544.7R-16 Report on Design and Construction of Fiber-Reinforced Precast Concrete Tunnel Segments

544.7R-16 Report on Design and Construction of Fiber-Reinforced Precast Concrete Tunnel Segments

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Description

Fiber reinforcement has emerged as an alternative to traditional reinforcing bars and welded wire mesh reinforcement for precast concrete tunnel segments. Due to significantly improved post-cracking behavior and crack control characteristics, fiber-reinforced concrete (FRC) segments offer advantages over traditionally reinforced concrete segments such as saving cost and reducing production time while developing a more robust product with improved handling and long-term durability. Specific guidance on the design of fiber-reinforced precast concrete tunnel segments is needed for this emerging technology. This document offers general information on the history of FRC precast segments from tunneling projects throughout the world; a procedure for structural analysis and design based on governing load cases; and a description of the material parameters, tests, and analyses required to complete the design. The proposed guidelines are based on the knowledge gained from experimental research, analytical work, and the experience gained on numerous FRC precast tunnel projects.

Keywords: crack widths; earth pressure; fibers; fiber-reinforced concrete; grout pressure; hydrostatic pressure; lining; precast segment; stripping; surcharge load; thrust jack forces; tunnel.

Document Details

Author: ACI Committee 544

Publication Year: 2016

Pages: 36.00

ISBN: 9780870319488

Categories: Fiber-Reinforced Concrete

Formats: Printed Document, PDF, ePub, or Kindle

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE

1.1—Introduction

1.2—Scope and limitations

1.3—Applications and uses in existing tunnels

CHAPTER 2—NOTATION AND DEFINITIONS

2.1—Notation

2.2—Definitions

CHAPTER 3—DESIGN PHILOSOPHY

3.1—Fiber-reinforced concrete design codes, standards, and recommendations

3.2—Governing load cases and load factors

3.3—Design approach

CHAPTER 4—DESIGN FOR PRODUCTION AND TRANSIENT STAGES

4.1—Load Case 1: Segment stripping

4.2—Load Case 2: Segment storage

4.3—Load Case 3: Segment transportation

4.4—Load Case 4: Segment handling

CHAPTER 5—DESIGN FOR CONSTRUCTION STAGES

5.1—Load Case 5: Tunnel-boring machine thrust jack forces

5.2—Load Case 6: Tail skin back-grouting pressure

5.3—Load Case 7: Localized back grouting (secondary grouting) pressure

CHAPTER 6—DESIGN FOR SERVICE STAGES

6.1—Load Case 8: Earth pressure, groundwater, and surcharge loads

6.2—Load Case 9: Longitudinal joint bursting load

6.3—Load Case 10: Loads induced due to additional distortion

6.4—Load Case 11: Other loads

CHAPTER 7—MATERIAL PARAMETERS FOR DESIGN

CHAPTER 8—TESTS AND PERFORMANCE EVALUATION

8.1—Material parameters, tests, and analyses

8.2—Full-scale tests

CHAPTER 9—HYBRID REINFORCEMENT FOR TUNNEL LININGS

CHAPTER 10—DESIGN EXAMPLES

10.1—Monte Lirio tunnel in Panama

Design summary

10.2—Barcelona Metro Line 9

CHAPTER 11—REFERENCES

Authored documents

APPENDIX A—CALCULATION OF AXIAL FORCE-BENDING MOMENT

INTERACTION DIAGRAM

ERRATA INFO

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