 in a state where the adjacent joints 3 are engaged with each other to form a water area sheet pile wall structure 6, and the water area sheet pile is formed. In the front part of the wall structure 6, a number of columnar members 7 are placed on the underwater ground 5 at intervals in the left-right direction, and the upper part of the diagonal member 8 extending obliquely downward from the upper part of the sheet pile body 2 toward the front. And the sheet pile body 2
And the upper part of the columnar member 7 are connected by a connecting member 9, the upper part of the joint 3 is lower than the upper part of the sheet pile body 2, and the slit 10 is provided between the upper parts of the adjacent sheet pile bodies 2.
Is provided.

[0005]

1 to 6 show a first embodiment of the present invention, in which a large number of concrete boxes 13 are provided on a rubble layer 14 laid on a submarine ground 5 at a position where a seawall or quay is to be constructed. The concrete box 13 is filled with a filler 15 such as gravel and earth and sand.
In addition, a concrete lid 16 is placed on the upper part of the concrete box 13 to constitute the water body structure 1.

A large number of submarine ground driving members 4 composed of a steel pipe sheet pile constituted by a sheet pile main body 2 and joints 3 provided on both left and right sides thereof, at a position away from the water structure 1 in the water area. Each of the submarine ground driving members 4 is placed on the submarine ground 5 in a state where the joints 3 of the adjacent submarine ground driving members 4 are engaged with each other so as to be arranged substantially parallel to the structure 1 and extend. A water area sheet pile wall structure 6 is configured.

At the front of the water area sheet pile wall structure 6,
A large number of columnar members 7 made of steel pipes are arranged so as to be substantially parallel to the water area sheet pile wall structure 6, and each columnar member 7 is cast on the underwater ground 5, and is provided at the lower end of the diagonal member 8 made of steel pipes. The steel vertical cylinder 11 is fixed, an annular bottom plate (not shown) is fixed to the lower end of the vertical cylinder 11, and the vertical cylinder 11 is fitted to the outside of the middle part of the columnar member 7. The upper end of the diagonal member 8 and the upper end of the sheet pile body 2 are fixed to each other by welding via a steel connection fitting 17, and
A space-curable filler 18 such as mortar is filled between the column member 7 and the outer surface of the intermediate portion of the columnar member 7.

A steel connecting member 9 extending in the front-rear direction is disposed over the upper end of the sheet pile main body 2, the upper end of the columnar member 7, and the upper end of the diagonal member 8, and the connecting member 9 is connected to the sheet pile main body 2 and the columnar member. The member 7 and the diagonal member 8 are fixed to the member 7 and the diagonal member 8 by appropriate means such as welding or bolting. Further, the connecting member 9, the upper end of the sheet pile body 2, the upper end of the columnar member 7, and the upper end of the diagonal member 8 It is embedded in a concrete member 19 such as a beam, floor slab concrete or coated concrete.

The upper end of the joint 3 is disposed at a lower level than the upper end of the sheet pile main body 2 and the lower surface of the concrete member 19, and a slit 10 is provided between the upper parts of the adjacent sheet pile main bodies 2. A filling material 12 is filled between the water body structure 1 and the water body sheet pile wall structure 6, and a concrete scour prevention work 20 is provided on an upper surface of the filler material 12. The upper surface is arranged at the same level as the lower end of the slit 10 or at a lower level. Further, a concrete crossover plate 2 extends over a front portion of the water body structure 1 and a rear portion of the concrete member 19.
1 is erected.

FIG. 7 shows a second embodiment of the present invention. The underwater ground 5 on which the columnar member 7 is cast is dredged.
An underground subsurface ground 22 is provided, and a slope layer 23 is provided between the water area sheet pile wall structure 6 and the row of the columnar members 7, but other configurations are the same as those of the first embodiment. is there.

FIG. 8 shows a third embodiment of the present invention, in which an upper part of a water body structure 1 composed of a steel sheet pile wall and an upper part of a large number of piles 24 driven into the ground behind the same. ,
The lower part of the diagonal member (slanting pile) 8 is connected to the hard ground 26 by a tie rod 25, and the upper part of the sheet pile main body 2, the upper part of the columnar member 7, and the upper part of the diagonal member 8 are concrete members 19 The bridge 21 is bridged between the concrete member 27 and the concrete member 19, which are connected via the water member 1.
The underfloor ground 5 on which the columnar member 7 is cast is dredged to provide a digging underwater ground 22, and further, a slope layer 23 is provided between the water area sheet pile wall structure 6 and the row of the columnar members 7. The configuration of the sheet pile wall structure 6 and the method of providing the filler 12 and the scour prevention work 20 are the same as those in the first embodiment.

