A method for early warning and feedback during foundation treatment construction.

Abstract

This invention discloses an early warning and feedback method for foundation treatment construction, relating to the field of construction early warning technology. It addresses the problem of shallow overheating and sintering leading to severe energy attenuation in deeper layers. The method involves reshaping the foundation area under test and dividing the reshaped area into shallow and deep layers based on the burial depth. During microwave irradiation, the soil temperature at each reshaped layer's burial depth is collected in real time, and the temperature rise rate is calculated. The microwave distribution trend is quantified based on the average temperature rise rate and the extreme difference in temperature rise rate at the shallow layer, thereby determining whether there is a risk of thermal failure due to excessive energy accumulation or spatial imbalance in the shallow area. When a local overheating risk is detected, a feedback control mechanism is triggered to adaptively adjust the microwave irradiation power, irradiation rhythm, and regional irradiation sequence to weaken the instantaneous energy absorption intensity in the shallow layer and extend the time window for energy transfer to deeper layers. Through closed-loop control of early warning and feedback, the uniformity and reliability of foundation reinforcement are improved.

Description

Technical Field

[0001] This invention relates to the field of construction early warning technology, and more specifically, to a method for early warning and feedback during foundation treatment construction. Background Technology

[0002] Collapsible loess, due to its loose pore structure and sharp decrease in strength when exposed to water, is widely used in transportation, municipal, and energy infrastructure construction. For the reinforcement of this type of foundation, microwave reinforcement technology applies a high-frequency electromagnetic field to the soil, causing the water molecules inside the soil to polarize and the medium to be lost, thereby achieving volume heating, dehydration and consolidation, and structural densification. It is considered a new type of foundation treatment method with fast construction speed, high energy utilization rate, and minimal disturbance to the surrounding environment.

[0003] The existing technology has the following shortcomings:

[0004] Currently, existing technologies mostly employ fixed irradiation power and rhythm for microwave reinforcement of foundations. They rely solely on coarse-grained monitoring and empirical control based on surface or single-point burial depth temperatures, lacking regionalized thermal response monitoring and quantitative assessment mechanisms for microwave distribution trends across different burial depths. This makes it difficult to promptly suppress overheating caused by excessive local energy accumulation in shallow layers, leading to shallow overheating and sintering while deep layers experience severe energy attenuation, insufficient reinforcement, and the formation of hidden subsidence zones. Therefore, this paper proposes an early warning and feedback method for the foundation treatment construction process.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide an early warning and feedback method for the foundation treatment construction process. This method utilizes a regional reshaping and thermal response monitoring mechanism based on burial depth stratification, a microwave distribution trend quantitative assessment model, and a feedback regulation closed-loop control strategy driven by thermal failure risk to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for early warning and feedback during foundation treatment construction, comprising the following steps:

[0008] Step S1: At the start of microwave reinforcement construction, the area to be tested foundation is reshaped, the burial depth of each reshaped area is collected, and the location characteristics of each reshaped area are classified into shallow and deep levels according to the burial depth.

[0009] Step S2: Apply microwave irradiation to the foundation area to be tested, detect the temperature of the buried soil in each remolded area, assess the microwave distribution trend at the shallow level in combination with the location characteristics, and analyze the thermal failure risk status of the foundation area to be tested based on the microwave distribution trend.

[0010] Step S3: Determine whether to enter the feedback control mechanism based on the thermal failure risk status. When the feedback control mechanism is entered, access the construction database to retrieve the current irradiation power, adjust the current irradiation power using the microwave distribution trend, and then collect the deep-level thermal diffusion time.

[0011] Step S4: Set different cooling intervals based on thermal diffusion time, detect the microwave energy of each remodeling region and sort the remodeling regions. Combine the sorting results and cooling intervals to perform pulsed microwave irradiation treatment on each remodeling region.

[0012] In a preferred embodiment, in step S1, at the start of microwave reinforcement construction, the area to be tested foundation is subjected to regional reshaping treatment at the construction unit level.

[0013] Regional reshaping treatment refers to dividing the ground area to be tested into several independent and controllable reshaping areas according to the arrangement of microwave irradiation devices, with each reshaping area corresponding to a specific microwave irradiation device.

[0014] For each reshaping area, the corresponding burial depth is obtained. The burial depth is the vertical distance from the center point of microwave irradiation within the reshaping area to the ground reference surface.

[0015] In a preferred embodiment, in step S1, the burial depth is compared and analyzed with a preset layer division threshold. The layer division threshold is used to characterize the shallow and deep layers of the foundation area to be tested during microwave reinforcement construction, that is, the boundary position between the shallow dominant energy absorption zone and the deep effective reinforcement zone during the microwave energy transmission from the surface to the inside.

[0016] When the burial depth of the reconstructed area is less than the hierarchical division threshold, the location characteristics of the reconstructed area are determined to belong to the shallow level, and the reconstructed area is marked as a shallow level area.

[0017] When the burial depth of the reconstructed area is greater than or equal to the hierarchical classification threshold, the location characteristics of the reconstructed area are determined to belong to the deep level, and the reconstructed area is marked as a deep level area.

[0018] In a preferred embodiment, in step S2, microwave irradiation is applied to the foundation area to be tested, and during the microwave irradiation process, the soil temperature at the corresponding burial depth of each remodeling area is continuously monitored.

[0019] The temperature rise rate is calculated by the ratio of the soil temperature difference between two adjacent samples to the sampling time interval. The temperature rise rates of all shallow-level areas at the same sampling time are summarized, and the average shallow-level temperature rise rate is calculated to obtain the shallow average temperature rise rate.

