Subexcavation
NOTE: The documentation below is simply for illustration on how GEOPAK interprets the various elements drawn in a cross section file. The FLH .X21 and .x30 criteria have 2 types of subexcavation criteria to do this automatically for you. The examples below do not reflect the current levels or colors used with V8.
EXISTING UNSUITABLE (must tie to existing ground, another existing unsuitable or suitable, NOT P.F.G.)
Simple example, Subexcavation= 3.37... Backfill Subexcavation = 3.37
Simply draw around the area to be subexcavated as an Existing
Unsuitable and connect to existing ground.
Below is a partial example of the earthwork summary for the cross-section shown above:
Material Name End Areas Unadjusted Adjusted Mult Mass
Station Volumes Volumes Factor Ordinate
(square (cubic (cubic
meters) meters) meters)
----------- ---------------- ---------- ---------- ---------- ------ --------
10+680.00 ITEM_NO._20401__ROADWAY_EXCAVATION
Common Exc 1.49 0 0 1.00
Subgrade Exc 0.00 0 0 1.00
Subsoil Exc 0.00 0 0 1.00
Fill 0.00 0 0 1.00 0
ITEM_NO._20402__SUBEXCAVATION
Common Exc 0.00 0 0 1.00
Subgrade Exc 0.00 0 0 1.00
Subsoil Exc 3.37 0 0 1.00
Fill 0.00 0 0 1.00 0
Mass ordinate for ITEM_NO._20402__SUBEXCAVATION = 0
SUITABLE
Common Exc 0.00 0 0 1.00
Subgrade Exc 0.00 0 0 1.00
Subsoil Exc 0.00 0 0 1.00
Fill 8.08 0 0 1.00 0
In this example, only the area below subgrade (A=3.37) will be backfilled with a special material. The layers above the yellow area will be constructed of various surfacing materials shown in the earthwork log file as "Undercuts". Notice that the subexcavation quantity is not reflected in the Mass Ordinate, however the backfill for the subexcavation, (A=3.37) is combined with the General Fill, (A=4.70) for a combined "General" fill end area of 8.07.
For the correct General Fill volume, (shown on the last page of the earthwork log file), the Grand Total of SUBEXCAVATION "Subsoil Exc." needs to be subtracted from the Grand Total GENERAL "Fill".
Another way to achieve the correct General Fill volume is to simply rerun the earthwork input file with the "Existing Unsuitable" for SUBEXCAVATION commented out.
MORE SUBEXCAVATION:
EXISTING UNSUITABLE (must tie to existing ground, another existing unsuitable or suitable, NOT P.F.G.)
More complicated example, Subexcavation= 2.87... Backfill Subexcavation = 2.87
See the following illustrations for "step by step" instructions on how to draw the elements and achieve these results.
Below is a partial example of the earthwork summary for the cross-section shown above:
Material Name End Areas Unadjusted Adjusted Mult Mass
Station Volumes Volumes Factor Ordinate
(square (cubic (cubic
meters) meters) meters)
----------- ---------------- ---------- ---------- ---------- ------ --------
10+780.00 ITEM_NO._20401__ROADWAY_EXCAVATION
Common Exc 0.40 76 76 1.00
Subgrade Exc 1.17 18 18 1.00
Subsoil Exc 0.00 0 0 1.00
Fill 0.00 0 0 1.00 281
ITEM_NO._20402__SUBEXCAVATION
Common Exc 0.00 0 0 1.00
Subgrade Exc 0.00 0 0 1.00
Subsoil Exc 2.87 61 61 1.00
Fill 0.00 0 0 1.00 281
Mass ordinate for ITEM_NO._20402__SUBEXCAVATION = 348
SUITABLE
Common Exc 0.00 0 0 1.00
Subgrade Exc 0.00 0 0 1.00
Subsoil Exc 0.00 0 0 1.00
Fill 4.02 77 77 1.00 204
In this example, only the area below subgrade (A=2.87) is supposed to be backfilled with a special material. All the areas above subgrade including the areas shown as A=1.14 & A=0.03, will be constructed of various surfacing materials shown in the earthwork log file as "Undercuts". Notice that the subexcavation quantity is not reflected in the Mass Ordinate, however the backfill for the subexcavation, (A=2.87) is combined with the General Fill, (A=1.15) for a combined "Suitable" fill end area of 4.02.
For the correct General Fill volume, (shown on the last page of the earthwork log file), the Grand Total of SUBEXCAVATION "Subsoil Exc." needs to be subtracted from the Grand Total Suitable "Fill".
