unit i bcee ppt

BASIC CIVIL ENGINEERING AND

ENVIRONMENTAL ENGINEERING

SKN SINHGAD INSTITUTE OF TECHNOLOGY & SCIENCES, LONAVALA

First year of Engineering ( Common to all branches)

Presented by

Prashant AdsulAssistant Professor

Course Objective

• Introduction to Civil and Environmental Engineering

• Help understanding Role of civil engineer, materials and construction, Maps and

surveying Ecology, Energy and environmental pollution environmental problems like global warming etc.

• Broadening knowledge• Shaping attitude

Teaching Scheme

• Theory: 3 Hours/Week Six units

• Practicals: 2 Hours/Week 8 Practical Exercises

Weightage for the Syllabus

Units Teaching hours Weightage

UNIT I Introduction to Civil EngineeringUNIT II Materials and Construction 6 +6 25 %

UNIT III Uses of maps and field surveysUNIT IV Ecology and Eco System 6+6 25 %

UNIT V Planning for the Built Environment 6 25 %

UNIT VI Energy and Environmental Pollution 6 25 %

As per UNIVERSITY OF PUNE w.e.f. from JUNE 2012

RULES AND REGULATIONS OF EXAMINATIONS

Theory Examination (100 Marks)Phase Exam Type Units Marks Duration

Phase I Online Objective I & II 25 30 min.

Phase II Online Objective III & IV 25 30 min.

Phase III Written All Six units 50 120 min.

As per UNIVERSITY OF PUNE w.e.f. from JUNE 2012

RULES OF PASSING

• Term work: Minimum 40% marks

• Theory examination: Minimum 40% marks all together

Books

TEXT BOOKS:1. Surveying and Levelling --- Kanetkar and Kulkarni, PVG Prakashana2. Environmental Studies D.L.Manjunath – Pearson Education.3.Building Construction --- Bindra Arora; Dhanpat Rai publication.4. Text book of Environmental Studies-Erach Bharucha-UGC, Universities Press.

REFERENCE BOOKS:1. Building Design and Drawing-Shah, Kale and Patki. TATA McGraw Hill.2. Introduction to Surveying-Anderson-McGraw-Hill International Student Edition.3. A Basic Course in Environmental Studies - S. Deswal and A. Deswal, Dhanpat RaiPublications, Delhi.

Unit 1: Introduction to Civil Engineering

a) Role of Civil Engineer in the construction of buildings, dams, expressways and infrastructure projects for 21st century. Importance of an interdisciplinary approach in engineering.

b) Basic Areas in Civil Engineering Surveying, Construction Engineering, Project Management, Transportation Engineering, Fluid Mechanics, Irrigation Engineering, Structural Engineering, Geotechnical and Foundation Engineering, Environmental Engineering, Quantity Surveying, Earthquake Engineering, Infrastructure Development, Town Planning, Remote Sensing.

Unit 1: Introduction to Civil Engineering

Branch of Engineering includes

• Planning• Designing• Construction• Maintenance of structures

Role of Civil Engineer

• Buildings • Dams • Expressways• Infrastructure projects

Various Disciplines in Civil Engg. SurveyingConstruction engineeringStructural engineeringEarthquake engineeringGeotechnical and foundation engineeringQuantity surveyingFluid mechanics

Irrigation engineeringTransportation engineering Environmental engineering

Town planning Infrastructural development

Project management Remote sensing

Interdisciplinary approach in Engineering

1. Architects and town planners.2. Electrical engineers.3. Electronic engineers.4.Mechanical and automobile engineers.5. Doctors and health care officers.6. Educationalists.7. Municipal officers.8. Taluka and district administrators.

Why Civil Engineering? Do you enjoy solving problems and putting your ideas into action?

Are you curious about how things work and how to make them better?

Are you interested in improving the environment?

Are you socially aware and interested in helping people live better?

Civil Engineering In modern usage, civil engineering is a broad field ofengineering that deals with the planning, construction,and maintenance of fixed structures, or public works,as they are related to earth, water, or civilization andtheir processes.

