摘要:
A method for repairing in-ground tunnel structures including the steps of: a) cleaning the structure to be lined; b) installing a suspension cable along the top of the tunnel; c) suspending sheets of liner composite along the suspension cable; d) applying resin to one side of the tunnel; e) bedding the liner composite into the applied resin; f) removing suspension cable once the top edge of the resin and liner composite becomes self-supporting; g) applying resin to the other side of the tunnel; and h) bedding the liner composite into the resin. The process can then be repeated along the length of the tunnel in a sheet by sheet fashion.
摘要:
A method of installing a fill fence system at a predetermined location to at least partially cover an opening defined by a back, a floor, and side walls. The method includes providing a carrier system including a carrier assembly, locating the carrier assembly in a safe zone adjacent to the unsafe zone, and positioning an assembled fill fence assembly on the carrier assembly. The carrier assembly and the full fence assembly are moved to a preselected location. With the carrier assembly at the preselected location, the fill fence assembly is positioned at the predetermined location, and installed at least partially to cover the opening. The carrier assembly is disengaged from the fill fence assembly and removed from the preselected location. The fill fence system includes a securing element is applied to help secure the fill fence assembly in the opening.
摘要:
A formwork for constructing an arched structure comprises a first end panel and a second end panel. A plurality of longitudinal members extends between the first end panel and the second end panel. The longitudinal members are arranged in an arched formation and the longitudinal members slope between the first end panel and the second end panel. The formwork may have rollers disposed along lengths of the longitudinal members.
摘要:
A segment roundness measuring device including a correction means that corrects the positional deviation of the turning center of an erector turning portion resulting from eccentricity on the basis of an angle detected by an angle detector and distances measured by three or more distance meters arranged at angular positions different from each other in the erector turning portion.
摘要:
A segment roundness measuring device including a correction means that corrects the positional deviation of the turning center of an erector turning portion resulting from eccentricity on the basis of an angle detected by an angle detector and distances measured by three or more distance meters arranged at angular positions different from each other in the erector turning portion.
摘要:
Methods and equipment have been developed that combine the use of continuous miners, flexible conveyor trains, and longwall mining techniques to provide flexible and efficient removal of resources from subterranean formations. Some systems include: a main gate; and a tailgate connected to the maingate by an active mine face; wherein the active mine face extends at an angle between 95° and 135° relative to the maingate.
摘要:
A roadway support (1) is introduced in parallel to the face advancement of a gallery(1) by means of a selective cut heading machine (2) by providing lagging mats (18, 19) in the form of rolled mats (20, 21) downstream of the cutting tool (3) of the selective cut heading machine (2) in two transverse planes (14, 15) that are arranged behind one another in the longitudinal heading direction in circumferential offset relationship. The lagging mats (18, 19) are then unrolled simultaneously to the face advancement in the longitudinal heading direction so as to overlap laterally and are instantly aligned upon the rock. Once the lagging mats (18, 19) have been entirely unrolled, the working steps are successively repeated in accordance with the length of the face advancement with new lagging mats (18, 19) that adjoin the lagging mats (18, 19) previously laid. The roadway support (7) is introduced at a distance to the cutting tool (3) while fixing the lagging mats (18, 19).
摘要:
In a process and a winding device for lining elongated spaces such as tunnels or ducts of circular and non-circular cross-sections, especially for canal and tunnel construction band is employed. Tubes with various diameters and different cross-sections, but mainly with circular and egg-shaped cross-sections, may be created from the band by the winding device.
摘要:
Support plates used in so-called rock bolting for supporting the roof in an underground excavation, such as a tunnel or mine, are positioned initially by a parallelogram bar structure that is attached to a moveable shield that is moveable upwardly toward the roof by lifting cylinders. Two bar structures are arranged side-by-side and each has at one end a shoe that includes support plate positioning surfaces and at least one shoe has a centering pin that automatically locates and centers the support plate. Upon placing a support plate on the shoes and determining that the excavation roof is of a sufficient height, the two bar structures are pivotted upwardly, which turns the support plate parallel to the roof and by means of the lifting pistons the support plate is firmly pressed against the roof so that automatic anchor placement or rock bolting is facilitated.
摘要:
A track-mounted vehicle having legs which can be retracted or extended, so that the vehicle can be raised to permit advancement of the track and then lowered, the vehicle either being raisable off the track to permit advancement, or having captivating means by which the track is raised, together with the vehicle, the track and the vehicle having rack-and-pinion or rack-and-chain drive means so that, in the raised position, the track can be advanced by said drive means and, in the lowered position, the vehicle is movable along the track by said drive means.