Another way to achieve the correct General Fill volume is to simply rerun the earthwork input file with the "Existing Unsuitable" for SUBEXCAVATION (LV=58 CO=58) and "Existing Suitable" (LV=54 CO=54) commented out.
- Draw the Existing Unsuitable at LV=58, CO=58. Connect to existing ground, (LV=56).
- Draw the Existing Suitable at LV=54, CO=54, by tracing the subgrade, beginning at the right edge of the Existing Unsuitable, and drawing left ...to the intersection of the Existing Unsuitable and existing ground.
- The drawing above illustrates the finished drawing and all of the correct connections for the Proposed Undercut, Existing Suitable, and Existing Unsuitable.
Below is the complete log file containing the earthwork input file and the results.
For this example... I'm ignoring discussing the Proposed Undercuts, on levels 3 through 6. THEY ARE DRAWN BY CRITERIA AND ARE AUTOMATICALLY CALCULATED BY THE EARTHWORK INPUT FILE.
Input File: ew_x08.inp Output File: subex.log 1 1 1 1 2 2 1 3 3 Earthwork 1 4 4 1 5 5 tolerance = 0.001 1 6 6 1 7 7 xs dgn = ew_test.dgn 1 8 8 1 17 17 1 18 18 Existing Suitable Material 1 19 19 soil type = rock 1 20 20 roadway exc mult factor = 1.10 1 21 21 subsoil exc mult factor = 1.10 1 22 22 fill mult factor = 1.00 1 23 23 type = line 1 24 24 lv = 57 1 25 25 co = 57 1 26 26 1 35 35 1 36 36 1 45 45 1 46 46 1 47 47 Existing Unsuitable Material 1 48 48 soil type = ex_pave1 1 49 49 roadway exc mult factor = 1.00 1 50 50 subsoil exc mult factor = 1.00 1 51 51 fill mult factor = 1.00 1 52 52 type = line 1 53 53 lv = 45 1 54 54 co = 0 1 55 55 1 56 56 Existing Unsuitable Material 1 57 57 soil type = ex_pave2 1 58 58 roadway exc mult factor = 1.00 1 59 59 subsoil exc mult factor = 1.00 1 60 60 fill mult factor = 0.00 1 61 61 type = line 1 62 62 lv = 46 1 63 63 co = 3 1 64 64 1 65 65 Existing Unsuitable Material 1 66 66 soil type = Item_No._20801__STRUCTURE_EXCAVATION 1 67 67 roadway exc mult factor = 1.00 1 68 68 subsoil exc mult factor = 1.00 1 69 69 fill mult factor = 1.00 1 70 70 type = line 1 71 71 lv = 55 1 72 72 co = 55 1 73 73 1 74 74 1 75 75 /* added lv = 46 & co = 3 */ 1 84 84 1 85 85 1 86 86 Proposed Undercut 1 87 87 soil type = Item_No._40101__HOT_ACP 1 88 88 roadway exc mult factor = 0.000001 1 89 89 subsoil exc mult factor = 0.000001 1 90 90 fill mult factor = 0.000001 1 91 91 type = line 1 92 92 lv = 3 1 93 93 co = 3 1 94 94 1 95 95 Proposed Undercut 1 96 96 soil type = Item_No._30201__EMULSIFIED_BASE_GR_D 1 97 97 roadway exc mult factor = 0.000001 1 98 98 subsoil exc mult factor = 0.000001 1 99 99 fill mult factor = 0.000001 1 100 100 type = line 1 101 101 lv = 4 1 102 102 co = 4 1 103 103 1 104 104 Proposed Undercut 1 105 105 soil type = Item_No._30101__AGGREGATE_BASE_GR_D 1 106 106 roadway exc mult factor = 0.000001 1 107 107 subsoil exc mult factor = 0.000001 1 108 108 fill mult factor = 0.000001 1 109 109 type = line 1 110 110 lv = 5 1 111 111 co = 5 1 112 112 1 121 121 1 122 122 Proposed Undercut 1 123 123 soil type = FOUNDATION_FILL 1 124 124 roadway exc mult factor = 0.000001 1 125 125 subsoil exc mult factor = 0.000001 1 126 126 fill mult factor = 0.000001 1 127 127 type = line 1 128 128 lv = 7 1 129 129 co = 7 1 130 130 1 131 131 Proposed Undercut 1 132 132 soil type = Item_No._25103__KEYED_RIPRAP 1 133 133 roadway exc mult factor = 0.000001 1 134 134 subsoil exc mult factor = 0.000001 1 135 135 fill mult factor = 0.000001 1 136 136 type = line 1 137 137 lv = 9 1 138 138 co = 9 1 139 139 1 140 140 Proposed Undercut 1 