The Wilshire Grand Center Hotel: DYWIDAG Products for a Football Field Sized Excavation
In downtown Los Angeles, work is progressing on the new Wilshire Grand Hotel, a 73 story, 900 room, 4-star hotel. The project also includes 37,160m² (400,000ft²) of office space as well as 4,190m² (45,100ft²) for restaurants and retail shopping. After its completion, currently scheduled for 2017, the approx. 335m (1,100ft) high building will be the tallest building in Los Angeles and on the West Coast. The main tower includes a special sail-shape crown illuminated with LED lighting at night.
To build the new hotel tower, the old Wilshire Grand Hotel had to be demolished. Afterwards, an excavation the size of an American Football field with a depth of up to 32m (105ft) was needed for the foundation of the new structure. Approx. 160,556m³ (210,000yd³) of soil had to be excavated and removed from the jobsite.
The specialist subcontractor Malcom Drilling was awarded a contract to build the tall retaining walls consisting of structural steel soldier piles with wood lagging for the excavation.
DSI USA supplied a total of 662 temporary DYWIDAG Strand Anchors with 4 to 12 strands in lengths of up to 22m (72ft) for tying back the retaining wall. In addition, 365 temporary DYWIDAG THREADBAR Anchors in diameters of 26, 32, 36 and 46mm (1", 1 ¼", 1 " and 1 ¾") were used. DSI USA also supplied the stressing and uncoiling equipment.
Work on the retaining wall was successfully completed in December 2013. The project set the new Guinness World Record of the largest continuous concrete pour with 16,209m³ (21,200yd³) of concrete.