RU1812268C - Method of constructing leader drain - Google Patents

Abstract

Usage: in reclamation construction with the device leader, water-lowering drain. The inventive method can drastically reduce the cost of building leader drains in water-saturated soils, carry out drainage without the use of drainage materials by means of a drainage conduit, laid from the bottom to the plant layer in the form of a inverse filter, from a trench, centrifuged with sieving, developed during tearing according to the fractional composition of mineral soil with the simultaneous formation in the bottom of the cavity of the conduit by pulling the half-cylinder at a speed equal to the speed of the fragments trenches. 4 ill.

Description

The invention relates to land reclamation and can be used in the construction of dewatering drains.

The purpose of the invention is to reduce the cost of constructing drainage by saving drainage materials.

Figure 1 shows the operation of the fragments of the drainage trench and the device of the conduit from the centered mineral soil, rear view; in Fig.2 - node I in Fig.1 (after laying the centered mineral soil in the form of a return filter with a cavity of the conduit at the bottom of the trench); Fig. 3 is a side view of the formation of a leader drain; Fig. 4 is a sectional view of a centrifugation and sieving process for the fractional composition of mineral soil. The method of building leader drains involves the following process operations;

cutting along a strip with a depth of 0.2-0.7 m of a vegetative soil layer,

an excerpt of a drainage trench with the supply of developed mineral soil to the transverse conveyor of the drainer, transferring it to a longitudinal conveyor and to a centrifuge for sieving with a dump in fractions into a trench along the bottom of which a half-cylinder is drawn.

The construction of leader drains is carried out for preliminary (short-term) lowering of the groundwater level before the start of work on the installation of the main long-term (for 50 years) drainage. Leader drainage performs the function of draining, and its estimated duration is from 7 to 35 days.

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A method for building leader drains is as follows.

Transverse and longitudinal strokes of the bulldozer cut the vegetative soil layer (depth from 0.2 to 0.8 m). Set the drainage machine 1 and start from the collector a fragment of the drainage trench 2, The developed mineral soil by the working bodies 3 of the drainage machine 1 is fed to its transverse 4, and then the profile 5 conveyors, from which the soil enters the centrifuge 6. Center the soil, at the same time sift it in fractional composition by means of radially installed fork surfaces 7, decreasing downward in their diametrical circles and the distance between adjacent bars (downward the fork bars thicken each other), which is produced mineral soil sieving t 8 fractions; The centrifuged and fractionally dispersed mineral soil 8 is laid in a drainage trench 2, dumped through a hopper 9 without a back wall onto the former 10, to form a cavity of the water conduit 11, intended for groundwater drainage. The structure of the laid separate trench up to the plant soil layer is made in the form of a return filter.

The process of arranging a leader drain and the formation of a water conduit from the developed mineral soil 8 is carried out simultaneously (synchronously) with a fragment of the trench 2. The fractioned soil between the walls of the bunker 9 of the drainer 1 is placed and laid in trench 2 on the former 1 (ski with flexible hitch-cable), in this case, at the bottom of the trench, the cavity of the water conduit is in the form of a half-cylinder for the discharge of groundwater. No other drainage materials are used to create leader drain drains. Consequently, the leader drain device

It consists only of the cost of a machine-shift of a working drainer.

When combining the axes of the leader and the main drain (double drain of the drain), they COB fall along their cross section, and when spaced apart, when the leader is separate from the main drain / the distance between them is from 0.7 to 3.0 m along the axis, depending on the width of the crawler track of the drainer and the filtration properties of soils.

When forming a water conduit strip, short-term stability of its design is ensured by:

internal adhesion and friction between lumps of mineral soil;

external adhesion forces, including adhesion when they are pressed to each other from above by a mass of soil in a trench, and from below

a cavity shaper creating lateral proppants of pressure, forming a strong construction of the conduit cavity:. .

Thus, this method of building leader drain compared with the prototype provides a decrease in the cost of constructing drainage by saving drainage materials.

Formula of the invention

A way to build leader drains, -. including cutting of plant soil along the route, a fragment of the drainage trench, laying a drainage conduit into it and backfilling with the developed mineral

soil, characterized in that, in order to reduce the cost of construction by saving drainage materials, the developed mineral soil is first subjected to centrifugation with

sifting according to fractional composition, they fall asleep in the trench in the form of a reverse filter, and a drainage conduit is formed by pulling the semicylinder along the bottom of the trench at a speed equal to the fragment speed

trenches.