141 141 soil type = Suitable 1 142 142 roadway exc mult factor = 0.000001 1 143 143 subsoil exc mult factor = 0.000001 1 144 144 fill mult factor = 1.0 1 145 145 type = line 1 146 146 lv = 11 1 147 147 co = 11 1 148 148 1 149 149 1 150 150 /*Proposed Undercut 1 151 151 common excavation only 1 152 152 soil type = select_borrow 1 153 153 roadway exc mult factor = 1.00 1 154 154 subsoil exc mult factor = 1.00 1 155 155 fill mult factor = 1.10 1 156 156 type = line 1 157 157 lv = 59 1 158 158 co = 59 */ 1 159 159 1 160 160 Excavation Limits 1 161 161 type = line 1 162 162 lv = 43 1 163 163 co = 0 1 164 164 1 165 165 1 166 166 Write Earthwork Shapes 1 167 167 plot param 1 168 168 lv = 52 1 169 169 co = 0 1 170 170 wt = 0 1 171 171 lc = 0 1 172 172 Stratify Shape Color 1 173 173 1 174 174 /* combine common exc + subgrade exc + subsoil exc */ 1 175 175 1 176 176 Process Earthwork for Baseline = a 1 177 177 job number = 123 1 178 178 1 179 179 beg sta = 10+680 1 180 180 end sta = 10+780 1 181 181 MAPPING DGN FILE INTO MEMORY COMPUTING EARTHWORKS FOR BASELINE = A COMPUTING EARTHWORKS FOR JOB = 123 FORMING LIST OF XSCELLS BEGINNING EARTHWORKS COMPUTATION Material Name End Areas Unadjusted Adjusted Mult Mass Station Volumes Volumes Factor Ordinate (square (cubic (cubic meters) meters) meters) ----------- ---------------- ---------- ---------- ---------- ------ -------- 10+700.00 ITEM_NO._20401__ROADWAY_EXCAVATION Common Exc 6.31 78 78 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 0.00 0 0 1.00 78 ITEM_NO._20402__SUBEXCAVATION Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 3.68 71 71 1.00 Fill 0.00 0 0 1.00 78 Mass ordinate for ITEM_NO._20402__SUBEXCAVATION = 71 SUITABLE Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 7.01 151 151 1.00 -73 ITEM_NO._40101__HOT_ACP Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.54 11 0 0.00 -73 ITEM_NO._30201__EMULSIFIED_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.42 8 0 0.00 -73 ITEM_NO._30101__AGGREGATE_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 1.09 22 0 0.00 -73 ITEM_NO._20407_SELECT_TOPPING Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 2.28 46 0 0.00 -73 10+720.00 ITEM_NO._20401__ROADWAY_EXCAVATION Common Exc 10.39 167 167 1.00 Subgrade Exc 0.24 2 2 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 0.00 0 0 1.00 96 ITEM_NO._20402__SUBEXCAVATION Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 3.21 69 69 1.00 Fill 0.00 0 0 1.00 96 Mass ordinate for ITEM_NO._20402__SUBEXCAVATION = 139 SUITABLE Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 5.50 125 125 1.00 -29 ITEM_NO._40101__HOT_ACP Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.54 11 0 0.00 -29 ITEM_NO._30201__EMULSIFIED_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.42 8 0 0.00 -29 ITEM_NO._30101__AGGREGATE_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 1.09 22 0 0.00 -29 ITEM_NO._20407_SELECT_TOPPING Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 2.28 46 0 0.00 -29 10+740.00 ITEM_NO._20401__ROADWAY_EXCAVATION Common Exc 11.51 219 219 1.00 Subgrade Exc 0.20 4 4 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 0.00 0 0 1.00 194 ITEM_NO._20402__SUBEXCAVATION Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 4.19 74 74 1.00 Fill 0.00 0 0 1.00 194 Mass ordinate for ITEM_NO._20402__SUBEXCAVATION = 213 SUITABLE Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 5.50 110 110 1.00 84 ITEM_NO._40101__HOT_ACP Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.54 11 0 0.00 84 