A PASSIVE ALARM TO PREVENT BURIED INFRASTRUCTURE DAMAGE

摘要

A method and apparatus are disclosed for preventing excavation damage to buried infrastructure. A plurality of excavation-sensing modules is buried near the buried infrastructure. The buried infrastructure excavation- sensing modules protect and detect buried infrastructure by emitting dense clouds of visible gas when the excavation-sensing modules are activated by impact with excavation equipment. In most instances, the visible gas will be brightly colored and it may also have a strong odor. In addition to the gas released by the modules, a loud sound may also be produced by the activated excavation-sensing module. This alerts construction crews or other workers that their excavation is nearing a protected underground structure. Once installed, no maintenance or active monitoring is required.