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Mud concentration type shield tunneling construction method for shield tunneling machine

A shield machine, mud thickening technology, applied in wellbore lining, tunnel lining, underground chambers, etc., can solve problems such as the inability to maintain the stability of the excavation surface, the instability and collapse of the excavation surface, and the increase in engineering costs. , to achieve the effect of eliminating harmful gas hazards, improving construction accuracy and reducing costs

Inactive Publication Date: 2015-06-10
江苏锐成机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when most sections of the shield section are fine-grained soil strata and there are local coarse sand and gravel strata with high permeability, the section with high permeability of the earth pressure balance shield cannot well maintain the stability of the excavation surface , it is easy to cause accidents such as the instability and collapse of the excavation surface and the ground subsidence
If the muddy water pressurized shield is used in the whole section because of the highly permeable stratum in some sections, the project cost will increase significantly

Method used

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  • Mud concentration type shield tunneling construction method for shield tunneling machine

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Embodiment 1

[0028] A mud-thick propulsion method for a shield machine, comprising the following steps:

[0029] 1) Adding powdered clay and tackifier 2 to the mud generating and processing system 1 to prepare thick mud, the powdered clay and tackifier are stirred and mixed to make thick mud with a slump of 18;

[0030] The components of the tackifier include: disodium silicate (CAS No. 15457-97-3), carboxymethyl calcium cellulose (CAS No. 9050-04-8), cross-linked acrylic polymer and sodium salt, wherein : the mass percentage of disodium silicate is 5%, the mass percentage of carboxymethyl calcium cellulose is 3%, the mass percentage of cross-linked acrylic polymer is 2%, the mass percentage of sodium salt is 2.5%; the rest is Water, the specific gravity of the prepared thick mud is 1.3~1.5.

[0031] 2) Make plasticizer A agent and plasticizer B agent in plasticizer generation and processing system 3, and make 100L N solvent with the water of plasticizer A agent 23kg and 82kg; Plasticizer...

Embodiment 2

[0041] A mud-thick propulsion method for a shield machine, comprising the following steps:

[0042] 1) Adding powdered clay and tackifier 2 to the mud generating and processing system 1 to prepare thick mud, the powdered clay and tackifier are stirred and mixed to make thick mud with a slump of 22;

[0043] The components of the tackifier include: disodium silicate (CAS No. 15457-97-3), carboxymethyl calcium cellulose (CAS No. 9050-04-8), cross-linked acrylic polymer and sodium salt, wherein : The mass percentage of disodium silicate is 8%, the mass percentage of carboxymethyl calcium cellulose is 5%, the mass percentage of cross-linked acrylic polymer is 2.5%, the mass percentage of sodium salt is 2.5%; the rest is Water, the specific gravity of the prepared thick mud is 1.3~1.5.

[0044] 2) Make plasticizer A agent and plasticizer B agent in plasticizer generation and processing system 3, and make 100L N solvent with the water of plasticizer A agent 27kg and 85kg; Plasticiz...

Embodiment 3

[0054] A mud-thick propulsion method for a shield machine, comprising the following steps:

[0055] 1) Adding powdered clay and tackifier 2 to the mud generating and processing system 1 to prepare thick mud, the powdered clay and tackifier are stirred and mixed to make thick mud with a slump of 20;

[0056] The components of the tackifier include: disodium silicate (CAS No. 15457-97-3), carboxymethyl calcium cellulose (CAS No. 9050-04-8), cross-linked acrylic polymer and sodium salt, wherein : the mass percentage of disodium silicate is 6%, the mass percentage of carboxymethyl calcium cellulose is 4%, the mass percentage of cross-linked acrylic polymer is 2.2%, the mass percentage of sodium salt is 2.5%; the rest is Water, the specific gravity of the prepared thick mud is 1.3~1.5.

[0057] 2) Make plasticizer A agent and plasticizer B agent in plasticizer generation and processing system 3, and make 100L N solvent with the water of plasticizer A agent 25kg and 83kg; Plasticiz...

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Abstract

The invention relates to a mud concentration type shield tunneling construction method for a shield tunneling machine. According to the method, an excavating surface and an over-excavation part are pressurized and filled with thick mud to form a mud film layer, so that the accidents of surface subsidence, upheaval and the like can be completely eliminated, construction accuracy is well improved, and the cost is reduced; a plasticizer is added, and a lubricating layer is maintained, so that long-distance tunneling, sharp curve tunneling and rock stratum tunneling are facilitated; working shafts are reduced, working efficiency is improved, and the cost of a construction period is reduced; a vacuum mud discharging manner is adopted, so that low workload and high safety are achieved, forced ventilation in a tunnel can be driven, and harmful gas hazards such as gas in the tunnel can be completely eliminated.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular to a mud-thick propulsion method of a shield machine. Background technique [0002] At present, most urban tunnel construction in my country adopts earth pressure balance shield tunnel construction. This method is more suitable for strata dominated by fine particles, with low water permeability and easy to form plastic flow state after disturbance. It can also be about 30% cheaper than the cost. However, when most sections of the shield section are fine-grained soil strata and there are local coarse sand and gravel strata with high permeability, the section with high permeability of the earth pressure balance shield cannot well maintain the stability of the excavation surface , It is easy to cause accidents such as the instability and collapse of the excavation surface and surface subsidence. If the muddy water pressurized shield is used in the whole section because of the highly per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08E21D11/10C04B28/00
CPCE21D9/08E21D11/105
Inventor 谈海强
Owner 江苏锐成机械有限公司
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