The difference between ordinary anchor bolt and self drilling anchor
The ordinary anchor bolt is mainly suitable for the whole formation. When the formation is broken or accumulated by the filling material, the DTH Drill is used to form a hole, the hole is easy to collapse, and the ordinary anchor rod can not be put into the hole smoothly. In this case, the self drilling anchor rod can be used. Since the self drilling bolt integrates the drilling, the installation, the grouting and the anchoring, the utility model makes up the requirement of the ordinary anchor rod for the stratum and ensures the fullness of the grouting body.
Self drilling anchor is a new anchor technology developed in recent years. The utility model is a full threaded rod body which can drill and grouting in the broken rock stratum and the loose soil layer without using a casing pipe and a drill rod. Because of its convenient construction, reliable, efficient and relatively low cost, in loose and broken, is widely applied into the hole to the posterior pole hole collapse slope, foundation pit, tunnel, soil nailing wall, pull back anchor retaining wall and other complex strata in supporting engineering.
Because of the influence of stratum, condition and so on, the grouting is not enough, and the pulling force of the self drilling anchor is often lower than that of the ordinary anchor. The self drilling anchor is the main stress component in the anchor retaining wall, and the key to ensure the stability of retaining wall is whether it can provide the pull-out force to meet the design requirements.
Sinorock first conducted a self drilling anchor test, based on the analysis of factors affecting the pullout force of self drilling anchor , specific technical measures were formulated to improve anchor pullout force, the quality of the project meet the design requirements, to achieve the expected goals.