Combined structure for processing shallow soft soil roadbed in narrow field

By using a combination of solid and hollow cement-soil mixing piles in narrow spaces, combined with granular material replacement, a cement-soil solidification zone is formed, solving the problems of high cost and significant environmental impact of roadbed treatment methods in narrow spaces, and achieving economical and efficient roadbed treatment results.

CN224412228UActive Publication Date: 2026-06-26GUANGXI RAIL TRANSIT DESIGN INSTITUTE CO LTD
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Patent Information

Application Number
CN202521621207.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-31
Publication Date
2026-06-26
Estimated Expiration
2035-07-31

AI Technical Summary

Technical Problem

In narrow spaces, existing roadbed treatment methods are characterized by high costs and significant environmental impacts, especially when slope protection is not feasible. How can we minimize the impact of excavation and replacement roadbed treatment on the surrounding environment and buildings?

Method used

A combination structure of solid and hollow cement-soil mixing piles is adopted, which is combined with granular material to form a cement-soil solidification zone, serving as a retaining wall support. This reduces the excavation range for slope protection and improves soil properties, forming a composite foundation and avoiding expensive support measures.

Benefits of technology

It effectively reduces the excavation area, lowers project costs, minimizes the impact on the surrounding environment and buildings, and improves the bearing capacity and stability of the soil, resulting in good economic benefits.

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Abstract

The utility model belongs to the technical field of municipal engineering, and particularly relates to a narrow site shallow soft soil roadbed treatment combined structure which comprises a replacement filling boundary line, a roadbed replacement filling base layer, a replacement filling boundary line, a ground line, an excavation replacement filling slope line, a cement soil mixing pile solid pile, a cement soil mixing pile empty pile, a cement soil solidification area and a replacement filling granular material. Excavating a replacement filling slope line from the replacement filling boundary line and ending at the replacement filling boundary line; the solid cement-soil mixing piles are located in the lower area of the inner side of the replacement-filling boundary line road, the pile bottoms of the solid cement-soil mixing piles go deep below the replacement-filling boundary line, and the pile tops of the solid cement-soil mixing piles stop at the excavation replacement-filling slope making line; the empty pile of the cement-soil mixing pile is only used as an upward extending virtual section of the pile body of the solid pile of the cement-soil mixing pile; the cement solidification area is an area defined by the replacement filling boundary line, the pile bottom of the solid cement soil mixing pile, the excavation replacement filling slope line and the ground line. The slope excavation range can be reduced, and the influence of excavation, replacement and filling of the roadbed on the surrounding environment and buildings is reduced.
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