44results about How to "Lower beam height" patented technology

The invention belongs to the technical field of building engineering and particularly relates to an integral assembling type building system and an installing method. The integral assembling type building system is characterized by comprising prefabricated steel reinforced concrete combination columns, prefabricated steel reinforced concrete combination beams, prefabricated reinforced concrete slabs, a prefabricated light integral inner wall and a prefabricated concrete heat preservation outer wall which are assembled together. The building system has the beneficial effects that all the members are prefabricated in a factory, quality is controlled conveniently, and the construction difficulty caused by outdoor weather changes can be reduced. Moreover, splicing is carried out on site, and installing is safe, fast and convenient. The recycle rate of formworks is high, work for the formworks and frame pipes on site is avoided, the number of times of use and consumption of the formworks and frame pipes are reduced, on-site labor is saved, the on-site dust raise phenomenon is improved substantially, the influence on the environment is small, and environmental pollution is reduced.

The invention discloses a square steel pipe fabricated column-prefabricated superposed beam integrally-fabricated frame and a construction method. The frame comprises a square steel pipe with inner and outer ribs, a square steel pipe casing with connecting wing plates and a prefabricated superposed beam. The square steel pipe is formed by rolling once, a thin centrifugally-produced concrete protective wall is arranged inside the square steel pipe, and high-performance concrete wraps the square steel pipe, so that a square steel pipe fabricated column is formed. The square steel pipe casing with the connecting wing plates is used for vertical connection between one upper square steel pipe fabricated column and one lower square steel pipe fabricated column as well as connection between the prefabricated superposed beam and the square steel pipe fabricated column. Short I-beams are arranged at the ends of the prefabricated superposed beam, and the prefabricated superposed beam is connected with the connecting wing plates on the square steel pipe casing through high-strength bolts. An engineered cementitious composite or fiber reinforced cement composite is poured in beam-column joint connection areas. The concrete fabricated superposed beam is connected with prefabricated floor slabs as well as the prefabricated floor slabs are connected both through fiber reinforced composite plastic boards. A prefabricated house has the advantages of reasonable stress, convenience in construction, high joint ductility, good endurance and anti-seismic performance and the like.

Provided is a pre-tensioned prestressed composite beam, which is an I-shaped beam composed of H-shaped steel and concrete, the web plate of the H-shaped steel is provided with trapezoidal holes (14) at intervals, the upper flange and the lower flange of the H-shaped steel are welded with shearing nails, the outer periphery of the lower flange is enclosed with concrete to form a steel-concrete lower flange (4), and the inside of the steel-concrete lower flange is embedded with prestressed steel twisted wire by pretensioning method. The manufacturing method of the composite beam is that: a steel plate is cut into two tooth-shaped plates along tooth-shaped line to be respectively as the trapezoidal hole plates of the H-shaped steel flange, the trapezoidal hole plates are welded with steel plates to form the web plate, the web plate is welded with the upper flange and the lower flange to form the H-shaped steel (1) having trapezoidal holes, the H-shaped steel is put on a base surface with the lower flange downward, the two sides of the lower flange are provided with side molds, a stirrup (7) is arranged and steel twisted wires (3) are longitudinally fastened between the two side molds, the steel twisted wire is tensioned to tensioning state, the concrete for enclosing the H-shaped lower flange is poured and tamped between the two side molds, the steel-concrete lower flange (4) is formed after demolding, and the steel twisted wire at tensioning state is loosened after the concrete reached to predetermined strength and is cut off at predetermined position. The invention is suitable for beams of buildings.

The invention discloses an open-cut type non-column large-span arched subway station structure as well as a design and construction method and relates to the field of subway and underground engineering as well as underground pipe gallery construction. The structure comprises a bottom plate, side walls, middle plates, middle beams, arched plates, arched beams, reinforcing tips and prestressed cables; the two side walls in parallel are oppositely arranged on the bottom plate; the multiple arched beams are evenly arranged in the passage direction; one arched plate is arranged between every two arched beams; the arched plates located on two sides of the same arched beam are connected with each other; one prestressed cable is arranged between two arch feet of the same arched beam; the middle beams are arranged in the middles of the two side walls; and one middle plate is arranged between the every two adjacent middle beams. The method is as follows: the prestressed cables are anchored and tensioned among the bottom plate, the side walls and the middle plates, among the middle beams, the side walls and the arched beams, among the arched plates, among the reinforcing tips and top ends of the side walls. With the structure and the method, the carrying force of end weak areas and the overall rigidity are improved, the lost height of the arched beams is increased, the beam height is reduced, the dead weight is reduced, and the phenomena of concrete cracking on lower edges and crushing on upper edges of the beams are avoided.

