Shoring is a term
that refers to the practice of bracing the structure with the help of temporary
and strong structures to prevent collapse of the materials. While many people
may get confused between the terms shoring and shielding, they are totally
different. Shoring is the process of popping up structure to prevent collapse
of earth while shielding is use of safety methods to protect the workers in
case of a collapse.
Different techniques used in Trench shoring
Soil Nailing
In this technique,
the soil nailing contractoruses
reinforcing, strong and elongated bars to insert them into the pre-drilled
holes. After that, they are sealed with binding material to hold the walls,
excavations, and soil slopes.
They are generally
planted in semi-downward incline without creating any tension. The soil nailing contractor normally uses
the lone soil nail heads or sprayed concrete.
Beam and plate
In this technique,
beams are planted firmly on ground and they are reinforced with the steel
plates in between. The soldier boarding that uses wood planks also use similar
mechanism. This kind of shoring is normally used for excavation that may span
longer duration of time.
Hydraulic shoring
In this method,
hydraulic pistons are popped up until they push against trench walls. Plywood
or steel plates are used with pistons. This kind of shoring is one of the
easiest methods amongst others.
By following the
safety rules every time, shoring can be used effectively without any accidents
or risks. Moreover, with the right equipment and supplies, it can be done
without any hassles.
The stabilisation
of soil is basically an improvement
program through which characteristics of a soil type present on a construction
site is altered and engineered in a way to accomplish the construction project
successfully. It is equally important for both commercial and domestic
projects.
To stabilise soil
is necessary because of various reasons, some of which include resistance from
the damage caused by water or adverse environmental conditions, for improving
tolerance for bearing heavy weights, etc. There are various ground stabilisation
contractors, which provide expert
services in the stabilisation of soil and modification of the soil type.
Experienced contractors
A good contractor
evaluates and accesses the area of construction properly to find out the areas
of improvement and modification, which is needed
for the safe ongoing of the project. Experienced engineers and workers imply
the use of advanced tools and effective technologies to overcome any observed
shortcomings.
Ground
stabilisation contractors adopt three major categories of stabilisation method,
which includes mechanical methods, chemical methods and use of polymers, to
modify the soil or to alter it positively.
Soil stabilisation through mechanical methods
There is various equipment used by contractors to mix and
stabilise soil in order to modify it. For
slope and soil stabilisation various equipment
like crane box drilling, portable rigs, Skid Mountain drills, etc. are used.
Mechanical methods like
Shotcrete and excavation may take more time than other methods because they
need manpower and force application by
them on the soil present on-site.
Chemical methods
Chemical methods
may cost you more, but they are adopted
for a better permeability of the soil as well as to increase the density of the
soil in a controlled manner. Some of the most famous chemical soil stabilisation
method includes Lime soil stabilisation, use of sodium silicate and use of
sodium chloride.
These methods can be applied on
the construction areas where a heavy
amount of plastics and other harmful chemicals have been found in the clayey
soil and are deteriorating the quality and performance of the soil.
Use of grouting
The grouting
technique can be of various types including clay grouting, Bituminous grouting,
Chemical grouting, etc. In grouting, Stabilisers
are injected into the soil to alter its chemical and physical properties. It is
an expensive method and hence one should
rely on experts for the proper
implication of this method at the site to achieve stabilisation.
Use of polymers or fabrics
Use of polymers or
fabrics in soil stabilisation is comparatively a new method. Use of geotextiles
in ground stabilisation is an effective method to achieve soil stabilisation in
a safer way than chemical methods.
They are also
cheaper than various soil stabilisation methods. Uses of metallic strips,
synthetics such as PVC, polyesters, etc. are some of the effective ways to
obtain soil stabilisation successfully.
All of the soil
stabilization techniques are mostly employed in construction projects
throughout the world. Out of all, polymer based solutions are rapidly gaining
popularity, as they are cost saving, offers environmental benefits, easy to
use, and many other significant perks.
