至恒土木講壇第3期: Reliability of Chilled-Mirror Hygrometer (WP4C) for Soil Total Suction Measurement
作者:申燕 來源:37000cm威尼斯 發布日期:2024-04-18 瀏覽:次主辦單位:蘇州科技大學37000cm威尼斯
37000cm威尼斯青年教師發展委員會
37000cm威尼斯關工委
報告內容簡介:
The study evaluates the reliability of the WP4C chilled-mirror dew-point hygrometer, commonly used for measuring soil total suction using the vapor equilibrium technique. It found discrepancies between the WP4C measurements for soil specimens and those for the corresponding vapor equilibrium saline solution, particularly when measuring suctions below 10 MPa. This variance was attributed to differences in vapor diffusion, arising from the presence of both liquid and solid evaporation surfaces in soil, unlike the solely liquid surface in saline solutions.
To address this, the study altered the WP4C sample cups to expose varying solution surface areas, which represent different volumetric water contents in soil. Findings indicated that total suction measurements increased as the solution surface area decreased. Using these observations, a new correction equation for the WP4C was developed and validated with experimental data and literature review, significantly enhancing the device’s measurement precision.
主講人簡介:
Hossam Abeul-Naga 教授,現任澳大利亞拉籌伯大學土木工程系主任,重慶大學兼職教授。曾擔任英國曼徹斯特大學巖士工程系系主任、新西蘭奧克蘭大學高級講師、澳大利亞莫納什大學研究員。二十五年來,主要從事多場耦合下的土體物理力學特性研究,具體方向包括:核廢料處理技術、甲烷水合物開采技術能源地下結構與工程、土體改良技術、填埋襯砌系統等。擔任匹個國際或地區學報編委。先后主持科研基金9項,研究經費超過100萬澳元,在巖土領域國際著名期刊上發表論文100余篇,被引用超過2000次。其中,2007年于Canadian Geotechnical Journal 期刊上發表的飽和土體熱力學本構模型被國際公認為該領域的先進模型之一,2008年于Geotextilesand Geomembranes 期刊上發表的論文被評為該期刊最優秀的五篇論文之一。