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A Reinforcement Method for Shield Access and Exit Holes in Ultra-deep Strata

A technology for entering and exiting holes and strata, which is applied in drilling equipment and methods, earthwork drilling, underground chambers, etc. The effect of improving stability and reliability

Active Publication Date: 2020-08-07
CHINA TIESIJU CIVIL ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used reinforcement methods for shield tunnel entry and exit are high-pressure jet spraying method and freezing method. When the ground is poor, the freezing method is often used, which has high construction difficulty, high construction cost and long construction period; in some places with relatively good ground, it is generally The high-pressure rotary grouting method is used. This method requires grouting reinforcement from the surface to the deep stratum, and requires the surface to have reinforcement construction conditions. When the buried depth of the tunnel is large, the rotary grouting method will also fail.

Method used

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  • A Reinforcement Method for Shield Access and Exit Holes in Ultra-deep Strata
  • A Reinforcement Method for Shield Access and Exit Holes in Ultra-deep Strata
  • A Reinforcement Method for Shield Access and Exit Holes in Ultra-deep Strata

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Experimental program
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Effect test

Embodiment 1

[0105] like Figure 7 As shown, when the distribution of grouting holes is relatively sparse, two drilling mechanisms are used for drilling processing, so that the drilling mechanisms are symmetrically distributed on both sides of the drum, so as to ensure the stability of the rotating mechanism during rotation, and at the same time ensure the stability of the two drilling mechanisms. The force of each drilling mechanism is uniform, so that the depth of the two grouting holes drilled each time is consistent, and the drilling efficiency is improved.

Embodiment 2

[0107] like Figure 8 As shown, when the grouting holes are closely distributed, four drilling mechanisms are used for drilling, so that the drilling mechanisms are evenly distributed around the drum, which not only improves the stability and stability of the entire drilling equipment during work. Reliability, and improve the efficiency of drilling. Compared with manual drilling, it greatly shortens the construction period, improves drilling accuracy, and prevents deviation from affecting the quality of the final grouting pipe.

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Abstract

The invention discloses a reinforcing method of ultra-deep stratum shield breaking-in and breaking-out. The reinforcing method comprises the following steps of (1) construction preparation, (2) launching shaft breaking-in opening reinforcing construction, (3) receiving shaft breaking-out opening reinforcing construction, (4) grouting construction, (5) water-proof construction and (6) drilling equipment detachment. The reinforcing method of ultra-deep stratum shield breaking-in and breaking-out is simple in steps, improves the reinforcing efficiency of breaking-in and breaking-out, simplifies steps of a machining technology, and greatly improves the reinforcing quality, the construction difficulty and cost are reduced, and the requirements of shield machining of tunnels in different depthscan be met.

Description

technical field [0001] The invention relates to a reinforcement method for an ultra-deep formation shield entry and exit hole. Background technique [0002] The process of tunnel entry and exit of shield tunneling is the key process of tunnel construction by shield tunneling method. The quality of the construction technology in this process directly affects the success or failure of shield tunneling engineering construction. Therefore, in order to ensure the safety of the shield tunnel when entering and exiting the tunnel, to prevent the soil from pouring into the shaft, to prevent water and sand inrush around the tunnel entrance, and to lift or sink when the shield tunnel enters and exits the tunnel, the tunnel must be reinforced. [0003] At present, the most commonly used reinforcement methods for shield tunnel entry and exit are high-pressure jet spraying method and freezing method. When the ground is poor, the freezing method is often used, which has high construction d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06E21D11/10E21D11/38E21B7/04E21B15/04
CPCE21B7/046E21B15/04E21D9/06E21D11/10E21D11/107E21D11/38
Inventor 陆跃梁超卜阳王圣涛张转转刘海峰赵新华车晨阳程冲李文潜邹智波高大凯张德银赵义明刚肖怀全高晨斌杜洪波邹科
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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