Application of foam concrete in pit backfill of subway station

Because of the complexity of foundation construction in subway station, meanwhile, with the development of high-rise buildings and underground space, crowded buildings, complex pipeline and narrow spaces set a higher demand of technology to pit backfill of subway station.
Traditional handicraft backfill is easy to cause the uncompacted backfill or collapse of slope, the serious influence driving safety, the service life of the subway. Foam concrete of lightweight and high strength, because of self-compacting ability, is a good way to solve the above problems. At the same time, the foam concrete can effectively reduce the settlement and cavity caused by groundwater.
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