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Friday, 26 February 2010

Rekayasa Pondasi

Pengertian Pondasi

Pondasi adalah bagian paling bawah dari suatu struktur yang menstransfer berat struktur di atasnya ke tanah atau bahan dibawahnya.


                                                                  Pondasi

Klasifikasi pondasi
1.Shallow Foundation / pondasi dangkal
-pondasi tapak / footing foundation
-pondasi memanjang / spreat footing foundation
-pondasi rakit / raft foundation


                                                                               


2. Deep foundation / pondasi dalam
-pondasi tiang pancang / driven pile
-pondasi tiang bor / bor pile
-pondasi sumuran / caisson pile

Menurut Terzaghi (1943)
Df / B > ≤ 1

beberpa penelitian setelah Tezaghi
Df/B > 3 to 4

Pembebanan
-tipe beban rencana
1.beban / gaya normal (n)
2.beban / gaya geser  (v)
3. beban / gaya momen (m)
4. beban torsi / gaya torsi (t)


1. beban mati (D) > beban bangunan
2. Beban hidup (L) > beban orang,barang,kendaraan
3. Beban hujan (R)
4. Beban Salju (S)
5.Beban tekanan tanah (H)
6. Beban cair (F)
7. Beban gempa bumi (E)
8. Beban angin (W)