Abstract
With the development of three-dimensional (3D) underground space, the jacking method of a pipe curtain box culvert has received greater attention due to its unique advantages in controlling the ground settlement. This paper proposes a new method for predicting ground settlement during box culvert jacking under the action of an ultra-shallow buried pipe curtain and then reveals the influence of jacking force and grouting rate on ground settlement. The results show that the calculation method based on stochastic medium theory and the Navier solution of the elastic sheet model can predict the ground settlement caused by volume loss of jacking and deformation of a pipe-roof. During the excavation of the passage, the deformation of the ground monitoring points is uplift, micro-uplift, and settlement. The settlement trough on a cross section is W-shaped; the closer to the cross section in the middle of the passageway, the greater the ground settlement. Moreover, when the jacking force is less than 40 kPa, the total settlement decreases with an increase in the jacking force. The scope of the W-type settlement profile is not affected by the jacking force and the grouting rate can significantly control ground settlement. Changing the grouting rate will affect the scope of the W-type settlement profile. An insufficient grouting rate will widen the gap of the ground settlement between the initial cross section, arrival cross section, and cross section in the middle of the passageway.
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The authors are very grateful for the High Speed Railway and Natural Science United Foundation of China (U1934213) and the General Program of the National Natural Science Foundation of China (51878572). We are also very grateful for the on-site data and information provided by Nanchang Urban Planning & Design Institute.
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Hao, Z., Zhang, H., Zhang, G. et al. The Prediction of Ground Settlement of a Box Culvert Jacked Under the Action of an Ultra-Shallow Buried Pipe Curtain. Arab J Sci Eng 47, 12423–12438 (2022). https://doi.org/10.1007/s13369-021-06417-6
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DOI: https://doi.org/10.1007/s13369-021-06417-6