Urutan kerja
Foundation work sequence
Foundation work should move from verified levels to excavation, base preparation, reinforcement, concrete, waterproofing, drainage and controlled backfill. Skipping checks here makes every later stage more expensive.
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Urutan ini terhubung dengan kalkulator, checklist dan halaman biaya kesalahan agar planning dan kontrol risiko tetap satu sistem.
Urutan pekerjaan yang direkomendasikan
01 Set out excavation and control levels
Translate drawings into real site geometry before soil is removed.
- Mark grids, excavation edges, offsets and safe access routes.
- Check formation level against benchmark and drainage assumptions.
- Separate reusable soil, unsuitable material and disposal routes.
Hold point: No concrete or blinding should be ordered until excavation depth, bearing condition and level records are confirmed.
Alat, peralatan dan akses: Laser level, Excavator, Plate compactor, Measuring staff
02 Prepare base, blinding and service penetrations
Create a clean, level and coordinated base before reinforcement starts.
- Trim soft spots and compact the formation or sub-base.
- Install blinding concrete where specified to protect reinforcement and waterproofing.
- Fix sleeves and penetrations before reinforcement becomes congested.
Hold point: Reinforcement should not start until base cleanliness, sleeves and levels are signed off.
Alat, peralatan dan akses: Compaction tester, Concrete tools, Sleeve templates, String line
03 Place reinforcement, concrete, waterproofing and backfill
Close the foundation only after structural and water-control details are inspectable.
- Check bar spacing, laps, cover, starter bars and embedded items.
- Pour concrete with vibration, level control and curing protection.
- Apply waterproofing, drainage and protection layers before backfill.
- Backfill in layers with compaction records.
Hold point: Do not backfill until waterproofing, drainage outlet route and hidden work photos are complete.
Alat, peralatan dan akses: Rebar bender, Vibrator, Cover blocks, Waterproofing roller, Compactor
Alat, peralatan dan akses
Earthworks
- Excavator
- Plate compactor
- Shoring tools
- Dewatering pump
Concrete and reinforcement
- Rebar cutter and bender
- Concrete vibrator
- Screed rail
- Cover gauge
Waterproofing and drainage
- Primer roller
- Torch or membrane tools
- Drain pipe cutter
- Protection board knife
Norma konsumsi material untuk perencanaan
Rentang konsumsi adalah benchmark perencanaan. Kuantitas final harus dicek terhadap gambar, spesifikasi, kode lokal dan data supplier.
| Material atau resource | Basis | Rentang rencana | Unit | Catatan |
| Reinforcement steel | Concrete volume | 80-140 | kg/m3 | Concept-stage allowance only. |
| Blinding concrete | Foundation area | 0.05-0.08 | m3/m2 | Matches 50-80 mm layer. |
| Waterproofing protection board | Vertical waterproofed face | 1.05-1.15 | m2/m2 | Allows cuts and laps. |
| Compacted backfill layers | Backfill depth | 150-300 | mm/layer | Layer thickness depends on compaction equipment. |
Quality gate sebelum lanjut
- Excavation formation, levels and bearing condition are documented.
- Sleeves and penetrations are fixed before concrete.
- Rebar cover, laps and starter bars are inspected before pour.
- Waterproofing and drainage are photographed before backfill.
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Struktur dasar yang menyalurkan beban bangunan ke tanah.
Elemen baja untuk meningkatkan kapasitas tarik beton.
Jarak antara tulangan dan permukaan beton yang melindungi baja dan menjaga kinerja struktur.
Sistem pelindung agar air tidak menembus elemen bangunan.
Manajemen aliran air di area sekitar bangunan.