JP2001207424A - Rising method of wave-absorbing type structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise a quaywall, a breakwater, a revetment or the like, maintaining a wave-absorbing function. SOLUTION: Top slabs 6 are removed from a structure body 7, such as the quaywall, the breakwater, the revetment or the like. Raising sections 15 are extended to the separation surfaces 8 of the top slabs 6. The raised top slabs 6a are returned to the structure body 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for raising a wave-breaking structure, such as a quay, a breakwater or a seawall, having a large number of wave-breaking openings in front.

[0002]

2. Description of the Related Art Conventionally, when a gravity type quay made of reinforced concrete is settled, concrete is poured on the quay and the upper concrete is raised to the height of the planned top end. Construction methods such as replenishing backfill soil are being adopted.

[0003]

However, in the case of a wave-extinguishing quay in which a large number of slits are provided at regular intervals in front of a hollow quay main body, it is necessary to maintain the wave-extinguishing function. The height of the top of the basin, as well as the top of the water chamber, must also be maintained at the planned height.

[0004] Therefore, the conventional raising method in which concrete is cast on the quay and the upper concrete is simply raised to the height of the planned top cannot be applied.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to increase the height of structures such as quays, breakwaters and seawalls while maintaining the wave-damping function. It is to provide a method.

[0006]

In order to solve the above-mentioned problems, a method for raising a wave-breaking structure according to the present invention includes removing a top plate from a building body when raising a wave-breaking structure,
It is characterized in that a raised portion is added to the marginal surface of the top plate, and thereafter, the raised top plate is reinstalled on the building body.

[0007] As described above, the raised portion is added to the beveled surface of the top plate removed from the building body, and then the raised top plate is re-installed on the building body. , Revetments and other structures can be raised.

At this time, if the raised portion is formed by casting concrete, the raised portion can be easily formed. However, it is also conceivable to apply a concrete block previously formed into a predetermined shape to the raised portion. .

Further, in order to maintain the wave-absorbing function, the raised portion on the front surface of the top plate has the same width as the wall width between the wave-absorbing openings.

Further, by dividing the top plate and the superstructure installed on the top plate into arbitrary spans, the size of each of the top plate and the superstructure can be reduced. Then, the raising work can be carried out sequentially. Also, no large heavy equipment is required for removing and installing the superstructure and top plate. In addition, since each top plate can be raised to an arbitrary height, it is possible to cope with uneven settlement.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a wave-dissipating quay is taken as an example.

As shown in FIG. 1, first, a wave-breaking quay 1
(Hereinafter referred to as quay) is measured. That is, the upper surface 2 of the superstructure block 2 on the sunk quay 1
The height δ from “a” to the planned top 3 is measured.

After measuring the settlement amount, the quay 1 is raised by the settlement amount δ. First, as shown in FIG. 2, the backfill soil 5 on the back side of the quay 1 is removed. The backfill soil 5 is removed until the top plate 6 of the quay 1 is completely exposed.

After removing the backfill soil, as shown in FIG.
The superstructure block 2 is removed using a crane (not shown). In the drawing, reference numeral 4 indicates a wire rope of the crane.

After removing the superstructure block, the top plate 6 is removed from the quay main body 7 by a crane (not shown) as shown in FIG. The top plate 6 and the quay main body 7 are independently formed in advance, and the connection between them is mainly performed by male and female connecting members.

That is, as shown in FIG. 9, a male guide member 9 made of a steel pipe is vertically provided on the edge cutting surface 8 of the top plate 6, and usually, a front male guide member 9a is provided at the front.
Is inserted into a steel pipe 11 buried in a slit wall 10 on the front of the quay main body, and a male guide member 9b on the rear side is a vertical beam 1 made of a square steel pipe supporting a rear wall 12 of the quay main body 7.
3 is inserted.

Next, as shown in FIG. 5, after the top plate 6 removed from the quay main body 7 is placed on the base 14 near the work site on the back, the top plate 6 is placed on each edge cut surface 8 of the top plate 6. Each concrete is cast to form the raised portion 15.

At this time, the width of the front concrete is set equal to the width of the slit wall 10. The rear concrete casting width is the same as the width of the top slab, and the top slabs located at the left and right ends of the quay 1 also cast concrete on the side wall portions. The concrete placement height is the same as the quay subsidence amount δ already described.

After the poured concrete is solidified, a new beveled surface, that is, a raised portion 15 is prepared to adjust the unevenness of the beveled surface and prevent seawater from entering the beveled portion and outflow of earth and sand. A plate-like sealing material (rubber material) (not shown) is attached to the rim surface 8a.

Thereafter, as shown in FIG. 6, the raised slab 6a is returned to the quay main body 7 using a crane (not shown). At this time, the male guide material 9a on the front surface of the top plate is inserted into the steel pipe 11 embedded in the slit wall 10, and the male guide material 9b on the rear surface of the top plate is vertically supported by the rear wall surface 12 of the quay body 7. Insert into beam 13.

