System and method for monitoring quality of jet grouting pile while drilling based on stratum multi-physics field sensing

Abstract

The invention provides a stratum multi-physics field sensing jet grouting pile while-drilling quality monitoring system and method. The monitoring system comprises a while-drilling multi-physics field sensing probe rod which is used for synchronously moving along with a drill rod in a drill hole and collecting multi-physics field response signals of a stratum around the drill hole; the pile machine parameter acquisition unit is used for acquiring mechanical parameters in the construction process of the high-pressure jet grouting pile; the ground data aggregation station is used for receiving and cooperatively analyzing the multi-physics field response signals and the mechanical parameters so as to carry out real-time diagnosis and early warning on the pile forming quality; according to the method, on the premise that normal construction is not interfered, the multi-physical-field state change of the stratum around the pile can be sensed in real time and in situ while drilling, collaborative analysis with construction parameters can be achieved, and therefore pile forming quality process control and pre-judgment are achieved.

Description

Technical Field

[0001] This invention belongs to the field of intelligent monitoring technology for civil engineering construction, specifically relating to a jet grouting pile drilling quality monitoring system and method based on multi-physical field sensing of the strata. Background Technology

[0002] High-pressure jet grouting piles, as a mature foundation treatment technology, directly impact engineering safety through their pile formation quality. Currently, quality monitoring during construction primarily relies on the collection and monitoring of input mechanical parameters such as grouting pressure, flow rate, and lifting speed—an open-loop monitoring model. This model has significant limitations: First, it cannot perceive the actual diffusion pattern of the grout after injection into the stratum, the pile diameter, and the disturbance to the surrounding soil, rendering the construction process invisible. Second, the final pile quality evaluation is severely delayed, relying entirely on destructive and time-consuming testing methods such as core sampling and static load testing after pile formation, failing to detect and correct defects such as broken piles, reduced diameter, and grout loss in real time during construction.

[0003] In recent years, although some external monitoring devices have emerged, their functions are still limited to the shallow acquisition of the aforementioned mechanical parameters, failing to provide a deeper understanding of the physical essence of the interaction between soil and rock mass and construction techniques. In particular, there is a lack of means to capture and analyze the real-time response signals of multiple physical fields generated by the strata during the core processes of high-pressure jet cutting, mixing, and soil replacement, such as vibration, acoustic emission, and resistivity. Due to the lack of direct feedback information from the strata, existing technologies struggle to provide real-time diagnosis and early warning of pile quality, hindering refined control and process optimization during construction.

[0004] Therefore, there is an urgent need for a monitoring technology solution that can sense changes in the multi-physical field state of the strata around the pile in real time and in situ without interfering with normal construction, and can be analyzed in conjunction with construction parameters to achieve process control and prediction of pile quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a jet grouting pile drilling quality monitoring system and method that can sense changes in the multi-physical field state of the strata around the pile in real time and in situ without interfering with normal construction, and can analyze these changes in conjunction with construction parameters, thereby achieving process control and prediction of pile quality.

[0006] The technical solution of this invention is: a multi-physics field sensing system for jet grouting pile drilling quality monitoring, comprising:

[0007] The multi-physics field sensing probe is used to move synchronously with the drill rod inside the borehole and collect multi-physics field response signals of the formation around the borehole.

[0008] The pile driver parameter acquisition unit is used to collect mechanical parameters during the construction of high-pressure jet grouting piles;

[0009] The ground data aggregation station is used to receive and collaboratively analyze the multiphysics response signals and the mechanical parameters to perform real-time diagnosis and early warning of pile quality.

[0010] Furthermore, the drilling multiphysics sensing probe includes a tube body, inside which are installed a triaxial vibration accelerometer for acquiring vibration signals, a broadband acoustic emission sensor for acquiring acoustic emission signals, and a four-electrode resistivity measurement module for measuring formation apparent resistivity.

[0011] The electrodes of the four-electrode resistivity measurement module are embedded in the insulating layer on the outer wall of the tube.

[0012] Furthermore, the tube body is also equipped with an embedded temperature sensor and a data acquisition and wireless transmission module.

[0013] Furthermore, the pile driver parameter acquisition unit includes a slurry pressure and flow meter for acquiring slurry pressure and flow rate, a depth encoder, an inclination sensor for monitoring the pile driver's attitude, and a positioning module.

[0014] Furthermore, the ground data aggregation station has a built-in diagnostic rule base, which includes pre-set quality anomaly diagnostic logic based on the coordinated change relationship between the multi-physics response signal and the mechanical parameters.

