Deep replacement dynamic compaction gravel pile soil foundation reinforcing method

Abstract

The invention discloses a deep replacement dynamic compaction gravel pile soil foundation reinforcing method. High-pressure equipment is adopted for high-pressure jet so as to impact and damage a soilbody, fine soil materials come up to the water surface along with slurry, and are stirred and mixed with the slurry and realigned regularly according to the proportion, a consolidation body can be formed in soil, the consolidation body and the soil between piles jointly constitute a composite foundation, thus the bearing capacity of the foundation is improved, deformation of the foundation is reduced, the purpose of reinforcing the foundation is achieved, and the deep replacement dynamic compaction gravel pile soil foundation reinforcing method has the advantages of easy construction and highsoil foundation strength.

Description

technical field [0001] The invention relates to the field of building construction methods, in particular to a soil foundation reinforcement method for deep displacement dynamic rammed stone piles. Background technique [0002] When building buildings or filling embankments or sites on soft soil or soft soil foundation, because the bearing capacity of the foundation is very low, it is often necessary to carry out foundation reinforcement treatment. Cement mixing piles are a commonly used foundation reinforcement treatment method. But there are following problems in existing cement mixing pile: [0003] (1) The strength of the pile body is low. The uniformity of mixing cement and soil in the existing cement mixing pile is poor, and the strength of the pile body is low, generally 1-1.3MPa; [0004] (2) Poor stratum adaptability. Existing cement mixing piles are not easy to form piles in silty soil and silt formations, and the pile strength often fails to meet the design req...

AI Technical Summary

Problems solved by technology

[0003] (1) The strength of the pile body is low

The uniformity of mixing cement and soil in the existing cement mixing pile is poor, and the strength of the pile body is low, generally 1-1.3MPa;

[0004] (2) Poor formation adaptability

Existing cement mixing piles are not easy to form piles in silty soil and silt formations, and the pile strength often fails to meet the design requirements and the pile breaks;

[0005] (3) The vertical bearing capacity of single pile is low

The cement and soil bonding ability of the existing cement mixing pile body is not strong, the compactness of the pile body is not enough, and the vertical bearing capacity of a single pile is low, generally 80-120kN;

[0006] (4) The bearing capacity of the composite foundation is not high

During the pile-forming process of the existing cement mixing pile, the soil around the pile is disturbed to a certain extent, the cohesion between the pile body and the soil between the piles is not strong, and the bearing capacity of the composite foundation is not high, generally 100-150kPa;

[0007] (5) Poor penetration resistance

Due to the poor bonding ability of cement and soil, existing cement mixing piles often leak water when used in water-stop curtains