摘要:

All examples of soil failure, other than landslides, that could be identified as occurring during the magnitude 7.2 Vancouver Island earthquake of 23 June, 1946 have been documented. Slumping and liquefaction were common and caused a significant proportion of the earthquake related damage. Liquefaction occurred up to a distance of 100 km from the epicenter, a distance that agrees well with a previously established empirical relationship.

ISSN:0008-3674    

DOI:10.1139/t80-011

出版商:NRC Research Press    

年代:1980

数据来源: NRC

摘要:

This paper describes an instrumented impact penetrometer suitable for the measurement ofinsituproperties of soils. The velocity and depth of penetration at any instant are calculated from the deceleration record. Results are presented from a series of tests on a dry sand target for a range of impact velocities up to 12 m/s.

ISSN:0008-3674    

DOI:10.1139/t80-012

出版商:NRC Research Press    

年代:1980

数据来源: NRC

摘要:

Withdrawal of groundwater for depressurization of the "water sands aquifer" under a test pit in the Athabasca Oil Sands of Alberta caused declines in hydraulic heads in two observation wells located 3700 and 6600 m away. Analysis of these declines over a 6 month period by the time–drawdown method indicated transmissivity values of 68 m2/day for both wells. Pumping tests of 24 h duration had previously indicated that transmissivities at the two observation wells were 1.2 and 118 m2/day.Geological assessment of the water sands aquifer revealed that it is discontinuous between the test pit and the observation wells. Variations in lithology and heavy oil saturation as well as relief on the underlying limestone indicate that the water sands aquifer does not meet the "homogeneous and isotropic" criteria necessary for application of the Theis method of analysis. Nevertheless, the excellent fit of the time–drawdown data to the type curve and the identical values obtained for transmissivity indicate that the method can be used for pumping tests of long duration, which reflect conditions over extensive areas of the water sands aquifer.

ISSN:0008-3674    

DOI:10.1139/t80-013

出版商:NRC Research Press    

年代:1980

数据来源: NRC

摘要:

Results of several analyses of two-dimensional problems, carried out to study the effects of small variations in the plasticity parameters on the solution, are presented. Also included are the results of analyses using several different material idealizations usually employed in the structural analysis of openings in geologic formations. The geometric and loading configurations considered are those commonly encountered in underground openings.

ISSN:0008-3674    

DOI:10.1139/t80-014

出版商:NRC Research Press    

年代:1980

数据来源: NRC

ISSN:0008-3674    

DOI:10.1139/t80-015

出版商:NRC Research Press    

年代:1980

数据来源: NRC

ISSN:0008-3674    

DOI:10.1139/t80-016

出版商:NRC Research Press    

年代:1980

数据来源: NRC

ISSN:0008-3674    

DOI:10.1139/t80-017

出版商:NRC Research Press    

年代:1980

数据来源: NRC

ISSN:0008-3674    

DOI:10.1139/t80-018

出版商:NRC Research Press    

年代:1980

数据来源: NRC