JPS6016670Y2 - concrete earth retaining fence culvert - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to an earth retaining fence culvert constructed by joining concrete fence plates along an earthen wall, and sand prevention mats and sand prevention sheets. This invention relates to a concrete earth retaining fence culvert that can prevent so-called earth and sand from being sucked out from the back side of the fence culvert without using.

[Conventional technology]

This type of concrete earth retaining fence culvert has the function of preventing the earth wall from collapsing and draining water seeping from the ground side to the front side of the fence culvert (the side opposite to the side in contact with the earth wall, the same shall apply hereinafter). I need.

Water that seeps out of the ground is normally drained to the front side through the joints between the fence boards that make up the fence culvert, but in some cases drainage holes are especially created in the fence boards (for example,
-97 Publication).

However, since the water that seeps out from the ground usually contains a large amount of sediment, the soil from the ground leaches to the front side of the fence culvert along with the above drainage, causing a phenomenon called so-called sand suction, There is a risk of loosening.

Therefore, conventionally, when constructing this type of concrete earth retaining fence culvert, a water-permeable sandproof mat or sandproof sheet is interposed between the fence plate and the earthen wall.

In addition, by providing a groove on the back side of the fence board and storing a water-permeable material in the groove, there is a method for guiding water seeping from the ground to a predetermined place and draining it through a pipe, etc. (for example, Japanese Patent No. 50-22403) has also been proposed.

[Problem that the invention attempts to solve]

However, concrete earth retaining fence culverts are constructed by backfilling the fence plates with earth and sand while sequentially joining them from the bottom to the top, and then stacking the earth and sand in the longitudinal direction along the formed earth wall. It is extremely difficult to interpose sand control sheets and sand prevention mats, which are flexible and have irregular shapes, between the fence culvert and the earthen wall.

In addition, the anti-sand sheets and anti-sand mats have a low anti-sand effect unless they are tightly interposed at the interface between the fence culvert and the earthen wall.In addition, the anti-sand sheets and mats are easily damaged during the above construction work, and in the damaged areas. It has the disadvantage of reducing the sand control effect.

On the other hand, the latter method, which uses permeable material stored in the trench, does not have the difficulties associated with such construction, but it cannot prevent soil from seeping into the front side of the fence culvert from the joints between the fence boards, and its sand control effect is There are limits to

This invention was made in order to solve these conventional problems, and the aim is to provide a concrete earth retaining fence culvert that is easy to construct and can effectively prevent earth and sand from seeping out from the joints. This is the purpose.

[Means to solve the problem]

Hereinafter, the configuration of this invention will be explained in detail based on illustrated embodiments.

As shown in FIGS. 1 to 4, grooves 3 and 7 are provided along the longitudinal direction of the joint surfaces of the upper and lower fence plates 1 and 4 constituting the concrete earth retaining fence culvert.

Further, slits 2, 5°6, which are shallower than the grooves 3, 7, are provided in the joint surfaces of the upper and lower fence plates 1, 4 in the thickness direction thereof.

These grooves 3, 7 and slits 2, 5.6 are formed on the upper and lower fence plates 1.
, 4 may be provided only on the joining surface of either one of the fence plates 1, 4, but if possible, both the upper and lower fence plates 1, 4 may be provided as shown in the figure.
It is preferable to provide them at mutually corresponding positions.

Furthermore, these fence plates 1 and 4 are joined vertically as shown in FIG. 6 to construct a concrete earth retaining fence culvert.

At this time, a long water-permeable material 9 is housed in the grooves 3 and 7, and is interposed in a compressed state between the joint surfaces of the fence plates 1 and 4.

In addition, in the state where the fence plates 1 and 4 are joined in this way, between the joint surfaces by the sulin l'2t 5t 6,
Drainage holes are formed at so-called joint positions that penetrate from the back of the fence culvert to the front.

When constructing this fence culvert, usually fence posts 10 are erected for each span as shown in FIG. 6, and the fence boards 1 and 4 are joined in the longitudinal direction via these posts.

In the illustrated case, as shown in FIG.
A groove 11.11 is provided in the vertical direction at the end of the fence 11.11, and the same water-permeable material 12.12 as described above is housed in this groove, and this is inserted between the joint surfaces of the fence boards 1, 4 and the fence post 10. It is intervening.

The water-permeable materials 9 and 12 are preferably elastic, have good water permeability, and are highly effective in filtering dirt, such as sponges, synthetic fibers, animal or vegetable natural fibers, etc. can be used.

[Effect]

In the earth retaining fence culvert according to this invention, water seeping from the ground is drained to the front side through the joint between the fence plates 1 and 4 and the through holes formed there.

At this time, since the water-permeable materials 9 and 12 filter the earth and sand contained in the water, the earth and sand are prevented from passing through the joints.

[Effect of idea]

As explained above, according to this invention, the passage of earth and sand in the fence culvert is prevented, so that so-called suction of earth and sand is prevented.

In particular, fence boards 1 and 4 are installed without using sand prevention sheets or sand prevention mats.
while maintaining water permeability from the so-called joints between the joint surfaces),
It is possible to completely prevent the suction of earth and sand from there.

[Brief explanation of the drawing]

The drawings all show examples of this invention; Fig. 1 is a perspective view showing the upper fence plate constituting the concrete earth retaining fence culvert, Fig. 2 is a cross-sectional view of the same, and Fig. 3 is the same. A perspective view showing the lower fence plate constituting the above-mentioned fence culvert, Figure 4 is a sectional view of the same, Figure 5
The figure is a cross-sectional end view of the fence posts constituting the fence culvert, and FIG. 6 is a perspective view showing the assembled state of the fence culvert. 1.4...Fence board, 3,7...Groove, 2,
5, 6... Slit, 9, 12... Water permeable material.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a concrete earth retaining fence culvert constructed by joining concrete fence plates along an earthen wall, a groove is provided along the joint surface of the fence plates, and a water-permeable material is injected into this groove. This is compressed and interposed between the bonding surfaces of the fence boards, and a slit shallower than the groove is provided in the bonding surfaces of these fence boards.
A concrete earth retaining fence culvert characterized by forming drainage holes penetrating through the thickness of the fence plate. 2. The earth retaining fence and culvert according to claim 1, wherein the water-permeable material is a sponge. 3. The earth retaining fence and culvert according to claim 1, wherein the water-permeable material is made of fibrous material.