FUDO Corporation (Headquarters: Shibuya-ku, Tokyo; President and Representative Director: Hiroharu Okumura; hereinafter referred to as "the Company"), a member of the Daiwa House Group, has developed a "Pump Feed Rate Control System" that smoothly and automatically places concrete by controlling the pump feed rate in response to the pressure applied to the formwork during the placement of lining concrete in mountain tunnels. The system was introduced in the "Hiroshima-Kure Road Kure Tunnel Construction" (Client: West Nippon Expressway Company Limited, Chugoku Branch) currently under construction by the Company in Kure City, Hiroshima Prefecture, and has been confirmed to enable labor savings of up to 50%. *1. A movable form used when constructing lining concrete for tunnels. Pump Feed Rate Control System ■ Background of Development During the lining of mountain tunnels, concrete is typically placed alternately on the left and right sides of the formwork. When concrete is placed on only one side and the height of the placed concrete rises, the lateral pressure on that side can increase excessively, raising concerns about deformation or displacement of the formwork, leading to insufficient finished dimensions. Therefore, when pressure tends to rise, the concrete pump's feed rate is reduced to adjust the concrete discharge volume. However, these judgments and operations have traditionally been performed manually based on the experience and intuition of the workers. Meanwhile, in the automatic placement of lining concrete, if pressure increases, emergency stops or other measures become unavoidable, which can interrupt the automatic placement and hinder the benefits of automation. To solve these challenges simultaneously, this system was developed. ■ System Overview The system combines the Company's developed "Pressure Watcher®," which monitors the pressure status on the formwork in real-time during lining concrete placement to prevent poor filling and voids, with the "T