6results about How to "Low construction requirements" patented technology

The present application relates to a kind of double-column pier system and construction method of quick construction in high-risk seismic area, belong to the technical field of fabricated structure engineering.The double-column pier of construction includes cap beam, pier column, pile cap, pile.The pier column and cap beam are connected by grouting steel pin and slot combination, and the pier column and pile cap are connected by socket and steel pin combination, and the new socket connection node structure of pier column-cap beam / pile cap can better realize mechanical transmission, guarantee the connection reliability and seismic safety of bridge node, the recess of corrugated shape is arranged in the pile cap, and shear stud is arranged below the pier column, which can improve the connection reliability between the pier column and the pile cap, the socket depth of the double-column pier can be reduced to 0.5d by this connection method, and the top grouting method is used to ensure the grouting density.The present application can realize convenient, quick prefabrication and assembly, and has good seismic performance, which guarantees the seismic safety of the system.

The utility model provides a folding type protective air-tight door which comprises a door frame wall and a door leaf assembly, the door leaf assembly comprises a plurality of door leaf units, and a first hinge and a bolt mechanism are arranged between every two adjacent door leaf units. The first hinge and the bolt mechanism are located on the two sides of the door leaf unit respectively. The bolt mechanism comprises bolts and bolt seats, the bolt seats are arranged on the two adjacent door leaf units respectively, and bolt holes are formed in the bolt seats; when the door leaf assembly is in an unfolded state, the bolt is inserted into the bolt seat of the adjacent door leaf unit; and when the door leaf assembly is in a folded state, the bolt is pulled out from the bolt seat of the adjacent door leaf unit. The door leaf assembly is formed by connecting the door leaf units through the hinges, and when the plug pins are pulled out, the door leaf units can be folded in a Z shape; the door leaf assembly can be folded when opened, the space reserved for door leaf movement is greatly reduced, the door leaf assembly is particularly suitable for underground civil air defense engineering with limited space, and the flexibility and practicability of overall space planning are improved.

A kind of sealing tool for modular integrated building flue interface includes flue socket sleeve, fine stone concrete filling block and bolt, flue socket sleeve includes square sleeve and square steel plate, the bottom of square sleeve is welded above square steel plate, the center position of square steel plate is provided with the through-hole matched with the shape of square sleeve bottom, four top corners of square steel plate are provided with threaded hole, first fine stone concrete filling block is arranged between upper module box bottom plate and upper flue, second fine stone concrete filling block is arranged between lower module box top plate and lower flue, flue socket sleeve is arranged between upper module box and lower module box, flue socket sleeve is fixed above second fine stone concrete filling block, lower flue and wall membrane by bolt;The utility model solves the technical problem that the interface of the upper flue of upper module box and the lower flue of lower module box appears smoke leakage when module box is spliced in concrete modular integrated building.

This invention relates to a method for non-explosive pyrolysis to enhance coal permeability and implement forced roof caving, belonging to the field of coal mine safety technology. The method involves injecting a pyrolysis agent into a borehole, which reacts, solidifies, and expands, generating expansion pressure that causes the coal or rock mass to crack, forming numerous secondary fractures. This improves the permeability of the coal or reduces the strength of the roof strata. Application scenarios include permeability enhancement of inclined coal seams, and permeability enhancement and forced roof caving of near-horizontal or horizontal coal seams. This invention utilizes the property of the pyrolysis agent itself—reaction, solidification, and expansion—to create secondary fractures in the coal (rock) mass, significantly improving coal permeability or reducing rock strength. It involves minimal electromechanical equipment and offers significant technical and economic benefits. For coal permeability enhancement operations in longwall mining faces, it strictly distinguishes between inclined, gently inclined, or near-horizontal coal seams, and differentiates the arrangement of process boreholes and gas drainage boreholes. The engineering workload is low, eliminating the need for blasting operations, and safety is extremely high.

The invention relates to the technical field of steel structures, in particular to an assembly type steel structure beam-column joint adopting a friction type high-strength steel joint, which comprises a steel column, and a connecting plate is arranged on the side surface of the steel column; threaded holes are symmetrically pre-formed in the upper side and the lower side of the end part of the steel beam; the friction type high-strength steel connector comprises an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate are both vertically and fixedly connected to the side face of the connecting plate, and the end of the upper clamping plate and the end of the lower clamping plate are each provided with a straight notch corresponding to a threaded hole in the end of the steel beam. According to the assembly type steel structure beam-column joint adopting the friction type high-strength steel joint, a large amount of energy can be dissipated through friction slippage of a bolt connection interface under the action of an earthquake or a reciprocating load through the friction layer on the connection interface of the upper clamping plate and the lower clamping plate, so that pressure bearing damage of a bolt hole wall or shear brittle failure of a bolt is avoided; and the ductility and the energy dissipation capacity of the joint are remarkably improved, so that the anti-seismic safety of the whole structure is enhanced.

The utility model discloses a kind of multifunctional ecological revetment blocks for river regulation, belong to the technical field of hydraulic engineering construction, the block includes block body and wedge, block body four side surface structures are same, are equipped with tenon, mortise and half hole, when arbitrary two side surfaces are spliced, tenon is embedded mortise, vertical wedge hole is formed in its half hole alignment, when construction, first assemble block to form revetment level, then the conical frustum wedge of same material is driven into wedge hole, wedge uses its wedge effect to generate huge radial pressure, adjacent block is locked transversely, while its lower end is deeply into foundation, provide vertical anchoring force, the utility model realizes the " transverse locking, vertical anchoring " of revetment structure, integrality, stability and anti-collapse ability are very strong, and construction is convenient, ecological friendly, with very high popularization value.