The invention discloses a long-span steel-concrete composite bridge structure and construction process thereof. Thus, the problems in the prior art of restricted bridge span and large integral steel using amount of bridges can be solved. The bridge structure and construction process can realize factory prefabrication and have beneficial effects of saving construction periods and steel using amount. The schemes include as follows: the bridge structure includes a steel main beam, a concrete bridge deck and bridge piers; the steel main beam includes multiple sections which can be assembled; the steel main beam adopts a box type section structure in a width direction; the two sides of the box type section structure are provided with outer longitudinal beams connected to the box type section structure; the concrete bridge deck is arranged on the top of the steel main beam and connected to the steel main beam; and steel diagonal bracings are arranged between the bridge piers and the steel main beam.

The invention relates to a pre-tensioned prestressed reinforced concrete precast beam which comprises a beam body and prestressed steel strands which are buried in the beam body and serve as main bars, wherein the beam body is provided with stirrups, the stirrup parts extend out of the upper surface of the beam body, at least one end part of the beam body is provided with section steel which is suitable for being connected with an external structure, the section steel part is buried in the beam body, the other parts are exposed at the end part of the beam body, and a plurality of support formwork holes are arranged on at least one side wall of the beam body along the longitudinal direction. The section steel is arranged at the end part of the precast beam, thereby being conductive to mounting of the precast beam; the section steel can also serve as a member for combining new concrete with old concrete or a mounting shelving member of a column or a beam; and simultaneously, the support formwork holes are arranged on the beam body, and the support formwork holes can enable the beam to be used as a load-bearing member during the construction stage for bearing the dead weight of the concrete, thereby omitting a landing load-bearing frame.

The invention discloses a hung interlayer structure and a construction method thereof. The hung interlayer structure comprises an upper layer structure component, a hung fitting and an interlayer floor. The upper end of the hung fitting is connected with the upper layer structure component through an upper connecting device. The lower end of the hung fitting is fixedly connected with the interlayer floor in a hung mode through a lower connecting deice. A hole matched with the contour of a frame column, makes the frame column penetrate through the interlayer floor and keeps the frame column and the interlayer floor separated is reserved in the interlayer floor. A gap between the hole and the frame column is filled with a buffer material. The construction method includes the steps of determining the interlayer scheme and the interlayer load, manufacturing the upper connecting device and the hung fitting, reserving the hole in the interlayer floor, connecting the hung fitting with the interlayer floor, filling the gap between the interlayer floor and the frame column with the buffer material and the like. By means of the hung interlayer structure and the construction method, the structure design is simplified, design difficulty is lowered, the disadvantageous anti-seismic factors caused by sudden changes of rigidity and bearing capacity of the upper floor and the lower floor are avoided, cost is reduced, and work efficiency is improved.

The invention discloses a simply supported prefabricated integrally-cast superposed bridge. The prefabricated integrally-cast superposed bridge comprises inverted T-shaped prestressed prefabricated beam parts, cast-in-situ parts and horizontal baffles, and is characterized in that each cast-in-situ part comprises a cast-in-situ plate and a cast-in-situ superposed part at the upper part of the beam part; pretensioned prestressed steel strands are embedded in the upper parts of a web plate and a lower flange of each inverted T-shaped prestressed prefabricated beam part; the horizontal baffles adopt prefabricated plates, and are longitudinally arranged at intervals between the web plates of the adjacent prefabricated beam parts at the two ends of each beam part and positioned above the flanges of the prefabricated beam parts; and the inverted T-shaped prestressed prefabricated beam parts adopt manufacturing moulds commonly used with buildings, and mould plates are good in commonality, convenient to mount and dismount, high in working efficiency and low in amortized cost.

The invention belongs to the field of construction engineering and relates to a prefabricated prestressed concrete stair in prefabricated structure. The prefabricated prestressed concrete stair comprises stair steps, ladder slabs and ribbed beams under the ladder slabs, wherein the ladder slabs comprises inclined ladder segments and platform segments, and the ribbed beams are internally provided with prestressed steel bars. The technical problem that the self-weight of the ladder slabs in a plate-type stair is larger or the ribbed beams in a beam-type stair are higher is solved.

The invention relates to a garage arrangement mode and a structure system thereof which are applied to underground garage construction. The existing underground garage structure system comprises a common frame beam plate structure system, a plate column structure system and a hollow beamless floor structure system, wherein column grid systems of the three structure systems are in rectangular arrangement and column grids align with each other longitudinally and transversely. The column arrangement of the structure system disclosed by the invention is triangular arrangement; columns adopts concrete-filled steel pipe columns; beams adopt H-shaped steel beams; main beams are in triangular arrangement and secondary beams are avoided, so power is transmitted directly; and floors are divided into triangles correspondingly. Compared with the existing structure system, the structure system provided by the invention has the advantages that beam height is effectively reduced; component node standardized and industrialized production is realized; field splice is realized; templates are not needed during construction; cost, land and floor height can be effectively saved and construction period can be shortened.

