气候变化领域集成服务门户(CCPortal): Comparison of Geoacoustic Models for Unfrozen Water Content Estimation

CCPortal

DOI	10.1029/2020JB019766
	Comparison of Geoacoustic Models for Unfrozen Water Content Estimation
	Lyu C.; Amiri S.A.G.; Grimstad G.; Høyland K.V.; Ingeman-Nielsen T.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	This paper reviews eight geoacoustic models applied to frozen soils: crystal growth models (grain cementing, grain coating, matrix supporting, and pore filling), the weighted equation (WE) model, Zimmerman and King's model (KT), the Biot-Gassmann theory modified by Lee (BGTL), and a two-end member model. We verify the capacity of these models to estimate unfrozen water content (UWC) based on “reference” UWC results and joint P and S wave velocities for different soil types. The satisfactory UWC estimates of saline unconsolidated sand and overconsolidated clay based on Vp data prove that the KT, BGTL, and two-end member models are capable of modeling “smooth” transitions in the ice crystal growth mode, while they may provide less accurate UWC values when abrupt change of crystallization mode occurs. None of the tested soil types show a single crystallization mode throughout the freezing process, as assumed by individual crystal growth models. Vs-based UWC estimates are less accurate due to significant but difficult-to-estimate influence of effective stress and soil initial cementation. All models, except pore filling and matrix supporting, can match Vs versus Vp measurement results for sands and silts but gradually provide inconsistent estimates with increasing clay content. We conclude that model validation by independent UWC measurements is necessary and that consistency between UWC values estimated from Vs and Vp is insufficient to ensure proper model validation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	frozen soil; geoacoustic model; ice crystal growth; unfrozen water content
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187540
作者单位	Department of Civil and Environmental Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Department of Civil Engineering, Technical University of Denmark (DTU), Kongens Lyngby, Denmark
推荐引用方式 GB/T 7714	Lyu C.,Amiri S.A.G.,Grimstad G.,et al. Comparison of Geoacoustic Models for Unfrozen Water Content Estimation[J],2020,125(10).
APA	Lyu C.,Amiri S.A.G.,Grimstad G.,Høyland K.V.,&Ingeman-Nielsen T..(2020).Comparison of Geoacoustic Models for Unfrozen Water Content Estimation.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Lyu C.,et al."Comparison of Geoacoustic Models for Unfrozen Water Content Estimation".Journal of Geophysical Research: Solid Earth 125.10(2020).