3 results about "Tunneling length" patented technology

The application provides a tunnel water leakage monitoring device, comprising: a positioning water leakage detection line and a monitoring host; the monitoring host comprises a monitoring unit; the positioning water leakage detection line is arranged along a preset direction, the positioning water leakage detection line comprises a first conductive wire and a second conductive wire, the resistance value between the first conductive wire and the second conductive wire is a preset value, and the first conductive wire and the second conductive wire are connected through a water medium when water leaks; the monitoring unit is connected to both ends of the positioning water leakage detection line, and the monitoring unit is configured to collect the resistance value between the first conductive wire and the second conductive wire. The device covers the length range of the tunnel through the positioning water leakage detection line, and the water medium forms a conductive connection at the water leakage point, so that the device can sense the water leakage event, and the monitoring unit monitors the water leakage by measuring the resistance value change, thereby solving the problem of real-time monitoring of the water leakage point in the entire tunnel length range.

The invention belongs to the technical field of tunnel shield construction, and particularly provides a duct piece splicing device for electric power tunnel shield construction, which comprises a hoisting assembly, a bearing assembly, a cross beam and a splicing assembly, the hoisting assembly comprises a hoisting track and a hoisting mechanism, the hoisting mechanism is used for transferring duct pieces on a battery car to the bearing assembly, and the bearing assembly is used for bearing the duct pieces on the battery car; and therefore, a grabbing mechanism of the splicing assembly can grab the duct pieces conveniently. The splicing assembly comprises a rotating rail, a first driving part, a grabbing mechanism and a second driving part, the grabbing mechanism is used for grabbing the duct piece from the bearing assembly, the first driving part drives the rotating rail to move along the cross beam, the second driving part drives the grabbing mechanism to rotate along the rotating rail, the posture of the duct piece is changed, and after the duct piece is fixed to the inner wall of the tunnel, the duct piece is assembled. And the grabbing mechanism releases the duct piece and is driven by the second driving piece to reset. The hoisting mechanism and the rotating track move in the length direction of the tunnel during working, the needed operation space is smaller, and the construction requirements of small-diameter tunnels such as electric power tunnels are met.

The application discloses a tunnel expansion method for ensuring existing tunnel traffic, which comprises the following steps: setting a movable lining capable of moving longitudinally in the existing tunnel to form a traffic protection space, adopting a hollow rotary tunneling machine with an outer diameter matched with the expansion span and an inner diameter matched with the outer contour of the existing tunnel, and performing annular cutting and expansion with the existing tunnel entrance and exit as the starting and receiving ends; performing primary support synchronously during the tunneling process, and the protection length of the movable lining is always ahead of the tunneling length; after the expansion is completed, the tunneling machine is disassembled, secondary lining and auxiliary facilities are constructed, the original support of the existing tunnel is removed under the protection of the movable lining, and finally the movable lining is removed to complete the expansion. The application realizes uninterrupted existing traffic during the whole tunnel expansion, greatly reduces the disturbance of construction to surrounding rock and surrounding buildings, is safe and efficient in construction, and is suitable for large-span tunnel expansion projects of urban and busy traffic lines.