As one means for adjusting the reflected wave height reduction effect, there is a method of changing the opening ratio by adjusting the opening width of the slit 10 between the upper portions of the adjacent sheet pile main bodies 2. Therefore, when it is desired to reduce the opening ratio, as shown in FIGS. 11 to 15, a projection formed by welding an angle steel, a grooved steel, a steel plate with reinforcing ribs, or the like to a predetermined upper portion of the sheet pile body 2 by welding. 31 may be provided. The shape of the projection 31 may be an arbitrary shape other than that shown. The projections 31 may be provided continuously in a predetermined range above the sheet pile main body 2, or a plurality of projections 31 may be provided intermittently as shown in FIG.

As shown in FIGS. 16 to 19, the upper predetermined area of the sheet pile main body 2 may be covered with a cement-based hardened coating 32 instead of the projection 31. FIG. In this case, the sheet pile main body 2 can be protected from corrosion as an additional effect.

As the formwork for lining with the cement-based hardened body 32, there are wood and steel, which are usually removed after the hardening of the cement-based hardened body 32, but the formwork is made of FRP, GRC or fume. Fig. 19
As shown in FIG. In addition, a reinforcing material such as a reinforcing bar may be disposed in the cement-based hardened covering 32 as necessary, and a slip stopper such as a stud dowel may be provided in the sheet pile body 2 as necessary.

In each embodiment, the waves traveling from the water area to the land area pass through a number of slits 10 for wave canceling in the upper part of the water area sheet pile wall structure 6, and the waves traveling in the upper part of the water area sheet pile wall structure 6 come into contact with the upper part of the water area sheet pile wall structure 6. Recreational chamber 2 provided between the water body structure 1 and the upper part
Enter 8.

As the filler 12 to be filled between the water area structure 1 and the water area sheet pile wall structure 6, for example, a mixture of stone and earth and sand, concrete, a mixture of stone and earth and sand, and concrete, or another material is used. use.

A large number of slip-preventing projections 29 are fixed around the inner surface of the vertical cylindrical body 11, and slip-preventing projections 30 are also fixed to portions of the columnar member 7 located in the vertical cylindrical body 11. I have. As the slip prevention projections 29 and 30,
For example, as shown in FIGS. 9 and 10, a steel rod is provided along the outer circumferential surface of the columnar member 7 in the circumferential direction, and the annular slip-off preventing projection 30 fixed by welding or the inner circumferential surface of the vertical cylindrical body 11 is An annular slippage preventing projection 29 fixed by welding along a circumferential direction with a rod may be used. Note that the protrusion 2 for preventing slippage
As the projections 9 and 30, any other projections may be used as long as the projections can exhibit the slip-preventing function. Instead of fixing the slip prevention projections 29 and 30 to the steel pipe, a steel pipe with an inner projection or an outer projection may be used.

The vertical cylindrical body 11 is provided inside the columnar member 7.
May be filled with a time-curable filler such as concrete. In this case, the vertical cylinder 11
A steel pipe with inner and outer projections may be used for the columnar member 7 at the position where is located. As the time-curable filler 18 to be filled between the vertical cylindrical body 11 and the columnar member 7, any material can be used as long as it hardens with time and exhibits a predetermined strength. Good. The time-hardenable filler 18 may be mixed with an inseparable admixture in water.
A rust inhibitor, a fluidizing agent, a swelling agent, a shrinkage reducing agent, a polymer, a resin, and the like may be mixed as necessary.

The oblique material 8 may be filled with a time-curable filler. In this case, a projection for preventing slippage may be provided on the inner surface of the diagonal member 8, or a steel pipe with an inner surface projection may be used as the diagonal member 8. Conversely, a lubricating layer may be provided on the inner surface of the diagonal steel pipe so as to exert the restraining effect of the diagonal steel pipe. As a material for the lubricating layer, a vinyl acetate-based or urethane-based water-absorbing and swellable water-stopping material used as a grease, a release material, or a water-stopping material for a steel sheet pile joint [trade name: Pile Rock (Nippon Chemical Paint) Co., Ltd.) and Chemigard (Sanyo Chemical Industry Co., Ltd.)].

