Method for exploring riverbed covering layer by using variable angle inclined drilled hole

The invention discloses a method for exploring a riverbed covering layer by using a variable angle inclined drilled hole, and relates to the technical field of water conservancy and hydropower engineering and geotechnical engineering survey. The method includes the following steps that 1, the riverway terrain cross section is measured; 2, a riverbed covering layer/bedrock is preliminarily estimated to speculate a contact surface; 3, the geological drilling rig position is selected; 4, initial inclined drilling construction is carried out; and 5, inclined drilling construction is corrected, andmain characteristics of the riverbed coverage layer are obtained. The method has the advantages of being convenient and quick to operate and accurate in result, and the good adaptability is particularly achieved for expedition of a dalles riverway coverage layer in the southeast of the plateau. 本发明公开了一种利用变角度倾斜钻孔探查河床覆盖层的方法，涉及水利水电工程和岩土工程勘察技术领域。它包括包括以下步骤：步骤1，测量河道地形横断面；步骤2，初拟河床覆盖层/基岩推测接触面；步骤3，选定地质钻机位置；步骤4，初始倾斜钻孔施工；步骤5，修正倾斜钻孔