Pile type continuous rigid frame bridge and construction method thereof

Abstract

The invention discloses a continuous rigid frame bridge suitable for a high-waterline impoundment reservoir area. The pile type continuous rigid frame bridge can meet the requirements for strength and flexibility without a common pier. The pile type continuous rigid frame bridge comprises a girder, two girder connecting parts and a pile group foundation, wherein the two girder connecting parts stride the girder, the pile group foundation is composed of a set of filling piles, and the filling piles are in rigid connection with the girder connecting parts. The filling piles comprise upper columns and lower columns, wherein the upper columns are connected with the girder connecting parts, and the lower columns are poured into a bed rock. Longitudinal steel bars are arranged on the upper columns after the following carrying capacity limiting condition calculation and the normal using limiting condition calculation are carried out. Longitudinal steel bars are arranged on the lower columns according to the file foundation requirement. Pile transition sections are arranged between the lower columns and the upper columns, and the longitudinal steel bars in the pile transition sections are the same as longitudinal reinforcing bars of the upper columns. The invention further provides a construction method for the pile type continuous rigid frame bridge. The pile type continuous rigid frame bridge has the advantages that the anti-seismic requirement is met, construction is convenient, construction cost is saved, and the construction period is shortened.

Description

technical field [0001] The invention relates to a continuous rigid-frame bridge, in particular to a continuous rigid-frame bridge suitable for reservoir areas with high water levels and a construction method thereof. Background technique [0002] The continuous rigid frame bridge is evolved from the T-shaped rigid frame bridge. Its structural characteristics are the continuous beam body and the consolidation of the girder pier. It not only maintains the advantages of the continuous beam without expansion joints and smooth driving, but also maintains the T-shaped rigid frame bridge It has the advantages of no support and no need for temporary consolidation during construction, and it has great bending stiffness along the bridge and transverse torsional stiffness. Therefore, the continuous rigid frame bridge has large spanning capacity, reasonable force, good structural overall performance, strong earthquake resistance, large torsional potential, simple shape, and convenient m...

AI Technical Summary

Problems solved by technology

However, when the bridge is built after water storage in the mountainous reservoir area, due to the large water depth, high water level, and small height difference between water and land, the height of the bridge pier is limited under a reasonable main girder elevation, and there is even no space for setting up the pier. figure 2 As shown, due to the high water level and the limitation of the main girder and the cap, it is difficult for the continuous rigid frame bridge to use the height of the pier to increase the flexibility of the pier. Temporary structures such as steel cofferdams, steel hanging boxes, etc. require large deep-water construction equipment that is difficult to enter the construction site

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