[0015] Furthermore, the quality anomaly diagnosis logic includes:

[0016] When abnormal slurry pressure or flow parameters are detected, simultaneously check whether there are coordinated abrupt changes in vibration signal energy, acoustic emission event rate and apparent resistivity.

[0017] If a co-mutation occurs, it is determined that slurry loss or splitting anomaly has occurred.

[0018] Furthermore, the drilling multiphysics sensing probe is equipped with standard drill pipe joints at both ends, and the tube body is a high-strength alloy shell coated with a wear-resistant coating.

[0019] A method for monitoring the quality of jet grouting piles while drilling using a multi-physics field sensing system, characterized by the following steps:

[0020] S1: During the jet grouting pile construction process, mechanical parameters are acquired in real time through the pile driver parameter acquisition unit;

[0021] S2: The multi-physics field response signal of the formation around the borehole is acquired in real time during drilling through the multi-physics field sensing probe.

[0022] S3: In the ground data aggregation station, the mechanical parameters and the multi-physics response signals are analyzed collaboratively, and real-time quality diagnosis and early warning are performed on the continuity of the pile body, the uniformity of grout diffusion, or the degree of ground disturbance according to the preset diagnostic rules.

[0023] Furthermore, in S3, the logic for diagnosing the continuity of the pile includes:

[0024] Within a specific depth range, if the mechanical parameters remain stable, but the vibration signal energy, acoustic emission event rate, and apparent resistivity change values ​​all show significant attenuation or interruption, an early warning of pile continuity anomaly will be triggered.

[0025] Furthermore, in S2, during the drilling stage, vibration signals and acoustic emission signals are mainly used to initially delineate the soil layer interfaces;

[0026] During the jet grouting stage, vibration spectrum, acoustic emission event rate, apparent resistivity and temperature signals are collected simultaneously and fused with mechanical parameters for analysis.

[0027] The beneficial effects of this invention are:

[0028] (1) In this invention, by using a multi-physics field sensing probe while drilling, physical quantities that directly reflect changes in the formation state, such as vibration, acoustic emission, and resistivity, are introduced into the construction process monitoring. This allows for the real-time capture of the mechanical, acoustic, and electrical responses of the formation under the action of high-pressure jets. This upgrades the traditional mode of only monitoring input mechanical parameters to a closed-loop intelligent sensing mode that synchronously senses input and formation feedback, making the pile-forming process transparent.

[0029] (2) By establishing collaborative analysis rules and diagnostic logic for mechanical parameters and multi-physics response signals, the system can judge the continuity of the pile, the uniformity of grout diffusion and the degree of stratum disturbance in real time during construction. Once abnormal features such as broken piles, reduced diameter and grout loss are detected, an early warning can be issued immediately, thereby advancing the quality control node from post-construction detection to process intervention at the moment of construction, realizing the transformation from post-construction remediation to process control.

[0030] (3) The vibration spectrum, acoustic emission event rate, resistivity dynamic profile and other data acquired by the system can be analyzed to not only evaluate the quality of a single pile, but also provide direct scientific basis based on the ground response for optimizing key process parameters such as jetting pressure, lifting speed and rotation speed under different strata conditions, and help achieve refined and customized high-efficiency construction.

[0031] (4) No structural modifications are required to the existing jet grouting machine host. It can work simply by being connected to the drill rod sequence as a special drill rod. This external design makes the system have the advantages of fast installation, wide applicability, and no interference with the normal construction process, which makes it easy to promote and apply in various engineering projects. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the drilling quality monitoring system for jet grouting piles with multi-physics field sensing in the formation, as described in this invention.

[0033] Figure 2 This is a schematic diagram of the pile foundation parameter acquisition unit in this invention.

[0034] Figure 3 This is a schematic diagram of the structure of the multi-physics field sensing drill pipe in this invention. Detailed Implementation

[0035] Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the invention or its application or use. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0036] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, without excluding the possibility of encompassing other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] like Figures 1 to 3 As shown, a multi-physics field sensing system for monitoring the quality of jet grouting piles while drilling is disclosed, comprising:

[0038] The multiphysics field sensing probe 10 is used to move synchronously with the drill pipe inside the borehole and collect the multiphysics field response signals of the formation around the borehole.

[0039] The pile driver parameter acquisition unit 20 is used to collect mechanical parameters during the construction of high-pressure jet grouting piles;

[0040] Ground data aggregation station 30 is used to receive and collaboratively analyze multi-physics response signals and mechanical parameters to perform real-time diagnosis and early warning of pile quality.

