A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls may be closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.

A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls may be closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.

A zero-emission, high-speed, autonomously controlled shipping container transport vehicle includes a first camera, a rotatable truck coupled to a plurality of front wheels, a steering motor, and a first flatbed frame. A second flatbed frame is configured to receive a battery module. A third flatbed frame is configured to communicate a load to the rear wheels. An electric battery module is disposed in the space of the second flatbed frame. A traction motor is coupled to at least one front wheel or rear wheel and is configured to derive electrical energy from the electric battery module. A vehicle controller is communicably coupled to the first and second cameras, traction motor, and steering motor, and is configured to operate in an autonomous mode to autonomously direct the traction motor to accelerate or decelerate and direct the steering motor to guide the vehicle.

A formwork system (10; 60), especially for tunnel construction, includes at least one support arrangement (14) for supporting at least one formwork element (16-26; 72-78). The formwork system further includes at least one concrete pump (36), a plurality of concrete supply units (42) for supply to the formwork element and at least one controller (32). On the formwork element (16-26; 72-78) and/or on the support arrangement (14) at least two pressure sensors (44; 92) are disposed at different vertical positions and are connected to the controller (32) of the formwork system, which pressure sensors (44; 92) are designed to measure the pressure acting upon the formwork elements (16-26; 72-78) at a minimum of two different heights of the formwork element, and that the controller (32) is designed to control the concrete supply units (42) individually, dependent on the signal from the pressure sensors (44; 92).

A system for folding and deploying liners within tunnels includes a mobile conveyor device having a base frame including a plurality of wheels supporting a support frame. The mobile conveyor device also includes a folding assembly mounted upon the support frame at a position adjacent a first end of the base frame and a conveyor assembly mounted upon the support frame at a position adjacent a second end of the base frame.

The procedure for the construction of underground transport infrastructures, comprises the steps of: excavating an underground transport tunnel comprising a first pipe and a second pipe substantially parallel to one another; making a bypass tunnel connecting the first pipe and the second pipe which comprises the sub-steps of: introducing a launching chamber along the first pipe up to a first predefined position chosen along the longitudinal direction of the first pipe, the launching chamber being able to launch a tunnel boring machine; introducing an arrival chamber along the second pipe up to a second predefined position chosen along the longitudinal direction of the second pipe, the arrival chamber being able to receive the tunnel boring machine; excavating the bypass tunnel making the tunnel boring machine move forward from the launching chamber to the arrival chamber along a direction transversal to the first pipe and to the second pipe.

The water-insoluble filler in the form of bubbles is provided into the underground cavern. Then, the filler thus provided is allowed to adhere to a bottom surface and a lower wall surface of the underground cavern to permeate thereinto. Subsequently, the filler having permeated is cured. Here, the water-insoluble filler in the form of bubbles may be provided again into the underground cavern. Moreover, water is poured into the underground cavern to float up the filler. The filler having floated up is allowed to adhere to an upper wall surface and a ceiling surface of the underground cavern to permeate thereinto. Thereafter, the filler having permeated is cured. Here, when the filler is allowed to permeate an inner surface of the underground cavern, a pressure inside the underground cavern may be increased. Additionally, when the filler is cured, a temperature inside the underground cavern may be increased.

The water-insoluble filler in the form of bubbles is provided into the underground cavern. Then, the filler thus provided is allowed to adhere to a bottom surface and a lower wall surface of the underground cavern to permeate thereinto. Subsequently, the filler having permeated is cured. Here, the water-insoluble filler in the form of bubbles may be provided again into the underground cavern. Moreover, water is poured into the underground cavern to float up the filler. The filler having floated up is allowed to adhere to an upper wall surface and a ceiling surface of the underground cavern to permeate thereinto. Thereafter, the filler having permeated is cured. Here, when the filler is allowed to permeate an inner surface of the underground cavern, a pressure inside the underground cavern may be increased. Additionally, when the filler is cured, a temperature inside the underground cavern may be increased.

A method for determining parameters of cross sections of a single-hole four-lane highway tunnel includes the steps of determining surrounding rock pressure, constructing numerical models under different flatness ratios, calculating interval force of lining structures, calculating safety coefficients of the lining structures, performing contrastive analysis on the cross sections under different flatness ratios, obtaining reasonable cross section forms, and so on. This method provides a basis to formulate the specifications and standards for design of a single-hole four-lane highway tunnel and may provide a reference basis to design a cross section of a single-hole four-lane highway tunnel in new construction or reconstruction and expansion, thereby ensuring safety and economic efficiency of the cross section forms of the single-hole four-lane highway tunnel.

An anti-corrosion material and anti-corrosion method for submerged floating tunnel pipe section concrete is provided. The anti-corrosion material includes: a base layer material, a middle layer material and a surface layer material. The base layer material is an organosilicon material. The middle layer material is high-strength and high-durability fiberglass reinforced plastic. The surface layer material is a hydrophobic material. The anti-corrosion method includes: preparing fiberglass reinforced plastic; cleaning a surface of a submerged floating tunnel pipe section concrete material, preparing an organosilicon material, and coating the organosilicon material onto the surface of the pipe section concrete material; and preparing a hydrophobic material, and spray-coating the hydrophobic material onto a surface of the fiberglass reinforced plastic. The organosilicon material is adopted to improve the durability of the pipe section concrete and the bonding performance between the fiberglass reinforced plastic and the pipe section concrete.