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A measurement and management method for muddy water shield slag discharge

A management method and technology of mud-water shield, which are applied in measuring devices, weighing, earthwork drilling and mining, etc., can solve the problems of excessive slag volume, ground subsidence, stratum cavity, etc., to ensure safety, high stability, simple method effect

Active Publication Date: 2021-11-12
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the mud-water balance shield tunneling, maintaining the dynamic balance of the incoming and outgoing slurry, and matching the excavation speed with the proportion of the incoming and outgoing slurry are the prerequisites to ensure smooth excavation. The large fluctuations in cutter head torque and excavation speed are likely to make it difficult to control the amount of slurry output during the excavation process. If the balance between the amount of slag output cannot be accurately and timely controlled, the amount of slag output during excavation will exceed the square to form a stratum cavity, which will then cause ground subsidence or cause safety risks such as damage to surrounding buildings and underground pipelines. The present invention proposes A muddy water shield slag discharge measurement management method, which solves the problem of how to scientifically and reasonably control slag discharge during the excavation process

Method used

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  • A measurement and management method for muddy water shield slag discharge
  • A measurement and management method for muddy water shield slag discharge
  • A measurement and management method for muddy water shield slag discharge

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Embodiment 1

[0068] Embodiment 1: A method for measuring and managing the slag discharge volume of mud-water shield tunneling. The slag discharge of mud-water shield tunneling refers to the use of a slag-carrying machine with a certain specific gravity and good slag-carrying ability under the condition that the slurry entering and exiting is in a state of dynamic balance and the face of the tunnel is kept in balance. The slurry enters the slurry tank and is rotated and stirred by the cutter head to form a slurry with a large specific gravity, and the surrounding rock cut off by the cutter head is carried out of the warehouse through the slurry outlet pipe to realize the excavation process; when the mud-water balance shield is excavated, the dynamics of the slurry entering and exiting are maintained. The balance and the matching of the excavation speed and the proportion of the incoming and outgoing slurry are the prerequisites to ensure the smooth excavation of the shield machine.

[0069] ...

Embodiment 2

[0081] Embodiment 2: A method for measuring and managing the slag discharge quality of a muddy water shield. The difference between this embodiment and Embodiment 1 is that by calculating and comparing the theoretical slag discharge amount and the actual slag discharge amount, the slurry inlet pipe and the slurry discharge pipe Adjust and correct the specific gravity and propulsion speed to make the shield machine reach the ideal tunneling state.

[0082] S1, such as figure 1 As shown, the control system calculates the mass M of muck output by the shield machine per second based on the first volumetric flowmeter and the first density meter out, according to the second volume flowmeter and the second density meter to calculate the mass M of the input muck per second of the shield machine in ;

[0083] The shield machine outputs the mass of muck per second M out The calculation formula is:

[0084]

[0085] In the formula, V' d Indicates the output sludge volume of the s...

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Abstract

The invention discloses a muddy water shield slag discharge measurement management method. The second density meter calculates the input muck mass of the shield machine; the total muck mass M of the actual excavated soil within the time of excavating a pipe ring is obtained by the output muck mass and the input muck mass sd , the mass of muck in the actual excavated total soil mass M sd and theoretical excavation soil mass M target Compare, if M sd <M target , it is judged that the shield machine is in an under-excavation state, if M sd > M target , it is judged that the shield machine is in an over-excavation state. The present invention can determine whether there is over-under-excavation during the tunneling process of the shield machine through the calculation and comparison of the total slag mass of the actual excavated soil and the mass of the theoretical excavated soil, and guides the shield machine driver to adjust the construction excavation parameters in time.

Description

technical field [0001] The invention belongs to the technical field of muddy water shield slag discharge management, and in particular relates to a muddy water shield slag discharge measurement and management method. Background technique [0002] The mud-water balanced shield is to install a closed partition on the rear side of the cutterhead of the mechanical shield, and the space between the partition and the cutterhead is a muddy water tank. The muddy water made by mixing water, clay and its additives is pressed into the muddy water tank through the conveying pipeline, and the muddy water pressure chamber is formed after the muddy water fills the whole muddy water tank and has a certain pressure. Through the pressurization of muddy water and the pressure maintaining mechanism, the stability of the excavation face can be maintained. When the shield machine is advancing, the soil and sand cut by the rotary cutter head are stirred by the stirring device to form high-concent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06E21D9/13G01G19/52
CPCE21D9/06E21D9/13G01G19/52
Inventor 林福龙路亚缇贺开伟张鹏董科徐淼刘鑫鑫华翔张发亮胡鹏丁红军
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD