BIM-Based Construction Simulation of Interlocking Steel Pipe Pile Cofferdams

Literature Overview

The paper by Tian Qiong et al. (2022), published in the Journal of Hunan Institute of Science and Technology (Natural Science Edition, Vol. 35, Issue 1, pp. 51-56), presents a case study on the application of Building Information Modeling (BIM) technology in the construction of interlocking steel pipe pile cofferdams. The research was conducted in the context of the Jiuyi Bridge project in Yongzhou City, Hunan Province, and was supported by the Hunan Provincial Social Science Achievement Review Committee (XSP21YBZ023) and the Hunan Provincial Natural Science Foundation (2019JJ40093). The authors are affiliated with the Philippines Christian University International Education Center, Hunan Institute of Science and Technology, and China Railway 17th Bureau Group Co., Ltd.

Core Technical Content

The study addresses a practical engineering challenge: the complexity of constructing interlocking steel pipe pile cofferdams in deep-water environments. Interlocking steel pipe piles, also known as sheet piles, are driven into the ground to form a continuous watertight wall. The interlocking mechanism — typically a tongue-and-groove or closed-type joint — is critical for maintaining the watertight integrity of the cofferdam. The construction of such cofferdams involves numerous sequential operations, including pile driving, waler installation, strut placement, dewatering, and excavation, all of which must be carefully coordinated.

The authors conducted a comparative analysis of different cofferdam construction schemes before selecting the interlocking steel pipe pile approach for the Jiuyi Bridge project. The BIM technology was then applied to create a parametric model of the cofferdam structure and simulate the entire construction process. This parametric modeling approach allows for rapid modification of design parameters and immediate visualization of the resulting structural configuration, facilitating design optimization before construction begins.

Key Technical Parameters and BIM Application

The BIM-based simulation provides several distinct advantages over traditional construction planning methods. First, it enables precise positioning of each interlocking steel pipe pile, which is critical for achieving proper interlock engagement and maintaining the watertight integrity of the cofferdam wall. Second, the simulation allows for the optimization of construction sequences, identifying potential conflicts between different operations and eliminating the need for rework. Third, it facilitates the early identification of construction difficulties, allowing the project team to develop mitigation strategies before they become critical issues on site.

Engineering Practice Implications

From the perspective of steel pipe manufacturing and welding, the BIM application to interlocking steel pipe pile cofferdams has several important implications. The interlocking profile of these piles is a complex geometric feature that requires precise manufacturing. Any deviation in the interlocking profile dimensions can lead to poor engagement, increased driving resistance, or even pile failure during installation. The parametric modeling capability of BIM allows for the verification of interlocking profile geometry before manufacturing, ensuring that the designed profile meets the required tolerances.

The welding connections in interlocking steel pipe pile cofferdams — particularly at splice connections between pile segments and at connections to waler beams — are critical structural elements. BIM modeling can be used to plan the welding sequence and access routes, ensuring that welders have adequate space and visibility to achieve high-quality welds. This is particularly important in confined spaces near the water surface, where access may be limited and welding conditions are challenging.

The construction sequence optimization enabled by BIM simulation has direct implications for welding quality. By planning the welding operations in advance, the project team can ensure that welds are performed under optimal conditions, with proper preheat temperatures, interpass temperature control, and post-weld inspection. The simulation can also identify potential thermal distortion issues and suggest countermeasures such as sequential welding patterns or temporary bracing.

Study Insights and Reflections

This paper represents a significant advancement in the application of digital technologies to traditional construction methods. The integration of BIM with interlocking steel pipe pile cofferdam construction demonstrates that even well-established construction techniques can benefit from modern digital tools. The parametric modeling approach is particularly valuable for projects with complex geometries or tight schedules, where the ability to rapidly evaluate alternative construction sequences can save significant time and cost.

The study also highlights the importance of interdisciplinary collaboration in modern engineering projects. The successful application of BIM to cofferdam construction requires expertise in civil engineering, construction management, and digital modeling. The collaboration between the academic institutions and the construction company (China Railway 17th Bureau Group) exemplifies the productive partnership between research and practice that drives engineering innovation.

For engineers involved in steel pipe and pipe fitting manufacturing, the BIM application to cofferdam construction suggests new opportunities for value-added services. By providing detailed BIM models of pipe products, manufacturers can facilitate the design and construction process, reduce the risk of errors, and enhance their competitiveness in the market. The parametric nature of BIM models also enables the creation of digital twins of manufactured products, which can be used for quality verification and construction planning.