How to create a ditch in civil 3d


  • E-Learning Menu
  • AutoCAD Civil 3D Tip: It's All in the Expression
  • CivilCAD/ZWCAD Civil
  • Creating an Assembly in Civil 3D 2021
  • Farm Field Drainage Ditch
  • E-Learning Menu

    Civil 3D Polyline dynamic grip editing only works the first time. For more info see this KB article. There is also a user supplied video of this happening. No Civil 3D Under certain circumstances, file size can grow by several times what it should be. It is related to surfaces in data shortcuts. Sort of. See this forum post. Civil 3D Unknown If you open a drawing that contains only a dynamic block, you are prompted to go directly into the block editor.

    Fixed in Civil 3D When you insert a point from the Survey database, it automatically zooms you to that point. There is no way to control this. Fixed in Civil 3D?? Multiple fatal errors ensue. No Civil 3D The recent files list in the application menu, and in the Startup dialog box if enabled always floats sheet set files. No Civil 3D?? Fixed in SP1 Civil 3D If you click a column header to sort the parcel listing in the prospector, the list disappears.

    More info and a workaround here. Fixed in SP2 Civil 3D When plotting from model space, and using the window selection method, if you zoom with the scroll wheel while picking your window in the graphics window, you get an error and have to press ESC several times to get out of a loop. Some people report that the loop is impossible to get out without killing AutoCAD.

    Closing and opening the layer properties manager palette will generally restore the smaller spacing between layer names. Forum post with screenshots. No Civil 3D When labeling contours using the. Workaround is to make sure the current layer is not locked. No Civil 3D Surface analysis results are lost during a rebuilt or synchronization. More info here. Not tested by us. Autodesk has provided a manually applied workaround, available here. Yes and No Civil 3D All?

    There is no way to sort the report on any column. Might be considered a missing feature, but the grid control in the dialog contains standard click-able headers that in any other dialog, DO perform a sort. More info here , including a workaround. Autodesk Support has been confirmed as defective. Details here.

    AutoCAD Civil 3D Tip: It's All in the Expression

    The table below gives some examples of different sizes of culverts. The situation of bare land with light vegetation and steep slopes has a higher runoff coefficient than forest land with heavy vegetation terrain and gentle slopes. For an intermediate terrain the pipe size can be interpolated. If the suggested pipe size is not available, the next larger pipe size should be used. The outlet of a culvert pipe should ideally be located in a stable, non-erosive area.

    Well-vegetated or rocky areas are good places to locate a culvert. Water flowing from a culvert can cause erosion problems where it discharges directly on to erosive soil. Channel protection, riprap or other structural solutions are not as good as a correctly sized and well placed pipe.

    Such roads can be main road intersections or simple private access roads. The function of the access road culverts is to provide a continuation of the main road ditch through the side road as if the road did not exist.

    According to old Finnish guidelines the minimum size of exit road culvert should be mm when the length of culvert is more than 8m. If the length is less than 8m, the minimum size can be mm. The length of the culvert will depend on the width of the access road and is often large where there are shops, petrol stations and other businesses.

    Access road culverts have historically had a smaller diameter than main road culverts and the water also has a lower flow velocity. These smaller diameter culverts can clog and cause water to infiltrate into the layers of the main road and weaken them, or cause severe erosion problems. In Finland the owner is often a private person and the maintenance responsibility of the culvert belongs to the owner of the access road.

    This can cause problems as often these private persons neglect their responsibility for keeping the culvert clean. Quite often the culverts are also too small or built incorrectly. This creates problems to the road drainage and leads to damages in the main road.

    In Sweden the owner of access road culvert is the road administrator Trafikverket and the responsibility for maintenance belongs to them. In Scotland too, the responsibility for the maintenance of access road culverts falls on the road authority i. In Norway the ruling is similar to Sweden. Most of the access road culverts lie in this area and so the NPRA is responsible for them.

    In Iceland private landowners have to pay all costs concerning their access road culverts. ICERA owns 20 metros of land on both sides of the road from the centre line. In Greenland the private landowner builds the access road culvert, but the municipality then takes responsibility for its maintenance. The main purpose of the filter course in road drainage is to cut the capillary rise to the road structural courses above of it.

