This paper reviews the load–settlement behaviour of 499 plate load tests of various diameters undertaken on granular soils and working platform materials to determine the angle of internal friction mobilised by the test. The observed settlement of individual plate load tests at relatively small settlement has been extrapolated to a theoretical failure of the plate at 10% and 15% of the plate's diameter (D). For each test an effective angle of internal shearing resistance was calculated based on the bearing resistance associated with the stress required to cause settlement of 0.10 or 0.15 times the plate diameter. The results are presented along with a discussion on the use of high-friction materials in working platforms and shallow foundations. Characteristic values for the effective angle of internal shearing resistance are provided for all working platform materials tested, as well as tests undertaken on platform materials comprising crushed brick and concrete. These values are compared to shear box test results on similar materials. Characteristic values of ϕ′ varying from 44° to 46.4° (0.1D) and 45.3° to 47.8° (0.15D) for crushed brick and concrete materials are calculated, which are slightly higher than those determined from tests on Type 1 material.

中文翻译：

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通过板载荷试验估算工作平台材料的内摩擦角

本文回顾了在粒状土壤和工作平台材料上进行的 499 个不同直径的板载荷试验的载荷沉降行为，以确定试验产生的内摩擦角。在相对较小的沉降下，观察到的单个板载荷测试的沉降已推断为板在板直径的 10% 和 15% 处的理论失效（D）。对于每个测试，根据与引起 0.10 或 0.15 倍板直径沉降所需的应力相关的承载阻力，计算内部剪切阻力的有效角度。报告结果同时还讨论了高摩擦材料在工作平台和浅基础中的使用。为所有测试的工作平台材料以及对包括碎砖和混凝土的平台材料进行的测试提供了内抗剪有效角度的特征值。将这些值与类似材料的剪切盒测试结果进行比较。φ ′的特征值从 44° 到 46.4° (0.1 D ) 和 45.3° 到 47.8° (0.15 D )变化）对碎砖和混凝土材料的计算结果略高于 1 类材料试验确定的值。