4, Plate LVIII); and the other two were fitted with
clam-shell buckets for unloading sand and broken stone from barges and
depositing the materials in large hoppers, from which they were drawn
into wagons for transportation to the various concrete plants. A large
part of the cement (all of which was supplied by the Railroad Company)
was also unloaded at the 35th Street pier and hauled directly to the
work, the surplus being stored temporarily in the Company's cement
warehouses on 32d, 33d and 35th Streets, near First Avenue, from which
it was drawn as required. On the dock was located the main powder
magazine, a small concrete structure. Considerable use was also made of
neighboring piers for unloading electric conduits, lumber, steel, etc.
[Illustration: FIG. 1. SPECIAL STEEL BUCKET
PLAN OF BUCKET
END VIEW
SIDE VIEW OF BUCKET
SECTION AT A-A]
_Tunnel Plant._--The spoil buckets, designed by D. L. Hough and George
Perrine, Members, Am. Soc. C. E., were a novel feature of the work.
These buckets are shown in detail in Fig. 1 and various photographs.
They were of 3 cu. yd. capacity and were split longitudinally, the two
halves being pinned at the apices of the ends. For lifting, they were
suspended from eyes at that point, and, when dumping, trip ropes were
hooked into eyes at the bottom of each side; lifting the trip ropes or
lowering the hoisting rope split the bucket, as shown in Fig.
Pages:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25