国际会议汇报英文.pptx

New words
Shaft: 通风井
Grouting: 灌浆，给…灌浆
High-pressure jet grouting piles(HJGP): 高压喷射灌浆柱
Silty clay: 粉质黏土
Tunnel boring machine(TBM): 隧道掘进机
Gush: 涌出
Double-spool: 双轴
Outline
PART 1 Introduction
PART 2 Method
PART 3 Results
PART 4 Conclusion
Introduction
1
Background
Shield tunneling technology
Advantages
Disadvantages
1. High level of mechanization
1. Large scale
2. Fast progression of tunneling works
2. Long duration
3. Lesser environmental impact
3. Complex technical issues
Objective
The primary aims of this study were to investigate:
Overall Process Safety Management (OPSM) in tunnel construction.
i
iii
A real-time update of both environmental parameters and control measures.
ii
A more reasonable solution for the waterproofing and reinforcing works.
Project profile
Wuhan Yangtze Metro Tunnel (WYMT)
Characteristics:
Double-spool tunnel connecting two large cities
Two sets of ventilation shafts
A curve radius of 350m and an extremely close distance away from Yangtze River
4. Fine sandstone and silty clay
Method
2
Waterproofing
Ground freezing
Lowering of water level method
Reinforcing
1. The cement paste tends to be washed away by the flowing water, resulting in poor reinforcement.
A high-pressure jet grouting
Safety system design
2. No significant waterproofing results would be achieved due to the close proximity to the Yangtze River.
Safety system design
Ground heterog-eneity
Constru-ction methods
Soil structure interact-ion
Non-linear behavior of soils
Safety analysis
Systemic safety
Economic requirements
Numerical simulation
ANSYS