Empowering Qianmen's Development, Preserving the Ancient Capital's Fabric — Xinyuan Air-Supported Structures Completes Another Project in Beijing's Core DistrictQianmen Street, as the pivotal hub of Beijing's southern central axis and a historic cultural district receiving over 100,000 visitors daily, embodies both the ancient capital's historical heritage and the city's vibrant, everyday atmosphere. With its dense array of shops, cluster of ancient structures, surrounding residential areas, and proximity to underground rail lines, excavation works must not only ensure smooth project progression but also balance environmental controls with public amenity. Consequently, inflatable membrane structures have emerged as the optimal solution for facilitating green construction practices.Plot G10 is situated at the north-west corner of the intersection between Qianmen Street and Zhushikou Street. The project site adjoins a metro station exit, presenting a constrained area with an elongated shape. To adapt flexibly to the confined construction space without disrupting the original fabric of the neighbourhood, Beijing Xinyuan Yijia Membrane Structure Technology Co., Ltd. – serving as both designer and contractor for the excavation pit air-supported membrane project – opted for an air-ribbed excavation pit membrane structure. This solution provides the site with an intelligent ecological protective cover.The excavation pit air membrane structure constitutes a beamless, column-free enclosed construction space primarily formed from high-strength PVDF membrane material and supported by air pressure. When integrated with ventilation systems, environmental monitoring sensors, and intelligent control systems, it delivers multiple functions including dust suppression, noise reduction, safety protection, and energy efficiency, precisely addressing the construction challenges inherent in urban core areas.The air-supported membrane structure developed by Xinyuan Air Membrane for the Qianmen Street G10 project features a fully enclosed design. This effectively blocks 99% of construction dust from escaping, significantly reducing surrounding PM2.5 and PM10 concentrations and meeting Beijing's specific dust control requirements. Addressing the challenge of construction noise disturbance, this air-supported membrane structure delivers equally impressive results. Its hollow-core air-supported walls maximise sound insulation, reducing construction noise by approximately 30 decibels. This effectively prevents disruption to the daily lives of nearby residents while safeguarding the urban acoustic environment around the Central Axis.Beijing Xinyuan Yijia Membrane Structure Technology Co., Ltd.'s excavation pit air-supported membrane employs a modular rapid-assembly design. From equipment and material delivery to installation completion and operational readiness, the process typically takes no more than 15 days, significantly reducing construction preparation time. The column-free, expansive interior of the air-supported membrane accommodates large-scale equipment such as mobile cranes without obstruction, eliminating concerns over structural elements hindering operational efficiency. Furthermore, the externally cable-supported membrane provides effective protection against adverse weather conditions including rain, snow, and high winds, enabling round-the-clock construction. This capability minimises project delays and cost overruns caused by inclement weather.From the meticulous governance of urban planning authorities, to the efficient and compliant construction practices of contractors, and ultimately to the comfortable and secure lives of citizens, the application of Beijing Xinyuan Yijia Membrane Structure Technology Co., Ltd.'s air-supported membrane system during excavation works at the G10 site on Qianmen Street in Beijing has not only resolved numerous challenges associated with excavation in core urban areas and historic cultural districts. It further exemplifies the development philosophy of technology empowering green construction and prioritising public welfare. It serves not merely as a simple ecological protective cover, but as a bond between urban development and historical preservation, a bridge for mutual benefit between construction firms and residents, and a vivid example of Beijing's commitment to green construction and meticulous governance.With the continued promotion and application of Xinyuan's air-supported membrane technology for excavation pits, it is anticipated that more urban construction projects will adopt this green innovation in the future. This approach safeguards both the historical heritage and ecological integrity of cities while enabling efficient project advancement, allowing the ancient capital's character and modern civilisation to forge a uniquely splendid synergy through green construction practices.