Stand column and decompression dewatering well structure

By adopting a column and reduced pressure precipitation well structure in foundation pit engineering and using well pipes and fill structures for support and stopping water, the problems of separate design and installation of precipitation wells and columns in the prior art are solved, and construction safety and efficiency are improved.

CN222632303UActive Publication Date: 2025-03-18SHANGHAI CHANGKAI GEOTECHN ENG
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Patent Information

Application Number
CN202420609062.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-27
Publication Date
2025-03-18
Estimated Expiration
2034-03-27

AI Technical Summary

Technical Problem

In existing foundation pit projects, the precipitation wells and columns need to be designed and installed separately, resulting in large project volume, large investment in equipment and materials, long construction period, high cost, and the columns are prone to deformation, affecting construction safety.

Method used

The column and reduced pressure precipitation well structure is adopted, and a filling structure is provided between the well pipe and the well hole wall, including a filter material layer, a clay ball layer and a grouting layer to achieve water stop and reinforcement, avoid deformation and leakage.

Benefits of technology

Effectively realize precipitation and support functions, improve construction safety, reduce project volume and construction period, reduce construction costs, and inhibit column uplifts.

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Abstract

The utility model belongs to the technical field of building and municipal construction, and particularly discloses a stand column and pressure reduction dewatering well structure which comprises a well casing and a filling structure arranged between the well casing and the wall of a well hole. The well pipe is a single pipe or a group pipe formed by attaching the outer walls of a plurality of single pipes, and each single pipe comprises a main pipe section and a filtering pipe section which is located below the main pipe section and provided with filtering holes in the peripheral wall. The filling structure comprises a filter material layer, a clay ball layer and a grouting layer from bottom to top, and the filter material layer is not lower than the top end of the filter pipe section. The structure can be used as a dewatering well and a stand column, deformation, leakage and upheaval do not occur easily, the construction safety is effectively improved, the work amount is reduced, the construction period is shortened, and the manufacturing cost is saved.
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