| 摘要 |
The present invention is adapted to provide a front-end apparatus used in a grouting system, in which the front-end apparatus, that comprises injection tubes, has a compact configuration but which nevertheless allows freedom of the depth into the ground where grouting is performed and has a wide work area and facilitates work control and allows effective implementation of boring, bore-widening and grouting work in soft ground, and allows easy and effective implementation of boring of the ground and bore-widening in the bored ground, allows the extent of bore widening to be adjusted, and permits grouting work at various diameters, thereby permitting the work efficiency in ground improvement working to be dramatically improved and work to be done at various diameters by means of just an apparatus of fixed size and allowing increased convenience in ground improvement work and, additionally, allowing the extent of bore widening in the ground to be systematically monitored and so permitting accurate and reliable ground improvement working. |
