Telescopic tunnel steel arch frame

A technology for steel arches and tunnels, applied in the field of steel arches, can solve the problems of load release and adjustment of the surrounding rock that cannot be used, and achieve the effects of convenient operation and improved sealing.

Inactive Publication Date: 2020-08-14
NINGBO LANGDA ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the prior art is that two adjacent sections of I-beams are fixedly connected by bolts. When the surrounding rock exerts pressure on the steel arch, the steel frame in the prior art can only be passively compressed and cannot The load of the surrounding rock is actively released and adjusted

Method used

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  • Telescopic tunnel steel arch frame
  • Telescopic tunnel steel arch frame
  • Telescopic tunnel steel arch frame

Examples

Experimental program
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Embodiment 2

[0049] Embodiment 2, a telescopic tunnel steel arch frame, the difference between this embodiment and Embodiment 1 is: combining Figure 4 , the telescopic member includes a hydraulic cylinder 8 fixedly connected to the lower connection base plate 4, the output end of the hydraulic cylinder 8 is fixedly connected with a screw 80, and the screw 80 is threaded with an internally threaded pipe, and the end of the internally threaded pipe away from the hydraulic cylinder 8 is fixedly connected to the On connecting bottom plate 3.

[0050] The screw rod 80 is driven to rotate by the hydraulic oil cylinder 8, and the internally threaded tube and the screw rod 80 are relatively displaced by the screw rod 80, which is convenient for adjustment.

[0051] Working process and principle, by starting the hydraulic cylinder 8, the screw rod 80 and the inner threaded pipe can be adjusted up and down, and prestress application, deformation size control, load size control, etc. can be realized...

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PUM

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Abstract

The invention discloses a telescopic tunnel steel arch frame, which belongs to the technical field of steel arch frames in a tunnel supporting system. According to the technical scheme adopted by theinvention, the key point is that the telescopic tunnel steel arch frame comprises an upper arch frame and a lower arch frame, wherein a connecting device for connecting the upper arch frame to the lower arch frame is arranged between the upper arch frame and the lower arch frame; the connecting device comprises an upper connecting bottom plate fixedly connected onto the upper arch frame and a lower connecting bottom plate fixedly connected onto the lower arch frame; and a telescopic device is arranged between the upper connecting bottom plate and the lower connecting bottom plate. The telescopic tunnel steel arch frame has a deformation function and a load regulation function through the telescopic device.

Description

technical field [0001] The invention belongs to the technical field of steel arches in tunnel support systems, and more specifically relates to a telescopic tunnel steel arch. Background technique [0002] Steel arch frame: it is the hoop steel support in the initial support in the tunnel. It is a special hoop-shaped I-beam or other type steel, and it is also a cage-like grid steel frame made of welded rebar. After the tunnel is excavated, it is initially sprayed, hung, and erected. I-beam arches are generally used in places with poor geology such as IV and V surrounding rocks. [0003] The steel arch frame in the prior art includes multiple sections of I-beams connected by bolts, and the multiple sections of I-beams are connected to each other to form a ring. [0004] The disadvantage of the prior art is that two adjacent sections of I-beams are fixedly connected by bolts. When the surrounding rock exerts pressure on the steel arch, the steel frame in the prior art can on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/22
CPCE21D11/22
Inventor 朱汉华陈立平应国刚
Owner NINGBO LANGDA ENG TECH CO LTD
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