Most civil engineering today deals with power plants,bridges, roads, railways, structures, water supply,irrigation, environment, sewer, flood control andtraffic.

Transportation Engineering

Because the quality of a community is directly related to the quality of its transportation system, your function as a transportation engineer will be to move people, goods, and materials safely and efficiently.

You will design, construct, and maintain all types of facilities, including highways, railroads, airfields and ports.

Transportation EngineeringHighway Engg. 1.Nationalhighways(NH)Width7m-15m2.State highways(SH) Width 7m-10m3.District highways Width 5m – 8m4. Village roads

Classification based on materials:A. Earthen roadsB. Water bound mecadam road (W.B.M.)C. Bituminous/ tar roads D. Cement concrete roads

•Railway Engg.•Bridge Engg.•Tunnel Engg.•Harbour, Dock Engg.

Bituminous/ tar roads

Cement concrete roads

Railway

Railway

Environmental Engineering• Environmental Engineering deals with pollution control and public health

engineering.

• Different types of pollutions are water, air, noise and other pollution.

• Due to large scale industrialization, population growth, rapid urbanization and several other human activities like construction, mining, transportation, environment gets polluted.

• Environmental engineering deals with technologies & facilities which are engaged in reducing pollution.

• Environmental engineering includes design, construction and maintenance of water treatment plant, waste water treatment plant, water distribution network and sewerage system, it also deals with solid waste management in towns and cities.

• Public health engineering includes water treatment, water distribution network, & solid waste management.

Environmental Engineering

Environmental engineers translate physical, chemical, and biological processes into systems to remove pollutants from water, reduce non-hazardous solid waste volumes, eliminate contaminants from the air, and develop groundwater supplies.

In this field, you might be called upon to resolve problems of providing safe drinking water, cleaning up sites contaminated with hazardous materials, cleaning up and preventing air pollution, treating wastewater, and managing solid wastes.

ENVIRONMENTAL ENGINEERING

•Water Supply Engineering: –Quantity& quality of water –Collection & conveyance –Water treatment processes & design –Distribution system

•Sanitary Engineering: –Quantity –Design / treatment –Disposal

•Environmental Pollution: –Air, noise. ( Sources, causes, effects….etc.)

Geotechnical Engineering

Almost all of the facilities that make up our infrastructure are in, on, or with earth materials, and geotechnical engineering is the discipline that deals with applications of technology to solve these problems.

Examples of facilities in the earth are tunnels, deep foundations, and pipelines. Highway pavements and many buildings are supported on the earth.

Geotechnical Engineering• Geotechnical engineering is that field of civil engineering which deals with

soil investigation and design of proper foundations of structures.

• Soil investigation includes collection and testing of soil samples.

• Geotechnical engineering includes measurement of soil parameters and safe bearing capacity.

• It also includes construction and design of simple foundations, pile foundations, well foundations, caissons, coffer dams, construction of foundation of dams, construction of tunnels, sub base of road, earthen dams, earth related constructions.

• Sound knowledge of geology and geotechnical engineering is necessary for construction of earth related structures.

GEOTECHNICAL ENGINEERING helpful in following problems:

•Properties of soil and strength characteristics (B.C., permeability, shear…etc.)

•Foundation design and construction

•Pavement design

•Design of underground and earth retaining structures

•Design of embankments and excavations

•Design of earth dams

Earth DamsThey are trapezoidal in shape• Earth dams are constructed where the foundation or the underlying material or rocks are weak to support the masonry dam or where the suitable competent rocks are at greater depth.

• Earthen dams are relatively smaller in height and broad at the base

• They are mainly built with clay, sand and gravel, hence they are also known as Earth fill dam or Rock fill dam

Earth Dams• Earth Dams, also called earthen, rolled-

earth or simply earth-fill dams, are constructed of well compacted earth.

• A homogeneous rolled-earth dam is entirely constructed of one type of material.

