Calculation Methods for the Jacking Force of a Rectangular Pipe Jacking Tunnel: Overview and Prospects

The jacking force in the construction process of rectangular pipe jacking tunnels is characterized by its intermittent, discontinuous, and unstable nature. This force not only determines the speed of tunneling but also controls the rate at which soil stress is released, leading to deformation of the formation and land subsidence, thereby impacting the surrounding environment. To accurately calculate and predict the jacking force of rectangular pipe jacking tunnels, this study conducts a comprehensive investigation and analysis of relevant literature on the calculation methods employed both domestically and internationally. The calculation methods are categorized into four types: experimental analysis methods, numerical simulation methods, theoretical formula methods, and empirical formula methods. The research content of each of these methods is analyzed and organized, and the existing research is summarized in terms of its problems and shortcomings. Furthermore, suggestions for future research on the calculation method of the jacking force are proposed, aiming to provide a technical reference for the theoretical research and engineering practice of calculating and predicting the jacking force of rectangular pipe jacking tunnels.