SU1254100A1 - Concrete dam - Google Patents

Description

This invention relates to hydraulic engineering, namely to concrete dams.

The aim of the invention is to increase the reliability of operation by reducing the pressure of water on the concrete dam and reducing the cost of construction by reducing the consumption of concrete.

FIG. 1 schematically shows a dam, a transverse section; in fig. 2 is a diagram of the forces acting on a known dam; in fig. 3 is a diagram of the forces acting on the proposed design of the concrete: the concrete dam 1 is adjacent to the stone prism 2 with an impervious device 3 (made of ground or non-ground materials), fitting, on the ridge 4 of the concrete dam and with a cementing curtain 5. To drain water from the cavity bounded by an anti-seepage device 3 and the upper edge of the concrete dam 1, pipes 6 are laid in the body of the latter, connecting the cavity to the lower side of the dam. Dotted line 7 shows the profile of a known concrete dam.

The sufficiency of the work of the proposed construction is improved by comparing it with the construction of a known dam.

Shown in FIG. 2, a gravitational known concrete dam 7, is calculated on the action of the total hydrostatic pressure from the upper 8 and 9 lower pools, as well as the weighing 10 and

11 filtration back pressure of water in the base of the structure.

In the proposed construction (Fig. 3), the hydrostatic pressure from the upstream from the ridge mark of the stone-impinging prism to the base of the dam is perceived by the prism itself and, thus, is not transmitted to the upper edge of the concrete dam. In this case, the hydrostatic pressure 12 is higher than the ridge of the rock-backing prism, the lateral pressure 13 of the rough draft is from the ridge of the prism to its base, and the hydrostatic pressure 14 is equal to the lower reach by the hole 6). Since the imperfection filter on the curtain in the proposed dam construction is brought to the upper reach

the base of the concrete dam, then from the side of the base only the weighing will act on it, its back pressure of water 10 corresponding to the level of the lower reach.

Thanks to the presence of a kablonnabrosnoy

the prism decreases pressure on the concrete dam from the upstream side; the lateral pressure 13 of the stone prism and hydrostatic pressure 14, corresponding to the level of the downstream, are lower than hydrostatic pressure 15 on the upstream side, from the ridge level of the prism to the base of the dam.

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Editor Y. Sereda Order 4694/34

VNIIPI USSR State Committee

for inventions and discoveries

1 13035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PSP “Patent, Uzhgorod, st. Design. four

Compiled by N. Kaveshnikov

Tehred I. VeresKorrektor I. .usk

Circulation 641Subscribe

Claims (1)

In the proposed design (Fig. 3), the hydrostatic pressure from the upstream side in the area from the elevation mark of the stone-sloping prism to the dam base is perceived by the prism itself and, thus, is not transmitted to the upper face of the concrete dam. In this case, hydrostatic pressure 12 is transmitted to the concrete dam from the upstream side, above the elevation of the ridge slope, the lateral pressure 13 of the stone outline ranging from the ridge to its base, and hydrostatic pressure 14, corresponding to the level of the downstream (the upper face of the concrete dam communicates with lower down hole 6). Since the antifiltration curtain in the proposed dam design is carried out into the upper pool outside the concrete dam base, only the weighing back pressure of water 10 corresponding to the lower pool level will act on it from the base side. Due to the presence of a rock-filling prism, the pressure on the concrete dam from the upstream side decreases, since the lateral pressure 13 of the stone prism and the hydrostatic pressure 14 corresponding to the level of the downstream are less than the hydrostatic pressure 15 from the upstream side, from the mark of the prism crest to the base of the dam.