Shield cut slurry suitable for sandy water-rich stratum

A water-rich formation and mud technology, applied in mining equipment, earthwork drilling, tunnels, etc., to achieve strong water retention and stability

CN112282774AActive Publication Date: 2021-01-29CHINA RAILWAY 19TH BUREAU GRP RAIL TRANSIT ENG +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-01-29

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Abstract

The invention discloses a shield cut slurry suitable for a sandy water-rich stratum. The shield cut slurry comprises polymer slurry; the polymer slurry comprises bentonite, clay, water and a polymer;the polymer slurry is prepared from the components in parts by weight: 1 part of the bentonite, 3 parts of the clay, 6 parts of the water and 0.050-0.10 part of the polymer. Comprehensive comparison,selection and optimization are performed from the aspects of slurry viscosity, water tightness, plastic flow property and impermeability of a mixture, and other technical indexes, and the shield cut slurry suitable for the sandy water-rich stratum is formed.
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Description

technical field

[0001] The invention relates to the technical field of shield tunneling engineering in soft ground, in particular to a shield cutting mud suitable for sandy water-rich strata. Background technique

[0002] During the excavation process of the soil shield, the water-tightness and plastic flow behavior of the soil have a great influence on the excavation efficiency and economic benefits of the shield machine, and also affect the service life of the shield machine. Therefore, it is a difficult problem in shield tunneling to prevent mud from blocking the cabin, forming mud cake on the cutter head, and gushing and clogging at the screw conveyor. The success of soil improvement directly affects the shield tunneling mode, tunneling speed and tunneling cost, and even affects the success of the project.

[0003] There are four types of incision mud for shield tunneling: bentonite, bentonite plus air bubbles, bentonite plus organic acid, and polymer, which are suitabl...

Examples

Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] refer to Figure 1-Figure 8 , a shield cutting mud suitable for sandy water-rich formations, including:

[0032] Polymer mud, which includes bentonite, clay, water and macromolecule;

[0033] The components in the polymer mud are bentonite 1, clay 3, water 6 and polymer 0.050-0.10 in weight ratio.

[0034] As a specific example, first, through research, on the basis of obtaining the ratio of the incision mud of typical earth pressure shield tunnels at...