Date
07 May 1984, 11:30 am - 6:00 pm
Abstract
Loading tests on 865 mm diameter plates showed that the fractured chalk was much more compressible than at other sites on the same deposit but it was still considered that slab foundations would be adequate for the bridges at most locations. Detailed measurements have been made on one of the bridge abutment foundations both during and following construction. Measurements were made of vertical pressures applied to the ground, lateral earth pressures acting on the abutment wall, settlements of the foundation slab, tilt of the wall, and vertical displacements in the ground below the foundations. These observations confirmed the adequacy of slab type foundations for simple single span highway bridges founded on highly fractured chalk. Values of deformation moduli back analysed from the measurements on the bridge foundation were in reasonable agreement with the values obtained from loading tests on 865 mm diameter plates at the bridge site and the low values obtained at another local site. The values back analysed from the bridge measurements were however much lower than those determined from a large tank loading test and 865 mm diameter plate tests on the same grade of chalk in another part of the deposit.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
1st Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1984 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Marsland, A. and Butcher, A. P., "Behaviour of Bridge Abutment on Fractured Chalk" (1984). International Conference on Case Histories in Geotechnical Engineering. 4.
https://scholarsmine.mst.edu/icchge/1icchge/1icchge-theme1/4
Behaviour of Bridge Abutment on Fractured Chalk
Loading tests on 865 mm diameter plates showed that the fractured chalk was much more compressible than at other sites on the same deposit but it was still considered that slab foundations would be adequate for the bridges at most locations. Detailed measurements have been made on one of the bridge abutment foundations both during and following construction. Measurements were made of vertical pressures applied to the ground, lateral earth pressures acting on the abutment wall, settlements of the foundation slab, tilt of the wall, and vertical displacements in the ground below the foundations. These observations confirmed the adequacy of slab type foundations for simple single span highway bridges founded on highly fractured chalk. Values of deformation moduli back analysed from the measurements on the bridge foundation were in reasonable agreement with the values obtained from loading tests on 865 mm diameter plates at the bridge site and the low values obtained at another local site. The values back analysed from the bridge measurements were however much lower than those determined from a large tank loading test and 865 mm diameter plate tests on the same grade of chalk in another part of the deposit.
