Railway high pier body template and scaffold integrated turnover formwork segmental construction method

Abstract

The invention discloses a railway high pier body template and scaffold integrated turnover formwork segmental construction method, which is used for the technical field of bridge construction. The method comprises the following steps: prefabricating pier body templates and a shaping scaffold; erecting a first-layer steel bar bound scaffold; binding first-section pier body steel bars; after setting a guy cable, detaching the first-layer steel bar bound scaffold; hoisting the pier body templates, wherein at least three sections of the pier body templates are arranged from bottom to top; after detaching the guy cable, pouring first-section pier body concrete; after reaching required strength, detaching the pier body templates except the pier body template of the topmost section; hoisting on the pier body template of the topmost section to form a steel bar bound scaffold and binding the pier body steel bars; after setting the guy cable, detaching the steel bar bound scaffold; mounting the first detached pier body templates on the pier body template of the topmost section to form a turnover formwork; detaching the steel bar guy cable, pouring secondary-section pier body concrete; continually carrying out turnover formwork construction on the residual sections of a pier body and finishing pier body construction. The railway high pier body template and scaffold integrated turnover formwork segmental construction method has remarkable characteristics and advantages of convenience for mounting and dismounting, simplicity in operation, safety and reliability and short construction period.

Description

technical field [0001] The invention is used in the technical field of bridge construction, and in particular relates to a segmental construction method for integrated overturning formwork and scaffolding of railway high piers. Background technique [0002] In recent years, large-scale traffic road networks are being built across my country, and bridges, as a common structural form across rivers, lakes, and seas, are often used in every traffic road network, and there are more and more types of bridge piers. [0003] Conventional pier body construction method: high pier body can be constructed in sections according to the height or poured as a whole. (1) During section pouring construction, the scaffolding, top construction platform, protective railings and cable wind should be installed in stages, the formwork for the pier body should be installed in stages, and the concrete for the pier body should be poured in stages, during which the previous construction platform and pr...

AI Technical Summary

Problems solved by technology

[0007] Disadvantages of one-time pouring of the pier body: 1. The external scaffolding needs to be erected once, and the process is cumbersome, with a lot of personnel input, high construction costs, and high safety risks; 2. The internal scaffolding of each section of the pier body needs to be erected and dismantled once, and the process is cumbersome. The construction personnel invest a lot, and the safety risk is high; 3. The formwork needs to be designed to the height of the entire pier body, which is costly, and the personnel investment is large, and the installation safety risk is high

[0008] Disadvantages of multiple pouring of pier body sections: 1. The external scaffolding needs to be erected and raised in stages, the process is cumbersome, the construction period is long, the construction cost is high, and the safety factor is low; The dismantling process is cumbersome, the construction period is long, and the safety factor is low; 3. The formwork also needs to be designed to the height of the entire pier body, which is costly, and the construction period is long, and the installation safety risk is high

[0010] 1. Disadvantages of erecting scaffolding with fastener steel pipe scaffolding: On-site statistical results show that the general construction period of a pier column with a height of about 30m reaches about 30 days. Difficulty and safety management risks will increase accordingly, and construction investment costs will also increase accordingly;

[0011] 2. Fastener steel pipe scaffolding scaffolding disadvantages: The multifunctional scaffolding series originated in Western countries in the early 1960s and has achieved remarkable results in some high-rise building construction applications. However, in the 1990s, this scaffolding did not get the expected development. During construction On the contrary, there are fewer and fewer applications. The reason is that on the one hand, the construction technology of the erection tool itself and the safety management of the process are difficult to be in a state of precise and effective control, resulting in a high incidence of accidents; on the other hand, the installation and dismantling of the frame Large quantity and high construction risk, long construction period and high construction cost; then there is the issue of applicability, there are essential differences in the use of different terrains and geological conditions in plain areas and mountainous and hilly areas, and there are high technical requirements for foundation treatment

[0012] The above two kinds of scaffolding have their own disadvantages, and under the conditions of the two kinds of scaffolding, the formwork investment is large in the case of integral and staged pouring, and the risk of scaffolding and formwork installation is high.

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