[0041] In some embodiments, the drilling multiphysics sensing probe 10 includes a tube body 11, inside which are disposed a triaxial vibration accelerometer 12 for acquiring vibration signals, a broadband acoustic emission sensor 13 for acquiring acoustic emission signals, and a four-electrode resistivity measurement module 14 for measuring formation apparent resistivity.

[0042] The electrodes of the four-electrode resistivity measurement module 14 are embedded in the insulating layer of the outer wall of the tube 11.

[0043] The insulating layer serves to ensure insulation between the four measuring electrodes and between the electrodes and the conductive metal tube, preventing the measuring current from short-circuiting through the tube itself, thus ensuring that the measuring signal originates from the ground and is authentic and reliable. As an example of an insulating layer, it is a zirconia ceramic ring.

[0044] Among them, the principle of the triaxial vibration accelerometer 12 is to sense the vibration acceleration of the drill rod in the axial and radial directions. In the jet grouting construction, the impact of the high-pressure jet, the cutting of the soil, and the friction between the drill rod and the borehole wall will generate specific vibration signals. Different strata such as soft soil, sand, and gravel have different response stiffness to the impact, and the grout diffusion state will also change the transmission of vibration energy. By analyzing the amplitude and spectrum characteristics of the vibration signal, the changes in the mechanical properties of the strata and the state of construction disturbance can be inverted. The principle of the broadband acoustic emission sensor 13 is to capture the high-frequency stress waves released in the strata due to events such as micro-fracture, particle friction, and grout flow. When the high-pressure jet splits the soil and the cement grout replaces the pore water, a large number of acoustic emission events will be generated. By monitoring its event rate, energy, and spectrum, it is possible to monitor and locate the structural damage of the strata and the dynamics of the grout in real time during construction. It is a direct means to judge the range of grout action and the activity of the strata response. The principle of the four-electrode resistivity measurement module 14 is based on the difference in conductivity of soil and rock. The conductivity of undisturbed soil and cement grout is significantly different. This module calculates the apparent resistivity of the strata surrounding the borehole by injecting a measuring current of a specific frequency into the formation and measuring the potential difference. As the grout is injected and replaces or mixes with the original soil, its resistivity systematically decreases. By monitoring the resistivity profile over depth and time, the diffusion range and uniformity of the grout can be indirectly depicted, providing electrical evidence for the quality of pile formation.

[0045] Specifically, the three sensors—a triaxial vibration accelerometer 12, a broadband acoustic emission sensor 13, and a four-electrode resistivity measurement module 14—are integrated inside the same tube to ensure that they are in the same measurement position and spatiotemporal reference. This is crucial for subsequent multi-source signal collaborative analysis. Only vibration, acoustic emission, and resistivity data acquired at the same time and depth point have real physical meaning in their coupling relationship and can be used for reliable quality diagnosis.

[0046] In some embodiments, the tube body 11 is further provided with an embedded temperature sensor 15 and a data acquisition and wireless transmission module 16; wherein, the triaxial vibration accelerometer 12, the broadband acoustic emission sensor 13, the four-electrode resistivity measurement module 14 and the embedded temperature sensor 15 are all connected to the data acquisition and wireless transmission module 16.

[0047] Specifically, cement-based grout releases heat during hydration, causing the temperature of itself and the surrounding medium to rise. This temperature field change is a direct physical characterization of the grout's presence, flow, and chemical reaction processes. In the jet grouting section, the detected abnormal temperature rise can serve as independent evidence that the grout has reached and acted upon that depth. If no temperature rise is detected in the preset grouting section, it may indicate abnormalities such as grout not reaching the target depth, loss, or severe dilution, providing cross-validation for the diagnostic conclusions of vibration, acoustic emission, and resistivity. The rate and peak value of temperature rise can indirectly reflect the activity of the cement hydration reaction, assisting in judging the grout's setting state and providing a reference for subsequent construction scheduling. Embedding the temperature sensor inside the tube allows it to be located close to other core sensors, ensuring that the measured temperature environment is strictly consistent with the measurement environment of other physical fields. At the same time, the internal encapsulation provides physical protection and thermal buffering, making its measured values ​​more stably reflect the overall thermal environment at the depth where the probe is located, rather than the instantaneous, localized fluid scouring temperature. As an example, the embedded temperature sensor 15 is a PT100 platinum resistance thermometer. The data acquisition and wireless transmission module 16 is a highly integrated embedded system that includes an analog-to-digital converter, a microprocessor, a storage unit, a wireless transceiver, and a built-in power supply. Its working principle is to synchronously acquire analog signals generated by all sensors, convert them into digital signals, perform preliminary processing and packaging, and then transmit them to the ground station through a wireless communication link.

