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Supporting device used for tunnel primary supporting structure and construction method thereof

A support device and initial support technology, which is applied in mine roof support, earth square drilling, mining equipment, etc., can solve the problems of small welding operation space, increased welding difficulty, and difficult to guarantee welding effect, so as to reduce the operation difficulty and manufacture The process is simple and easy, and the effect of using a large space to create space

Inactive Publication Date: 2017-05-24
CHINA RAILWAY ENG CONSULTING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2. When there are multiple anchor pipes on the same side of the steel arch, according to the existing scheme, the upper and lower anchor pipes need to be welded to the same section of U-shaped steel bar, because the cross-sectional area of ​​the U-shaped steel bar is small, such as the end of the anchor rod If it can be close to the steel bar, there is very little space for welding operation, which greatly increases the difficulty of welding and makes it difficult to guarantee the welding effect

Method used

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  • Supporting device used for tunnel primary supporting structure and construction method thereof
  • Supporting device used for tunnel primary supporting structure and construction method thereof
  • Supporting device used for tunnel primary supporting structure and construction method thereof

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Embodiment 1

[0047] Such as Figure 1-3 As shown, the present invention shows a support device for the primary support structure of the tunnel, which includes a steel frame 1 and at least one anchor pipe with locking feet. Preferably, there are anchor pipes 2 and anchor pipes with locking feet in this embodiment. 2', 2 in total, and the specifications of the 2 locking foot anchor pipes 2 and 2' are the same, the steel frame 1 includes the first side 3 close to the tunnel surrounding rock and away from the tunnel surrounding rock, and with the The second side 4 opposite to the first side 3, in addition, also includes a connecting plate 5, and the connecting plate 5 includes a front side 7, a rear side 6 opposite to the front side 7, an upper side 8, and the upper side 8 and the upper side 8. The opposite lower side 9, and the rear side 6 is attached to the second side 4 of the steel frame 1; in this embodiment, the locking feet are provided symmetrically along the central axis X of the conne...

Embodiment 2

[0053] Such as Figure 5-7 As shown, the difference between the second embodiment and the first embodiment is that there are two anchor pipes 2 and 2' respectively, and there are four in total. When there are four locking foot anchor pipes, and the locking foot anchor pipes 2 and 2' are arranged symmetrically along the extension direction of the central axis X, the length L' of the connecting plate is (2d+1.5mm)×2 +b, the width W' is (3.5d+3.0mm)×2+b, and the thickness is 3-7mm; wherein, the b is the width of the I-beam flange plate; preferably, the thickness can be 7mm. Other features are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0055] Figure 8 Shown is a kind of implementation method of above-mentioned support device, it is characterized in that, comprises the following steps:

[0056] S1. Prefabrication of the locking foot anchor pipe, section steel frame and connection plate; the size of the connection plate is determined according to the size of the section steel frame and the size and quantity of the locking foot anchor pipe;

[0057] S2. Fix the shaped steel frame and open the through hole on the connecting plate; or fix the shaped steel frame, open the through hole on the connecting plate, and open the through hole on the surrounding rock of the tunnel (such as drilling with a drilling rig) for fixing the fixing hole of the anchor pipe of the locking foot, and cleaning the fixing hole;

[0058] S3. Attach the connecting plate provided with the through hole to the second side of the steel frame, and align the upper side and / or lower side of the connecting plate with the second side of the stee...

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Abstract

The invention discloses a supporting device used for a tunnel primary supporting structure and a construction method thereof. The supporting device used for the tunnel primary supporting structure comprises a shape steel frame, at least one feet-lock anchor pipe and a connecting plate, and the connecting plate is fitted with the shape steel frame; one end of each feet-lock anchor pipe penetrates through the connecting plate, and is fixed in a tunnel surrounding rock. Compared with the prior art, when the anchor pipe is driven, there is no need to make the anchor pipe tightly attach to a reversed steel bar on an arch centring, and thus the difficulty of constructing the anchor pipe is reduced; a bigger welding line constructing space is provided, and the operation is convenient; the action mechanism between the feet-lock anchor pipe and the shape steel arch centring is changed, so that the connection between the feet-lock anchor pipe and the shape steel arch centring is more stable and more reliable; moreover, the production process is simple and feasible, and the demand for the technical capacity of operating personnel is low.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a support device for a primary support structure of a tunnel and a construction method thereof. Background technique [0002] When the tunnel is excavated under adverse geological conditions, if the bearing capacity of the surrounding rock is insufficient, the initial support structure will sink. At this time, the loose area of ​​the upper surrounding rock will also expand accordingly, causing the surrounding rock near the vault to collapse. The deformation and the reduction of stability will easily lead to changes in the contour of the tunnel, which will endanger the safe operation of the line. In order to prevent this phenomenon from happening, it is an effective measure in the process of tunnel construction to install locking foot anchor tubes at the arch feet of the steel arch frame of the primary support structure to increase the bearing capacity. The lock-foot anchor pip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D23/00E21D23/04
CPCE21D23/0047E21D23/0436
Inventor 彭斌赵勇倪光斌林传年魏峰吕刚陈学峰刘建友陈志广王杨于鹤然刘方张矿三张延
Owner CHINA RAILWAY ENG CONSULTING GRP CO LTD
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