Measurement of the carrying capacity of the soil must be carried out first because there are many types of soil with different densities and bearing capacities, such as hard rocky soil, sandy soil, soft clay, etc., some are stable some are unstable. So, the application of the foundation is adjusted to the type and condition of the land where your house will be built. Soil measurements are carried out by investigating the soil (CPT) at several points, especially at the point of installation of the foundation. Cone Penetrometer Test (CPT) is a method of stress testing that is carried out to analyze the bearing capacity of the soil and measure the depth of the hard or supporting soil layer which is commonly called CPT soil. By knowing the depth of hard soil (CPT) which will be used as a footing for a pile or pile, the contractor can design a foundation that is by safety standards to support the building column. On the other hand, if you wish to do precise plate load testing by hiring highly skilled experts, we suggest you hire a trusted plate testing company.
So that the foundation remains strong withstand the load of the buildings on it and does not experience settlement because it can endanger the safety of residents and the stability of the building structure. The CPT test is included in the soil test. There are many cases of structural failure due to unstable soil contours due to CPT testing before construction, the effect is that the foundation becomes unstable and the building collapses. However, to carry out this CPT test, of course, requires tools and experts in their fields. Of course, there will be additional costs at your development planning post.
In contrast to the CPT test, the boring test is a soil test to determine the soil condition of each layer to the hard ground. The standard set in this test is the SPT (Standard Penetration Test) with a value every 2.0 m interval.
The type of foundation chosen must be adjusted to the type of soil.
Also, attention must be given to the vibration effect of the foundation installation on the surrounding environment. For residential areas or near residential areas, the drill pile foundation is considered very good because at the time of the installation process it does not cause vibrations so that residents do not feel disturbed.
Furthermore, a building couldn’t simply be erected directly above the ground level, therefore a foundation was required. The foundation is a part of building construction that functions to place the building and transmit the load transmitted from the upper structure to the subgrade, which is strong enough to hold it without any differential in the structural system.
In general, the building includes two main parts, namely the upper structure and the lower structure. The structure at the bottom is a foundation that interacts with the ground and will provide security for the upper structure. The lower structure as a foundation can also generally be divided into two parts, namely shallow foundation, and deep foundation.
Things that need to be considered in choosing the type of foundation are the condition of the foundation soil, the limitations due to the construction on it, the condition of the area around the site, the time and cost of the work as well as the solid, rigid and strong foundation of the foundation. The foundation criteria that must be met in planning a foundation are that the foundation must be placed properly, so that it does not slide due to external influences, and also the foundation must be safe from sliding bearing capacity, and the foundation must be safe from excessive subsidence.
Aside from that, to overcome the problem of “problematic” soil construction, namely by implementing applied designs such as retaining walls, slope stabilization, reinforcing embankments, strengthening foundations, filtration, drainage, waterproof coatings, and so on. However, it’s specifically to strengthen the soil bearing capacity using geotextile. Not infrequently, wood and bamboo materials are also used to bear the tensile forces that arise in road construction or embankments. Soil strength to bear loads is very supportive of the stability of a building structure where the soil as the basis of reinforcement of the building structure must have a large bearing capacity and shear strength.
Does every building need CPT and boring tests? Yes. For the sake of building safety, it is recommended that buildings with 2 floors and higher must use the services of CPT and boring test before moving to the next stage.