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February 2021

When the going gets tough

Soil grouting is a challenge for water pumps

If the soil body on a construction site is to be consolidated, high-pressure injection is often used. This is a procedure that requires the removal of a large amount of cement suspension - which quickly causes many pumps to fail.

This was the experience of a construction crew in Cologne, Germany, who wanted to use the soil grouting method to grout the floor. They relied on cantilever pumps to remove the liquid residues. This was a wise decision, because such pumps are quite suitable for swampy applications with high solids content and low immersion depths. In special civil engineering, however, they quickly reach their limits. In the case described, the pumps lasted only a few weeks. The highly abrasive pumping medium was so hard on them that a more economical solution had to be found.

In the process, also known as jetting, the soil is mixed with a binding agent, usually a cement suspension, under high pressure until a solidified soil mass is produced. It is used for deep foundations, underpinning or sealing bases for sheet piles. At several hundred bars of pressure, the self-hardening binder shoots out of the drill pipe into the working area. Loosened soil pushes to the surface with the excess cement suspension and must be removed. The resulting volume is considerable and amounts to several times the worked soil space.

Cement suspensions on a construction site in Cologne, Germany: long service lives are possible with heavy sand pumps such as those from Tsurumi (Photo: Tsurumi)
За допълнителна информация, моля, свържете се с:
Биргер Шмид, Маркетинг
Tsurumi (Europe) GmbH
Wahlerstr. 10
40472 Дюселдорф
Германия
Тел: +49 211 417 9373
Факс: +49 211 479 1429
Имейл: sales@tsurumi.eu

Tsurumi е един от най-опитните производители на помпи в света. От модерната си фабрика в Киото, Цуруми произвежда повече потопяеми помпи в света на година от всеки друг производител на помпи. Понастоящем има над 1800 различни модела помпи в гамата на Цуруми, включително полу-vortex, vortex, незапушващи се, режещи, контракторни и обезводняващи, за канализационни и отпадни води, аератори и вентилатори, декантиращи агрегати и скимери. Tsurumi работи в световен мащаб с широка дилърска мрежа в Европа, Северна и Южна Америка, Азия, Австралия и части от Африка.
www.tsurumi.eu