Effect of Tidal Fluctuation on the Stability of Estuarine Structures in Sarawak
Several incidents of lateral movement and failures of estuarine structures have been reported in Sarawak. These structures located in very soft and deep sedimentary soils are usually supported on pile foundations. There is a 4 to 7 m daily tidal fluctuation in these locations, the effect of which on the ground and the piles is usually neglected in design. A study has been undertaken to formulate improved approaches for the design of riverine and estuarine structures. The validation of a theoretical model requires data on ground movement and pore water pressure changes due to tidal fluctuation. Accordingly, piezometers and inclinometer casings were installed at the sites of two structures where a bridge and jetty are proposed to be constructed. The inclinometers measure the lateral movement of the river banks and a pile installed in the riverbed. The piezometer and inclinometer readings are being recorded periodically. The paper explains the background of the study, case histories of failures, soil conditions at the two sites, details of instrumentation, results of measurement, and the interpretations.
L. J. Lee, S. R. Kaniraj, and S. N. L. Taib, "Lateral instability of piled riverine structures in the estuaries of Sarawak," in Proc. Soft Soils Engineering Int. Conf., Kuching, 2013.
L. J. Lee, S. R. Kaniraj, and S. N. L. Taib, "Monitoring the ground movement and pore water pressure at the banks of estuaries due to tidal fluctuation," in Proc. Geotechnics for Sustainable Development - Geotec Hanoi 2013, Hanoi, 2013.
E. E. De beer, "Piles subjected to static lateral loads," in Proc. 9th Int. Conf. Soil Mechanics and Foundation Engineering, Specialty Session 10, Tokyo, 1997, pp. 1-14.
N. Morgenstern, "Stability charts for earth slopes during rapid drawdown," Geotechnique, vol. 13, June 1963, pp. 121-131.
P. A. Lane and D. V. Griffiths. "Assessment of stability of slopes under drawdown conditions," J. Geotechnical and Geoenvironmental Eng., vol. 126, May 2000, pp. 443-450.
Z. Zheng, L. Hou, and C. Wu, "Stability of slope which locates on reservoir region and the corresponding influence mechanisms induced by fluctuation of water level," in Proc. Multimedia Technology (ICMT) Int. Conf., Hangzhou, 2011, pp. 4591-4595.
T. Souliyavong, C. Gallage, P. Egodawatta, and B. Maher, "Factors affecting the stability analysis of earth dam slopes subjected to reservoir drawdown," in Proc. 2nd Int. Conf. Geotechnique, Construction Materials and Environment, Kuala Lumpur, 2012.
L. J. Lee, S. R. Kaniraj, and S. N. L. Taib, "Effect of tidal fluctuation on ground movement and pore water pressure," in Proc. Tunneling and Underground Construction, GeoShanghai 2014, Geotechnical Special Publications 242, ASCE, 2014, pp.35-44.
Upon acceptance of an article, the corresponding author on behalf of all authors will be asked to complete and upload the Copyright Transfer Form (refer to Copyright Issues for more information on this) alongside the electronic proof file.
Copyright Transfer Statement for Journal
1) In signing this statement, the author(s) grant UNIMAS Publisher an exclusive license to publish their original research papers. The author(s) also grant UNIMAS Publisher permission to reproduce, recreate, translate, extract or summarize, and to distribute and display in any forms, formats, and media. The author(s) can reuse their papers in their future printed work without first requiring permission from UNIMAS Publisher, provided that the author(s) acknowledge and refer the publication in the Journal.
2) For open-access articles, the author(s) agree that their articles published under UNIMAS Publisher are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0) which permits unrestricted use, distribution, and reproduction in any medium, for non-commercial purposes, provided the original work of the author(s) is properly cited.
3) For subscription articles, the author(s) agree that UNIMAS Publisher holds the copyright or an exclusive license to publish. Readers or users may view, download, print, and copy the content, for academic purposes, subject to the following conditions of use: (a) any reuse of materials is subjected to permission from UNIMAS Publisher; (b) archived materials may only be used for academic research; (c) archived materials may not be used for commercial purposes, which include but not limited to monetary compensation by means of sale, resale, license, transfer of copyright, loan, etc.; and (d) archived materials may not be re-published in any part, either in print or online.
4) The author(s) are responsible to ensure their submitted work is original and does not infringe any existing copyright, trademark, patent, statutory right, or propriety right of others. The corresponding author has obtained permission from all co-authors prior to submission to the journal. Upon submission of the manuscript, the author(s) agree that no similar work has been or will be submitted or published elsewhere in any language. If the submitted manuscript includes materials from others, the authors have obtained permission from the copyright owners.
5) In signing this statement, the author(s) declare that the researches which they have conducted comply with the current laws of the respective country and UNIMAS Journal Publication Ethics Policy. Any experimentation or research involving humans or the use of animal samples must obtain approval from the Human or Animal Ethics Committee in their respective institutions. The author(s) agree and understand that UNIMAS Publisher is not responsible for any compensational claims or failure caused by the author(s) in fulfilling the above-mentioned requirements. The author(s) must accept the responsibility for releasing their materials upon request by Chief Editor or UNIMAS Publisher.
6) The author(s) should have participated sufficiently in the work and ensured the appropriateness of the content of the article. The author(s) should also agree that they have no commercial attachments (e.g. patent or license arrangement, equity interest, consultancies, etc.) that might pose any conflict of interest with the submitted manuscript. The author(s) also agree to make any relevant materials and data available upon request by the editor(s) or UNIMAS Publisher.