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The installation of underground pipelines: effects on soil properties

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Since the 1970s a network of underground pipes, up to 1200 mm diameter, has been installed in the
UK to transmit crude oil to refineries and gas from onshore terminals for distribution. Chosen routes
are subject to significant constraints. Current techniques for pipe installation involve topsoil removal
and storage. Trench depth is set to allow a cover of 1200 mm overburden after pipes have been
installed. The heavy machinery involved results in severe compaction of exposed subsoil. Subsoil is
loosened comprehensively and topsoil replaced. Existing field drains are reconnected, and, if
necessary, new drains with gravel backfill installed. Pipe installation usually takes place between April
and October. Preventative measures to limit compaction during installation are not a practical option.
If subsequent arable crops or grass are poorer or drainage more defective than before disturbance, the
loss is assessed and compensation paid. To determine the cause of the loss >60, investigations have
been made throughout the UK. Soil physical properties were assessed in an open trench using visual
and tactile methods. Consistently, severe compaction in the subsoil was identified as the cause of poor
crop growth or drainage; it was not observed in the topsoil. Specific recommendations for remedial
action were made based on location, depth and severity of the compaction. These included the
installation of additional land drains, increasing the amount of gravel above the drains, or further
subsoil loosening orientated to cross gravel backfill. After appropriate remedial action, net
compensation for crop losses was frequently small or negligible.

Keywords: Soil compaction, pipelines, visual soil examination, land reinstatement

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Ketersediaan

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Informasi Detail

Judul Seri

Soil Use and Management

No. Panggil

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Penerbit

London : British Society of Soil Science., 2015

Deskripsi Fisik

Soil Use and Management, March 2015, 31, 60–66

Bahasa

English

ISBN/ISSN

doi: 10.1111/sum.121

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

March 2015, 31, 60–66

Subjek

ILMU TANAH PERTANIAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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