735results about How to "Improve the anchoring effect" patented technology

The present invention provides a double-sided pressure-sensitve adhesive sheet excellent in waterproof property (water stopping property) and impact resistance. The present invention relates to a double-sided pressure-sensitive adhesive sheet including a polyolefin foam substrate and an acrylic pressure-sensitive adhesive layer on both surfaces of the polyolefin foam substrate, wherein the polyolefin foam substrate has a volume percentage of closed cells of 70% or more and a degree of crosslinking of from 3 to 60 wt%, and the acrylic pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing: an acrylic polymer formed from a component including, as an essential monomer component thereof, an alkyl (meth)acrylate having a linear or branched alkyl group; and a tackifying resin.

The invention relates to a recyclable expansion anchor rod and a construction method thereof. The recyclable expansion anchor rod comprises an anchor head, a rod body, a protecting bag and a rod body protecting tube; the anchor head is composed of a screw, a herringbone expanding head, a spiral steel wire, a steel wire protecting tube and an anchoring piece; the herringbone expanding head is screwed in the screw; the spiral steel wire penetrates the herringbone expanding head to extend into the steel wire protecting tube; the steel wire protecting tube sleeves the screw; the anchoring piece is mounted at one end of the rod body; the rod body is composed of a plurality of equidistantly arranged steel strands, steel strand position fixing parts and steel strand tensioning parts, and the steel strands are respectively fixed on the anchoring piece, the steel strand position fixing parts and the steel strand tensioning parts; the protecting bag is arranged outside the anchor head; the rod body protecting tube sleeves the rod body and are in butt joint with the protecting bag. The recyclable expansion anchor rod and the construction method thereof have the advantages that simpleness in structure, convenience in mounting, repeated use and low cost are achieved and the like.

The invention discloses a self-drilling differential grouting combined anchor rod and a method for anchoring the same. The self-drilling differential grouting combined anchor rod comprises a drill bit, a grouting pipe, a spindle, an anchor head mechanism and an anchor tail mechanism. The anchor head mechanism comprises a fixed ring, a slip ring, a limit pipe and a plurality of pairs of driven connecting rods and driving connecting rods. The anchor head mechanism can be matched with fracturing grouting, so that the stability of inner anchor ends of the self-drilling differential grouting combined anchor rod can be guaranteed. The anchor tail mechanism comprises an anchor disc, a connecting cap, a spring and a nut; the grouting pipe and the spindle can deform in a coordinated manner by the aid of the connecting cap, joint bearing effects can be realized by the grouting pipe and the spindle, and the self-drilling differential grouting combined anchor rod can be timely in driving support states by the aid of the spring and can be in the driving support states for a long term. The self-drilling differential grouting combined anchor rod has the advantages that drilling, inner anchor end reaming and fracturing grouting can be carried out on weak broken surrounding rock by the aid of the self-drilling differential grouting combined anchor rod, and permeation grouting can be carried out on remaining sections by the aid of the self-drilling differential grouting combined anchor rod; the surrounding rock in small ranges around the grouting pipe can be anchored by the grouting pipe in a full-length anchoring mode; squeezing reinforcing effects can be realized by the spindle for the surrounding rock in large ranges including anchoring regions of the grouting pipe, the anchoring regions of the grouting pipe and anchoring regions of the spindle act with one another, the synergistic bearing effects can be realized by the grouting pipe and the spindle, and accordingly support effects can be improved.