Multiple anti-corrosive controllable expansion extrusion soil anchor and construction method

Abstract

Multiple anti-corrosive controllable expansion extrusion soil anchor, including anchorage segment, free-tensioned segment, outer anchor, grouting pipe, at least one power transmission member and more than one loading plates, the anchorage segment includes controllable expansion extrusion soil apparatus for geotechnical engineering use, which includes upper sleeve components, lower sleeve components and expansion extrusion barrel which is filled of cement-based slurry or cement-based slurry containing expansion agent inside. The construction method of the multiple anti-corrosive controllable expansion extrusion soil anchor includes inject the cement-based slurry or cement-based slurry containing expansion agent into the expansion extrusion barrel of deep anchor hole. The objective is to provide a multiple anti-corrosive controllable expansion extrusion soil anchor and construction method which is suitable for complicated, flaccidity, corrosivity stratum, being capable of repressing anchorage slurry loss and controlling expansion size of anchorage segment, high bearing capacity, good durability, low cost.

Description

technical field [0001] The invention relates to a bolt used in rock-soil anchoring engineering in the field of civil engineering and a construction method. Background technique [0002] In the technical fields of slope, embankment, foundation pit, tunnel and underground cavern anchoring engineering in the field of geotechnical engineering, as well as in the technical fields of anti-floating of buildings and anti-lifting of structure foundations, it is usually necessary to use permanent system anchor bolts, or use Anti-floating anchors and other technical means are used to anchor and reinforce various buildings and structures. The basic requirements for permanent soil anchors are durability and bearing capacity. Anchor rods or anchor piles made by traditional tensile, shear or pullout anchoring techniques are used in strata with complex engineering geological conditions, such as loose geological bodies, high groundwater head, and high hydrodynamic pressure. Under the conditi...

AI Technical Summary

Problems solved by technology

This technology can provide double or multiple anti-corrosion protection for bolts with small drilling depth, single steel bar as reinforcement, and low anchoring force. However, for weak formations and high steep slopes that require high locking force anchoring, this The technology needs to drill a large number of anchor holes with a large depth, and the casing must be connected multiple times to meet the durability protection requirements of the entire length of the anchor rod, thus greatly increasing the difficulty and cost of construction

In addition, there are still some problems in the protection of the anchoring head of the anchor rod in this patent application. In the environment of corrosive soil and water body, the durability of the anchoring head part of the anchor rod is difficult to be effectively guaranteed

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