摘要:
A rock bolt includes an elongate metallic body having a first end and an opposed second end, a threaded portion at the second end, for attaching thereto and locating thereon, a nut and a bearing plate, a mechanical anchor at, or at least partially located on, a first end portion of the body and a first resistive anchor, located between the threaded portion and the mechanical anchor.
摘要:
The disclosure relates to a device for reinforcing a ground on which is disposed a loading structure. Threaded inclusions are disposed vertically within the ground and reinforce said ground. The core diameter of threaded inclusions is between 250 mm and 450 mm and the external diameter is between 350 mm and 600 mm. A load transmitting layer is interposed between the ground and the loading structure disposed thereon, so as to transmit and distribute the load from the loading structure to both the ground and the plurality of inclusions. A ratio between a distance between axes of two adjacent inclusions and the internal diameter of said adjacent inclusions is between 4 and 14, and the inclusions are made from a material having a specified 28-day compressive strength between 5 MPa and 35 MPa.
摘要:
A method for anchoring a device in multilayer soil includes analyzing the soil to determine the depth, hardness and density of at least two layers of soils. The anchoring device is prepared for positioning by attaching a self-drilling bit to a bottom end of a hollow rod, attaching a drilling disc to the rod at a position above the self-drilling bit, attaching at least one helical disc to the rod above the drilling disc, and attaching a positioning plate to the rod at a distance from the drilling disc such that the distance from the bottom of the drilling disc to the bottom of the positioning plate is approximately equal to the depth of a first layer of soil. The anchoring device is drilled into the soil until the drilling disc rests on top of the second layer and the positioning plate rests on top of the first layer.
摘要:
An attachment element (1;51), includes a boring head (5), a hollow cylindrical receiving body (2; 53) having, at its end (4) facing in a setting direction (S) of the attachment element (1; 51), a recess for receiving the boring head (5) and at its opposite end (6), an engagement element (7), the attachment element further having at least one outlet opening (10.1; 10.2) through which a mortar mass located in the receiving body (2; 53) is squeezed out under a pressure applied by a piston (27), a channel section (29) extending between the mortar mass and the at least one outlet opening (10.1; 10.2), and an inner tube (21; 52) arranged in the receiving body (2; 53) at a predetermined distance from an inner wall of the receiving body (2; 53) for forming at least one suction channel (22; 42.1; 42.2) and in which the mortar mass and the channel section (29) are arranged.
摘要:
A drilling and anchoring device comprises a drilling pipe (8), a drilling tool (12) mounted at the end of the pipe, and one or several cables (4) and/or other anchoring reinforcements. The cables and/or other anchoring reinforcements are so attached to the drilling tool that the drilling tool remains in a grout body (7) formed by cement injection in the ground surrounding a drilling hole (6).
摘要:
A drilling and anchoring device comprises a drilling pipe (8), a drilling tool (12) mounted at the end of the pipe, and one or several cables (4) and/or other anchoring reinforcements. The cables and/or other anchoring reinforcements are so attached to the drilling tool that the drilling tool remains in a grout body (7) formed by cement injection in the ground surrounding a drilling hole (6).
摘要:
A rock bolt comprising a bolt body, a bag member directly surrounding an outer periphery of the bolt body adjacent to one end thereof, retainer means from securely fixing the bag member direct to the bolt body, a first tube means for feeding packing material into the bag member and extending through the bag member and toward the other end of the bolt body. The packing material filled into the bag member acts to lid or plug the hole into which the rock bolt has been inserted.
摘要:
A method of anchoring an anchor bolt in a bore hole in which a fast-setting agent and cement mortar are introduced into the bore hole, which comprises the steps of filling the bore hole completely with cement mortar and introducing simultaneously with the cement mortar a container of a fast-setting agent in the end of said bore hole, and crushing the vessel by the insertion of an anchor bolt.