Looking south from inside the cross-cut cavern, three distinct sections of the south platform cavern are currently being excavated.
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Looking south from inside the cross-cut cavern, three distinct sections of the south platform cavern are currently being excavated.
A worker descends the ramp leading up to the top header of the south platform cavern, where excavation work continues.
An excavator fitted with shotcrete spraying machinery sits inside the top header of the south platform cavern, which is currently being excavated.
Workers ascend and descend the earth ramp leading up to where top header excavation work is being conducted for the south platform cavern.
A crew positions dual drill rigs to install pipes and grout surrounding soil as part of top header barrel vault installation work for Chinatown Station's platform cavern.
Workers adjust machinery as part of drilling work inside the top header of the south platform cavern.
Different work occurs at different levels inside the station cavern area. Crews install drill pipe casings as part of soil grouting work before excavating out portions of the cavern top header, while a ramp leads down to the right side drift of the south cavern nearby.
A crew precisely aligns drilling equipment inside the top header of the south platform cavern, where top header excavation work is underway.
Drilling pipe casings and temporary reinforcing are uncovered as part of initial excavation work to open up the top header of the south platform cavern.
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A shotcrete spraying machine is slowly brought out of the top heading of the SEM excavation work for the future station cavern entrance archway.
Work to excavate the top heading of the entrance archway into the future station cavern is more than half complete.
After each push of excavation into the top header is complete, workers install steel mesh and spray shotcrete to reinforce the walls.
A shotcrete spraying machine pivots while spraying, controlled by an operator watching its movement carefully.
An operator fitted with a respirator and other safety gear uses a shotcrete spraying machine to temporarily cover an exposed section of earth inside the top header of the center drift, where SEM excavation is underway.
Workers gesture toward the future entrance archway of the Chinatown station cavern, while a shotcrete spraying machine is moved into place in the background.
