Construction method of fast-setting polymer grouting for rapid control of slope erosion and landslide

A construction method of fast-setting polymer grouting for rapid control of slope erosion and landslide, the construction method comprising a landslide control method and a slope erosion control method, wherein

• the landslide control method comprises the following steps:
• cleaning a diseased slope to form an operation platform;
• positioning a polymer high-pressure jet grouting pile machine with dual-channel high-pressure grouting pipes on the operation platform;
• ejecting two-component fast-setting expandable polymer slurries from two channel outlets respectively of the dual-channel high-pressure grouting pipes, and grouting the two-component fast-setting expandable polymer slurries to each of a plurality of drilled holes on the diseased slope, to cut surrounding soil mass around the drilled hole, so that the polymer slurries rapidly expand and solidify to form a polymer high-pressure jet grouting pile in each of the drilled holes, in order to compact and reinforce the soil mass;
• during the grouting, lifting the dual-channel high-pressure grouting pipes at a set speed, maintaining elevation for a set time when bottoms of the dual-channel high-pressure grouting pipes are located at a sliding surface, and then continuing to lift the dual-channel high-pressure grouting pipes;
• stopping the grouting when bottom elevations of the dual-channel high-pressure grouting pipes reach the surface elevation of the diseased slope, thereby completing construction of the polymer high-pressure jet grouting pile on the diseased slope;
• drilling a row of grouting water interception holes on a rear edge of the diseased slope, wherein two of the adjacent grouting water interception holes form a through connection;
• and
• grouting each grouting water interception hole to form an impermeable polymer water interception plate, wherein the thickness of the polymer water interception plate is consistent with a diameter of the grouting water interception holes;
• wherein the slope erosion control method comprises the following steps:
• drilling a plurality of anchor holes on the diseased slope with a twist drill on the operation platform, wherein the holes are arranged in squares;
• inserting a ground anchor into each anchor hole and performing polymer grouting to form a polymer anchorage body, wherein the grouting material is also the two-component fast-setting expandable polymer material;
• laying a steel wire gauze on the surface of the diseased slope, connecting and fixing the steel wire gauze with a tail end of each ground anchor, and arranging a plurality of spacers between the steel wire gauze and the surface of the diseased slope so that there are gaps for polymer filling between the steel wire gauze and the surface of the diseased slope;
• spraying the two-component fast-setting expandable polymer material onto the steel wire gauze to form a polymer anti-scour layer;
• drilling a plurality of planting holes on the diseased slope with a backpack drill through meshes of the steel wire gauze;
• filling each planting hole with grass seed mixed nutrient soil;
• and
• drilling a plurality of uphill drainage holes from the polymer anti-scour layer.