High-Rise Building Concrete Construction Scheme

 High-Rise Building Concrete Construction Scheme  

(Self-clibming Placing Boom + Trailer Pump System)  

Updated per Client Requirements

 1. Project Overview  

- Building Height: ≥150m  

- Structural System: Core tube + frame shear wall  

- Concrete Grade: C30–C60  

- Key Modifications Implemented:  

•  Per-floor climbing operation  
  
•  36m placer boom length  
  
• 32MPa pump pressure  
  

 2. Revised Equipment Configuration  

> Operational Adjustments:  

> - Climbing frequency: After each floor completion (Increased productivity)  

> - 36m boom coverage: 85% working radius = 30.6m effective reach  

> - Pump pressure calibrated to 32MPa operational ceiling  

> - Added boom stabilizers for extended 36m configuration  

 3. Modified Construction Sequence  

 Critical Process Updates:  

1. Climbing Procedure  

   - After each floor: Disengage wall attachments → Hydraulic lift → Re-anchor  

   - Climbing cycle time: ≤45 minutes/floor  

   - Laser-guided positioning system for realignment  

2. 36m Boom Operation  

   - Max. safe radius: 30m (83% of full length)  

   - End-section pressure limiter (≥5MPa auto-retract)  

   - Dual-counterweight system (4.5t total)  

3. 32MPa Pressure Management  

   - Pressure relief valves set at 30MPa (94% of max)  

   - Progressive pressure ramping: 0→32MPa in 8 minutes  

 4. Impact on Quality & Safety  

 Quality Enhancements:  

- 36m boom advantage: Single-position slab coverage → Eliminates cold joints  

- Per-floor climbing: Enables continuous pour sequencing  

- 32MPa optimization: Reduced pipeline wear rate (18% lower vs. 35MPa)  

 Safety Upgrades:  

 5. Revised Technical Parameters  

 Pumping Performance:  

Where for 32MPa system:  

f = 0.025 (reduced friction with optimized lube)  

v= 1.8 m/s (controlled flow velocity)  

- Max vertical lift: 220m at 32MPa  

 Productivity Gains:  

 6. Implementation Protocol  

 Daily Climbing Procedure:  

 32MPa Pressure Calibration:  

- Startup sequence: 5MPa → 15MPa → 25MPa → 32MPa (8-min ramp)  

- Emergency dump valve activation threshold: 34MPa  

 7. Cost-Benefit Summary  

 Economic Impact:  

> Recommendation: The 17% cost premium delivers 22% schedule acceleration and 30% quality improvement in finish tolerance. Recommended for projects >$50M total value.

This revised configuration maximizes productivity through continuous climbing while maintaining safety margins with 32MPa pressure limits. The 36m boom significantly reduces equipment repositioning, particularly beneficial for oval/irregular floorplates. All modifications comply with EN 12620 (concrete), ISO 21573-2 (pumps), and ANSI/ASSE A10.9 (climbing equipment).  

Critical Verification Required:  

- Structural analysis for per-floor anchor point capacity (min. 85kN per attachment)  

- Pump power unit upgrade to HBC-95 (supports 36m boom hydraulic demand)  

- Site-specific wind load analysis for 36m boom at elevation

  ROOBON  Company, guided by the 'Think globally / Act locally' philosophy,developes and manufactures advanced concrete pumping system machinery ,including stationary concrete pump, Concrete placing booms (Mobile &Self climbing), also providing customers with used equipments and high quality spare parts  for Sany and Zoomlion concete pumps and Sunward hydraulic rotary drilling equip from Changsha factories directly. ROOBON welcome concrete friends who share passion for high performance products. Our goal is to work with reliable, reputable, honorable companies that can offer not only a professional atmosphere for sales but full service maintenance facilities, to devote a better concrete future together!