[0048] In some embodiments, the pile driver parameter acquisition unit 20 includes a slurry pressure and flow meter 21 for acquiring slurry pressure and flow rate, a depth encoder 22, an inclination sensor 23 for monitoring the attitude of the pile driver, and a positioning module 24; the slurry pressure and flow meter 21 includes a pressure gauge and a flow meter for detecting slurry pressure and flow rate respectively; the positioning module 24 is a GNSS positioning directional antenna.

[0049] Among them, the slurry pressure and flow meter 21 directly monitors the two most critical construction input parameters, namely the pressure and material flow rate injected into the formation, which is the primary basis for judging whether the construction process is carried out according to the design; the depth encoder 22 provides a precise depth reference, ensuring that all collected mechanical parameters and formation physical field data can accurately correspond to the absolute depth, which is the basis for constructing vertical profiles and locating abnormal positions; the tilt sensor 23 and the positioning module 24 record the spatial posture and planar position of the pile body. Verticality affects the quality of pile formation, while position information ensures that the monitoring data is uniquely bound to the specific pile position, realizing quality traceability.

[0050] Specifically, any physical field response, such as increased ground vibration or decreased resistivity, must be considered in conjunction with current construction inputs such as pressure and flow rate to have clear diagnostic significance. For example, the same active acoustic emission may be normal fracturing during high-pressure grouting, but may indicate leakage under low pressure. By using a unified timestamp and depth coordinates, the system can strictly correlate the pressure and flow rate applied at a certain depth and time with the vibrations, acoustic and electrical responses generated in the ground at the same depth and time. This real-time coupling of input and response is the fundamental prerequisite for establishing effective diagnostic logic and achieving accurate process quality assessment.

[0051] In some embodiments, the ground data aggregation station 30 has a built-in diagnostic rule base, which includes pre-defined quality anomaly diagnostic logic based on the synergistic relationship between multi-physics response signals and mechanical parameters. The diagnostic rule base is essentially a series of formalized rules based on geotechnical engineering mechanisms and expert experience. Through programming logic, it performs real-time correlation and comprehensive analysis of multi-physics signals such as vibration, acoustic emission, and resistivity with mechanical parameters such as grout pressure and flow rate.

[0052] As a specific implementation of the quality anomaly diagnosis logic in the aforementioned diagnostic rule base, the quality anomaly diagnosis logic includes:

[0053] When abnormal slurry pressure or flow parameters are detected, simultaneously check whether there are coordinated abrupt changes in vibration signal energy, acoustic emission event rate and apparent resistivity.

[0054] If a co-mutation occurs, it is determined that slurry loss or splitting anomaly has occurred.

[0055] More specifically, in the diagnostic rule base, a rule named "slurry loss / splitting" is preset, and its triggering conditions and specific parameters for collaborative judgment logic are set as follows:

[0056] Level 1 trigger condition (abnormal mechanical parameters):

[0057] If the grouting pressure drops by more than 30% within 2 seconds, or the grouting flow rate increases abnormally by more than 25% within 2 seconds, while the pressure remains unchanged or decreases.

[0058] Second-level collaborative verification conditions (collaborative mutation of multi-physics signals):

[0059] When the first-level condition is met, the system immediately checks whether the following three signals change in tandem within the same time window:

[0060] Vibration signal energy: The effective value of vibration energy in the 50-500Hz frequency band suddenly increases by more than 100%;

[0061] Acoustic emission event rate: The effective acoustic emission event rate surged to more than 5 times the normal background value;

[0062] Apparent resistivity: The resistivity value drops sharply, with a rate of change exceeding 10% per second.

[0063] The system performs this diagnosis according to the following automated steps during construction:

[0064] The first step is continuous monitoring and triggering: The software background continuously monitors the slurry pressure and flow data stream. Once it detects that the value meets the preset abnormal triggering conditions within a short period of time, the collaborative diagnosis subroutine is immediately started.

[0065] The second step is data synchronous extraction: The system takes the moment when the abnormal mechanical parameters occur as the center and automatically extracts all relevant data within a closely related time window, including the original vibration signal, acoustic emission event stream and resistivity measurement sequence corresponding to that time period.

