CRCHI Creates World Record - Deploys 52 TBMs at Guangzhou Metro Construction
The construction project of Guangzhou Metro Line 18/22 - the largest metro investment in China - has attracted much attention. CRCHI has tailored 52 φ8.8m EPB/Slurry TBMs for the project, creating a world record of the largest TBM construction group
Managing Geological Complexity in BVC and PAC of Tehri PSP
Tehri hydroelectric project is located on the left bank of River Bhagirathi in the state of Uttarakhand. Tehri Pumped Storage Project (PSP) comprising 4 reversible pump-turbine units of 250 MW each, involves construction of an underground Machine Hall
New-Gen DRAMIX® Fiber Reinforced Precast Segment Allows Eco Efficiency & Performance
As mentioned in the fib bulletin 83 on Fibre Reinforced Precast Segment: for sustainable use of structural concrete, environmental and mechanical performances of concrete structures must have the same importance. Through sufficiently high mechanical
Breakthrough by two 15.01m Slurry TBMs of CRCHI in two projects
On March 12th 2023, the breakthrough by the largest slurry TBM in China’s Hunan Province marked the completion of the right line tunneling of the Xiangya Road river-crossing tunnel in Changsha City. It represents the largest diameter shield machine tunnel
Sela Tunnel Project - Overcoming The Impossible
The responsibility for construction and maintenance of Balipara-Charduar-Tawang (BCT) Road has been entrusted to Border Roads Organisation (BRO). The 317.520 km long road connects West Kameng and Tawang districts of Arunachal Pradesh to the rest
Slurry TBM ‘Channel Express’ launched by CRCHI for working in Water Supply Tunnels in Singapore
On February 1, 2023, CRCHI attended the launching ceremony of its Slurry TBM ‘Channel Express’. It will be used in the construction of key water supply tunnel project TWRP Pipeline Contract 1 in Singapore where it will bore 1.6km with the inner diameter
China’s Largest TBM - With Panda Face Emerges From Tunnel
On 12 December 2022 ‘Jinxiu’ - China’s largest EPB TBM developed by CRCHI - marked the first smooth breakthrough of the Jinxiu Tunnel, a key control project of the Chengdu-Zigong high-speed railway. Jinxiu is China’s largest diameter EPB TBM with
STRUCINSPECT Technology Transforms Inspection of Los Angeles Metro Tunnel Network
With drones, multispectral optics, and AI, Austrian joint venture transforms tunnel inspection in the US. The world’s first infrastructure lifecycle hub taps the rapidly growing global market for infrastructure inspections. The remarkable thing about
CRCHI showcases total solutions of Underground Engineering Equipment
China Railway Construction Heavy Industry Corporation Limited (CRCHI) brought the whole industry chain products and solutions to bauma CONEXPO INDIA 2023. CRCHI exhibited TBMs, drilling and blasting method equipment, cotton pickers, and other
Sandvik sets up new factory; hands over first ‘made in India’ tunnelling jumbo to KSR Group, Hyderabad
In a historic event held on 30th January, 2023 Sandvik proudly presented the key of the first ‘made in India’ DT820 Tunnelling Jumbo to Mrs. and Mr. Koneru of KSR Group, Hyderabad. The machine was rolled out from Sandvik’s newly set-up state-of-the-art
CRCHI Slurry TBM ‘Avni’ Helps Make a Breakthrough in Bangalore Metro Project
The 6.6m Slurry TBM developed by CRCHI exited the tunnel at Vellara Station, Phase II of Bangalore Metro in India, becoming the first TBM to complete the breakthrough for the whole line of the project. Avni is one of the four slurry TBMs provided by CRCHI
The Bolter Miner - A Technology Revolution for Roadway Development in Underground Coal Mining
In India, coal is still the primary source of energy; over the past few years, there has been quantum jump in coal production level, but it was mostly due to the high percentage share from the opencast sector. The country is witnessing a fast
CRCHI emerges as provider of total underground engineering equipment and solutions
China Railway Construction Heavy Industry Corporation Limited (CRCHI) showcased its comprehensive range of equipment and products at bauma that included solutions for the whole industry chain in the field of
Herrenknecht AG wins bauma Innovation Award 2022 for development of continuous tunnelling
Herrenknecht AG won the highly coveted award bauma Innovation Award 2022 in the category “Machine Technology” for the new development of continuous tunnelling. The award was given for the next innovation boost in the mechanized
The Genesis of Underground Engineering
Regardless of the tunnelling technology used, tunnel designers decide the future success or failure at an early project stage. In fact, designers are the real managers of tunnel construction. The choice of design together with selected contract model is
