Landslides
and Slope Repair
Soldier
Piles
Tieback Anchors
Grading Solutions
Hydraugers
Drainage Galleries
In general, landslides are complicated systems of geology, geomorphology
and hydrogeology. Rarely does a single design tool address all
of the problems associated with incidences of mass movement such
as landslides. As a result, D.J. Scheffler, Inc. is very selective
when considering projects where the mediation of active or ancient
landslides is included in the scope of work.
For all landslide related projects, D.J. Scheffler reserves the
right to:
1) Require job specific insurance policies such as OCIPs or a
....contractor
Wrap-Up insurance policy
2) Third party review of site geology and remediation design
3) Have a “Hold Harmless” agreement in place, in case
....immediate/emergency work is required.
Soldier
Piles
Soldier piles, or shear
pins, consist of vertical shafts drilled through
the unstable zone, and heavily reinforced with steel
and high strength concrete. Shear pins can be used
to stabilize shallow zones of instability, or in
conjunction with tieback anchors for larger masses
of unstable soil.
Tieback Anchors
A tieback consists of a small diameter drilled shaft that is fitted
with a steel-tensioning element that is centered in the hole. The
shaft can be horizontal or drilled at an angle depending on the
specifics of the job. Once placed, the steel element is surrounded
by cement grout.
Tieback anchor systems are rows of tiebacks. The shaft can be horizontal
or drilled at an angle depending on the specifics of the job. Horizontal
spacing between the tiebacks is job specific. Vertical spacing
between the tieback rows is typically 5 feet. Each tieback is hydraulically
tested and tensioned at a specified design load, frequently in
excess of 850,000 lbs.
The steel ends that protrude from the earth are then incorporated
into a reinforced concrete beam or slab that contains the unstable
soil mass. Tiebacks can be drilled to depths beyond 250 feet. |
 |
Grading Solutions
Many projects involve a significant quantity of grading in conjunction
with structural repairs. Grading includes the construction of key-ways,
drainage systems and re-establishing surface grades. Once graded,
proper landscaping can further enhance the slope’s stability
and enhance the aesthetic appeal of the repairs.
Hydraugers
Hydraugers are near
horizontal drainage elements drilled into the ground
in order to minimize groundwater. The buildup of
groundwater can trigger landslides. Under specific
conditions, it is more economical to install a drainage
system to prevent the buildup of groundwater before
the movement of a soil mass, as opposed to constructing
some form of structural support system.
Drainage
Galleries
Drainage galleries are designed to remove
as much water as possible from an unstable soil mass.
Drainage galleries consist of closely spaced large
diameter vertical shafts. These shafts are filled
with gravel.
Groundwater will follow the path of least resistance, and the gravel
columns provide less resistance to the flow of water than the surrounding
native soil. The bottoms of the gravel columns are provided with
outlets for the water to escape, either by gravity with hydraugers,
or via a system of electric pumps.
Return to the top
of the page
|
|
|
|
|
|
|
| |
Contact
Us today
for a solid bid on
your next project.
For more information
call (909) 595-2924
or click on the
link below.
 |
|
|
|
|
.jpg){kind=small}