A self-supporting reinforcement system for the concrete lining of the inner shell of a tunnel construction. At least one object is that of supporting the outer shell or rock wall of a tunnel construction. According to an embodiment of the invention, this is achieved by tension brackets or tension rings, formed from one or more bracket segments made of individual reinforcing steel bars. M-shaped tensioning support bodies having a connecting region to the tension brackets, and support arms for the supporting bracing, establishing the spacing with respect to an outer shell or rock wall, of the bracket and spacers on the tensioning support bodies and between the outer layer and an inner layer of the reinforcement.

A method of treating tunnel collapse includes mounting a shield plate, a column, a support column to form a combined support and moving the combined support onto an operation platform, lifting up the combined support, and enabling the height of canopy to be greater than the height of an initial supporting arch. Actively contacting a surface of a collapse cavity by a fixed support column and bearing a load, and lifting a movable support column to the top of the collapse cavity and bearing a load. Mounting an initial supporting arch, and welding the initial supporting arch with the support column. Removing a hydraulic prop after the support column contacting the initial supporting arch is cut off and the load of the shield plate is transferred to a supporting shed. Mounting an exhaust pipe and a filling material pumping pipe, and pumping a filling material into a collapse cavity space.

An arrangement method for deformation of a locked patch crack of a rock slope, includes: connecting a filling pipeline on a bladder-type monitoring probe to a mortar guiding pipe through an automatic locking and unlocking device, clamping a portion to be clamped on a bladder by a clamping assembly, driving a clamping driving mechanism to move towards an adit by a push driving mechanism, and pushing the bladder into the adit; injecting cement mortar into the bladder through the mortar guiding pipe by utilizing a high-pressure injection machine to expand the bladder until an upper surface and a lower surface of the bladder abut against an upper surface and a lower surface of the adit, and making a monitor on the bladder abut against the upper and lower surfaces of the adit; and arranging a plurality of bladder-type monitoring probes in an array in the adit.

A method for blocking mine water inrush includes: grouting first slurry into an interface between the quaternary aquifer and the weathered bedrock aquifer in a fracture grouting manner until a first preset condition is met; forming a first water-resisting cushion after the first slurry is solidified; drilling a curve branch drill hole in the surface horizon downward; grouting second slurry into the curve branch drill hole in a downward grouting manner until a second preset condition is met; forming a second water-resisting cushion after the second slurry is solidified; grouting third slurry onto a top of the first water-resisting cushion in an upward grouting manner until a third preset condition is met; forming a third water-resisting cushion after the third slurry is solidified; wherein the third water-resisting cushion is located on the top of the first water-resisting cushion.

A method for blocking mine water inrush includes: grouting first slurry into an interface between the quaternary aquifer and the weathered bedrock aquifer in a fracture grouting manner until a first preset condition is met; forming a first water-resisting cushion after the first slurry is solidified; drilling a curve branch drill hole in the surface horizon downward; grouting second slurry into the curve branch drill hole in a downward grouting manner until a second preset condition is met; forming a second water-resisting cushion after the second slurry is solidified; grouting third slurry onto a top of the first water-resisting cushion in an upward grouting manner until a third preset condition is met; forming a third water-resisting cushion after the third slurry is solidified; wherein the third water-resisting cushion is located on the top of the first water-resisting cushion.

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.

This invention discloses a model test apparatus and method for shield post-wall grouting and tube sheet uplift under high water pressure conditions, comprising main body box, tension apparatus, shield system, grouting system, ground stress loading system, water injection system, and monitoring system. The main body box comprises the shield shell system and model soil inside. The ground stress loading system and water injection system realize the simulation of the complex underground soil and muddy water environment by applying stress and water pressure to the model soil inside the main box. While the tension apparatus makes the shield shell moving forward, the grouting system injects slurry into the gap between the shield shell and the tube sheet. The integrated model test of visual shield grouting and tube sheet uplift, the real-time multi-physical field responses, and the longitudinal deformation mechanism have been realized and revealed under high water pressure conditions.

A composite support system based on a steel-concrete (concrete-filled steel tube) support and a shotcrete arch includes an anchor mesh layer provided on an inner wall of a roadway. A flexible compressible layer is provided on the outer side of the anchor mesh layer; a support frame is erected on the outer side of the flexible compressible layer; reinforcement meshes are respectively arranged on an inner side and an outer side of the support frame; the support frame and the reinforcement meshes form a framework to construct an arch spray layer; the reinforcement meshes and the support frame are embedded into an arch structure to form a rigid layer; the flexible compressible layer is provided between the rigid layer and the anchor spray layer. When the flexible compressible layer is compressed, the flexible compressible layer is deformed toward a reserved deformation space for a yielding purpose.

A composite support system based on a steel-concrete (concrete-filled steel tube) support and a shotcrete arch includes an anchor mesh layer provided on an inner wall of a roadway. A flexible compressible layer is provided on the outer side of the anchor mesh layer; a support frame is erected on the outer side of the flexible compressible layer; reinforcement meshes are respectively arranged on an inner side and an outer side of the support frame; the support frame and the reinforcement meshes form a framework to construct an arch spray layer; the reinforcement meshes and the support frame are embedded into an arch structure to form a rigid layer; the flexible compressible layer is provided between the rigid layer and the anchor spray layer. When the flexible compressible layer is compressed, the flexible compressible layer is deformed toward a reserved deformation space for a yielding purpose.

Provided are a system and construction method of a single-layer lining tunnel structure based on a mine-tunnelling method. With the single-layer lining tunnel structure, a structural rigidity and durability of the tunnel are improved. A construction process of sprayed concrete is improved, specifically, compactness agent and durability enhancing fiber are added to concrete to improve the compactness of concrete, and a special spraying process is adopted to reduce a bound rate of the concrete, and thus to improve the impermeability of sprayed concrete to reach a impermeability level of waterproof concrete. Steel fiber, cellulose fiber, synthetic fiber and other materials are added into the concrete can improve the tensile strength, crack resistance and durability of the concrete.