Double-limb pier bent cap

Abstract

The invention relates to a double-limb pier bent cap which comprises a bent cap body. Two longitudinally separated stand columns are arranged at the bottom of the bent cap and arranged on a bearing platform, and a foundation is arranged below the bearing platform. The bent cap can be of a common reinforced concrete structure or a prestressed concrete structure. The stand columns have reinforced concrete solid structures, the side length of the cross section of each stand column in the transverse direction of the bridge is larger than that of the cross section in the longitudinal direction of the bridge, the stand columns are divided into two independent stand columns in the longitudinal direction of the bridge to form double-limb piers, and the centers of the two stand columns correspond to the upper structure supports in position. The double-limb piers and a group of pile foundations composed of cast-in-situ bored piles are in structural transition through the bearing platform, and the two ends of the double-limb piers should be fixedly connected with the bent cap and the bearing platform respectively. The anti-bending rigidity of the structure in the bridge direction can be greatly reduced, the structural anti-seismic property objective is achieved, the construction cost is saved, the under-bridge driving view is enlarged, and the structure is safe, reliable, economical and attractive.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a double-leg pier cap beam. Background technique [0002] With the rapid development of urban traffic construction, it is inevitable in the design of urban viaducts to use the central divider of the ground road system to arrange piers. The two columns of the bridge are supported under the cover beam, the top of the column is consolidated with the cover beam, and the transition between the column and the pile foundation is through the cap. When the layout space of the pier is further restricted, the lateral distance between the two columns gradually decreases and evolves into Cap-beam form for single-column piers. [0003] In the case of traditional single-column pier cap beams, in order to provide greater lateral rigidity and strength for the structure when the vertical dimension of the column is limited, the cross-sectional dimension along the bridge dire...

AI Technical Summary

Problems solved by technology

[0003] In the case of traditional single-column pier cap beams, in order to provide greater lateral rigidity and strength for the structure when the vertical dimension of the column is limited, the cross-sectional dimension along the bridge direction is often larger, and increasing the cross-sectional dimension also improves The bending stiffness along the bridge direction of the structure further increases the internal force of the structure, and it is often necessary to find a balance between the two, which is difficult to design, especially when the column height is small, which is not conducive to the bridge's resistance to the bridge along the bridge. Directional temperature force, vehicle braking force and strong earthquake force

When the span of the bridge is small, such thick piers reduce the permeability of the driving vision under the bridge, and the overall landscape effect of the bridge is poor

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