A modular tunnel forming apparatus includes at least two modules which are arranged one behind the other in the longitudinal direction of the tunnel formwork device and are detachably connectable to one another. The at least two modules each have a frame part, and the frame parts of the interconnected modules form a frame of the tunnel formwork device. At least two support structures, which can be connected to the frame of the tunnel formwork device and are spaced apart from one another in the longitudinal direction of the tunnel formwork arrangement, are provided for supporting the frame on a tunnel floor. The frame carries at least two support cylinders at at least two positions spaced apart from one another in the longitudinal direction, which support cylinders can be connected to longitudinal beams extending in the longitudinal direction, which longitudinal beams carry tunnel formwork elements of the tunnel formwork device.

A rapid construction method for a secondary lining of a small-section tunnel includes steps of: transporting and store secondary lining steel bars to a designated position in the tunnel with a steel bar transport vehicle and a wheel type dump truck; after the tunnel is cleaned, simultaneously constructing the secondary lining from two ends to a middle of the tunnel; constructing a lower inverted arch with a customized inverted arch formwork and then constructing an upper arch wall with a plurality of portal arch wall formwork trolleys; wherein the portal arch wall formwork trolleys form a set, and are connected by hinges, so as to construct in a curve tunnel. The rapid construction method has a long single construction section, and procedure connection is compact, thereby realizing rapid and efficient construction of the secondary lining.

A roller bracket having a base, a raising and lowering mechanism, a platform, and horizontal and vertical rollers. The base is attached to the vertical face of a starter wall at a level to provide a desired height for a concrete ceiling. With the platform in the raised position, the bottom edge of a tunnel form is lowered between the vertical roller and the starter wall onto the horizontal rollers. A wedge is driven between the vertical roller and the tunnel form to seal the tunnel form against the starter wall. After concrete has been poured, retained by the seal, and cured to form the concrete walls and ceiling, the mechanism can lower the platform to strip the tunnel form from the tunnel. The tunnel form can then be rolled away on the horizontal rollers while being retained on the horizontal rollers by the vertical roller and the starter wall.

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).

Disclosed is a formwork for producing concrete products including at least one supporting beam with an axis of extension, at least one panel bendable around a transverse direction with respect to the axis and at least one adjustment device adapted to connect the panel to the beam and to vary the curvature of the panel between a flat undeformed condition and curved condition, where the outer surface is convex or, if necessary, concave, wherein the adjustment device is connected at least at one intermediate point of the panel and at least at one edge point, positioned at a lateral edge substantially parallel to the direction of curvature, in order to simultaneously move the points to vary the curvature of the outer surface of the panel.

A tunnel formwork device includes a frame and at least two support structures connectable to the frame of the tunnel formwork device and spaced apart from each other in the longitudinal direction of the tunnel formwork device for supporting the frame on a tunnel floor. The frame carries at least two hydraulic support cylinders at at least two positions spaced apart from one another in the longitudinal direction, which support cylinders can be connected to longitudinal beams running in the longitudinal direction. The longitudinal beams carry tunnel formwork elements of the tunnel formwork apparatus. At least one lifting device is arranged on the frame, which lifting device carries at least one working platform. The lifting device has a lifting drive for moving the working platform relative to the frame.

A formwork for the production of concrete articles includes: a supporting beam with a development axis; a panel which has an outer surface designed to be in contact with a concrete casting, the panel being connected on an inner side to the beam and being curvable around a transverse direction relative to the development axis of the beam; and a connector, present in the area of one end of the beam, allowing connection of the beam to another structure. The connector includes: a slide connected to the beam to perform a translation or rotation movement, or both, the slide carrying a first fastener connecting the beam to another adjacent beam, and a second fastener connecting the beam to a supporting structure; and an adjustment mechanism which acts on the slide to move it continuously between a retracted position and an extended position, adjusting its position relative to the beam.

A rapid construction method for a secondary lining of a small-section tunnel includes steps of: transporting and store secondary lining steel bars to a designated position in the tunnel with a steel bar transport vehicle and a wheel type dump truck; after the tunnel is cleaned, simultaneously constructing the secondary lining from two ends to a middle of the tunnel; constructing a lower inverted arch with a customized inverted arch formwork and then constructing an upper arch wall with a plurality of portal arch wall formwork trolleys; wherein the portal arch wall formwork trolleys form a set, and are connected by hinges, so as to construct in a curve tunnel. The rapid construction method has a long single construction section, and procedure connection is compact, thereby realizing rapid and efficient construction of the secondary lining.

A full-circle secondary lining inverted arch construction formwork system for a long-distance tunnel and a formwork transporting method adopt a customized steel formwork, a steel pipe support, and a turn buckle. The steel pipe support is arranged on the longitudinal main edge, and is provided between the longitudinal rails and a primary lining for supporting vertical buoyancy. The turn buckle is arranged between two sides of the formwork and a reserved steel bar for resisting horizontal load generated during asymmetric pouring. A cantilever gantry crane and a transportation flat car are used for formwork transporting, wherein travel rails of the cantilever gantry crane and the transportation flat car are integrated on the customized steel formwork, and there is no other rail. According to the present, the formwork has high strength and rigidity, the formwork system is simple.

A hydraulic end die of a tunnel secondary lining trolley, comprises a trolley side die-end die assembly (6) and a trolley top die-end die assembly (10). The trolley side die-end die assembly is fixed at an outer ring of a trolley side die assembly (2) by means of a trolley side die-end die fixing device (3); the trolley top die-end die assembly is fixed at an outer ring of a trolley top die assembly (11) by means of a trolley top die-end die fixing device (8); and the trolley side die-end die assembly and the trolley top die-end die assembly are connected to a hydraulic control system by means of a trolley side die-end die hydraulic telescopic device (4) and a trolley top die-end die hydraulic telescopic device (9) respectively. Further disclosed is a construction method for a hydraulic end die of a tunnel secondary lining trolley. The hydraulic end die of the tunnel secondary lining trolley and the construction method therefor can conveniently and quickly mount and dismount the trolley end dies while accelerating the construction progress of tunnel secondary lining construction, thus reducing construction costs and improving labor productivity.