Construction method for replacing disc type support with rail transit plate type support

Abstract

The invention discloses a construction method for replacing a disc type support with a rail transit plate type support. The construction method sequentially comprises a preparation stage, a first jacking stage, a padstone replacement stage and a second jacking stage. The preparation stage and the padstone replacement stage complete construction in a non-skylight point, and the first jacking stageand the second jacking stage complete construction in a skylight point; the first jacking stage and the second jacking stage each comprise the steps of upper constraint force relieving, overall jacking, upper constraint force recovering, data collecting after jacking and jacking system disassembling and maintaining; and in the first jacking stage, a plate type support is taken out during overall jacking, and in the second jacking stage, a disc type support is installed during overall jacking. According to the construction method, the support is replaced in the mode of ''not interrupting traffic, longitudinally dividing piers and transversely and synchronously jacking beam bodies'', train skylight points and non-skylight points are fully utilized for construction, and an influence on existing rail line operation is small.

Description

technical field [0001] The invention relates to the technical field of rail transit construction, in particular to a construction method for replacing a disc-type support with a plate-type support for rail transit. Background technique [0002] In recent years, my country's urban rail transit industry has developed rapidly, and the number of urban rail transit operating lines has continued to increase. Existing rail transit can be built underground, on the ground or on a viaduct; if it is built on a viaduct, the upper structure of the viaduct must be connected to the lower structure with supports to ensure that various loads of the upper structure are transferred to the piers and abutments, and It can adapt to the displacement (displacement and rotation angle) caused by factors such as live load, temperature change, and concrete shrinkage, so that the actual stress of the upper and lower structures conforms to the design calculation model. [0003] However, under a period o...

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Problems solved by technology

However, this construction method needs to complete the whole process of synchronous jacking, pad stone replacement, and support replacement in a complete cycle; however, rail transit needs to be carried out within the skylight point (do not exclude auxiliary work during the daytime construction), and a single skylight Due to the short time, it is impossible to complete the whole process of synchronous jacking, pad stone replacement, support replacement, etc. The traffic may be interrupted, which will inevitably affect the normal operation of the line during the construction process.

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