The prediction of water level based on support vector machine under construction condition of steel sheet pile cofferdam

Wang, Jianjun; Jiang, Zijie; Li, Fan; Chen, Weiming

doi:10.1002/cpe.6003

Cited by 8 publications

(5 citation statements)

References 46 publications

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“…Firstly, through the literature review [1,2,36] and field research to establish the interview outline, the construction enterprises, supervision units, design units, and scientific research institutes and other experts on the basis of structured interviews, the questionnaire of safety risk assessment index of construction site was designed, and samples were selected for pretest investigation. After the reliability and validity test, the questionnaire was optimized and improved to form a formal questionnaire.…”

Section: Building the Safety Risk Assessment Index System Of Construction Sitementioning

confidence: 99%

“…e construction site risk assessment needs feasible methods, and the commonly used safety assessment methods at home and abroad mainly include safety checklist (SCL) [27,28], fuzzy comprehensive evaluation method (Fuzzy) [9,29,30], analytic hierarchy process (AHP) [31][32][33], fault tree analysis (FTA) [34,35], support vector machine (SVM) [36,37], and Fuzzy-Analytical Hierarchy process (FAHP) [38]. ese methods not only provide the theoretical basis for the production practice, but also lay the foundation for the subsequent theoretical research.…”

Section: Introductionmentioning

confidence: 99%

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Safety Risk Evaluation of Construction Site Based on Unascertained Measure and Analytic Hierarchy Process

Liang

Zhang²,

et al. 2021

Discrete Dynamics in Nature and Society

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Due to the high risk of construction sites, it is necessary to make safety risk evaluation. With the synthetic consideration of the complexity and uncertainty of construction sites, a comprehensive evaluation index system with two levels has been based on the emphases and difficulties of the current safety work in construction industry; the index system includes civilized construction site, management of machinery, equipment, materials, occupation health protection, and the subpackage management, such as 6 one-level evaluation indexes, inspection system of safety risk, safety awareness education, and prevention and control of occupation disease, such as 33 two-level evaluation indexes. The research takes “No. A residential building and other 8 projects” as the empirical analysis object, with the weights of the first indexes and second indexes being calculated by the analytic hierarchy process (AHP) and the information entropy, and applies the unascertained measure to comprehensively evaluate the safety risk of the construction project. The overall score of the project is 6.4475, the evaluation result is good, which is consistent with the actual situation, and the feasibility and effectiveness of the evaluation index system and evaluation model are verified, which provides a reference for safety risk management in the construction stage of construction projects.

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Section: Building the Safety Risk Assessment Index System Of Construction Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Safety Risk Evaluation of Construction Site Based on Unascertained Measure and Analytic Hierarchy Process

Liang

Zhang²,

et al. 2021

Discrete Dynamics in Nature and Society

View full text Add to dashboard Cite

show abstract

“…W al. [31] developed a prediction model for short-and medium-term water levels, e dynamic adjustment and adaptation to the actual needs of sheet pile cofferdam c tion. Although the above studies have analyzed the structural stability of cofferda the safety of the construction process, there is limited research on the structural of cofferdams in soft-ground foundations.…”

Section: Project Overviewmentioning

confidence: 99%

“…Ti et al [30] evaluated the stochastic wave pressure of a construction cofferdam for a bridge under the action of a tropical cyclone in terms of the pressure spectrum, pressure spectrum characteristics, transfer function, and maximum wave pressure. Wang et al [31] developed a prediction model for short-and medium-term water levels, enabling dynamic adjustment and adaptation to the actual needs of sheet pile cofferdam construction. Although the above studies have analyzed the structural stability of cofferdams and the safety of the construction process, there is limited research on the structural stability of cofferdams in soft-ground foundations.…”

Section: Introductionmentioning

confidence: 99%

Stability Study of a Double-Row Steel Sheet Pile Cofferdam Structure on Soft Ground

Jiang

Guo

Wang

et al. 2023

Water

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The stability of a double-row steel sheet pile cofferdam structure under soft ground conditions was investigated in this study, using the temporary cofferdam of the Shenzhen–Zhongshan cross-river channel as the engineering background. The stability of the cofferdam design solution was calculated with a model that incorporates factors such as the coordination of independent pile top displacement, as well as the m-value for backfilled sand and the thrown rock body. The internal force and displacement results of the cofferdam under different working conditions are obtained. And the entire construction process was analyzed using the finite element method. The results indicate that the overall stability and overturning stability of the cofferdam satisfy relevant safety requirements, with minimum safety factors of 1.744 and 1.400, respectively. The maximum displacement of the inner and outer steel sheet piles is 34 mm, the maximum bending moment is 249.30 kN·m, and the maximum shear force is 266.66 kN. The displacements of sheet piles were within an acceptable range, and the internal forces remained below the load capacity of the selected sheet pile type for the design. Based on these findings, the cofferdam structure can be considered safe and satisfying the specified requirements. This work may have instructive value for cofferdam design and construction.

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“…The short-term water level prediction model of the support vector machine was established. This model could accurately predict the short-term water level, ensuring the construction of the steel sheet pile cofferdam [28]. Zhao et al performed a sensitivity analysis to investigate the mechanism of the soil-structure interaction system by numerically simulating the behavior of the anchored sheet pile wall structure during excavation and backfill construction [29].…”

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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The prediction of water level based on support vector machine under construction condition of steel sheet pile cofferdam

Cited by 8 publications

References 46 publications

Safety Risk Evaluation of Construction Site Based on Unascertained Measure and Analytic Hierarchy Process

Safety Risk Evaluation of Construction Site Based on Unascertained Measure and Analytic Hierarchy Process

Stability Study of a Double-Row Steel Sheet Pile Cofferdam Structure on Soft Ground

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

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