초록 ▼

A drilling method and device is for the execution of diaphragm walls by cutters, (131, 105, 110) carried by a frame (130) supported by suspension and movers (102). A guide hole (200) is formed as far as the depth specified in the design at the center of the panel to be made. Excavation is started wi

A drilling method and device is for the execution of diaphragm walls by cutters, (131, 105, 110) carried by a frame (130) supported by suspension and movers (102). A guide hole (200) is formed as far as the depth specified in the design at the center of the panel to be made. Excavation is started with the introduction into the guide hole (200) of a guide element (101) that is fixed with respect to the tool-holder frame and having geometry such as to copy the guide hole along which it slides during excavation. Excavation is carried out as far as the depth specified in the design. The tool is extracted from the excavation and the excavation is filled with concrete and a panel is formed. The method is repeated so as to form adjacent panels.

대표청구항 ▼

1. A method for drilling, and forming a diaphragm wall panel by a cutting tool carried by a frame supported by suspension and movement means, the method comprising the following consecutive steps: a) forming a single guide hole as far as a depth specified in a design;b) starting excavating to form o

1. A method for drilling, and forming a diaphragm wall panel by a cutting tool carried by a frame supported by suspension and movement means, the method comprising the following consecutive steps: a) forming a single guide hole as far as a depth specified in a design;b) starting excavating to form one panel, excavating outside the single guide hole, and maintaining the single guide hole at a center point of an excavation to form the panel, and at the same time, introducing a guide element into the single guide hole, said guide element being rigidly fixed with respect to the frame and having a geometry configured for mating with the single guide hole; said guide element guiding the cutting tool along the depth of the guide hole to avoid deviation of the cutting tool;c) executing the excavation, excavating as far as the depth specified in the design by said cutting tool, said guide element sliding downward along said guide hole during execution of the excavation;d) extracting the cutting tool from the excavation;e) filling of the excavation with casting concrete and formation of the panel. 2. The method according to claim 1, further comprising repeating steps a)-e) for making adjacent contiguous panels, and continuing from a first panel. 3. The method according to claim 1, wherein, after step a) of forming the guide hole, the guide hole is partially filled with hardening material so that once the material hardens, the guide hole achieves a prismatic shape adapted to mate with the guide element having a complementary shape to prevent accidental rotation of the cutting tool about an axis of excavation. 4. The method according to claim 1, wherein, subsequently after step a) of forming the guide hole, two further lateral holes are made as far as the depth specified in the design and lateral to the hole already made and at a distance from the hole already made to be located in a position corresponding to a joint between adjacent contiguous panels. 5. The method according to claim 4, wherein sliding within the lateral holes are shield appendages lateral to the frame, acting against walls of the lateral holes to limit and/or correct accidental deviations about axes x, y, and z of the cutting tool during excavation. 6. The method according to claim 1, comprising a debris evacuation phase executed during step c) of excavating. 7. The method according to claim 1, comprising a phase of controlling rotation of the cutting means around an axis of said guide hole. 8. Drilling device for excavating a diaphragm wall panel; the drilling device comprising: a frame equipped with at least two cutting tools set alongside one another and symmetrically disposed with respect to a center point of the frame, said cutting means defining extension of a front excavation area of excavation to form a single panel,a guide element rigidly fixed and positioned at the center point of the frame between said at least two cutting tools, said guide element being rigidly fixed with respect to the frame; said guide element having a geometry complementary to a central guide hole previously made in the ground for an entire depth specified in a design; said guide element sliding along said central guide hole defining a center point of the front excavation area to form the panel, said guide element guiding the cutting tools along a depth of the hole to avoid deviation of the cutting tool;said cutting tools being symmetrically disposed with respect to said guide element. 9. The device according to claim 8, wherein the cutting tools are circular millers. 10. The device according to claim 8, wherein the cutting tools are milling drums with axes inclined with respect to a horizontal plane and with a direction coinciding with a longitudinal plane of the panel. 11. The device according to claim 8, wherein the cutting tools are chains provided with cutting edges, the chains being inclined with respect to a horizontal plane and arranged with the cutting edges working in a plane coinciding with a longitudinal plane of the panel. 12. The device according to claim 8, wherein positioned laterally on the frame are shield appendages, adapted to slide in two further holes made at the sides of the central hole and at a distance from the central hole to be located in a position corresponding to a joint between adjacent panels. 13. The device according to claim 8, wherein the guide element has a geometry configured to collect debris falling into the guide hole, and wherein a system for evacuation of debris has a suction mouth in a position corresponding to a space for collection of debris contained in the guide element. 14. The device according to claim 8, wherein the drilling device is equipped with a system for evacuation of debris adapted to modulate opening of mouths for selective collection of material from two additional guide holes formed at sides of the central hole. 15. The device according to claim 8, wherein the guide element has a prismatic shape adapted to mate with the guide hole having a complementary shape to prevent accidental rotation of the cutting tool about an axis of excavation. 16. The device according to claim 8, comprising an element adapted to control rotation of the cutting means around an axis of the guide hole. 17. A method for drilling and forming a diaphragm wall panel by a cutting tool carried by a frame supported by means for suspending and moving, the method comprising the following steps: a) forming a single guide hole to a depth specified in a design, the single guide hole defining a center point of an excavation to form one panel;b) starting excavation outside the single guide hole, and at the same time introducing a guide element into the single guide hole; said guide element being rigidly fixed with respect to the frame and having a geometry configured for mating with the guide hole; said guide element guiding the cutting tool along the depth of the guide hole to avoid deviation of the cutting tool;c) executing the excavation, excavating to the depth specified in the design by said cutting tool, always maintaining said single guide hole at the center of the excavation; said guide element sliding downward along said guide hole during the executing of the excavation;d) extracting the cutting tool from the excavation; ande) filling the excavation with casting concrete and forming the panel. 18. A method for drilling and forming a diaphragm wall panel by a cutting tool carried by a frame supported by means for suspending and moving, the method comprising the following steps: a) forming a single guide hole to a depth specified in a design, the single guide hole defining a center point of an excavation to form one panel;b) starting excavation outside the single guide hole, along a longitudinal extension of the diaphragm wall, contemporaneously to a left side and to a right side with respect to the guide hole in a symmetric manner, and at the same time introducing a guide element into the single guide hole; said guide element being rigidly fixed with respect to the frame and having a geometry configured for mating with the guide hole; said guide element guiding the cutting tool along the depth of the guide hole in order to avoid deviation of the cutting tool;c) executing the excavation, excavating to the depth specified in the design, by said cutting tool; said guide element sliding downward along said guide hole during the execution of the excavation;d) extracting the cutting tool from the excavation; ande) filling the excavation with casting concrete and forming the panel. 19. A method for drilling and forming a diaphragm wall panel by a cutting tool carried by a frame supported by means for suspending and moving, the method comprising the following steps: a) forming a single circular guide hole as far as a depth specified in a design, the single guide hole defining a center point of an excavation to form one panel, said guide hole is positioned in the ground with directional perforation in order to align verticality;b) starting excavation outside the single guide hole, and at the same time introducing a guide element into the single guide hole; said guide element being rigidly fixed with respect to the frame and having a geometry configured for mating with the guide hole; said guide element guiding the cutting tool along the depth of the guide hole to avoid deviation of the cutting tool;c) executing the excavation, excavating to the depth specified in the design by means of said cutting tool; said guide element sliding along said guide hole during the execution of the excavation;d) extracting the cutting tool from the excavation; ande) filling the excavation with casting concrete and forming the panel.