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A hydraulically expanded and recovered soil-squeezing bolt

A hydraulic and soil anchor technology, applied in the direction of bolt installation, earthwork drilling, construction, etc., can solve the problems of inability to increase, economic waste, slow construction progress, etc., to reduce the impact, reduce the length, and increase the anchoring force.

Inactive Publication Date: 2019-02-26
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of pre-hole grouting bolt has the following three disadvantages: First, under the given geological conditions, the increase of the anchoring force can only be increased by increasing parameters such as the diameter and length of the bolt, and the increase of these parameters has led to Huge economic waste, sometimes increasing the length of the anchor rod is also limited by the surrounding space; second, after the anchoring task is completed, the tie bars and grouting stones of the anchor rod are all kept in the underground soil for the later development and utilization of the surrounding underground space. The third is that the anchoring force can only be formed after the grouting construction of the anchor rod is completed and the grouted stone body reaches a certain strength, resulting in a slow construction progress, and once the construction of the anchor rod is completed, the anchoring force cannot be increased. In the case of dangerous situations such as shifting trend, if measures can be taken to increase the anchoring force of the bolt, it is entirely possible to avoid further instability of the slope

Method used

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  • A hydraulically expanded and recovered soil-squeezing bolt
  • A hydraulically expanded and recovered soil-squeezing bolt
  • A hydraulically expanded and recovered soil-squeezing bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 (the hydraulic oil cylinder is a two-way piston radial setting type): as figure 1As shown, a hydraulically expanded and recovered soil-extruding bolt includes a radial expansion device 10, an elastic sleeve 20, a connecting steel bar 30 and an anchoring device 40, and the connecting steel bar 30 is formed by connecting two steel bars with a sleeve. One end of connecting steel bar 30 is fixed outside the soil layer by anchoring device 40, and described anchoring device 40 is made up of anchoring plate 41 and anchorage 42, and anchoring device 42 is crown beam or fence usually, and the other end of described connecting steel bar 30 is connected with The elastic sleeve 20 is fixedly connected, and the radial expansion device 10 is arranged radially inside the elastic sleeve 20. The radial expansion device 10 includes a plurality of hydraulic cylinders 11, a plurality of connecting rods 12, oil pipes 13 and oil pressure Table 14, the elastic sleeve 20 is formed...

Embodiment 2

[0040] Embodiment 2 (hydraulic oil cylinder is one-way piston radial setting type): as Figure 4 As shown, a hydraulically expanded and recovered soil-extruding bolt includes a radial expansion device 10, an elastic sleeve 20, a connecting steel bar 30 and an anchoring device 40, and the connecting steel bar 30 is formed by connecting two steel bars with a sleeve. One end of connecting steel bar 30 is fixed outside the soil layer by anchoring device 40, and described anchoring device 40 is made up of anchoring plate 41 and anchorage 42, and anchoring device 42 is crown beam or fence usually, and the other end of described connecting steel bar 30 is connected with The elastic sleeve 20 is fixedly connected, and the radial expansion device 10 is arranged radially inside the elastic sleeve 20. The radial expansion device 10 includes a plurality of hydraulic cylinders 11, oil pipes 13 and oil pressure gauges 14. The elastic The sleeve 20 is formed by bending two steel sheets 21. T...

Embodiment 3

[0042] Embodiment three (hydraulic oil cylinder is one-way piston radial setting type): as Figure 7 As shown, a hydraulically expanded and recovered soil-extruding bolt includes a radial expansion device 10, an elastic sleeve 20, a connecting steel bar 30 and an anchoring device 40, and the connecting steel bar 30 is formed by connecting two steel bars with a sleeve. One end of connecting steel bar 30 is fixed outside the soil layer by anchoring device 40, and described anchoring device 40 is made up of anchoring plate 41 and anchorage 42, and anchoring device 42 is crown beam or fence usually, and the other end of described connecting steel bar 30 is connected with The elastic sleeve 20 is fixedly connected, and the radial expansion device 10 is arranged radially inside the elastic sleeve 20. The radial expansion device 10 includes a plurality of hydraulic cylinders 11, a plurality of connecting rods 12, oil pipes 13 and oil pressure Table 14, the elastic sleeve 20 is formed...

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PUM

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Abstract

The invention discloses a hydraulic expansion recovery type soil squeezing bolt. The hydraulic expansion recovery type soil squeezing bolt is characterized by comprising a plurality of radial expansion devices, an elastic sleeve, a connecting steel bar and an anchoring device, wherein one end of the connecting steel bar is connected with the anchoring device arranged on the earth surface, and the other end of the connecting steel bar is fixedly connected with one end of the elastic sleeve; the radial expansion devices are arranged in the elastic sleeve in the axial direction; each radial expansion device comprises a piston rod, a hydraulic oil cylinder abutting against the inner wall of the elastic sleeve, an oil pipe connected with the hydraulic oil cylinder and a hydraulic source connected with the oil pipe. The hydraulic expansion recovery type soil squeezing bolt has the advantages that the hydraulic oil cylinders act on different positions of the elastic sleeve, the contact areas of the elastic sleeve and anchor hole walls are increased, and the bearing capacity of the bolt can be remarkably improved.

Description

technical field [0001] The invention relates to a hydraulic expansion recovery type soil squeezing bolt, which is used for the protection, reinforcement and rescue work of soil or soft soil slopes in building foundation pit support engineering, and belongs to the technical field of roadway support. Background technique [0002] Bolt support is a reinforcement and support method used in surface engineering such as slopes, deep foundation pits of rock and soil, and underground chambers such as tunnels and stopes. It is made of metal parts, wood parts, polymers or other materials. To form a column, drive into the surface rock mass or the pre-drilled hole in the rock mass around the chamber, use the special manufacturing of the head, the rod body and the tail support plate, or rely on the bonding effect to combine the surrounding rock and the stable rock mass Together, they produce suspension effects, composite beam effects, and reinforcement effects to achieve the purpose of su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/74E02D17/04E02D17/20E21D21/00
CPCE02D5/74E02D17/04E02D17/20E21D21/00
Inventor 杨学祥杨语驿胡银仇顺华
Owner YANGTZE UNIVERSITY