Recommended Application Areas for Foam Concrete Load Reduction

Modern architectural design and construction pay more and more attention to the free settlement of buildings during construction. Due to the different weight of each part of the building group, a difference in free settlement will occur during the construction process. During the design of the building, it is required that the foundation of the lower part of the building must be filled with soft materials as a compensation foundation. Foam concrete can better meet the requirements of compensation foundation materials.

Application of load shedding

（1）Tunnel load reduction

In underground tunnel engineering, the design of the tunnel structure requires that the overburden load must be within the range that the structure can bear. If the actual overburden load exceeds the structure's bearing capacity, the overlying fill must be reduced. For example, the use of foamed light soil to reduce the load is much simpler and more convenient than re-reinforcing the underground tunnel structure, and the cost is low, and it has obvious technical and economic advantages.

（2）Other load shedding

The base load reduction of some special buildings, for example, the base treatment of the Wuhan Anti-Flood Monument uses foamed concrete for load reduction to meet the requirements of its base bearing capacity and avoid the tilting of the building due to ground deformation.

Application of steep sections in mountainous areas

（1）Reduce the load, reduce the sliding moment of the subgrade itself, and improve the anti-sliding stability of the subgrade; avoid the high difficulty and high cost of anti-sliding design and construction of the subgrade.

（2）Avoid the stability problems caused by high filling and the disadvantages of occupying a large amount of land resources.

（3）Avoid high slope support costs and environmental damage caused by high excavation.

Applications in other fields

（1）Filling of goaf in karst area

Using foam concrete embankment, because the load can be reduced to only about one-third of the conventional embankment, the requirements for the bearing capacity of karst areas and goaf areas can be greatly reduced, and the corresponding treatment measures can be greatly simplified or not treated, and the technology The quality is more guaranteed. Compared with the conventional embankment filling, it can be said that it provides a brand-new technical method.

（2）Soft foundation replacement of low embankment

For the low embankment of the soft foundation section, the light weight of foam concrete can be used to replace the soft foundation appropriately, and all the subgrade filling is made of foam concrete. In this way, the principle of stress compensation and the advantages of load reduction can be used to make the embankment The total permanent load is less than the weight of the replacement foundation soil, so as to avoid the occurrence of settlement, cancel the conventional soft foundation treatment, and greatly shorten the construction period.

（3） Backfilling of underground cavities

For the low embankment of the soft foundation section, the light weight of foam concrete can be used to replace the soft foundation appropriately, and all the subgrade filling is made of foam concrete. In this way, the principle of stress compensation and the advantages of load reduction can be used to make the embankment The total permanent load is less than the weight of the replacement foundation soil, so as to avoid the occurrence of settlement, cancel the conventional soft foundation treatment, and greatly shorten the construction period.

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