JPS6040694Y2 - Gutters on soft ground - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a gutter for waterways built on soft ground.

When constructing a waterway with a U-shaped cross section, for example, using concrete gutter bodies on soft ground, countermeasures against ground subsidence are most important.

Conventional methods for this purpose include driving piles or laying sleepers at the connecting parts of side gutter bodies.

This idea also takes countermeasures against ground subsidence, but in addition to constructing underground piles by injecting concrete underground at the joints of side gutter bodies to a depth appropriate to the ground conditions, the rough circumferential surface of the piles The contact resistance with the ground creates a stronger gutter support and serves as a countermeasure against ground subsidence.

To explain an example of this invention, the height is 1 m, the length is 29,
A U-shaped concrete side gutter body 1 with a cross-sectional width of 1.577L has notched grooves 4 on both longitudinal edges 3 of the bottom plate 2 to form a circular hole between the edges 3 when the side gutter bodies 1 are connected to each other. It is set up.

Then, after connecting the side gutter body 1, a circular hole 5 formed by the notched grooves 4 is fitted with a 2 to 2.5 m long iron or PVC pipe 7 is driven or screwed in, the soft soil inside pipe 7 is extracted with a sand removal screw or sand removal metal fitting, and crushed stone, sand, and earth are combined into pipe 7 according to the properties of the ground and the bearing capacity of the ground. The agent is applied up to several tens of centimeters below the bottom plate 2 to form a sandstone column a.

Then, all the pipes 7 are removed while being oscillated, and then the soil is removed from a section several tens of centimeters below the bottom plate 2 using a sand removal tool to enlarge the diameter of the circular hole 5 at least, and concrete or mortar is poured into that section. 5 is also closed to form a head shell and create a waterway.

The reason why the sandstone column a is not made of concrete in the same manner as the head shell in the above is because the sandstone column a is made of coarse stones, etc. that are generally difficult to use in concrete liquid, and as a result, it is difficult to use as a support. It has great supporting power.

With the structure as described above, the concrete head shell placed on the compacted sandstone pillar a integrally connects the notched groove 4, that is, the gutter body 1, and the sandstone pillar a. Side gutter body 1
is supported.

Since the sandstone column a forms a circumferential surface in which stones are interspaced, it has the effect of increasing resistance to ground subsidence and increasing supporting capacity.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a side gutter constructed according to this invention. FIG. 2 is a perspective view of a drilling tool. In the figure, 1 is the gutter body, 2 is the bottom plate, 3 is the edge, 4 is the cutout groove, 5 is the circular hole, 6 is the brim, 7 is the pipe, a is the sandstone column, and b is the head shell.

Claims (1)

[Scope of utility model registration request] In a gutter for a waterway constructed by connecting concrete gutter bodies 1, a cutout groove 4 is provided on the open edge 3 of the bottom plate 2 of the gutter body 1 to form a circular hole 5 when the gutter body 1 is connected, Similarly, at the time of connection, a hole is dug below the circular hole 5, and the lower part of the circular hole is a sandstone pillar a made of sandstone, and the upper part is a concrete head shell with a diameter larger than that of the circular hole 5.The circular hole 5 is filled with concrete. Gutters on soft ground that serve as gutter support columns.