JPH0285413A - Grout sealant - Google Patents

Abstract

PURPOSE:To prevent grout from leaking by inserting an antibody into a jacket leg through hollow elastic rings so as to expand and deform the elastic rings appropriately. CONSTITUTION:Hollow elastic rings 11 are fitted at the upper and lower ends of the inner peripheral surface of a jacket leg 2. An antibody 3 is then inserted into the jacket leg 2. After the antibody 3 being cast in the water bottom, pressure fluid feeding and discharging means 15 is actuated to feed pressure fluid into the rings 11 so as to be expanded and adhered on the inner peripheral surface of the jacket leg 2 and the outer peripheral surface of the antibody 3. The grout 6 is further injected into a space between the jacket leg 2 and the antibody 3 through a grouting hose 5.

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention provides a method for constructing sea berths, foundations for maritime roads, etc., in which each jacket leg of a jacket leg assembly is placed in advance at a predetermined position on the bottom of the water. A grout that effectively prevents leakage of grout from between the antibody and the jacket leg when the antibody is inserted into the water bottom and integrated with the jacket leg by filling the gap between the antibody and the jacket leg. The present invention relates to a sealing material for use.

(Prior Art) Conventionally known grout sealing materials that are disposed between a jacket leg and an antibody inserted therein to prevent leakage of the grout filled between them include, for example, No. and those shown in Figure 5.

In FIG. 4, 1 indicates the jacket leg assembly previously placed on the bottom of the water, 2 indicates each jacket leg, and 3 indicates the antibody inserted into the jacket leg and driven into the bottom of the water. .

Here, the grout sealing material of this example is shown in FIG.
), as is clear from the partially enlarged cross-sectional view shown in (C), it is composed of a solid rubber ring 4 attached to the inner circumferential surface of the jacket leg 2 and in close contact with the outer circumferential surface of the pile body 3. The grout sealing material attached to both the upper and lower ends of the jacket leg 2 is filled into the space between the jacket leg 2 and the pile body 3 via the grout injection hose 5 connected to the lower end of the jacket leg 2. The grout 6 functions to prevent leakage of the grout 6 to the outside.

Note that 7 in the figure indicates a recovery hose for overflowing grout.

The grout sealing material shown in FIG. 5 is composed of a plate-shaped ring 8 made of rubber or synthetic resin and attached to the inner peripheral surface of the jacket leg 2, and this grouting sealing material is also , under its elastic deformation, functions almost similarly to that described above.

(Problem to be Solved by the Invention) However, in the former sealing material shown in FIG. 4, when the pile body 3 is inserted into the jacket leg 2, the pile body 3
There is a high risk of damaging the solid rubber ring 4 that is pre-attached to the inner circumferential surface of the jacket leg 2, and the eccentricity between the jacket leg 2 and the pile body 3 cannot be effectively absorbed, making it difficult to achieve a complete sealing of the grout. There is no problem, also
For the latter sealing material, jacket leg 2 and pile body 3
Even when these are arranged concentrically, this also has the problem of not being able to completely seal the grout due to the sealing material's susceptibility to internal pressure within the structure.

The present invention advantageously solves such problems of the prior art, substantially eliminating the risk of antibody damage and almost completely sealing the grout even when the jacket leg and antibody are eccentric. The present invention provides a sealing material for grout that can be used for grouting.

(Means for Solving the Problems) The grout sealing material of the present invention is attached to a jacket leg, and in a contracted state it closely contacts the inner circumferential surface of the jacket leg, and in an expanded state, it contacts the inner circumferential surface of the jacket leg.
It is composed of a hollow elastic ring that comes into close contact with both the outer peripheral surface of the antibody inserted therein.

(Function) In this grout sealing material, the antibody is inserted into the jacket leg and the hollow elastic ring, in which a reinforcing layer can be buried if necessary, is connected to the pressurized fluid supply/discharge means. When driving, the hollow elastic ring is completely contracted and brought into close contact with the inner circumferential surface of the jacket leg, thereby sufficiently preventing the antibody from coming into contact with the hollow elastic ring, making damage to the hollow elastic ring extremely effective. It can be prevented.

Moreover, with this sealing material, even if the antibody is driven eccentrically with respect to the jacket leg, the hollow elastic ring can be expanded by supplying pressurized fluid to the jacket leg. It will adhere sufficiently tightly and firmly to the inner circumferential surface of the leg and the outer circumferential surface of the antibody.

Therefore, after such expansion of the hollow elastic ring, the grout filled between the jacket leg and the antibody may be damaged due to damage to the hollow elastic ring, eccentricity between the jacket leg and the antibody, lack of internal pressure resistance of the hollow elastic ring, etc. This results in a completely sealed seal without the risk of grout leaking.

Here, after the hollow elastic ring has fully exerted its grout sealing function, in addition to burying it as it is,
It is also possible to replace the internal pressurized fluid with grout and bury it.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, and in the figure, parts similar to those described in the conventional example are designated by the same numbers.

