ACI 533.5R 2020

$46.04

ACI 533.5R-20: Guide for Precast Concrete Tunnel Segments

Published By	Publication Date	Number of Pages
ACI	2020	84

Guaranteed Safe Checkout

Category: ACI

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

The worldwide trend in construction is toward mechanization and automation. This trend has led to continued rapid progress of mechanized tunneling. Advantages over conventional tunnel construction methods include, but are not limited to, occupational health and safety, faster advance rates, and reducing construction labor requirements. Mechanized tunneling in soft ground using tunnel boring machines is often associated with installing precast concrete segmental lining. However, very little industry-wide guidance has been provided by practice and code organizations. This document provides guidelines for precast concrete tunnel segments, including the most recent developments and practical experience, in addition to information on all aspects of design and construction. These guidelines are based on the knowledge and the experience gained on numerous precast tunnel projects in the United States, and available national and international guidelines often used as industry references. Keywords: design; durability; fiber; gasket; joint; lining; precast; segment; tolerance; tunnel.

PDF Catalog

PDF Pages	PDF Title
3	533.5R-20.pdf TITLE PAGE
4	CHAPTER 1—INTRODUCTION AND SCOPE 1.1—Introduction 1.2—Scope
5	CHAPTER 2—NOTATION AND DEFINITIONS 2.1—Notation
7	2.2—Definitions
8	CHAPTER 3—DESIGN PHILOSOPHY AND SEGMENTAL RING GEOMETRY 3.1—Load and resistance factor design 3.2—Governing load cases and load factors 3.3—Design approach
9	3.4—Segmental ring geometry and systems
14	CHAPTER 4—DESIGN FOR PRODUCTION AND TRANSIENT STAGES
16	CHAPTER 5—DESIGN FOR CONSTRUCTION STAGES
17	5.1—Tunnel boring machine thrust jack forces
21	5.2—Tail skin back grouting pressure
22	5.3—Localized back grouting (secondary grouting) pressure 5.4—TBM backup load
23	CHAPTER 6—DESIGN FOR FINAL SERVICE STAGEs
24	6.1—Earth pressure, groundwater, and surcharge loads
29	6.2—Longitudinal joint bursting load
30	6.3—Loads induced due to additional distortion
31	6.4—Other loads
34	CHAPTER 7—DETAILED DESIGN CONSIDERATIONS 7.1—Concrete strength and reinforcement
36	7.2—Concrete cover 7.3—Curing 7.4—Reinforcement spacing
37	7.5—Fiber reinforcement
39	CHAPTER 8—TESTS AND PERFORMANCE EVALUATION
40	CHAPTER 9—DESIGN FOR SERVICEABILITY LIMIT STATE 9.1—Verification for SLS in tunnel segments 9.2—Stress verification 9.3—Deformation verification
41	9.4—Cracking verification
42	CHAPTER 10—DESIGN OF SEGMENT GASKET 10.1—Gasket materials
43	10.2—Water pressure and gasket design
44	10.3—Gasket relaxation and factor of safety 10.4—Tolerances and design for required gap/offset
46	10.5—Gasket load-deflection 10.6—Gasket groove design
47	10.7—New development in gasket systems
49	CHAPTER 11—CONNECTION DEVICES AND FASTENING SYSTEMS 11.1—Bolts, dowels, and guiding rods 11.2—Design of connection device for gasket pressure
50	11.3—Latest developments in joint connection systems 11.4—Fastening systems to segments
53	CHAPTER 12—TOLERANCES, MEASUREMENT, AND DIMENSIONAL CONTROL 12.1—Production tolerances
54	12.2—Measurement and dimensional control
58	12.3—Test ring and dimensional control frequency
61	12.4—Construction tolerances
62	CHAPTER 13—REPAIR OF DEFECTS CHAPTER 14—DURABILITY 14.1—Conventional degradation mechanisms in tunnel linings
68	14.2—Stray current corrosion in segmental tunnel linings
69	14.3—Mitigation methods for stray current corrosion
72	14.4—Durability under coupling multi-degradation factors
75	14.5—Prescriptive-based approaches
78	CHAPTER 15—REFERENCES
79	Authored documents