Method for testing relative density of sand gravel of dam body of built dam

The invention discloses a method for testing the relative density of sand gravel of a dam body of a built dam. The method comprises the following steps: step 1, planning a test hole section; 2, drilling and sampling an undisturbed sample and a disturbed sample of a rock core; 3, performing natural density and natural moisture content tests on the undisturbed sample; 4, testing the minimum dry density and the maximum dry density of the disturbance sample; and 5, calculating and determining the relative density of the sand gravel. The method has the advantages of accurate and reliable test results. 本发明公开了一种已建大坝坝体砂砾石相对密度的测试方法。它包括如下步骤，步骤一：规划试验孔段；步骤二：钻探及采取岩芯原状样、扰动样；步骤三：对原状样进行天然密度和天然含水率试验；步骤四：对扰动样进行最小干密度和最大干密度试验；步骤五：计算确定砂砾石的相对密度。本发明具有测试成果准确、可靠的优点。