Geotechnical stabilization. Anchoring is one of the most common geotechnical application. For many decades, there has been a proven anchor drilling technique for temporary and permanent rock anchors for securing rock walls or cavities. This anchor drilling technique uses a generally long rock drilling linkage, which is propelled and turned into the rock. This is done without the flow control, but in a pre-set spatial orientation and usually with very long drill paths. However, in special mountain situations, long anchors are fitted with rope anchors or anchoring rods. Figure 7: anchoring with anchoring rods and anchoring plates Injections For the construction of subterranean barriers or foundations or post-fortifications very often injections are necessary. By means of HDD systems, direct injections can be carried out via the HDD drill head and possible additional side openings into the substrate using double drill rods. From the low-pressure range to the high-pressure range (HDI), the HDD systems can be used with the aid of a stronger pump. Particularly advantageous is the intake of cuff tubes from which injections can be made through defined openings. As a result, bracings, post- reinforcements and a parallel arrangement can be used to achieve complete barriers. The HDD technology offers, for example, advantageous application possibilities in the case of leading first safety devices, in the case of dump core seals (underwater solders), in the case of dam core injections and, for example, in block debris fusing. With HDD units, binders, powders or even dehumidifying substances can be introduced into the immediate environment from the borehole by means of the HDD drill head or a jet grouting drill head (for nozzle jet injection) and mixed there with the soil material. It is also possible to make the building blocks inside the sling body. It is sensible to install these injection columns, which have begun from above, in the sludge body, through the glide zone into the surrounding mountains, so that anchoring with the solid mountains occurs. Depending on the size of the existing thrust mass, the installation of overlapping columns is necessary, so that entire cross-column-shaped column strings, which should ideally cross over, can pass through the entire mass of the slides in order to divide the thrust mass into harmless individual bodies. The overlapping columns can be inserted so deeply into the up-to-the-mountain range and their diameter is designed so broadly that a complete penetr...
