JPS583885Y2 - manhole - Google Patents

Description

[Detailed description of the invention] This invention relates to a lightweight manhole that can be used in narrow spaces and is easy and quick to construct.More specifically, a hollow disc-shaped bottom block is installed at the bottom of the manhole hole. At the same time, the second manhole straight wall block,
This invention relates to a manhole characterized by being constructed by sequentially stacking one-sided inclined wall blocks, adjustment blocks, etc.

Conventional manholes of this type are, for example,
As shown in Publication No. 69, the lower part was made of cast-in-place concrete and the upper part was made of blocks, but it was difficult to work in narrow spaces, and because the lower concrete part was heavy, it was difficult to work on soft ground. There were drawbacks such as subsidence, which required many days to construct, and increased costs.

The manhole according to the present invention is a completely new technology developed in view of the drawbacks of the conventional technology.

To specifically explain one embodiment of the manhole according to the present invention with reference to the drawings, in Figs. The upright edge 2 is configured to stand up and protrude, and is installed on a chestnut stone 3 provided at the bottom of the manhole hole.

On the upper surface of the bottom block 1, a frame block 5 having a protruding edge 4 that can engage with the upright edge 2, a straight wall block 6, a one-sided inclined wall block 7, an adjustment block 8, and a lid holder 9 are stacked in order from below. Furthermore, by pouring concrete 10 into the inner bottom of a manhole constructed of these blocks, or by using blocks as a part of the concrete, bottom slab blocks 1 and chestnut stones 3 etc. can be poured through the concrete 10. The foundation and the lower part of the frame block 5 are interconnected, respectively, and constitute the inner bottom surface or invert of the manhole and the foundation stand.

As is clear from the figure, a part of the one-sided inclined wall block 7 becomes an upright wall a, and the upper edge of that part gradually inclines and projects inward to form a thick wall, and furthermore, the frame block 5, A footrest 11 is provided protruding from the upright wall a of the direct block 6 and the inclined wall block 7.

In the figure, reference numeral 12 denotes a pipe conduit attached to the frame block 5, and the surrounding area is sealed with mortar caulking 13.

In the above embodiment, the bottom plate block 1 is configured in a donut shape, but the bottom plate block 1 can be configured in any shape such as a square.

When constructing the manhole according to the present invention on soft ground, as shown in Fig. 4, it is possible to stabilize the lower part of the manhole and prevent the manhole from sinking by using a bottom block 1 with a large outer diameter. I can do it.

The manhole according to the present invention is constructed by installing a donut-shaped hollow disc-shaped bottom block having the above-mentioned special structure on the bottom of the manhole hole, and stacking blocks on top of this, so that it is difficult to excavate for manhole construction. The width can be made extremely small, so it is possible to work in narrow spaces, and since the bottom block is composed of a hollow disc, it is extremely light and convenient to handle, and the weight of the entire manhole is significantly reduced. It is light and saves materials at the same time, and when stacking other blocks on this bottom block, you can enter this hollow hole and use it as a foothold. By installing a pump inside the hole, water accumulated in the hole can be drained to the surface, and by bringing the surveying stake to the center of the hole, the bottom block can be easily and securely installed in the correct position. Finally, by pouring concrete into this hole and its surroundings, or by using a block as a part of the concrete, the bottom block, the foundation such as chestnut stone, and the lower part of the frame block are connected to each other, and the inside of the manhole is constructed. The bottom surface, invert, and foundation can be constructed strongly, and since the bottom block is hollow, there is no need to make the bottom of the manhole hole completely smooth, and the bottom block can be of various diameters. Since it can be easily prepared, manholes can be constructed stably even on soft ground by using it.

[Brief explanation of drawings]

1 and 2 are cross-sectional explanatory views, FIG. 3 is a perspective view of the bottom block, and FIG. 4 is an explanatory view of the other side. 1: Bottom block, 2: Upright edge, 5: Frame block, 7
: Single-sided inclined wall block, 11: Footrest, a: Upright wall, b
: Upper edge.

Claims (1)

[Scope of utility model registration request] A hollow plate-shaped bottom block 1 is installed at the bottom of a manhole hole, and a frame block 5, a straight wall block 6, and a single-sided inclined block 7 are stacked in this order in order, and concrete 10 is poured onto the bottom block 1 to form the bottom plate. The hole in the center of the block 1 is buried and the bottom block 1, the foundation made of chestnut stone 3, etc., and the lower part of the frame block 5 are interconnected via concrete 10 to form the inner bottom surface and foundation of the manhole. The characteristic manhole.