54results about How to "Reduced lifting capacity requirements" patented technology

The invention discloses a rapid construction method for transverse partitioning and longitudinal sectioning of an urban elevated steel box girder bridge. The rapid construction method particularly comprises the following steps: firstly, determining longitudinal sectioning and transverse partitioning cutting parts, and then, determining longitudinal cutting parts of a steel box girder; transversely partitioning the box girder according to the number of box chambers of the steel box girder, wherein each box chamber serves as a partition; splicing a hoisting unit on a jig, assembling a bottom plate, a transverse diaphragm, a web and a top plate in sequence, and welding the structures; and finally, carrying out hoisting and welding on the site. The hoisting process is carried out from top to bottom in height, from two sides to middle span in longitudinal bridge direction, and from middle to two sides in transverse bridge direction. The rapid construction method disclosed by the invention is capable of reducing the on-site construction time to the maximum limit and reducing the influence on the urban environment; and by virtue of longitudinal sectioning and transverse partitioning, the requirement for the hoisting capacity of hoisting equipment can be reduced, the difficulty of transporting large-section box girders in a city is reduced, and thus the rapid construction method is more suitable for construction of the urban elevated steel box girder bridge.

The invention provides a fabricated reinforced concrete bridge pier. The fabricated reinforced concrete bridge pier comprises a hollow bridge pier shell and cast-in-place core concrete arranged in thebridge pier shell, the bridge pier shell comprises a concrete layer and a reinforcement cage, and the reinforcement cage is arranged in the concrete layer; and the reinforcement cage comprises a plurality of circumferential stirrup meshes and a plurality of vertical steel bars, the multiple circumferential stirrup meshes are equidistantly arranged at intervals in the vertical direction, and the multiple vertical steel bars are equidistantly arranged at intervals along the circumferential stirrup meshes. The invention provides a construction method of the fabricated reinforced concrete bridgepier, the reinforcement cage and formworks are manufactured, then concrete is poured into spaces between the formworks and congealed into a whole so as to form the integrated bridge pier shell, the bridge pier shell is transported to a construction site, and the cast-in-place core concrete is poured into a hollow hole of the bridge pier shell. According to the fabricated reinforced concrete bridgepier and the construction method thereof, the weight is small, the construction period is short, transporting and hoisting difficulty is greatly reduced, multiple construction ways are provided, andoverall performance after the structure is formed is good.

The invention discloses a desert-sand light aggregate concrete fabricated shear wall structure which comprises a foundation, coupling wall columns arranged on the foundation, and coupling beams connected between the coupling wall columns. The coupling wall columns are mainly composed of steel wire nets, thin-wall shape steel, steel wire cages and the like correspondingly. Desert-sand light aggregate concrete is poured on the steel wire nets and the steel wire cages, and the coupling wall columns are connected through asbestos boards, the steel wire nets, the desert-sand light aggregate concrete and the like in a poured mode correspondingly. The desert-sand light aggregate concrete fabricated shear wall structure is light in weight, materials are easy to obtain, the anti-seismic bearing capacity and deformability of components can be reliably ensured, and the good heat-insulating property is also achieved under the situation that the bearing requirement is met. The assembly attributes of simple structure and convenient and rapid transporting and mounting are achieved, and the desert-sand light aggregate concrete fabricated shear wall structure is particularly suitable for remote villages and towns which are insufficient in material supply, low in worker quality and short in technical force in Xinjiang region, and can be self-built by tile teams or farmers of the villages and thetowns.

The invention provides a wheel hub rotating tool for conveniently completing fan impeller assembling. The wheel hub rotating tool comprises a fixed support, a rotating mechanism, a wheel hub tool anda rotating locking device, wherein a wheel hub tool is placed on the fixed support; the rotating mechanism and the locking device are arranged between the wheel hub tool and the fixed support and controlled by an electrical control system; and the equipment wheel hub tool can be freely rotated and locked through the electrical control system. The wheel hub rotating tool has the following advantages that (1) the hoisting feasibility of all blade lifting positions during ship hoisting machine model selection needs to be considered, while the hoisting feasibility of only a single blade lifting needs to be considered through the rotating tool, the lifting performance requirement of equipment is low, and meanwhile, the operating space requirement for a ship deck is low; and (2) by rotating therotating tool, blade lifting is always conducted on the side, close to a transport ship, of a mounting ship, and time is saved.

