Correction Factor on Dynamic Force in a Marsh Funnel Test for Tunneling

Correction Factor on Dynamic Force in a Marsh Funnel Test for Tunneling

Zheng, Dongzhu (Universiteit Gent)
Bezuijen, Adam (Universiteit Gent)
Talmon, A.M. (TU Delft Offshore and Dredging Engineering)

2022

This paper presents an improvement on a previous model for predicting the Marsh funnel (MF) test that is used in slurry shield tunneling for evaluating the rheological properties of bentonite slurries. The improvement focuses on the prediction of the dynamic part for fluids with small MF times. The velocity profile of the Herschel-Bulkley fluid in a laminar pipe flow condition is first investigated and a correction factor is introduced in the improved model. Comparisons of results from experiments and calculations with the previous model confirm the improved performance over the existing model. The rheological parameters obtained from the improved model show good resemblance to those obtained from a laboratory viscometer. The work also provides a reference to similar applications such as fluid transportation through pipelines where dynamic pressure dominates and therefore should be correctly predicted considering its velocity profile in a laminar condition.

Bentonite slurry
Correction factor
Field use
Marsh funnel test
Rheology

http://resolver.tudelft.nl/uuid:66369ec6-8034-4a0f-aefb-e9b1a9057714

https://doi.org/10.1061/(ASCE)GM.1943-5622.0002439

2023-07-01

1532-3641

International Journal of Geomechanics, 22 (9)

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 Dongzhu Zheng, Adam Bezuijen, A.M. Talmon