Large-span main beam bidirectional rapid incremental launching equipment system and construction method

Abstract

The invention belongs to the technical field of main beam incremental launching construction in bridge construction, and particularly relates to a large-span main beam bidirectional rapid incremental launching equipment system and a construction method. The system comprises a supporting system, a power system and an accurate positioning system. The supporting system comprises stand columns, an unloading device, cross beams, longitudinal beams and distribution beams, each stand column is arranged on a pier or on a foundation between two piers, one cross beam is connected between the tops of each row of stand columns, the longitudinal beams are installed on the cross beams, the distribution beams are installed on the longitudinal beams, and a main beam is placed on the distribution beams. The power system comprises a pushing counter-force base, a jack, a deviation rectifying device, a flexible pushing device, an anchor pulling structure and a traction bundle. The accurate positioning system comprises a stand column, a stay cable and beam anchor beams, the stand column is fixed to the middle of the main beam, the beam anchor beams are installed at the two ends of the main beam respectively, and the stay cable is connected between the beam anchor beams and the top of the stand column. Construction of guide beams and the combination section of the guide beam and the main beam is omitted, and the construction quality of the main beam is ensured.

Description

technical field [0001] The invention belongs to the technical field of main beam jacking construction in bridge construction, in particular to a large-span main beam two-way fast jacking equipment system and a construction method. Background technique [0002] With the rapid development of high-speed railways, it is necessary to design passenger stations in urban areas, and it is inevitable to cross the existing high-speed railways, passenger dedicated railways, intercity railways and their related contact lines and moving train lines. At this time, the intersection design The scheme generally adopts the scheme of swivel construction and jacking, among which the jacking construction method has many advantages such as relatively light preparation, strong applicability to a relatively special construction site environment, easy factory construction, and easy quality management. It is widely used in the field of structure construction. Under normal circumstances, when the main...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the long-span main girder adopts the conventional jacking scheme and cannot complete the positioning process within the given skylight point of the existing operation line crossing at a small angle, the cantilever length is too long, the jacking speed is slow, the vertical deformation is large, Accurate control is difficult and other problems, to provide a large-span main girder two-way rapid jacking equipment system and construction method

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