Milling Mall Construction Method Case Study: Onjigawa East Drainage Area Section 42 Sewer Construction
All-rounder in construction work! A case study of cutting φ1800 concrete pipes!
This is an introduction to the achievements of the sewer construction work for the Onjigawa East Drainage Area, Section 42, which was carried out in the fiscal year 2012. Immediately after the start, the existing push pipe, a φ1800mm concrete pipe, was cut diagonally over a distance of 8.21m due to obstacles, and then normal excavation was performed to reach the existing special manhole. At the existing manhole, the head was completely damaged, and the plan was to disassemble and recover everything else. 【Construction Case】 ■ Project Name: Sewer Construction for Onjigawa East Drainage Area, Section 42, Fiscal Year 2012 ■ Client: Yao City, Osaka Prefecture ■ Contractor: Asanuma Corporation ■ Pipe Diameter: 1800mm ■ Pushing Length: 119.86m ■ Soil Type: Sandy Soil, Clayey Soil ■ N Value/Gravel Ratio/Maximum Gravel Diameter: N=13, G=4%, φmax=19mm ■ Construction Period: 2013.06.01 to 2013.08.30 (3 months) ■ Type of Obstacle: φ1800 Concrete Pipe, 8.2m *For more details, please refer to the PDF document or feel free to contact us.
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【Milling Mall Method: Four Special Functions】 ◎ Exploration: Detecting metal obstacles ahead while advancing the excavation. ◎ Improvement: Ground improvement from inside the tunneling machine before and after the obstacles. ◎ Cutting: Crushing and discharging metal obstacles into pieces. ◎ Guidance: Guiding the tunneling machine to the designated position of the vertical pile. *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Yasuda Engineering Co., Ltd. has been a specialized company in public sewer construction, contributing to the environmental development of the local community since its establishment in 1975. We have pursued sound management and advanced technical capabilities, continuing to make steady progress. In 2001, we acquired the international standard "ISO9001" and expanded into the field of general civil engineering. We aim to be a corporate group capable of continuous innovation as a comprehensive construction company, including building construction. "Honing our technology with rich sensibility, we evaluate from a fair perspective to enhance the vitality of the company in order to meet our customers' needs." This is the management policy of Yasuda Engineering Co., Ltd. We, Yasuda Engineering Co., Ltd., are committed to uniting all employees to refine our technical skills and create a new future.
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