Model Test Study on Deformation of Snowflake Shaped Steel Sheet Pile Based on OFDR

Gao, Lei; Xu, Zhongquan; Wang, Quan; Zhang, Zhenlei; Ping, Li

doi:10.3390/s21217062

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…The results showed that geogrids can provide resistance in the active zone under strip footing surcharge loading. Gao et al [22] developed a snowflake-shaped steel sheet pile and conducted model tests based on optical frequency-domain reflector distributed optical fiber sensor technology. The results indicated that due to the complex cross-section shape, strain varies with position.…”

Section: Introductionmentioning

confidence: 99%

Stability Investigation of Fully Recycled Support System of Steel-Pipe-Anchored Sheet Pile in Soft Soil Excavation

Li,

Wu,

Yang

et al. 2024

Applied Sciences

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As a temporary project, the supporting system of excavation often encounters issues such as the waste of support components, environmental pollution, and high carbon emissions. This article presents a foundation pit support technology that utilizes steel tube anchorage sheet piles, which can be assembled and fully recycled. The composition of the support system is also introduced. Furthermore, a large-scale model test of steel-pipe-anchored sheet piles was designed and implemented. The displacement of each component of system and stability during excavation were investigated using 3D finite element modeling and analysis. The study results indicate that the deformation and failure mode of the model foundation under the steel-pipe-anchored sheet pile support system are closely related to the distance between the pipe pile and the sheet pile. When the distance is 10 cm, both the pipe pile and the sheet pile tilt simultaneously. When the distance is approximately 30–50 cm, the sliding surface becomes exposed from the position of the pipe pile. At distances up to 100 cm, the sliding surface is exposed between the pipe pile and the sheet pile. The anchoring effect of pipe piles and tie rods can effectively reduce the horizontal displacement of the sheet pile itself. The horizontal displacement at the top of both the pipe pile and sheet pile remains consistent throughout the excavation period of this model foundation. During excavation, measured earth pressure on the sheet pile is less with theoretical active earth pressure. After excavation, the maximum horizontal displacement of the top of the pipe pile exhibits a hyperbolic relationship with excavation depth.

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Section: Introductionmentioning

confidence: 99%

Stability Investigation of Fully Recycled Support System of Steel-Pipe-Anchored Sheet Pile in Soft Soil Excavation

Li,

Wu,

Yang

et al. 2024

Applied Sciences

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“…Steel sheet piles were used as pile foundations with a large surface area and high strength to improve the bearing capacity. Model tests were conducted using the OFDR technique, and the results showed its strain distribution characteristics [14]. The effect of the surface roughness of steel sheet piles on the lateral bearing behavior of piles embedded in the sand was investigated.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Sheet Pile Cofferdam during Adjacent Open Cut Tunnel Construction near Lake Bottom

Cui

2023

Applied Sciences

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In water-related projects, the application of steel sheet pile cofferdams is becoming more and more widespread, and the influence of tunnel construction on the mechanical properties of adjacent cofferdams is important. In this study, the object of research was the mechanical properties of large-span steel sheet pile cofferdams. The open-cut tunnel project was located in Suzhou Yinshan Lake, China. According to the actual construction steps of the tunnel foundation pit, assuming that the soil was a small strain hardening soil model, combined with on-site monitoring data, a three-dimensional elastoplastic finite difference model was established. The results show that during tunnel construction, the maximum settlement of the cofferdam appeared at 0.27~0.53 m on the side of the foundation pit; the maximum horizontal displacement of the steel sheet pile occurred at the pile bottom of foundation pit side, and the seepage gradually increased during construction, eventually resulting in water gushing at the bottom of the foundation pit. After the completion of tunnel construction, the settlement value of the cofferdam presented a pattern that first increased and then decreased from the side of the foundation pit to the side of the adjacent lakeside; the steel cofferdam tilted toward the side of the foundation pit, with a maximum inclination angle of 3.37°. It should be pointed out that as the construction progressed, the axial force of the tie rods in the steel cofferdam changed from a U-shaped distribution to a V-shaped distribution. This study could provide a reference for the impact of tunnel foundation pit construction on adjacent steel cofferdam and could also provide a reference for the safety research of open-cut tunnel construction.

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Distributed Monitoring of Sheet Piles in a Cofferdam Using Optical Frequency Domain Reflectometry Technology

Jiang,

Bi,

Yang

et al. 2024

Indian Geotech J

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Model Test Study on Deformation of Snowflake Shaped Steel Sheet Pile Based on OFDR

Cited by 8 publications

References 19 publications

Stability Investigation of Fully Recycled Support System of Steel-Pipe-Anchored Sheet Pile in Soft Soil Excavation

Stability Investigation of Fully Recycled Support System of Steel-Pipe-Anchored Sheet Pile in Soft Soil Excavation

Mechanical Properties of Sheet Pile Cofferdam during Adjacent Open Cut Tunnel Construction near Lake Bottom

Distributed Monitoring of Sheet Piles in a Cofferdam Using Optical Frequency Domain Reflectometry Technology

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