A method for estimating jacking force of large-size rectangular-section vertical curved pipe jacking

By using a finite element analysis model controlled by overall displacement, the problem of accuracy and efficiency in calculating the jacking force of vertical curved pipe jacking with large rectangular cross-sections was solved, and high-precision jacking force estimation was achieved.

CN116611276BActive Publication Date: 2026-06-19WUHAN INST OF TECH
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN INST OF TECH
Filing Date
2023-02-22
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technologies struggle to accurately calculate the jacking force for large-sized rectangular cross-section vertical curved pipe jacking, and existing methods are complex and computationally intensive.

Method used

A finite element analysis model with overall displacement control was adopted. By applying displacement load to the annular end face at the beginning of the pipe jacking and rotational and translational loads at the turning point, an overall displacement finite element model was established to calculate the relationship between the jacking force and the jacking distance.

Benefits of technology

It improves calculation accuracy and efficiency, enabling accurate estimation of the jacking force for vertical curved pipe jacking, simplifies the calculation process, and reduces the amount of calculation.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116611276B_ABST
    Figure CN116611276B_ABST
Patent Text Reader

Abstract

This invention provides a numerical estimation method for the jacking force of large-size rectangular cross-section vertical curved pipe jacking. By employing a global displacement-controlled finite element analysis model, the vertical curved pipe is treated as a whole to establish an overall analysis model. Different sliding friction coefficients and normal grouting pressures on the pipe section sidewalls are applied according to the jacking position to obtain the corresponding jacking force, thus realizing the function of estimating the jacking force of the vertical curved pipe jacking. Compared with the segmented displacement-controlled finite element analysis model, this invention does not require dividing the curved pipe into several segments, and eliminates the need for superposition of jacking force, side resistance, and end resistance. The mechanical connection between segments in the global displacement-controlled finite element analysis model of this invention is naturally present, while also considering the influence of pipe section rotation on the jacking force, making the calculation process simpler and significantly improving the calculation accuracy.
Need to check novelty before this filing date? Find Prior Art