[0066] The third step is collaborative signal analysis: rapid calculation and analysis of the extracted multiphysics data to determine whether the three collaborative mutation verification conditions of sudden increase in vibration energy, surge in acoustic emission event rate and sudden drop in resistivity are simultaneously met.

[0067] The fourth step is comprehensive judgment and output: If the abnormal mechanical parameter triggering condition and all the multi-physics field collaborative mutation verification conditions are met, the diagnostic rule determines that slurry loss or splitting abnormality has occurred; the system then generates clear alarm information including the abnormality type, depth and timestamp, and provides audible and visual prompts.

[0068] In some embodiments, the multiphysics sensing probe 10 is provided with standard drill pipe joints at both ends, and the tube body 11 is a high-strength alloy shell coated with a wear-resistant coating.

[0069] Based on the monitoring system of any one of the above embodiments, a method for monitoring the quality of jet grouting piles while drilling with formation multi-physics field sensing is disclosed, comprising the following steps:

[0070] S1: During the jet grouting pile construction process, mechanical parameters are acquired in real time through the pile driver parameter acquisition unit;

[0071] S2: The multi-physics response signal of the formation around the borehole is acquired in real time during drilling by using a multi-physics field sensing probe.

[0072] S3: In the ground data aggregation station, mechanical parameters and multi-physics response signals are analyzed collaboratively, and real-time quality diagnosis and early warning are performed on pile continuity, grout diffusion uniformity or stratum disturbance degree according to preset diagnostic rules.

[0073] In some embodiments, S3 includes the following logic for diagnosing pile continuity:

[0074] Within a specific depth range, if the mechanical parameters remain stable, but the vibration signal energy, acoustic emission event rate, and apparent resistivity change values ​​all show significant attenuation or interruption, an early warning of pile continuity anomaly will be triggered.

[0075] Specifically, it includes the following steps:

[0076] Data slicing and feature extraction: The system uses depth as a benchmark to divide the real-time data streams of mechanical parameters, vibration, acoustic emission, and resistivity into continuous, equally spaced depth analysis intervals; within each interval, the system calculates the stability index of mechanical parameters such as slurry pressure and flow rate, and calculates the characteristic values ​​of three physical field signals: vibration signal energy, acoustic emission event rate, and resistivity change value.

[0077] Set quantitative judgment thresholds: Preset clear judgment thresholds; for example: stable mechanical parameters are defined as pressure and flow fluctuations being less than ±5% of the design value; significant signal attenuation or interruption is defined as: vibration energy decreasing by more than 50%, acoustic emission event rate decreasing below the background value, and resistivity change value approaching zero;

[0078] Collaborative logic judgment: For each depth interval, the system automatically performs a logic judgment: If the mechanical parameters are stable and the vibration energy, acoustic emission event rate, and resistivity change value all meet their respective attenuation or interruption conditions, then a pile continuity anomaly warning is triggered, and the depth range corresponding to the anomaly interval is recorded.

[0079] Warning output: After a warning is triggered, the system highlights the abnormal depth range on the operation interface and generates a diagnostic record.

[0080] While a single signal attenuation may be affected by local strata or accidental interference, the simultaneous occurrence of all three factors deviating from normal construction input constitutes strong evidence that the grout did not effectively act on the strata in that section, thus indicating a high probability of a continuity interruption in the pile body within that depth range. This multi-source information fusion judgment greatly improves the reliability and anti-interference capability of the diagnosis.

[0081] In some embodiments, S2, vibration signals and acoustic emission signals are mainly used to initially delineate the soil layer interface during the drilling stage;

[0082] During the jet grouting stage, vibration spectrum, acoustic emission event rate, apparent resistivity and temperature signals are collected simultaneously and fused with mechanical parameters for analysis.

[0083] Specifically, different rock and soil masses have different hardness, density, and integrity. When a drill bit cuts through different strata, the resistance it encounters varies, resulting in significant differences in the intensity and frequency components of the vibrations generated. Hard or dense strata typically produce vibrations with larger amplitudes and higher frequencies; when strata fracture under the pressure and cutting of the drill bit, or when particles rub against each other, elastic waves are released; different strata have different fracture characteristics, and the activity and intensity of acoustic emission also differ; combining changes in vibration energy and changes in acoustic emission activity for comprehensive judgment can corroborate each other, improving the accuracy and reliability of interface identification and avoiding misjudgments caused by local interference from a single signal.

