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Mud-water/earth pressure dual-mode shield tunneling and its tunneling mode conversion method

A mode conversion, dual-mode technology, applied in earth-moving drilling, mining equipment, tunnels, etc., can solve problems such as unstable soil bunker pressure, and achieve the effects of preventing soil bunker pressure fluctuations, preventing pipeline blockage, and maintaining stability

Active Publication Date: 2021-07-27
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a mud-water / earth pressure dual-mode shield excavation mode conversion method, which solves the technical problem of unstable soil pressure in the shield tunneling mode conversion process in the prior art

Method used

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  • Mud-water/earth pressure dual-mode shield tunneling and its tunneling mode conversion method
  • Mud-water/earth pressure dual-mode shield tunneling and its tunneling mode conversion method
  • Mud-water/earth pressure dual-mode shield tunneling and its tunneling mode conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A mud water / earth pressure dual-mode shield, please refer to figure 1 and image 3 .

[0054] The mud water / earth pressure dual-mode shield provided in the present invention is equipped with all systems of two sets of soil pressure and mud water, and there is no need to demand and installation when mode conversion.

[0055] Specifically, such as figure 1 and image 3 As shown, the front end of the shield is provided with a cutter disk 11, and there is a tank warehouse 12 and an air conditioner 13 inside the shield, and a pipe system 2 and a helical 3 are provided. Pipeline system 2 includes a pipe, a slurry, a bypass tube, a backwashing tube, or the like for various working modes, and a flush pump, a slurry pump, and the like, and the pipe system 2 can be used in the mud water pattern, and It can also be used to implant the bentonite or foam in the earth pressure mode. When the mud water mode is trained, the soil warehouse 12 is used as a mud warehouse. The helical 3 is u...

Embodiment 2

[0059] Mode of mud water / earth pressure dual-mode shield excavation mode conversion method, please refer to Figures 1 to 7 .

[0060] In the mud water / earth pressure dual-mode shield driving mode conversion method, according to the hydrological geological conditions and the surrounding environmental factors on the construction route, the advantageous and consgument of the mud water mode is tunneling and the advantages and disadvantages of the earth pressure mode. Conversion location.

[0061] like figure 2 As shown, the mud water / earth pressure dual-mode shield of the present invention includes a conversion process that converts from the mud water mode into a soil pressure mode, specifically includes:

[0062] Step S110, when the mud mileage reaches the muddy mode to convert the soil pressure mode position, the various supporting equipment of the soil pressure mode is ready.

[0063] In this step, before the mud mileage reaches the mud water mode to convert the soil pressure...

example

[0103] See Figure 8 The subway crossing river tunnel in a city uses a shield construction, from the tunnel line of the river left bank station 43 to the right bank 43 needs to pass through the bottom of the river bed in the river 42. After the on-site analysis and geological measurement, there are many old buildings above the first line 44 and the third line of the third line, which requires precision control of the geotechnical sedimentation above, preventing the safety of the building, and has advantages in the mud water balance mode; second line road section In the stage of passing through the riverbed, the bottom of the riverbed is a full-section mudstone formation, and the mudstone is relatively stable, and the mud water balance mode is low, and the potential power equilibrium mode is high and low energy consumption.

[0104] Therefore, considering that the first line segment 44 and the third line segment 46 use the mud water mode excavation, the second line segment 45 uses t...

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Abstract

The invention discloses a mudwater / earth pressure dual-mode shield and a method for switching the excavation mode thereof. The mudwater / earth pressure dual-mode shield is equipped with devices and supporting equipment required for muddy water mode and earth pressure mode excavation, and can use muddy water and earth pressure dual mode excavation. When the mud-water mode is converted to the earth pressure mode, after closing the bypass mud pipeline and the connecting pipe, observe the pressure change of the soil tank and the air cushion tank, and then judge whether the conversion can be performed, which is conducive to ensuring the stability of the soil tank pressure during the conversion process; During the slurrying process, the slurry discharge speed can be controlled by the slurry discharge pump to match the tunneling speed of the shield machine, so that the pressure in the soil bin can be actively maintained stable. When the soil pressure mode is converted to the mud-water mode, a part of the dregs is first discharged through the screw machine. The screw machine discharges the dregs quickly, which is conducive to improving the conversion efficiency; and the reserved dregs are replaced by the backwash mode to prevent the screw When the machine discharges the remaining small amount of soil slag, gushing occurs and the pressure of the soil bin becomes unstable.

Description

Technical field [0001] The present invention relates to the field of shield construction, and more particularly to a mud water / earth pressure dual mode shield and its driving mode conversion method. Background technique [0002] Tunnels with shields are generally selected from hydrological geological conditions and surrounding environmental factors to balance their smart geological conditions and surrounding environmental factors. [0003] The mud water balanced shield is accurate in the mud waters, facing the tunnel, construction safety and sedimentation control of the poor environmental complex area or hydrological geological conditions; the disadvantage is that there are many supporting equipment, the site conditions are high, and the cost of the excavation is more Tower high. The pressure-resistant pressure control precision of the soil pressure balanced shield is slightly poor, facing tunnels, construction efficiency, and cost of low hydrological geological conditions or l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06E21D9/12E21D9/13
CPCE21D9/06E21D9/124E21D9/13
Inventor 徐敬贺左龙孟鑑先方东洋贾少东张挺浮敏
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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