Small-radius shield tunnel construction technology

A construction technology, small radius technology, applied in tunnels, mining equipment, earthwork drilling and mining, etc., can solve problems such as low deviation correction sensitivity, difficult construction, quality, safety, and even difficult progress guarantees

Inactive Publication Date: 2010-06-16
CHINA RAILWAY 16TH BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smaller the radius of the curve and the longer the shield machine, the greater the amount of deviation correction, the lower the sensitivity of deviation correction, and the more difficult it is to control the axis. The above characteristics of this project make the construction very difficult,

Method used

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  • Small-radius shield tunnel construction technology
  • Small-radius shield tunnel construction technology
  • Small-radius shield tunnel construction technology

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] 1. Application of super digging knife

[0020] See Table 1 for the calculations of the shield tail clearance, the overbreak amount of the overcut knife, and the minimum turning radius during the construction of this section.

[0021] Table 1

[0022] mark

value

Explanation of symbols

K

2

Type number of shield machine: muddy water type K=1, earth pressure type K=2

R0

200m

Tunnel Plane Turning Radius

Ds

6000mm

Segment outer diameter

Bs

1200mm

Segment Width

D

6280mm

Shield machine cutter head outer diameter

L s

4173mm

The length from the cutterhead surface of the shield machine to the hinge center

[0023] mark

value

Explanation of symbols

L b

3997mm

Body length of shield machine back (from hinge center to shield tail)

L b1

1562mm

The length from the front of the first ring segment to the hinge center

...

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PUM

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Abstract

The invention introduces a shield excavation technology of a tunnel with a sharp curve on the basis of the analysis of easy occurred problems in shield construction of a metro tunnel with a sharp curve and the combination of an engineering example of a long-distance tunnel with an extremely sharp curve between districts in a Yangjiji zoo. The development of a city promotes the development of rail transit construction. Because the selection of a rail transit line is restricted by planning, buildings and structures, the shape of the rail transit line is more and more complicated. Although the line shape of the tunnel with the sharp curve is not excellent, the line shape is applied more and more frequently. Compared with the conventional shield construction technology, the shield construction technology of the tunnel with the sharp curve has certain particularity. The research on the shield construction technology of the tunnel with the sharp curve, in particular to the shield construction technology of the tunnel with the sharp curve in complex strata in Guangzhou, has a certain reference function for similar shield construction of the tunnel with the sharp curve in the future.

Description

technical field [0001] The invention relates to a shield tunnel construction technology, in particular to a small-radius shield tunnel construction technology. Background technique [0002] In the earth pressure balance shield construction at home and abroad, the 200m turn is the smallest turn in China, and a 250m turn has been done in Japan. Such a unique small-radius shield construction project is very rare. Relevant design and construction technology research or technical achievements are also very few. The smaller the radius of the curve and the longer the shield machine, the greater the amount of deviation correction, the lower the sensitivity of deviation correction, and the more difficult it is to control the axis. The above characteristics of this project make the construction very difficult, and the quality, safety and even progress of the construction are very difficult. Even if measures are taken so that the quality, safety or progress will not be greatly affect...

Claims

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Application Information

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IPC IPC(8): E21D9/093
Inventor 赵书银阎向林章卫
Owner CHINA RAILWAY 16TH BUREAU GRP CO LTD
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