Hole sealing method for geological exploration borehole of shield tunnel

A technology for geological exploration and shield tunneling, which is used in earth-moving drilling, sealing/isolation, wellbore/well components, etc. The single plugging structure and other problems can achieve the effect of increased interaction, low cost and simple construction process.

Active Publication Date: 2018-11-06
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two are mainly aimed at the plugging of underwater exploration holes, which consume more cement slurry, the plugging structure is relatively simple, the side friction resistance and the bearing capacity of the formation are not fully utilized, and the calculation model of plugging is not clear enough

Method used

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  • Hole sealing method for geological exploration borehole of shield tunnel
  • Hole sealing method for geological exploration borehole of shield tunnel
  • Hole sealing method for geological exploration borehole of shield tunnel

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] see Figure 1-Figure 4 , a method for sealing a shield tunnel geological exploration borehole, comprising the steps of:

[0047] S1: Backfilling of the lower part of the exploration borehole;

[0048] The specific process of step S1 is as follows: use the bagged shield tunneling waste muck as the lower sealing material to seal the hole, and the bagged shield tunneling waste muck 2 is filled to a height of 1m above the shield machine.

[0049] S2: Construction of the spiral pile body 1 in the middle of the exploration borehole to cooperate with the exploration borehole helically;

[0050] The screw pile body 1 is composed of an upper pile body 4 and a lower pile body 5 connected in sequence, the lower pile body 5 is a threaded drill pipe screwed in the exploration borehole so that the inner wall of the exploration borehole forms a threa...

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Abstract

The invention discloses a hole sealing method for a geological exploration borehole of a shield tunnel. The hole sealing method for the geological exploration borehole of the shield tunnel includes the steps that S1, backfilling of the lower portion of the exploration borehole is carried out; S2, a spiral pile body matched with the geological exploration borehole in a spiral mode is constructed inthe middle portion of the geological exploration borehole; and S3, backfilling of the upper portion of the exploration borehole is carried out. According to the hole sealing method for the geologicalexploration borehole of the shield tunnel, by adopting a spiral pile body structure for the first time, the sealing of the exploration borehole is realized. The spiral pile body is matched with the geological exploration borehole in a spiral mode, so that the interaction between the pile body and a ground layer and the pile body bearing capacity are increased. The whole hole sealing method has the advantages of simple process, energy saving and environmental protection, and has high feasibility, economy and popularization value.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a hole sealing method for geological exploration boreholes of shield tunnels. Background technique [0002] Shield machine is a commonly used machine in subway construction. Its basic principle is to maintain its stability by applying a certain pressure to the excavation surface. According to the different ways of applying pressure, it can be divided into mud-water type shield machine and earth pressure balance type. Shield, etc., and generally set the pressure above 2bar. Before shield excavation, detailed geological exploration along the line is required, but after geological exploration, the hole sealing treatment is often the weak link. At present, the method of backfilling with clay balls and cement slurry is mostly used, but due to the shrinkage of the orifice, the actual effect is often not good. [0003] When the shield is excavated to the borehole,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 王海波王树英胡钦鑫张细宝曾凡轩杨鹏阳军生刘朋飞傅金阳
Owner CENT SOUTH UNIV
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