Carrier unbonded steel strand anchor cable

Abstract

The invention relates to a carrier unbonded steel strand anchor cable, and belongs to the technical field of ground anchors special for foundation engineering. The anchor cable comprises an unbonded steel strand used for being inserted into an underground drilled hole, a locking anchorage device and a carrier, wherein the locking anchorage device is attached to one end face of the carrier; the carrier extends in the longitudinal direction of the steel strand to form a long-strip-sleeve shape; the steel strand penetrates into the long-strip-sleeve, and one end of the steel strand penetrates through one end face of the carrier and then is fixedly connected with the locking anchorage device; and the length of the carrier is far larger than the diameter of the hole. According to the anchor cable, due to the fact that the outer wall of the sleeve of the carrier is bonded and fixed to surrounding cement, the anchoring force of the anchor cable can be improved, or the hole diameter of the drilled hole is reduced under the condition that the anchoring force of the anchor cable is guaranteed, and the anchor cable can adapt to complex and changeable stratum structures.

Description

technical field [0001] The invention relates to an anchor cable, in particular to an anchor cable with unbonded steel strands for a bearing body, and belongs to the technical field of ground anchors for foundation engineering. Background technique [0002] Anchor cable (anchor rod) is a commonly used anchoring component in infrastructure construction, and it is widely used, such as large buildings, subway sections, subway stations or underground garages. Anchor cables (bolt rods) are usually buried deep underground, and deep holes need to be drilled underground in advance for inserting anchor cables (bolt rods). For the unbonded steel strand anchor cables of the existing pressure-type band carrier plate, its carrier body is generally made into a plate with a thickness less than the diameter (such as figure 1 Carrier plate in 1). Such as figure 1 As shown, the pressure-bearing surface of the bearing plate 1 is generally perpendicular to the longitudinal centerline of the d...

AI Technical Summary

Problems solved by technology

The defects formed in this way are: 1. Limited by the aperture of the drilled hole 2, the pressure bearing surface 1-1 of the bearing plate 1 is difficult to expand, so the bearing stress F formed on the bearing plate 1 is limited, affecting the anchor cable 2. When the cement slurry is poured into the drilled hole 2, impurities such as soil 100 will inevitably be mixed, so for the surrounding of the bearing plate 1, especially near the bearing surface 1-1 For cement slurry, the purity may not be high, and the structure of the cement slurry mixed with 100% soil is unstable, which will lead to insufficient anchoring force for the anchor cable.

In addition, if figure 2 As shown, when encountering a complex and changeable stratum structure, it is necessary to place the bearing plate 1 and the locking anchor 4 as far as possible in the stratum with high cohesive force; however, it is difficult to control the bearing plate 1 and the locking anchor during actual construction. The position of 4 can be at the desired stratum

Images