Foundation treatmentIn bolus layer is the bottom of foundation under a certain range of weak soil digging, and stratification in filling strength larger sand, gravel, soil, lime soil, slag and other no corrosive materials, stable performance and ram (pressure, vibration) to the density of the design requirements, meet the buildings on the basis of the foundation strength, deformation and stability requirements.
When the upper soft soil layer within the building scope is thin, the whole filling treatment can be adopted. For partial loose fill, dark ditch, dark pond, ancient well, tomb or adjacent to the foundation in the scope of the building, local filling treatment can be used.
After excavation, the deep soft soil layer can also be treated by layering backfilling. At this time, due to the excavation depth required for filling replacement is too large, often because of the high groundwater level, precipitation measures need to be adopted; Slope support is required due to the large floor area of pit wall, or to prevent the settlement damage of adjacent surface pipe network, road and surrounding buildings, or due to the large amount of earthwork in construction, resulting in large treatment costs, construction period growth, great impact on the environment and other adverse results. Therefore, filling layer is generally suitable for all kinds of shallow foundation treatment, but for deeper soil treatment, it should be adopted after technical and economic comparison.
It SHOULD BE pointed out that a large area of soil filling will produce a large range of ground load influence, the foundation compression deformation is large, deformation duration is long, and so on. It is different from the characteristics of the foundation treated by the filling method of shallow layer, and the construction should be carried out according to effective regulations.
The cushion should meet the bearing capacity and deformation requirements of the building foundation, and should be designed according to the Technical Code for Building Foundation Treatment. In the design of cushion, THE SELECTION OF cushion MATERIAL, THE determination OF cushion thickness, THE range OF CUSHION PLANE AND ELEVATION, the BEARING capacity OF cushion FOUNDATION and the checking calculation of the underlying layer should be carried out.
1, cushion material selection
The bedding materials should be selected according to the regional materials, the principles of environmental protection and resource saving and the design requirements of the bedding foundation, sand, silty clay, ash, slag, other industrial waste slag, geosynthetic materials, etc.
2, the determination of cushion thickness
The thickness of the cushion should be determined according to the bearing capacity and deformation requirements of the building foundation.
3And deformation calculation of cushion foundation
The deformation of cushion foundation should be calculated by the summation method. The settlement shall meet the settlement allowable value of the building.
Shanghai Qiangqiang Foundation Engineering Co., LTD. 's business covers foundation pit engineering, pile foundation engineering, land and waterFoundation treatment, slope treatment and other engineering fields. Around" Excellent technology, reliable process", construction fast "technical requirements, is to provide customers with land, water foundation engineering technical consultation, construction services and other comprehensive solutions of the entity enterprise.Contact Number: 400-100-2850
