Guidelines_Bridge_Design.pdf

GUIDELINES FOR BRIDGE DESIGN

INDEX

FROM THE DESK OF SEDC(BR) ....................................................................... 2

FROM THE AUTHORS ........................................................................................ 3

FOREWORD .......................................................................................................... 4

PREFACE ............................................................................................................... 5

FEW WORDS ........................................................................................................ 6

CONTENTS ............................................................................................................ 7

CHAPTER - 1 : INTRODUCTION ......................................................................... 11

CHAPTER - 2 : ESTIMATION OF DESIGN DISCHARGE SCOUR DEPTH,

LINEAR WATERWAY AND AFFLUX .................................................................... 25

CHAPTER - 3 : COMPONENTS OF BRIDGE STRUCTURE ............................. 45

CHAPTER - 4 : SUBMERSIBLE BRIDGES ....................................................... 101

CHAPTER - 5 : INNOVATIVE STRUCTURES AND BRIDGE ASTHETICS ..... 107

CHAPTER - 6 : PREPARATION OF BRIDGE PROJECT ................................. 121

CHAPTER - 7 : PRESTREESING HIGH PERFORMANCE CONCRETE

ANTICORROSIVE TREATMENT ...................................................................... 129

ANNEXURES ...................................................................................................... 137

BRIDGE DESIGN

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The Engineers, who join this organisation, have to study various codes and

books for considerable time to bring themselves up to a desired level of

knowledge, as many of them are not in touch with the requisite literature. They

do not get proper references at the required moment. They do not precisely know

the practices followed in the State P.W.D. as regards the design of bridges and

buildings. It was, therefore, considered necessary to prepare guidelines, which

will help the engineers to know our practices and also know some useful

references for further study.

An effort has been made to discuss almost all aspects relating to the bridge

design, which are necessary for preparing ‘Bridge Project’ and further preparing

the detailed designs. One practical example is also enclosed as annexure to

understand the process better. It may please be remembered that these

guidelines are useful for the beginners in Bridge Design. The provisions are only

guiding principles and hence the designer should also study Text Books, Codes,

and Specifications etc. for preparing the Designs.

The first edition of these guidelines was published in the year 1997. The same

are now being revised as per revisions in IRC codes and prelevant practices in

State P.W.D.

Some new chapters on submersible bridges, innovative structures, bridge

asthetics, and high performance concrete have been added. Also some

additional information on hydraulics including Unit Hydrograph Method.Raft

foundations and some informative sketches have been incorporated. Hence, it is

felt that the second edition of these guidelines will be useful not only to the new

entrants in the Designs Circle but also serves as guidelines to the Field

Engineers of the Department.

AUGUST 2007

Superintending Engineer

Designs Circle(Bridges)

Konkan Bhavan, Navi Mumbai

GUIDELINES FOR

FROM THE DESK OF SEDC(BR)

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The publication of this book could not have been possible but for the untiring

efforts put in by a large member of individuals working in the Design Circle.

The efforts taken by Shri. P. M. Kide, S. E., P. W. C., Chandrapur and Dr. D. T.

Thube SEDC(BR), Navi Mumbai in recasting these guidelines are acknowledged.

The contribution of Pradnya Walke, Executive Engineer (BR1), Designs Circle is

specially acknowledged, who helped in making suitable corrections and additions

in these guidelines in accordance with the latest references and editing the

original text to confirm to the latest codal provisions.

We also thank staff members of Designs Circle namely R. B. Hake (Draftsman),

U. H. Patil, B. D. Kamble, J. S. Shah, N. S. Kore (Tracers), Smt. P. P. Pable,

Smt. J. U. Shenoy (Steno typists) and S. B. Gadave (Sr. Clerk) for their

contributions.

The first edition of these guidelines was issued in 1997.Thereafter modifications

to IRC codes have been issued. There also have been some changes in

practices in designing/constructing bridges. In view of this it was desired to have

modifications in the guidelines. Some new chapters are added, modifications are

done in existing chapters.

This second edition of guidelines is expected to meet the demands of the bridge

designer while planning for a new bridge

AUGUST 2007

Shri. S. B.Tamsekar

Shri. K. S. Jangde

Chief Engineer,

Secretary(Roads), PWD

PW Region,Pune

Govt. of Maharashtra

BRIDGE DESIGN

FROM THE AUTHORS

FOREWORD

✍

Shri. P. D. Wani

Secretary (Works) P.W.D.

Govt.of Maharashtra

Bridges are an integral part of the road network,which serves as the lifeline of

any state. Therefore construction of bridges across nallas, rivers, canals, creeks

and railway lines has always been on priority in Maharashtra State PWD.

Maharashtra like all other states in the country, has a diverse geography and has

constructed all types of bridges after independence, besides maintaining large

number of bridges constructed during preindependence period.

The designs wing of the PWD is active since 1948.This wing is the backbone of

the department in keeping with the pace of development in bridge field.

It was long felt need to prepare a guidebook for the newly appointed Deputy

Engineers joined in the Designs Circle to orient with the design of bridges.This

has been made possible due to the efforts of Shri. K. S. Jangde, Superintending

Engineer and Shri. S. B. Tamsekar, Executive Engineer, BR-1. I am sure that this

book will also be helpful to the engineers of the department in acquiring more

knowledge of bridge engineering.

GUIDELINES FOR

PREFACE

✍

Shri. M. V. Patil

Secretary (Roads) P.W.D.

Govt.of Maharashtra

The variety of forms of bridges demonstrate the combination of art and

technology.Maharashtra as other states of ancient and historical bridges.

With technological advancements, development of new and stronger materials

and construction techniques, the state has advanced from stone masonry arches

and substructure to long span prestressed concrete bridges and tall slender RCC

piers. To keep pace with developments and to be self reliant, a Designs Wong

was opened way back in 1948 and has continually grown.

This book has been conceived as a reference book for new entrants in the Bridge

Designs Wing. After going through the book they can directly start with the job

and thus can speed up the work. This will not only be useful to the new entrants

in the designs wing but will also be reference book for all the engineers in the

department.

Compilation of these guidelines has been possible due to the activeness of

Designs Circle, Navi Mumbai. They deserve appreciation for their commendable

efforts.

BRIDGE DESIGN

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