Analysis and Application of Critical Pressure Prediction Model for Surface Leakage of Underwater Shallow Buried Jacking-Pipe Grouting
Year: 2025
Type: article
Abstract: Jacking-pipe construction has the advantages of high mechanization, small environmental impact, fast construction speed, etc. It is widely used in the project of underground pipeline under the river. However, jacking-pipe grouting under shallow burial conditions is prone to surface slurry problems. Based on the jacking-pipe project of Meichong Lake in Changfeng County, Hefei, this paper discussed the mechanism of grouting surface leakage, and defined the relationship between the critical pressure of jacking-pipe grouting and the ultimate pressure of shear damage of mud jacket. Mechanical model of surface leakage from shallow buried jacking-pipe grouting was established. A general mathematical expression for the grouting critical pressure was derived and a sensitivity analysis was performed. A numerical model was established based on the background engineering, and multiple sets of grouting pressure conditions for simulation and analysis were set up. The results show that the cohesive force c, the angle of internal friction φ, and the overburden thickness hs are all approximately linearly and positively correlated with the critical pressure of grouting. When the grouting pressure is less than 197.54 kPa the surface settlement increases. When this value is exceeded the surface displacement changes from settlement to uplift and the risk of slurry bubbling increases significantly. The theoretical calculation matches the value of grouting critical pressure from numerical simulation. The actual grouting pressure in the project is lower than the theoretical grouting critical pressure value and no slurry bubbling occurs during construction, which has verified the reliability of the theoretical model. This study can provide theoretical basis and investigation ideas for the setting of reasonable grouting pressure in similar projects.
Source: Buildings
Authors: Ziguang Zhang, Yong He, Xiaopeng Li, Xiang Li, Lin Wei, Feifei Chen
Institution: Anhui Jianzhu University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W4412096742