Model test on the bearing behaviors of the tunnel-type anchorage in soft rock with underlying weak interlayers

Han, Yafeng; Liu, Xinrong; Li, Dongliang; Tu, Yiliang; Deng, Zhiyun; Liu, Dongshuang; Wu, Xiangchao

doi:10.1007/s10064-019-01564-5

Cited by 21 publications

(7 citation statements)

References 24 publications

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“…In recent years, the author and Chongqing Branch of the Yangtze River Academy of Sciences of China worked together to carry out four field model tests to study the mechanical behaviors, such as deformation evolution law, bearing characteristics, failure modes, and long-term stability, of TTAs in soft rock strata [8,36,38,39,[63][64][65][66][67]. is section summarizes the researches on soft rock TTA and some of the results obtained in order to provide a reference for the future studies of such TTAs.…”

Section: Mechanical Behaviors Of Ttas In Soft Rock Stratamentioning

confidence: 99%

A Comprehensive Review of the Mechanical Behavior of Suspension Bridge Tunnel-Type Anchorage

Han

Liu

Wei

et al. 2019

Advances in Materials Science and Engineering

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The recent surge of interest towards the mechanical response of rock mass produced by tunnel-type anchorage (TTA) has generated a handful of theories and an array of empirical explorations on the topic. However, none of these have attempted to arrange the existing achievements in a systematic way. The present work puts forward an integrative framework laid out over three levels of explanation and practical approach, mechanical behavior, and calculation method of the ultimate pullout force to compare and integrate the existing findings in a meaningful way. First, it reviews the application of TTA in China and analyzes its future development trend. Then, it summarizes the research results of TTA in terms of load transfer characteristics, deformation characteristics, failure modes, and calculation of ultimate uplift resistance. Finally, it introduces four field model tests in soft rock (mainly mudstone formations), and some research results are obtained. Furthermore, it compares the mechanical behavior of TTA in hard rock strata and soft rock strata, highlighting the main factors affecting the stability of TTA in soft rock formation. This paper proposes a series of focused topics for future investigation that would allow deconstruction of the drivers and constraints of the development of TTA.

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Section: Mechanical Behaviors Of Ttas In Soft Rock Stratamentioning

confidence: 99%

A Comprehensive Review of the Mechanical Behavior of Suspension Bridge Tunnel-Type Anchorage

Han

Liu

Wei

et al. 2019

Advances in Materials Science and Engineering

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“…Han et al [24] analyzed the bearing behavior of tunnel anchorage in the soft rock through a field model experiment and studied the influence of the geometric parameters of the plug body and the distance between the left and right plug bodies on the stress state of the weak interlayer combined with FLAC3D. To study the interaction between the left and right tunnels of the tunnel anchorage of a suspension bridge, Li et al [25] used finite difference numerical software to analyze the mechanical properties of surrounding rock during construction. Therefore, the field-scale experiment is of great significance to the stability and design of TTA.…”

Section: Introductionmentioning

confidence: 99%

Field-Scale Experiment on Deformation Characteristics and Bearing Capacity of Tunnel-Type Anchorage of Suspension Bridge

et al. 2022

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The suspension pipe bridge has become the main span type due to its large span, light structure, and other characteristics, playing an important role in the construction of the oil and gas backbone network and energy layout. Tunnel-type anchorage (TTA) is a special underground structure that provides anchorage tension for the suspension bridge. Since its form and bearing mechanism are complex, there is no general design method for tunnel-type anchorage so far, and the theoretical and normative research is not mature. In this paper, a field-scale experiment was carried out to study the north side tunnel of Wujiagang Bridge in Yichang, China. According to the similarity principle, the 1:12 tunnel anchor scale model was established. The tunnel anchor scale model is selected in the area adjacent to the actual project site to ensure the similarity of stratigraphic conditions. Through the use of a displacement meter, inclinometer hole, strain gauge, micrometers, and other comprehensive monitoring methods, the design load test, overload test, overload rheological test, and ultimate bearing capacity failure test were carried out. Through the structural deformation observation and stress observation of the anchorage body and surrounding rock, the stress deformation characteristics and rheological characteristics of the anchorage body and surrounding rock in the field-scale experiment were analyzed. The deformation failure mechanism, deformation failure process, potential failure mode, and overload capacity of solid tunnel anchor were studied. The control indexes such as deformation and stress values of key parts of the solid tunnel anchor at different stages are predicted. Based on the limit equilibrium analysis results of the model, the safety and rationality of the tunnel anchorage structure design of the actual suspension bridge were evaluated.

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“…To improve the bearing performance of SR and control the deformation of SR, bolts (cables) are often used to strengthen the SR actively. is support method generates effective radial constraints on SR within a certain range of tunnels, improves the SR strength, and makes SR an effective bearing body to jointly resist the deformation and fracture of SR outside the loose ring and maintain the safety and stability of tunnels [3,4]. With an increase in coal mining depth, the SR of deep mining roadway is affected by high crustal stress and mining disturbances, exhibiting large deformations, high ground pressure, and nonlinear failure characteristics of support [5,6].…”

Section: Introductionmentioning

confidence: 99%

Bearing Characteristics of Surrounding Rock of Deep Mining Roadway with Full and End Bolt Anchorages: A Comparative Numerical and Experimental Study

Shi

et al. 2021

Advances in Civil Engineering

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The support strength of surrounding rock in deep mining roadways can be significantly improved by replacing the end bolt anchorage with a full one. The support effects of both types of anchorage and the axial stress distribution characteristics in anchored bolt bodies were assessed via the indoor pull-out test, simulated via the FLAC3D software, and verified by field measurements. The stability and variation patterns of the axial force, as well as the evolution law of bearing characteristics of surrounding rock, were analyzed. The results indicate that the polymorphic deformations of deep mining roadway surrounding rock and the bolt support body interact synchronously. The axial force evolution trend in bolt bodies with end anchorage revealed by field tests was consistent with the laboratory test results, in contrast to that of full anchorage. Although stress distribution laws in both sides of the mining roadway were the same for both types of anchorage, the vertical stress peak and damage range of full-anchored surrounding rock slightly exceeded those of the end-anchored one. The anchored area bearing a higher load alleviated the stress concentration of the surrounding rock. Since the deformations in fully and end anchored surrounding rocks increased gradually and sharply, respectively, the full anchorage is more conducive to deformation moving control of deep mining roadway surrounding rock. The research results can provide theoretical guidance for the design and construction of deep mining roadway bolt support.

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Model test on the bearing behaviors of the tunnel-type anchorage in soft rock with underlying weak interlayers

Cited by 21 publications

References 24 publications

A Comprehensive Review of the Mechanical Behavior of Suspension Bridge Tunnel-Type Anchorage

A Comprehensive Review of the Mechanical Behavior of Suspension Bridge Tunnel-Type Anchorage

Field-Scale Experiment on Deformation Characteristics and Bearing Capacity of Tunnel-Type Anchorage of Suspension Bridge

Bearing Characteristics of Surrounding Rock of Deep Mining Roadway with Full and End Bolt Anchorages: A Comparative Numerical and Experimental Study

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