이슈 한눈에 보기
Earth Pressure Balance Tunnel Boring Machines (EPB TBMs) are utilized in the construction of rail tunnels, metropolitan subway systems, highway tunnels, and other projects where the tunnel will be constructed either partly or completely in soft soil.
In many tunnelling projects, a large amount of muck is generated. Bentonite-based drilling lubricants, lubricating foams, and other additives are used to maintain pressure on the over-burden and reduce friction on the large rotating cutting heads located at the front of the tunnel boring machines.
The amount of lubricant used depends on the geology being tunnelled through. The lubricant also facilitates the transport of the debris generated to the rear of the tunnel boring machine where it is transported by a conveyor system or mud car to the surface. When this waste arrives at the surface, it has the consistency of muck, which is often difficult and expensive to dispose of.
The process for muck disposal often looks like this:
- Specialized vacuum trucks transport the muck to a transfer station
- 톱밥과 같은 벌크제가 사용됩니다(일반적으로 슬러리를 50-200%까지 벌크화).
- 덤프트럭은 늘어난 폐기물을 최종 처리 장소로 운반합니다.
This means more trucks needed, more time wasted, higher greenhouse gas emissions and higher disposal costs incurred. Traditional methods can also result in waste with high pH, create corrosive and dangerous waste, and change waste classification.
메타플로 제품 개요
MetaFLO provides non-toxic inert solidification reagents that rapidly absorb water on-site and help waste pass the Paint Filter Test (PFT). They can be applied to muck generated by EPB TBMs in order to solidify waste more efficiently compared to traditional methods. Varying dosage is required based on the moisture content of the muck.
With MetaFLO, muck disposal is optimized:
- MetaFLO’s technology solidifies the slurry on-site
- The solidified slurry is transferred to dump trucks to be transported directly to the final disposal site.
Our solidification reagents can be applied at the surface, or at the source, using muck conveyor belts to begin the solidification process early—saving time and labour.
Treating 2500m3 of Tunnel Spoils - 17 lbs./gal waste material with: |
||||
MetaFLO |
톱밥 |
Lime |
Cement |
|
Total Weight of waste material (lbs.) |
11,220,000 | 11,220,000 | 11,220,000 | 11,220,000 |
Dosage (%) of Reagent |
0.2% | 30% | 5% | 10% |
Total Reagent (lbs.) |
22,440 | 3,366,000 | 561,000 | 1,122,000 |
Total Solidified Material weight (lbs.) |
11,244,440 | 14,586,000 | 11,781,000 | 12,342,000 |
Total volume of solidified material (M3) |
2520 | 19,275 | 2580 | 2840 |
MetaFLO Technologies can work with operations personnel to help put together a tailored and effective plan to address the challenges of dealing with muck generated by EPB TBMs.
운송 비용 대폭 절감
환경 및 안전 위험 최소화
지속 가능하고 효율적인 폐기물 관리
사례 연구
Find out how MetaFLO helped Eglinton strategically manage more than 100,000 tons of mud spoils in downtown Toronto. With a 0.2% w/w dose, our reagent provided a more reliable end product and required 66% less material than the competing solidification reagent used prior.