Post tensioned pre-stressed hollow type pier column structure and construction method

Abstract

The invention relates to the technical field of bridge design and construction, in particular to a post tensioned pre-stressed hollow type pier column structure and a construction method. The post tensioned pre-stressed hollow type pier column structure comprises a bearing platform, a pier column, a pre-stressed reinforcement steel, pipe grouting material, a concrete wet joint, viscose, an anchorplate and an anchorage. The pier column includes a bottom end section, standard sections and a top cover, the bottom end section is fixed on the top of the bearing platform, the standard sections arefixed on the top of the bottom end section, the top cover is fixed on the top of the standard sections, the standard segment includes a plurality of standard which are superposed correspondingly, septum plates are arranged between the two adjacent standard sections, pre-stressed steel holes which are in communication with the bearing platform, the standard sections, the septum plates, and the topcover correspondingly are formed in the bearing platform, the standard sections, the septum plates, and the top cover, the pre-stressed steel holes are penetrated by the pre-stressed reinforcement steel, the inner wall of a bearing platform preformed groove and the inner wall of the bottom end section are correspondingly provided with exposed steel which are arranged corresponding to the concretewet joint, the anchor plate is arranged on the end portion of the pre-stressed reinforcement steel holes on the bearing platform and the top cover, and the anchorage is correspondingly arranged with the anchor plate, so that the pre-stressing and stretching can be completed in a short time.

Description

technical field [0001] The invention relates to the technical field of bridge design and construction, in particular to a post-tensioned prestressed prefabricated hollow pier column structure and a construction method. Background technique [0002] Bridges across rivers, lakes and seas are composed of piers and bridges. The pier columns of bridge piers are generally divided into hollow columns and solid columns. Currently, all columns with reinforced concrete structures are cast-in-place non-prestressed structures. The pier column above can only be constructed after the cap platform construction is completed and has a certain strength. Not only the construction period is long, but also the material amortization is large, the high-altitude operation time is long, and the risk is great. It will have a greater impact on the Sereng region in northern my country, and may The construction period will be delayed by one year. The bending resistance of the non-prestressed structure is ...

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Problems solved by technology

[0002] Bridges across rivers, lakes and seas are composed of piers and bridges. The pier columns of bridge piers are generally divided into hollow columns and solid columns. Currently, all columns with reinforced concrete structures are cast-in-place non-prestressed structures. The pier column above can only be constructed after the cap platform construction is completed and has a certain strength. Not only the construction period is long, but also the material amortization is large, the high-altitude operation time is long, and the risk is great. It will have a greater impact on the Sereng region in northern my country, and may The construction period will be delayed by one year. The bending resistance of the non-prestressed structure is significantly smaller than that of the prestressed structure, and a large number of steel bars need to be configured to meet the requirements of bending resistance. Compared with the prestressed structure, the amount of concrete will be greatly increased. Compared with the current environmental protection , Energy saving requirements do not meet

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