ITEM_NO._30201__EMULSIFIED_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.42 8 0 0.00 84 ITEM_NO._30101__AGGREGATE_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 1.09 22 0 0.00 84 ITEM_NO._20407_SELECT_TOPPING Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 2.28 46 0 0.00 84 10+760.00 ITEM_NO._20401__ROADWAY_EXCAVATION Common Exc 7.23 187 187 1.00 Subgrade Exc 0.61 8 8 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 0.00 0 0 1.00 279 ITEM_NO._20402__SUBEXCAVATION Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 3.19 74 74 1.00 Fill 0.00 0 0 1.00 279 Mass ordinate for ITEM_NO._20402__SUBEXCAVATION = 287 SUITABLE Common Exc 0.00 0 0 1.00 Subgrade Exc 0.00 0 0 1.00 Subsoil Exc 0.00 0 0 1.00 Fill 3.65 92 92 1.00 187 ITEM_NO._40101__HOT_ACP Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.54 11 0 0.00 187 ITEM_NO._30201__EMULSIFIED_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 0.42 8 0 0.00 187 ITEM_NO._30101__AGGREGATE_BASE_GR_D Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 1.09 22 0 0.00 187 ITEM_NO._20407_SELECT_TOPPING Common Exc 0.00 0 0 0.00 Subgrade Exc 0.00 0 0 0.00 Subsoil Exc 0.00 0 0 0.00 Fill 2.28 46 0 0.00 187 . G R A N D S U M M A R Y T O T A L S Material Name Unadjusted Adjusted Mult Volumes Volumes Factor (cubic (cubic meters) meters) ---------------------------- ---------- ---------- ------ ITEM_NO._20401__ROADWAY_EXCAVATION Common Exc 728 728 1.00 Subgrade Exc 33 33 1.00 Subsoil Exc 0 0 1.00 Fill 0 0 1.00 ITEM_NO._20402__SUBEXCAVATION Common Exc 0 0 1.00 Subgrade Exc 0 0 1.00 Subsoil Exc 348 348 1.00 Fill 0 0 1.00 SUITABLE Common Exc 0 0 1.00 Subgrade Exc 0 0 1.00 Subsoil Exc 0 0 1.00 Fill 554 554 1.00 ITEM_NO._40101__HOT_ACP Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 54 0 0.00 ITEM_NO._30201__EMULSIFIED_BASE_GR_D Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 42 0 0.00 ITEM_NO._30101__AGGREGATE_BASE_GR_D Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 109 0 0.00 ITEM_NO._20407_SELECT_TOPPING Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 228 0 0.00 B A L A N C E P O I N T S U M M A R Y Material Name Unadjusted Adjusted Mult Volumes Volumes Factor (cubic (cubic meters) meters) ---------------------------- ---------- ---------- ------ Station = 10+725.04 ITEM_NO._20401__ROADWAY_EXCAVATION Common Exc 300 300 1.00 Subgrade Exc 4 4 1.00 Subsoil Exc 0 0 1.00 Fill 0 0 1.00 ROCK Common Exc 0 0 1.10 Subgrade Exc 0 0 1.10 Subsoil Exc 0 0 1.10 Fill 0 0 1.00 ITEM_NO._20402__SUBEXCAVATION Common Exc 0 0 1.00 Subgrade Exc 0 0 1.00 Subsoil Exc 158 158 1.00 Fill 0 0 1.00 EX_PAVE1 Common Exc 0 0 1.00 Subgrade Exc 0 0 1.00 Subsoil Exc 0 0 1.00 Fill 0 0 1.00 EX_PAVE2 Common Exc 0 0 1.00 Subgrade Exc 0 0 1.00 Subsoil Exc 0 0 1.00 Fill 0 0 1.00 ITEM_NO._20801__STRUCTURE_EXCAVATION Common Exc 0 0 1.00 Subgrade Exc 0 0 1.00 Subsoil Exc 0 0 1.00 Fill 0 0 1.00 SUITABLE Common Exc 0 0 1.00 Subgrade Exc 0 0 1.00 Subsoil Exc 0 0 1.00 Fill 304 304 1.00 ITEM_NO._40101__HOT_ACP Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 24 0 0.00 ITEM_NO._30201__EMULSIFIED_BASE_GR_D Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 19 0 0.00 ITEM_NO._30101__AGGREGATE_BASE_GR_D Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 49 0 0.00 ITEM_NO._20407_SELECT_TOPPING Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 103 0 0.00 FOUNDATION_FILL Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 0 0 0.00 ITEM_NO._25103__KEYED_RIPRAP Common Exc 0 0 0.00 Subgrade Exc 0 0 0.00 Subsoil Exc 0 0 0.00 Fill 0 0 0.00