CN-122014238-A - System and method for monitoring drilling quality of jet grouting piles perceived by multiple physical fields of stratum

CN122014238ACN 122014238 ACN122014238 ACN 122014238ACN-122014238-A

Abstract

The invention provides a system and a method for monitoring drilling quality of a multi-physical-field-sensing jet grouting pile of a stratum, wherein the monitoring system comprises a multi-physical-field-sensing probe rod which moves synchronously with a drill rod in a drill hole and collects multi-physical-field response signals of stratum around the drill hole, a pile machine parameter collecting unit which is used for collecting mechanical parameters in the construction process of the high-pressure jet grouting pile, and a ground data gathering station which is used for receiving and cooperatively analyzing the multi-physical-field response signals and the mechanical parameters so as to diagnose and early warn the pile quality in real time.

Inventors

LI ZHUOMIN
ZHOU YAOCHEN
WU JIANQIU
WU YUANHAO
SUN MIN
DOU JINZHONG
Huang Shoule
WANG YONGXIN
GONG HAO

Assignees

中国建筑第八工程局有限公司

Dates

Publication Date: 20260512
Application Date: 20251223

Claims (10)

1. A multi-physical field sensing jet grouting pile while drilling quality monitoring system for a stratum, comprising: the multi-physical-field sensing probe rod while drilling is used for synchronously moving along with the drill rod in a drilling hole and collecting multi-physical-field response signals of stratum around the drilling hole; The pile machine parameter acquisition unit is used for acquiring mechanical parameters in the construction process of the high-pressure jet grouting pile; And the ground data convergence station is used for receiving and cooperatively analyzing the multi-physical-field response signals and the mechanical parameters so as to diagnose and early warn the pile quality in real time.
2. The system for monitoring the while-drilling quality of the multi-physical-field-sensing jet grouting pile of the stratum is characterized in that the while-drilling multi-physical-field-sensing probe rod comprises a pipe body, and a triaxial vibration accelerometer for collecting vibration signals, a broadband acoustic emission sensor for collecting acoustic emission signals and a four-electrode resistivity measuring module for measuring the apparent resistivity of the stratum are arranged inside the pipe body; the electrodes of the four-electrode resistivity measuring module are embedded in an insulating layer on the outer wall of the pipe body.
3. The multi-physical-field-sensing rotary jet grouting pile while-drilling quality monitoring system of the stratum is characterized in that an embedded temperature sensor and a data acquisition and wireless transmission module are further arranged in the pipe body.
4. The system for monitoring the while-drilling quality of the jet grouting pile perceived by multiple physical fields of a stratum according to claim 1, wherein the pile machine parameter acquisition unit comprises a slurry pressure flowmeter for acquiring slurry pressure and flow, a depth encoder, an inclination angle sensor for monitoring the posture of the pile machine and a positioning module.
5. The system for monitoring the while-drilling quality of the jet grouting pile perceived by a plurality of physical fields of a stratum according to claim 1, wherein the ground data convergence station is internally provided with a diagnosis rule base, and the diagnosis rule base comprises quality abnormality diagnosis logic preset on the basis of the cooperative change relation between the response signals of the physical fields and the mechanical parameters.
6. The formation multi-physical field aware jet grouting pile while drilling quality monitoring system of claim 5, wherein the quality anomaly diagnostic logic comprises: When abnormal slurry pressure or flow parameters are monitored, synchronously checking whether the vibration signal energy, the acoustic emission event rate and the apparent resistivity are subjected to cooperative mutation; if the cooperative mutation occurs, the slurry loss or cleavage abnormality is judged to occur.
7. The system for monitoring the while-drilling quality of the multi-physical-field sensing jet grouting pile of the stratum according to claim 2, wherein standard drill rod joints are arranged at two ends of the while-drilling multi-physical-field sensing probe rod, and the pipe body is a high-strength alloy shell and is sprayed with a wear-resistant coating.
8. A method for monitoring the while-drilling quality of a jet grouting pile perceived by a plurality of physical fields of a stratum, which adopts a monitoring system as claimed in any one of claims 1 to 7, and is characterized by comprising the following steps: S1, acquiring mechanical parameters in real time through the pile machine parameter acquisition unit in the construction process of the jet grouting pile; S2, acquiring multi-physical-field response signals of formations around a borehole in real time while drilling through the multi-physical-field sensing probe while drilling; And S3, in the ground data convergence station, cooperatively analyzing the mechanical parameters and the multi-physical-field response signals, and carrying out real-time quality diagnosis and early warning on pile continuity, slurry diffusion uniformity or stratum disturbance degree according to a preset diagnosis rule.
9. The method for monitoring the quality of a jet grouting pile while drilling perceived by a plurality of physical fields of a stratum according to claim 8, wherein in S3, the logic for diagnosing the continuity of the pile body comprises: In a specific depth interval, if the mechanical parameters are stable, but the vibration signal energy, the acoustic emission event rate and the apparent resistivity change value are obviously attenuated or interrupted at the same time, the pile body continuity abnormality early warning is triggered.
10. The method for monitoring the quality of the jet grouting pile while drilling perceived by a plurality of physical fields of a stratum according to claim 8, wherein in the step S2, a soil layer interface is primarily divided by mainly utilizing vibration signals and acoustic emission signals in a drilling stage; in the rotary jetting grouting stage, vibration spectrum, acoustic emission event rate, apparent resistivity and temperature signals are synchronously acquired, and fusion analysis is carried out with mechanical parameters.

