cfg桩地基处理沉降计算
Introduction
CFG pile foundation is a type of pile foundation that is widely used in China for its remarkable performance in dealing with soil subsidence. The foundation is composed of a cluster of cement-fly ash-gravel (CFG) piles that are drilled into the ground and reinforced with steel. In this article, we will elaborate on the calculation of soil subsidence for CFG pile foundation and explain the related concepts in detail.
Calculation of soil subsidence for CFG pile foundation
The calculation of soil subsidence for CFG pile foundation is based on the soil deformation caused by the load of the foundation and the deformation of the CFG pile. The subsidence calculation formula is as follows:
Δh= (q-Δqs)*Gd+s * Σ(ri^2/6 * Bi)
Where:
Δh: soil subsidence;
q: load of foundation;
Δqs: incremental stress of pile;
Gd: unit soil deformation modulus;
s: pile spacing;
ri: radius of CFG pile;
Bi: thickness of CFG pile.
The calculation process mainly involves the determination of soil deformation modulus and the measurement of pile parameters, which needs to be carried out by professional engineers with solid knowledge of engineering mechanics, soil mechanics and material mechanics.
Related questions
1. What are the advantages of CFG pile foundation over other types of pile foundation?
CFG pile foundation has the following advantages over other types of pile foundation:
Strong bearing capacity: The CFG pile has high compressive strength and bending resistance, which makes the foundation able to bear large loads.
Good stability: The CFG pile foundation is highly stable, even in complex geological conditions or high groundwater levels.
Low carbon emissions: The production process of CFG pile foundation has low carbon emissions, which is environmentally friendly and sustainable.
2. What are the considerations for selecting CFG pile foundation?
The selection of CFG pile foundation should take into account the following factors:
Geological conditions: The geological conditions of the construction site, such as soil properties and underground water level, are the key factors for selecting CFG pile foundation.
Load requirements: The load requirements should be taken into account to determine the size and number of piles required for the foundation.
Construction cost: The construction cost of CFG pile foundation depends on the pile parameters and the construction process, which should be considered in the selection process.
3. How to ensure the quality of CFG pile foundation construction?
The quality of CFG pile foundation construction can be ensured by the following measures:
Inspection and testing: Regular inspection and testing should be conducted during the construction process to ensure the quality of pile placement, compaction and reinforcement.
Material selection: The materials used for CFG pile foundation should meet the design and quality requirements, and the production and transportation process should be strictly controlled.
Construction management: The construction management should be carried out by professionals with solid knowledge of engineering mechanics, soil mechanics and material mechanics, and the process should be strictly monitored and controlled.
Conclusion
CFG pile foundation is an effective solution for soil subsidence control in civil engineering projects. The calculation of soil subsidence for CFG pile foundation involves complex engineering mechanics and soil mechanics, and should be carried out by professionals with solid knowledge and experience. In the selection and construction process of CFG pile foundation, attention should be paid to various factors to ensure the quality and safety of the construction project.