The invention relates to the technical field of bridge girder manufacturing, in particular to a method for turning over a heavy bridge girder steel tower section. The method comprises the steps that a rotating support is selected or manufactured, a boring-milling machine is selected, and the rotating support is fixed on the boring-milling machine; a supporting steel pier is selected or manufactured and arranged in a work area of the boring-milling machine; a rotating hinge shaft is selected or manufactured, fixed at the front end of the bridge girder steel tower section, and installed on the rotating support; the bridge girder steel tower section is placed on the supporting steel pier; a crane is connected with the rear end of the bridge girder steel tower section; the crane lifts the bridge girder steel tower section, and the front end of the bridge girder steel tower section rotates around the rotating hinge shaft so that the bridge girder steel tower section can be turned over by 0 degree to 90 degrees. According to the method for turning over the heavy bridge girder steel tower section, the rotating support provides some supporting force for the bridge girder steel tower section, the requirement for the lifting capacity of the crane is lowered, and the heavy bridge girder steel tower section can be lifted by utilizing the crane low in lifting capacity.

The invention discloses a pre-tensioned deformed reinforced concrete precast main beam. The pre-tensioned deformed reinforced concrete precast main beam is characterized in that a beam body has an inverted T-shaped section and is composed of a horizontal rectangular compression-resistant part and a vertical rectangular shearing-resistant part; stirrups are embedded in the vertical rectangular shearing-resistant part; parts of the stirrups stretch out of an upper surface of the vertical rectangular shearing-resistant part; U-shaped stirrups are embedded in the horizontal compression-resistant part; U-shaped stirrup upper parts having certain length stretch out of an upper surface of the horizontal compression-resistant part; and steel strands are embedded in the horizontal compression-resistant part. A step of the pre-tensioned deformed reinforced concrete precast main beam having the inverted T-shaped section can be straightly provided with a secondary beam so that secondary beam installation is convenient. In construction, when a temporary support is arranged at a lower part of the secondary beam, no additional rebars are arranged at a loading step.

The invention discloses a rollover template capable of lifting and rolling over, which is mainly used for cast-in-place barrel body structure construction of the building engineering field, and is quick and convenient in construction. The rollover template mainly comprises a beam, reinforcing plates, channel steel, movable templates and U-shaped pliers. The working principle of the roller templateis as follows: mounting reinforcing steel bars and pouring concrete in a cavity formed by a pair of movable templates, loosening buckles at the lower ends of one pair of movable templates after concrete is finally condensed, lifting the U-shaped pliers to upwards turn over the movable templates, enabling the movable templates to de-mould from cast concrete, putting one pair of pin rolls at the upper ends of one pair of movable templates into a third row of U-shaped slots of a flange after upwards turning over one pair of the movable templates by 180 degrees, pressing the third row of bucklesagain, locking one pair of pin rolls at the upper ends of one pair of the movable templates, pouring concrete in the cavity formed by one pair of the movable templates, continuously upwards turning over the templates and pouring concrete with the same method after the concrete is finally condensed until concrete pouring work of next construction stage is accomplished.

The invention discloses a device for shifting hanging basket assembly pieces and a construction method. The device comprises two main beams connected into a whole. Forwards-shifting idler wheels are arranged on the bottom faces of the main beams. A transversely-shifting trolley and a bracket are arranged on the top face of each main beam, the transversely-shifting trolleys are in sliding connection with the top faces of the main beams, and the brackets are fixed on the top faces of the main beams. According to the device, the transversely-shifting trolleys and forwards-shifting devices (the forwards-shifting idler wheels) are used, a heavy main longitudinal beam front section of a hanging basket can be lifted through a first tower crane with high lifting capacity, a light front transverse beam of the hanging basket is lifted through a second tower crane with low lifting capacity, therefore, the requirements for the lifting capacity of the tower cranes when the hanging basket is assembled can be greatly reduced, the use cost of the tower cranes is greatly reduced, and the hanging basket assembly efficiency is improved.

