Project Overview
A major infrastructure development in Bangkok, Thailand required the construction of a 45-meter deep diaphragm wall for a new metro station. The challenging soil conditions, comprising alternating layers of stiff clay, dense sand, and medium-hard rock, demanded cutting-edge trench cutting technology capable of handling complex geological formations while maintaining high precision and efficiency.
The Challenge
The project presented several critical challenges:
- Deep excavation requirements: 45-meter wall depth with tight verticality tolerances (≤1/500)
- Variable soil conditions: Mixed geology including hard rock layers up to 80 MPa compressive strength
- Urban environment constraints: Limited working space in densely populated area
- Strict environmental standards: Noise and vibration control essential for nearby residential zones
Solution Provided
APIE FOUNDATION EQUIPMENT delivered a state-of-the-art hydraulic trench cutter system featuring:
- Heavy-duty cutter frame with two rotating cutter drums
- High-performance cutter wheels equipped with tungsten carbide tips
- Advanced hydraulic system delivering 250kW cutting power
- Real-time monitoring system for depth, inclination, and cutting parameters
- Integrated guidance system ensuring precise verticality control
Execution and Results
The trench cutter operated continuously for 12 weeks, achieving exceptional results:
| Performance Metrics | Results |
|---|---|
| Average daily progress | 25-30 linear meters |
| Verticality deviation | Max 0.08% (well below 0.2% specification) |
| Wall thickness consistency | 1200mm ±15mm |
| Noise levels | <75dB at 15m distance |
| Project completion | 10 days ahead of schedule |
Key Benefits Delivered
- Superior cutting efficiency – The trench cutter’s dual-drum design enabled simultaneous cutting of both wall faces, reducing operation time by 35% compared to conventional grab systems.
- Excellent rock penetration capability – Successfully navigated through hard rock formations without requiring pre-drilling, significantly reducing overall project costs.
- Minimal environmental impact – Advanced hydraulic system and sound-enclosed design kept noise and vibration levels within strict urban construction limits.
- Exceptional wall quality – High-precision control system ensured consistently smooth wall surfaces, eliminating the need for extensive post-construction remediation.