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Milling Mall Construction Method Case Study: Ise Bay Crossing Gas Pipeline Installation Project

Milling Mall Construction Method Case Study: Ise Bay Crossing Gas Pipeline Installation Project

Immediately after departure, excavate the stone masonry wire cage and tetrapod section of about 20 meters!

The construction site for the Ise Bay Crossing Gas Pipeline installation encountered the discovery of old stone masonry (large boulders) in addition to results from prior magnetic surveys indicating some metal reactions, leading to the adoption of the milling mole method. During the excavation of the launch shaft, the stone masonry and tetrapods that were unearthed were significantly larger than the nominal diameter of φ1000mm, making cutting very difficult. The thrust pipes also utilized composite steel pipes with rolling prevention features specifically designed for milling. During construction, fragments of large boulders and wire were discovered, and it is believed that the metal reaction was due to this wire, which was likely associated with the large boulders contained in a wire cage. 【Construction Case】 ■ Project Name: Ise Bay Crossing Gas Pipeline Installation (Gas Conduit Construction) ■ Client: Toho Gas Co., Ltd. ■ Contractor: Kajima Corporation ■ Pipe Diameter: 1000 ■ Thrust Length: 68.47m ■ Soil Type: Riprap, Sandy Soil ■ N Value/Gravel Ratio/Maximum Gravel Diameter: N=50 G=80% φmax=1000mm ■ Construction Period: 2011.12.11 to 2012.2.8 (2 months) ■ Type of Obstacle: Wire, Tetrapod Old Stone Masonry (Large Boulders) *For more details, please refer to the PDF materials or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Method Construction Case: Supply Work for the Nishishinbashi 1-Chome Project

Milling Mall Method Construction Case: Supply Work for the Nishishinbashi 1-Chome Project

All-rounder for construction work! Cutting 8 pieces of obstacle H300 at 4 locations!

This is an introduction to the achievements of the new construction work for the Hibiya Route tunnel as part of the Nishishinbashi 1-chome project supply work. After starting, we cut the first obstacle H300 at about 10 meters, and then continued to cut the second and third H300 obstacles at intervals of about 2 meters. We planned to cut the remaining three H300 obstacles before reaching the destination. However, in reality, we only cut up to the third obstacle from the beginning, and we did not encounter the remaining three obstacles (H300). 【Construction Case】 ■ Project Name: New construction work for the Hibiya Route tunnel as part of the Nishishinbashi 1-chome project supply work (Part 1) ■ Client: Marunouchi Thermal Supply Co., Ltd. ■ Contractor: Takeuchi Civil Engineering Co., Ltd. ■ Pipe Diameter: 2000 ■ Pushed Length: 78.30 m ■ Soil Type: Sandy Silt ■ N Value/Gravel Rate/Maximum Gravel Diameter: N=2 G=0% φmax=0mm ■ Construction Period: 2011.12.11 to 2012.2.8 (2 months) ■ Type of Obstacles: H-300, 4 locations, 8 pieces * For more details, please refer to the PDF document or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Method Construction Case: Reconstruction near Kasumigaseki 2-chome Part 2 Project

Milling Mall Method Construction Case: Reconstruction near Kasumigaseki 2-chome Part 2 Project

Cutting unexpected H-beams in six locations! A case study of construction work for thrusting on a heavily trafficked main road.

This is an introduction to the construction achievements of the reconstruction project near Nagatacho 1-chome and Kasumigaseki 2-chome, Chiyoda Ward, Phase 2. Initially, there was a possibility of two locations with reinforced concrete in the thrust pipeline section, and the thrust construction was conducted on a heavily trafficked main road. As a result of the construction, after cutting the reinforced concrete at two locations, we encountered unexpected obstacles. The unexpected obstacles were H-beams measuring H250 to H350, and we subsequently cut through six unexpected H-beams. 【Construction Case】 ■ Project Name: Reconstruction Project near Nagatacho 1-chome and Kasumigaseki 2-chome, Chiyoda Ward, Phase 2 ■ Client: Tokyo Metropolitan Sewerage Bureau ■ Contractor: Muramoto Construction Co., Ltd. Tokyo Branch ■ Pipe Diameter: 1500 ■ Thrust Length: 94.700 m ■ Soil Type: Clay ■ N Value/Gravel Ratio/Maximum Gravel Diameter: N=1-2 G=0% φmax=0mm ■ Construction Period: April 2015 to August 2015 (3.5 months) ■ Type of Obstacles: Reinforced concrete 2m thick at 2 locations 　　　　　　　Unexpected obstacles 　　　　　　　H-beams H-250 to H-350 at 6 locations *For more details, please refer to the PDF document or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Method Construction Case: Sewer Pipe Installation Work in Umiyama Town

