Construction method for hollow thin-walled high pier non-bracket formwork turnover of railway

Abstract

The invention provides a construction method for hollow thin-walled high pier non-bracket formwork turnover of railways. The method includes the following steps: formwork design and fabrication; first segment solid section construction, pedestrian ladder-way erection, reinforcement bar binding, formwork support and arrangement, and concrete pouring; middle segment section construction, pedestrian ladder-way erection, previous section bottom layer formwork removal, reinforcement bar binding, formwork support and arrangement, and concrete pouring; pier cap construction, bottom formwork support system erection, reinforcement bar binding, formwork support and arrangement, and concrete pouring. The invention has the effects that the method is suitable for the hollow thin-walled high piers of railway bridges; a set-shaped formwork with an operating platform is adopted; the formwork turnover method is adopted for construction; the construction personnel walk up and down through the erected pedestrian ladder-way; and the formwork is simplified in structure and is convenient to process. Moreover, the material and labor for erecting full space supports can be saved; the cost is reduced; the construction period is shortened; and the construction schedule is accelerated.

Description

technical field [0001] The invention belongs to a construction method for mold-turning of hollow thin-walled high piers without support for railway bridges. The method is suitable for hollow thin-walled high piers of railway bridges and has high applicability to the same type of pier columns of other bridges such as highways. Background technique [0002] At present, there are many methods mainly used in the construction of hollow thin-walled high piers in domestic railways: such as full-wall support method, hydraulic overturning method, sliding form method and so on. The full hall support method uses large steel formwork, and the operating platform is erected with full hall supports. This method has many construction procedures and a long construction period, and a large number of steel pipe scaffolds must be used. Due to the long construction period of high piers and the limitation of market conditions, the steel pipe scaffold It is difficult to adjust and transport, and i...

AI Technical Summary

Problems solved by technology

The full hall support method uses large steel formwork, and the operating platform is erected with full hall supports. This method has many construction procedures and a long construction period, and a large number of steel pipe scaffolds must be used. Due to the long construction period of high piers and the limitation of market conditions, the steel pipe scaffold It is difficult to adjust and transport, and it requires a lot of manpower and material resources, and lacks safety guarantees; the hydraulic turning system is composed of a formwork system, an operating platform system, a hydraulic lifting system and ancillary systems. The formwork is fixed on the poured pier and lifted by the hydraulic system. The formwork is raised cyclically until the pier column is poured. This method is expensive to make formwork, complicated to operate, and the safety of the hydraulic platform is poor

The structure of the sliding formwork used in the construction of the sliding form method is complex, the construction process is cumbersome, the lifting of the formwork, the alignment requires high precision, and the appearance control of the pier body is difficult, and the construction cost will be increased

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