[0084] The fusion analysis method involves: synchronously displaying and analyzing all signals with depth as the horizontal axis and time as the vertical axis to intuitively observe the coupling relationship of each parameter at each depth point; when mechanical parameters change, the system automatically correlates and checks whether the vibration, acoustic emission, and resistivity signals at the corresponding time show a coordinated response, and performs event diagnosis according to preset rules; comparing the vibration spectrum characteristics and resistivity profile before and after grouting to assess the degree of formation modification; and using the temperature rise range of the temperature curve to verify the effective range of the grout.

[0085] The various embodiments of the present invention have now been described in detail. To avoid obscuring the concept of the invention, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0086] The embodiments described above only illustrate some implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A multi-physics field sensing system for monitoring the quality of jet grouting piles during drilling, characterized in that, include: The multi-physics field sensing probe is used to move synchronously with the drill rod inside the borehole and collect multi-physics field response signals of the formation around the borehole. The pile driver parameter acquisition unit is used to collect mechanical parameters during the construction of high-pressure jet grouting piles; The ground data aggregation station is used to receive and collaboratively analyze the multiphysics response signals and the mechanical parameters to perform real-time diagnosis and early warning of pile quality.

2. The formation multi-physics field sensing jet grouting pile drilling quality monitoring system according to claim 1, characterized in that: The drilling multiphysics sensing probe includes a tube body, inside which are installed a triaxial vibration accelerometer for collecting vibration signals, a broadband acoustic emission sensor for collecting acoustic emission signals, and a four-electrode resistivity measurement module for measuring formation apparent resistivity. The electrodes of the four-electrode resistivity measurement module are embedded in the insulating layer on the outer wall of the tube.

3. The formation multi-physics field sensing jet grouting pile drilling quality monitoring system according to claim 2, characterized in that: The tube body is also equipped with an embedded temperature sensor and a data acquisition and wireless transmission module.

4. The formation multi-physics field sensing jet grouting pile drilling quality monitoring system according to claim 1, characterized in that: The pile driver parameter acquisition unit includes a slurry pressure and flow meter for acquiring slurry pressure and flow rate, a depth encoder, an inclination sensor for monitoring the pile driver's attitude, and a positioning module.

5. The formation multi-physics field sensing jet grouting pile drilling quality monitoring system according to claim 1, characterized in that: The ground data aggregation station has a built-in diagnostic rule base, which includes pre-set quality anomaly diagnostic logic based on the coordinated change relationship between the multi-physics response signal and the mechanical parameters.

6. The formation multi-physics field sensing jet grouting pile drilling quality monitoring system according to claim 5, characterized in that, The quality anomaly diagnosis logic includes: When abnormal slurry pressure or flow parameters are detected, simultaneously check whether there are coordinated abrupt changes in vibration signal energy, acoustic emission event rate and apparent resistivity. If a co-mutation occurs, it is determined that slurry loss or splitting anomaly has occurred.

7. The formation multi-physics field sensing jet grouting pile drilling quality monitoring system according to claim 2, characterized in that: The drilling multiphysics sensing probe is equipped with standard drill pipe joints at both ends, and the tube body is a high-strength alloy shell coated with a wear-resistant coating.

8. A method for monitoring the quality of jet grouting piles while drilling using multi-physics field sensing of the formation, employing the monitoring system described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1: During the jet grouting pile construction process, mechanical parameters are acquired in real time through the pile driver parameter acquisition unit; S2: The multi-physics field response signal of the formation around the borehole is acquired in real time during drilling through the multi-physics field sensing probe. S3: In the ground data aggregation station, the mechanical parameters and the multi-physics response signals are analyzed collaboratively, and real-time quality diagnosis and early warning are performed on the continuity of the pile body, the uniformity of grout diffusion, or the degree of ground disturbance according to the preset diagnostic rules.

9. The method for monitoring the quality of jet grouting piles while drilling based on multi-physics field sensing of the formation according to claim 8, characterized in that, In S3, the logic for diagnosing the continuity of the pile body includes: Within a specific depth range, if the mechanical parameters remain stable, but the vibration signal energy, acoustic emission event rate, and apparent resistivity change values ​​all show significant attenuation or interruption, an early warning of pile continuity anomaly will be triggered.

10. The method for monitoring the quality of jet grouting piles while drilling based on multi-physics field sensing of the formation according to claim 8, characterized in that, In S2, during the drilling stage, vibration signals and acoustic emission signals are mainly used to initially delineate the soil layer interfaces. During the jet grouting stage, vibration spectrum, acoustic emission event rate, apparent resistivity and temperature signals are collected simultaneously and fused with mechanical parameters for analysis.

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