13
2026-10
Technical Review of Slurry Pressure Balance Shield
Abstract: Slurry Pressure Balance Shield (SPB) represents a core type of closed‑face shield machine, which is widely adopted in tunnel engineering projects constructed in strata with high groundwater pressure and high permeability. This paper illustrates the working principle of SPB shields. Two major technical routes are classified according to pressure regulation modes: the direct‑control type (Japanese design) and the indirect air‑cushion control type (German design). A comparison is conducted regarding control logic, pressure stability and stratum adaptability between the two machine types. The excavation‑face stabilization mechanism governed by the coupling effect between filter cake and slurry pressure is analyzed. Technical comparison with Earth Pressure Balance (EPB) shields is also performed, providing references for shield machine type selection and construction‑technology research. 【This article is compiled for popular science purposes in the industry. Part of the technical data refers to publicly available professional literature.】
2026-10-13
22
2026-09
Main Composition and Technical Characteristics of Earth Pressure Balance Shield Machine
Abstract: The earth pressure balance (EPB) shield is mainstream equipment for urban tunnel construction. This article sorts out the composition and technical features of core systems of the EPB shield, including cutterhead, soil conditioning, muck‑removal conveying, grouting & sealing, guidance and monitoring. It analyzes component functions and selection points under various working conditions for industry‑wide technical exchange. 【This article is compiled for popular science purposes in the industry. Part of the technical data refers to publicly available professional literature.】
2026-09-22
02
2026-03
Abstract:With the steady advancement of global underground infrastructure construction, the wear-resistant material technology of shield tunneling machine tools is accelerating iteration and upgrading. Its performance level directly determines the operational efficiency of shield equipment and the control effect of the whole life cycle cost of projects. Currently, the innovation of wear-resistant materials for shield tunneling machine tools presents three core development directions: composite diversification, intelligent technology integration, and green remanufacturing, which will continue to promote the upgrading and improvement of tool products towards high performance and low carbonization.
2026-03-02
30
2026-01
The domestic infrastructure sector kicked off 2026 with robust prosperity. Fueled by the dual support of policies and funding, major underground projects have been intensively launched, driving a surge in demand for shield tunneling equipment. This has in turn unleashed definite growth potential for upstream consumable sectors such as wear-resistant materials and seals. With the expansion of application scenarios and breakthroughs in overseas exports, the industrial chain synergy effect has become increasingly prominent, ushering the industry into an era of value revaluation and high-quality development opportunities.
2026-01-30
12
2026-01
World's longest expressway tunnel opens to traffic in Xinjiang
China Daily Online：An aerial drone photo taken on Dec 20, 2025 shows a view of Urumqi-Yuli Expressway in Northwest China's Xinjiang Uygur autonomous region.
2026-01-12
24
2018-11
Abstract: Mr. Chao Huanqing, Vice Chairman and Chairman of Luoyang Jiujiu Technology Co., Ltd., provided several explanations regarding the amendments to the Articles of Association. Based on the feedback received on the amendments to the Articles of Association, the Supervisory Board was elected. Newly appointed Chairman of the Supervisory Board, Mr. Yang Jingrui, delivered a statement outlining the duties, tasks, and scope of authority of the Supervisory Board.
2018-11-24
23
2018-11
On November 16, the "2018 Membership Conference of the Shield Tunneling Remanufacturing Innovation Strategic Alliance" was grandly held in Guangzhou.
2018-11-23
06
2016-01
China Railway Equipment once again stuns the world.
On December 25, the world's largest rectangular pipe jacking machine with a large cross-section, "Kaotuo," independently developed and manufactured by China Railway Engineering Equipment Group Co., Ltd., rolled off the production line at Dalian Qianyi Manufacturing Base. Luoyang Jiujiu Technology Co., Ltd. also contributed to the project by participating in its technical research and development efforts.
2016-01-06
28
2015-12
Qiongzhou Strait Cross-Sea Bridge
The "Qiongzhou Strait Cross-Sea Engineering Planning Study Report," jointly prepared by the Ministry of Transport, the Ministry of Railways, and the provinces of Guangdong and Hainan, has now been completed. The report identifies the construction of a combined road and rail bridge connecting Denglujiao in Xuwens County, Guangdong Province, to Daolunjiao in Chengmai County, Hainan Province, as the preferred solution for the Qiongzhou Strait cross-sea project. The bridge’s offshore section will span 26.3 kilometers—making it the second-longest bridge in the world, behind only the newly completed Hangzhou Bay Bridge.
2015-12-28
26
2013-08
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
NEWS
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