高层建筑工程地基岩体的质量预测与控制

Quality Prediction and Control for Foundation Rock Mass of High Buildings

通过一个高层建筑工程群场地地基岩体的勘测实例，说明：首先，在研究与划分岩体风化程度时，根据弹性波（声波）测试结果，采用岩体的动力参数──纵波速度（Vp）、风化系数（Fn）、完整性系数（I）等指标，结合岩体地质特征和根据有关规范要求，对岩体进行风化分带和软弱、破碎带的划分；其次，通过室内弹性波速测试与静力法岩石试验了解岩体的物理力学性质，并建立岩石动、静参数关系，以便充分利用现场波速测试经济快速、定量直观的优势。

Following conclusions are resulted from a foundation rock mass survey practice in a high building area: in the process of researching and dividing the weathering intensity of rock mass, in accordance with the measuring results of elastic wave (sound wave) and combining with the rock mass geological characteristics, the dynamic parameters of rock mass such as longitudinal wave velocity (Vp), weathering factor (Fn) and intact factor (I) can he used under concerned specification gUidance to delimit weathering zone and divide the weak zone and the fracture zone; and then, the physical mechanics properties of rock mass can be Perceived through indoor elastic wave velocity measuring and static test and the relation between rock's dynamic parameter and static parameter can be formed to offer determination basis for selection of foundation load layer and prediction of rock mass characteristics by taking the economical, fast and quantitative advantages of the method of site wave velocity measuring.