JPS62273317A - Setting of working caisson for steel sheet pile quaywall - Google Patents

Abstract

PURPOSE:To exactly set a working caisson even when the intervals of trenches are unequal by a method in which joint edges facing the steel sheet pile walls of the working caisson are pressure-welded to the outer face of water-stop packing pieces and also to the steel sheet piles by the use of the water-stop packing. CONSTITUTION:Water-stop packing pieces 18 are designed to be fitted into places at a level corresponding to the bottom plate 23 of a working caisson 11, and a rope 24 is beforehand adjusted to have a given height. Bar-like packings 26 bonded to both-side walls 213 of the caisson 11 and also to the front edge of the bottom plate 23, and the caission 11 is sunk to a given depth by adjusting its buoyancy and pressed on the projected end face of the packing pieces 18. The water in the caisson 11 is discharged to form a working space where the quaywall side is exposed to the open air in the working caisson 11. The water-stopping work in the working caisson can thus be attained without any trouble even when the intervals of trenches of the steel sheet pile quaywall are unequal.

Description

[Detailed description of the invention] 3. Detailed explanation of the invention i゛""'! ”'f'!'ft:l
”-, λ: 1 (Field of Application of the Invention) This invention can be installed on the quay wall near the tidal zone to prevent corrosion from occurring in the head, splash zone, and tidal zone of a steel sheet pile quay. This invention relates to a method for installing a work box for a steel sheet pile quay for carrying out work such as investigation, repair, inspection and corrosion prevention by draining water and drying the quay wall near the tidal zone.

(Prior art) Conventionally, when this type of work box is installed on a steel sheet pile berth, it is necessary to stop the water from leaking between the work box and the steel sheet pile berth when the water inside is drained. However, as shown in FIG. 6, the steel sheet pile piece 11 has vertical grooves 2.2 lined up at regular intervals on its surface, so it is necessary to open the grooves tM2.2.

Therefore, conventionally, as shown in FIG. 7, a projecting piece 4a is provided on the front edge of the bottom plate 4 of the work box 3 to fit into each of the grooves 2, 2.

4a,... are provided integrally, and this is used as a seal 5 for water stop
The work box 3 is fitted into the groove 2.2 through the groove 2.2 so that the work box 3 is attached to the steel sheet pile piece W11.

(Problems to be Solved by the Invention) In the conventional method of mounting work boxes as described above, the steel sheet pile quay 1 has a U-shaped steel sheet pile 6.6 as shown in FIG. 6(A).・・・
・A structure in which the 2-type steel sheet piles 7, 7. ... are connected in the width direction, the mutual play between the joints between the sheet piles causes an error, and the adjacent grooves 2.2. ...There will be variations in the spacing between them.

On the other hand, since the intervals between the protruding pieces 4a, 4a, .
・When mounting the work box 3 across the groove 2
,2. The protruding pieces 4a, 4a, . . . may no longer correspond to each other, making it impossible to mount them.

In view of these conventional problems, the present invention aims to provide a work box mounting method that does not make mounting impossible even if there are variations in the groove spacing of the steel arrow quay wall.

(Means for Solving the Problems) In order to achieve the above-mentioned objects, the present invention uses a steel sheet pile quay wall in which a large number of steel sheet piles are connected in the width direction to form a large number of vertical grooves on the outer surface. In the method for installing a work box for a steel sheet pile quay, in which a work box for forming a dry space by fitting the outer surface of the steel sheet pile quay is attached to a quay wall that is earth-retained via a waterproof packing, each concavity of the steel sheet pile wall is attached. A water-stop packing piece for filling the groove, which is made of a stretchable elastic material and is separate from the work box, is inserted into the groove at a position where the joint edges of the work box face each other, and then the work box is closed. The joint edge facing the steel sheet pile wall surface is brought into pressure contact with the outer surface of the water stop packing piece and the steel sheet pile wall surface via an appropriate water stop packing piece.

(Function) This method of installing the work box involves inserting a water-stop packing piece for filling the groove into the groove of the steel sheet pile quay, so that the joint edge of the work box can be straight, and Work boxes can be attached regardless of the spacing of the grooves.

(Example) Next, an example of implementation of the present invention will be described with reference to FIGS. 1 to 5.

In the figure, reference numeral 11 is a work box for steel sheet pile walls used in the present invention.

This work box 11 is equipped with a box 12 whose top surface and the side to be installed near the tidal zone of the steel sheet pile quay 1 are open. along with the float tank 14a.

14b and 14C are attached. Such a box 1
2 is divided into three parts with a dividing surface of 15.15 to make it convenient to transport. The split surfaces 15.15 are connected by a flange connection, which is not shown in the figure. A work shelf 16 and a ladder 17 for ascending and descending are attached to the inner surface of the box 12.

