Precise lifting method and lifting and reinforcing structure for plant equipment foundation

A precise lifting method for a plant equipment foundation, comprising the following steps:

• Step S1, forming a curtain wall:
• drilling downwards in a vertical direction at two to-be-lifted sides of the plant equipment to form a plurality of curtain holes and grouting the curtain holes, wherein the grouting area overlap each other to form two parallel curtain walls for separation from non-lifting areas;
• Step S2, forming a reinforcing body:
• drilling grouting holes inclining downwards along the outer contour of the plant equipment in a length direction of the curtain wall, wherein the grouting holes are symmetrically provided at both sides of the plant equipment;
• grouting the grouting holes to form the reinforcing body attached to a lower surface of a baseplate of the plant equipment foundation among a bottom of the baseplate and two curtain walls, so as to form a substantially inverted U-shaped structure together with two curtain walls;
• and
• Step S3, lifting:
• drilling lifting holes obliquely downwards to below a bottom of the reinforcing body and between two curtain wall, wherein the lifting holes on both sides of the plant equipment are inclined toward each other;
• and conducting pressure grouting to the bottom of the lifting holes and then a backward grouting upwards layer by layer, whereby a soil body is pressed to generate an upward lifting force as a slurry in the curtain walls is continuously increased and solidified, so as to lift the plant equipment to a set lifting height equably.