The invention discloses a high-rise and ultrahigh-rise floor system, which comprises a core cylinder (1) constructed on a foundation and penetrating all floors, a core cylinder peripheral steel structure (4) around the core cylinder (1) and a combined floor (5). The floor system is characterized in that a plurality of cantilever beams (2) are arranged on the floors of the core cylinder (1) at intervals, and the cantilever beams (2) on the same floor form a cantilever floor (3) by pouring reinforced concrete; and the combined floor (5) is arranged between the cantilever floor (3) and the core cylinder peripheral steel structure (4). By using the cantilever floor (3), nodes of the combined floor (5), which are connected with the core cylinder (1), are outwards shifted from the outer edge of the core cylinder (1) to the outer edge of the cantilever floor (3), so that steel consumption in the combined floor (5) and the core cylinder peripheral steel structure (4) can be reduced, the heights of the floors are reduced, and the floor system is convenient to construct.

The invention discloses a suspension cable-arch combined system bridge structure and an assembly construction method thereof. Arch ribs are arranged below a main beam of a suspension bridge, arch columns are arranged on the arch ribs, the upper ends of the arch rib columns are connected with the main beam, the lower ends of the arch rib columns are connected with the arch ribs, and the two ends ofthe arch ribs are fixed to arch rib foundations which are independent foundations; the arch rib foundations are arranged below the main beam; the arch ribs comprise a plurality of prefabricated archrib sections, and the prefabricated arch rib sections are fixedly connected. Arch rib main arches and main cable surfaces are not coplanar, so that the main beam forms a continuous structure in the transverse direction to reduce the height of the main beam; the axial force level of a bridge cable bent tower and a main cable of the suspension cable-arch combined system is lower, so that a lighter structural size can be made, and the construction control difficulty is also reduced; compared with a common arch bridge, the load level of the arch ring and the arch foot of the suspension cable-archcombined system bridge is low, the size of the structure can be reduced, the axial force of the cable bent tower can be reduced, and the horizontal thrust of the main arch ring can be greatly reduced.

The invention discloses a simply-supported-continuous large full-span box girder with medium-lower-speed maglev double lines. The simply-supported-continuous large full-span box girder comprises sidehole girders arranged at two ends of a route and a plurality of middle hole girders arranged between the side hole girders, wherein the side hole girders and the middle hole girders are of a concentric-squares-shaped cross-section structure, and the two sides of the top surfaces of the side hole girders and the middle hole girders extend outwards to form bridge wing plates; each side hole girder comprises a side hole girder concrete girder (1), and side hole girder simply-supported-continuous longitudinal pre-stressed tendons (3) are arranged on the upper edges of the ends, adjacent to the middle hole girders, of the side hole girder concrete girders (1); and each the middle hole girder comprises a middle hole girder concrete girder (6), and middle hole girder simply-supported-continuous longitudinal pre-stressed tendons (8) are arranged on the upper edges of the two ends of the middle hole girder concrete girders (6). The invention further discloses a construction method of the simply-supported-continuous large full-span box girder. According to the simply-supported-continuous large full-span box girder, simply-supported girders of a regular and standard span medium-lower-speed maglev bridge structure is changed to simply-supported-continuous girders, and the break angle rail surface irregularity, formed along with bridge deformation, of girder seam positions of two adjacent spans of simply-supported girders is greatly reduced.

The invention discloses a turnout support system applicable to a straddle type monorail and belongs to related technical fields of straddle monorails. A continuous rigid frame in a longitudinal direction and a plurality of support units which are arranged below the continuous rigid frame at intervals in the longitudinal direction are arranged, the continuous rigid frame is fixedly connected with apier cover beam at the top of the support units, then a rigid system with synergetic stress is formed, and a turnout system can be stably supported effectively on premise that the setup height of a support system is reduced. The turnout support system applicable to the straddle type monorail, which is disclosed by the invention, is simple in structure, simple and convenient to set, small in construction difficulty and high in construction efficiency, a straddle type monorail turnout system can be effectively and stably supported, the height of the cover beam and the overall height of the turnover system are reduced, the construction cost is reduced, great flexibility is provided for design of stations and rails of the straddle type monorail, good application prospects and popularization and application values can be made, and popularization and application of the straddle type monorail can be effectively promoted.