The Unified Strength Theory for Plastic Limit Load Analysis of Vertical Shaft Lining

Guo-fan, Zhao; Ren, Minghui; Qiu, Xianhao; Xue, Qinghua

doi:10.1155/2018/1949324

Cited by 2 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ding et al analyzed the failure characteristics and mechanical mechanism of the slope by the physical model test [25]. Zhao et al analyzed the plastic limit load of shaft lining based on the unified strength theory and discussed the relationship between the plastic limit load of shaft lining and the strength difference of structural materials [26]. Lyu and Wang monitored and analyzed the shaft lining deformation of the weakly cemented stratum in west China and obtained the limit deformation value of the shaft lining [27].…”

Section: Introductionmentioning

confidence: 99%

Monitoring and Analysis of a High-Performance Concrete Shaft Lining: A Case Study

Quan

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Shaft lining in ultradeep mines on the coast of eastern China under the complex external environments of “high in situ stress and high osmotic pressure” has the disadvantages of failure; to solve this problem, the field test of high-performance concrete shaft lining structure was carried out in Sha-ling gold mine. The field test study of the high-performance concrete shaft lining was carried out in a −1120 m ingate and a −1114 m to −1124 m shaft. Its stress and deformation were monitored and analyzed. The maximum compressive stress of the HPC shaft lining structure at the level of −1117.7 m of the air intake shaft is 1.91 MPa. Based on the Von-Mises yield theory and the analytical solution of thick-walled cylinder theory, the ultimate limit of the high-performance concrete shaft lining in the Sha-ling gold mine was obtained. The high-performance concrete shaft lining strain changes smoothly, and concrete strain can be divided into three stages: the rapid growth period, the slow growth period, and the stable period. The monitoring results show that the high-performance concrete shaft lining has excellent mechanical properties in the external environment of high in situ stress, which can be used as a reference for the support design of similar projects.

show abstract

Section: Introductionmentioning

confidence: 99%

Monitoring and Analysis of a High-Performance Concrete Shaft Lining: A Case Study

Quan

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…Based on the unified strength theory [24][25][26][27], the bolt supporting force is regarded as an internal force applied to the surrounding reinforcement, and its mechanical model is established to derive the expression of the tunnel stress and deformation under the composite lining effect. e generalized Kelvin model is used to analyze the creep characteristics of the surrounding rock [28][29][30][31], and the law of stress law of the initial support and secondary lining in the creep process of the surrounding rock is obtained.…”

Section: Introductionmentioning

confidence: 99%

Stress‐Strain Calculation Method of Composite Lining considering the Creep Characteristics of Tunnel Surrounding Rock

Huang

2021

Advances in Civil Engineering

View full text Add to dashboard Cite

Tunnels are generally designed for a sustained usage of 80 to 100 years, during which the safety of tunnel structures must be guaranteed. A common supporting form utilized in contemporary tunnel engineering is composite lining. To derive applicable parameters of the supporting form and therefore ensure the long-term safety of the tunnel structure, it is imperative to determine the extra acting force exerted onto the composite lining by the creep of the rock surrounding the tunnel and to calculate the stress-strain characteristics of composite lining. In the current study, this paper proposes an approach termed surrounding reinforcement, which is based on the homogenization method. Specifically, this paper defined the bolt force as the internal force of the surrounding rock, analyzed their viscoelastic-plastic properties using the unified strength theory, and derived an equation for calculating the stress-strain relationship of the composite lining. To further validate the method in tunnel structures, this paper applied the derived equation to a representative instance. The results of this paper show that the initial support force has also increased during the creep process of the surrounding rock, indicating that engineers should pay close attention to the coordination between the strength of initial support and the secondary lining and thus ensure an optimal distribution of the pressure from the surrounding rock when designing composite lining tunnel within weak strata. This paper proposes that the initial support not only would guarantee the tunnel safety during the construction stage but also could cooperate with the secondary lining to brace the stress caused by the creep, ensuring that the supporting structure stays stable across the whole period of tunnel operation. This paper provides an alternative to previous methods that is more comprehensive, with simpler calculations, and more applicable to the composite lining supporting design within weak strata.

show abstract

The Unified Strength Theory for Plastic Limit Load Analysis of Vertical Shaft Lining

Cited by 2 publications

References 8 publications

Monitoring and Analysis of a High-Performance Concrete Shaft Lining: A Case Study

Monitoring and Analysis of a High-Performance Concrete Shaft Lining: A Case Study

Stress‐Strain Calculation Method of Composite Lining considering the Creep Characteristics of Tunnel Surrounding Rock

Contact Info

Product

Resources

About