Most power transmission lines are overhead because the heat they generate can cause multiple problems if they are placed underground. However, advances in cable design and manufacturing, the use of plastics for insulation, and other factors have made underground placement of high-voltage transmission lines a viable option in many situations. Thermal grout is used to transmit heat from underground electrical cables into the surrounding soil or rock, said Guy Dickes, president, Constellation Group LLC, who over the past five years has been responsible for planning and executing grouting for major underground power transmission projects, including the Wolf Bay underwater crossing.
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机译：大多数输电线架空，因为它们产生的热量如果放置在地下会引起多种问题。但是，电缆设计和制造的进步，绝缘塑料的使用以及其他因素使得在许多情况下地下放置高压传输线成为可行的选择。 Constellation Group LLC总裁Guy Dickes表示，热灌浆用于将热量从地下电缆传输到周围的土壤或岩石中，在过去的五年中，他负责规划和执行大型地下输电项目的灌浆，包括狼湾水下渡口。
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