Insertion combination type recyclable expanding body anchor rod of high-bearing inner cabin and construction method

Abstract

The invention relates to an insertion combination type recyclable expanding body anchor rod of a high-bearing inner cabin and a construction method and belongs to the technical field of civil engineering. An unbonded steel strand is rewound through a smooth arc-shaped top bearing anchor end to form a double number of steel strands, and after forming through a specially-made steel strand locking device, the steel strands, a locking body and a binding lacing strip are commonly locked to form an insertion locking assembly, and the assembly is connected with a cabin type assembly composed of a bottom fixed pedestal and the like and is fastened through a locking screw and a nut. After the insertion combination type recyclable expanding body anchor rod of the high-bearing inner cabin is sent into a stratum, the high-pressure grouting cabin is unfolded in an expanded mode, a large-diameter high-strength anchor body is formed, and after a supporting function with high anchoring safety is finished, the unbonded steel strand can be recycled efficiently and rapidly and is simple to construct and simple in structure.

Description

technical field [0001] The invention relates to the technical service field of civil engineering, in particular to a recyclable high-load-bearing inner cabin that provides temporary support for geotechnical engineering anchoring, provides high load-bearing capacity, standardized prefabrication, fast tension speed, and high recyclability The invention discloses a body-inserted combined recyclable body-expanding bolt and a construction method. Background technique [0002] Anchorage technology is widely used in foundation pit support, slope reinforcement and other projects. Part of the prestressed anchor cable is used as a temporary support measure, and its engineering function will be completed after the anchoring project is completed. [0003] The anchor construction area is often located at the boundary of the foundation pit. The steel strands used in traditional pile-anchor support and spray anchor support often exceed the boundary line, and the anchor cables extend outwar...

AI Technical Summary

Problems solved by technology

However, the safety of anchoring and the convenience of recyclability are difficult to achieve effectively at the same time. In some key projects, projects that require a large safety factor margin, and difficult projects, such as a certain degree of slope covering In loose, locally weak, and poorly homogeneous composite media, the stability is extremely poor due to the low anchoring force per unit length of ordinary anchors. In order to improve the overall pullout force, the design length of anchors is often very long. Economic cost, the second is to increase the difficulty of construction, and the third is to produce large deformation, which increases the uncertainty of project safety

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