SU1802044A1 - Drainage system construction method - Google Patents

Description

The invention relates to the field of land reclamation. namely, for draining wetlands in the presence of closed relief depressions.

The aim of the invention is to improve the reliability of the system and simplify the installation of wells-water absorbers.

This goal is achieved by the fact that tees are installed between the pipeline links at the installation sites of water-absorbing wells during the laying of the pipeline, a flexible perforated pipe is connected to each of them, the end of which is brought out to the soil surface, a filter column is made around it and a trench is filled up, after which the boundary of the filter column is torn off a pit, in which a well is installed and, at the same time, swampy lands in the presence of closed depressions. The essence of the invention: the installation of wells, water absorbers is performed in two stages. At the first stage, when laying the collector pipeline between its links, a tee equipped with a flexible pipe is installed between its links at the well picket, the top of which is brought out above the soil surface, and a filter column is made around the pipe. At the second stage (after stabilization of the GWL), next to the filtering column, a pit is torn off in the drained soil, into which a perforated body of a well with a filter is installed and connected to the collector pipeline through a perforated pipe. 2 ill. _ ω With the creation of the filter, a flexible pipe is connected to the well.

The difference between the proposed technical solution from the prototype and other technical solutions in this area lies in the fact. that when approaching the picket, the well is installed on the entire well, but only a tee equipped with a perforated flexible pipe, around which a filter column is made. Moreover, the tee, docked with the pipeline, and the filter column are placed directly into the trench. The installation of the body of the well and its connection is carried out after backfilling of trenches and the initial drainage of the waterlogged depressions of the relief, laid there by a drainage network, in a hole made next to the filtering column.

1802044 A1

A tee with a branch pipe extending to the surface of the soil, placed in a trench during the laying of the pipeline, allows you to avoid the removal of liquefied soil into the collector-drainage network during the period of work on installing a well, which is almost inevitable in the known technical solution, since water flowing from the overlying area along pipeline, it is drained into a pit for installing a well, here it is enriched with suspended soil particles and then enters the underlying discharge network. Shutting off the pipeline in order to reduce the flow of water into the pit may aggravate the process of siltation of the collector-drainage network above the pit.

Installing the well body some time after laying the drainage and making a filter column tee around the perforated branch pipe eliminates drainage from the pit in which the well body and filter will be placed, since the pit is torn off in the already dried soil, and also thanks to the filter column, water is discharged through it into discharge network, while the pit is draining and the removal of liquefied soil into the collector-drainage network is excluded.

The use of flexible perforated pipes and their output to the soil surface allows not only to avoid the removal of liquefied soil into the collector-drainage network during the construction period, but also to easily find the place of installation of wells, as well as to simplify their connection to the waste collector-drainage network and reduce damage to the connection points wells to the collector-drainage network by tangential frost heaving forces and gravity forces.

Example. With a known mechanism, for example, an ETC 202 A. excavator, trenches are torn off and drainage pipelines (collectors or drains) are laid in them, which are manually or with the help of known devices sprinkled with a humus layer 15-20 cm thick. tees are installed with pipeline links, to each of which a flexible perforated pipe is connected, the end of which is brought out to the soil surface, and immediately around the tee a filter column is made to the soil surface. The final backfilling of trenches is done with bulldozers. After that, preferably after some time sufficient to drain the drained soil layer, next to the filtering column, a well is torn off using a known device, for example, an excavator, a pit into which the perforated body of the well is lowered, it is connected with a flexible pipe to the waste pipeline. Filters around the body of the well and the tee are preferably made of bulk material, for example, from a gravel-sand mixture, so that reliable contact is obtained between them.

Claims (1)

Claim A method for the construction of drainage systems, including a trench fragment, laying pipelines of a collector-drainage network, a fragment of pits at the pickets of wells and installing water-absorbing wells in them, connecting wells to a collector-drainage network, making filters around wells, backfilling trenches and pits, characterized in that, in order to increase the reliability of the system and simplify the installation of water absorbent wells. at the pickets of the installation of water-absorbing wells, simultaneously with the laying of the pipeline, tees are installed between its links, a flexible perforated pipe is connected to each of them, the end of which is brought out to the soil surface, a filter column is made around it and a trench is filled up, after which a hole is torn off at the border of the filter column, in which a well is installed, and simultaneously with the creation of a filter, a flexible pipe is connected to the well.