• Earth dams can be constructed from materials found on-site or nearby, earth dams can be very cost-effective in regions where the cost of producing or bringing in concrete would be prohibitive.

Arch Dam

STRUCTURAL ENGINEERINGIS 456: Structural engg. Is a branch of civil engg. which deals with

the planning, designing of structural members of the building such as columns, beams, slab, footings.

1.Finalizing the framework and tentative sizes of beams, columns ..etc.

2.Estimating loads on structure.3.Analyzing the structure for shear, moments, axial loads,

deflections…etc.4.Designing the structural members using results from 3.5.Preparing the detailed structural drawings for the work at site.6.Checking the work done by the contractor on site when the work

is in progress

Structural Engineering

As a structural engineer, you will face the challenge of analyzing and designing structures to ensure that they safely perform their purpose.

They must support their own weight and resist dynamic environmental loads such as hurricanes, earthquakes and floods.

Stadiums, arenas, skyscrapers, offshore oil structures, space platforms, amusement parks, bridges, office buildings, and homes are a few of the many types of projects in which structural engineers are involved.

Structural Engineering• This Branch of civil engineering deals with structural analysis

and design of structures.

• Structural analysis is done to calculate stresses in structural components, on the basis of loads, acting on structures.

• Sections of structural elements like beams, columns, slabs, etc. are designed. Structural analysis requires much calculation, hence advanced computing softwares are used to carry out structural analysis and design. It includes design of reinforced cement concrete ( RCC) and steel structures.

• Design of Multistoried buildings, towers, retaining walls, water tanks, bridges requires skills and knowledge of structural engineering.

Water Resource Engineering• means measurements, utilization and development of water resources for

agriculture, municipal and power generation purpose.

• It mainly includes irrigation engineering, design of hydraulic structures like dams, canals, etc.

• Water resource engineering deals with planning designing and developing water resources by constructing several hydraulic structures like dams, barrages, hydropower stations, canal and pipe networks etc.

• It also includes watershed planning, water harvesting techniques, soil conservation and soil reclamation.

• Hydrology is also a part of water resource engineering. Hydrology includes study of sources of water, measurement of rainfall, study of rainfall, runoff, flood control.

IRRIGATION ENGINEERING

IRRIGATION ENGINEERING

• Irrigation may be defined as the process artificially supplying water to soil for raising crops.

• It is the engineering of controlling and harnessing the various natural sources of water , by the construction of dams and reservoirs, canals and headwork and finally distributing water to the agricultural fields.

IRRIGATION ENGINEERING

•Necessity: less rainfall, non uniform rainfall, commercial crops with additional water, controlled water supply.

•Scope: –Storage, Diversion or lifting of Water –Conveyance of water to the agricultural fields –Application of water to agricultural fields –Drainage and relieving water logging –Development of water power

Watershed

• A watershed is the area of land where all of the water that is under it or drains off of it goes into the same place

TOWN PLANNING

Town Planning• Town planning means planned & controlled growth of town by

dividing town in to different land use zones and regulating building construction to provide better environment for the people of the town.

• In the town planning areas of town are divided into residential, commercial, recreational and industrial zones, which is called zoning.

• Floor space index, and other byelaws are fixed to guide and regulate the building construction.

• For towns and cities master plan for town planning schemes are prepared to accommodate future growth of town in better way.

• Planning of very large area covering several towns and villages is known as regional planning.

TOWN PLANNING

• The term town planning is used to indicate the arrangement of various components or units of a town in such a way that the town as such attains the significance of a living organism.

• It also includes ways and means to be adopted for the improvement of the existing towns or for the extension of towns.

• Objects: beauty, convenience, environment and health.

• Principles: green belt, housing, public buildings, recreation centers, road systems, transport facilities, zoning.

TOWN PLANNING

Remote Sensing

Remote Sensing • What is remote sensing?

Remote sensing refers to the activities of recording/observing/perceiving (sensing) objects or events at far away (remote) places.

The electromagnetic radiation is normally used as an information carrier in remote sensing.

