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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Due to the short supply of conventional fill materials, such as sand, land reclamation using dredged marine deposits has recently been proposed, in which marine deposits with high water content are blow-filled into reclaiming areas. The strength development of the filled marine soils is of great importance during the sedimentation and consolidation to guide the filling process and construction of reclamation. In this study, a novel sensor based on optical frequency domain reflectometry (OFDR) technology with a simple design was developed for undrained shear strength measurement. The novel sensor consists of an optical fiber and a series of polyoxymethylene coins. Owing to the merits of OFDR technology on high resolution, fully distributed sensing, and immunity to electromagnetic interference, the novel sensor can be used to determine undrained shear strength profiles of very soft to soft marine sediments/soils with good accuracy. The sensor was calibrated in remolded marine deposits with different water contents. The good feasibility and performance of the novel sensor for undrained shear strength measurement were well validated in two physical model tests on marine deposits treated by horizontal drains with vacuum preloading.

Details

Title
A Novel Sensor for Undrained Shear Strength Measurement in Very Soft to Soft Marine Sediments Based on Optical Frequency Domain Reflectometry Technology
Author
Pei-Chen, Wu 1 ; Wen-Bo, Chen 1 ; Jian-Hua, Yin 2 ; Pan, Yu 1 ; Lou, Kai 1 ; Wei-Qiang, Feng 3   VIAFID ORCID Logo 

 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China; [email protected] (P.-C.W.); [email protected] (W.-B.C.); [email protected] (J.-H.Y.); [email protected] (Y.P.); [email protected] (K.L.) 
 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China; [email protected] (P.-C.W.); [email protected] (W.-B.C.); [email protected] (J.-H.Y.); [email protected] (Y.P.); [email protected] (K.L.); Department of Civil and Environmental Engineering, Research Institute of Land and Space, The Hong Kong Polytechnic University, Hong Kong, China 
 Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510000, China 
First page
5530
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
14248220
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2700779769
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.