Description

System and method for monitoring drilling quality of jet grouting piles perceived by multiple physical fields of stratum Technical Field The invention belongs to the technical field of civil engineering construction intelligent monitoring, and particularly relates to a system and a method for monitoring the while-drilling quality of a jet grouting pile perceived by multiple physical fields of a stratum. Background The high-pressure jet grouting pile is used as a mature foundation treatment technology, and the pile forming quality directly influences engineering safety. Currently, quality monitoring in the construction process mainly relies on acquisition and monitoring of input mechanical parameters such as grouting pressure, flow, lifting speed and the like, and belongs to an open-loop monitoring mode. The mode has obvious limitations that firstly, the actual diffusion form, the diameter size of the pile and the disturbance state of surrounding soil after grout is injected into a stratum cannot be perceived, so that the construction process is invisible, secondly, the final pile body quality evaluation is seriously delayed, the method completely depends on the detection methods of core drilling sampling, static load test and the like after pile forming, which are damaged and have long period, and the defects of pile breaking, diameter shrinkage, grout loss and the like cannot be found and corrected in real time in the construction process. In recent years, some externally-hung monitoring devices are appeared, but the functions of the externally-hung monitoring devices are still limited to shallow collection of the mechanical parameters, and the deeply-hung monitoring devices cannot be perceived from the physical essence level of interaction between a rock-soil body and a construction process. Particularly, the method lacks a means for capturing and analyzing the real-time response signals of a plurality of physical fields such as vibration, acoustic emission, resistivity and the like generated by the stratum in the core process of cutting, stirring and replacing the soil body by the high-pressure jet flow. Because of the lack of direct feedback information of stratum, the prior art is difficult to diagnose and early warn piling quality in real time, and restricts the fine control and process optimization of the construction process. Therefore, the monitoring technical scheme for realizing pile quality process control and prejudgment is urgently needed, wherein the multi-physical-field state change of the surrounding stratum of the pile can be perceived in real time and in situ while drilling on the premise of not interfering with normal construction, and the multi-physical-field state change can be cooperatively analyzed with construction parameters. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides a system and a method for monitoring the quality of the jet grouting pile while drilling, which can sense the state change of multiple physical fields of the stratum around the pile in real time while drilling and in situ on the premise of not interfering with normal construction, and can be used for cooperatively analyzing construction parameters, thereby realizing the quality process control of the pile and the pre-judgment of the multi physical field sensing of the stratum. The technical scheme of the invention is that the system for monitoring the quality of the jet grouting pile while drilling with multi-physical field perception of the stratum comprises the following components: the multi-physical-field sensing probe rod while drilling is used for synchronously moving along with the drill rod in a drilling hole and collecting multi-physical-field response signals of stratum around the drilling hole; The pile machine parameter acquisition unit is used for acquiring mechanical parameters in the construction process of the high-pressure jet grouting pile; And the ground data convergence station is used for receiving and cooperatively analyzing the multi-physical-field response signals and the mechanical parameters so as to diagnose and early warn the pile quality in real time. Further, the multi-physical-field sensing probe while drilling comprises a pipe body, wherein a triaxial vibration accelerometer for collecting vibration signals, a broadband acoustic emission sensor for collecting acoustic emission signals and a four-electrode resistivity measuring module for measuring formation apparent resistivity are arranged in the pipe body; the electrodes of the four-electrode resistivity measuring module are embedded in an insulating layer on the outer wall of the pipe body. Further, an embedded temperature sensor and a data acquisition and wireless transmission module are arranged in the pipe body. Further, the pile machine parameter acquisition unit comprises a slurry pressure flowmeter for acquiring slurry pressure and flow, a depth encoder, an inclination sensor