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Numerical and practical investigation of the multiple hole grouting repair law of underground drainage pipeline defects
Abstract The grouting sequence and spatial layout of grouting holes are key technical problems in the treatment of underground drainage pipeline defects. An unreasonable grouting parameter design will lead to slurry running or bulging during pipeline defect repair. In this paper, based on the discrete element particle flow numerical simulation software PFC and maximum value characteristics of different shapes, a new multiple hole grouting model is established. In the multiple hole grouting model, the variation law of soil porosity and soil stress around the grouting hole was analyzed under two operating conditions of successive grouting with adjacent double holes and interhole grouting with three holes. Meanwhile, the variation law of soil porosity and stress around the grouting hole is analyzed under triangular and rectangular spatial layouts of the grouting hole. Then, the results obtained from the multiple hole grouting model are applied to an engineering site. The results show that the grouting effect in the interhole is better than that of successive grouting in adjacent holes, and the grouting effect of the triangular hole layout is better than that of the rectangular hole layout. In addition, it can be concluded that the triangular hole pattern is suitable for transverse joints or longitudinal joints.
Numerical and practical investigation of the multiple hole grouting repair law of underground drainage pipeline defects
Abstract The grouting sequence and spatial layout of grouting holes are key technical problems in the treatment of underground drainage pipeline defects. An unreasonable grouting parameter design will lead to slurry running or bulging during pipeline defect repair. In this paper, based on the discrete element particle flow numerical simulation software PFC and maximum value characteristics of different shapes, a new multiple hole grouting model is established. In the multiple hole grouting model, the variation law of soil porosity and soil stress around the grouting hole was analyzed under two operating conditions of successive grouting with adjacent double holes and interhole grouting with three holes. Meanwhile, the variation law of soil porosity and stress around the grouting hole is analyzed under triangular and rectangular spatial layouts of the grouting hole. Then, the results obtained from the multiple hole grouting model are applied to an engineering site. The results show that the grouting effect in the interhole is better than that of successive grouting in adjacent holes, and the grouting effect of the triangular hole layout is better than that of the rectangular hole layout. In addition, it can be concluded that the triangular hole pattern is suitable for transverse joints or longitudinal joints.
Numerical and practical investigation of the multiple hole grouting repair law of underground drainage pipeline defects
Du, Xueming (author) / Li, Zilong (author) / Fang, Hongyuan (author) / Wang, Shanyong (author) / Li, Bin (author) / Du, Mingrui (author) / Wang, Niannian (author) / Xue, Binghan (author) / Zhao, Xiaohua (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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