In the present invention, this work box 11 is mounted on the attached steel sheet pile quay 1, and for this mounting, first, the water stop packing piece 18 is inserted into the groove 2 of the steel sheet pile quay 1.

As shown in FIG. 2, this waterproof sealing piece 18 has a structure in which a sponge rubber material 19 is covered with a rubber sheet 20, and the entire structure can be elastically expanded and contracted, and the width is approximately the same as the width of the groove. , when the tip is fitted into the groove 2
It is formed to a size that protrudes from the treetops.

In addition, there are hanging pieces 2 on the upper and lower surfaces of this waterproof packing chest 18.
1 are integrally protruded, and permanent magnets 22 are attached to the upper and lower edges of the groove 2 on the side corresponding to the bottom.

This water-stop gasket 1418 is fitted into the work box 11 at a height position where the bottom plate 23 faces. When fitting it, the weight 25 is suspended from the lower hanging piece 21 with the rope 24, and the weight 25 is placed on the bottom. In this state, lower the loaf 24 so that the water-stop gasket 1!18 is at the specified height.
Adjust the height in advance. And this weight 25
The packing piece 18 is sunk to a predetermined height position by landing on the bottom, and the water stop packing piece 18 is fitted into the groove 2, and the permanent magnet 22 is attracted to the inner surface of the groove 2.

Next, rod-shaped packings 26 are attached to both side walls 13.13 of the work box 11 and the front edge of the bottom plate 23, and the float tank 14 is attached.
a, 14b, and 14c to adjust their buoyancy, and then sink to a predetermined depth and press against the protruding end surface of the water-stop packing chest 18 and the surface of the steel sheet pile quay 1.

At this time, the protruding valve from the concave groove 2 is pushed into the water cutoff packing piece 18, whereby the outer circumferential surface of the inner surface of the concave groove 2 is pressed against the water cutoff packing piece 18, thereby shutting off the water. In addition, other parts are rod-shaped packing 26
is interposed between the quay wall side edge of the work box 11 and the quay wall surface to shut off water.

By draining the water in the work box 11 in this state,
A work space is formed within this work box 11 with the quay surface exposed to the outside air.

(Effects of the Invention) The method for installing a work box for a steel sheet pile quay according to the present invention is configured as described above, and the work box is installed separately from the work box at a position where the joint edges of the work box face each other in each groove of the steel sheet pile wall. Insert a water-stop gasket for filling the groove made of a stretchable elastic material, and then connect the joint edge of the work box facing the steel sheet pile wall surface with the water-stop gasket through the water-stop gasket as appropriate. By making pressure contact with the outside surface of the piece and the steel sheet pile wall surface, it is possible to stop water inside the work box without any problem even if there are variations in the spacing between the grooves on the steel sheet pile quay, and it is also possible to stop water inside the work box without any problem. By manufacturing various types of water-stop packing pieces according to the groove shape of the steel sheet pile quay wall, the same work box can be used for various steel sheet pile quay walls with different groove shapes. .

[Brief explanation of drawings]

Figure 1 is a perspective view of an example of a work box used in the present invention, Figure 2 is a perspective view of an example of a work box used in the present invention;
The figure is a sectional view of the water-stop sealing piece, Fig. 3 is a side view showing the fitted state of the water-stopping sealing piece, Fig. 4 is a plan view of the same, Fig. 5 is a cross-sectional view of the work box attached, and Fig. 6 ( A>(B) are cross-sectional views of different examples of steel sheet pile wharves to which work boxes are to be installed, Figure 7 is a perspective view of a conventional work box, and Figure 8 is a conventional work box and a steel sheet pile wharf. It is a plan view showing the relationship between 1... Steel sheet pile quay, 2... Concave groove, 11... Work box, 18... Water stop packing piece, 23... Bottom plate, 26...
・Rod-shaped patchkin.

Claims (1)

[Claims] Work to form a dry space by covering the outer surface of the steel sheet pile berth on a quay wall that is retained by a steel sheet pile berth in which a large number of steel sheet piles are connected in the width direction and many vertical grooves are formed on the outer surface. In a method for installing a work box for a steel sheet pile quay in which a box is attached via a water-stop packing, a work box separate from the work box is placed at a position where the joint edges of the work box face each other in each groove of the steel sheet pile wall. A water stop packing piece made of a stretchable elastic material for filling the groove is inserted, and then the outer surface of the water stop packing piece is inserted into the joint edge of the work box facing the steel sheet pile wall through the water stop packing as appropriate. and a method for installing a work box for a steel sheet pile quay, which is characterized in that it is brought into pressure contact with a steel sheet pile wall surface.