The invention belongs to the technical field of bridge engineering. The invention relates to a cable-crossing crane of a suspension bridge as well as application and a using method of the cable-crossing crane. The cable-crossing crane comprises hoisting units, a hydraulic control unit and a cross beam; the number of the hoisting units is three; the three sets of hoisting units are sequentially connected through the cross beam from left to right; the hydraulic control unit is connected with the middle hoisting unit. According to a three-main-cable suspension bridge in the prior art, during thehoisting construction of a stiffening beam, if a two-supporting-point hoisting mode of a conventional cable-crossing crane is adopted, the requirement on the hoisting capacity of a hoisting unit is very high, and the stiffening beam is largely deformed in the hoisting process. With the cable-crossing crane of the suspension bridge as well the application and using method of the cable-crossing crane adopted, the above problem in the prior art can be solved. According to the cable-crossing crane of the suspension bridge as well the application and using method of the cable-crossing crane, one hoisting unit is arranged at each of the left position, the middle position and the right position, the hoisting unit in the middle shares loads of the hoisting units on the two sides, and therefore, the deformation of the stiffening beam is within a controllable range. The cable-crossing crane has high practical significance and research value.

The invention provides a method for assembling a whole offshore wind turbine at a wharf. In the process of assembling a wind turbine, a main crane is placed on the ground at a extension line of the center line of a transport ship,when impellersare hoisted in accordance with specific conditions (that is,a high slack tide or a low slack tide period) and a certain rotation angle of an engine room, interference between a lifting arm of the main crane and the impellers during hoisting can be effectively avoided, and the bad influence of offshore waves generated during impeller hoisting can be effectively avoided,after the impellersare installed, the impellersare rotated to an inverted Y-shaped state, the interference between the impellers and the lifting arm of the main crane can be further avoided, and the center of gravity of the whole wind turbine can be made to relatively lower at the same time, the fact thatthe interference between a lifting hook and blades of the impellersis not generatedwhen the whole machine is hoisted in an installation position of the offshore wind turbine is met, and collision between the main crane and the blades when the main crane holds upa mast during assembling the impellers on an adjacent station can be further avoided.

The invention provides a method for arranging upper steel bars of a laminated beam in a penetrating mode. The method comprises the steps that A, stirrups and lower steel bars are installed, and a prefabricated layer of the laminated beam is constructed, wherein the positions, close to the overlapped places of both ends of the stirrups of an end portion area of a cast-in-situ column, of the prefabricated layer of the laminated beam are located on the upper part of the prefabricated layer of the laminated beam; B, the prefabricated layer of the laminated beam is installed, and the overlapped places of both ends of the stirrups of the end portion area are opened to form openings for allowing the upper steel bars to be placed; C, the upper steel bars are arranged in a penetrating mode; and D,both ends of the stirrups which are opened are overlapped. According to the method for arranging the upper steel bars of the laminated beam in a penetrating mode, the positions, close to the overlapped places of both ends of the stirrups of the end portion area of the cast-in-situ column, of the prefabricated layer of the laminated beam are located on the upper part of the prefabricated layer of the laminated beam, the overlapped places of both ends of the stirrups of the end portion area are opened after the prefabricated layer of the laminated beam is installed, and the upper steel bars canbe easily inserted into the stirrups, and therefore, the method for arranging the upper steel bars of the laminated beam in a penetrating mode can easily arrange the upper steel bars of the laminatedbeam in a penetrating mode.

The invention discloses an installation assistance system and method for a large-tonnage gravity type anchoring foundation. The system comprises a semi-submerged ship, a hoisting assistance device and hoisting equipment, and the semi-submerged ship is used for bearing the gravity type anchoring foundation; the hoisting assistance device is detachably mounted on the gravity type anchoring foundation; the hoisting equipment is used for hoisting the gravity type anchoring foundation in the submerging process of the semi-submerged ship, the hoisting assistance device generates buoyancy when encountering water to hoist the gravity type anchoring foundation, and the buoyancy generated by the hoisting assistance device is smaller than the gravity of the gravity type anchoring foundation. By the adoption of the installation assistance system and method for the large-tonnage gravity type anchoring foundation, the requirement of the large-tonnage gravity type anchoring foundation for the hoisting capacity of hoisting equipment can be effectively lowered, and the gravity type anchoring foundation can be smoothly installed.

