oem Reinforced steel wire sealing brush customize-Chenxing

Safeguard every meter of tunneling.

We have an independent laboratory that, through continuous experimentation—from the selection of raw materials to semi-finished products and finally to finished goods—ensures the stability and reliability of product quality.

Customized complete tail seal solutions for you.

Our products are currently used in 63 tunneling projects with diameters exceeding 10 meters.

Advance safely together with the tunnel pioneers.

Over 20 years, more than 800 projects, over 1.2 million brush strokes—zero accident rate!

Professional Customization Services

Over 3,000 experimental data points—design and optimize safer tail brushes tailored to your equipment model and formation requirements.

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About Chenxing

We are a specialized, innovative, and high-tech enterprise focused on the R&D, production, and sales of shield tunneling machine cutterhead sealing brushes.

The manufacturing plant—Langfang Chenxing Machinery Co.,ltd.—is located in the Gu'an Industrial Park, Langfang City, Hebei Province; the sales company—Beijing Qing’an Sade Technology Co.,ltd.—is located in Daxing District, Beijing.

2002 year

Company established

3000 +time

Cumulative experiment

800 +home

Cumulative number of served customers

1200000 +set

Cumulative production of shield tail brushes

View details +

Product Center

Our core product—the tail seal brush for tunnel boring machines—is the “safety guardian” that ensures the smooth operation of tunnel boring machines in complex geological conditions.

Steel wire brush

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Steel plate brush

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Composite brush

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Grouting stopper

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Project Performance

Our products have been widely used in urban subways, railway and highway tunnels, cross-sea and cross-river tunnels, municipal utility tunnels, hydraulic engineering projects, and other fields. Our customers span major cities across China and we also export our products to global markets including the Americas, Europe, Southeast Asia, and the Middle East. We have established strong partnerships with numerous large-scale construction groups and tunnel-boring machine manufacturers.

Chongtai Yangtze River Tunnel

The “Four World’s Firsts” have set a new global benchmark for high-speed railway tunnels. The tunnel boring machine (TBM) has successfully completed a single-heading tunnel crossing beneath the Yangtze River, spanning a distance of 11.3255 kilometers—the longest single-heading tunnel ever excavated worldwide. The tunnel utilizes the world’s largest-diameter high-speed railway TBM, the “Linghang,” with a maximum cutterhead diameter of 15.4 meters, creating an excavation cross-section of 186 square meters—equivalent to the height of a five-story building. The tunnel plunges as deep as 89 meters below the riverbed, enduring an ultra-high water pressure of 1.02 megapascals (equivalent to 10 atmospheres). This makes it the deepest and highest-pressure underwater tunnel in the Yangtze River basin. The project has also established a world record for high-speed railway tunnels in the 15-meter class, achieving a monthly advance rate of 718 meters—and averaging 600 meters per month. With its “strategic-level value” at its core, this project not only overcame world-class engineering challenges such as ultra-long single-heading tunneling, ultra-high water pressure, and complex geological conditions, but also achieved breakthroughs across the board in engineering technology, construction management, and ecological protection.

Zhuzhao High-Speed Railway, Jiangmen to Pearl River Delta Hub Airport Section, JJZQ-4 Contract, Guifengshan Tunnel Project

During construction, a record was set for the TBM’s daily advance of 21 meters and monthly advance of 395 meters in hard rock strata with an ultra-large diameter. Moreover, through industry-academia-research collaboration, the project successfully overcame the challenge of lacking prior experience in constructing ultra-large-diameter dual-mode shield tunnels, providing a benchmark for similar projects.

Zhuhai Tunnel Project

The construction environment is complex and the project’s difficulty ranks among the highest in China. According to the Zhuhai Municipal People’s Government: This project is an exceptionally challenging, ultra-large-diameter underwater shield tunnel project in China. The tunnel boring machine (TBM) must traverse a composite geological stratum that is soft above and hard below over a distance of more than 800 meters—a stretch that represents the longest bedrock section ever encountered in a Chinese underwater shield tunnel. At the same time, the TBM will pass very closely beneath numerous existing structures and must also go under two water supply pipelines serving Macao. The clearance between the top of the tunnel and the bottom of the pipelines is only 7.08 meters, making the construction highly risky.

Wen Yi Road (Zijin Port Interchange — Jingchang Avenue)

The 2,200-meter tunnel section using a shield machine needs to pass under several critical infrastructure facilities, including the Qiandao Lake water supply pipeline, the Hangzhou Ring Expressway, a high-pressure gas pipeline, and the subway express line tunnel. The northern tunnel runs within less than 10 meters horizontally from the airport express line and extends for a parallel distance of up to 1,200 meters. During construction, vibration and settlement isolation technologies were employed, ensuring that the settlement of the airport express line remained below 8 millimeters and thereby guaranteeing its safe operation.

Partner

China Communications Construction Company

+86 316 5927222

We look forward to collaborating with you to jointly build a solid foundation for tunnel and underground space development projects.

Blog

Shanghai Airport Link Line Large-Diameter Shield Tunnel Breakthrough in Soft Soil Strata, Shield Tail Brush Ensures Safe Long-Distance Shield Tunneling

2026-09-03

Shield Tail Brush is designed for TBM sealing applications, providing reliable protection against slurry and water ingress. Its durable structure supports stable sealing performance during demanding tunnel construction.

Learn more

Jinan Metro Line 4 Tunnel Breakthrough in Complex Water-Rich Sand Layer, Tail Seal Brush Ensures Safe Long-Distance Shield Tunneling

2026-08-27

Tail seal brush is an essential sealing component used in tunnel boring machines to improve sealing performance during underground construction.

Learn more

TBM Tail Sealing Brush Technology Supports Ultra-Large Diameter Shield Tunneling Projects with Reliable Sealing Performance

2026-08-20

TBM tail sealing brush is a key component used in tunnel boring machines to provide effective sealing performance during underground construction.

Learn more

Contact Information

Address: No. 1 Tongsheng Road, South Area, Industrial Park, Gu'an County, Langfang City, Hebei Province

Phone: +86 3165927222

Email: chenxing@cxtunnel.com

Fax: +8603165927333

Mobile: +8615333366444

Leave a message for inquiry

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