Construction Structure and Methods at the Intersection of Newly Constructed Dikes and Existing Expressway Subgrade in Flood Detention Areas

By setting up anti-seepage walls and vertical shafts at the intersection of the newly built dike and the existing highway subgrade for horizontal high-pressure grouting, combined with cohesive soil backfilling and anti-seepage covering, the problem of seepage prevention at the intersection of the flood storage and detention area dike and the highway was solved, realizing the closure of the flood control system and the normal operation of the highway.

CN122128988APending Publication Date: 2026-06-02CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD
Filing Date
2026-03-24
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

At the intersection of newly constructed dikes and existing highway subgrades in flood storage and detention areas, there is a lack of effective solutions in existing technologies for how to carry out seepage prevention treatment without affecting the normal operation of the highway, meet the closure requirements of the flood control system, and ensure the continuity of flood control traffic on the top of the dike.

Method used

The project involves constructing a first anti-seepage wall below the newly built dike and a second anti-seepage wall below the existing highway subgrade. Horizontal high-pressure jet grouting is performed through vertical shafts to form a reinforced anti-seepage wall. Combined with cohesive soil backfilling and anti-seepage covering, the anti-seepage effect is ensured. Flood control roads and connecting roads are set up on the top of the dike to meet traffic needs.

Benefits of technology

It achieves effective seepage prevention without affecting highway operation, reduces project investment and social impact, maintains the continuity of flood control and traffic, avoids deformation caused by the load of newly built embankments on the highway, and meets the closure requirements of the flood control system.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122128988A_ABST
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Abstract

This invention provides a construction structure and method for the intersection of a newly constructed dike and an existing highway subgrade in a flood detention area. The construction structure, located at the intersection of the newly constructed dike and the existing highway subgrade, includes a first anti-seepage wall below the newly constructed dike and a second anti-seepage wall below the existing highway subgrade. Vertical shafts are provided at the intersections of the second anti-seepage wall and the first anti-seepage wall on both sides. The second anti-seepage wall is formed by horizontally drilling grouting holes through the two shafts and injecting grout into the existing highway subgrade and its underlying foundation. After grouting, the grouting holes are sealed, and then the interior of the shafts is backfilled in layers with cohesive soil during the grouting process. This invention provides anti-seepage treatment and seals the flood control system of the subgrade and foundation without affecting highway operation; it avoids significant deformation of the highway subgrade due to the load of the newly constructed dike or the construction of anti-seepage measures, ensuring the continuity of flood control and traffic on the dike top.
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