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Mass Diagram Analysis

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  1. Mass Diagram Analysis

  2. TERMINAL LEARNING OBJECTIVE ACTION: Perform mass diagram analysis. CONDITIONS: In a classroom environment given a PowerPoint presentation, student handout, mass diagram, ruler and calculator (supplied by student). STANDARDS: Performed earthwork volume calculations using mass diagram analysis .

  3. Administrative Data SAFETY REQUIREMENTS: No major safety requirements. RISK ASSESSMENT LEVEL: Low ENVIRONMENTAL CONSIDERATIONS: No major considerations. EVALUATION: Students will be evaluated on this block of instruction during the Horizontal Construction exam. The exam will consist of 50 questions. You must receive a score of 70 percent or above to receive a GO.

  4. What is a Mass Diagram? Method of analyzing earthmoving operations. It can tell us: • Where to use certain types of equipment. • The quantities of materials needed or available. • The average haul distance. • The average slope for each operation. It is one of the most effective engineer planning tools!

  5. 1000 500 Mass Diagrams are plotted from the Earthwork Volume Sheet Columns 1 and 12. V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  6. This is the Mass Diagram

  7. This is a Profile View – It shows existing and proposed elevations at the centerline of the road.

  8. 1000 Mass Ordinate Station # 500 V o l u m e 1 + 00 - 350 0 - 350 - 500 - 1000 1 + 00 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  9. 1000 Mass Ordinate Station # 500 V o l u m e 2 + 00 - 700 0 - 500 - 700 - 1000 2 + 00 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  10. 1000 Mass Ordinate Station # 500 V o l u m e 2 + 50 - 775 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  11. 1000 Mass Ordinate Station # 500 V o l u m e 3 + 00 - 700 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  12. 1000 Mass Ordinate Station # 500 V o l u m e 4 + 00 - 250 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  13. 1000 Mass Ordinate Station # 500 V o l u m e 5 + 00 450 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  14. 1000 Mass Ordinate Station # 500 V o l u m e 6 + 00 1025 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  15. 1000 Mass Ordinate Station # 500 V o l u m e 6 + 50 1080 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  16. 1000 Mass Ordinate Station # 500 V o l u m e 7 + 00 980 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  17. 1000 Mass Ordinate Station # 500 V o l u m e 8 + 00 300 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  18. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers Play “Connect the Dots”

  19. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  20. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  21. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  22. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  23. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  24. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  25. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  26. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  27. 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers

  28. 2 + 00 4 + 00 6 + 00 8 + 00 StationNumbers 1000 Are we done yet? 500 V o l u m e 0 - 500 - 1000

  29. NODE 1 NODE 2 1000 500 V o l u m e 0 - 500 - 1000 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  30. 1000 500 V o l u m e 0 FILL CUT - 500 In a Node, the volume of cut is equal to the volume of fill. - 1000 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  31. 1000 Shows the transition from cut to fill. 500 V o l u m e 0 FILL CUT - 500 Transition Point - Where the Mass Diagram Line changes direction. - 1000 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  32. 1000 Final Position 500 V o l u m e 0 Zero Balance Line - 500 Final Position indicates if the project is predominately cut or fill. - 1000 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  33. Blue line is existing elevation at centerline. 90 E l e v a t i o n Red line is finished elevation at centerline. 80 70 60 50 The amount of cut and fill are roughly balanced. 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  34. Normally, we will “Cut High and Fill Low” 90 E l e v a t i o n 80 70 60 50 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  35. Shows the transition from cut to fill. 90 E l e v a t i o n 80 70 60 50 Transition Point: Where the Existing Elevation Line and Proposed Elevation line cross. 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  36. How do we determine where on our project the Dozers and Scrapers are going to work to maximize productivity?

  37. 100 ft 200 ft 300 ft 400 ft 500 ft 500 ccy 1000 ccy 1500 ccy 2000 ccy 2500 ccy MAXIMUM HAUL DISTANCES Crawler Tractor (Dozer) 0 - 300 Feet Scraper 301 - 5000 Feet Dump Truck 5001 Feet Plus PLEASE PUT THESE NUMBERS ON YOUR STRIPPER

  38. CAT D-7 G W/ Rippers Operating range up to 300’

  39. CAT 621B Scraper Operating range 301’ to 5000’

  40. M1090 FMTV Operating range 5001’ and up

  41. MASS DIAGRAM ANALYSIS STEP 1: Determine and Draw Balance Line . STEP 2: Determine and Draw Quantity Line. STEP 3: Determine and Draw the Average Haul Distance. STEP 4: Determine Average Grade in Percent. STEP 5: Determine Station Locations for Cut and Fill Operations. STEP 6: Complete The Mass Diagram Analysis Sheet. PERFORM STEPS 1 THRU 6 FOR THE DOZER Perform steps 1 thru 6 for the scraper. Perform steps 1 thru 6 for the dump truck.

  42. STRIPPER 200 ft 100 ft 300 ft 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers STEP 1: DETERMINE AND DRAW BALANCE LINE FOR DOZER 1000 500 V o l u m e 300’ O’ 0 - 500 - 1000

  43. STEP 1: DETERMINE AND DRAW BALANCE LINE 1000 500 V o l u m e 0 - 500 STRIPPER 200 ft 100 ft 300 ft - 1000 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  44. Place a vertical “tick” mark STEP 2: DETERMINE AND DRAW QUANTITY LINE 1000 500 V o l u m e 0 - 500 - 1000 Find transition point on Node 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  45. STRIPPER 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers STEP 2: DETERMINE AND DRAW QUANTITY LINE 1000 500 V o l u m e 0 - 500 Project this line from the bottom of the Node up to the Dozer balance line. - 1000

  46. 1500 CCY 1000 CCY 500 CCY STRIPPER 1000 500 V o l u m e 0 - 500 Quantity = 500 CCY - 1000 Using your stripper as an instrument to measure VOLUME measure this line to determine the quantity of material your dozer will move. 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers

  47. Find the midpoint of the quantity line Make a “tick” mark 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers STEP 3: DRAW AND DETERMINE AVERAGE HAUL DISTANCE 1000 500 V o l u m e 0 - 500 - 1000

  48. STRIPPER 200 ft 100 ft 300 ft 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers Project the “tick mark” horizontally to both sides of the Node. 1000 500 V o l u m e 0 - 500 - 1000

  49. STRIPPER 200 ft 100 ft 300 ft 2 + 00 4 + 00 6 + 00 8 + 00 Station Numbers Using your stripper as an instrument to measure distance, measure this line. 1000 500 V o l u m e 0 - 500 - 1000