SU866046A1 - Arrangement for forming vertical counter-filtration curtain - Google Patents

Description

(54) DESIGN FOR EDUCATION OF VERTICAL ANTI-FILTER CURTAIN

I

FIELD OF THE INVENTION The invention relates to hydraulic engineering construction and can be used on earth dams.

A device is known for forming Tpatffliefl under an anti-filtration veil, including a shock action mechanism with protrusions on the body, made in the form of wedge-shaped knives, as well as guides with paegmy, onto which protrusions of a shock action mechanism sh move.

However, this device has insufficient performance due to the precariousness of pre-punching strictly vertical squiggles at a fixed distance from each other, installing and then removing the grooved guides. The installation and direction of the well in pre-drilled wells becomes more difficult when working in water-saturated soils due to the instability of the walls of the wells. If the guides deviate from the vertical position, the knives can exit from the right-hand side of the knives or jam them.

It is also known a device for making sand drains, which includes a casing with a loading window, a self-opening shoe with flaps closing a ring at the end of the casing, a guide, a vibrator and a winch G21.

However, before each dive, it is necessary to close the valves and secure them with a ring, which at the beginning of the ascent

10 casing remains at the bottom of the well. In addition, the tip may not be opened due to the ring being locked on the collapsed flaps when immersed.

1 $

The purpose of the invention is to simplify the production technology, increase productivity and improve the quality of the work.

This goal is achieved by

20 that the casing pipe is rectangular in cross section, expands upwards and is provided with a wedge-shaped and a tip, on the side faces of which rectangular windows 25 are covered with sash hinged at the bottom of the window.

FIG. 1 schematically an image of the proposed device, a general view; FIG. 2 is a section A-A in FIG. 1} 30 in FIG. 3 - tip work with

immersing 8 soil and extracting from it.

The device for forming a vertical anti-seepage curtain consists of a casing 1 of a rectangular shape, which extends upwards and is reinforced by internal stiffening ribs 2 with cutouts in them. The casing pipe 1 is open at the top and the bottom is provided with a wedge-shaped tip, on the side faces of which rectangular windows are made, covered with shutters 3. The hinges are hung at the bottom of the window, which ensures their independent closing when the casing is immersed and opened extracted from the ground. The casing pipe 1 is fixed on the vertical guide 4, which is mounted on the base of the tractor 5. A vibroplotter b is installed at the top of the casing, which serves to insert the pipe into the ground. The winch 7 mounted on the tractor is designed to remove the casing 1 from the ground.

The device works as follows.

In order to form the impervious curtain under the action of the vibrator 6, the casing pipe 1 is inserted into the ground, and the shutters 3 are raised upwards due to the resistance of the soil and block the windows in the walls of the wedge-shaped tip (Fig. 3, 1-H). After immersion of the subsurface pipe 1 to a predetermined depth, a liquid anti-filter material is poured into its internal cavity, such as clay slurry or heated organic in the ground. A winch 7 casing pipe is removed from the ground. Lifting the casing is facilitated by the fact that it has an expansion upwards, which contributes to the formation of a slot in the ground with sealed smooth walls.

Under the action of the pressure of the liquid impervious material poured into the casing 1, and the engagement of the sash in the ground behind the walls of the flap 3 is lowered downwards. The anti-seepage material flows out of the tip through open windows into an empty slot in the ground when the casing is lifted to form an antifiltration curtain (Fig. 3, II O.

“O After lifting the casing to the surface, the installation is disconnected by a distance equal to the width of the casing pipe and performs the adjacent section of the impervious curtain.

15 The invention can be used to create anti-filtration curtains in the earth dams, to avoid filtering water through them or lowering the level of

2Q depression curve, which allows to increase the stability of dams or reduce their width.

Claims (2)

1. USSR author's certificate 514062, cl. E 02 D 17/00, 03/23/73. , 2. USSR author's certificate   502086, cl. E 02 D 5/38, 02.11.73 (prototype).