The output of a remote sensing system is usually an image representing the scene being observed.

Remote sensing usually refers to the technology of acquiring information about the earth's surface (land and ocean) and atmosphere using sensors onboard airborne (aircraft, balloons) or spaceborne (satellites, space shuttles) platforms.

Remote Sensing

The sun (A) emits electromagnetic energy (B) to plants (C). A portion of the electromagnetic energy is transmitted through the leaves. The sensor on the satellite detects the reflected energy (D). The data is then transmitted to the ground station (E). The data is analysed (F) and displayed on field maps (G).

Applications of Remote Sensing

• Agriculture• Forest cover• Air pollution • Water • Climate

Remote Sensing

Applications of Remote Sensing

• Site investigations and regional planning• Terrain mapping and analysis• Town planning and development• Transportations network analysis• Landslide Studies

MODIS Snowcover (April 8th, 2000)

Surveying & Leveling

DEFINITION : Surveying is the science of map making

It is the art of determining the relative positions of distinctive features on the earth’s surface.

It is done by measurement of distances, directions and elevations.

Applications:

•Water supply and irrigation schemes

•Rail , Roads and transmission lines

•Mines, bridges and buildings

Surveying & Leveling• Surveying includes measurements of distances and angles in horizontal and

vertical planes, while leveling is the measurement of heights in vertical plane.

• Chain, compass, level and theodolite are the instruments used for surveying.

• Surveying fixes the relative positions of different points on the basis of surface of earth. It also includes measurements of areas and volumes. Basic aim of surveying is to prepare a map of the area to some scale.

• Surveying is carried out to fix the alignment of road, railway and canal. It is also useful in selecting the site for the construction of structures.

• Modern surveying instruments like Electronic total station and Geographical Positioning System(GPS) are the modern electronic digital instruments for survey works. Remote sensing and Geographical Information system(GIS) are adopted for surveying and planning of many civil engineering projects.

Electronic Total Station

A total station is an electronic/optical instrument used in modern surveying.

The total station is an electronic theodolite (transit) integrated with an electronic distance meter (EDM) to read slope distances from the instrument to a particular point.

Quantity Surveying

• Deals with measurement of quantities of various items of construction like materials, man power etc to find out probable cost of construction.

• Estimating • Costing

Purpose of Estimating • To give a reasonably accurate idea of the cost • To calculate probable cost of construction

An estimate is necessary to give the owner a reasonably accurate idea of the cost to help him decide whether the work can be undertaken as proposed or needs to be curtailed or abandoned, depending upon the availability of funds.

• For government works proper sanction has to be obtained for allocating the required amount.

• Works are often let out on a lump sum basis, in which case the Estimator must be in a position to know exactly how much expenditure he is going to incur on them

•1. Estimating Materials 2. Estimating Labor3. Estimating Plant4. Estimating Time

Types of Construction Estimates1. Approximate estimates2. Detailed estimates

1. Approximate EstimatesAn approximate estimate is an approximate or rough estimate prepared to obtain an approximate cost in a short time. For certain purposes the use of such methods is justified.

2. Detailed EstimateA detailed estimate of the cost of a project is prepared by determining the quantities and costs of every thing that a contractor is required to provide and do for the satisfactory completion of the work. It is the best and most reliable form of estimate. A detailed estimate may be prepared in the following two ways

Types of Construction Estimates

• Types of estimate• Approximate estimate• Plinth area rate estimate• Cubic rate estimate• Detailed estimate• Revised estimate• Repair and maintenance estimate

Valuation

• To determine present value of an existing property such as building, land, industry etc.

• NEED for VALUATION1. Buying and selling2. Taxation3. Rent fixation4. Security for land mortgage 5. Insurance 6. Purchase for investment

Valuation

Factors considered for valuation

1. Location2. Demand3. Present condition4. Life5. Unforeseen circumstances (wars, earthquakes etc.)

Types of Values• Scrap Value Value of dismantled materials of a property. Its about 10 % of it’s total

construction cost.

