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Preparation process of shield mud material for shield construction

A preparation process and shield technology, which is applied to mining equipment, filling materials, earthwork drilling and mining, etc., can solve the problems of slowing down the speed of advancement, increasing construction costs, and inconvenient travel, and achieve the effect of reducing thrust and reducing friction

Inactive Publication Date: 2021-11-09
山东盾固新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the rapid development of shield construction technology in my country, the surface settlement caused by common shield tail gaps has been greatly reduced. Ground instability is still an important cause of surface subsidence, especially at some important risk sources, which are usually avoided by slowing down the advance speed and strengthening the site, which not only delays the construction period but also increases the project cost
[0003] With the continuous development of urban underground space, it is inevitable to encounter construction routes with small turning radius in the new line design. In the construction of small turning radius, it is very important to ensure the clearance of the overcut part in order to make the shield machine turn smoothly. At present, the method of freezing the site reinforcement is usually adopted. This method not only increases the construction cost but also needs to restrict the ground traffic, causing travel inconvenience

Method used

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  • Preparation process of shield mud material for shield construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Take the following ingredients by volume ratio: 90% mixture of bentonite and montmorillonite, 10% sodium silicate aqueous solution;

[0026] 2) Adding synthetic clay minerals to the blender, and adding water whose volume is 6 times the volume of the mixture of bentonite and montmorillonite, and the blender stirs to form a mixed solution;

[0027] 3) Use the injection pump and the metering element to deliver the mixed solution into the mixer;

[0028] 4) Add an aqueous sodium silicate solution into the mixer, stir and mix to form a plastic filling, and complete the preparation of shield cement.

[0029] In summary, owing to having adopted above-mentioned method, beneficial effect of the present invention is:

[0030] 1. In the present invention, by filling the periphery of the shield body with shield solid mud, it can block the disturbance of the surrounding strata caused by the excavation vibration of the shield machine, reduce the friction with the surrounding soil...

Embodiment 2

[0034] 1) Take the following components by volume ratio: 95% of the mixture of bentonite and montmorillonite, 5% of sodium silicate aqueous solution;

[0035] 2) Adding synthetic clay minerals to the blender, and adding water with a volume 5 times the volume of the mixture of bentonite and montmorillonite, and stirring the blender to form a mixed solution;

[0036] 3) Use the injection pump and the metering element to deliver the mixed solution into the mixer;

[0037] 4) Add an aqueous sodium silicate solution into the mixer, stir and mix to form a plastic filling, and complete the preparation of shield cement.

Embodiment 3

[0039] 1) Take the following components by volume ratio: 93% of the mixture of bentonite and montmorillonite, 7% of sodium silicate aqueous solution;

[0040] 2) Adding synthetic clay minerals to the blender, and adding water whose volume is 6 times the volume of the mixture of bentonite and montmorillonite, and the blender stirs to form a mixed solution;

[0041] 3) Use the injection pump and the metering element to deliver the mixed solution into the mixer;

[0042] 4) Add an aqueous sodium silicate solution into the mixer, stir and mix to form a plastic filling, and complete the preparation of shield cement.

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Abstract

The invention discloses a preparation process of a shield mud material for shield construction, and belongs to the technical field of shield engineering materials. The preparation process comprises the following steps: 1) taking the following components in percentage by volume: 90-95% of synthetic clay mineral and 10-5% of plasticity regulator; and 2) adding the synthetic clay mineral into a stirrer, adding water of which the volume is 5-6 times of that of the synthetic clay mineral, and stirring by the stirrer to form a mixed solution. The periphery of the shield body is filled with the shield mud, disturbance of tunneling vibration of a shield tunneling machine to surrounding stratums can be blocked, friction with surrounding soil is reduced, and the effect of reducing thrust of the shield tunneling machine is achieved; in case of emergency conditions such as ground surface settlement, shield tunneling machine head planting and water gushing in shield construction, the filling shield fixing mud can be used for carrying out emergency treatment such as stratum stabilization and water stopping; and in the small turning radius construction of the shield tunneling machine, the over-excavation part can be filled through injection of shield fixing mud, it is ensured that the over-excavation part is formed, and the shield tunneling machine is assisted in turning.

Description

technical field [0001] The invention belongs to the technical field of shield engineering materials, and in particular relates to a preparation process of a shield cementing material used for shield construction. Background technique [0002] In recent years, with the rapid development of shield construction technology in my country, the surface settlement caused by common shield tail gaps has been greatly reduced. Ground instability is still an important reason for surface settlement, especially at some important risk sources, which are usually avoided by slowing down the advance speed and strengthening the site, which not only delays the construction period but also increases the project cost. [0003] With the continuous development of urban underground space, it is inevitable to encounter construction routes with small turning radius in the new line design. In the construction of small turning radius, it is very important to ensure the clearance of the overcut part in ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00E21F15/00
CPCC04B28/001E21F15/005C04B2111/00663C04B2111/00724C04B12/025
Inventor 李慧
Owner 山东盾固新材料科技有限公司