A New Calculation Method for Tunneling-Caused Stratum Settlement

Wang, Junbao; Zhou, Pengyuan; Song, Zhanping; Li, Shihao; Zhang, Qiang

doi:10.1007/s12205-022-1258-z

Cited by 14 publications

(3 citation statements)

References 43 publications

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“…With the rapid expansion of urban railways, the construction of subway tunnels has progressively revealed the evolution features of enormous burial depth, large sections, and big spans [1][2][3][4][5]. The increase in the number of large-section tunnels has also created some engineering challenges, such as surrounding rock deformation [6][7][8], support structure instability [9][10][11], and lining cracking [12][13][14], which have seriously threatened project construction and operation safety. Especially because of the complex structure, large span, and cumbersome working procedures, multi-arch tunnels are prone to large surrounding rock distortion and supporting structure instability.…”

Section: Introductionmentioning

confidence: 99%

Optimization Analysis of Partition Wall Support Scheme of Multi-Arch Tunnel

Yang,

Li,

Zhang

et al. 2024

Buildings

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With the fast progress of infrastructure projects, super-large cross-section projects are constantly emerging, and, therefore, engineering challenges and problems are increasing. Taking the triple-arch tunnel project in the turn-back line section of Santunbei Station in Urumqi Metro Line 1# as a case study, this research applied numerical simulation software Midas GTS/NX 2022 for the analysis of tunnel force and deformation in triple-arch cross-sections under different support forms of partition wall. Following the optimization of the support design of the mixed partition wall to a single straight wall, the following analytical results were obtained: surface settlement was decreased by 21.15% at the original cross-section; maximum values of principal stress and displacement of partition wall were decreased by 6.73 and 10.64%, respectively; and corresponding values for initial support structure were decreased by 21.47% and 54.74%, respectively. Meanwhile, combined with comparative analysis of engineering measurement and numerical simulation results, surface settlement and vault deformation were found to be similar to the optimized simulation results, which not only verified the reliability of simulation results but also ensured the safe and smooth construction of the project, greatly improving construction efficiency and saving construction time and cost.

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Section: Introductionmentioning

confidence: 99%

Optimization Analysis of Partition Wall Support Scheme of Multi-Arch Tunnel

Yang,

Li,

Zhang

et al. 2024

Buildings

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“…Due to the different methods of rock classification, serious communication problems arose during the tunnel project, which was designed according to Russian norms and built according to Chinese standards. Coupled with the implementation of the "Belt and Road" initiative, there will be tunnel projects designed according to Russian norms and built by China in the countries along the route (Song et al, 2019;Tian et al, 2019;Wang et al, 2022). Differences in the methods of rock classification can lead to lots of problems.…”

Section: Introductionmentioning

confidence: 99%

A quantitative assessment method for the correlation between rock mass basic quality and Protodyakonov coefficient

Ji,

Li,

Zhang

et al. 2023

Front. Earth Sci.

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With the implementation of the “Belt and Road” initiative, tunnel projects were designed in accordance with Russian design specifications and constructed by Chinese companies in countries along the route. Design companies and construction companies use different rock classification methods, which will increase the safety risk and cost of the tunnels. Therefore, it is necessary to study the correlation between Chinese engineering rock mass classification and Russian rock mass classification. The goal was to establish the correlation between rock mass basic quality (BQ) and Protodyakonov coefficient (f) for rock mass classification. Firstly, based on the equivalence principle of uniaxial compressive strength (UCS), the relationship between BQ and f containing the velocity index of rock mass (Kv) was established by comparing the relationship between f and BQ in the empirical formula of UCS. Secondly, through the equivalent principle of volumetric joint count of rock mass (Jv), we compared the empirical formula between the intactness index of Kv and rock quality designation (RQD) and conducted linear regression analysis on a large amount of data. The relationship between Kv and RQD was established. Finally, the relationship between BQ and f is quantitatively expressed and a classification table corresponding to the Russian rock classification and the Chinese engineering rock classification is obtained. The method is applied to Kyrgyzstan mountain tunnels.

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“…For the ground settlement caused by shield or pipe jacking engineering, the theoretical analysis method [3,4], empirical formula method [5][6][7][8], and numerical simulation method [9,10] are usually used to study it. In terms of shield ground settlement, Fang et al [11] proved the influence of tunnel depth and ground loss rate on longitudinal ground settlement caused by shield construction through a series of model tests.…”

Section: Introductionmentioning

confidence: 99%

Differential Analysis and Prediction Optimization of Ground Surface Settlement Induced by Quasi‐Rectangular Shield and Pipe Jacking Tunnelling

et al. 2022

Advances in Civil Engineering

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The shield method and pipe jacking method will impact the ground surface and surrounding settlement during tunnel construction. Due to their different tunnelling principles and their cross-section characteristics, the impact on the stratum is often different. To study the differences between the two construction methods on ground surface settlement, numerical simulations, Peck empirical formulas, and field measurement data were used for analysis and comparison in this work. Two correction coefficients α and λ are introduced for correction on the basis of the DOT Peck formula, and the analysis of sensitivity factors for the ground settlement for the two construction methods is carried out. The numerical simulation results show that the ground settlement induced by pipe jacking construction is smaller than that of the shield, and this simulation result is confirmed by the field measurement result. When λ is selected from 0.85 to 0.91 and α from 1 to 1.1 for the shield project, 1.2 to 1.4, and 1.4 to 1.6 for the pipe jacking project, the modified formula can better predict the ground surface settlement. According to the sensitivity factor analysis, grouting pressure and elastic modulus of grout material exert a more significant influence on pipe jacking construction. The retreat of the pipe section caused by the tunnelling pressure difference will lead to 0 mm ∼ 1.93 mm fluctuation on the ground surface.

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A New Calculation Method for Tunneling-Caused Stratum Settlement

Cited by 14 publications

References 43 publications

Optimization Analysis of Partition Wall Support Scheme of Multi-Arch Tunnel

Optimization Analysis of Partition Wall Support Scheme of Multi-Arch Tunnel

A quantitative assessment method for the correlation between rock mass basic quality and Protodyakonov coefficient

Differential Analysis and Prediction Optimization of Ground Surface Settlement Induced by Quasi‐Rectangular Shield and Pipe Jacking Tunnelling

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