Artificially frozen ground and related engineering technology in Japan

• 作者: Satoshi Akagawa
• 来源期刊: 寒旱区科学（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: Review
• 页码范围: 77-86
• 页数: 10页
• 语种: 英文

摘要

Since the 1970's, frozen ground has been developing near the Tokyo Bay area around liquefied natural gas (LNG) in-ground storage tanks. For disaster prevention purposes, the tanks are constructed below the ground surface. Since the tem-perature of the liquid stored in the tanks is?162 ℃ the soil surrounding the tanks freezes. Since this frozen ground has ex-isted for almost half a century, we have permafrost near Tokyo. The development of artificial frozen ground may cause frost heaving, resulting in frost heave forces that may cause structural damage of adjacent LNG in-ground storage tanks. Therefore, the demand for frozen ground engineering increased and consequently we now have advanced technology in this area. Fortunately, we use this engineering technology and artificial ground freezing for civil engineering, especially in big and crowded cities like Tokyo. This paper provides a summary of the testing apparatus, test methods, and assessment methods for frost heaving.