广东某核电站强风化花岗岩直接剪切特征分析
Analysis of Shear Characteristics of Strongly Weathered Granite in a Nuclear Power Plant in Guangdong Province
为了对某核电站强风化花岗岩提供合适、准确的抗剪强度参数，通过分析其基本特征，进行了室外剪切试验和室内模拟剪切试验。研究认为：室外直剪试验的粘聚力和摩擦角远大于室内直剪试验；室内直剪试验的粘聚力与饱和度、天然密度呈正比关系，摩擦角相对变化幅度较小；水对粘聚力的弱化效果较为明显，而对摩擦角影响较小。在实际工程中，本区域的强风化花岗岩体，受结构、构造面，含水率、气候、施工等多种影响，抗剪强度远小于试验值。因此判定此类强风化花岗岩体的抗剪强度，不能简单地以某种剪切试验值、数值模拟、工程类比等单独作为依据来评判，而应全面进行分析判定。本研究为类似岩体抗剪强度研究提供了参考。
反应堆、核电厂
强风化 花岗岩 抗剪强度 粘聚力 摩擦角 直接剪切
刘军.广东某核电站强风化花岗岩直接剪切特征分析[EB/OL].(2025-08-04)[2025-10-14].https://chinaxiv.org/abs/202508.00183.点此复制
In order to provide suitable and accurate shear strength parameters for highly weathered granite in a nuclear power plant, outdoor shear tests and indoor simulated shear tests were conducted by analyzing its basic characteristics. Research suggests that the cohesion and friction angle of outdoor direct shear tests are much greater than those of indoor direct shear tests; The cohesion of indoor direct shear test is directly proportional to saturation and natural density, and the relative change in friction angle is relatively small; The weakening effect of water on cohesion is more significant, while its impact on friction angle is relatively small. In practical engineering, the highly weathered granite bodies in this area are affected by various factors such as structure, structural planes, moisture content, climate, and construction, resulting in shear strength far lower than the experimental values. Therefore, to determine the shear strength of such strongly weathered granite masses, it is not simply based on certain shear test values, numerical simulations, engineering analogies, etc., but should be comprehensively analyzed and judged. This study provides a reference for the study of shear strength of similar rock masses.
Strongly weathered granite Shear strength Cohesion friction angl Direct cutting
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