    Filter course material should be well graded with a maximum grain size of The filter course is the lowermost structural layer and is normally spread across the bottom of the excavation. A filter course should always be used in the road structure when the sub grade is frost-susceptible like clay, silt and silty moraine.

    The filter course is normally separated from the sub grade soil by a geotextile. Geotextile composites can also be used as drainage layers. A plastic rigid core is sandwiched between geotextiles. The carpet is laid out on even ground and covered with a layer of aggregates that is thick enough thick to protect the carpet from the action of heavy vehicle loads. Porous asphalt is used in countries suffering from large amounts of rainfall.

    This special asphalt mix ensures a fast drainage of water away from the pavement surface. Water does not easily collect on a porous asphalt surface during the heavy rains as the majority of the stones in the mixture are of a similar size i.

    The thickness of a porous asphalt layer is typically mm and it is placed on top of an impermeable asphaltic base. Although the material is good in wet conditions, it has a few disadvantages.

    It has a lack of durability and it has to be ensured that there is enough bitumen to coat the stones. If there is too much bitumen, the mixture will rut easily and the pores will block with bitumen. If there is too little bitumen, raveling will occur. Porous asphalt can become clogged and lose its efficiency with the ingress of particulates and dust from the environment, blown soil, engine wear and cargoes.

    Snow, ice and de-icing salts in winter can also clog the pores and prevent the flow of water. Finally, special materials such as foamed recycled glass have been used as drainage and frost insulation layers. Wood bark has also been used In forest roads. The purpose of these vertical drainage structures is to remove the groundwater and keep the sub grade dry under the road. Vertical subsurface drains can be divided in two main groups; 1 interceptor drains and 2 water table lowering drains.

    It can sometimes be more cost effective to use vertical drainage structures than adding a thick structural section to the road, or making frequent road repairs. This is the case especially with high volume roads. A typical under drain comprises an interceptor trench depth of metres and a backfill.

    The drains are usually filled with a highly permeable material, wrapped in a geotextile, with a perforated tube or permeable material near the bottom. These types of drainage systems are usually placed at the edge of the pavement structure, parallel to the road centerline. It is made of round or crushed aggregate.

    In earlier years the drain was installed without a pipe in its base but currently some form of carrier drain pipe is usually included. The geotextile wrapping fabric is provided to prevent migration of fine soil particles into the drain and clogging it. The geotextile should be water permeable allowing water to flow freely from the surrounding ground into the drain. A step by step-example of how to make the Trench drain: 1.

    Excavate a narrow trench 2. Clean out the excavated trench 3. Line the surfaces of the excavation with a geotextile 4. Place a layer of aggregates in the bottom of the lined trench 5. Install a carrier pipe if needed 6. Fill the drain with aggregates 7. Close the drain and wrap over the geotextile minimum overlap is 30cm 8.

    Cover the closed drain surface with at least cm of top soil or other low permeability material. If surface runoff is to be collected also the covering material should be permeable. Fin drains are longitudinal drains, manufactured from composite materials. A fin drain usually comprises two geotextiles outer faces, to provide a filter function with the surrounding soil, and a rigid plastic core that is sandwiched between geotextiles.

    A fin drain can also feed into an integral collector at the bottom of the drain. Water flows through the geotextile facings into the core that then transports the water to an outlet ditch. Gentle slopes are friendlier for the environment, are better for traffic safety and have a higher resistance against erosion. The inclination of a typical slope will depend on the road category rural road, main road, motorway etc. The recommended inclination for an inner slope on a main road according to old Finnish guidelines is a minimum of and for outer slopes a minimum of Poor slope stability can cause problems to the drainage of a road and result in road damages.

    Material flowing to the bottom of a ditch can block the water flow in the ditch and lead to water infiltrating into the road structures.

    This can then lead to differential frost heave and shoulder deformation. ROADEX research has shown that unstable slopes are one of the main reasons for road failures in test roads in Finland. A special problem that has found to cause problems is that water susceptible material from the ditch bottom has been placed back to inner slope during the ditch cleaning. This material is then flowing quickly back to the ditch bottom and leading to further problems with the road.

    Usually this is a natural water system such as a river, lake or channel. The purpose of a soakaway is to dispose of water back into the natural circulation from where it came, i. Soakaways can only be used in porous subgrades and not, for example, in clay areas. Soakaways have to be individually designed for size and capacity. The finished soakaway space must be kept open and free from clogging to remain effective.