The water area sheet pile wall structure 6 may be inclined in the front-rear direction. The upper part of the water area sheet pile wall structure 6 is inclined rearward, that is, in a direction away from the columnar member 7,
When the filler 12 is filled behind the water area sheet pile wall structure 6, the effect of reducing the active earth pressure acting on the water area sheet pile wall structure 6 is obtained. Water area sheet pile wall structure 6
Is inclined in the forward direction, that is, in the direction approaching the columnar member 7, and the filler 12 is filled behind the water area sheet pile wall structure 6, the pulling force acting on the water area sheet pile wall structure 6 is reduced. In addition to the reduction, the effect of increasing the lateral ground reaction force is obtained.

The columnar member 7 may be inclined. The upper part of the columnar member 7 is located rearward, that is, in the water area sheet pile wall structure 6.
When it is inclined in the direction approaching the horizontal direction, the horizontal displacement of the water area sheet pile wall structure 6 can be reduced. When the columnar member 7 is inclined forward, that is, in a direction away from the water area sheet pile wall structure 6, the lateral ground reaction force increases.

The connecting member 9 may be made of reinforced concrete or steel reinforced concrete. Also diagonal 8
And the upper end of the sheet pile body 2 may be integrated by a mechanical means such as welding or bolting via a steel material such as a steel plate or a shaped steel.

In the water retarding chamber 28, a wave-absorbing material such as a wave-absorbing block may be installed as necessary.

[0024]

According to the present invention, at the position away from the water body structure 1 in a forward direction, a large number of submarine ground driving members 4 comprising the sheet pile main body 2 and the joints 3 provided on both left and right sides thereof.
Is formed on the underwater ground 5 in a state where the adjacent joints 3 are engaged with each other to form an aquatic sheet pile wall structure 6. At a front portion of the aquatic sheet pile wall structure 6, a large number of columnar members 7 are The upper part of the diagonal member 8 which is poured into the underwater ground 5 at intervals in the direction and extends obliquely downward from the upper part of the sheet pile main body 2 toward the front, the upper part of the sheet pile main body 2, and the upper part of the columnar member 7 Are connected by a connecting member 9, the upper part of the joint 3 is made lower than the upper part of the sheet pile main body 2, and the slit 10 is provided between the upper parts of the adjacent sheet pile main bodies 2, so that it is closer to the land side than the water area side. When the wave enters, when the wave passes through a number of slits 10 for wave-dissipation in the water sheet pile structure 6, a phenomenon of contraction / expansion or vortex generation occurs, and the energy of the wave decreases. And the upper part of the water body structure 1 and the upper part of the water body sheet pile wall structure 6 The wave energy is also reduced by the phase difference effect of the water retarding chamber 28 provided therebetween, so that the reflected wave height is reduced and the calmness of the water area can be improved by the effect of reducing the wave energy. At the same time, the lifting pressure can be reduced. Furthermore, since the water area sheet pile wall structure 6 is newly constructed in front of the existing water area structure 1 without removing the existing water area structure 1, the construction cost can be reduced and the construction period can be shortened, which is economical. Further, since a large number of slits 10 for wave-breaking are provided in the upper part of the water sheet pile structure 6, at a high water level such as high tide, the water surface reaches the impermeable wall of the existing structure. No change procedure is required, and new construction can be started immediately, so that the unstable period of the water body structure 1 can be shortened. Furthermore, the filling material 1 is provided at a portion deeper than the water play chamber 28 on the back side of the land area side of the water area sheet pile wall structure 6.
By filling 2, the corrosion rate of the water area sheet pile wall structure 6 on the side in contact with the filler 12 can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a water sheet pile wall structure having a wave-breaking slit in an upper part according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view showing a part of FIG. 1 in an enlarged manner. .

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged sectional view taken along line BB of FIG. 2;

FIG. 5 is an enlarged sectional view taken along line CC of FIG. 1;

FIG. 6 is a cross-sectional plan view showing a fixing portion of the vertical cylinder to the columnar member.

