Ground collapse caused by shield tunneling in sandy cobble stratum and its control measures

Yao, Qiyu; Di, Honggui; Chang, Jiang; Zhou, Shunhua

doi:10.1007/s10064-020-01878-9

Cited by 31 publications

(8 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Existing studies related to collapse risk assessment mainly focus on geological and environmental indicators, such as lithology and soil type [4,5], changes in river and groundwater levels [6], quantity of rainfall [7], fault zones [8], etc. Related studies on the influence of human factors on road collapse have mainly focused on vehicle loads [9,10], underground construction [11], etc., and have insufficient attention to management factors. Moreover, research on risk assessment of urban road collapse has a high degree of concentration on risk factor selection, focusing mainly on a few specific risk factors [12] and paying insufficient attention to the coupling effect among multiple risk factors, such as evaluating the probability of occurrence about urban road collapse based on pipeline ruptures [13][14][15], soil type [16] and rainfall [17], underground structures [18], etc.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Model for Risk Assessment of Urban Road Collapse Based on China Accident Data

Zhang,

Qi,

Cheng

et al. 2024

Sustainability

View full text Add to dashboard Cite

With the deepening development and utilization of urban underground space, the risk of urban road collapse is becoming increasingly prominent, which is a serious threat to the safety of life and property. Therefore, the risk assessment of urban road collapse has vital significance for the safety management of cities. The main idea is to predict ongoing accidents by analyzing historical accident cases in depth. This paper explores the combination of Interpretative Structural Modeling (ISM) and Bayesian Networks (BNs) to construct a risk assessment model of road collapse. First, the main risk factors of road collapse and their coupling relationships are identified, which is used to increase the low reliability of complex systems. Then, the risk factors of road collapse are logically divided by ISM to obtain the BN hierarchy. Finally, the BN node probabilities are evaluated by the Expectation–Maximization (EM) algorithm using the collected 92 real road collapse accident cases. The model can be used to quantify the coupling strength and influence degree of each risk factor on the occurrence of road collapse accidents, which in turn can predict the probability of road collapse accidents in a given scenario. This study can provide a theoretical basis for urban safety management and reduce the risk of road collapse and potential loss of life and property, which is important for the sustainable development of societies.

show abstract

Section: Introductionmentioning

confidence: 99%

An Integrated Model for Risk Assessment of Urban Road Collapse Based on China Accident Data

Zhang,

Qi,

Cheng

et al. 2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…However, shield tunnelling inevitably disturbs the surrounding rocks, leading to stress redistribution within the soil [1] and inducing surface settlement [2,3]. The excessive surface settlement can damage adjacent buildings and infrastructure [4,5], jeopardizing the safety of pedestrians, vehicles, and roads [6]. This in turn can lead to work stoppages and result in additional costs [7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Surface Settlement Induced by Shield Tunnelling: Grey Relational Analysis and Numerical Simulation Study on Critical Construction Parameters

Luo,

Wang,

Wang

et al. 2023

Sustainability

View full text Add to dashboard Cite

Excessive surface settlement poses significant challenges to shield tunnelling construction, resulting in damage to adjacent buildings, infrastructure, and underground pipelines. This study focused on investigating the surface settlement induced by shield tunnelling during the construction of Qingdao Metro Line 6 between Haigang Road Station and Chaoyang Road Station. Firstly, the settlement data from the left line of the shield tunnel were evaluated by grey relational analysis. The relational coefficients were calculated to assess the correlation degrees of each influential parameter. Subsequently, the four critical influential parameters with the highest relational degrees were chosen to investigate their effects on surface settlement through numerical simulations under different scenarios. The results show that the four parameters with the highest relational degrees were thrust, grouting pressure, earth pressure, and strata elastic modulus. It should be noted that the strata elastic modulus significantly affects surface settlement, while the grouting pressure influences the settlement trough width in weak strata. Moreover, improper thrust magnitude can lead to an increase in surface settlement. Based on these findings, recommendations are proposed for the right-line tunnel construction and practical countermeasures for surface settlement during shield tunnelling construction are provided.

show abstract

“…For instance, when machines or structures are buried in different and complex environments, the state of the ground is inevitably disturbed by various engineering activities and environmental changes throughout their entire life cycle. Buried machines may move downward or upward to seek for optimal attitude during construction (e.g., a buried shield machine) [50,51]. The buried structures unexpectedly built above expansive soil, seasonal frozen soil or rock layer may undergo upward and downward movement within its service life [42].…”

Section: Introductionmentioning

confidence: 99%

Alternant active and passive trapdoor problem: from experimental investigation to mathematical modeling

Zhao

Gong

et al. 2021

Acta Geotech.

Self Cite

View full text Add to dashboard Cite

In the classical conception of the arching mechanism, the well-known trapdoor problem assumes distinctive modes (e.g., either active or passive mode) in the original geostatic overburden pressure. However, in various geotechnical applications, underground inclusions or structures may experience alternant upward and downward movements induced by construction activities or environmental changes, leading the ground to be initial loss or compaction state. If the initial disturbed state occurs, the estimation of vertical load on structures is improper based on classical trapdoor mechanism. In this study, a new conception, alternant active and passive trapdoor problem was introduced. Using a comprehensive measured system, such as particle image velocity technique and various sensors, alternant active and passive trapdoor tests were conducted to explore the mechanical behavior and kinematic mechanism of the backfill subjected to continuous loading and unloading. The development of arching with trapdoor displacement was visualized and quantified in different modes and states. Then, this problem was treated in a statical analysis based upon the visualized kinematic mechanisms. Solutions for the trapdoor load in the typical development states of arching were calculated by limit equilibrium method. Finally, two simplified ground reaction curves representing the progressive development of arching were proposed to facilitate in engineering applications. The simplified method was verified by the trapdoor test results.

show abstract

Ground collapse caused by shield tunneling in sandy cobble stratum and its control measures

Cited by 31 publications

References 34 publications

An Integrated Model for Risk Assessment of Urban Road Collapse Based on China Accident Data

An Integrated Model for Risk Assessment of Urban Road Collapse Based on China Accident Data

Analysis of Surface Settlement Induced by Shield Tunnelling: Grey Relational Analysis and Numerical Simulation Study on Critical Construction Parameters

Alternant active and passive trapdoor problem: from experimental investigation to mathematical modeling

Contact Info

Product

Resources

About