The Behaviors for Thaw Settlement and Consolidation of Frozen Soil--Case Study for Taichung Harbor Area

• Main Authors: TENG, T.C., 鄧誠正
• Other Authors: JIANG, D.H.
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/28873626091387429761

碩士 === 逢甲大學 === 土木及水利工程研究所 === 81 === This thesis is an investigation of no larger change in the coefficient of consoidiation of the frozen soil after thawing. The soil selected for this studies are saline soils which are popular in existence along the site of the coasts of Taiwan. The testing soils are sampled from the site of Taichung Fossil-fueled Power Plant ， Expansion Unit 2. Because this construction project is located near the seashore of Taichung Harbour ，the soils sampling contain in nature of 1％ salt concentration. In addition ，these salt-affected soils possess some amounts of the anode ions (sodium- and magnesium-ions). Due to occurrence of the factors， their influence to the coefficient of consolidation are also included for studies. According to their physical properties， we take four different soils for tests. The samples are : 1. No salt soil. 2. The saline soil of 1％ salt concentration. 3. The soil of 1％ sodium concentraction. 4. The soil of 1％ magnesium concentraction. And from the testing results，we conclude that: A. The coefficient of consolidation after thawing of these four sampling soils are almost close. B. The coefficient of thaw settlement Ａo varies with different soils ，it is examined that the sodium soil has relatively larger value than the regular soil. C. With temperature ranging from -15℃ to ambient 20℃,the void ratio will increase in all four sampling soils. But the regular soil will have the largest increase while the saline soil shows smallest increasing of void ratio. A full knowledge of the behaviors on the consolidation by freezing-thawing techniques will render a reasonable good solution to the engineers dealing with construction and design works.