A construction method for real-time monitoring of the rotary spraying process

Abstract

The invention discloses a construction method for monitoring the rotary injection process in real time, and belongs to the technology for monitoring the construction quality of rotary injection pilesin the foundation treatment field. The construction method comprises the following specific construction steps that prepares of a rotary injection construction field are made, and pre-drilling work iscompleted; a rotary injection drill bit and a drill rod are arranged and modified, and a rotary injection drilling machine is in position; the rotary injection dynamic construction scheme is confirmed; the dynamic monitoring scheme of the rotary injection construction process is confirmed; rotary injection work is carried out; and rotary injection construction work is completed. In a three-stagenozzle manner, nozzle conversion is carried out under the condition that a drilling rod does not need to be lifted out, then the slurry injection flow is changed, and the diameter of a rotary injection pile is controlled; a three-stage transient electromagnetic meter collector is arranged to collect electromagnetic waves, a signal collector with targeted precision is adopted for signals of different frequencies, and data processing mismatching caused by too large precision is avoided; and through a transient electromagnetic method, visual construction is carried out on deep hidden engineering,and the aim of real-time monitoring is achieved.

Description

technical field [0001] The invention relates to the construction quality monitoring technology of rotary grouting piles in the field of foundation treatment, in particular to a construction method for real-time monitoring of the rotary grouting process. Background technique [0002] High-pressure rotary grouting piles have been widely used in various foundation projects, such as building foundations, foundation pit enclosure, shield entry and exit reinforcement, embankment seepage prevention, existing building foundation reinforcement, slope reinforcement, tunnel advance support, etc. . [0003] The high-pressure rotary grouting drilling rig is the key construction equipment for the high-pressure rotary grouting pile, and it cooperates with the high-pressure mud pump, high-pressure water pump or air compressor to complete the high-pressure rotary grouting construction. High-pressure jet grouting technology is to use a drilling rig to drill a grouting pipe with a nozzle into...

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Problems solved by technology

[0004] At present, there is a particularly serious problem in the construction process of rotary grouting piles, that is, the diameter of the pile cannot be dynamically monitored during the construction process, and the quality of the pile can only be inspected by the posterior method after the construction is completed.

But for the posterior method, the problem is that even if the pile diameter is found to be too small, it is difficult to take remedial measures; if the pile diameter is found to be too large, it is impossible to make up for the waste of materials

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