下沉土层中打入桩的单位轴阻力发展情况

IF 3 3区工程技术 Q2 ENGINEERING, GEOLOGICAL

Canadian Geotechnical Journal Pub Date : 2023-12-06 DOI:10.1139/cgj-2022-0694

J. Kania, Kenny Kataoka Sorensen, B. Fellenius

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引用次数: 0

摘要

研究了地表填筑引起周围软土沉降，沥青涂层对灌注钢桩和预制混凝土桩沿轴单元阻力发展的影响。所有桩均采用传统的离散点振动丝应变仪和分布式光纤传感器进行测量，以实现高分辨率应变测量。观察到，沿无涂层桩的动员单元轴阻力的大小主要与由过量孔隙水压力的消散引起的有效应力的增加有关。结果表明，涂覆沥青桩的桩身阻力主要与桩土相对运动速率有关，说明涂覆沥青对降低桩身阻力的有效性。

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The development of unit shaft resistance along driven piles in subsiding soil

The influence of bitumen coating on the development of unit shaft resistance along driven steel and pre-cast concrete piles resulting from subsiding surrounding soft soil (Gyttja) induced by fill placement at terrain was investigated. All piles were instrumented with conventional discrete-point vibrating wire strain gauges and distributed fiber optic sensors to achieve high resolution strain measurements. The magnitude of the mobilised unit shaft resistance along uncoated piles was observed to be primarily related to an increase in effective stress resulting from the dissipation of excess pore water pressures. The unit shaft resistance along bitumen coated piles was found to be primarily related to the rate of relative movement between pile and soil, which highlights the effectiveness of bitumen coating in reducing shaft resistance.

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来源期刊

Canadian Geotechnical Journal 地学-地球科学综合

CiteScore

7.20

自引率

5.60%

发文量

163

审稿时长

7.5 months

期刊介绍： The Canadian Geotechnical Journal features articles, notes, reviews, and discussions related to new developments in geotechnical and geoenvironmental engineering, and applied sciences. The topics of papers written by researchers and engineers/scientists active in industry include soil and rock mechanics, material properties and fundamental behaviour, site characterization, foundations, excavations, tunnels, dams and embankments, slopes, landslides, geological and rock engineering, ground improvement, hydrogeology and contaminant hydrogeology, geochemistry, waste management, geosynthetics, offshore engineering, ice, frozen ground and northern engineering, risk and reliability applications, and physical and numerical modelling. Contributions that have practical relevance are preferred, including case records. Purely theoretical contributions are not generally published unless they are on a topic of special interest (like unsaturated soil mechanics or cold regions geotechnics) or they have direct practical value.