Managing Geological Complexity in BVC and PAC of Tehri PSP, India - A case study
Tehri hydroelectric project is located on the left bank of River Bhagirathi in the state of Uttarakhand. Tehri Pumped Storage Project (PSP) comprising 4 Nos of reversible pump-turbine units of 250 MW each, involves construction of an underground Machine Hall
TBM driving under low overburden by adopting innovative methodology
TBM mining in urban areas particularly under low overburden (less than 0.5D, D = tunnel Dia) is a big challenge to design team as well as execution team. While working in a Lucknow metro project, the metro authorities encountered a stretch where TBM had to cross
Tunnel Ventilation System Basic Concepts and Designing Principles
The term ventilation combines several functions such as smoke extraction, pollution ventilation, and ventilation for environmental purpose. The design of a ventilation system is usually based on three scenarios: During construction: to provide external
CRCHI Mega Slurry TBM ‘Jinghua’ Assists the First Tunnel Section Breakthrough of Beijing East Sixth Ring Road Reconstruction Project
In September 2022, the Beijing East Sixth Ring Road Reconstruction Project reported another good news: the CRCHI mega slurry TBM ‘Jinghua’ smoothly reached the intermediate air shaft, marking the project’s achievement. The maximum excavation diameter
TERRATEC EPBMs ready to tackle Kanpur Metro’s 1st Underground Section in India
TERRATEC celebrated the successful site acceptance testing of two 6.52m diameter Earth Pressure Balance Tunnel Boring Machines (EPBMs) for Uttar Pradesh Metro Rail Corporation (UPMRC) for Corridor-1 of Kanpur MRTS Project (KNPCC-05) in India. The two 6.52m
Tunnelling Asia 2022 - International Conference on Underground Space
Tunnelling Asia 2022, organized by TAI, which took place in Mumbai during 27th and 28th June, saw a huge gathering of delegates/engineers from all around the world. The theme of the conference: ‘Underground Space: Need of the Day’ focused on
Hydraulic Heave Failure Mitigation Approach for the construction of the Deepest Metro Ventilation and Egress Shaft in India
Dr. Lakshmana Rao Mantri, Assistant General Manager (Designs), and Satya Narayan Kunwar, Project Manager, AFCONS Infrastructure Ltd. , discuss the design and construction challenges of constructing India’s deepest underground metro ventilation
Creating Zero-Carbon Tunnels
Despite a daunting timeline set by the Paris Accord, zero-carbon tunnels are within reach, provided the right solutions are implemented. Er. Vasileios (Bill) Paoulos, CMT, CMRL, L&T Construction Heavy Civil Infrastructure
Readily Biodegradable Soil Conditioning Foaming Agents - A New Technology
Mike A. Sposetti, Global Technical Manager TBM, Underground Construction, Master Builders Solution, Malta, and Manish Gautam, Product Segment Manager - UGC TBM Tunneling Projects, Master Builders Solution, Mumbai, discuss how readily biodegradable
Geotechnical challenges in Tunneling in Himalayas
G.B.Nagendra. General Manager - Projects, Konkan Railway Corporation, gives a first-hand experience of the adverse geological conditions encountered during construction of Tunnel T5 of the Katra-Dharam Section of the USBRL Project and the solutions
Cut & Cover Metro Stations & Other Underground Structures
Vinay Gupta, Director & CEO, Tandon Consultants, discusses the intricacies and issues in the construction of underground metro stations including strata survey during structural design, selection of methods and techniques of construction, traffic management
Importance of Pre-Injections Before Tunnel Front Advancement
Pre-injections or injections ahead of the excavation face in underground construction can, in many situations, offer significant advantages. This is particularly the case in difficult ground conditions like severe water ingress or mechanically
The Next-Gen Sandvik Tunnelling Jumbo Drills offer best-in-class operator comfort and safety
Sandvik's fully automatic, DT 922i and semi-automatic, DT 821C jumbo drills are enabling Max Infra to attain lower drilling costs per meter, with higher machine availability during the ongoing construction of the access tunnel
Tunnelling & Underground Projects Sharing Risks & Responsibilities
Rakesh Kumar Khali, Project Director-Hydro, Hindustan Construction Company Limited, Mumbai, describes the type of risks involved in underground construction projects, gives important guidelines to the tendering authorities and contractors
Recovery & Recycling of Excavated Tunnel Waste
Rock excavated in an average tunneling project is often considered waste and mostly finds its way to a landfill. Depending on the geology and excavation method used, the extracted material can have significant quality deviations
