Construction method of movable gantry in construction of big cantilever bent cap

Abstract

The invention discloses a construction method of a movable gantry in a construction of a big cantilever bent cap. The construction method is characterized in that aiming at the construction of the big cantilever bent cap, a movable gantry system is set, wherein the movable gantry system comprises three units of a left side unit, a middle unit and a right side unit respectively, the left side unit and the right side unit have symmetrical structural forms and are composed of two groups of independently set movable gantries respectively, and the distance between the two groups of the movable gantries is the width of a motor way which maintains normal traffic; movable universal wheels are adopted as trundles of the movable gantries, a helix tube is adopted by the middle unit as a bearing stand column, the top of the helix tube is provided with a sand box, a distributive girder is arranged on the sand box, and a Bailey girder which is used for paving bent cap bottom board is supported on the movable gantry system. The construction method is applied to the construction of the bent cap on an existing road, erection time can be effectively shortened, and vehicle driving on the road is guaranteed.

Description

[0001] This application is the application number 2015109294931, the application date is 20151214, the invention name is the mobile gantry and its construction method in the construction of large cantilever cover beams, and the applicants are China Railway Shanghai Engineering Bureau Group Co., Ltd. and China Railway Shanghai Engineering Bureau Group Third Engineering Co., Ltd. Divisional application of the company's invention patent application. technical field [0002] The invention relates to a mobile gantry used in the construction of a large cantilever cover beam and a construction method thereof, which are used in the construction of a large cantilever cover beam on an existing road where the traffic flow is large, the safety requirement is high, the construction period is tight, and the traffic dredging cannot be changed. Background technique [0003] In the prior art, the construction of large cap beams usually adopts the form of steel pipe columns and Beley frames or...

AI Technical Summary

Problems solved by technology

But both forms have the same problems. One is the safety problem. When the bracket is assembled, due to the restriction that the road cannot be closed, it can only rely on additional personnel to protect the construction site, which has a large safety hazard; The second is the problem of construction progress. The construction period of the steel pipe column and Bailey frame method is about three days, but the installation of the column and Bailey frame is greatly affected by factors such as traffic and weather, and there are many uncontrollable factors, which greatly affect the construction process. Affect the construction progress, and the potential safety hazard is great and even affect the construction quality

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