Projeto Horizontal Obras Rodoviarias.docx

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Projeto Horizontal Escala 1:200 Região topográfica: Montanhosa Classe rodovia: Classe III Velocidade diretriz: 40km/h Raio mínimo horizontal: 50m Largura semi-pista: 3,5m Largura de acostamento: 1,5m Super elevação máxima: 8% Rampas máximas Faixa de domínio: 50m

Memória de cálculos Curva 01 (á Direita - simples) Ac: 45° 00’ 00” Raio mínimo: 200 Distância estaca 0 + 0,00m até PI1= 273m

Tg ext = [𝑅 𝑥 𝑇𝑔 𝑒𝑥𝑡 (

Ac 2

Tg ext = [200 𝑥 𝑇𝑔 𝑒𝑥𝑡 (

)] 45 2

)] = 82,843 m

PC = 263 – 82,843 = 190,157 m Estaca PC = 9 + 10,157 m D=[ D=[

𝜋 𝑥 R 𝑥 Ac 180 𝜋 𝑥 200 𝑥 45 180

] ] = 157,080 m

PT= 190,157 + 157,080 = 347,237 m Estaca PT = 17 + 7,237m

Curva 02 – á Esquerda (composta) Ac: 40° 00’ 00” Raio mínimo: 300 Distância PT até PI2= 436m Lc mínimo = 0,036 x [

𝑉3

]

𝑅

403

Lc mínimo = 0,036 x [ 300 ] = 23,04

Sc = [ Sc = [

Xc = [ Xc = [

𝐿𝑐

Lc adotado= 80

]

2𝑅 80

2 𝑥 300

] = 0,133 rad

Sc x Lc 3

]

0,133 x 80 3

Yc = Lc x [1 − Yc = 80 x [1 −

] = 3,547 m

𝑆𝑐 2 10

𝑆𝑐 4

+ 216]

0,1332 10

+

0,1334 216

] = 79,589 m

P = Xc – [R 𝑥 (1 − cos sc)] P = 3,547 – [300 𝑥 (1 − cos 7,620338675)] = 0,898 m

Q = Yc – [R 𝑥 (𝑠𝑒𝑛 sc )] Q = 79,589 – [300 𝑥 (𝑠𝑒𝑛 7,620338675)] = 40,077 m

Ts = q + (R + P) x Tg [

𝐴𝑐 2

]

Ts = 40,077 + (300 + 0,898) x Tg [

40 2

] = 149,595 m

ac = Ac – (2 x Sc) ac = 40 – (2 x 7,620338675)= 24,75932265⁰

D=[ D=[

𝜋 𝑥 R 𝑥 Ac 180

]

𝜋 𝑥 300𝑥 24,75932265 180

] = 129,640 m

Estaca Ts = 436 – 149,594 + 347,232 = 633,638 m Estaca Ts = 31 + 13,638 m Estaca Sc = 633,638 + 80 = 713,638 m Estaca Sc = 35 +13,638 m Estaca Cs = 713,638 + 129,640 = 843,278 m Estaca Cs = 42 + 3,278 m Estaca St = 843,278 +80 = 923,278 m Estaca St = 46 + 3,278 m

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