Measurement of tangential frost heaving stress for steel pile in clay silt

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2022-06-01 DOI:10.1016/j.coldregions.2022.103541

Zhang Tianyuan , Zhang Jianming , Zhang Hu , Zhang Qi , Wan Shuo

引用次数: 0

Abstract

Tangential frost heaving stress is the main force causing the frost jacking of pile foundation in frozen ground. It is of great engineering and scientific significance to measure the exact value of tangential frost heaving stress economically and quickly. In this study, a set of test equipment was designed and manufactured to measure the tangential frost heaving stress of steel pile in clay silt during freezing. At the same time, the soil temperature, vertical displacement and moisture content of the soil were measured. The results indicate that the measuring equipment is feasible, and a complete variation process of uplift force during the freezing-thawing cycle was obtained. In addition, some interesting phenomena were found in the tests, such as the slow reduction and rebound of the uplift force. Also, it was found that the water migrated horizontally to the pile during the freezing process, and the vertical ice films were formed in the soil around the pile.

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粘土质淤泥中钢桩切向冻胀应力的测定

切向冻胀应力是引起冻土中桩基冻胀的主要作用力。经济快速地测定切向冻胀应力的精确值，具有重要的工程和科学意义。本研究设计并制造了一套测试设备，用于测量粘土淤泥中钢桩在冻结过程中的切向冻胀应力。同时测量了土壤的温度、垂直位移和含水量。结果表明，该测量装置是可行的，并获得了冻融循环中扬压力的完整变化过程。此外，试验中还发现了一些有趣的现象，如扬压力的缓慢减小和回弹。研究还发现，在冻结过程中，水向桩体水平迁移，桩体周围的土壤中形成了垂直的冰膜。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.