    CivilCAD/ZWCAD Civil

    Creating an Assembly in Civil 3D 2021

    Civil 3D Expressions are mathematical expressions that can be used in place of static values in Label Styles. We will use Expressions to modify the data in the standard label style components. Expressions are stored in the Settings tab of the Toolspace, within the Label Style folders. In this example, we will be using Expressions to control the size of our label text for the specific condition of controlling their display in the right ditch of our section.

    We are going to replace that value with an expression. Our first expression we create will control the text height of the Slope Ratio label on our sideslopes. Since our right ditch labels are overlapping because of the smaller size of the ditch, we will use the size value of the slope link to determine the size of our label text.

    Now we need to add our new expression to our Label Style. If we open our Label Style Composer for our Slope Ratio label and click on the Text Height value, we will now see our expression available in a drop down menu.

    Create pit and pipe schedules directly from your designs. Using the Long Section plotting tools you can rapidly generate an industry standard output for your designs directly inside the AutoCAD drawing with control over the sheet layout and data included.

    Publish directly to AutoCAD as separate files or as layouts in the current drawing. Built specifically for the Australian stormwater drainage designer and applying the principles of the Australian Rainfall and Runoff manual and Rational Method design, Civil Site Design Pipes is a complete tool for designers wanting to create underground stormwater drainage systems.

    Easily create drainage catchments directly from a Surface and polyline — catchment style libraries allow you to easily assign catchment criteria for common catchment types. When a network is created the design flows are calculated and pipe sizes and levels are automatically assigned to manage the flows as well as minimum cover, slope and flow velocities. As you make changes to pipe sizes and levels the Hydraulic Grade Line and all design information for each pipe automatically updates.

    Using the Long Section plotting tools you can rapidly generate industry standard outputs of your designs directly inside the AutoCAD drawing, complete with HGL and other stormwater details and ready for immediate plotting.

    Civil Site Design Pipes incorporates a comprehensive set of sewer pipe design tools. Each house connection can be viewed in a Vertical Design window for editing and adjustment. All house connections, service obstructions and other networks display as crossing pipes, including clearance controls — as you make changes to pipe sizes and levels you can immediately identify and address any conflicts.

    Using the Long Section plotting tools you can rapidly generate industry standard outputs of your designs directly inside the AutoCAD drawing, including house connection controls and ready for immediate plotting. Plan drafting occurs directly in the AutoCAD drawing including selected attributes from your design specific to sewer design.

    Farm Field Drainage Ditch

    Use Civil Site Design Stormwater pipe tools to rapidly lay out a pipe network in the drawing and account for slope and cover rules for the surface. Assign rainfall catchments using the drawing geometry and surface data directly, and include underground services for clash detection during design.

    Plot to layouts in the drawing or external. Civil Site Design for Site Grading Built for rapid design of features such as building pads and detention basins, the dynamic grading tools automatically clean up internal overlapping corners and include radial and mitre options on external corners.

    With the Site Grading tools you can take a polyline, apply a cross section template assembly to create a graded surface complete with corner cleanup. The surface and grading linework automatically updates as you edit your grading, so you get immediate feedback on the impact of your design changes, as you make them.

    You can immediately review volume outputs after making design changes, enabling easy volume checking and optimization. Use the Civil Site Design Surface Modelling tools to create one total dynamic surface model incorporating all your land development components — perfect for lot grading.

    Volume calculations in Civil 3D can be made by exporting the grading surface out as a Civil 3D surface object. The grading tools support cross section templates assemblies and intelligent batter designs to address specific site design requirements.

    As well, you can combine template and string based designs into the grading models to get the fine level of control you require. The quick elevation viewer makes it even easier to apply changes to your grading string levels and see the results. You can use both the vertical grading design tools and the quick elevation viewer to make edits to the design — change IP positions along the grading, edit and add vertical curves, either in a grid view or using a graphical vertical design display.

    Civil Site Design Surface Modeling Surface creation is quick and easy with support for multiple data inputs, intuitive display controls and outputs dynamically represented directly inside the drawing, ready for plotting and publishing. The Surface model inputs support external point data and Land XML files as well as reading 3D data directly from the drawing.

    Surface display controls are immediately accessible to you, allowing for fast and dynamic adjustments to contour intervals, colors, layers, contour labeling and surface analysis.


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