Next, as shown in FIG. 7, the superstructure block 2 is returned onto the raised top plate 6a using a crane (not shown). Thereafter, as shown in FIG. 8, the backfill soil 5 put on the back side of the raised quay 1a is leveled and completed.

As shown in FIG. 9, the quay 1 has a large number of vertical slits 16 provided at regular intervals in front of a hollow quay main body 7. The slits 16 are respectively provided in the quay main body 7.
Is connected to the water play room 17 inside, and some of the waves
Waves are extinguished by passing through 6.

In this example, the edge 8 between the quay main body 7 and the top plate 6 is set as the upper end of the slit 16, but it may be installed below the upper end of the slit 16 if desired.

Further, when the upper work block 2 and the top plate 6 are divided at each slit 16, the size of each of the upper work block 2 and the top plate 6 can be reduced. Meanwhile, the raising work can be carried out sequentially.

Further, when removing and installing the superstructure block 2 and the top plate 6, a large heavy machine is not required. Also, since each top plate can be raised to an arbitrary height,
It can respond to uneven settlement.

However, the division span length of the upper work block 2 and the top plate 6 can be set to any length as desired. Further, the guide member can be added by welding if necessary.

On the other hand, when the raising work is completed, the earth pressure of the buried sediment becomes larger than that at the beginning of the installation, but the weight of the embankment does not increase so much. Alternatively, it is necessary to ensure stability after subsidence, such as by placing concrete or installing concrete blocks in the retarding chamber at the same time as raising the floor.

If it is not possible to secure the stability of the top plate and the weight of the top slab against the lifting pressure acting on the top slab during the waves, it is necessary to take safety measures such as fixing the top slab to the quay body. is there. However, when the top slab is fixed to the quay, the superstructure can be omitted.

The raised portion can be formed by casting concrete, or can use a concrete block formed in advance.

Also, the male guide members 9a, 9b of the top plate 6,
The steel pipe 11 of the slit wall 10 and the vertical beam 13 of the back wall 12 of the quay main body may be cylindrical or prismatic. The vertical beam 13 may be included in the rear wall surface 12 of the quay main body 7.

The present method can be widely applied to breakwaters, seawalls, and the like in addition to the quays described above.

[0032]

As described above, according to the present invention, when raising a wave-breaking structure, the top plate is removed from the main body of the structure, a raised portion is added to the marginal surface of the top plate, and thereafter, the raised top plate is raised. Is re-installed on the building itself, so it is possible to raise structures such as quays, breakwaters and seawalls while maintaining the wave-dissipating function.

At this time, if the raised portion is formed by casting concrete, the raised portion can be easily formed. However, a concrete block previously formed into a predetermined shape can be applied to the raised portion. .

Further, by dividing the top plate and the superstructure installed on the top plate into arbitrary span lengths, the size of each of the top plate and the superstructure can be reduced, so that the quay wall, breakwater, seawall, etc. While using such a structure,
The raising work can be carried out one by one.

In addition, a large heavy machine is not required for removing and installing the superstructure and the top plate. In addition, since each top plate can be raised to an arbitrary height, it is possible to cope with uneven settlement.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a settlement amount measuring step.

FIG. 2 is an explanatory view of a backfill soil removal process.

FIG. 3 is an explanatory view of a superstructure removal process.

FIG. 4 is an explanatory view of a top plate removing step.

FIG. 5 is an explanatory view of a step of raising concrete.

FIG. 6 is an explanatory view of a top plate setting process.

FIG. 7 is an explanatory view of a superstructure installation process.

FIG. 8 is an explanatory diagram of a backfilling earth and sand charging step.

FIG. 9 is a perspective view including a partial cross section of the quay wall during the raising work.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wave-dissipating type structure 6 Top plate 6a Raised top plate 7 Construction body 8 Edge cut surface of top plate 15 Raised portion

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tatsuhiko Sugimoto 5-6-4 Tsukiji, Chuo-ku, Tokyo Mitsui Engineering & Shipbuilding Co., Ltd. F-term (reference) 2D018 BA11

Claims (5)

[Claims] When raising a wave-damping type construction, it is necessary to remove the top plate from the structure body, add a raised portion to the cut surface of the top plate, and then re-install the raised top plate on the structure body. A method for raising a wave-dissipating structure. 2. The method for raising a wave-breaking type structure according to claim 1, wherein the raising portion is formed by casting concrete. 3. The method for raising a wave breaking type structure according to claim 1, wherein a concrete block formed in a predetermined shape in advance is applied to the raising portion. 4. The method for raising a wave-damping type structure according to claim 1, wherein the raised portion on the front surface of the top plate has the same width as the wall width between the wave-damping openings. 5. The top plate and a superstructure installed on the top plate are divided into arbitrary spans.
A method for raising the wave-damping type construction according to the above description.