256 Concrete Substructures

25.6.1 Introduction

Bridge substructures transfer traffic loads from the superstructure to the footings and foundations. Vertical intermediate support — piers or bents and end supports — abutments, are included.

25.6.2 Bents and Piers 25.6.2.1 Pile Bents

Pile extension as shown in Figure 25.40a is used for slab and T-beam bridges. It is usually used to cross streams when debris is not a problem.

Section properties

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"h"

Area

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