JPH0478764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wall that serves as a support and also serves as an overtopping prevention wall when constructing the superstructure of a caisson or other structure installed on the sea or on the water.

[Prior Art] When constructing a superstructure after installing a caisson or the like on a predetermined sea or water surface, the conventional method of construction was to wait for the tide level to drop, that is, the intertidal construction method. If construction using this intertidal construction method does not prevent the intrusion of outside water from the structure, temporary water-stop walls are installed to use underwater concrete or perform construction in the air, that is, dry construction.

[Problems to be solved by the invention] By the way, if the structure is large-scale and the construction period is long,
The tidewater method is disadvantageous in terms of construction period. Additionally, as the construction period becomes longer, it is necessary to assume that wave heights will be larger during stormy weather, making construction difficult using the tidal method. Therefore, in order to carry out the dry construction method without being affected by tide levels or waves, it is necessary to install temporary water-stop walls. However, the temporary water-stop walls that have been implemented in the past are designed only to stop water and do not have a structure that also serves as support for the construction of heavy overhangs from caissons, etc., and they also have a structure that can be used for multiple structures. It hasn't become popular. Therefore, the purpose of the present invention is to provide a structure that will not be affected by tide levels or waves during rough weather even during long-term construction, and that can also be used not only to stop water but also as a support for construction of heavy overhangs from caisson etc. death,
To provide a wall that serves as shoring and wave overtopping prevention wall when constructing superstructures such as caissons, which secures work space around the outer circumference of superstructures, allows dry construction to be carried out safely in the same way as onshore construction, and can be used for multiple structures. .

[Means for Solving the Problems] According to the present invention, in a wall that serves as a shoring/overtopping prevention wall during construction of the superstructure of a structure installed on the sea or on water, such as a caisson, the upper edge of the caisson, etc. is provided with a frame. A first water-stop wall that extends outward and is removably attached to the wall and has a height that prevents waves from overtopping;
and a second water-stopping wall that removably covers the space between the first water-stopping wall and the first water-stopping wall that is attached to the upper frame. and a wall section fixed to the upper frame, and a lower block consisting of a lower frame and an overhang section fixed to the lower frame. A main part parallel to the main part and having a height that does not overtop the caisson, and a side part perpendicular to the main part and lower than the upper edge of the caisson are formed, and the second water-stop wall is made up of a vertical wall part and a horizontal overhang part. It is completed.

[Operations and Effects of the Invention] Therefore, depending on the shape of the upper edge of the caisson, etc., the first
and a second water-stop wall are installed in combination, and the overhanging portions of these walls form the support for the superstructure to secure work space, and the wall portion forms a wave-topping prevention wall that cannot be overtopped. be able to. Since these first and second water-stop walls are removable, they can be used to construct multiple caissons, which is economical.

[Preferred Embodiment] When carrying out the present invention, the mutual joint surfaces of the first and second water-stop walls and the joint surfaces with the caisson etc.
It is preferable to interpose a waterproof packing and, if necessary, a silicone sealant.

In carrying out the present invention, it is preferable that the first water-stopping wall is configured to be separable into an upper block and a lower block. In this way, it can be installed using a small capacity crane and costs can be reduced.

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows a known caisson 1 for implementing the present invention, in which the upper edge 2 of the caisson 1 is slightly higher than the outside water surface W, and a portion 3a is approximately at the same level as the outside water surface W. At the upper part of this caisson 1, overhanging parts 5a and 5b are formed of heavy superstructure concrete 4.

FIG. 2 shows the caisson 1 shown in FIG. 1 with a shoring/overtopping prevention wall according to the present invention attached, and the upper edge is provided with a shoring/overtopping prevention wall (hereinafter abbreviated as "wall"), which is designated by the numeral 10 as a whole. ) is provided.

As shown in FIG. 3, the wall 10 is a first water-stop wall (hereinafter abbreviated as the first block) divided into blocks according to the shape of the upper edge of the caisson 1.
J, L, N, O, Q, R, T and the second water-stop wall (hereinafter abbreviated as the second block) K, M, P,
It is formed by S.

FIG. 4 shows the first blocks J, L and the second blocks K, M attached to the upper edge 2 of the caisson 1 in the recess 3 at approximately the same level as the outer water surface.

The first blocks J and L are formed symmetrically with respect to the vertical plane, and therefore block J will be mainly described. The block J includes an upper frame 12 and a wall portion 13 fixed to the upper frame 12.
an upper block 11 consisting of and a lower frame 1
8 and an overhang 1 fixed to the lower frame 18
9 and a lower block 17. The wall portion 13 is formed with a main portion 14 parallel to the upper edge 2 of the caisson and side portions 15 at right angles, and the height of the main portion 14 from the outside water surface W is the maximum expected during the construction period. The side part 15 is formed at a height slightly lower than the upper edge part 2 of the caisson, and a horizontal flange part 16 is provided at the upper end to protrude outward, and the upper surface of the overhang part 19 is caisson 1
The upper edge portion is formed slightly lower than the lower edge 3a of the recessed portion 3.

The second block K consists of a vertical wall portion 20 and a horizontal overhang portion 21, and is formed to cover the opposing ends of the wall main portion 14 and overhang portion 19 of the blocks J and K from the outside. ing.

