摘要:
The invention relates to a method for consolidating the ground (S) encasing a tunnel (10) excavated in sections (R 1 ,...RN), a pre-supporting beam (V 1 ,..., VN) being mounted over each section (R 1 ,...RN) of the tunnel (10), said beam consisting of a plurality of tubes (12) arrangement substantially parallel to each other and to the axial direction of the tunnel (10) and sealed to the ground (S) by means of a sealing grout. Once the sealing grout has hardened, the method comprises a novel step of injecting a consolidation grout into the ground (S) via at least one tube (12) of the pre-supporting beam (V 1 ,..., V N ).
摘要:
A drilling and grouting device comprises a drill string including a hollow elongate outer rod having a central axis and a hollow elongate inner rod located coaxially within said outer rod, wherein a first outer flow path is defined between said inner and outer rod, and a first central flow path is defined inside said inner rod, a drill bit aligned with said inner rod along said central axis and including a second central flow path, and a crossover part interposed between said inner rod and said drill bit along said central axis, which is configured to connect the first central flow path with a second outer flow path surrounding the drill bit to form a main path and to connect said first outer flow path with said second central flow path to form a secondary path. Also disclosed are systems and methods that include and use the device.
摘要:
The invention relates to a facility (10) for manufacturing a continuous wall in the ground (S), comprising: an excavation machine (14) comprising a frame (16) having a lower end (16b); determination means (80) for periodically determining the separation between the frame and a first screen during the manufacturing of a second screen in the ground, adjacent to the first screen; and correction means (50) for periodically correcting the position of the frame (16) in order to reduce the separation determined by the determination means between the frame (16) and the first screen (E1), such as to maintain an overlap between the longitudinal edge of the frame and the longitudinal edge of the first screen, such that the second screen is secant to the first screen (E1) over the entire shortest length of the first and second screens.
摘要:
The invention relates to a method for producing a ground anchor, in which: a drilling tool is provided, which includes a drilling tube (12) having an open distal end (14) and a means (20) for vibrating the drilling tube; a drill-hole (F) is made in the ground (S) by means of the drilling tool (10) by vibrating the drilling tube (12), the drilling tube being taken to a predetermined depth; once the drilling tube (12) has reached the predetermined depth, a reinforcement (30) is inserted in the drilling tube (12) and a sealing grout is injected into the drill-hole (F) via the drilling tube before or after having inserted the reinforcement in the drilling tube.
摘要:
The invention provides a method for pulling strands or sub-groups of strands of a multi-strand cable into a conduit (3). In accordance with this method, a strand or sub-group of strands (2) to be pulled into the conduit is conveyed from one end of the conduit to the other by the movement of a drive element (1) in tension, to which the strand or sub-group of strands is temporarily coupled. In addition, the drive element in tension is designed not to enter a bundle of previously installed strands.