Backfill foundation with hydrophobic layer

Abstract

The invention provides a backfill foundation with a hydrophobic layer. The backfill foundation comprises a foundation pit, backfilled soil layers, a first isolation layer and a gravel layer. During construction, the foundation pit is excavated firstly, a plurality of construction pipes are formed on the bottom surface of the foundation pit through pouring by using concrete, then backfilling of thegravel layer is performed on the foundation pit, and after the backfilling height of the gravel layer meets the construction requirement, the first isolation layer is laid on the upper surface of thegravel layer; then soil backfilling is performed on the upper surface of the first isolation layer to form the backfilled soil layers; in the soil backfilling process, the backfilled soil layers arerammed layer by layer through a soil ramming device so as to reduce the situation that the foundation is unstable due to the fact that the bottoms of the backfilled soil layers are not rammed; the gravel layer can effectively make water permeating downwards from the backfilled soil layers seep to the underground environment, the situation that rubber soil is caused due to the fact that the water in the backfilled soil layers cannot be drained is further reduced, the construction quality is greatly improved, and the situation that the construction period is prolonged due to the fact that construction does not reach the standard is reduced.

Description

Technical field [0001] The invention relates to the technical field of foundation construction, in particular to a backfill foundation with a hydrophobic layer. Background technique [0002] At present, the dynamic compaction method is generally used for the reinforcement of deep and thick foundations. Although the dynamic compaction method has a large treatment depth, the soil drainage and consolidation time is longer. Due to the impact of the ramming energy during the dynamic compaction construction, the Backfill tends to cause too much swelling of the soil around the rammed pit and the formation of rubber soil, so that most of the ramming energy is not transmitted downwards and is consumed in the surface soil, thus failing to achieve the expected reinforcement effect. Therefore, a method that can improve Backfill foundation with hydrophobic properties. Summary of the invention [0003] The invention provides a backfill foundation with a hydrophobic layer, which is used to impr...

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Problems solved by technology

[0002] At present, the dynamic compaction method is generally used for reinforcement of deep foundations. Although the treatment depth of the dynamic compaction method is large, the drainage and consolidation of the soil takes a long time. Due to the impact of the impact energy during the dynamic compaction construction, The backfill often causes the soil around the rammed pit to rise too much and the rubber soil to form, so that most of the ramming energy is not transmitted downwards and is consumed in the surface soil, thus failing to achieve the expected reinforcement effect. Therefore, a method that can improve Hydrophobic backfill foundation

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