Milling Mall Method Construction Case: Sewer Pipe Installation Work in Umiyama Town

Cutting of Storage Steel Sheet Pile Type III! Construction Case in Areas Where Road Regulations are Difficult.

We would like to introduce the construction results of the sewer pipe installation project in Umiyama Town, commissioned by the Sakai City Waterworks Bureau. It was believed that there was one location with a Type III steel sheet pile in the thrust pipeline section. The road where the thrust pipe was to be laid is a major thoroughfare with heavy traffic, making it difficult to regulate the road, so the project involved cutting the existing Type III steel sheet pile. As a result of the construction, one Type III steel sheet pile was cut. 【Construction Details】 ■ Project Name: Umiyama Town Sewer Pipe Installation Project ■ Client: Sakai City Waterworks Bureau, Sewer Division, Sewer Construction Section ■ Contractor: Union Tech Co., Ltd. ■ Pipe Diameter: 1100 ■ Thrust Length: 69.840m ■ Soil Type: Sandy Soil ■ N Value/Gravel Ratio/Maximum Gravel Diameter: N=4-9 G=0% φmax=57mm ■ Construction Period: August 2015 to September 2015 (1 month) ■ Type of Obstacle: Type III Steel Sheet Pile, 1 location *For more details, please refer to the PDF document or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Method Construction Case: Sanjiyachishima Main Line Diversion Pipe Construction Project

Milling Mall Method Construction Case: Sanjiyachishima Main Line Diversion Pipe Construction Project

Cutting at three locations in Matsuhang! Responding with forward exploration using electromagnetic waves and excavation management with a data logger.

This document introduces the construction achievements of the construction work for the Sangenya Chishima main line diversion pipe in Osaka City. Due to the presence of obstacles in the form of wooden piles, forward exploration using electromagnetic waves and excavation management using data loggers were conducted. Since the obstacles were wooden piles, no increase in excavation torque or thrust was observed, and the presence or absence of obstacle cutting was confirmed by the discharge of wood chips. 【Construction Case】 ■ Project Name: Sangenya Chishima Main Line Diversion Pipe Construction (Part 1) ■ Client: Osaka City Construction Bureau ■ Contractor: Kitabume Corporation ■ Pipe Diameter: 800 ■ Pushing Length: 127.61m ■ Soil Type: Sand and Silt ■ N Value/Gravel Ratio/Maximum Gravel Diameter: N=7 G=0% φmax=0mm ■ Construction Period: July 2, 2013 – August 10, 2013 (1 month) ■ Type of Obstacle: Wooden Piles φ150×3 pieces *For more details, please refer to the PDF document or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Construction Method Case Study: Onjigawa East Drainage Area Section 42 Sewer Construction

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.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Method Construction Case: Nishinari Branch Pipe 800mm Water Supply Pipe Installation Work

Milling Mall Method Construction Case: Nishinari Branch Pipe 800mm Water Supply Pipe Installation Work

All-rounder of construction work! A case study of cutting steel sheet piles Type III!

