Our company has successfully passed the High-Tech Enterprise certification three times in a row.

Luoyang Jiujiu Technology Development Co., Ltd. applied for and successfully obtained High-Tech Enterprise certification in 2008, underwent a re-evaluation as a High-Tech Enterprise in October 2011, and was re-certified as a High-Tech Enterprise again in October 2014.

2015-02-06

In 2010, four expressways connecting China's Yunnan province to Southeast and South Asia were completed.

Relevant authorities in Yunnan Province have learned that construction is accelerating on four high-grade highways in the province, which are oriented toward Southeast and South Asia. By 2010, the Yunnan sections of these four major international corridors—connecting to both regions—will be fully completed.

2013-08-26

Development Updates on Shield Machine Cutter Tools from Luoyang Jiujiu Company

China began developing tunnel boring machines in the early 1960s and conducted extensive exploratory experiments on roller cutter materials. However, at that time, there were no specialized manufacturers of roller cutters, and research institutions lacked sufficient funding to support these experimental efforts. As a result, the development of roller cutters fell short of expectations, though some exploration was carried out on scraper tools for TBM operations in weak geological conditions. By the mid-1990s, the Ministry of Railways initiated a feasibility study for adopting the TBM (Tunnel Boring Machine) approach in the Qinling Tunnel project of the Xi'kang Railway. Since the roller cutter segments are the primary rock-breaking components of TBMs, their high consumption significantly increased construction costs and delayed project timelines. Moreover, imported cutter segments were not only expensive but also suffered from lengthy delivery times. In response, the Ministry of Railways established a dedicated task force in the late 1990s to tackle the challenge of domestically producing disc-type roller cutters for full-face tunneling machines.

2013-08-26

The company has been honored as the Henan Province Shield Machine Cutter Engineering Technology Research Center.

In 2010, our company, as a high-tech enterprise located within the Luoyang High-Tech Development Zone, was recognized for its outstanding achievements in technological innovation and advancements. We have received provincial-level or higher awards for scientific and technological progress, possess core industry technologies backed by independent intellectual property rights, and demonstrate strong industry influence, firmly positioning us as a leader in our field. In accordance with the "Key Work Priorities for the Construction of Henan Provincial Engineering Technology Research Centers in 2010," our company actively participated in the application process for establishing such a center. Thanks to the dedicated collaboration of leaders and employees across all departments, our proposal was thoroughly reviewed and validated by experts from the Henan Provincial Department of Science and Technology. As a result, our company was officially approved to establish the Henan Provincial Shield Machine Cutter Engineering Technology Research Center. This milestone is pivotal in accelerating our company’s ability to drive independent innovation, enhancing the commercialization of scientific and technological achievements, and bolstering the development of our innovation team while nurturing top-tier scientific talent. Moving forward, we are committed to intensifying R&D activities, ensuring that the newly established engineering technology research center becomes a powerful catalyst for both our organization and the broader industry—propelling sustainable and rapid growth in the years ahead.

2013-08-26

Beijing Metro Line 10 Phase II: First Section of Tunnel Boring Machine Passage Fully Connected

Good news has arrived from the construction site of Section 17, Phase II of Beijing Subway Line 10, managed by Beijing Zhuzong Municipal Engineering Company—the first tunnel segment for the entire second phase of Line 10 has been successfully completed. As the Tiantun No. 7 tunnel boring machine (TBM) began operation, its cutterhead broke through the soil and gradually entered the pre-installed tunnel portal ring, seemingly smiling with joy as it marked this significant milestone. This breakthrough also signifies the smooth completion of the right-line tunnel section between Huoqiying Station and the terminal point for this particular section. The right-line tunnel section in this segment measures 940.187 meters, while the left-line stretches 963.289 meters, totaling 1,903.476 meters in combined length. The TBM was launched on February 22, 2010, from the right-line starting point near Bagou Village. During its journey, it safely navigated under several critical infrastructure elements, including the northbound track of Landing Factory North Road, the Kunyu River, and the southbound track of Landing Factory North Road. Additionally, it passed closely alongside one to two-story buildings belonging to the Haidian Branch Office of the Beijing Municipal Transportation Bureau, as well as beneath the west-side bridge piers of the Wanquan River Interchange overpass—each posing unique challenges. Throughout the process, the TBM encountered an intricate network of underground utilities, including 41 separate pipelines such as telecommunications cables, power lines, water supply and drainage systems, and gas pipes. Notably, five of these were rainwater and sewage pipelines, each exceeding 1 meter in diameter.

2013-08-26

Wuhan Erqi Yangtze River Bridge Bored Pile Construction Technology Seminar

The "Wuhan Erqi Yangtze River Bridge Bored Pile Construction Technology Seminar" was held in Wuhan on March 27. The meeting was organized and chaired by the China Communications Construction Company Second Navigation Bureau, the leading institution of the National Large-Diameter Engineering Well Construction Technology Collaboration Network. This marked an academic gathering of the "National Large-Diameter Engineering Well Construction Technology Collaboration Network."

2013-08-26

Warmly celebrating the launch of Jiujiu Company's new site

Warmly celebrate the launch of Jiujiu Company's new site!

2013-08-26

China's domestically developed tunnel-boring equipment has achieved a localization rate of 60 percent.

The prototype slurry balance tunneling machine "Jin Yue," developed and built by five organizations including Shanghai Urban Construction Tunneling Co., Ltd., boasts full independent intellectual property rights and a diameter of 11.22 meters. It was successfully deployed in the Dapu Road twin-tunnel project—a key infrastructure supporting the Shanghai World Expo—and completed the 1,472-meter-long tunneling task flawlessly. During construction, the "Jin Yue" slurry balance shield machine operated smoothly, showcasing the exceptional maneuverability and precision of domestically produced shield equipment, especially when it came to protecting nearby structures and navigating ultra-small-radius tunneling sections.