• Salvage value Value at the end of utility period

• Market Value Value in open market

• Book value Value or amount mentioned in the account book at the time of purchase

and can be obtained on deduction done by depreciation

Difference between Estimation and Costing

Estimation CostingDone before the construction Done after construction

Gives approximate cost of property Value of already constructed property

Includes finding quantities, rate analysis and cost of construction from working drawings

It includes of finding the quantities and present value of the property

Helps the owner to raise the money required for the construction work being planned by him

Helps for reselling of property, fixing rent for taking loan against property

Applications of Quantity Surveying

• To find probable as well as detailed cost of work before construction

• To find quantities of various items like beams, columns, slab etc.

• To find quantities of various materials like cement, sand, steel, bricks etc.

Role of Civil Engineers Civil engineers main role is in surveying, planning, designing,

estimation and execution of structures like buildings, roads, bridges, railways, ports, airports, dams, canals, water and waste water treatment plants, water distribution network and sewerage system.

To use scientific and engineering principles for solutions of different engineering problems

To solve different engineering problems with the help of field experience, laboratory techniques, mathematical models, using computer and information technology.

To implement management techniques for better management of man, material, machines and money.

Role of Civil Engineers To carry out planning of building as per its functional needs, as suggested by

clients or user, the building may be residential building, public building, or industrial building. He has to plan the building as per the byelaws.

To carry out soil investigations for the design of foundation of structures.

To carry out design of structures as per the principles of structural analysis and design. He should also ensure that the design is safe, durable, and economical.

To prepare the estimates to know the probable cost of completion of work.

To invite tenders & to select contractors for the works.

To carry out valuation of land or building for the purpose of finding its sale or purchase price or taxation.

Civil engineers has to work for the general welfare of people.

Roll of Civil Engineering

• Broadly be classified in three categories.

Before construction

During construction

After Construction

Before Construction

Feasibility studySurveyingSite investigationPlanningDesign and drawing Estimating Planning & Scheduling

Before Construction• In the beginning technical feasibility, environmental impact assessment

and economical viability of the project are studied.

• Surveying includes preparing site plan, contour map and measurement of field dimensions and levels.

• Soil investigation includes collecting data regarding soil and bearing capacity of soil. Soil investigations is done for the purpose of foundation design.

• On the basis of the data collected planning, designing, are carried out and drawings are prepared.

• Estimates are prepared to know the probable cost of completion of work and detailed planning and scheduling are prepared to carry out different activities in time without any delay.

During Construction

Dealing with clients

Consulting engineer and contractors

Execution and supervision

Quality control

Costing

During Construction• Owner, engineer and contractor are the three constituents of a

construction team in engineering profession, hence continuous liaison among themselves is a very essential for the speedy progress of the work.

• Execution of work is actual construction carried out on the site with materials and equipments, by the skilled and unskilled work force, under the technical guidance and supervision of engineer in charge.

• During the construction engineer has to supervise the work carried out as per the specifications for quality control.

• Costing is the accounts procedure of arriving at the actual cost of construction.

After Construction

• Maintenance and repairs After the construction regular maintenance of

structures is to be carried out

• Valuation Valuation is carried out for the purpose of

sale, purchase and many others purposes.

Construction Project Management

• Project management is the discipline of planning, organizing, securing, managing, leading, and controlling resources to achieve specific goals

Project Management

Five M’s of project management

1. Material2.Money3.Manpower4.Machines5. Management

What is a Project ???

• Temporary• Specific Objective• Start and End Date• Delivers something new and unique• Consumes resources

Big Project

Small Project

6 Basic Steps

Step 1:

Define theEnd GoalAndObjectives

Step 2:

Define theWork

Step 3:Create the Schedule

Step 4: Monitor the Progress

Step 5: Communicate

Step 6: Close it Out

People involved in Project Management

OwnerCivil EngineerArchitectContractor

Project Management Tools

• Bar charts/ Gantt Charts• CPM• PERT

Bar Chart

CPM Network

Automation in Construction