As a common cement pre-product in our daily life, cement manhole covers are often used to cover water wells. There are also many manufacturers of pre- processing cement products , and different cement manhole cover manufacturers produce products with different quality and service life. Also different in length.
Dongguan cement pre-made products
1. The influence of root shape. When the ultimate bearing capacity is calculated using the ultimate load theoretical formula, it is considered in accordance with the strip foundation. For non-strip foundations, the influence of different shapes of foundation bearing should be considered.
2, the impact of the underlying layer. Determine the design value of the bearing capacity of the foundation holding layer, and analyze and check the impact of the underlying layer.
3. The influence of powder function on the limitation of cement manhole cover. In general, powders with high hardness, low plasticity, and high conflicts have poor limiting functions and can be properly improved by adding lubricants or molding agents. When the powder purity is low and the oxygen content is high, the restriction function is poor. The restoration treatment of the material powder can be overcome. The single fine particle or coarse particle powder and the regular shape powder are not ideal. Messy powder can be improved.
4. The influence of the shear strength of the cover layer. The higher the shear strength of the overburden above the base, the higher the foundation load. Therefore, the size of the foundation pit excavation and the quality of the construction backfill also affect the foundation load.
5. The influence of load tilt and migraine. When calculating the bearing capacity of a foundation using theoretical man-hours, they are all considered according to the central load, but the tilting load of the load has an influence on the bearing capacity of the foundation.
It ’s terrible. Five factors are needed to determine the life of a cement manhole cover. In fact, there are still many factors that affect the life of a cement manhole cover. The most basic are these five factors.