Terrain-Link Trenches™ provide accurate excavation and backfill quantities based on changing ditch depths, using the earthwork contours from your site takeoffs.
Utility Take-Off with a Difference. Many general estimating programs contain pipe or utility modules for calculating trench excavation. First a typical ditch cross section is entered, next a pipe length is either entered and finally the volumes are calculated. This type of calculation is fine for utilities that remain at an even depth below grade, such as water or conduit. Of course these are fairly easy calculations, even when calculating using manual methods.
Sanitary and Storm drainage systems are much more difficult to calculate, as the pipe runs from structure to structure in a straight line, while the trench depth varies with the terrain. Here's where InSite's Terrain Link Trenching excels.
If you have entered soil borings, your excavation quantities are listed by strata. No other software has this capability at any price! Follow along as a utility take-off in InSite SiteWork is done step by step.
Describe the excavation shape and backfill. Utility Take-offs can be done by using the earthwork take-off to general profiles, or by tracing the profiles. Either way, the first step is to create a library of Typical Ditch Cross Sections (TDS's).
The TDS describes the excavation shape (including OSHA maximum vertical side height and layback slope), pipe dimensions, and top and bottom backfill thickness.
Locate the structures. InSite will use the earthwork take-off data to create utility profiles. Each structure and connecting pipe run is entered.
Add the Structure Details. Information is then entered for each structure. and each pipe run, including the invert elevations at the end of each pipe.
If only one invert is known, a slope (percent) can be entered, and InSite will calculate the unknown invert.
Profile and Calculate. Once the structure and pipe data has been entered, it's time to calculate the results. InSite uses the earthwork data to calculate the results. A series of cross sections are taken down the trench, at user selectable intervals. As the calculations are made, a schematic showing the trench depths (cut brackets) are shown.
The RockAlert™ feature is used to give an indication of a specific strata.
See the Profiles. To View a profile, select Display/Edit profile from the pipe menu, and click on the first and last structure of the desired profile.
The profile, showing all the structures, connected pipes, and underground strata layers can be displayed. Profiles can also be printed or plotted at scale.
Once the utilities have been entered, InSite SiteWork gives complete reports.