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Self-expanding foot locking anchor pipe

A lock-foot anchor pipe and self-expanding technology, which is applied in the installation of anchor rods, wellbore linings, tunnel linings, etc., can solve problems such as early excavation and early support of tunnels, unclear force transmission effects, and air quality impacts. Achieve the effect of low installation technical threshold, improved installation tolerance and pre-tightening, and fast construction

Pending Publication Date: 2019-02-12
CHINA RAILWAY 12TH BUREAU GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical construction method has a long period of time and often requires the cooperation of multiple types of work, which does not meet the design concept of early excavation and early support of the tunnel.
At the same time, the use of welding will have an impact on the air quality in the tunnel
At the same time, the current use of mechanically fixed anchors with locking feet has the disadvantages of difficult positioning and unclear force transmission effect

Method used

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  • Self-expanding foot locking anchor pipe
  • Self-expanding foot locking anchor pipe
  • Self-expanding foot locking anchor pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1-5 The shown self-expanding locking foot anchor tube, a self-expanding locking foot anchor tube, is characterized in that it includes:

[0037] anchor pipe 1;

[0038] The storage bag 2, the storage bag 2 is in contact with the anchor tube 1;

[0039] The storage bag breaking mechanism is used to break the storage bag 2 .

[0040] In actual use, according to the design dimensions of different anchor pipes 1, a hole slightly larger than the diameter of the anchor pipe is drilled on the surrounding rock by wind or water, and a storage bag is installed on the prefabricated anchor pipe with a storage bag damage mechanism. After the storage bag is installed, insert the self-expanding anchor tube into the formed hole, use the storage bag damage mechanism to break the storage bag 2, stimulate the self-expanding concrete to mix with the expansion activator, and fix the locking tube on the surrounding rock In the drill hole, the anchor pipe is fixedly connect...

Embodiment 2

[0043] Such as Figure 1-5 The self-expanding locking foot anchor tube shown is different from the first embodiment in that: the outer wall of the anchor tube 1 is covered with a storage bag 2; between the storage bag 2 and the anchor tube 1 is The storage bag damage mechanism, the end of the anchor tube 1 is provided with a storage bag damage mechanism driver.

[0044] Preferably, the storage bag damage mechanism is a cutting piece 8, and the cutting piece 8 is fixedly connected on the outer wall of the anchor pipe 1; the described cutting pieces 8 are in multiple groups, and each cutting piece 8 is evenly spaced and fixedly connected to the outer wall of the anchor pipe 1 Above; the sheet-like lower bottom edge of the cut sheet 8 is fixedly connected with the outer wall of the anchor pipe 1, the sheet-shaped upper bottom edge of the cut sheet 8 is a blunt edge, the two sides of the cut sheet 8 are sharp edges, and the cut sheet 8 The ratio of the thickness to the diameter o...

Embodiment 3

[0049] Such as Figure 1-5 The self-expanding locking foot anchor pipe shown is different from the second embodiment in that: the screw part is a threaded sleeve 4; one end of the threaded sleeve 4 is connected to the other end of the first threaded rod 3 One end is connected through a matching thread; the other end of the threaded sleeve 4 is connected with one end of the second threaded rod 5 through a matching thread, and the other end of the second threaded rod 5 is fixedly connected with one end of the connecting rod 9 through a universal joint 6 , the other end of the connecting rod 9 is connected with an arch fixed connection end plate 7; the arch fixed connection end plate 7 is a rectangular steel plate; four corners of the rectangular arch fixed connection end plate 7 are provided with bolts connected vias.

[0050] In actual use, after the prefabricated anchor pipe with the storage bag damage mechanism and the surrounding rock are fixed and installed, the arch frame...

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Abstract

The invention belongs to the technical field of tunnel engineering, and relates to a self-expanding foot locking anchor pipe. The self-expanding foot locking anchor pipe is composed of an anchor pipebody, an anchor frame fixing connecting end, a universal joint, a nipple threaded sleeve, a hollow anchor pipe and a self-expanding concrete and expanding activator storage capsule, wherein the hollowanchor pipe is provided with a protective sleeve and a small piece. The self-expanding foot locking anchor pipe has simple installation, only the mechanical connection with a steel arch without welding can solve problems, the air pollution in a tunnel is effectively reduced, and the construction progress is speeded up. According to the self-expanding foot locking anchor pipe, the installation fault tolerance and pre-tightness can be improved through a self-tightening nipple and the universal joint, and positioning is simple, and the force transmission effect is clear. The modularization of adevice is completed through pre-placing expansion concrete and activating expansion materials in a factory, and rapid construction is carried out while the grouting pressure is ensured. The installation process only needs simple machining, a single type of work can complete the whole installation, and the installation technology threshold is low.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a self-expanding locking foot anchor pipe. Background technique [0002] The locking foot anchor pipe is the key part that plays a temporary supporting role in the initial support of the tunnel and controls the deformation of the lining structure during the construction period of the weak surrounding rock. Generally, a temporary inverted arch is set at the lower end of the arch. [0003] At present, the existing lock-foot anchor pipe manufacturing technology is to first air-drill to form a hole; then there are two methods in the process, one of which is: put anchoring agent in the drill hole, insert the lock-foot anchor pipe into the anchoring agent in the drilled hole, and then weld the lock-foot anchor tube to the arch frame; another way is: insert the lock-foot anchor tube with holes into the drill hole, then high-pressure grouting, and then weld the lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/02E21D21/00E21D11/18
CPCE21D11/18E21D20/021E21D20/023E21D20/028E21D21/00
Inventor 陈明常帅斌谢卓吾李剑波刘江涛常帅军吴伟迪周林春魏伟
Owner CHINA RAILWAY 12TH BUREAU GRP
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