{"id":17227,"date":"2024-09-30T11:17:18","date_gmt":"2024-09-30T11:17:18","guid":{"rendered":"https:\/\/teixeiraduarteconstrucao.com\/?post_type=tm_portfolio&p=17227"},"modified":"2024-09-30T11:17:18","modified_gmt":"2024-09-30T11:17:18","slug":"bypass-yo-alcacer-do-sal-2nd-phase-railway-crossing-of-sado-and-access-viaducts","status":"publish","type":"tm_portfolio","link":"https:\/\/teixeiraduarteconstrucao.com\/en\/projects\/bypass-yo-alcacer-do-sal-2nd-phase-railway-crossing-of-sado-and-access-viaducts\/","title":{"rendered":"Bypass yo Alc\u00e1cer do Sal – 2nd Phase – Railway Crossing of Sado and Access Viaducts"},"content":{"rendered":"

BYPASS TO ALC\u00c1CER DO SAL – 2ND PHASE
\nRAILWAY CROSSING OF SADO AND ACCESS VIADUCTS
\nFOUNDATIONS WITH PILES<\/h1>\n

Client<\/strong>: REFER \u2013 Rede Ferrovi\u00e1ria Nacional, E.P.
\nLocation<\/strong>:\u00a0Alc\u00e1cer do Sal \u2013 Portugal
\nExecution Period<\/strong>: 13 Months<\/p>\n

 <\/p>\n

Execution of 42 \u00d8 2.000 mm bored piles, in the bridge piers with definitive metallic casing or simultaneous use of metallic casing and stabilisation of the hole\u2019s walls using bentonite slurry below the metallic casing: average yield of the concreted pile of approximately 4 units \/ week and 2 units \/ week, respectively, considering an average drilling yield of roughly 44 m per day;
\nMetallic casing \u00d8 2000 mm used: 1.400 ml of metallic casing with lengths comprised between 23,5 m and 49 m;
\nExecution of bored piles with recoverable metal casing; 41 units \u00d8 1200 mm, 192 units \u00d8 1500 mm with yield of 34 m\/day;
\nExecution of bored piles with definitive metallic casing; 64 units of \u00d8 1500 mm, application of 1.378 m of \u00d8 1500 mm metallic casing with lengths comprised between 15 m and 33 m;
\nExecution of 18 cofferdams for the construction of the viaduct piers footings and 4 cofferdams for the bridge piers footing using vibro-driven metallic sheet piles and execution of a bottom plug;<\/p>\n

Crossed geology (strata thickness):
\nMud and muddy sand: 17 m (P1) to 30 m (P2);
\nFine to coarse sand, gravel sand with pebble (Miocene): from 8 m (P3) to 23 m (P2);
\nLoam Sandstone: minimum embedding of 6 m (p1);<\/p>\n

Bridge provisional piers: driving of 36 \u00d8 1200 mm tubes (1.640 lm) maximum depth reached: 54 m;<\/p>\n

Other works:
\nExecution of quays with 80×16 m (southern riverbank), 1.992 m of tubes \u00d8 813 mm, \u00d8 863 mm and \u00d8 1020 mm. Consumption of 289 tons of steel, assembling 18 tons per week, including pre-slabs;
\nExecution of quays with 42×6 m (northern riverbank), 588 m of tubes \u00d8 813 mm, consuming 69 tons of steel.<\/p>\n

Dredging:
\nSouth Margin: 32.000 m\u00b3
\nNorth Margin: 5.500 m\u00b3<\/p>\n

 <\/p>\n