Internal steel tube confined reinforced concrete hollow pier

A technology of reinforced concrete and inner steel pipes, which is applied in the field of bridge pier structures, can solve problems such as changes in the mechanical properties of concrete outside, difficulty in erecting and dismantling internal formwork, and internal support of difficult external concrete, so as to eliminate erection and demolition procedures and avoid adverse effects , the effect of improving bearing capacity and ductility
CN102433833AInactive Publication Date: 2012-05-02NANJING FORESTRY UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING FORESTRY UNIV
Publication Date
2012-05-02
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides an internal steel tube confined reinforced concrete hollow pier. The pier is jointly formed by longitudinal bars (1), stirrups (2), internal steel tubes (4), diaphragms (5) and concrete (3) poured outside the internal steel tubes (4), wherein the longitudinal bars (1) and the stirrups (2) form a reinforcement cage; the concrete (3) wraps the reinforcement cage; concrete covers are arranged outside the stirrups (2); the horizontal diaphragms (5) are arranged inside the internal steel tubes (4) and are vertically arranged at intervals along the pier; the arrangement distances of the horizontal diaphragms are not greater than the minimum size of the pier section appearance; and the internal steel tubes (4) are hollow inside and confine the concrete between the internal steel tubes and the stirrups with the stirrups (2) inside and outside. The pier has the following beneficial effects that: the structure saves materials; and stressed in three directions, the side wall concrete is not easy to damage, has high bearing capacity, good ductility and good durability and is especially suitable for large load and large section high pier and bridge tower components.
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Description

technical field

[0001] The invention relates to a bridge pier structure, in particular to a reinforced concrete hollow bridge pier constrained by inner steel pipes. Background technique

[0002] Reinforced concrete hollow pier refers to a reinforced concrete pier with a hollow interior, which is an optimized form of pier cross-section for light and economical substructure. It has the characteristics of small cross-sectional area, large cross-sectional resistance moment, light weight, good structural rigidity and bearing capacity. It is widely used in the field of roads and railways, and is mostly used for high bridge piers. Compared with the gravity-type solid bridge piers, the hollow bridge piers can generally reduce the amount of concrete by 40% to 60%.

[0003] In the construction of highways and railways in mountainous areas of our country, due to the large changes in terrain, high bridge piers account for a large proportion. High bridges with a pier height of more than...

Claims

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