岩体体积节理数是衡量岩体完整性的重要指标之一,其现场实测方法有直接测量法、间距法、条数法等。论文分析了各现场测量方法的原理及其存在的问题,并结合实例测量成果,认为:直接测量法较准确,但测量面积要足够大;间距法结果偏小,应乘以1. 05～1. 1的修正系数;条数法受测量面方位的影响较大,应用时应有足够的样本数,以均值为基数乘以1. 4～1. 7的修正经验系数。
Rock mass volumetric joint count is one of the most important indexes to evaluate the integrity of rock mass. In - situ measurementmethodsmainly include directmeasurementmethod, spacingmethod, and joint num2 bermethod. All of these measurement methods, p rincip les and their respective disadvantages are analyzed in the paper. Combined with p ractical examp les, it is believed that directmeasurementmethod is relatively accurate, but it requires adequate measurement area that is as large as possible. Data coming from spacing method are slightly low, so it has to be multip lied by correction factor of 1. 05～1. 1; Joint numbermethod is strongly influenced by the azimuth of the surveyed surface. In app lication, it requires enough samp les. Their average value is used as the car2 dinal number. It has to be multip lied by experience correction factor of 1. 4～1. 7.