4 results about "Girder bridge" patented technology

The invention discloses a fully-assembled prefabricated concrete girder bridge superstructure and further provides a construction method of the fully-assembled prefabricated concrete girder bridge superstructure. The fully-assembled prefabricated concrete girder bridge superstructure comprises prefabricated concrete box girder single bodies, prefabricated concrete guardrails and a bridge deck paving layer. The prefabricated concrete box girder single bodies comprise prefabricated concrete box girder bodies; flange plates are arranged on the two sides of top plates of the prefabricated concretebox girder bodies; transverse splicing rigid prefabricated pieces are pre-embedded in the flange plates; the prefabricated concrete box girder single bodies further comprise transverse partition plates, and transverse partition plate splicing rigid prefabricated pieces are pre-embedded in the transverse partition plates; longitudinal splicing rigid prefabricated pieces are pre-embedded in the twoends of the prefabricated concrete box girder bodies; the adjacent prefabricated concrete box girder single bodies are transversely and longitudinally spliced; and the prefabricated concrete guardrails are connected with the prefabricated concrete box girder single bodies, and guardrail locking nuts are assembled on guardrail connecting bolts. Through the structure, cast-in-place concrete and negative moment prestressed ribs of the prefabricated concrete girder bridge superstructure in the connecting construction process can be omitted, and all components of the superstructure are fully assembled.

The invention discloses a method for constructing a large-span continuous steel trussed girder bridge under a low height limit condition, and relates to the field of constructing the large-span continuous steel trussed girder bridge. The method comprises the following steps: at designed positions of all piers of the large-span continuous steel trussed girder bridge, pouring poured pier bodies for forming the lower half parts of the piers, and mounting steel trussed girders at the tops of the poured pier bodies till closing; jacking assembled steel trussed girders to designed elevations at the tops of the poured pier bodies; in the steel trussed girder jacking procedure, alternatively pouring to-be-poured pier bodies at the tops of the poured pier bodies in sections and areas, so that the poured to-be-poured pier bodies support the steel trussed girders; jacking the steel trussed girders with the designed elevations to the tops of the poured to-be-poured pier bodies. According to the method for constructing the large-span continuous steel trussed girder bridge under the low height limit condition, the construction space for steel trussed girder top surfaces is expanded by an on-situ steel girder assembly elevation reduction manner, the construction is performed and the safety is ensured under the low height limit condition, the construction procedure is simple, the construction cost is low, and the construction period is short.