JPH0794744B2 - Foamed resin member attached to the earth pressure member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to earth pressure from a side such as a member for constructing a water channel (assembled fence groove, U-shaped groove block, etc.), a retaining wall member, a revetment member, etc. The present invention relates to a foamed resin member that is attached to a member to be subjected to earth pressure in order to relieve the earth pressure when the ground is frozen.

[Prior Art] Although the various types of earth pressure members listed above are designed to have sufficient strength to withstand the earth pressure from the sides, It was necessary to carry out a special construction method in order to give pressure.

For example, in the drainage channel 51 shown in FIG. 5, a groove 53 is excavated in the ground 52, a foundation 54 is provided at the bottom by laying pebbles, gravel, or the like or by placing concrete, and a plurality of foundations 54 are provided on the foundation 54. A U-shaped groove block 55 made of concrete is placed, and the U-shaped groove blocks 55 are connected in series. Where U
The outer side surface of the groove groove block 55 (refers to the side surface on the ground side.
the same. If the ground 52 is directly backfilled in), the U-shaped groove block 55 may be directly damaged by the ground pressure and damaged when the ground 52 is frozen and the ground pressure is significantly increased.

In order to prevent the damage, the outer surface of the U-shaped groove block 55 and the ground
A construction method is often used to relieve the earth pressure by providing a gravel layer between the 52 and 52, but the construction work was troublesome.

Therefore, recently, as shown in FIG. 5, a U-shaped groove block is used.
A construction method has been considered in which a styrofoam block 56 is additionally provided on the outer surface of 55, and the damage accident is prevented by the frost rising pressure relieving action and heat retaining action of the ground 52 by the styrofoam block 56.

[Problems to be Solved by the Invention] However, the upper surface of the styrofoam block 56 may be exposed on the ground 52 from the beginning of construction depending on the construction site. Also, as shown by the chain line in FIG.
Even if the upper surface of the styrofoam block 56 is covered with earth and sand at the beginning of construction, the earth and sand may be thinned or disappear due to subsequent subsidence or erosion of the ground 52, and the upper surface may be exposed.

In this case, if you burn the plants 57 around the drainage channel 51,
There has been a problem that the upper part of the styrofoam block 56 is burned by the combustion heat. In addition, there is a problem that the upper portion of the styrofoam block 56 physically or chemically deteriorates with time.

The object of the present invention is not only to solve the above-mentioned problems, but also to prevent the damage of the earth pressure member by relaxing the earth pressure at the time of freezing of the ground simply by the foam resin member, and increase the weight and cost of the foam resin member. It is an object of the present invention to provide a novel foamed resin member capable of preventing burning damage due to open burning of the foamed resin member itself and mitigating deterioration over time while minimizing the above-mentioned problems.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the present invention, in a foamed resin member attached to the side surface on the ground side of a concrete earth pressure member to be used by being buried in the ground, The fireproof layer made of a refractory material is coated only on the upper end portion including the upper surface of the foamed resin member, and the refractory layer is not coated on the remaining portion of the foamed resin member.

[Operation] Also in the foamed resin member of the present invention, the upper end portion including the upper surface thereof may be exposed on the ground from the beginning of the construction, or may be exposed due to subsidence or erosion of the ground after the construction.

However, even if the plants around the earth pressure member are burnt in such a case, according to the foamed resin member of the present invention, the refractory layer formed on the upper end portion including the upper surface blocks the combustion heat of the burning. It is possible to prevent burning of the upper end portion including the upper surface of the foamed resin member. Further, since the fire-resistant layer physically protects the upper end portion including the upper surface of the foamed resin member (and further chemically depending on the fire-resistant material), deterioration over time of the foamed resin member can be reduced.

Further, when the ground is frozen and the earth pressure is increased, the foamed resin member exerts a frost heaving pressure relaxing action and a heat retaining action of the ground.

First Embodiment A first embodiment shown in FIGS. 1 and 2 is one in which the present invention is embodied in a foamed resin member attached to a U-shaped groove block.

