Structural parameters and critical anchorage length of tunnel system bolts made of basalt fibre

Zhao, Dongping; Wen, Sixun; Wang, Luwei; Zhang, Baihao; Liu, Yang

doi:10.1016/j.conbuildmat.2021.125081

Cited by 13 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tunnel boring machine (TBM) based tunnel shielding technique is developing rapidly as it is an efficient and safe construction method for underground structures 1,2 . Zhang et al 3 observed responses of maglev structures undercrossed by three shield tunnels in soft soils.…”

Section: Introductionmentioning

confidence: 99%

“…Tunnel boring machine (TBM) based tunnel shielding technique is developing rapidly as it is an efficient and safe construction method for underground structures. 1,2 Zhang et al 3 observed responses of maglev structures undercrossed by three shield tunnels in soft soils. Gan et al 4 completed a case study in Hangzhou to investigate the responses of operating metro tunnels to compensation grouting of an underlying large-diameter shield tunnel.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Behaviors of arched tunneling segments reinforced by basalt fiber reinforced plastic rebars

Hou,

Feng,

Jiang

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

In this research, basalt fiber reinforced plastic (BFRP) rebars reinforced tunneling segment (BRRTS) technique was developed. All the BFRP rebars were designed, pre‐cured according to the reinforcement design and the reinforcement drawing of steel rebars reinforced concrete tunneling segments (SRRTSs). Two criteria, the equal reinforcement ratio criterion (ERRC) and the half stiffness principle (HSP), were applied to design the BRRTs. Bending experiments were performed to reveal the deformation, damage and load carrying capacity of the BRRTSs. With flexural‐shearing coupling failure mode, the BRRTS has longer elastoplastic deformation and comparable (ERRC) or much greater (HSP) load carrying capacity compared with traditional SRRTS, indicating that the BRRTS can replace the SRRTS in some cases.Highlights BFRP rebars reinforced tunneling segment was designed, constructed, and tested. BFRP rebars reinforced tunneling segment has long ductile deformation. BFRP rebars reinforced tunneling segment has higher load‐bearing capacity. Utilization efficiency of BFRP rebars varies from 0.565 to 0.646.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Behaviors of arched tunneling segments reinforced by basalt fiber reinforced plastic rebars

Hou,

Feng,

Jiang

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…At present, besides the material itself, three factors affect the anchoring performance of FRP anchors: the hole diameter, the type of grouting, and the anchoring length. Zhao et al 26 found that with the increase in the strength grade of cement mortar, the bond strength between FRP bars and cement mortar gradually increases. However, with the increase of the diameter of FRP bars, the bond strength between FRP bars and cement mortar gradually decreases.…”

Section: Introductionmentioning

confidence: 99%

Study on the anchoring performance and failure mechanism of basalt/glass hybrid fiber reinforced plastic anchors in coupled environment

Ren,

Wang,

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

To investigate the real anchorage performance of basalt and glass hybrid fiber reinforced plastic (FRP) anchors in external corrosive environments. In this paper, a combination of experimental studies and finite element analysis was used. By carrying out pull‐out tests of basalt and glass hybrid FRP anchors under the synergistic effect of freeze–thaw cycles and alkaline environment, the effects of factors such as hole diameter, anchorage length, and mortar strength on their anchorage performance and durability were investigated. Critical corrosion time was introduced to determine the degree of corrosion of the anchor rods. After that, it combined with numerical simulation to reveal the degradation mechanism of the anchorage performance of hybrid anchors. The results showed that the best anchorage performance of basalt/glass hybrid FRP anchors was achieved when the hole diameter was 24 mm, the anchorage length was 175 mm, and the mortar strength was 45.5 MPa. The ultimate pull‐out load was up to 122.16 kN. When the time did not exceed the critical corrosion time, the ultimate load‐carrying capacity of basalt and glass hybrid FRP anchors increased by 9.3% compared to the uncorroded environment. Beyond the critical corrosion time, the ultimate load‐carrying capacity was reduced by 23.3% and the anchorage performance was degraded. In addition, the contact interface between the anchor and the mortar is the weak area of the anchoring structure, which should be focused on in the later design of the actual project.Highlights Basalt/glass hybrid FRP anchors have good corrosion resistance. The anchoring performance of hybrid FRP anchors under the coupled environment is studied. Hole diameter and anchoring length have more influence on the anchor performance. The concept of critical corrosion time is put forward. The failure mechanism and coupling environment influence are revealed by FES.

show abstract

“…Taking the Muzhailing tunnel as the research context, the mechanical responses of anchor plates with different shapes and sizes have been systematically explored in squeezing large-deformation tunnels [24]. Zhao et al [25] put forward an anchor bolt developed using a basalt-fiber-reinforced polymer (BFRP), and the corresponding structure parameters and anchorage lengths were examined through numerical simulation and laboratory tests.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Anchor Bolts for Shallow Super-Large-Span Tunnels in Weak Rock Mass

He,

et al. 2023

Materials

View full text Add to dashboard Cite

Based on the Xiabeishan No.2 tunnel project of the Hang-Shao-Tai high-speed railway in China, the mechanical behavior of the anchor bolts for shallow super-large-span (SSLS) tunnels in weak rock mass is comprehensively investigated through laboratory tests, numerical simulation, and field tests. Firstly, an eight-month field test is conducted in the Xiabeishan No.2 tunnel, and it is discovered that the blasting vibration created by the construction of the middle pilot tunnel caused serious damage to the temporary support, seriously affecting the development of the bolt axial force and causing great construction risks. Then, the refined finite difference model of the SSLS tunnels is formulated, and a series of field and laboratory tests are conducted to acquire the calculation parameters. By comparing the monitored and simulated bolt axial force, the reliability of the numerical model is verified. Subsequently, the influence of the rock condition, construction scheme and bolt length on the mechanical behavior of anchor bolts is discussed. It is revealed that the rock grade significantly affects the bearing characteristics of anchor bolts. The construction scheme can greatly affect the magnitude and development mode of the bolt axial force, but the final distribution characteristics of the bolt axial force do not change regardless of the construction sequence. The axial force of the anchor bolts grows rapidly with the bolt length when the bolt length is within 18 m; meanwhile, when the bolt length exceeds 18 m, increasing the bolt length has a limited effect on the improvement in the bolt support performance. Finally, some optimization measures are proposed according to the monitoring data and simulation results.

show abstract

Structural parameters and critical anchorage length of tunnel system bolts made of basalt fibre

Cited by 13 publications

References 26 publications

Behaviors of arched tunneling segments reinforced by basalt fiber reinforced plastic rebars

Behaviors of arched tunneling segments reinforced by basalt fiber reinforced plastic rebars

Study on the anchoring performance and failure mechanism of basalt/glass hybrid fiber reinforced plastic anchors in coupled environment

Mechanical Behavior of Anchor Bolts for Shallow Super-Large-Span Tunnels in Weak Rock Mass

Contact Info

Product

Resources

About