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2023 | Buch

Key Technologies for Safety Construction of Mined Subsea Tunnels


Über dieses Buch

This book puts forward a technological system for the construction of subsea tunnel using drilling and blasting method. Taking the water-induced disaster as the core risk, the safety guarantee system for large cross-sectional subsea tunnels is established. The composite grouting technology referred to ground reinforcement and water plugging is established, which breaks through the technical bottleneck of subsea tunnel construction in highly permeable strata. The process control theory based on water inrush mechanism is created, which gets rid of the over-dependence on engineering experience for disaster control of submarine tunnel. An active control waterproof drainage system based on the synergy of reinforcement ring and support system is invented to solve the contradiction between the control of water displacement and water pressure. The above-mentioned achievements have been successfully applied in the first three large cross-sectional subsea tunnels in China, and have played a key role in the construction safety. The proposed technological system can improve the overall construction level of subsea tunnel, which can provide reference for the design and construction of subsea tunnels, especially for those crossing through weakness zones.


Chapter 1. An Overview of Subsea Tunnel Construction
As we know that the earth’s oceans cover a whopping 360 million square kilometers or about 71% of the planet’s total area. The Earth is segmented by the ocean into several continents, creating barriers to transportation and cultural differences between different continents. However, with the development of global economic integration and the deepening of life and economic ties between countries and regions of the world, it is imperative to solve the problem of barriers arising from oceans.
Dingli Zhang
Chapter 2. Safety Risk Control System Throughout the Lifecycle of Subsea Tunnels
The lifecycle of subsea tunnels faces great technical challenges and safety risks owing to the location of the tunnels in an infinite marine environment and the extreme difficulty of accurate geological investigations.
Dingli Zhang
Chapter 3. Water Inrush Mechanism and Evolution in Subsea Tunnels
As a large-scale, high-risk project, the core issues concerning subsea tunnels are the control of water inrush during the construction and management of water seepage and drainage during operations, which is the primary function of subsea tunnel construction.
Dingli Zhang
Chapter 4. Compound-Grouting Technology and Its Application in Subsea Tunnel-Surrounding Rock
Grouting technology is widely used to achieve stable control of the subsea tunnel constructed in unfavorable geological conditions. This technology plays a vital role in engineering safety and quality assurance and strongly promotes the continuous progress and rapid development of underwater tunnels and water-rich ground tunnel construction technology.
Dingli Zhang
Chapter 5. Elaborate Process Control Technology for Unfavorable Geological Sections of Subsea Tunnels
Crossing the unfavorable geological body and ground interface is a control project in subsea tunnel construction. The stability of an unfavorable geological body and its connectivity with seawater affects the technical issues and risks associated with tunnel construction and controls parameters, such as tunnel buried depth. Regarding the engineering response, the following factors characterize the unfavorable geological section: ① high risk—it is prone to the occurrence of catastrophic accidents, such as water inrush; ② slow construction progress—it requires complex construction methods, such as construction in the water environment; ③ special support and pre-reinforcement means are required; ④ it requires special waterproof and drainage scheme and technical measures. Therefore, unfavorable geological sections are imperative in subsea tunnels’ planning, design, construction, and operation phases, sometimes even affecting tunnel scheme feasibility.
Dingli Zhang
Chapter 6. Active Control Waterproof and Drainage System and Structural Design Method for Subsea Tunnels
In the past, drainage methods of free discharge or drainage-based waterproofs were commonly used in mountain tunnel projects, which even caused ecological disasters in certain environmentally fragile areas.
Dingli Zhang
Key Technologies for Safety Construction of Mined Subsea Tunnels
verfasst von
Dingli Zhang
Springer Nature Singapore
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