The effect of arching pressure on a vertical circular shaft

Kim, Kyoung Yul; Lee, Dae Soo; Cho, Jaeyeon; Jeong, Sang Seom; Lee, Sungjune

doi:10.1016/j.tust.2013.03.001

Cited by 43 publications

(16 citation statements)

References 14 publications

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“…Tan and Wang (2013) compared a 100-m-wide×25.89-m-deep unpropped (self-supported) cylindrical excavation with 11 other cylindrical excavations, 92 building basement excavations, and eight metro station excavations in Shanghai soft clay deposits, and demonstrated that self-supported cylindrical excavations had much stronger capabilities of resisting deformation. The lateral earth pressure acting on a vertical circular shaft considering arching effect is also much smaller than that calculated by Rankine theory (Kim 2013). A famous example of anchorage engineering using circular excavation is the Akashi-Kaikyo bridge west anchorage (Furuya et al 1994).…”

Section: Introductionmentioning

confidence: 92%

Mechanical Behaviors of Cylindrical Retaining Structures in Ultra-Deep Excavations

Xu¹,

Hu²,

Wang³

et al. 2015

Innovative Materials and Design for Sustainable Transportation Infrastructure

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Cylindrical shafts have been widely used in practice with prominent structural superiorities, primarily because of the spatial arching effects resulting from their circular retaining structures. The behaviors of cylindrical shafts were investigated via three-dimensional finite element analyses of two circular excavations for anchorage foundations in suspension bridge engineering. By comparing the FE-predicted results with the field measurements, the accuracy and reliability of the numerical models were verified. Additional calculations were also performed to study the influence factors of circular retaining structures. The following major findings were obtained: (1) The stresses in both the diaphragm walls and lining walls are relatively small, indicating that the arching effects of circular and double circular retaining structures are significant; (2) The main function of the lining walls is to enhance the rigidity of the diaphragm wall and to constrain its displacements, so the decrease in the lining wall thickness, the shape variation of the retaining structures and asymmetrical excavation make little difference to the structure stress. (3) The temperature change during circular or double circular excavation has a great influence on the stresses of the retaining structures.

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Section: Introductionmentioning

confidence: 92%

Mechanical Behaviors of Cylindrical Retaining Structures in Ultra-Deep Excavations

Xu¹,

Hu²,

Wang³

et al. 2015

Innovative Materials and Design for Sustainable Transportation Infrastructure

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“…For example, Poulsen proposed a method for calculating the coal pillar load by pressurearch theory, and the method was verified by the numerical calculation based on the shallow coal mining [6]. Kim et al investigated the arching effect on a vertical circular shaft by using experimental tests and theoretical analysis, and they quantified the distribution of the lateral earth pressure by three-dimensional arching effect [7].…”

Section: State Of the Artmentioning

confidence: 99%

Evolution Characteristics of Pressure-Arch and Elastic Energy during Shallow Horizontal Coal Mining

et al. 2018

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To ensure safety mining during shallow horizontal coal mining based on the monitoring data of the roof weighting of a typical mining engineering in China, the load distribution characteristics of the roof in the mining field were analysed, and the mechanical model of the pressure-arch in the surrounding rock was established. Then the evolution characteristics of the pressure-arch and elastic energy were revealed during shallow coal mining by theoretical and numerical analyses. Results show that the continuous pressure-arch can form when the horizontal stress exceeds the vertical stress, and the elastic energy of the roof is released by the mining unloading effect. The caved zone of the overlying strata is formed below the inner boundary of the pressure-arch. The elastic energy is accumulated in the pressure-arch and the energy becomes the highest at the front arch foot. The sliding of the caved zone along the shear zone in the mining field can induce the strong roof weighting. The concentrated stress and the released energy during each mining stage increase with the working face advancing, and the height of the shear zone also increases. This study can provide a theoretical reference for similar mining engineering.

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“…Many experimental tests revealed the phenomenon that the lateral pressure on the shaft lining decreases with increasing radial soil displacement during excavation [12][13][14][15]. Experimental tests and field tests carried out by Kim et al [16] and Cho et al [17] show that the lateral Earth pressure acting on a vertical circular shaft does not increase linearly as a function of depth. e lateral Earth pressure values they observed are about 80% smaller than those calculated by Rankine theory, considering the arching effect.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Impact of Blast‐Induced Damage on the Rock Load Supported by Liner in Construction of a Deep Shaft: A Case Study of Ventilation Shaft of Micangshan Road Tunnel Project

Fang

Yao

Walton

et al. 2020

Advances in Civil Engineering

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The rock load acting on the lining of an underground excavation is influenced by multiple factors, including rock type, rock mass condition, depth, and construction method. This study focuses on quantifying the magnitude and distribution of the radial loads on the lining of a deep shaft constructed in hard rock by the so-called short-step method. The blasting-induced damage zone (BDZ) around the shaft was characterized using ultrasonic testing and incorporated into the convergence-confinement method (CCM) and 3D numerical analyses to assess the impact of BDZ on rock loading against the liner. The results show that excavation blasting of shafts is an important controlling factor for the degradation of the rock mass, while the orientation and magnitude of the principal stress had a minimal influence on the distribution of blast-induced damage. The analysis shows that increasing the depth of blast damage in the walls can increase the loads acting on the lining, and the shear loads acting on the liner could be significant for shafts sunk by the short-step method in an area with anisotropic in situ stresses.

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The effect of arching pressure on a vertical circular shaft

Cited by 43 publications

References 14 publications

Mechanical Behaviors of Cylindrical Retaining Structures in Ultra-Deep Excavations

Mechanical Behaviors of Cylindrical Retaining Structures in Ultra-Deep Excavations

Evolution Characteristics of Pressure-Arch and Elastic Energy during Shallow Horizontal Coal Mining

Evaluating the Impact of Blast‐Induced Damage on the Rock Load Supported by Liner in Construction of a Deep Shaft: A Case Study of Ventilation Shaft of Micangshan Road Tunnel Project

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