A Short Guide About the Excavation Method

The excavation process involves several complex mechanisms. Professional engineers carry out the construction process using appropriate tools and excavation techniques. This post introduces different excavation methods and their respective applications.

Of course, several factors influence the choice of excavation method. These include the constitution budget, the availability of construction equipment, the site area and the type of foundations of adjacent structures.

Let’s take a look at the different construction methods used for excavation - according to the excavating contractor in Unanderra and other places.

Full Open Cut Method

Here are some specific excavation methods that can be divided into two types:

Sloping Full Open Excavation Method

This method is economically feasible as the sides of the excavation area are sloping. Therefore, there is no need to support foundation walls. However, it is more expensive when the excavation is relatively deep or sloping.

Cantilever Full Open Cut

According to the excavating contractor in Albion Park and other locations, this method requires support columns to support the foundation walls. This prevents subsidence.

Anchor Excavation

Anchor excavation is used to resist soil pressure. In this method, anchors are placed. The anchor has a confining part where the force acts against the earth's pressure. On the other hand, there is an unconfined part of the anchor. The pressure is transmitted through this part to the head of the anchor. Again, the anchor head is subjected to the load on the retaining wall. The strength of the soil greatly affects the anchorage force. This method is suitable for excavating large areas at shallow depths near Albion Park.

Supporting Method

According to the excavating contractor near Unanderra and other regions, in the bracing method, horizontal supports are placed in front of the retaining wall. This helps to keep the pressure of the material against the excavation wall. This mechanism involves the use of starters, bales, end supports, corner supports and centre posts. Soil pressure is transferred to the horizontal support columns using bales. On the other hand, end supports and corner supports to minimise the bale span. However, the number of outriggers remains limited. The use of the centre post also prevents the struts from breaking under their weight.

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