That is, 2 represents the jacket leg, 3 represents the antibody, 5 represents the grouting hose, 6 represents the grout, and 7 represents the grouting hose.
indicate recovery hoses.

In this example, the grout sealing material attached to the inner peripheral surface of the jacket leg 2 at both upper and lower end portions is replaced with a hollow elastic ring 11 made of rubber or rubber-like elastic material with or without a reinforcing layer embedded therein. Configure.

This hollow elastic ring 11 is shown in FIGS. 2(a) and 2(b).
As shown in the partial cross-sectional plan view and partial cross-sectional side view in the contracted state, there is a peeling part 12 in the middle part in the thickness direction.
A plurality of mounting bolts 13 are provided on the outer circumferential surface of a flat ring-shaped elastic structure having a circumferential direction at predetermined intervals, and one bolt protrudes downward or upward (in the figure, downward). The hollow elastic ring 11 is provided with a fluid valve such as an air valve 14, and the hollow elastic ring 11 is ready for use by being fixed to the inner circumferential surface of the jacket leg 2 with each mounting bolt 13, as shown in FIG. be done.

When inserting the pile body 3 into the jacket leg with the hollow elastic rings 11 attached to the upper and lower ends of the jacket leg 2 in this way, first,
The internal fluid is forcibly discharged or naturally discharged by the pressurized fluid supply/discharge means 15 connected to the hollow elastic rings 11 to bring each hollow elastic ring 11 into close contact with the inner circumferential surface of the jacket leg 2, and then Insert the pile body 3. According to this, the risk of the pile body 3 coming into contact with the sufficiently flat ring-shaped elastic structure when inserted is significantly reduced, so damage to the hollow elastic ring 11 by the pile body 3 is extremely effectively prevented. become.

Note that this means that at least one hollow elastic ring 11
This is particularly noticeable when a centering member 16 made of a rigid material is attached to the inner circumferential surface of the jacket leg, as shown by the imaginary line in the figure, at least on either the upper or lower side of the jacket leg. Centering member 16
According to the invention, its tapered guide surface 16a sufficiently corrects the eccentricity of the antibody 3 during insertion and advantageously prevents the pile body 3 from approaching the hollow elastic ring 11.

By the way, after the above-mentioned insertion of the pile body 2 into the jacket leg and driving it into the water bottom, the pressurized fluid supply/discharge means 15 is operated again to release the flat ring-shaped elastic structure. By supplying pressurized fluid to the peeling section 12, each hollow elastic ring 11 is inflated with the required internal pressure and is tightly attached to the inner peripheral surface of the jacket leg and the outer peripheral surface of the antibody as shown in FIG. , and firmly adhere to the jacket leg 2 through the grout injection hose 5.
The grout 6 is injected into the gap between the pile body 3 and the pile body 3, and this injection is continued until the gap is completely filled, in other words, until the grout 6 flows out from the collection hose 7.

The grout 6 filled in this way effectively prevents damage to the hollow elastic ring 11 when the pile body 3 is inserted into the jacket leg 2 due to its close contact with the inner peripheral surface of the jacket leg, and Pile body 3 for jacket leg 2
The eccentricity of the hollow elastic ring 11 is sufficiently absorbed by the difference in the amount of expansion of the hollow elastic ring 11, and in addition, the hollow elastic ring provides sufficient pressure to both the jacket leg 2 and the antibody 30 in response to the internal pressure supplied thereto to counteract the filling internal pressure. Based on the firm adhesion with sufficient force, leakage from between the jacket leg 2 and the pile body 3 is almost completely prevented.

The hollow elastic ring 11 that has performed the grout sealing function as described above can be left as it is, or the internal fluid can be replaced with grout. grout can be more effectively protected from water erosion and other damage.

(Effects of the Invention) Thus, according to the present invention, leakage of the grout filled between the jacket leg and the antibody can be prevented by appropriately expanding and deforming the grout sealing material composed of a hollow elastic ring. It can be completely prevented.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a main part showing an embodiment of the present invention, Fig. 2 is a partial cross-sectional view showing a hollow elastic ring, and Fig. 3 shows how a grout sealing material is attached to a jacket leg. A sectional view showing the state and FIG. 4.5 are views showing a conventional example. 2... Jacket leg 3... Antibody 5... Grout injection hose 6... Grout 7... Collection hose 11.
... Hollow elastic ring 12 ... Peeling part 13 ... Mounting bolt 14 ... Air valve 15 ... Pressurized fluid supply and discharge means gauge - pile body Fig. 2 (a) / (b)

Claims (1)

[Claims] 1. A hollow elastic material that is attached to the jacket leg, and when in the contracted state, it comes into close contact with the inner circumferential surface of the jacket leg, and when in the expanded state, it comes into close contact with both the inner circumferential surface of the jacket leg and the outer circumferential surface of the antibody inserted therein. A sealing material for grout consisting of a ring.