DPP-100型汽车钻是国内工程勘察应用较多的一种钻机,由于原设计主要只考虑了迴转钻进,因而使其在使用上受到了限制,钻机性能较为单一。为了提高DPP-100型钻机在工程地质勘察中的技术性能,我院对该钻机进行了两项改进(见照片):一项是在塔架上部加装了一个冲击架,可供冲击钻进用,冲击次数为25～60次/分,冲程0.3～0.8米;第二项 DPP-100 type automobile drill is one kind of drilling rig with more applications in China. Due to the original design mainly considering rotary drilling, it has been limited in use, and the drilling rig performance is relatively simple. In order to improve the technical performance of DPP-100 rig in engineering geological survey, two improvements have been made to the rig (see photo): one is to install an impact frame on the upper part of the tower for impact drilling Use, the impact of the number of 25 to 60 beats / min, stroke 0.3 to 0.8 meters; the second