Construction—North America—USA—Excavations
Large Scale Use of DYWIDAG Anchors:
The San Gabriel Trench in California
The San Gabriel Trench Project is being built in the city of
San Gabriel in Los Angeles County. A 2.25km (1.4mi) long
section of the Union Pacific railway tracks is being lowered
into a trench that runs through the city.
The project includes four new road and
pedestrian bridges crossing the tracks that
will ensure a safe transit of the railway line for
the almost 90,000 vehicles using the roads
every day. Consequently, the long wait times
and the ensuing environmental impact will be
eliminated.
The trough structure is being built to a depth of
9.14m (30ft) and a width of 19.81m (65ft) using
the open cut method. Once the excavation
and stabilization measures have been finished,
concrete walls will be erected in the trench,
and the new railway tracks will be placed.
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Different DYWIDAG Anchor Systems were
required to stabilize the excavation walls.
DSI Construction USA produced and supplied
202 temporary, 3-6 strand DYWIDAG Strand
Anchors with a total length of approximately
13.3km (43,700ft) including accessories.
Furthermore, 2,206 permanent, double
corrosion protection (DCP) 4-10 strand
DYWIDAG Strand Anchors were installed
in the excavation. The permanent anchors
utilize 0.6" strand with a total length of nearly
229km (751,000ft) as well as corresponding
accessories.
DSI also produced and supplied 433
permanent, double corrosion protected (DCP)
DYWIDAG Bar Anchors including accessories.
More than 5km (16,700ft) of 26mm Ø,
GR 150 DYWIDAG THREADBAR ® was used
for the bar anchors.
Furthermore, DSI supplied the equipment
for testing and stressing the strand and bar
anchors. The Tensa and HOZ type jacks
ensured efficient and fast tensioning and a
time-optimized lock off of the anchors.