Mechanism of Secondary Lining Cracking and its Simulation for the Dugongling Tunnel

Liu, Naifei; Li, Ning; Xu, Chongbang; Li, Guofeng; Song, Zhanping; Yang, Min

doi:10.1007/s00603-020-02183-3

Cited by 59 publications

(31 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the basis of analyzing the factors affecting the nonlinear creep characteristics of salt rock, Wang et al [147] proposed a nonlinear viscous body and assumed the relationship between the viscosity coefficient and stress level and creep time can be expressed by equation (20). And then, an improved Burgers model that is used to describe the creep behaviors of salt rock in the decay and steady stage can be established by replacing the Newton body in the Burgers model with the proposed nonlinear viscous body (as shown in Figure 17(a)).…”

Section: Propose a Nonlinear Elementmentioning

confidence: 99%

See 1 more Smart Citation

Creep Properties and Constitutive Model of Salt Rock

Zhang

Song

Wang

et al. 2021

Advances in Civil Engineering

Self Cite

View full text Add to dashboard Cite

Due to the advantages of low porosity, low permeability, high ductility, and excellent capacities for creep and damage self-healing, salt rock is internationally considered as the ideal medium for underground storage of energy and disposal of radioactive waste. As one of the most important mechanical properties of salt rock, creep properties are closely related to the long-term operation stability and safety of salt rock underground storage cavern. A comprehensive review on the creep properties and constitutive model of salt rock is put forward in this paper. The opinions and suggestions on the research priority and direction of salt rock's mechanical properties in the future are put forward: (1) permeability variation of salt rock under the coupling effect of temperature and stress; (2) damage mechanism and evolution process under the effect of creep-fatigue interaction and low frequency cyclic loading; (3) microdeformation mechanisms of salt rock and the relationship between microstructure variations and macrocreep behavior during creep process; (4) the establishment of the creep damage constitutive model with simple form, less parameters, easy application, and considering the damage self-healing ability of salt rock simultaneously.

show abstract

Section: Propose a Nonlinear Elementmentioning

confidence: 99%

“…Once an accident occurs, it not only affects the security of energy reserve but also causes heavy loss of the people's life and property. erefore, to ensure the long-term safety and stability of the USC, it is necessary to study the creep properties of salt rock [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Creep Properties and Constitutive Model of Salt Rock

Zhang

Song

Wang

et al. 2021

Advances in Civil Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Method. To overcome the poor self-stabilization ability of surrounding rock of loess tunnel, the double-sides heading method is often used to divide the large-section cavern into multiple excavation sections for construction [3,14,15]. Too long or too short distance (excavation face distance) between multisection excavated caverns is not conducive to the stability of surrounding rock, so how to determine a reasonable distance between excavation caverns is a problem that needs comprehensive consideration when large-section excavation is carried out in loess strata [14,38].…”

Section: Construction Scheme Of the Double-sides Headingmentioning

confidence: 99%

“…Xi'an, as the largest western central city in China, has a total population of about 10 million; the underground traffic construction has made rapid development in recent years. Loess geology is widely distributed in Xi'an area of China, which leads to the problems of shallow-buried structure, weak geology, poor self-stability of surrounding rocks, low bearing capacity, and fast deformation of tunnels in this area [1,3,4]. e history of building structures in loess strata has been developed for thousands of years in China, but the construction of subway tunnels in loess areas began in the early 1960s [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Construction Parameters and Deformation Characteristics of Large‐Section Loess Tunnel: A Case Study from Xi’an Metro

Zhao

Cheng

Song

et al. 2021

Advances in Civil Engineering

Self Cite

View full text Add to dashboard Cite

Loess geological tunnels are characterized by weak geological structure and poor self-stability of surrounding rock, so effectively controlling the excavation face distances of different caverns is of great significance for guiding the safe construction of large-section tunnels. Based on the excavation of large-section loess tunnel from Xi’an Metro Line 4, the optimal excavation face distance is determined based on Midas numerical model. Then, the surface settlement and horizontal deformation are analyzed based on monitoring data, and, finally, the rationality of excavation face distance is verified. The results show that the influence of excavation face distance on surface settlement, vault settlement, and horizontal deformation is consistent. The surface settlement mainly occurs in the range of −20∼20 m from the tunnel centerline and the settlement trough formed has asymmetric characteristics. The vault settlement and horizontal deformation undergo first a rapid settlement and then a slow settlement. The connection between initial support and middle partition is mainly tensile stress and the middle and bottom parts of the supporting structure are mainly compressive stress. Numerical results suggest that the optimal excavation faces distance of L1, L2, and L3 which can be 4, 9, and 9 m, respectively. Construction monitoring data show that the double-sides heading method has a significant effect on surface settlement, vault settlement, and horizontal deformation. The surface settlement occurs within the range of −17∼6 m from the tunnel centerline. The maximum vault settlement and horizontal deformation are 73.00% and 65.50% of the maximum allowable. It can be seen that the actual excavation parameters optimized by Midas numerical model have high reliability.

show abstract

“…Under high rainfall and subsurface flow conditions, water typically accumulates in fissures. During the cooling process, the freezing of water induces a volume expansion of approximately 9% [6,7]. When cracked ice is restricted by the surrounding rock medium, it generates volumetric dilatancy pressure, also known as, frost-heaving pressure.…”

Section: Introductionmentioning

confidence: 99%

Frost-Heaving Cracking Sensitivity of Single-Flaw Rock Mass Based on a Numerical Experimental Method

Wang

Tang

Ping-feng³

et al. 2021

Geofluids

View full text Add to dashboard Cite

A novel numerical experimental method is developed herein to study frost-heaving cracking in fractured rock masses by reproducing the physical experimental frost-heaving process. The failure mode of a preexisting closed and water-saturated single-flaw in a rock mass during the frost-heaving process is affected by the inclination angle, flaw width, crack length, and cooling rate. Additionally, a regression model for predicting secondary crack formation and propagation is established by combining multiple stepwise regressions. Overall, the results indicate that preexisting flaw with various inclination angles, flaw lengths, and cooling rates mainly propagates along the flaw-coplanar direction. The secondary crack failure mode is most affected by the flaw width, and the length of the secondary crack increases with increasing inclination angle, flaw width, and flaw length, but decreases with increasing cooling rate. The contributions of the investigated factors to the secondary crack length follow the order: flaw width > inclination angle > cooling rate > flaw length. The results presented herein provide crucial theoretical guidance for engineering and construction projects in cold regions.

show abstract

Mechanism of Secondary Lining Cracking and its Simulation for the Dugongling Tunnel

Cited by 59 publications

References 25 publications

Creep Properties and Constitutive Model of Salt Rock

Creep Properties and Constitutive Model of Salt Rock

Optimization of Construction Parameters and Deformation Characteristics of Large‐Section Loess Tunnel: A Case Study from Xi’an Metro

Frost-Heaving Cracking Sensitivity of Single-Flaw Rock Mass Based on a Numerical Experimental Method

Contact Info

Product

Resources

About