In the drainage channel 1 shown in the figure, a groove 3 is excavated in the ground 2, and a pebbles, gravel, etc. are laid at the bottom of the channel 3 to provide a foundation 4, and a U-shape is provided on the foundation 4. Groove block 5
A plurality of them are connected, the U-shaped groove blocks 5 are connected in series, and foamed resin members 6 are additionally provided on both outer surfaces of the U-shaped groove blocks 5, and the ground is formed on the outer surfaces of the foamed resin members 6. It is formed by backfilling 3.

The U-shaped groove block 5 is a U-shaped precast concrete block, and three drain holes are formed on both side walls of the concrete block, and a mesh filter 8 is attached to each drain hole 7. Has been. The number and position of the drain holes 7 can be arbitrarily changed.

The foamed resin member 6 is a plate-shaped block formed by foamed resin molding or collective molding of foamed resin-like bodies. The synthetic resin material, the foaming state and the foaming rate are not particularly limited, but the water absorption is eliminated and the temperature is kept warm. Independent foaming is preferable from the viewpoint of enhancing the action. In this embodiment, the foamed resin member 6 made of independently foamed styrofoam resin is used. The foamed resin member 6 has three through holes 9 communicating with the drain holes 7.

Further, the foamed resin member 6 may extend to the upper end surface of the U-shaped groove block 5 and be exposed on the ground 2 from the beginning of construction, as shown on the left side in FIGS. 1 and 2, or on the right side. As shown in Fig. 2, the U-shaped groove block 5 may extend slightly below the upper end surface of the U-shaped groove block 5 and be covered with earth and sand as shown by a chain line in Fig. 2.

A refractory layer 10 made of a refractory material is formed on the upper end portion of the foamed resin member 6 including the upper surface thereof. The fire-resistant layer 10 may be formed by coating a fire-resistant material such as cement paste, mortar, aerated cement paste, or aerated mortar on the foamed resin member 6, or may be formed by coating the fire-resistant material, asbestos mat, glass wool mat, or the like. It is also possible to assemble and adhere to the foamed resin member 6 a molded body previously molded of another refractory material to form a coating. In this example, the fireproof layer 10 was formed by coating a cheap mortar having excellent fire resistance.

Further, the refractory layer 10 may be formed by any of the following procedures.

A fireproof layer 10 is formed on the foamed resin member 6 in a factory, and the fireproof layer 10 is delivered to a construction site.

The materials or molded products of the foamed resin member 6 and the fireproof layer 10 are independently carried into a construction site, and the foamed resin member 6 is coated with the fireproof layer 10 at the construction site.

Further, the fire resistant layer 10 may be formed only on the upper end portion including the upper surface of the foamed resin member 6, and for example, only the upper surface,
It can be formed on any one of the upper surface and the outer surface, the upper surface, the outer surface, and the inner surface as shown. The refractory layer is not formed on the rest of the foamed resin member 6.

In the first embodiment configured as described above, the upper end portion including the upper surface of the foamed resin member 6 is exposed on the ground 2 from the beginning when it is constructed like the one on the left side in FIGS. 1 and 2. Sometimes Also, even if the earth and sand are covered at the beginning of construction like the one on the right side, the earth and sand may become thin due to the subsidence or erosion of the ground 2 thereafter, or the upper surface of the foamed resin member 6 may be exposed due to disappearance. There is also.

However, in such a case, even if the vegetation 11 around the drainage channel 1 is burnt, according to the foamed resin member 6 of this embodiment, the refractory layer 10 formed on the upper end portion including the upper surface covers the burning heat of burning. Since it is blocked, it is possible to prevent burning of the upper end portion including the upper surface of the foamed resin member 6. Further, since the fire-resistant layer 10 physically protects the upper end portion including the upper surface of the foamed resin member (more chemically depending on the fire-resistant material), deterioration with time of the foamed resin member 6 can be reduced. .

