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A recyclable hydraulic umbrella-shaped soil-squeezing bolt

An umbrella-shaped, soil-anchored technology, applied in construction, sheet pile walls, foundation structure engineering, etc., can solve problems such as insufficient bearing capacity, inapplicability, and difficulty in underground space development, so as to improve anchorage force and pullout resistance of anchor rods The effect of power, development and convenience

Inactive Publication Date: 2017-12-29
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Anchor bolts are widely used in the field of building foundation pit support, and the most commonly used anchor bolts are preformed hole grouting bolts, but they generally have the following four disadvantages: ①The bearing capacity is not enough; The anchoring force can only be exerted after the age is reached, which is not suitable for short construction period and slope emergency projects; ③The non-recoverability of pre-holed grouting anchors also brings difficulties to the development of underground space in the later stage

Method used

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  • A recyclable hydraulic umbrella-shaped soil-squeezing bolt
  • A recyclable hydraulic umbrella-shaped soil-squeezing bolt
  • A recyclable hydraulic umbrella-shaped soil-squeezing bolt

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A retrievable hydraulic umbrella-shaped soil-extruding bolt, comprising a pull rod 1 arranged coaxially and sequentially connected, an anchor section 2, and a hydraulic cylinder 3, the anchor section 2 includes a propulsion mechanism 21, a steel sheet 22, and the propulsion mechanism 21 The two ends of the two ends are respectively connected with the pull rod 1 and the piston rod 31 of the hydraulic cylinder 3 that provides the power of the propulsion mechanism 21 to reciprocate in the axial direction. A group of steel sheets 22 are arranged along the circumference of the propulsion mechanism 21. The back-and-forth movement of the propulsion mechanism 21 spreads out in the outer peripheral direction to contact the anchor hole wall or gathers in the inner peripheral direction to separate from the anchor hole wall. When the propulsion mechanism 21 moves toward the anchor hole orifice, the steel sheet 22 is pushed to expand toward the outer peripheral direction, so that the...

Embodiment 2

[0029] A retrievable hydraulic umbrella-shaped soil-extruding bolt, comprising a pull rod 1 arranged coaxially and sequentially connected, an anchor section 2, and a hydraulic cylinder 3, the anchor section 2 includes a propulsion mechanism 21, a steel sheet 22, and the propulsion mechanism 21 The two ends of the two ends are respectively connected with the pull rod 1 and the piston rod 31 of the hydraulic cylinder 3 that provides the power of the propulsion mechanism 21 to reciprocate in the axial direction. A group of steel sheets 22 are arranged along the circumference of the propulsion mechanism 21. The back-and-forth movement of the propulsion mechanism 21 spreads out in the outer peripheral direction to contact the anchor hole wall or gathers in the inner peripheral direction to separate from the anchor hole wall. When the propulsion mechanism 21 moves toward the anchor hole orifice, the steel sheet 22 is pushed to expand toward the outer peripheral direction, so that the...

Embodiment 3

[0035] This embodiment is basically the same as Embodiment 1, and its structure is basically the same, as Figure 4 As shown, the difference is that: the oil cylinder 3 adopts a through-hole oil cylinder, and the types of oil cylinders used are different, and in this embodiment, the steel rod 4 is one, which passes through the center of the through-hole oil cylinder and is fixed to the bottom of the cylinder body 32. . Its use method and beneficial effect are basically consistent with Embodiment 1.

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Abstract

The invention provides a recyclable hydraulic umbrella-shaped soil-squeezing anchor rod. The recyclable hydraulic umbrella-shaped soil-squeezing anchor rod comprises a drawbar (1), an anchoring section (2) and an oil cylinder (3) which are coaxially arranged and are sequentially connected, wherein the anchoring section (2) comprises a feed mechanism (21) and steel sheets (22); the two ends of the feed mechanism (21) are separately connected to the drawbar (1) and a piston rod (31) of the oil cylinder (3) for providing power of enabling the feed mechanism (21) to move back and forth axially; one group of steel sheets (22) is arranged along the circumferential ring of the feed mechanism (21); and the steel sheets (22) are strutted in a peripheral direction along with back and forth movement of the feed mechanism (21) so as to be in contact with the hole wall of an anchor hole or are gathered together in an inner peripheral direction so as to be separated from the hole wall of the anchor hole. The anchor rod can be used for quickly bearing, is strong in bearing capacity, is strong in pulling resistance and anchoring force, is recyclable, and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of building foundation pits and temporary slope support and reinforcement, and in particular relates to a recoverable hydraulically extruded soil anchor. Background technique [0002] In the process of underground engineering, mining engineering, foundation pit and slope engineering involved in geotechnical engineering, in order to prevent the formation from deforming, collapsing or destabilizing and endangering safety, a main support technology for strengthening the formation is to use bolts. The formation is strengthened by the high-strength tensile capacity of the bolt installed in the formation and the dense combination between the bolt and the grouting body around the anchor and the formation, so as to improve the integrity of the formation and control the formation. deformation, so that it reaches a stable and safe state. The development of this technology has a history of hundreds of years, and a var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/74
CPCE02D5/74E02D2600/30
Inventor 杨学祥胡银
Owner YANGTZE UNIVERSITY