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Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction

A double-circle shield and tunnel construction technology, which is applied to tunnels, earth square drilling, mining equipment, etc., can solve problems such as blind operations, achieve simple and practical correction methods, and reduce adverse effects

Inactive Publication Date: 2006-03-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is no means of prediction before the actual construction operation, so that the operation is in a blind state

Method used

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  • Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction
  • Deviation correcting pressure weight method for side rolling in double circle shield tunnel construction

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: Weight correction under the condition of small deflection angle (0.25 degrees)

[0024] Embodiment Take the construction of the double-circle shield tunnel in the tenth bid section of Shanghai Metro Line 6 as an example. According to the structure and soil conditions of the double-circle shield machine, the load required by the double-circle shield machine when the given deflection angle returns to zero is calculated by applying the finite element method. The relationship between the corresponding deflection angle correction load (kN) is as follows :

[0025] A deflection angle of 0.1° requires a deflection load of 92kN; a deflection angle of 0.2° requires a deflection load of 168kN; a deflection angle of 0.3° requires a deflection load of 230kN; a deflection angle of 0.4° requires a deflection load of 290kN; a deflection angle of 0.5° requires a deflection load of 345kN; A deflection angle of 0.6 degrees requires a correcting load of 395 kN; a deflection an...

Embodiment 2

[0027] Embodiment 2: Weight correction under the condition of large deflection angle (0.5 degrees)

[0028] In the construction of the tenth section of Shanghai Metro Line 6, when the deflection angle is relatively large, such as 0.5 degrees. According to the formation conditions in Shanghai, the ballast correction load calculated by the finite element method is 345kN. At this time, 345 / 2=173 pieces of lead are needed. But in fact, the free space of the shield machine is limited, and only about 100 lead blocks can be placed. Only the method of partial weight correction can be used. At this time, the weight is 200kN. figure 2 It is the weight correction process curve at 0.5° deflection angle calculated by applying the method of finite element numerical analysis. It can be seen from this that the 200kN ballast can make the double-circle shield rotate 0.25 degrees. The other deflection angle of 0.25 degrees is solved according to the method of controlling the rotation angle ...

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Abstract

The deviation correcting pressure weight method for side rolling in double circle shield tunnel construction used in tunnel construction engineering technology includes the following steps: 1. calculating the pressure weight lead block size in finite element method based on the construction of tunnel shield machine, soil condition and the deviation angle; 2. designing the shape of the lead blocks as cuboids with weight of 200 kg and 1.38x0.13x0.1 m3 size; 3. selecting the lead block setting positions; and 4. eliminating rest deviation angle in available technology in the case of relatively great deviation angle. The method of the present invention is simple and practical, can greatly reduce the negative effect on the peripheral environment, and is suitable for different kinds of double circle shield tunnel construction.

Description

technical field [0001] The invention relates to a construction method in the technical field of tunnel engineering, in particular to a method for rectifying the deviation of ballast by lateral rolling in the construction of a double-circle shield tunnel. Background technique [0002] Double circular shield tunneling (DOT) method tunnel has become one of the construction methods in subway construction and municipal engineering tunnel construction because it can save underground space resources, reduce the impact on ground structures, and reduce project cost. However, during the construction of the shield machine, the phenomenon of lateral rolling deflection (hereinafter referred to as rolling) will inevitably occur, that is, the section of the shield machine is deflected to one side by an angle α. The double-circle shield tunnel has two axes, and the transverse dimension is significantly increased. Rolling and deflection of the lining segment will directly affect the assembly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00
Inventor 沈水龙蔡丰锡
Owner SHANGHAI JIAO TONG UNIV
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