41.What is the Time-Chainage Diagram? It is an extension of the Bar Chart (Gantt Chart).enables the time dependencies between activities to be shown, together with their order and direction of progress along the job.
52.What is the principal benefit? The principal benefit is the management of work in confined spaces where typically only one operation can be performed at a time.
73.HistoryWidely applied roadwork projects and in the development of the motorway system in UK for many yearsused for the planning of the tunnelling and fixed equipment installation on the channel tunnel projectDiscussed in proceedings of the Institution of Civil EngineersApplicable only for limited types of projectnot as widely appreciated in the industry as bar charts and network techniques.
84. Advantage of Time-Chainage chart When ConstructingRoadsRailwaysPipelinesTunnelsTransmission LinesBridges
94. Advantage of Time-Chainage chart Easy to knowThe order of activities or operationsWhere activities are happening locationallyHow activities must progress in relation to direction and distanceTime, key dates and holidays, etc.
105.Example Business of constructing the road The length of road = 3.5 KmStarting point of construction = 0+000Finishing point of construction = 3+5006 Activities on construction plan6 Steps to draw Time-Chainage Diagram
136 Steps to draw diagram Step 1 Draw the diagram layoutDecide the intervals of chainage1000m
146 Steps to draw diagram Step 2 Select either the horizontal or vertical formatDraw an outline with time and distance (chainage)Add main holiday periods allowing 2 weeks
156 Steps to draw diagram Step 3 Make the main program activities or operationsOPERATIONEXAMPLESet up siteOffices for contractor and engineerActivity 1FencingActivity 2DrainageActivity 3Bulk EarthworksActivity 4Foot BridgeActivity 5Retaining WallActivity 6Road SurfacingHolidayChristmas Shut down
166 Steps to draw diagram Step 4 Fill in the ‘site set-up’ and ‘clear site’ activities
176 Steps to draw diagram Step 5 Decide in turn where and when each activity will take place15Act11216Act2Act4-25-16Act5-16-241520Act3253035Act6Project Completion
186 Steps to draw diagram Step 6 Complete all activities on the list
196.Think about Advantage of Horizontal axis -Easy to notice that has to be constructed.Advantage of Vertical axis-More easier to read by those familiar with bar charts.The choice is a matter of personal preference.
20ReferencesICE(1992) Proceeding of the Institution of Civil Engineers. The Channel Tunnel Part 1: Tunnels. Thomas Telford.Cormican,D.(1985) Construction Management: Planning and Finance. Construction Press