43results about How to "Reduce demolition costs" patented technology

The invention discloses an environment-friendly demounting method of gas tank. The environment-friendly demounting method of gas tank comprises the steps of treating the chemical residues in the tank,separating the tank top in a high-altitude manner, declining the tank top, fixing the tank top, cleaning the chemical residues on the tank wall, cutting the wall plates and handling the wall plates and the like. The invention decreases the dismounting cost of the gas tank, improves the dismounting efficiency, realizes separation of working district and surrounding environment, ensures safety andenvironment protection in the dismounting process, avoids serious water system and environment pollution accidents occurring in the dismounting process, and does not influence the regular production of surrounding factories.

The invention discloses a high-altitude dismantling method of inside-climbing tower crane for towering structure construction, which can effectively lower the dismantling cost of an inside-climbing tower crane and lower dismantling operation risk. The high-altitude dismantling method of inside-climbing tower crane for towering structure construction firstly dismantles a cargo boom and a balance arm and then dismantles a tower body; the derrick mast mechanism with a strut bar and a hoisting line guide mechanism is arranged on the cargo boom and the balance arm; the derrick mast mechanism and the hoisting line are used to dismantle the cargo boom and the balance arm by sections from outside to inside. The derrick mast mechanism is adopted to operate on the cargo boom and the balance arm to dismantle the cargo boom and the balance arm, and does not need to arrange other auxiliary equipment on a building so as to greatly lower the dismantling cost of the tower crane and improve the removing work efficiency; the last quarter tenon end parts of adjacent two cargo booms and adjacent two balance arms are arranged into circular arc structure, thus improving stability and safety in the dismantling process; the method is especially suitable for being popularized and used in dismantling various inside-climbing tower cranes.

The present invention relates to the technical field of tunnel construction, in particular to a method for dismantling an inverted arch, comprising the following steps: Step 1: setting a plurality of first blastholes perpendicular to the surface of the inverted arch, and the first blastholes are arranged along the transverse direction of the tunnel and the longitudinal direction of the tunnel Arrangement, setting a detonator in the first blast hole; step 2: detonate the detonator in batches and then remove the inverted arch, and the mileage of the inverted arch removed by each detonation is less than one-third of the total mileage of the secondary lining in the demolition area. In the present invention, the inverted arch mileage of each detonation demolition is designed to be less than one-third of the total mileage of the secondary lining in the demolition area, so that the structure of the secondary lining will not be damaged during each detonation demolition, thereby eliminating the need for further The rebuilding of the secondary lining reduces the cost of demolition and reconstruction, and speeds up the construction progress.

The invention discloses a non-excavation reverse dismantling method for an ultra-deep vertical shaft. The non-excavation reverse dismantling method comprises the following steps that (1) sealing, water stopping and reinforcing are conducted on a soil body around the ultra-deep vertical shaft and within a set range below the bottom of the ultra-deep vertical shaft; (2) an observation and emergency standby well is drilled in the periphery of the outer side of the reinforced soil body around the vertical shaft; (3) dismantling the internal structure of the vertical shaft layer by layer from top to bottom to guarantee a dismantling working face; when the internal structure of the vertical shaft is dismantled, the supporting structure mainly comprising the vertical shaft outer wall structure is dismantled layer by layer and confirmed to meet the design requirement layer by layer; (4) after the reinforced soil body below the vertical shaft reaches the design strength, a vertical shaft bottom plate is dismantled; (5) timely backfilling and tamping after the bottom plate of the vertical shaft is broken; (6) vertical ring-dividing dismantling is conducted from the bottom of the vertical shaft, and transverse first ring blocks are symmetrically dismantled; (7) timely backfilling and tamping within the dismantling depth range; and (8) the steps (6)-(7) are repeated, and ring-by-ring dismantling and ring-by-ring backfilling are conducted from bottom to top till dismantling and backfilling are completed. The method is simple in construction, high in efficiency and capable of saving cost and shortening the construction period.

The invention discloses a suspended magnetic levitation traffic rail system which comprises a supporting column. A rail beam with a downward opening is fixedly arranged at the top of the supporting column, lower fixed plates for surrounding a lower opening of the rail beam into a semi-enclosed structure are arranged on two sides of the opening of the rail beam, F-shaped steel rails for matching with U-shaped electromagnets of a magnetic levitation vehicle suspension frame system are fixedly arranged on the lower fixed plates, motor sensing plates for matching with linear motors of the magneticlevitation vehicle suspension frame system are fixedly connected on the lower surfaces of the lower fixed plates, and a power supply system for supplying power to a magnetic levitation vehicle is arranged in the rail beam. The invention further provides a suspension frame system for matching with the rail system, a suspended magnetic levitation vehicle comprising the suspension frame system and asuspended magnetic levitation system comprising the rail system and the suspended magnetic levitation vehicle. The suspended magnetic levitation system has the advantages of low cost and noise, highsafety and the like.