SU1664964A1 - Method for constructing drainage system - Google Patents

Abstract

The invention relates to land reclamation and can be used for the construction of drainage systems in areas with a groundwater level above the drainage depth. The purpose of the invention is to increase construction efficiency by reducing labor and capital costs. Leader drain 1 is laid using a trenchless type draining machine below the groundwater level of GWL ₁ — the initial one, but above the laying level of the main drainage 2, which is laid after lowering the groundwater level from the groundwater table to GWF ₂ — technological. Drain 2 is packed with filter dusting 3 and backfilling with soil 4. In water-saturated soils, the construction of drainage is carried out in two stages. The trenchless type trencher at a distance of no more than 3.0 m from the main drain axis lays the leader drainage drain. After an aging of several days, drainage is applied to a predetermined amount by a trench-type draining machine. 1 il.

Description

The invention relates to land reclamation and can be used for the construction of drains mainly in areas with a groundwater level higher than the drainage depth.

The purpose of the invention is to increase construction efficiency by reducing labor and capital costs.

The drawing shows the leader drain 1, laid using the trenchless method below the groundwater level of the groundwater source GHG1 — the original, but higher than the basement level of the baseline 2, which is folded after lowering the groundwater level from the groundwater level to the groundwater level, technological. Drain 2 is laid with filter dusting 3 and backfilling with soil 4.

In order to determine the depth of the groundwater levels before the start of construction, every 250 m of the main drainage route at a distance of 2.5, 3.0, 3.0 m, on each side of it, temporary observation wells are drilled to the depth of the main drainage and determined The location of the groundwater level. In water-saturated soils, the construction of drainage is carried out in two stages by a trenchless type trencher at a distance of no more than 3 m from the main drainage axis, laying the leader drainage drainage system.

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Well, from pre-protected plastic pipes to a depth above the base level of the main drain. The depth of the leader drainage drainage is determined depending on the level of groundwater and the physical composition and condition of the soil. For example, GWL-i — the initial one is at a depth of 1 m from the ground surface, the main drainage depth is 3.0 m, while the GWG — design is 2.5 m. , 0 m, which provides UHV2 - technological in the area of the drain 2.0 m for 20-25 days. Observations were made on temporary observation wells located along the construction of the drain path. After reducing the groundwater table from initial to technological

the drainage is laid in a known manner, for example, an ETC-406A draining machine, which stably operates when the GWL is above the bottom of the drainage trench 0.5-1, Ohm.

Claims (1)

Claim Method A drainage construction method comprising a passage of a leader drain and a main drain lining, characterized by the fact that | after lowering the groundwater to the level of the leader drain, the main drainage is laid at the design depth. W / /// / Y /// /// /// y / /// /// /// //. GWH} original UG82 technological U / # 3 project