Application Advantages of High-Pressure Rotary Jet Drilling Rigs in Soft Soil Foundation

Application Advantages of High-Pressure Rotary Jet Drilling Rigs in Soft Soil Foundation

High-pressure rotary jet drilling rigs have unique technical and construction advantages in soft soil foundation reinforcement, solving the problems of low bearing capacity, easy settlement, poor stability, and difficult reinforcement of soft soil strata such as silt, mucky soil, and fill soil. First, it has strong stratum adaptability to soft soil. Soft soil has the characteristics of high water content, large porosity, and low strength. The high-pressure jet technology can effectively cut and break loose soft soil structures, fully mix cement slurry with soft soil particles, and eliminate stratum porosity and water seepage channels, which is difficult for traditional compaction and grouting technologies to achieve. Second, the reinforcement effect is uniform and stable. The rotary lifting construction mode ensures full coverage of jet grouting in the reinforcement range, forming continuous and uniform high-strength consolidated piles. 

The composite foundation formed by piles and soil effectively improves the overall bearing capacity of soft soil foundations and reduces uneven settlement. Third, the construction disturbance is small. Compared with foundation piling and deep mixing methods, high-pressure rotary jet drilling has small vibration and soil squeezing effect, will not cause excessive deformation and damage to surrounding soft soil and adjacent buildings, and is suitable for soft soil foundation reinforcement in urban dense building areas. Fourth, the construction flexibility is high. The equipment can adjust jet pressure, lifting speed, and pile diameter parameters according to soft soil thickness and softening degree, realizing targeted local reinforcement and overall foundation reinforcement, adapting to variable soft soil stratum distribution. Fifth, it has dual functions of reinforcement and anti-seepage. The rotary jet consolidated body forms a closed anti-seepage curtain in soft soil, reduces foundation water content, accelerates soft soil consolidation and hardening, and solves the problem of long-term deformation instability of soft soil foundations. In addition, the construction speed is fast, with short pile solidification cycle and quick foundation strength formation, which can effectively shorten the soft soil foundation treatment cycle and reduce engineering construction costs.