secciones geotecnias

8/12/2019 Secciones Geotecnias

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Create Section

Generate Lines of Cross Section

The Create Section option allows you to create reference section lines. These are lines in plan atthe datum level, and define the position of the sections. Each section (reference line) has a name

in the format of where = a user allocated name, = an automaticallyincreasing number.

There are seven available methods for generating section lines:

Single Section (digitise two points in plan).Long Section (digitise a string, two or more points).Parallel Sections (give separation, two points for the first section and a direction).Perpendicular Sections (give a separation, offsets and a reference line).X Axis (give a separation and a major surface. All sections through selected surface arecreated).Y Axis (give a separation and a major surface. All sections through selected surface are

created.XS on LS (give separation and section line).

Note:

This option can only be used when in Plan View.

Instructions:

Select Geotech menu

Select Section submenuSelect Create Section option

The Type of section dialog box is displayed. From this box, select a method in which to createsection lines.

Each method is described in detail below.

Single SectionLong SectionParallel SectionsPerpendicular SectionsX AxisY AxisXS on LS

Single Section

The Single Section method allows you to create a single section line at a nominated positionacross the selected layer.

Once selected, the following panel is displayed.

Pgina1 de 7Envisage : Geotech : Section : Create Section

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Single section line panelSection name

The maximum size of the section name is 10 alphanumeric characters. Section names mustbe unique. If you enter a section name that already exists, then that section's data will belost and replaced with the new section.

Select OK .

Digitise the first point of the section line, followed by the second point. Any of the design entrymodes can be used.

Once indicated, a line is generated between the nominated points at the default datum level(specified through the Set Up option).

Long Section

The Long Section method allows you to create a single long section, which is a series of singlesection lines chained together.


Long section line panelLong Section name

The maximum size of the long section name is 10 alphanumeric characters. Section namesmust be unique. If you enter a long section name that already exists, then that longsection's data will be lost and replaced with the new long section.

Select OK .

Digitise the first point of the section line, followed by the next set of points. Any of the design entrymodes can be used.

Once a point is indicated, a line is generated between the previous and next point at the defaultdatum level (specified through the Set Up option). Cancel to finish digitising points.




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Parallel Sections

The Parallel Sections method of generating section lines requires you to define a baseline, byindicating two points, against which the parallel sections are created. A third point determines theextent of the section lines.

Diagram 1 - Parallel Method


Parallel sections panelSection prefix

This is used in the name of the generated sections.Numbering offset

Enter the starting number for the sections.

The names of the generated sections will be in the format of where = theprefix entered above, = an increasing value entered as the Numbering offset .

For example, if prefix ' A' was used in Diagram 1 with a numbering offset of ' 1 ', then the resultingsections would be named A1 , A2 , A3 , A4 , A5 , A6 respectively.

SeparationEnter the distance between successive parallel sections.

Select OK .

Digitise the first point of the section line. Any of the design entry modes can be used.




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Digitise the second point of the section line, followed by the approximate finish.

Once digitised, and depending on the separation entered, the appropriate number of equallyspaced cross section lines are then generated.

Perpendicular Sections

The Perpendicular Sections method of generating section lines requires you to define analignment line by indicating two points. The section lines are created perpendicular to this line asshown in Diagram 2.

Diagram 2 - Perpendicular


Perpendicular sections panelSection prefix

This is used in the naming of the generated sections.Numbering offset






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For example, if prefix ' A' was used in Diagram 2 with a numbering offset of ' 1 ', then the sectionswould be named A1 , A2 , A3 , A4 , A5, A6 and A7 respectively.


Left/Right side offsetEnter the distance that each section line is to extend to the left or right of the alignment line.

Select OK .

Digitise the first point of the alignment line, followed by the second point. Any of the design entrymodes can be used when digitising these points.

Once indicated, the section lines are generated at equal spacing and perpendicular to the alignmentline.

X Axis

The X Axis method allows you to equally generate spaced vertical section lines (i.e. North - South)at a nominated interval across the area of the selected triangulated surface.

Diagram 3 - X Axis


X axis sections panel




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Section prefixThis is used in the naming of the generated sections.

Numbering offsetEnter the starting number for the sections.


For example, if prefix ' A' was used in Diagram 3 with a numbering offset of ' 1 ', then the sectionswould be named A1 , A2 , A3 , A4 , A5, A6 respectively.


Select OK .

Select the major survey or design model. This refers to the triangulation model over which thesection lines are to be generated.

Once indicated, a series of equally spaced vertical lines will be generated that cover the extent of the selected triangulation.

Note:

The last two section lines may not have the same spacing as the others as the last section lineis generated at the extent of the model and not beyond.

Y Axis

The Y Axis method allows you to generate equally spaced horizontal section lines (i.e. East-West)at a nominated interval across the area of a selected triangulation model.

Diagram 4 - Y Axis

Refer to the X Axis method for a description, as the only difference between the X Axis and Y Axismethods is that the Y Axis method generates horizontal section lines instead of vertical lines.




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XS on LS

The XS on LS method allows a series of section lines to be generated along, and perpendicular, toa long section line. This method is similar to the Perpendicular Sections method , except that a longsection line is used for the alignment.


XS on LS panelSection prefix

This is used in the naming of the generated sections.Numbering offset




Left/Right side offsetEnter the distance that each section line is to extend to the left or right of the alignmentline.

Select OK .

Select a section line. ie. a single section or a long section line. Once selected, the line is then usedas the alignment line for generating the new equally spaced section lines. If you select an objectthat is not a section line, then an error message is displayed and you are again prompted to selecta section line.


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