Reinforce method and apparatus and apparatus of weak ground for civil engineering

摘要

The present invention relates to a soft ground reinforcement method and apparatus of the Public Works. Conventionally, there was a lot of insertion of the injection pipe for a grouting operation difficult if the sink or close the hole during drilling operations.; Thus, the present invention is the forward rotation and the expansion by the frictional force of the drilling point, the reverse rotation when there perforations and at the same time de lifter of the perforator of the injection pipe with the scalable bit is reduced by contact with the injection pipe fitted on the outside of the rod a first step of insertion into the perforations and gadongryeok; A second step of separation by the process of claim 1 by taking out an expandable bit from the injection pipe inserted into the hole and expression; The not only can simply insert the injection pipe to the soft ground and poor ground as constituted by any third step, without damage to perform the grouting operation the first through the injection pipe scalable bit is removed by the second step Thus the work It will have an effect that can further enhance the speed and simplicity, and efficiency. In addition, since the exact perforation made in their positions without re-drilling, as in a traditional construction are possible precisely the effect of the design. And this operation speed and ease of the process time with efficiency and speed, the cost reduction by being an advantage with the economics of construction.