Dynamic stability evaluation of underground cavern sidewalls against flexural toppling considering excavation-induced damage

Li, Ang; Dai, Feng; Liu, Yi; Du, Hongbo; Jiang, Ruisong

doi:10.1016/j.tust.2021.103903

Cited by 88 publications

(33 citation statements)

References 44 publications

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“…To describe the two-stage damage evolution characteristics, a model distinguished from the conventional damage model is proposed from energy dissipation. Generally, some mechanical parameters, such as strain, stress, and elastic modulus are used to establish a fatigue damage constitutive equation [35][36][37][38]. The drawback of this method is that the stress and strain information is relatively simple and not well reflects the internal damage of rock.…”

Section: Discussionmentioning

confidence: 99%

Research on Fracture and Energy Evolution of Rock Containing Natural Fractures under Cyclic Loading Condition

Li¹,

Wang

Shuo

et al. 2021

Geofluids

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For rock engineering in cold regions, the naturally fractured rock is susceptible to repeated freeze-thaw (F-T) weathering, coupled fatigue conditions of freeze-thaw (F-T), and stress disturbance act on rock mass, which can lead to the instability of rock engineering and even occurrence of geological hazards. Knowledge of how natural fracture affects the overall fracture evolution of freeze-thawed rock is crucial to rock mass stability. Laboratory multilevel cyclic loading tests are conducted to reveal the fatigue behavior and energy evolution for naturally fractured marble, as well as the influence of natural fracture volume on fracture evolution. The test results show that the preexisting natural fracture impacts fatigue strength, lifetime, and energy dissipation. The dissipated energy is correlated to all kinds of natural fracture (i.e., opening-mode, closing-mode, and filling-mode), and it decreases with the increase of the total natural fracture volume. The dissipated energy presents a first slow and then faster pattern as the cycle number grows. Compared with newly formed cracks, the proportion of energy consumed by stimulating natural cracks is smaller.

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Section: Discussionmentioning

confidence: 99%

Research on Fracture and Energy Evolution of Rock Containing Natural Fractures under Cyclic Loading Condition

Li¹,

Wang

Shuo

et al. 2021

Geofluids

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“…All of the above studies are based on the traditional double-row pile support structure, and there is less research on the optimization and improvement of the traditional support structure [11][12][13][14][15][16]. It is also short of comparison of mechanical properties for supporting structures and some in situ studying [17][18][19][20][21]. Double-row pile supporting structure is used in mining engineering and geotechnical engineering [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Research on the Mechanical Properties of New Double‐Row Pile Supporting Structure Based on an In Situ Study

Zhou

Liu²,

Wang³

2021

Shock and Vibration

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According to the force characteristics of the double-row pile supporting structure, two new types of double-row piles are developed: the prestressed strong-constrained double-row piles and the recycling assembled double-row piles. A comparative field test was conducted on the support effects of the two new double-row piles and conventional double-row piles. The test site is located in a deep foundation pit of the Beijing Daxing International Airport Project. The feasibility and reliability of the two new support structures are verified. Field monitoring included section strain and bending moment of the pile body, horizontal displacement of the pile body, and vertical and horizontal displacement of the pile top. The research shows that because of the prestressed anchorage cables in the rear row piles, the prestressed strong-constrained support structure can provide better tensile performance from the rear piles, and the deformation and displacement are minimal. The recycling assembled double-row piles have similar deformation and displacement to the conventional piles. Through the connection of the steel members, the construction time can be effectively shortened. After the backfill of the foundation pit, the steel members can be recycled and the cost can be reduced.

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“…As an effective means to study rock mechanics, numerical simulation has been widely used in various fields of rock mechanics. At the same time, relying on the effective analysis of the field data to obtain the relevant physical and mechanical model is also essential for the research [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Prediction and Evaluation of Rockburst Based on Depth Neural Network

Zhang

Wang

2021

Advances in Civil Engineering

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The formation mechanism of rockburst is complex, and its prediction has always been a difficult problem in engineering. According to the tunnel engineering data, a three-dimensional discrete element numerical model is established to analyze the initial stress characteristics of the tunnel. A neural network model for rockburst prediction is established. Uniaxial compressive strength, uniaxial tensile strength, maximum principal stress, and rock elastic energy are selected as input parameters for rockburst prediction. Training through existing data. The neural network model shows that the rockburst risk is closely related to the maximum principal stress. Based on the division of rockburst risk areas, according to different rockburst levels, the corresponding treatment methods are put forward to avoid the occurrence of rockburst disaster. Based on the field measured data and test data, combined with the existing rockburst situation, numerical simulation and neural network method are used to predict the rock burst classification, which is of great significance for the early and late construction safety of the tunnel.

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Dynamic stability evaluation of underground cavern sidewalls against flexural toppling considering excavation-induced damage

Cited by 88 publications

References 44 publications

Research on Fracture and Energy Evolution of Rock Containing Natural Fractures under Cyclic Loading Condition

Research on Fracture and Energy Evolution of Rock Containing Natural Fractures under Cyclic Loading Condition

Research on the Mechanical Properties of New Double‐Row Pile Supporting Structure Based on an In Situ Study

Prediction and Evaluation of Rockburst Based on Depth Neural Network

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