A tunnel boring device for laying a pipeline in the ground using a boring tool, having; a feed line for supplying a boring fluid to the boring tool; a section, arranged at the rear of the boring tool, for receiving the ground cuttings, wherein the region of the boring tool and the section are filled with boring fluid, with a pressure that corresponds to the pressure in the ground; at least a jet pump for removing the boring fluid mixed with the cuttings; at least one conveying line for removing the boring fluid mixed with cuttings, this line being connected to the delivery side of the pump connected to the section via a suction line. The jet pump is connected to a drive line via which a driving fluid is supplied to the jet pump; the pump is arranged outside then section; and the suction line contains a shutoff valve.

A tunnel boring machine for boring a tunnel in rock including: locating means mounted to a frame for supporting and locating the frame in a disposition with respect to a tunnel axis and a boring face of the tunnel being bored; a first boring assembly operatively associated with said frame for boring into an annular face surrounding a core substantially coaxial with the tunnel axis, the annular face being a portion of the boring face; a core removal assembly operatively associated with said frame and disposed axially with respect to said first boring assembly away from the annular face, said core removal assembly being operable for removing at the core exposed by the first boring assembly transverse to the tunnel axis to expose the remainder of the boring face; and drive means operatively associated with said first boring assembly for driving said boring assembly into the annular face.

The present invention relates to a mechanical tunneling apparatus and process for a tunnel in a quicksand stratum. The mechanical tunneling apparatus comprises isolating apparatuses arranged at an upper end and a lower end of a supporting apparatus; an excavation apparatus arranged at a front end of the supporting apparatus; a spraying apparatus arranged on the isolating apparatuses and the excavation apparatus; a muck discharging apparatus arranged at a lower part of the supporting apparatus; and a propulsion apparatus arranged at a rear end of the supporting apparatus. The mechanical apparatus of the present invention may effectively increase a tunneling speed and safety for the tunnel in the quicksand stratum, ensure the stability of surrounding rocks of the tunnel, and reduce a large volume of collapse of the quicksand stratum due to tunnel construction disturbance.

The present invention relates to a mechanical tunneling apparatus and process for a tunnel in a quicksand stratum. The mechanical tunneling apparatus comprises isolating apparatuses arranged at an upper end and a lower end of a supporting apparatus; an excavation apparatus arranged at a front end of the supporting apparatus; a spraying apparatus arranged on the isolating apparatuses and the excavation apparatus; a muck discharging apparatus arranged at a lower part of the supporting apparatus; and a propulsion apparatus arranged at a rear end of the supporting apparatus. The mechanical apparatus of the present invention may effectively increase a tunneling speed and safety for the tunnel in the quicksand stratum, ensure the stability of surrounding rocks of the tunnel, and reduce a large volume of collapse of the quicksand stratum due to tunnel construction disturbance.

Disclosed a combined rock-breaking TBM tunneling method in complex strata for realizing three-way force detection, comprising the steps of preparing a combined mechanical-hydraulic rock-breaking cutter head for TBM construction; starting construction; advancing the combined mechanical-hydraulic rock-breaking cutter head; pushing and pressing against a tunnel face by a mechanical cutter tool; subjecting a three-way force detection cutter to squeezing forces; feeding back three-way force data by a three-way force sensor; processing information by a TBM back-end control processor; obtaining a value of rock-cutter contact angle ; feeding back parameter information to a TBM cutter head control center by a lithology index center; responding by the TBM cutter head control center, obtaining and adjusting parameters by the mechanical cutter tool equipped with the three-way force sensor; and breaking rock by the combined mechanical-hydraulic rock-breaking cutter head. The method disclosed is energy-saving and efficient, and has high rock-breaking efficiency.

A propulsion control device of a 3D printing-based tunnel boring machine, includes two propulsion control modules, and each of which includes tunnel support assemblies, a propulsion control assembly and a barrel body, where a propulsion sliding sleeve is arranged on an outer surface, and several tunnel support assemblies are arranged on an outer side of each propulsion sliding sleeve. Support plates on the two propulsion control modules alternately rise to support a 3D printed tunnel pipe. In the propulsion control module with the support plates in a closed state, a propulsion hydraulic cylinder controls a propulsion hydraulic cylinder extending end to contract, so as to pull the propulsion sliding sleeve to a front section of the barrel body; and in the propulsion control module with the support plates in a support state, the barrel body continuously advances relative to the propulsion sliding sleeve.

A laser-assisted tunnel boring machine and a rock fragmenting method thereof belong to the technical field of tunnel engineering. Two rock fragmenting modes exist: a laser-cutter rock fragmenting mode and a cutter rock fragmenting mode, wherein the two rock fragmenting modes are switched by an intelligent control system; and for the laser-assisted rock fragmenting mode, hot fragmenting is mainly performed using lasers which assisted by water spray systems, to achieve the purposes of auxiliary rock fragmenting by laser radiation for hot cracking and water spray for quick cooling, and mechanical rock fragmenting for excavation.

A laser-assisted tunnel boring machine and a rock fragmenting method thereof belong to the technical field of tunnel engineering. Two rock fragmenting modes exist: a laser-cutter rock fragmenting mode and a cutter rock fragmenting mode, wherein the two rock fragmenting modes are switched by an intelligent control system; and for the laser-assisted rock fragmenting mode, hot fragmenting is mainly performed using lasers which assisted by water spray systems, to achieve the purposes of auxiliary rock fragmenting by laser radiation for hot cracking and water spray for quick cooling, and mechanical rock fragmenting for excavation.

A Tunnel Digging Machine (TDM) is a shield machine to excavate tunnels with almost any desired cross sections including rectangular, square, sub/semi-rectangular, sub/semi-square, horseshoe/U-shaped, elliptical, circular, sub/semi circular and such sections through a variety of soil and rock strata. The TDM can be designed to dig through anything from hard rock to sand with large range of width and height configurations. The TDMs can limit the disturbance to the surrounding ground and produce a tunnel lining. The TDMs may be used as an alternative to the current conventional Tunnel Boring Machines (TBM) or continuous miners. The major advantage of the TDMs over the TBMs will be their higher speed (higher advancement rate), fully sealable face, flexibility in the desired cross-section and reduced construction costs due to the mentioned higher speed, efficiency and optimized cross-section.

In a cutting wheel (103) for a tunnel boring machine, a tool condition monitoring device is provided to monitor the condition of at least one mining tool (112, 115, 118) during removal of a geological structure present, during tunneling, at the cutting wheel (103) in a tunneling direction. At least one support part (121, 124, 127) is installed separately and at a distance from the or a relevant mining tool (112, 115, 118). In the relevant support part (121, 124, 127), a current conductor element is embedded, which is interrupted in terms of its ability to carry current after a wear limit which is characteristic of the condition of the relevant mining tool (112, 115, 118) has been reached. In this way, the condition of mining tools (112, 115, 118) can be reliably determined during a relatively simple maintenance operation or retrofitting with a support part (121, 124, 127).