Experimental study on deposition effect of Fe-based grouting inducers in silts

DOI

10.2991/imst-16.2016.46How to use a DOI?

Keywords

Fe-based grouting; deposition filling; CT scan; small-scale shaking table.

Abstract

This paper presents the Fe-based biological grouting in silt foundation to improve its engineering characteristics. The growing and enzyme activity of iron bacteria are measured. The effects of temperature and pH on the amount of Fe-based products are studied. The components of Fe-based deposits are investigated. Small-scale grouting testes are carried out and the distribution and variation of spatial pores in non-grouted and grouted silts are studied by CT scans. The filling effect of grouting is evaluated by small-scale shaking table tests on silt slope. The results show that Fe-based precipitations mainly consist of schwertmannite and had a small amount of crystal mineral Fe5(PO4)4(OH)3-2H2O. The deposits can fill the pores, leading to a reduction of porosity from 27.3% (non-grouting) to 10.2% (five-time grouting). The Fe-based deposit can effectively restrain the amplification effect of soil on the seismic waves. The proposed biological grouting method has application potential for the reinforcement of silt foundation.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zhaoyang Xu
AU  - Tingchun Bai
AU  - Jianzhang Huang
AU  - Yishan Pang
AU  - Feng Zhou
PY  - 2016/11
DA  - 2016/11
TI  - Experimental study on deposition effect of Fe-based grouting inducers in silts
BT  - Proceedings of the 2016 International Conference on Innovative Material Science and Technology (IMST 2016)
PB  - Atlantis Press
SP  - 314
EP  - 321
SN  - 1951-6851
UR  - https://doi.org/10.2991/imst-16.2016.46
DO  - 10.2991/imst-16.2016.46
ID  - Xu2016/11
ER  -