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.

The frost-resistant assembled initial support structure of the tunnel for supporting a surrounding rock includes a bearing layer, an elastic compressible structure and an inflatable airbag. A gap space is formed between the bearing layer and the surrounding rock, and the inflatable airbag and the elastic compressible structure are provided in the gap space; and the inflatable airbag after being inflated and the elastic compressible structure jointly fill up the gap space. A construction method includes providing the bearing layer in the tunnel, and forming the gap space between the bearing layer and the surrounding rock; providing the inflatable airbag and the elastic compressible structure in the gap space; and inflating the inflatable airbag and filling up the gap space with the inflatable airbag and the elastic compressible structure.

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 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 method of incorporating a compressible cementitious composition into a subterranean structure having a tunnel including: (a) incorporating a compressible cementitious composition into annular gaps formed around the tunnel of the subterranean structure, and (b) allowing the compressible cementitious composition to cure to a hardened cementitious material within the annular gaps. Further, the compressible cementitious composition includes: (i) water; (ii) a cementitious material; and (iii) a rubber material, in which the rubber material comprises at least 15 weight % of the composition based on the total weight of the composition. A subterranean system and compressible cementitious composition is also included.

A method of treating tunnel collapse includes leveling a collapse body and moving a pavilion support under the collapse cavity, lifting a shield plate until a lower edge of the shield plate surpasses a contour line of an initial supporting arch of a tunnel, connecting a bottom column and inserting a padding plate under a column. If the hydraulic prop retracts, the column, the bottom column, the padding plate and the hydraulic prop bear a load from the shield plate. Mounting and connecting the initial supporting arch, welding the intersection point of the column and the initial supporting arch, cutting off the column in the initial supporting arch. Transferring the load of the shield plate from the pavilion support to an initial supporting shed, spraying fast-setting concrete to a grid arch to form a closed shell, and pumping filling material to fill the space of the collapse cavity.

The disclosure belongs to the field of tunnel construction technologies, and more particularly, relates to a construction method for making a water-rich sand layer shield over cross an existing line and underneath cross a sewage push pipe at a close range. The method specifically includes the following steps of: S1) before construction, using MIDAS GTS NX software and FLAC3D to optimize a tunneling scheme antecedently by numerical simulation to determine a part of unfavourable stress; S2) tunneling a test section, the test section being a stratum crossing a front shield direction by 45 m to 60 m; and S3) performing shield crossing construction, wherein a shield crossing construction process includes the steps of: 1) controlling a soil pressure; 2) controlling a shield thrust; 3) performing synchronous grouting; 4) performing a ballasting measure in a tunnel; and 5) performing automatic monitoring in the tunnel.

A method for coating a support with a lightweight insulating shotcrete, includes preparing the shotcrete by mixing, in predetermined proportions, at least a fibrous aggregate, a binder and water; pouring the prepared shotcrete in a tank; having at least one outlet; continuously moving the wet shotcrete in the tank until it reaches the or each outlet; sucking the wet shotcrete along a feeding pipe linking the outlet of the tank to a spraying gun, with a Venturi hose fed with pressurized air, included in the spraying gun; spraying the sucked shotcrete on the support with the spraying gun.

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.