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Sand gushing and water gushing prevention freezing pipe drill rod pulling-out device and drill rod pulling-out process for subway tunnel construction

A technology for tunnel construction and water freezing, which is used in earth-moving drilling, wellbore/well components, sealing/sealing, etc. It can solve the problems of sand gushing and water, affecting the smooth progress of construction, etc., so as to improve construction efficiency and ensure sealing. sexual effect

Active Publication Date: 2021-08-20
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, before the PVC pipe is used as a frozen pipe, it is often necessary to drill holes in advance with a drill pipe, and after the drilling is completed, the drill pipe needs to be pulled out, and it is relatively easy to cause sand and water in the process of pulling out the drill pipe. The problem of smooth progress of construction, especially when encountering sandy soil layers, will seriously affect the smooth progress of construction

Method used

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  • Sand gushing and water gushing prevention freezing pipe drill rod pulling-out device and drill rod pulling-out process for subway tunnel construction
  • Sand gushing and water gushing prevention freezing pipe drill rod pulling-out device and drill rod pulling-out process for subway tunnel construction
  • Sand gushing and water gushing prevention freezing pipe drill rod pulling-out device and drill rod pulling-out process for subway tunnel construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Drill pipe removal device for anti-sand gushing and water freezing pipe drilling in subway tunnel construction, such as Figure 4 and Figure 5 As shown, including sealing mechanism 3, pulling rod mechanism and driving mechanism;

[0041] The sealing mechanism 3 includes a rubber plug 14 and a flange 15. There are two flanges 15. The rubber plug 14 is fixedly installed between the two flanges 15. The rubber plug 14 and the flange 15 are fixedly installed together to form a flange rubber seal. The diameter of the flange 15 matches the inner diameter of the drill pipe 1 to be removed so that the flange 15 fits with the inner wall of the drill pipe 1 to be removed; the flange rubber seal is fixedly installed at the mouth of the drill pipe 1 to be removed , and the sealing fit between the inner wall of the drill pipe 1 to be removed; the outer end face of the flange rubber seal is movably connected with the hydraulic cylinder 4 of the rod pulling mechanism; the flange rubb...

Embodiment 2

[0048] Drill pipe removal device for anti-sand gushing and water freezing pipe drilling in subway tunnel construction, such as Figure 6 As shown, including sealing mechanism 3, pulling rod mechanism and driving mechanism;

[0049] The sealing mechanism 3 includes a rubber plug 14 and a flange 15. There are two flanges 15. The rubber plug 14 is fixedly installed between the two flanges 15. The rubber plug 14 and the flange 15 are fixedly installed together to form a flange rubber seal. The diameter of the flange 15 matches the inner diameter of the drill pipe 1 to be removed so that the flange 15 matches the inner wall clearance of the drill pipe 1 to be removed; the flange rubber seal is fixedly installed at the mouth of the drill pipe 1 to be removed, and Sealing cooperation with the inner wall of the drill pipe 1 to be removed; the outer end surface of the flange rubber seal is vertically connected with the support rod 11 of the rod pulling mechanism;

[0050] The pull-out...

Embodiment 3

[0055] The drilling pipe removal process for preventing sand gushing and water freezing in subway tunnel construction includes the following steps:

[0056] Step A: the drilling is completed; the length of each section of the drill pipe used is 1.5 meters, and the drill pipe and the drill bit 9 are connected by threads 20, see figure 1 ;

[0057] Step B: After the drilling is completed, extend the unloading screw 22 and fix it relatively through the slot 21, rotate the unloading screw 22, unscrew the drill bit 9 and the drill pipe 1 to be removed, and disconnect the thread 20, see figure 2 ;

[0058] Step C: Insert the free tube 2 into the inner cavity of the drill pipe and extend into the bottom of the drill hole, see image 3 ;

[0059] Step D: use the subway tunnel construction anti-sand escaping water freezing tube drill pipe removal device of embodiment 2 to remove the drill pipe 1 to be removed from the borehole, see Figure 6 ;

[0060] Step E: Immediately install...

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Abstract

The invention discloses a sand gushing and water gushing prevention freezing pipe drill rod pulling-out device and a drill rod pulling-out process for subway tunnel construction. The device comprises a sealing mechanism, a rod pulling mechanism and a driving mechanism; the rod pulling mechanism comprises a supporting part and a rod pulling part; the sealing mechanism is fixedly mounted at the pipe orifice of a drill rod to be pulled out, and a pulling-free pipe is sealed in the drill rod to be pulled out; and the first end of the rod pulling part of the rod pulling mechanism is fixedly connected with the drill rod to be pulled out, the second end of the rod pulling part of the rod pulling mechanism is in driving connection with the driving mechanism, the driving mechanism reciprocates in the pulling-out direction of the drill rod to be pulled out, and the maximum distance of reciprocating motion is larger than or equal to the length of a single drill rod of the drill rod to be pulled out. By arranging the sealing mechanism, sand gushing and water gushing possibly occurring in the drill rod to be pulled out, the pulling-free pipe and a gap between the drill rod to be pulled out and the pulling-free pipe can be sealed, and construction hazards caused by sand gushing and water gushing are avoided; and by arranging the driving mechanism and the pipe pulling mechanism, the drill rod can be efficiently and rapidly pulled out of a drill hole, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of drill pipe extraction. Specifically, it relates to a drill pipe removal device and a drill pipe removal process for preventing sand gushing and water freezing in subway tunnel construction. Background technique [0002] The shield method is a commonly used construction method in the construction of urban subway tunnels. When the shield machine enters and exits the tunnel, in order to prevent soil collapse caused by insufficient soil strength at the entrance, soil pouring into the well, and sand and water around the entrance, etc. In the event of the accident, the reinforcement of the soil around the portal has become an important link in the shield construction process of the subway tunnel. The freezing method is widely used in coal mines and other projects, and its construction technology is becoming more and more mature, and has been gradually applied to the soil reinforcement around the portal of shie...

Claims

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Application Information

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IPC IPC(8): E21B23/00E21B33/03
CPCE21B23/00E21B33/03
Inventor 孔令辉李方政高伟王磊许舒荣李宁韩玉福丁航张洪波孙佳
Owner BEIJING CHINA COAL MINE ENG CO LTD
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