Slurry Loss Emergency Response Plan
An emergency response flow for sudden slurry loss and collapse warning signs — plugged within 2 hours and back to work fast.
Solution overview
- Application methods
- 旋挖灌注桩施工 / 非开挖管线施工 / 钻探与钻井施工
- Problem type
- Slurry loss
Scenario and construction challenges
Sudden slurry loss in pipe jacking and drilling: escaping slurry triggers surface settlement or even collapse, so the leak must be located, plugged and wall protection restored in hours.
Challenge 1Hidden leak
Loss channels run underground — their location and path cannot be seen directly.
Challenge 2Clock ticking
A growing leak leads to surface collapse, leaving a response window measured in hours.
Challenge 3Secondary collapse
Any delay hollows out the ground and invites secondary collapse and accidents.
Complete solution
Each scheme pairs materials with dosing; the table below lists material, role and ratio per step.
| Stage | Material | Function | Ratio / dosage | Working condition | Scope |
|---|---|---|---|---|---|
| Plug | Rapid-set loss-circulation agent | Seal the leak point fast | Trial-mixed per leak | Sudden loss with settlement warning signs | Sand / backfill zones with a located leak |
| Wall protection | PAM-S concentrated slurry | Re-film and restore protection | 1:200 | After plugging, protection must be restored | Pipe-jacking / drilled bore walls |
| Pressure | BENT-N thick slurry | Backfill cavities, steady pressure | 10%–12% | Falling hole level requiring pressure support | Backfilling loss channels |
| Monitor | Settlement monitoring | Track settlement and returns | Every 2 hours | Throughout the response | Roads and utilities above the crossing |
Delivered results
Construction schematic & site photos
Use the schematic and site photos to follow the process and slurry flow; final parameters follow on-site trial results.
Construction schematic
Site photos
Related cases
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