Method for quickly installing section steel beam plate under top-down cover-excavation

Abstract

The invention discloses a method for quickly installing a section steel beam plate under top-down cover-excavation. The method comprises the following steps: preparing for construction; 1) excavating a foundation pit of a top plate to a designed elevation, 2) pouring concrete on a cushion layer, 3) enabling entering of a section steel beam, (4) conducting temporary support installation of the top plate section steel beam; (5) hoisting and positioning the top plate section steel beam; (6) installing and rechecking the top plate section steel beam; (7) binding cover plate reinforcing steel bar and pouring concrete; 8) excavating the foundation pit on a negative one floor, 9) positioning and hoisting a mid-slab section steel beam slab, 10) installing and rechecking the mid-slab section steel beam slab, 11) binding a middle slab reinforcing steel bar and pouring concrete, 12) constructing a side wall section steel column, and 13) completing installation of each middle slab section steel beam in sequence. Beneficial effects are as follows: the method has a compact structure, relieves working intensity of workers, and improves filtrate filtering efficiency and extraction efficiency of medicine components.

Description

Technical field [0001] The present invention relates to the technical field of steel beams, steel sheets, in particular, a rapid mounting method of the type steel beam under a cover retrofold. Background technique [0002] The steel concrete combination structure is an independent structure in which steel is buried in reinforced concrete. Since the addition of type steel has good strength and ductility, it is better than the traditional reinforced concrete structure, and the seismic performance is better. At the same time, domestic and foreign trials have shown that the steel concrete combination structure has good hysteresis and energy consumption under low cycle, and has the characteristics of local stability of good structural and good structures compared to the steel structure. Therefore, in my country's high-level and large underground The development, optimization, and improved structure performance have good use. [0003] However, during the construction of the mounting st...

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Problems solved by technology

[0003] However, during the construction process of installing the steel girders and slabs by excavating the cover of the underground structure, the steel columns and beams below the cover slab cannot be constructed by conventional hoisting machinery and hoisting methods, and the steel beams and columns are constructed in sections, making it difficult to assemble on site At the same time, because the thickness of the steel plate is thick and the welding requirements are high, whether it is a steel beam or a steel column, how to ensure the accuracy of its positioning can smoothly meet the requirements of the specification and how to ensure the safety of the steel column from flat to standing. Difficulties and key points in the installation process of beams and slabs

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