Method for preparing a grouting material from shield muck

By preparing grout from shield tunneling to form grouting material, the problem of transporting excavated soil during shield tunneling was solved, the bonding force between the tunnel segments and the soil and the stability of the tunnel were enhanced, and the excavated soil was effectively disposed of.

CN118026629BActive Publication Date: 2026-05-01SHENZHEN HONGYEJI GEOTECHNICAL TECH CO LTD
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Patent Information

Application Number
CN202410104332.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-24
Publication Date
2026-05-01
Estimated Expiration
2044-01-24

AI Technical Summary

Technical Problem

The excavated soil generated during shield tunneling is difficult to transport directly, leading to increased economic costs for the project. Furthermore, urban dumping grounds are saturated, making it urgent to find effective disposal methods.

Method used

Grouting material is formed by preparing shield tunneling excavation soil, including main material, grouting agent and admixture, and mixed in a specific ratio. The grouting material can be injected into the gap between the tunnel segments and the soil to form a solid structure, improve the bonding force and tunnel stability, and prevent water seepage.

Benefits of technology

It enhances the bond between the tunnel segments and the soil, improves the stability of the tunnel structure, solves the problem of disposing of tunnel excavation waste, reduces transportation costs, and decreases the need for urban storage sites.

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Abstract

The present application relates to the technical field of shield muck, and discloses a preparation method of shield muck forming grouting material, which comprises main material, grouting agent and additive agent, and the proportion of the main material, the grouting agent and the additive agent is (60-90):(10-30):(0.05-0.3) according to the component mass ratio; the main material comprises mud slurry formed by shield muck and sand material; the grouting agent comprises Portland cement, sulphoaluminate cement, mineral powder, gypsum, fly ash and stone powder; and the additive agent comprises water reducing agent and retarder; the mud slurry and the sand material are firstly stirred and mixed to form the main material, then the grouting agent and the additive agent are added into the main material, and the main material, the grouting agent and the additive agent are stirred and mixed uniformly to form the grouting material. In this way, the grouting material can be injected into the pipe wall interval between the pipe segment and the soil body, a solid structure with certain strength is generated, the adhesion and stability of the pipe segment and the surrounding soil body are improved, the stability of the tunnel structure is enhanced, water infiltration is prevented, and the disposal problem of shield muck is solved.
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