Method for constructing large-span continuous steel trussed girder bridge under low height limit condition
A technology of steel truss girder bridge and construction method, which is applied to bridges, bridge materials, bridge construction, etc., can solve the problems of continuous steel truss girder bridges that cannot be constructed and steel truss girder girders cannot be lifted by hoisting equipment, etc., and achieves high strength and rigidity. , to ensure the effect of safety and high safety
Active Publication Date: 2015-03-25
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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Benefits of technology
This new technology described in this patents allows for reducing the overall length or weight of an existing tower-type building without compromising its stability during construction. It achieves this by dividing up the entire column into smaller segments called "posts," allowing it to be supported above ground level instead of being suspended from the roof overhanging them. By doing these division steps before placing the columns onto the foundation, there'll be fewer components needed compared to traditional methods like casting bridges. Additionally, the current method requires multiple stages of curving and assembling the legs together, making the construction process more complicated than previous techniques. Overall, this innovative solution improves efficiency and reduces costs associated with constructing tall buildings.
Problems solved by technology
This patented technical problem addressed during this patents relates to controlling the placement of large loads due to limited space availability between high altitude platforms like those found throughout major highway networks while maintaining safe flight paths through tunnels under severe weather conditions.
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[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0037] The construction method of the large-span continuous steel truss bridge under the condition of low limit height in the embodiment of the present invention comprises the following steps:
[0038] S1: see figure 1 As shown, at the design positions of all the piers of the long-span continuous steel truss girder bridge, the poured pier body 2 forming the lower half of the pier is poured, and the steel truss girder 1 is erected on the top of the poured pier body 2 until it is closed, and then transferred to Step S2.
[0039] S2: see figure 2 As shown, the assembled steel truss girder 1 is lifted to the design elevation on the top of the poured pier body 2; while the steel truss girder 1 is lifted, the poured pier body 2 is alternately poured in sections and regions. The pier body 3 supports the steel truss girder 1 through the poured pier b
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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.
Description
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