Foundation problems in Champlain clays during droughts. II. Case histories

Autor:	V. Silvestri, G. Sarkis, Jean Lafleur, N. Bekkouche, Michel Soulié
Rok vydání:	1992
Předmět:	Hydrology Moisture Settlement (structural) Foundation (engineering) Elevation Geotechnical engineering Geotechnical Engineering and Engineering Geology Reinforced concrete Block (meteorology) Water content Monitoring program Geology Civil and Structural Engineering
Zdroj:	Canadian Geotechnical Journal. 29:169-187
ISSN:	1208-6010 0008-3674
DOI:	10.1139/t92-021
Popis:	This paper presents the results of a 3 year monitoring program of the volumetric water content in two clay deposits on Montréal Island. The water content was monitored by means of a neutron depth moisture probe, which was lowered down in a series of 3–6 m deep, permanently installed, aluminium access tubes. These tubes are located at various distances from deep-rooted trees on two experimental sites. On the first site, a two-storey reinforced concrete building, surrounded by four rows of 15–20 m high silver maples, has suffered a differential settlement of over 150 mm. On the second site, a three-storey apartment block, surrounded on two sides by a row of 5–10 m high maples, has suffered a differential settlement of about 50 mm. The paper analyses the volumetric water content variations and compares them with both the rainfall deficits calculated for the period of observation and the elevation profiles of the building foundations. In addition, a comparison is made between the observed damages and a classification proposed by the Building Research Establishment of England. Key words : volumetric water content, trees, settlement, distortions, clay deposits, seasonal variations, damages.
Databáze:	OpenAIRE
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