Further, when the ground 2 freezes up and the earth pressure increases, the foamed resin member 6 exerts a frost lifting pressure relaxing effect and a heat retaining effect on the ground 2, so that the side wall portion of the U-shaped groove block 5 is prevented from being damaged. You can

[Second Embodiment] A second embodiment shown in FIG. 3 shows a suitable construction method particularly in a region with severe freezing, in which the foamed resin member 6 is attached to the outer surface of the upper end of the U-shaped groove block 5. This is different from the first embodiment in that another foamed resin member 12 is additionally provided so as to abut on the upper surface of the.

At least the upper surface of the foamed resin member 12, for example, only the upper surface, the upper surface and the outer surface, the upper surface and the inner surface, the entire surface of the member, or the like, is coated with the fire resistant layer 13 made of the fire resistant material. Therefore, it can be said that the fire-resistant layer 13 is formed only on the upper end portion including the upper surface of the foamed resin members 6 and 12 as a whole. The foamed resin member 12 can be pressed by further placing a concrete block or the like on the upper surface of the foamed resin member 12, but when the refractory layer 13 is heavy, the foamed resin member can be formed only by the refractory layer 13 without placing anything. Can be prevented from moving to 12.

Also in this embodiment, the same effect as that of the first embodiment is obtained by the refractory layer 13.

[Third Embodiment] A third embodiment shown in FIG. 4 is an example in which a foamed resin member 16 is attached to the outer surface of a concrete panel 15 constituting the assembled fence groove 14.

In this embodiment, at least the upper surface of the foamed resin member 16 provided on the outer surface of the uppermost concrete panel 15, for example, only the upper surface, the upper surface and the outer surface, the upper surface and the inner surface, the entire member, etc., the fireproof A refractory layer 17 made of a conductive material is formed by coating. Therefore, the three-stage foam resin member 16,1
It can be said that the refractory layer 17 is formed only on the upper end portion including the upper surface of the refractory layer 16 as a whole.

Also in this embodiment, the same effect as that of the first embodiment is obtained by the refractory layer 17.

The present invention is not limited to the configurations of the above-described embodiments, but may be embodied by being arbitrarily modified within the scope of the gist of the invention as follows, for example.

(1) The drainage is improved by providing a water collecting groove extending to the through hole 9 on the outer surface of the foamed resin member 6,
It is also possible to improve the submergence by submerging water channels on 12, 16 outer and / or inner surfaces.

(2) The present invention can also be embodied in a foamed resin member that is attached to a member for constructing a water channel other than the U-shaped groove block, a retaining wall member, a revetment member, and other various earth pressure members.

EFFECTS OF THE INVENTION Since the foamed resin member additionally provided for the earth pressure member of the present invention is configured as described above, the earth pressure at the time of freezing of the ground is simply relieved by the foam resin member to reduce the earth pressure member. Not only can the damage of the foamed resin member be prevented and the increase in the weight and cost of the foamed resin member can be minimized, but it is also possible to prevent burnout due to open burning of the foamed resin member itself and reduce deterioration over time. Produce an effect.

[Brief description of drawings]

1 is a perspective view showing a first embodiment, FIG. 2 is a sectional view showing the same, FIG. 3 is a sectional view showing a second embodiment, FIG. 4 is a sectional view showing a third embodiment, and FIG. [FIG. 7] is a cross-sectional view showing a conventional example. 5 …… U-shaped groove block as earth pressure member, 15 …… Similar concrete panel, 6,12,16 …… Foam resin member, 10,13,17 …… Fireproof layer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area E02D 31/14

Claims (1)

[Claims] 1. A foamed resin member attached to a ground side surface of a concrete earth pressure member (1,15) to be used by being buried in the ground, wherein the foamed resin member (6, 12, 16) is Refractory layer made of refractory material only on the upper end including the upper surface (10,13,17)
And a refractory layer is not formed on the remaining portion of the foamed resin member (6, 12, 16).