This construction involved the installation of water pipes, where a φ1000 thrust pipe was pushed through, followed by the insertion of a φ800mm water supply pipe. After approximately 161 meters from the start, the first obstacle was cut, and normal thrusting continued for about 7 meters. Subsequently, the second obstacle was cut, allowing normal thrusting to reach the remaining 244 meters. During the approximately 9-meter section crossing the national road, excavation was carried out while injecting chemical agents inside the machine. As a result of the construction, there was no metal reaction from the first obstacle. After injecting chemical agents inside the machine and proceeding with thrusting, a metal reaction from the second obstacle was confirmed, and cutting of the obstacle began, with the discharge of metal fragments being verified. 【Construction Example】 ■ Project Name: Nishi-Nari Branch Pipe (Nishi-Nari) 800mm Water Supply Pipe Installation ■ Client: Osaka City Waterworks Bureau ■ Contractor: Mori-gumi & Hanshin Construction Joint Venture ■ Pipe Diameter: 1000 ■ Thrust Length: 411.65m ■ Soil Type: Sandy Soil, Clayey Soil ■ N Value/Gravel Ratio/Maximum Gravel Diameter: N=10, G=0%, φmax=0mm ■ Construction Period: Day and Night Work (8h) for 4.0 months (2014.2.5 – 2014.5.10) ■ Type of Obstacle: Steel Sheet Pile Type III, 1 location *For more details, please refer to the PDF document or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Method Construction Case: Water Distribution Main Replacement Work

Milling Mall Method Construction Case: Water Distribution Main Replacement Work

It has been adopted for construction where there is a possibility of wooden stakes with a diameter of 300 mm existing in the pipeline section.

This is an introduction to the construction results of the replacement work for the water supply main (800mm and 500mm) between the vicinity of 1-chome, Nihonbashi Horitakemachi, Chuo Ward, and the vicinity of Nihonbashi Hisamatsu-cho, Chuo Ward. Initially, there was a possibility of wooden piles with a diameter of 300mm existing in the push pipe section; however, as a result of the construction, there were no wooden piles with a diameter of 300mm. 【Construction Case】 ■ Project Name: Replacement work for the water supply main (800mm and 500mm) between the vicinity of 1-chome, Nihonbashi Horitakemachi, and the vicinity of Nihonbashi Hisamatsu-cho, Chuo Ward ■ Client: Tokyo Metropolitan Waterworks Bureau ■ Contractor: PS Mitsubishi Corporation ■ Pipe Diameter: 1200mm ■ Pushing Length: 36.628m and 133.936m ■ Soil Type: Sandy silt ■ N Value/Gravel Rate/Maximum Gravel Diameter: N=1 to 4, G=0%, φmax=0mm ■ Construction Period: May 2015 to July 2015 (2.5 months) ■ Type of Obstacle: Insurance method, no obstacles *For more details, please refer to the PDF document or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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Milling Mall Method Construction Case: New Pipeline Construction for Oi Thermal Power Plant Substation

Milling Mall Method Construction Case: New Pipeline Construction for Oi Thermal Power Plant Substation

It's not surprising if anything comes out; the entire site is an example of land reclamation excavation.

This document introduces the construction achievements related to the new pipeline installation work at the Oi Thermal Power Plant. This project involved the installation of new pipelines within the Oi Thermal Power Plant, and due to the site being filled, it was uncertain whether sheet piles or H-beams would be encountered; it was possible to find concrete debris or metal fragments, among other things. In reality, only pine piles and what appeared to be concrete debris from some base were encountered, and the use of expansion jacks was not necessary. 【Construction Case】 ■ Project Name: New Pipeline Installation Work Related to Oi Thermal Power Plant ■ Client: Tokyo Electric Power Company Holdings, Inc. ■ Contractor: Wakachiku Construction Co., Ltd. Tokyo Branch ■ Pipe Diameter: 1350 mm ■ Pushing Length: 190.5 m ■ Soil Type: Clayey Soil ■ N Value / Gravel Ratio / Maximum Gravel Diameter: N=2–10 G=0% φmax=100 mm ■ Construction Period: August 2015 to October 2015 (2.5 months) ■ Type of Obstacles: Insurance Method, Pine Piles, Concrete Debris, Wood Pieces *For more details, please refer to the PDF document or feel free to contact us.

  • Site and ground investigation
  • Civil Engineering Method
  • Special Construction Method

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