Stress distribution below pavements under trolley bus loadings

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AbstractIncidental to an investigation of the causes of rapid detcrioration of pavements under Trolley Bus Loadings in the City of Edmonton a comprehensive series of stress measurements in the sub-soil was undertaken. The project was commenced in 1948 in cooperation with the National liesearch Council of Canadaand the City Engineer's Department. The stress distribution below both rigid and flexible pavements under normal traffic loadings was investigated. The effect of dynamic forces was also assessed. Stresses were measured with U. S. Waterways Esperiment Station pressure cells using automatic recording equipment. The data indicate that the pressure distribution below the flexible pavement was in close agreement with that computed by the Boussinesq equations of the elastic theory. This is also true of the pressure distribution below the rigid pavement if the thickness of concrete pavement is replaced by an equivalent thickness of soil obtained by multiplying the concrete slab thickness by a constant factor. The effects of impact, braking and acceleration forces were small compared to the stresses produced by static loads.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number6906
NPARC number20358894
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Record identifier1b66ef10-283a-4535-bae7-78c923faa32c
Record created2012-07-20
Record modified2016-05-09
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