SU1656054A1 - Drain - Google Patents

Abstract

The invention relates to land reclamation and hydraulic engineering construction, can be used in land reclamation in the construction of horizontal drainage, especially in poorly permeable cohesive soils, and allows increasing the water intake capacity of the drainage and thereby reducing the cost, increasing the efficiency and reliability of the drainage operation. Drainage includes drainage trench 1, drainage device, filtering material (soil) 3 and trench backfill 4. Drainage device 2 contains two drainage pipelines 2 laid parallel to each other along the walls of drainage trench 1. The space between pipelines 2 is at least half the height their diameter is filled with calibrating material 3 Groundwater enters the drainage pipelines 2 through the walls and bottom of the drainage trench 1 and the filtering material (soil) 3.1 hp f-ly, 1 ill. Yo

Description

ABOUT

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The invention relates to land reclamation and hydraulic engineering construction and can be used in land reclamation in the construction of horizontal drainage, especially in poorly permeable cohesive soils.

The purpose of the invention is to reduce the cost and increase the efficiency and reliability of drainage in low-permeable soils.

The drawing shows the drainage.

Along the walls of the drainage trench 1 laid drainage pipelines 2, the space between which is filled with soil or filter material 3, and on top - trench backfill 4.

Drainage works as follows.

During the construction of drainage in interconnected soils, as a result of the destruction of the pore structure of the soil by the working unit of the drainage bin, the water permeability of the trench backfill is reduced, which impairs the water intake capacity of the drainage. In this case, in order to increase the water intake capacity of the drainage, it is recommended to increase the contact area of the drain with the soil of the undisturbed structure.

When placing the drainage pipelines 2 along the walls of the drainage trench 1, the area of their contact with the soil of the undisturbed structure increases. Ground water enters the drainage pipelines 2 through the walls and bottom of the drainage trench 1 and filter material 3.

During the construction of drainage in the lungs, according to the meso-composition of non-connected and poorly coupled soils, the space between the drainage

the pipelines are filled with soil removed from the trench. In this case, the permeability of this soil is higher than the permeability of the soil of the undisturbed structure and it serves as a filtering material, increasing the water intake capacity of the drainage.

The filling of the space between drain pipelines with soil is carried out simultaneously with the laying of pipelines 2 on the bottom of trench 1.

The selection of the diameter of the drainage pipelines is carried out by means of a hydraulic calculation from the condition of each half of the maximum drain flow.

Claims (2)

1. Drainage, including a drainage trench, drainage device, filtering material and trench bedding, characterized in that in order to reduce the cost and increase the efficiency and reliability of drainage in low-permeable soils, the drainage device is made in the form of two drainage pipelines laid parallel to each other friend / along the walls and bottom of the drainage trench with the possibility of contact with the latter, and the space between the pipelines is filled with filtering material to a height of at least half their diameter. 2. Drainage according to claim 1, characterized in that, as a filtering material, bulk material, such as ash and slag, is used to fill the space between the pipelines.