When installing the blocks J, K, L, and M, the blocks J and L are installed on both sides of the recess 3 in the upper edge 2 of the caisson, forming a gap D. Next, block K,
M is bolted to blocks J and L to integrate them. That is, the ~ planes, ~ planes of block J and the ~ planes, ~ planes, ~ planes of block K
~ face, ~ face and ~ face of block L,
The ~ faces of the block L and the ~ faces of the block M are joined and integrated, respectively, and the gap D is covered. Similarly, the first and second blocks are integrated to form a shoring/overtopping prevention wall 10 on the upper edge 2 of the caisson 1.

FIG. 5 shows another embodiment of the first block (for example, block J), which is formed so that it can be divided into an upper block 11 and a lower block 17 when block J is heavy and requires a crane with large capacity. This is an example.

This divisible first block J or L,
The attachment of the second block K to the caisson 1 will be explained in detail by taking the second block K as an example.

In FIG. 6, the lower end a of the lower frame 18 of the lower block 17 is connected to a piece 7 with a bolt 25 to a nut 6 buried in the lower part of the caisson 1.
is connected to the lower frame 1 by a pin 22.
The inner upper end b of 8 is connected to the nut 8 buried in the upper part of the caisson 1 by a bolt 25. At this time, a water-stop packing 24 is interposed on the surface of the upper end b that contacts the caisson 1, and a silicone sealing material is interposed as necessary.

Next, the upper frame 12 of the upper block 11
The outer lower end c is connected to the outer lower end d of the lower frame 18 by a pin 22, and the inner lower end e is connected to the bracket 18 of the lower frame 18 by a bolt 25.
Combines with a. At this time, a water-stop packing 24 is interposed on the surface of the inner lower end e which is in contact with the bracket 18a, and a silicone sealing material is interposed as necessary.

In FIG. 7, the right end portion of the wall portion 20 of block K is superimposed on the outer surface of the left end portion of the main wall portion 14 of block L, and the nut 26 welded to the wall portion 20 is attached.
are connected and integrated by a water stop packing 27, a washer 28, and a bolt 29. Similarly, the right end portion of the overhanging portion 21 is overlapped and joined to the lower surface of the left end of the overhanging portion 19 to be integrated. In addition, water stop packing 3 is provided on the joint surfaces of block L and block K and the joint surface of block K and caisson 1, respectively.
0 and 31 are interposed, and a silicone sealant is interposed as necessary.

[Summary] As explained above, according to the present invention, the first and second blocks are installed in combination according to the shape of the upper edge of the caisson, etc., and these blocks form a support to secure the work space. Moreover, it is possible to form a wave overtopping prevention wall that cannot be overtopped. Since these first and second blocks are detachable, they can be used to construct a plurality of caissons, which is economical.

Note that the shoring/overtopping prevention wall may be installed after the caisson, etc. is installed in the designated position, but if there is a risk of outside water entering the inside of the caisson etc. during installation due to the structure of the caisson, etc. It is preferable to install the caissons above the water level before transporting the caisson etc. to the installation location.

In addition, if the structure of the caisson is such that most of the height of the upper edge is sufficiently higher than the outside water surface and some parts are lower than the outside water surface, the shoring/overtopping prevention wall should be installed around the entire periphery of the caisson, etc. It is preferable not to attach it to the ceiling, but to partially attach it to a lower part. It can also be used to repair underwater parts of existing structures installed on the sea or on water.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a known caisson embodying the present invention, Fig. 2 is a perspective view showing a caisson equipped with a shoring/overtopping prevention wall embodying the present invention, and Fig. 3
The figure is a top view of a caisson illustrating an example of dividing blocks into shoring/overtopping prevention walls, Figure 4 is an exploded perspective view showing how the first and second blocks are attached to the caisson, and Figure 5 is an exploded perspective view showing how the first and second blocks are attached to the caisson. FIG. 6 is an exploded perspective view showing how the first block shown in FIG. 5 is attached to the caisson. FIG. 7 is a perspective view of the first and second blocks. FIG. 3 is a perspective view showing a coupled state. D...Between the first and second blocks〓, J, L,
N, O, Q, R, T...first block, K,
M, P, S...second block, 1...caisson, 2...upper edge of caisson, 4...superstructure concrete, 10...shoring/overtopping prevention wall, 11...
...Top block, 12...Top frame, 13...
... Wall part, 17 ... Lower block, 18 ... Lower frame, 19 ... Overhang part, 20 ... Wall part, 21
...Protrusion section, 24, 30, 31...Water stop packing.

Claims (1)

[Claims] 1. For supporting and overtopping prevention walls during construction of superstructures of structures installed on the sea or water such as caissons,
A first water-stop wall body having a frame and projecting outward from the upper edge of a caisson etc. and removably attached thereto has a height that prevents waves from overtopping; and a second water-stopping wall that removably covers the space between the first water-stopping wall,
The first water-stopping wall body includes an upper block consisting of an upper frame and a wall portion fixed to the upper frame, and a lower block consisting of a lower frame and an overhang portion fixed to the lower frame. The wall portion is formed with a main portion parallel to the upper edge of the caisson and having a height that does not overtop the waves, and a side portion that is perpendicular to the main portion and lower than the upper edge of the caisson.
The water-stopping wall is composed of a vertical wall part and a horizontal overhang part, and is a supporting and overtopping prevention wall when constructing a superstructure such as a caisson.