SU397593A1 - DEVICE FOR THE PRODUCTION OF SANDY DRAINS - Google Patents

Description

one

The invention relates to the field of creating artificial bases, namely, devices for the manufacture of sandy drains, and can be used in the construction of various structures on weak water-saturated mud soils, etc.

There are known devices for making sand drains in weak, water-saturated soil such as sludge, etc., including a casing with a lost shoe. However, they do not provide an increase in the effective radius of action of drains and the possibility of making vertical and clonal drains of varying height across sections.

The invention eliminates these disadvantages.

This is achieved by the fact that an outer screw blade is attached to the front of the casing, and a drive shaft mounted on the length of the blade blades located in the cavity of the casing, and the lower part of the drive shaft has a screw-type spiral independent drive with adjustable rotation speed.

The drawing shows the proposed device in section.

It has a casing 1, in the lower part of which an external screw vane 2 is attached, and a loose shoe 3. In the cavity

2

the casing 1 is mounted a drive shaft 4 with inclined blades 5 arranged along its length.

The idler shaft 4 in the lower horse is equipped with a screw-type helix 6, which is designed to push and compact the sand.

In the case of forming variable-sectional drains, the drive shaft 4 is mounted on a self-driving drive with an adjustable rotational speed (not shown).

The device works as follows.

The casing pipe 1 is immersed in the ground to the npoeKTHoii mark by screwing it, then sand is fed through the open upper end of the pipe and the shaft 4 is inserted. The achievement of the required rotational speed of the drive shaft 4 is performed by unscrewing the casing 1. The density of the drain and its cross section is governed by the ratio of the speed of unscrewing the device and the speed of pressing in the sand drain.

Subject invention

An apparatus for making sand drains in a weak water-saturated lamella type sludge and

.3

(P., including a casing with a lost shoe, characterized in that: in order to increase the effective radius of action of drains and to prevent vertical and inclined wood, the outer screw of the blade is attached to the lower part of the casing, and in Iolosty of the casing pipe there is mounted a 1-wheel drive shaft with inclined timbers located along its length.

moreover, the lower part of the drive shaft is spiral welded to the neck type.

2. Device - by. 1, characterized in that, in order to provide the possibility of making sand drains of variable; according to the section height, the drive shaft is independently driven; With an adjustable rotation speed.