Method and apparatus for preparation of soil materials
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Narrow trench upright or inclined sidewall has sliding shuttering panels retaining concrete during installation of sub-surface public utilities
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Excavation spoil and demolition rubble are recycled as uniform aggregates by milling between rotating breaking surfaces maintained at a speed differential to produce slippage and create surface charge on particles
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Self-consolidating filler and its use
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Flexible sheeting used in pipeline installation, comprises of segments assembled together and arranged for supporting sidewalls of narrow ditch filled with liquid while pipelines are parallelly laid into narrow ditch
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Shaft structure, for access to a buried channel system, has an inspection cover for the underground channel with a mechanism to flag an indicator at the shaft opening and indicate its actual setting where the shaft cover is replaced
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Drainage duct has one piece construction with concrete duct and impregnated quartz sand coating of gully
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Process for laying pipe and media lines in narrow trenches comprises sinking a pipe or media line in the trench without touching the bottom of the trench, and fixing with liquid mortar or filling composition
