首页|Discussion on pile axial load test methods and their applicability in cold regions

Discussion on pile axial load test methods and their applicability in cold regions

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The measurement of pile axial load is of great significance to determining pile foundation design parameters such as skin friction and end bearing capacity and analyzing load transfer mechanisms.Affected by the temperature and ice content of frozen ground,the interface contact relationship between pile foundation and frozen soil is complicated,making pile axial load measurements more uncertain than that in non-frozen ground.Therefore,it is necessary to gain an in-depth understanding of the current pile axial load test methods.Four methods are sys-tematically reviewed:vibrating wire sensors,strain gauges,sliding micrometers,and optical fiber strain sensors.At the same time,the applicability of the four test methods in frozen soil regions is discussed in detail.The first two methods are mature and commonly used.The sliding micrometer is only suitable for short-term measure-ment.While the Fiber Bragg grating(FBG)strain gauge meets the monitoring requirements,the Brillouin optical time-domain reflectometer(BOTDR)needs further verification.This paper aims to provide a technical reference for selecting and applying different methods in the pile axial load test for the stability study and bearing capacity assessment of pile foundations in cold regions.

Pile axial loadTest methodsPile shaft resistanceSensorsCold regions

JiaWei Gao、Ji Chen、Xin Hou、QiHang Mei、YongHeng Liu

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Beiluhe Observation and Research Station on Frozen Soil Engineering and Environment in Qinghai-Tibet Plateau,State Key Laboratory of Frozen Soil Engineering,Lanzhou,Gansu,730000,China

University of Chinese Academy of Sciences,Beijing,100049,China

Strategic Priority Research Program of the Chinese Academy of ScienceScience and Technology Project of State Grid Corporation of ChinaNational Natural Science Foundation of ChinaState Key Laboratory of Frozen Soil Engineering Foundation

XDA20020102SGQHDKYOSBJS20160007741101065SKLFSE-ZT-34

2022

寒旱区科学(英文版)
中国科学院寒区旱区环境与工程研究所,科学出版社有限责任公司

寒旱区科学(英文版)

CSCD
影响因子：0.237
ISSN：1674-3822
年,卷(期)：2022.14(4)
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