The invention discloses a rollover formwork for a climbing formwork device, and is mainly used for structural construction of cast-in-place cylinders in the field of constructional engineering. By means of the rollover formwork, convenience is brought to construction. The rollover formwork is composed of a transverse beam 10, stiffening plates 2, U-steel 3, movable formworks 12 and bottom beams. According to the working principle, steel reinforcement bars are installed in a cavity formed by the movable formworks, and concrete is poured into the cavity formed by the movable formworks; after final setting of the concrete, fasteners at the lower ends of the two movable formworks are loosened, the two movable formworks are overturned upwards, at this moment, the movable formworks are separatedfrom the poured concrete, after the two movable formworks are overturned upwards 180 degrees, two pins shafts at the upper ends of the two movable formworks are put into U-shaped grooves in the thirdrow in flanges, fasteners in the third row are pressed down, the two pin shafts at the upper ends of the two movable formworks are locked up, concrete is poured into the cavity formed by the movableformworks, after final setting of the concrete, and in the same way, the formworks continue to be overturned upwards, and the concrete is poured until the concrete pouring work during a construction period is completed.

The invention discloses a main girder structure of a streamlined multi-box girder. The main girder structure comprises at least one middle box grinder, two side box grinders, a plurality of connectingbeams, the bottom of the cross section of each middle box grinder is provided with a first streamlined outward projection from two sides to the middle of the bottom, railways are laid on the middle box grinder, the side box grinders are symmetrically distributed on two sides of the middle box grinders, highways are laid on the side box grinders, the bottom of the cross section of each side box grinder close to one side of the corresponding middle box grinder is provided with a second streamlined outward projection, the cross section of each side box grinder far away from one side of the corresponding middle box grinder is in a shape of a sharp corner, the connecting beams are vertically distributed at intervals and used for horizontally connecting with adjacent side box grinders and middle box grinders or middle box grinders and middle box grinders, and each connecting beam comprises at least one unit connecting beam. The invention further discloses a main grinder of the streamlined multi-box girder. The main girder structure of the streamlined multi-box girder improves wind-resistant stability.

The invention relates to a split type hoisting method for a land wind turbine generator set. A cabin of a 3.XMW set is divided into a cabin body and a main gear box for hoisting, so that the weight ofeach part is controlled within 80 t; and the steps of part placement, detection and the like in the hoisting process are further combined, so that split type hoisting of the wind turbine generator set is achieved, the requirement that the total weight of large single-vehicle transportation cannot exceed 100t according to the current national policy can be met, and the hoisting requirement of mainstream large cranes in the market in the prior art can also be met; and meanwhile, the hoisting frequency of a main crane is reduced, the hoisting period of the single wind turbine generator set is shortened, and the hoisting efficiency of the wind turbine generator set is improved.

The invention provides a single-row reinforcement sheet with fiber concrete on frames and common concrete in the middle and a manufacturing method, and belongs to the field of manufacturing of concrete slabs in building structure engineering. Fibers meeting different structure requirements are adopted by the fiber concrete according to design requirements, the common concrete is adopted except the frames of the sheet, the strength and diameter of reinforcement meshes arranged on the frames are greater than those of steel bars of an orthogonal steel wire mesh in the middle, and therefore the sheet with the fiber concrete on the frames and the common concrete in the middle is formed. The steel bars are arranged in hooks formed by bending steel wires extending from the four sides of the steel wire mesh, and a complete reinforced mesh is precast. The fiber concrete is poured on the periphery of the sheet, and the common concrete is poured in the sheet. The initial cracking resistance of the concrete sheet is improved, shrinkage plastic cracks at the early stage of the concrete are reduced, and the single-row reinforcement sheet has great significance to solution of the prevalent problems that current concrete sheets are low in sheet frame strength, prone to collision loss and high in manufacturing cost. The sheet is easy to construct, the using number of formworks and supports in construction can be greatly reduced, operation intensity of workers is lowered, and the amount of labor used in engineering is reduced.