The invention relates to the field of
geotechnical engineering construction monitoring, and discloses an intelligent
monitoring system and method for the construction quality of a
cement mixing
pile, and the
system comprises a front-end sensing subsystem, an industrial control center and an
execution control subsystem. The method comprises the following steps: fusing Beidou RTK elevation and
encoder displacement data to generate an endogenous credible depth reference; constructing a stratum impedance
fingerprint model by using the current and speed data of the drilling stage; and in the lifting grouting stage, the
drill lifting speed is planned in a feedforward mode according to the model, the grouting flow is adjusted in a follow-up mode according to the actual
drill lifting speed, meanwhile, the grouting effect is monitored by calculating the lubricating efficiency index, and multi-mode closed-loop correction is executed. According to the method, by establishing a stratum
digital mapping and flow
machine coupling control mechanism, the problems that the depth measurement error is large, construction parameters are not matched with the stratum, and quality evaluation lags behind are solved, and self-
adaptive control and whole-
process quality supervision of
pile foundation construction are achieved.