Patent ID: 8182178

Claim:
A directional fracture grouting method with polymer for seepage control of dikes and dams, comprising the steps of: (1) determining positions of permeable layers to deal with by comprehensively detecting the dike or dam using a geophysical technology, and analyzing seepage situations of the dike or dam; (2) arranging a plurality of directional fracture grouting holes at a predetermined distance along an axis of the dike or dam and at predetermined sections to construct a seepage control system; (3) forming the directional fracture grouting holes by pushing a special drilling tool, a cylindrical drill bit with two wings, into a predetermined depth of soil using a direct pushing method with hydraulic equipment, wherein a concave surface of each of the directional fracture grouting holes is provided towards an upstream of the dike or dam; (4) placing a sealing-hole grouting pipe and a fracture grouting pipe with a predetermined length, into each of the directional fracture grouting holes; and (5) injecting a polymer material comprising the steps of firstly injecting a small amount of polymer material into the sealing-hole grouting pipe to seal each of the directional splitting grouting holes; and secondly injecting a predetermined amount of material into the fracture grouting pipe, wherein the material injected is a non-water reacted two-component polymeric composition, and a two-component polymer injection system is employed, thereby, under the chemical reaction of two components of the polymer, the mixed material expands and becomes foamed solid from liquid, generating an expanding power inside the soil of the dike or dam, when the expanding force exceeds a tensile strength of soil, the soil is fractured along original splitting directions guided by the two wings of the special drilling tool, and the material forms a super-thin polymer segment, finally, the polymer segments are overlapped each other, and the seepage control system is constructed inside the dike or dam.