I. Pre-Operation Preventive Measures

1. Ground Bearing Capacity Inspection

• Use a portable penetrometer (CBR < 3 requires treatment).

• Quick field test:
  ✓ If standing/jumping causes >2 cm sinking → No direct operation!
  ✓ Rebar insertion test (requires >50 kg force at 1m depth).

2. Equipment Modifications
Tire Upgrades:

Counterweight Adjustment:
✓ Remove front counterweights (reduce front axle load).
✓ Add rear balance weights (prevent nose-up tipping).

3. Essential Tools

• Anti-sink mats (*aluminum, 8t/m² capacity*).

• On-board air jack (for quick lifting if stuck).

II. Operational Techniques

1. Travel Control

• Move in straight lines (turning increases stuck risk by 300%).

• "Frog leap" method: Use the boom to assist movement.

2. Optimal Working Posture

• Boom angle: 55-65°.

• Stick fully extended.

• Bucket support technique:
  ✓ Dig bucket teeth ≥30 cm into ground.
  ✓ Form tripod support (two wheels + bucket).

3. Real-Time Monitoring

III. Emergency Recovery Plans

1. Stuck Level 1 (Tires Half-Buried)
✓ Bucket support + anti-sink mats.
✓ Slow reverse (avoid sudden throttle).

2. Stuck Level 2 (Undercarriage Touching Ground)
✓ Use rescue wedges (30° incline).
✓ External hydraulic pump assist.

3. Professional Recovery Tools

• Electric winch (5t capacity recommended).

• Inflatable lifting bags (8t lift force).

IV. Special Condition Solutions

1. Marshland Operations

• Modifications:
  ✓ Install pontoon track kits (3× more ground contact).
  ✓ Redistribute weight (rear axle ≥60%).

• Daily limit: ≤4 hours (avoid structural overload).

2. Rainy Season Work

• Dig drainage trenches (slope ≥5%).

• Lay gravel base (≥20 cm thick).

• Must-have features:
  ✓ Central Tire Inflation System (CTIS).
  ✓ Waterproof electrical connectors.

V. Maintenance & Prevention

Daily Checklist

• Tire tread depth (replace if <5mm).

• Wheel hub seals (regrease after water exposure).

• Hydraulic cylinder boots (50% lifespan loss if damaged).

Lubrication Upgrade

• Use waterproof grease (NLGI Grade 2).

• Reduce bearing lubrication intervals by 50%.

Case Study:
A riverbank project cut stuck incidents from 17% to 2% using wide tires + real-time monitoring, saving ¥80,000/year per machine.

Industry Standard (JGJ/T 180-2009):

• Mandatory auxiliary support on ground <80 kPa bearing capacity.

• Always carry ≥2 anti-sink solutions for varying conditions.

Pro Tip: For soft ground, prevention beats recovery—plan ahead! 🚜💨