Milling Mall Construction Method Case Study: Onjigawa East Drainage Area Section 14 Sewer Construction

All-rounder in construction work! A case study of cutting H-beams in two locations.

This introduces the construction achievements of the Heisei 24 fiscal year Onjigawa East Drainage District Section 14 sewer construction. At this site, it was believed that an H-beam (H-300) was located approximately 5.5 meters from the start of the thrust pipe section. The H-beam, which was an obstacle, was cut diagonally, and after passing through, a second H-beam was similarly cut diagonally about 4 meters later, after which normal excavation was carried out. As a result, two H-beams (H-300) were cut, and the discharge of metal fragments was confirmed. 【Construction Case】 ■ Project Name: Heisei 24 Fiscal Year Onjigawa East Drainage District Section 14 Sewer Construction ■ Client: Yao City, Osaka Prefecture ■ Contractor: Bun-Iwakumi Co., Ltd. ■ Pipe Diameter: 1000 ■ Thrust Length: 229.25m (45R, 70R, 100R×2, 200R 5 curves) ■ Soil Type: Sandy soil and clayey soil ■ N Value/Gravel Ratio/Maximum Gravel Diameter: N=4-35 G=0% φmax=57mm ■ Construction Period: Daytime construction (6h) for 3 months (2015.01 to 2015.3) ■ Type of Obstacle: H-beam H-300, 2 locations *For more details, please refer to the PDF document or feel free to contact us.

Site and ground investigationCivil Engineering MethodSpecial Construction Method