Basically, rock
anchors are commonly used to resist foundation movement. Most of the rock
anchors have pre-drilled hole filled with the grout material.
Rock anchors come in a variety
of sizes as well as weight capacities that depend on their usages. However,
their installation and use are generally the same.
Simple Steps to install rock anchors
Drill the hole
You will need to
consider the material that you are drilling into as well as the size of the rock anchors that you will use. You may
even need drilling through unstable, loose, and old materials to install the
anchor firmly.
Inject the grout
Before injecting
the grout, you will need to clear out maximum debris from drilled hole. You can
even fill the drilled hole with the grout from bottom up through top. It will
also help you in clearing the holes from debris.
Insert threaded sheathed
anchors and install bearing plate
The sheath will
keep threaded anchor away from bonding with grout material since it dries. It
will therefore make it almost impossible to tension or turn. Once grout
properly sets up, you can then remove sheath.
Now it is time to
attach steep bearing place to outside surface of anchored material. Together with
bearing plate, this won’t allow any kind of tension to rock anchor once it is
installed.
While following the
above steps, you can easily install rock anchors. Going for professional
services will help you to get the tasks done more efficiently.
Soil nail wall is a construction method, which
stabilizes the slope and gives support to it. It provides steel bars to oppose
the force opposite to slope breakdown. Some of the suitable conditions to
perform soil nailing methods are sandy, silty and hard clay.
The nails are inserted from the top into the surface,
so, they are called as soil nails.
This avoids the mud slide trouble and requires less time to finish the work.
Construction
The Soil nails are the bars made up of
steel. These will be inserted in the holes and grouted with the materials like
shot-crete. The step-by-step process for the construction of the wall is as
follows:
·Examine the area
to know whether it is suitable for the construction.
·Install the first
bar and then lay shortcrete on it, to cover the nail.
·Then, place head
plate over it.
·Repeat similar
steps until the wall is completed.
Depending on the requirement construct either
permanent or temporary wall. They make complex constructions like constructing
flyovers etc to complete easily.
Benefits
·There will be no
limitations on the height.
·It will be used
to repair, alter and construct a new one.
·Reduces
unnecessary expenses.
·Less noise
disturbances.
It is
necessary to construct the soil nail walls higher than the ground water to
avoid future problems. Soil nail walls construction is the best economical as
well as affordable method with a lot of benefits.
A new foundation construction or excavation often has soil
stabilization as the foremost step. If the excavation or construction is happening
in a less busy or barren land, the issue is not that manifold. However, if soil
stabilization techniques are to be applied in a busy area, especially near an existing
building, it is necessary to take measures to ensure that the adjacent
foundation is not hindered in any way, Thus, to prevent the adjacent wall from
collapsing or caving in to the excavation, it is important to involve
foundation repair specialists into the scene.
Types of soil
stabilization techniques
The most common form of soil stabilisation technique
undertaken by foundation repair contractors is that of soil
nailing. If stabilizing an excavated area, to ensure that the new
basement foundation is formed and poured with ease, soil
nails are driven into the side of the excavation. This is done by installing a screen
of steel mesh and creating a temporary retaining wall by using concrete.
Shotcrete-concrete that has been thinned and modified is used in cases of new
excavation between two existing building.
Foundation repairs become difficult in densely populated
areas as they can disrupt traffic, negatively impact adjacent
building-commercial and residential, and damage landscape. It thus becomes
extremely important to employ methods that cause the least issues in commercial
zones and urban areas. There are few non-destructive foundation repair techniques
apart from intrusive soil nailingas
well.
Foundation repair specialists have few foundation repair
techniques in their hands that do not require complete demolition and replacing
of damaged foundation. These involve driving steel piers beneath damaged
sections and connecting them with the foundation using specially designed
brackets. The settled foundation sections are then raised to restore stability
and close cracks. This eliminates the need of large excavation equipment and
dumping trucks, thus avoiding major disruptions in busy areas.