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• Route and Platform Design Guide

Route and Platform Design Guide

This guide provides you with operation suggestions of wind farm route and platform design in Greenwich. The related references of design is also offered. Read this section to get acquainted with the design procedures and regulations.

Design References

Since industry regulations for wind farm route design have not been published, the design references for route and platform are mainly general specifications in road design, as well as other general specifications in related industries as substation, manufactural enterprise, architecture, fire protection, etc. The details are listed below:

• Code for design of wind power production GB 51096
• Regulation for feasibility study report compilation of onshore wind farm engineering NB∕T 31105-2016
• Technical standard for road engineering JTG B01
• Anti-seismic code for road engineering JTG B02
• Code for design of road environment protection JTG B04
• Code for design of road path JTG D20
• Code for design of road subgrade JTG D20
• Technical code for road subgrade construction JFG F10-2006
• Technical specifications of road surface base construction JTG/T F20-2015
• General code for design of road, bridge and culvert JTG D60
• Specifications for design of road tunnel JTG D70
• Code for design of road and transportation security facility JTG D81
• Code for building design for fire protection GB 50016 -2014
• Code for design of factory and mine roads GB J22-87
• Code for design of manufactural enterprise general layout GB 50187-2012
• Code for design of fire protection in thermal power plant and substation GB 50229-2006
• Code for design of 35kV - 110kV substations (GB 50059-2011)

Operation Procedure and Related Suggestions

This section introduces the main operations in route and platform design and related parameter setup guidelines.

Basic Operation

For main operation steps in Greenwich route and platform, refer to the user guide in Greenwich documents.

Route Design

Route design is classified into two categories: out-field route design and in-field route design. Refer to the following sections for more information.

Out-Field Route

Out-field route design utilize existing road network to calculate route scheme.

Special actions should be taken if you encounter the following conditions:

• The approximate out-field route is determined by highway exit selection. Select the highway exit with wide lane accord to the standard. Verify the width on site if necessary.
• For roads below the prefectural road level (excluding prefectural road) which are located in area with many right-angled turnings and houses, define them as prohibited areas.
• If out-field route, such as national road, provincial road, prefectural road, crosses with highway and railway, pay attention to the vertical relationship (over crossing is not influential). In situation of culvert, verify the head room and passibility on site.
• If there are buildings at road turning that cannot be dismantled, such as high-level transformer foundation, culture relic, etc., define them as prohibited areas.
• For long-span bridges over roads below the prefectural road level (excluding prefectural road), verify the load capacity and passibility on site.

In-Field Route

• For operation details of existing road network, refer to the section Out-Field Route.

• It is recommended to utilize existing road network as in-field route and reorganize and expanse it. Due to delay of road network update, some in-field route might not be applicable. Draw the existing route manually.

  

• For project in hilly area, avoid to locate the inf-field route at the hill side with residents or water conservation site. In route scheme calculation, define these sites as prohibited areas.

  

• For project in plain area, pay attention to wide rivers and avoid to cross the river with low-level road and bridge. In route scheme calculation, define these sites as prohibited areas.

• To utilize road networks reorganized or expanded in road coverage project, if residential areas are too much, across these areas with straight line route instead of right-angled turning.

Platform Scheme Design

Pay attention to the effective relation between turbine location and turbine library (including turbine type and tower model) and complete turbine type information table.

The platform and hoist product is improved with new function of turbine hoisting design, such as main hoist recommendation. Before platform scheme calculation, complete configuration of the turbine type parameters. Generally, these parameters are loaded automatically from turbine type parameters. If some of them are empty, input them manually. The values of these parameters can be acquired from turbine manufacturor.

The platform and hoist product supports prohibited area definition and constraints on various cost zone. Define these areas and zones and select them in platform calculation. Currently, the buildings database embedded in Greenwich is available. The database for water areas, roads and hardened areas will be added in the future versions.

Design achievement: Output engineering quantity with dismantlement cost, recommended hoisting measure of each turbine location, etc. Check the details in the overview page of platform. You can export a word file on these details, but the screenshot of each turbine location needs to be captured manually.

Component exhibition and hoist risk page provides intuitive options of hoisting measure, hoist assembling space, etc. You are enabled to select or deselect various components as you wish.

• Mandatory component on platform: Nacelle and hub are selected by default. Adopt default values for foundation safety radius, hoisting area, and hoist arm length.
• Tower selection: For complex hilly areas (terrain complexity no less than 9.5), select one tower section. For project in general hilly areas and plain area (terrain complexity less than 9.5), select two tower sections.
• Blade: Do not select this option.
• Turn-around platform: Do not select this option.

Route Engineering Quantity Design

• Route longitudinal slope: For complex hilly areas (terrain complexity no less than 9.5), set up maximum longitudinal slope as 18%. For project in general hilly areas and plain area (terrain complexity less than 9.5), set up maximum longitudinal slope as 14%.
• Route cross section gradient: For complex hilly areas (terrain complexity no less than 9.5), set up backfill as 1:1.3 and excavation ratio as 1:0.25. For project in general hilly areas and plain area (terrain complexity less than 9.5), set up backfill as 1:1.5 and excavation ratio as 1:0.35.
• Engineering quantity estimation of retaining wall: For complex hilly areas (terrain complexity no less than 9.5), set up engineering quantity as 8500 m3. For project in general hilly areas (terrain complexity less than 9.5), set up engineering quantity as 6500 m3. For flat ground, set up engineering quantity as 0 m3.
• Drainage engineering quantity estimation: For complex hilly areas (terrain complexity no less than 9.5), set up engineering quantity as 350 m3. For project in general hilly areas (terrain complexity less than 9.5), set up engineering quantity as 150 m3. For flat ground, set up engineering quantity as 60 m3(add another 50m3 for project with many rivers or ponds).