Allowable range of pile position deviation of cement mixing pile

According to national codes and relevant process standards, the allowable range of pile position deviation of cement mixing pile is as follows:

1, cement-soil mixing pile: allowable pile position deviation "50mm；; Allowable verticality deviation ≤1%;

2. Plain concrete or cement fly ash gravel pile: allowable pile position deviation (whole pile ≤0.40D, strip foundation pile ≤ 0.25 d); Allowable verticality deviation ≤ 65438 0.5%;

3. Compacted cement-soil pile: allowable deviation of pile position (whole pile ≤0.40D, strip foundation pile ≤ 0.25 d); Allowable verticality deviation ≤ 65438 0.5%;

4. Column hammer punching and expanding gravel pile: allowable pile position deviation ≤ 50 mm; Allowable verticality deviation ≤ 65438 0.5%;

5. Concrete bored piles: allowable pile position deviation (1~3 piles, single row of side piles and group of side piles ≤ 70 mm; Single row axial, pile in pile group ≤150 mm); Allowable verticality deviation ≤ 65438 0.0%;

Scope of application:

The construction technology of cement-soil mixing pile is divided into mud mixing method (hereinafter referred to as wet method) and powder mixing method (hereinafter referred to as dry method). It is suitable for treating silt, muddy soil, plain fill, soft plastic cohesive soil, loose-medium dense silt, slightly dense-medium dense silt, loose-slightly dense medium coarse sand, gravel sand, loess and other soil layers.

It is not suitable for miscellaneous fill, hard plastic hard cohesive soil, dense sandy soil and soil layer with groundwater seepage affecting pile quality. Dry method is not suitable when the natural water content of local foundation soil is less than 30% (loess water content is less than 25%) and more than 70%. In winter construction in cold areas, the influence of negative temperature on treatment effect should be considered.

Refer to the above content: Baidu Encyclopedia-Cement Mixing Pile