Patent ID: 7806631
Filing Date: 2010-10-05
Classification: E02D

Abstract:
1. A method for filling and sealing an underground opening comprising: (a) forming a hole, said hole extending through a portion of the ground and into an underground region having an open area and containing moving water; (b) inserting an elongated hollow member into said formed hole, said elongated member extending into said underground region; (c) feeding particulate aggregate into said hole whereby said aggregate flows through said hole and enters into a location in said region where moving water exists; (d) feeding a liquid water activated, expandable, hydrophobic pre-polymeric resin into said elongated hollow member whereby said resin flows through said elongated member and into a location in said region proximate to said location where said aggregate enters said moving water; (e) contacting said aggregate and said polymeric resin in said underground region in the presence of said moving water to form a coated aggregate comprising aggregate coated with an expanded, hydrophobic polymeric resinous coating in said region; and (f) then transporting said coated aggregate through movement of said water to an underground opening connected to said open area whereby said coated aggregate fills and seals said opening.