China Railway Construction Heavy Industry applies for patent related to TBM gripper shoe positioning, automatic TBM gripper shoe positioning, improving accuracy and positioning efficiency

March 21 News, the State Intellectual Property Office’s information shows that China Railway Construction Heavy Industry Group Co., Ltd. has applied for a patent titled “A TBM Shoe Support Positioning Method, Electronic Device, Storage Medium, and Program Product.” The application publication number is CN121675924A, the application number is CN202511906466.2, the publication date is March 17, 2026, and the application date is December 16, 2025. The inventors are Hou Kunzhou, Yang Zhongliang, Ren Sainan, Huang Chunxia, Liu Hongliang, Zhang Bingfeng, and Fang Siyuan. The patent agency is Beijing Tongli Juncheng Intellectual Property Agency Co., Ltd., with patent agent Wang Rui. The classification codes are E21D9/11, E21D9/10, E21D11/18, E21F17/18.

Patent Abstract: The embodiment provided in this application relates to a TBM shoe support positioning method, electronic device, storage medium, and program product, involving tunnel boring machine technology. It automatically triggers when the advance cylinder stroke reaches a preset maximum threshold, eliminating the need for manual judgment of the step change timing. It automatically acquires the buffer box oil cylinder stroke and controls the advance cylinder to retract to a preset minimum threshold, while real-time collecting the distance data between the shoe support and the tunnel wall. This avoids subjective and lagging issues of manual data observation. Based on the distance data, it automatically determines whether the steel arch frame exists and its specific position, without manual trial-and-error troubleshooting. Combining the buffer box oil cylinder stroke and the steel arch frame status, the system automatically calculates the target stroke of the advance cylinder, the target tilt angle of the shoe support, and the target swing angle of the shoe support oil cylinder, removing reliance on personnel’s technical experience. Finally, it automatically controls each component to execute correctly to avoid the steel arch frame, improving positioning accuracy and solving the problem of low efficiency in TBM shoe support positioning.

China Railway Construction Heavy Industry was established on November 23, 2006, and listed on the Shanghai Stock Exchange on June 22, 2021. Its registered and office address is in Changsha, Hunan Province. It is a leading domestic high-end equipment manufacturing enterprise, with core businesses including tunneling machines and related equipment, possessing full industry chain and technological innovation advantages.

The company’s Shenwan industry classification is Machinery Equipment - Engineering Machinery - Complete Engineering Machinery, involving concepts such as railway infrastructure, government holding, and state-owned enterprise reform. Its main business includes design, R&D, manufacturing, sales, leasing, and services for tunneling equipment, rail transit equipment, and specialized professional equipment.

In 2025, China Railway Construction Heavy Industry achieved revenue of 10.045 billion yuan, ranking second in the industry, behind the first-ranked Shantui Co., Ltd. with 14.62 billion yuan. The industry average and median are both 12.33 billion yuan. In main business, industrial manufacturing accounted for 9.972 billion yuan, 99.27%; others (supplementary) 72.84 million yuan, 0.73%. Net profit in 2025 was 1.483 billion yuan, ranking first in the industry, with Shantui second at 1.214 billion yuan, and the industry average and median both at 1.349 billion yuan.

Recent patent applications by China Railway Construction Heavy Industry are as follows:

(Note: The table continues with additional patents listed similarly.)

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