FIG. 7 is a vertical cross-sectional side view showing a water sheet pile wall structure having a wave breaking slit in an upper part according to a second embodiment of the present invention.

FIG. 8 is a vertical sectional side view showing a watershed sheet pile wall structure having a wave breaking slit in an upper part according to a third embodiment of the present invention.

FIG. 9 is a cross-sectional plan view showing another example of a fixing portion of the vertical cylindrical body to the columnar member.

FIG. 10 is a sectional view taken along line DD of FIG. 9;

FIG. 11 is a longitudinal sectional side view showing, in an enlarged manner, a part of a water area sheet pile wall structure having a wave-dissipating slit on an upper portion provided with a protrusion.

FIG. 12 is a sectional view taken along line EE of FIG. 11;

FIG. 13 is a vertical cross-sectional side view showing a part of a watershed sheet pile wall structure having a wave-breaking slit on an upper portion provided with a plurality of protrusions.

FIG. 14 is a cross-sectional plan view showing a state in which another example of a projection is attached to a sheet pile main body.

FIG. 15 is a cross-sectional plan view showing a state where still another example of a projection is attached to a sheet pile main body.

FIG. 16 is a longitudinal sectional side view showing, in an enlarged manner, a part of a water area sheet pile wall structure having a wave breaking slit on an upper portion provided with a cement-based hardened coating.

FIG. 17 is a sectional view taken along line FF of FIG. 16;

FIG. 18 is a cross-sectional plan view showing a state in which another example of a cement-based hardened coating is provided on a sheet pile main body.

FIG. 19 is a cross-sectional plan view showing a state in which a hardened cementitious body using a buried formwork is provided on a sheet pile main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water area structure 2 Sheet pile main body 3 Joint 4 Underwater ground driving member 5 Water bottom ground 6 Water area sheet pile wall structure 7 Column member 8 Diagonal material 9 Connecting member 10 Slit 11 Vertical cylinder 12 Filling material 13 Concrete box 14 Rubbed stone layer 15 Filling Material 16 Concrete Lid 17 Connecting Metal 18 Temporary Curing Filler 19 Concrete Member 20 Scouring Prevention Work 21 Crossing Plate 22 Drilling Bottom Ground 23 Slope Layer 24 Pile 25 Tie Rod 26 Hard Ground 27 Concrete Member 28 Water Reservoir 29 Slip Stop Projection 30 Slip-prevention projection 31 Projection 32 Cement-based hardened covering 33 Embedded formwork

Continuation of the front page (56) References JP-A-4-228714 (JP, A) JP-A-4-350207 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02B 3 / 04-3/14

Claims (5)

(57) [Claims] At a position away from the water body structure in a forward direction, a number of underwater ground driving members composed of a sheet pile main body and joints provided on both left and right sides thereof are connected to adjacent joints.
Are put into the underwater ground 5 in a state in which they are engaged with each other to form an aquatic sheet pile wall structure 6, and at the front of the aquatic sheet pile wall structure 6, a large number of columnar members 7 are spaced apart in the left-right direction. The upper part of the diagonal member 8 which is cast on the underwater ground 5 and extends obliquely downward from the upper part of the sheet pile main body 2 toward the front, the upper part of the sheet pile main body 2 and the upper part of the columnar member 7 are connected to a connecting member 9. The upper part of the joint 3 is made lower than the upper part of the sheet pile body 2 so that the slit 1 is formed between the upper parts of the adjacent sheet pile bodies 2.
A water sheet pile wall structure having a wave-dissipating slit at the top where 0 is provided. 2. A water sheet pile wall structure having a wave-breaking slit in an upper part thereof, wherein the lower part of the diagonal member 8 is driven into the underwater ground 5. 3. A vertical tubular body 11 fixed to a lower portion of a diagonal member 8,
2. The fixing device according to claim 1, wherein the fixing member is fitted outside the intermediate portion of the columnar member.
Water sheet pile wall structure with a wave-breaking slit in the upper part of the wall. 4. A water area sheet pile wall structure having a wave-breaking slit in an upper part thereof according to claim 1, wherein the underwater ground driving member 4 is a steel pipe sheet pile. 5. A filler 12 at a lower level than the slit 10 between the water body structure 1 and the water body sheet pile wall structure 6.
A water sheet pile wall structure having a wave-breaking slit in an upper part of Claim 1 filled with water.