HCSE Provide Didderent Types of Retaining Walls in USA. A retaining wall is a structure that retains (holds back) any material (usually earth) and prevents it from sliding or eroding away.

1. A retaining wall is a structure that retains
(holds back) any material (usually earth) and
prevents it from sliding or eroding away. It is
designed so that to resist the material pressure of
the material that it is holding back.

2.  It's possible to build Retaining Walls Services with
everyday landscaping materials such as lumber and
stones, but you can also build more complicated
versions that entail the use of concrete, reinforcing
steel and support systems. Height is the main
consideration for retaining walls; the more soil you
need to hold in place, the higher the wall should be.
Lumber and stone are enough for smaller retaining
walls, known as gravity walls, but larger walls such as
cantilever, counter fort and buttressed walls need
concrete and reinforcing steel.

3.  These are arguably the oldest and most frequently
used Retaining Walls. They are often made from stone or
other heavy materials, and rely on the weight of their own
mass to resist pressures from the retained material. Gravity
walls should be a minimum of 50 to 60% as thick as the
height of the wall. They may have to be larger if there is a
slope or surcharge on the wall. Modern gravity walls
include concrete crib walls, gabions, boulders, and large,
precast concrete blocks. Gabions are a type of soil
strengthening, consisting of wire mesh cages into which
roughly cut stone or other material is filled. Gabions work
to reduce internal movement and erosive forces.

5.  Before the introduction of modern reinforced-soil gravity walls,
cantilevered walls were the most common type of taller retaining wall.
This type of wall uses much less material than a traditional gravity wall.
Cantilevered walls are made from a relatively thin stem of steel-
reinforced, cast-in-place concrete or mortared masonry, fixed at one
end, usually by way of a simple, embedment or cantilever foundation
(often in the shape of an inverted T). These rigid concrete footings
must be positioned into firm suitable foundations. The wall operates
like a beam — cantilevering the load to a large, fixed structural base —
converting horizontal pressures from behind the wall into vertical
pressures onto the ground below. Sometimes cantilevered walls are
buttressed on the front, or include a counterfeit on the back, to
improve their stability against heavy loads. Buttresses are short wing-
like walls at right angles to the main trend of the wall. Typical
cantilever walls include reinforced concrete, or concrete-filled
blockwork, concrete or timber sleeper walls, concrete, steel or timber
sheet pile, or contiguous piling.

7.  These walls are pinned both top and bottom using cables,
or other stays, which are anchored in the rock or soil
behind it. Anchors are driven into the material and then
expanded at the end of the cable, either by mechanical
means or by injecting pressurized concrete into the hole.
They concrete expands to form a bulb in the soil. The wall
may be embedded at the base and tied to a slab at the top
or to a “deadman anchor” — a concrete structure which is
driven into the ground or anchored to the earth with
sufficient resistance. The horizontal cable, rod or helical
anchor, and deadman structure resists forces that would
otherwise cause the wall to become unstable. This method,
though technically complex, is useful where high loads are
expected, or where the wall itself has to be slender and
would be too weak without anchoring.

9.  These systems do not simply consist of the wall itself, but make use of
reinforcing grids or straps to contain and stabilize the slope. The
traction-resistant reinforcement elements change the nature of the soil
mass and reduce the earth pressure acting on the wall. In mechanically
stabilized earth (MSE) walls the soil is artificially reinforced with layered
horizontal mats (geosynthetics). These mats provide additional internal
shear resistance beyond that of simple gravity retaining structures.
Layered steel straps may also be used. Reinforcing layers are attached to
outer facing walls (typically segmental retaining walls). The wall face is
usually made of precast concrete units that can tolerate some differential
movement. When the reinforced soil mass is sufficiently large to retain
the pressure from the soil behind it, it works with the wall to provide
stability. Nailed walls make use of slender elements — normally steel
reinforcing bars — which are inserted into pre-drilled hole and grouted
into place. The reinforcing bars are usually installed untensioned at a
slight downward angle. Isolated soil nail heads or a rigid (or flexible)
facing (often of sprayed concrete) may be used on the surface of the wall.

11.  Piling retaining walls in California (aka sheet
pile retaining walls) consists of wood planks, steel or vinyl
that has been driven into the ground and is held up by soil
on either side. Piling retaining walls are used in areas with
soft soil but not a lot of room to create wide barriers.
 For taller piling retaining walls, a tieback anchor is used to
help it stay in place. Usually, these anchors are set up
behind the face of a wall and the potential failure plain of
the soil. Then a cable connects the retaining wall and
anchor together. It’s important to make sure that the piling
retaining wall is able to endure the bending forces created
by the dirt on either side of it.

13.  Drainage is crucial in constructing retaining walls. Drain
tiles and fabrics are used to accomplish this, along with
sufficient aggregates in the base trench and backfill areas.
Compacting the base trench as well as the backfill material
is also important to provide a solid fill that won’t move
during ground shifts and freezes. Lateral ground pressure
is the No. 1 cause of failures in retaining walls; hiring a
licensed engineer to study the soil and environmental
status of the area is a safety measure you should keep in
mind. Building codes are likely to be in play as well, so be
sure to contact your local code agency before starting the
project.

14.  HC Structural Engineers is a famous structural engineering design and
consulting firm committed to providing the best highest quality
engineering services in California, USA. Our professional teams always
update with advances technological and engineering trends to give our
client high quality services with innovative design that changing world
of design and construction. To know more about the company and past
project detail, please visit hcseonline.com today or you can also call us
on (650) 557-4333.
 HC Structure Engineer Bim Services, Home Remodeling, Retaining
Walls, commercial retaining walls , Soft Story Retrofit , new
construction design , home structural engineer , 3d and 4d bim
modeling services etc Services Provide in USA.
 Visit Our Site: http://hcseonline.com/services/retaining-walls/

15.  View More Information then visit our blog:
 http://hc-structural-engineering.blogspot.in/

16.  http://www.ehow.com/info_12074627_construction-
retaining-walls.html
 http://structuralengineercalifornia.blogspot.in/2015/12
/you-must-know-about-retaining-walls.html

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