5results about How to "Increase safety reserve" patented technology

The utility model relates to the technical field of fabricated steel structure, disclose a kind of fixed structure and the connecting joint of modular steel structure, fixed structure includes at least one first connecting piece, first connecting piece includes plug-in board, connecting plate and support plate, at least one horizontal direction extension slot is provided on plug-in board, connecting plate is fixed in the top side of plug-in board;The plug-in board of each slot lower part is fixed with support plate, and support plate is in contact with steel beam flange plate up and down.The connecting joint of modular steel structure includes fixed structure and second connecting piece, first connecting part inserts and is tightly attached on the inner wall of upper column;Second connecting part inserts and is tightly attached on the inner wall of lower column;Steel beam flange plate inserts each slot, connecting plate is fixedly connected with second connecting piece, and steel beam flange plate is in contact with support plate up and down.The utility model structure is simple, connection is reliable, easy to disassemble, solve the technical problem of the load bearing capacity of weakening steel beam and steel column in the prior art hole, reduce the safety of connecting joint.

The application belongs to the technical field of fabricated wall construction, and particularly relates to a combined ALC window opening outer wall structure and a construction method, comprising a plurality of adjustable connecting assemblies, a plurality of limiting stoppers and at least one ALC wallboard, pretreatment work such as ALC wallboard anchor planting and flat steel welding is completed on the ground in advance, which maximally reduces the content and time of high-altitude work, and through systematic innovation, the construction safety, installation quality and work efficiency are successfully improved in cooperation, the core of which is to transform high-risk and high-difficulty work at high altitude into a safe and controllable prefabrication process on the ground, and relying on an adjustable, anti-loose and strengthened integrated connecting and positioning system, the drawbacks of traditional methods are fundamentally overcome, and the application has the comprehensive advantages of intrinsic safety, precision and efficiency, firmness and reliability, and provides an advanced solution for the construction of the window opening of the fabricated building outer wall.

The invention discloses a production method of a hot-rolled steel plate for a high-grade steel pure hydrogen conveying pipeline. The steel plate comprises the following chemical components in percentage by weight: 0.03-0.06% of C, 0.10-0.20% of S i, 1.10-1.40% of Mn, less than or equal to 0.008% of P, less than or equal to 0.001% of S, 0.040-0.050% of Nb, 0.030-0.040% of V, 0.005-0.020% of Ti, 0.20-0.30% of Cr, 0.10-0.20% of N i, 0.020-0.040% of Al, less than or equal to 1.5 ppm of H, less than or equal to 20 ppm of O, less than or equal to 40 ppm of N and the balance of Fe and impurities. And by combining low-temperature heating and rolling of the plate blank, the produced steel plate has high strength and good hydrogen embrittlement resistance, and the requirements of steel for the high-pressure pure hydrogen conveying pipeline are met.

This utility model relates to the field of bridge engineering technology, and in particular to a cable-stayed bridge with a Möbius strip-shaped spatial arch tower, comprising a tower, piers, a bridge deck, and a cable system. The bridge deck is erected above the piers, which include main piers and auxiliary piers. The tower consists of a first arch tower and a second arch tower, with their bottom ends overlapping and fixed to the main pier, forming a solidified system with the bridge deck. A structural ring is provided between the first and second arch towers. The cable system includes indirect force-transmitting cables, direct force-transmitting cables, and bridge deck cables, forming a dual force-transmitting mechanism. This utility model incorporates the Möbius strip shape into the tower design, achieving a unity of "infinite loop" visual effect and structural reliability through the structural ring and dual force-transmitting system. It breaks the traditional geometric paradigm of bridge towers, providing a cable-stayed bridge paradigm that combines aesthetic value and structural reliability for urban landmark bridges.

The invention discloses a sidewalk limited area profile steel cantilever bridge based on space optimization and a construction method thereof, and belongs to the technical field of cantilever sidewalk construction.The sidewalk limited area profile steel cantilever bridge comprises cantilever units arranged in the longitudinal direction of a road, and each cantilever unit comprises a profile steel main beam arranged in the transverse direction; an anchoring section of the profile steel main beam is arranged in a road structure and is wrapped by concrete to form a concrete anchoring body, a reinforcement cage is arranged on the outer side of the anchoring section, the reinforcement cage is integrally embedded in the concrete anchoring body, and bending moment and shearing force generated by a cantilever section of the profile steel main beam form a multi-path collaborative stress system through the profile steel main beam and the reinforcement cage. And the load is transmitted to the original road structure, so that the safe overhanging arrangement of the sidewalk is realized under the condition that a lower foundation does not need to be arranged. The problems that under the condition that the construction space of a sidewalk is limited, especially in areas close to rivers, valleys and other areas with limited space, the difficulty is large, and the manufacturing cost is high when a concrete structure is constructed from the valley bottom are solved.