SU1537745A1 - Antiseepage arrangement for earth dam - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to improve the reliability of the facility by reducing the values of the output pressure gradients when the filtration flow from the air element to the filter. The soil dam impervious device consists of a waterproof element made of soil material. A filter with block 3 adjoins the element on the side of the lower pool. Block 3 is laid in places of elevated values of output pressure gradients. Block 3 is made of a material with the filtering coefficient (K ^b f) equal to (0,8 ÷ 0,9) K ^e f≤K ^b f≤ (2 ÷ 5) K p ^e, where R ^e f - filtering factor impervious element . Provision is made for non-suction block of material with a deformation modulus equal to the modulus of deformation of the soil of the inert element. The non-suffusion block is located in the places of the waterproof element, where the values of the output pressure gradients are J _out , where J _out is the permissible value of the output pressure gradient. 1 hp f-ly. 2 Il.

Description

figure 1

The invention relates to hydraulic engineering construction and can be applied in the construction of energy, irrigation and waterworks power plants, as well as dams, industrial hydraulic engineering objects: tailings, sludge collectors and industrial stocks of wastewater.

The purpose of the invention is to increase the reliability of work by reducing the values of the output pressure gradients when the filtration flow leaves the waterproof element in the filter.

Figure 1 shows an anti-filtering device with a water-resistant soil element and a filter adjacent to it from the bottom of the pool, equipped with a block of unsupported material; FIG. 2 shows a filtering device using a dam body as a waterproof element.

The soil dam impervious device includes a water-proof element 1 made of soil material and a filter 2 adjacent to it from the downstream, equipped with a block 3 of non-suffusion material that is laid instead of the soil of water-pressure element 1 at elevated values of output pressure gradients at the output of the filtration stream from the waterproof element 1 to the filter 2.

Block 3 is made of a material 35 with significant adhesion (porous concrete, asphalt concrete, polymeric materials, etc.), which allows it to withstand the action of elevated values of output pressure gradients without manifestation of filtration deformations (suffixes, contact bulging,

and

T TAOP

1ВЫ i ул J

I-Bbit - valid

It is time ieb0l- 1-, where the value of the output pressure gradient according to the conditions of the filtration strength of the soil of the inert element.

Performing block 3 in the area where i

- AOP

. IBWX Out, allows you to set

the required size of it depending

ton.

from

Laying of the block 3 in those places of the waterproof element, within which the values of the output pressure gradients 1Вых I, increases the filtration resistance of the waterproof element due to the fact that the soil area of the latter, in which the values of I exceed the allowable

I value

ft °

ft

replaced by block from

with the coefficient filtere. , cS

unsupported material. Outside the laying areas of the unsupported

ST -rt D ° P

unit 3 1v tbykh t-e-Satisfy the condition of ensuring the filtration strength of the soil of the impermeable element and, consequently, increase the reliability of the operation of the structure.

Claims (2)

1. A soil dam anti-filtration device, comprising a waterproof element of ground material and a filter adjacent to it from the downstream, characterized in that, in order to increase reliability of operation by reducing the output gradient values of the head when the filtration flow leaves the waterproof element in the filter, watertight element in places of values of output pressure gradients (16I) exceeding the allowable value of output pressure gradient according to the conditions of filtration strength of the soil (mA V ho that waterproof element exfoliation radios (K5F) equal to (0, 8-0, 9) K $ K «6 / Э ТЭIT - гЈ (2-5) К ,,, where К, is the filter coefficient 45 more completely in the form of a block of non-suction-grounding of the soil of the impermeable element. material with a filter ratio; Filtering device (K) satisfying the condition provides for the implementation of block 3 (0.8–0.9) Kq, (2-5) K, where К „, from material with a strain modulus; soil filtration coefficient water equal to the modulus of soil deformation water. thrust element. In impervious devices, it is also envisaged to lay the non-suffusion block in those places of the waterproof element, within which the values of the output gradients are 55 thrust element. 2. The device according to p. Is distinguished by the fact that the non-suction block is made of a material with a deformation modulus equal to the deformation modulus of the soil of the water-resistant element. T TAOP 1ВЫ i ул J I-Bbit - valid It is time ieb0l- 1-, where the value of the output pressure gradient according to the conditions of the filtration strength of the soil of the inert element. Performing block 3 in the area where i - AOP . IBWX Out, allows you to set the required size of it depending ton. from Laying of the block 3 in those places of the waterproof element, within which the values of the output pressure gradients 1Вых I, increases the filtration resistance of the waterproof element due to the fact that the soil area of the latter, in which the values of I exceed the allowable I value ft ° ft replaced by block from unsupported material. Outside the laying areas ST -rt D ° P unit 3 1v tbykh t-e-Satisfy the condition of ensuring the filtration strength of the soil of the impermeable element and, consequently, increase the reliability of the operation of the structure. Invention Formula 1. A soil dam anti-filtration device, comprising a waterproof element of ground material and a filter adjacent to it from the downstream, characterized in that, in order to increase reliability of operation by reducing the output gradient values of the head when the filtration flow leaves the waterproof element in the filter, watertight element in places of values of output pressure gradients (16I) exceeding the allowable value of output pressure gradient according to the conditions of filtration strength of the soil (mA V ho that waterproof element  in the form of a block of non-suction material with a filtration coefficient (K) satisfying the condition (0.8–0.9) Kq, (2-5) K, where К „, is the filtration coefficient of the ground water thrust element. 2. The device according to p. Is distinguished by the fact that the non-suction block is made of a material with a deformation modulus equal to the deformation modulus of the soil of the water-resistant element. 7 56 W ea /// /// /////////////////////////// C and G. 2