Plate-Load Tests on an Unsaturated Lean Clay
Plate-Load Tests on an Unsaturated Lean Clay
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不饱和贫粘土的平板载荷试验
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Claudia Sejas
中科院分区：
文献类型：
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作者：
J. C. Rojas;L. Salinas;Claudia Sejas
板载试验是一种常用的现场估算土承压力的方法。经典的结果测试解释没有考虑基质吸力效应。通过在贫黏土中进行的板载试验，分析了基质吸力在承载压力中的作用。在某非饱和贫粘土矿床中进行了7次板载试验；其中两个试验在饱和条件下进行，以验证现场的均匀性和试验的重复性，其中五个试验考虑了不同的基质吸力值。在每个试验坑周围0.1、0.3、0.6和0.9 m处插入四个Jet Fill张力计，监测沿板影响区的基质吸力。结果表明，轴承压力值受基质吸力变化的影响较大。
Plate-load tests are a common field method to estimate soil bearing pressure. Classic-result-test interpretations do not consider the matric suction effect. This paper analyzes the matric suction effect in bearing pressure from plate-load tests conducted in a lean clay soil. Seven plate-load tests were carried on in an unsaturated lean clay deposit; two of them were performed in saturated condition to verify the site homogeneity and test repeatability, five of them took into account different matric-suction values. Matric suction along the plate influence zone was monitored with four Jet Fill tensiometers, inserted at 0.1, 0.3, 0.6 and 0.9 m around every test pit. The results show bearing pressure values are highly influenced by matric suction changes.