2013-08-26

Conference Paper Directory

**Table of Contents for the 9th National Symposium on Large-Diameter Engineering Well Construction Techniques** 1. **Ultra-Large Diameter Bridge Composite Pile Foundation System** Jiang Wei, Diao Xinhong (School of Civil Engineering, East China Jiaotong University, Nanchang, Jiangxi) 2. **Trenchless Construction Techniques for Large-Diameter Pipelines** Ding Yiming (Branch No. 5, Sixth Company, Tianjin Urban Construction Group, Tianjin, 300250) 3. **Application of Roller Cutter Bits in Large-Diameter Mine Shaft Construction: Key Considerations** Chao Huanqing, Wang Hanzhang Luoyang Jiujiu Technology Development Co., Ltd. 4. **Drilling Construction of Large-Diameter Foundation Piles in Fractured and Sliding Layer Geology** Zhang Jinlin, Xie Tang (Luqiao Huannan Jinlin Foundation Engineering Co., Ltd., Zhongshan, Guangdong) 5. **Construction Techniques for Large-Diameter Deep Bored Pile Foundations under Special Conditions: A Case Study from the Tianjin Binhai New Area Light Rail Project** Zhu Mingsheng, Xie Kongjin, Gai Jianguo, Xu Hongwei, Li Liangliang (Shandong Zhengyuan Construction Engineering Co., Ltd., Jinan, 250014) 6. **Leveraging Technological Advancements to Drive Enterprise Growth** Chen Hongru, Li Shijing (Shenzhen Ruzi Niu Construction Engineering Co., Ltd.) 7. **Drilling Techniques for the Yichang Yangtze River Bridge on the Yiwan Railway** China Railway Major Bridge Engineering Group Co., Ltd. 8. **Pile Foundation Construction and Project Management for the Madura Bridge in Indonesia** Wang Jianjun, Liu Mufeng, Yi Jianying, Mao Shanyuan (Hunan Foundation Engineering Co., Ltd., No. 76, Section 3, Wanjiali Middle Road, Changsha, 410014) 9. **Preliminary Study on the Relationship Between Scraper Entry Angle, Drilling Pressure Ratio, and Hole-Forming Efficiency in Comb-tooth Drill Bit Applications** Gu Yuanxing Shanghai Guanglian Construction & Development Co., Ltd. 10. **Application of Horizontal Directional Drilling Technology in Tunnel Engineering** Li Shuhai, Zhou Haishong (Shanghai Guanglian Construction & Development Co., Ltd.) 11. **Practical Experience in Handling Downhole Incidents During Large-Diameter Bored Pile Construction** Li Shuhai, Zhou Haishong, Wang Yuanman (Shanghai Guanglian Construction & Development Co., Ltd., Shanghai, 200436) 12. **A New Approach to Pipeline Replacement Using Horizontal Directional Drilling Technology** Li Shuhai (Shanghai Guanglian Construction & Development Co., Ltd., Shanghai, 200438) 13. **Application of Long-Tube Canopy Advanced Support Systems in Tunnel Portal Construction** Ou Lingyong Hunan Road & Bridge Construction Group 14. **Monitoring and Measurement during Snowfeng Mountain Tunnel Construction: Analysis of Surrounding Rock Stability** Cao Caiyong (Hunan Provincial Road & Bridge Group Co., Ltd., Changsha, Hunan, 410000) 15. **Analysis of Karst Geological Conditions and Pile Foundation Construction Methods** Xie Yongchun, Yan Jiong Hunan Road & Bridge Construction Group 16. **Development of the Self-Propelled Reverse Circulation Drilling Rig Model GFC-120** Zhang Xikun, Song Qiufeng Hebei Institute of Construction Exploration & Research, No. 58 Jianhua South Street, Shijiazhuang 17. **Discussion on Temperature Control Techniques for Large-Volume Concrete** Li Ziquan Hebei Institute of Construction Exploration & Research, No. 58 Jianhua South Street, Shijiazhuang, 050031 18. **Prevention and Remediation of Accidents in Impact Bored Pile Construction in Karst Regions** Zhao Jianqiu Hebei Institute of Construction Exploration & Research, No. 58 Jianhua South Street, Shijiazhuang 19. **Summary of Construction Experience for Rock-Embedded Bored Piles in Areas with Developed Karst Features** Li Chenyan, Zhang Peng Hebei Institute of Construction Exploration & Research, No. 58 Jianhua South Street, Shijiazhuang, 050031 20. **Calculation Method for Settlement Curves (σ—y) of Sutong Bridge Bored Piles** Shangguan Xingjiang, Jiang Wei (East China Jiaotong University) 21. **Load-Bearing Capacity Analysis of Sutong Bridge Test Piles** Sutong Bridge Construction Command 22. **Sutong Bridge Bored Pile Construction Platforms** China Communications Second Navigation Engineering Bureau, China Communications Second Highway Engineering Bureau 23. **Construction of Ultra-Long Bored Piles for the Sutong Bridge** China Communications Second Navigation Engineering Bureau, China Communications Second Highway Engineering Bureau

2013-08-26

The Ministry of Railways will receive over 200 billion yuan in financing support, while China South and China North Locomotives have secured tens of billions in outstanding payments.

The Ministry of Railways will soon receive over 200 billion yuan in financing support, which will help with debt repayment, advance key projects, and optimize and refine accompanying initiatives. Thanks to government backing, the railway sector—previously grappling with severe funding challenges—will see a significant easing of its financial strain.

2013-08-26