# World's Largest-Diameter Double-Shield Hard-Rock TBM Rolls Off the Production Line in Xinjin, Chengdu

- Link: https://www.thailand-business-news.com/pr-news/worlds-largest-diameter-double-shield-hard-rock-tbm-rolls-off-the-production-line-in-xinjin-chengdu
- Published: 2026-10-30T07:30:00+07:00
- Author: MarketersMEDIA Newswire

_Engineering milestone offers a view into southern Chengdu’s steadily developing
advanced manufacturing ecosystem_

China, October 30, 2026 — _On September 24, 2026, the Yuexi tunnel boring machine(
TBM) officially rolled off the production line at China Railway Hi-Tech Intelligent
Equipment Base in Xinjin, Chengdu. With an excavation diameter of 13.01 meters, 
the machine is the world’s largest-diameter double-shield hard-rock TBM to have 
rolled off the production line to date. Jointly developed by Shudao Investment Group
Co., Ltd. (Shudao Group) and China Railway Engineering Equipment Group Co., Ltd.(
CREC Equipment), it will be deployed to excavate the Yuexi Tunnel on the Jinkouhe–
Xichang Expressway, which runs from Leshan’s Jinkouhe District to Liangshan’s Xichang
City in Sichuan Province. Beyond its engineering specifications, this landmark rollout
offers a clear lens into how Xinjin’s decades-long industrial accumulation and targeted
business support have shaped the district into a growth hub for high-end manufacturing
in western China._

![](https://storage.googleapis.com/mmstudio-images/gallery/QMDU0YjNqlfOqfBZnztCFUnAgIL2/
89207749-1793242021-1.jpg)

Yuexi Tunnel General Layout Plan

_The Yuexi TBM stands out not only for its record-breaking size, but for its tailored
design addressing one of China’s most challenging geological environments. Stretching
through the mountainous terrain of southwest Sichuan, the Yuexi Tunnel faces complex
conditions including high ground stress and fractured rock formations. Its double-
shield structure enables simultaneous rock breaking, muck removal and segment lining,
improving construction efficiency. Key parts and components of the machine are domestically
produced. The project also marks deep collaboration between local engineering demand
and domestic equipment R&D: Shudao Group brought frontline geological expertise 
from Sichuan’s mountain infrastructure projects, while CREC Equipment contributed
core TBM research and development capabilities. The result is a custom-built large-
diameter tunnelling machine explicitly adapted to southwest China’s unique mountain
tunnel conditions, providing a Chinese practical solution for large-diameter tunnelling
equipment under similar complex geological conditions globally.That such a sophisticated
piece of heavy equipment was manufactured in Xinjin is no coincidence. Located at
the southern gateway of the Chengdu Plain with five rivers running through its territory,
Xinjin has long been a pioneer of private economic development in Sichuan, home 
to well-known private enterprises including the Hope Group. Over the years, the 
district’s three leading industries—green food, new energy and rail transit—have
continued to cluster and grow, while advanced equipment manufacturing and other 
emerging sectors have expanded alongside major projects. Leading players such as
CRRC Changchun Railway Vehicles Chengdu Co., Ltd., which supplies Chengdu’s metro
fleet, together with other major enterprises including CATL, have continuously consolidated
the district’s industrial foundation. This solid industrial heritage is fostering
a steadily improving local supply chain and a pool of skilled industrial talents,
laying a foundation for high-end equipment projects like the Yuexi TBM._

_Building on its solid industrial foundation, Xinjin’s core strength lies in its
ability to turn industrial concentration into tangible business collaboration. When
the China Railway Hi-Tech base began R&D and production of the Yuexi TBM, the district
government organized multiple targeted matchmaking events, connecting the equipment
manufacturer with local suppliers such as Hope Senlan. This model creates mutual
benefits: major projects from outside gain fast access to local supply chain resources,
while local enterprises unlock new business growth opportunities backed by leading
projects. For Xinjin, industrial agglomeration is not just a statistic—it is an 
operating mechanism that enables major projects to drive shared growth for local
businesses._

_Beyond supply chain connectivity, Xinjin has streamlined government services to
remove operational frictions for manufacturers. According to public reports, the
district has consolidated approval, planning and other administrative services into
its Enterprise Service Center, allowing companies to handle 293 business-related
matters in a one-stop manner entirely within the park. This on-site support enables
enterprises to focus on production and R&D rather than administrative procedures.
Financial support is equally accessible. Xinjin’s digital policy matching platform
automatically identifies applicable support policies for each enterprise and seamlessly
connects the application, review and disbursement processes. In 2025, the district
precisely disbursed over 360 million yuan in policy support funds, ensuring policy
benefits directly reach businesses._

_Support follows companies as they expand into global markets. Before the Yuexi 
TBM’s rollout, the Chuanshanjia No. 1 shield machine, manufactured at the same production
base, had been exported to Europe for a local water conservancy project. To support
this overseas expansion, Xinjin’s intellectual property service station provided
comprehensive patent analysis and overseas trademark portfolio assessment, helping
manufacturers protect their technology and build international brands. Logistics
channel support has kept pace. The Chengdu South Collection and Distribution Center
of the New International Land-Sea Trade Corridor (Western Route), located in Xinjin
Economic and Technological Development Zone, launched the inaugural Sichuan–Pinglu
Canal–Vietnam river-rail-sea intermodal transport service in September 2026, opening
a new southward sea route for local manufacturers of high-end equipment, rail transit
systems and new energy products. According to the operator’s estimates, the per-
container logistics cost on the rail segment is about 10% lower than that of the
traditional route of the New International Land-Sea Trade Corridor, helping Xinjin-
made products reach ASEAN markets efficiently. From intellectual property protection
to logistics channel support, these professional services beyond factory gates have
become a strong pillar for local manufacturers exploring global markets._

_The Yuexi TBM is more than just a landmark tunnelling machine—it is a microcosm
of Xinjin’s manufacturing ecosystem capabilities. What started as a pioneer of private
economic development has grown into a high-end equipment manufacturing hub with 
a steadily improving local supply chain, efficient government services and global
market support. As the world’s largest-diameter double-shield hard-rock TBM is set
to be deployed deep in Sichuan’s mountains, it also carries forward Xinjin’s development
trajectory: connecting local businesses with new opportunities, and turning regional
industrial potential into tangible competitiveness. For partners worldwide, Xinjin
represents not just a production location, but an industrial ecosystem where advanced
manufacturing continues to take shape and thrive._

Contact Info: 
Name: Wendy HeEmail: [Send Email](https://send.releasecontact.com/89207749)
Organization: The Xinjin District People’s GovernmentWebsite: [https://www.xinjin.gov.cn/xjxrmzf/index.shtml](https://www.xinjin.gov.cn/xjxrmzf/index.shtml)

Release ID: 89207749

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**Source** : [World's Largest-Diameter Double-Shield Hard-Rock TBM Rolls Off the Production Line in Xinjin, Chengdu](https://news.marketersmedia.com/worlds-largest-diameter-double-shield-hard-rock-tbm-rolls-off-the-production-line-in-xinjin-chengdu/89207749?rand=206000)

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