A device and method for anchoring and supporting soil with vortex compression and expansion of fine stone concrete

Abstract

The invention belongs to the field of geotechnical engineering, and particularly relates to a device and method for extruding and expanding fine aggregate concrete anchoring supporting soil through vortex pressure. The device for extruding and expanding the fine aggregate concrete anchoring supporting soil through vortex pressure comprises a steel anchor pipe, a rotary gear and a vortex pressure blade. The rotary gear is installed on the top of the steel anchor pipe, and the vortex pressure blade is installed inside an opening of the steel anchor pipe. The device has the advantages that construction is easy, the construction period is short, the manufacturing cost is low, the steel anchor pipe with a vortex pressure cavity can effectively ensure that fine aggregate concrete is extruded and expanded in the direction perpendicular to the steel anchor pipe, the effects of compaction, cementation and water drainage are achieved at the same time, the strength in the longitudinal and horizontal directions of the soil can be greatly improved, and anchoring force is strengthened. According to the method for extruding and expanding the fine aggregate concrete anchoring supporting soil through vortex pressure, multi-layer soil extrusion and expansion can be achieved by increasing the number of vortex pressure cavities, and a plurality of diameter expanding portions are formed. The device and method for extruding and expanding the fine aggregate concrete anchoring supporting soil through vortex pressure are applicable to various kinds of viscidity and sand soil.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and in particular relates to a device and method for anchoring and supporting soil with vortex-pressed and expanded fine stone concrete. Background technique [0002] At present, anchor support is a reinforcement support method used in surface engineering such as slopes, deep foundation pits of rock and soil, and underground chamber construction such as tunnels and stopes. The existing anchoring types are: pipe seam anchor, self-drilling screw anchor, inverted wedge metal anchor, spin resin anchor, spin grouting anchor, and spin grouting anchor. However, all kinds of anchors have their own disadvantages, such as self-tapping screw-in anchors. The installation of self-tapping screw-in anchors requires precise drilling and proper coordination of various parameters, which is difficult to meet the requirements during construction; and self-tapping extrusion is selected. Anchor bolts require a...

AI Technical Summary

Problems solved by technology

However, all kinds of anchors have their own disadvantages, such as self-tapping screw-in anchors. The installation of self-tapping screw-in anchors requires precise drilling and proper coordination of various parameters, which is difficult to meet the requirements during construction; and self-tapping extrusion is selected. Anchor bolts require a large torque for drilling rigs, and their adaptability is limited. In some cases, the unit anchoring force is small. The anchorage of self-drilling anchor bolts depends entirely on post-anchor grouting. It is difficult for grouting to reach saturation for upward holes.

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