The conditions that cause the soil to sink

Geological survey is an indispensable work in the process of preparing the construction. Survey results will determine whether the works are constructed or not, or how to decide on the foundation treatment process, what method, after having a stable background plan, the new works Execution. And the causes can cause subsidence status in the works. Let's go through it and learn some more things to know for you.

The problem of subsidence is uneven

Consequences of errors during land survey and in management of geological environment or significant economic losses. In order to minimize and remedy (sometimes irreparable), it is necessary to have a law on the protection and exploitation of the geological environment. The contents of these rules can not be expressed in the context of this article.

In the following, there are several unevenly solved situations that require attention in geological exploration to detect it before design and in finding the cause of failure when searching for remedies.

Ground conditions may cause uneven subsidence

The soil is compacted or sloping. This situation is often encountered in the construction of lowland valleys or river encroachment areas, industrial parks with ground leveling technology for use as natural compressive substrates, compaction, consolidation, such as pre-consolidation by sand piles, sand wells, and drainage. For large loads, use piles through the embankment, pay attention to slide along the slope, or slip the whole foundation as well as the works, protect the ground by collecting the surface drainage at the same time, to avoid permeability. flooded

The uneven distribution of tightness (when the ground is embankment) or there are rocks, building rubbish. Improved by static drilling or dynamic loading, sometimes using pile drilling...

The soil layer is uneven at the bottom of the foundation. The issue of unevenness is obvious if the structure is large. To avoid the need to combine the rational organization of the above structure (divided into independent units, increase hardness...), with the underlying foundation, the direction of land improvement (soil replacement, consolidation Use a soft pile like cement pile...) to treat the ground or use a foundation if the thickness of the soil changes drastically.

Having weak ground lenses under the nail: depending on the work on the strength of the structure or choose the appropriate solution including the use of piles through the lens, attention should be paid to the impact of sound on the pile.

Have weak soil at the beginning of the project: if it is thin, then dredge and replace with other good soil; If thick, use different solutions such as slits to cut work into monolithic blocks, or use piles through weak soil layers and resist the fine soil for both sections of the building.

The above are common problems when building foundation works, foundation treatment or geological survey. This is the case where it is necessary to improve the subsoil so that it does not collapse.