[0020] The difference between the maximum and minimum temperature rise rates in the shallow layer is calculated as the extreme difference of temperature rise rates. The average temperature rise rate in the shallow layer and the extreme difference of temperature rise rates together constitute the microwave distribution trend in the shallow layer.

[0021] In a preferred embodiment, in step S2, the thermal failure risk status of the foundation area to be tested is analyzed based on the microwave distribution trend: the shallow average temperature rise rate is compared with the preset average temperature rise safety threshold. When the shallow average temperature rise rate exceeds the average temperature rise safety threshold, it is determined that the overall microwave energy absorption of the shallow layer is too strong, and there is a risk of excessive energy accumulation in the shallow layer.

[0022] At the same time, the extreme difference of temperature rise rate is compared with the preset extreme difference safety threshold. When the extreme difference of temperature rise rate exceeds the extreme difference safety threshold, it is determined that the microwave energy distribution in the shallow layer area is uneven, and energy superposition may occur in local areas, causing overheating.

[0023] When any of the judgment conditions are met, the thermal failure risk state of the foundation area to be tested is judged as a local overheating state; otherwise, the thermal failure risk state is judged as a controllable thermal response state.

[0024] In a preferred embodiment, in step S3, when the thermal failure risk state is local overheating, it is determined to enter the feedback control mechanism.

[0025] When the feedback control mechanism is activated, the current irradiation power is retrieved from the construction database.

[0026] The temperature rise rate is extracted by utilizing the microwave distribution trend. After standardizing the temperature rise rate, the temperature rise coefficient is obtained. The current irradiation power is adjusted based on the temperature rise coefficient to obtain the feedback-controlled irradiation power.

[0027] At the moment when the feedback regulation of irradiation power takes effect, the temperature of the buried soil in the deep remodeling area is obtained and used as the deep initiation temperature. The deep transmission cycle is preset and divided into multiple sampling times.

[0028] In a preferred embodiment, in step S3, the temperature of the buried soil in the deep remodeling area is collected at each sampling time to form a deep temperature sequence that varies with time.

[0029] In the deep temperature sequence, when the increase in deep soil temperature relative to the initial soil temperature first reaches the preset deep temperature rise threshold, the corresponding sampling time is determined as the time when deep heat arrives.

[0030] The deep thermal diffusion time is obtained based on the time difference between the arrival time of deep heat and the effective time of feedback-controlled irradiation power.

[0031] In a preferred embodiment, in step S4, the microwave configuration database is accessed to retrieve the basic cooling interval, the deep heat diffusion time is multiplied by the preset cooling ratio, and the basic cooling interval is superimposed to obtain the cooling interval of the remodeling region.

[0032] The product of the feedback-controlled irradiation power, the effective irradiation duration, and the preset energy absorption coefficient is taken as the microwave energy.

[0033] Among them, the effective irradiation on-time is the cumulative time during which the microwave generator is in the output state and the irradiation end applies microwave irradiation to the reshaping area;

[0034] The remodeling regions are sorted in descending order of microwave energy. The sequence number corresponding to each remodeling region is determined based on the sorting result. The remodeling regions are then normalized based on the sequence number to obtain the region energy index.

[0035] In a preferred embodiment, in step S4, the upper and lower limits of the effective irradiation on-time are retrieved from the microwave configuration database, and the target effective irradiation on-time of the reshaping region is calculated by combining the regional energy index.

[0036] The cooling interval is the heat dissipation time between two adjacent microwave irradiations, and the effective irradiation turn-on time of the target is used as the pulse turn-on time of microwave irradiation. Pulsed microwave irradiation treatment is performed on each reshaping region.

[0037] The technical effects and advantages of this invention are as follows:

[0038] This invention reshapes the foundation area under test and divides the reshaped area into shallow and deep layers based on the burial depth. During microwave irradiation, the soil temperature at each depth in the reshaped area is collected in real time, the temperature rise rate is calculated, and the microwave distribution trend is quantified based on the average temperature rise rate and the extreme difference of the temperature rise rate in the shallow layer. This allows for the determination of whether there is a risk of thermal failure due to excessive energy accumulation or spatial imbalance in the shallow area. When a local overheating risk is detected, a feedback control mechanism is triggered to adaptively adjust the microwave irradiation power, irradiation rhythm, and regional irradiation sequence to weaken the instantaneous energy absorption intensity in the shallow layer and extend the time window for energy transfer to the deeper layers. Through early warning and feedback closed-loop control, the overheating failure phenomenon in microwave reinforcement construction is effectively suppressed, improving the uniformity and reliability of foundation reinforcement. Attached Figure Description

[0039] Figure 1 This is a flowchart illustrating the implementation of an early warning and feedback method for foundation treatment construction according to the present invention.

[0040] Figure 2 This is a process linkage diagram of an early warning and feedback method for foundation treatment construction according to the present invention. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] This invention reshapes the foundation area under test and divides the reshaped area into shallow and deep layers based on the burial depth. During microwave irradiation, the soil temperature at the burial depth of each reshaped area is collected in real time, the temperature rise rate is calculated, and the microwave distribution trend is quantified based on the average temperature rise rate and the extreme difference of the temperature rise rate in the shallow layer. This allows for the determination of whether there is a risk of thermal failure due to excessive energy accumulation or spatial imbalance in the shallow area. When a local overheating risk is detected, a feedback control mechanism is triggered to adaptively adjust the microwave irradiation power, irradiation rhythm, and regional irradiation sequence to weaken the instantaneous energy absorption intensity in the shallow layer and extend the time window for energy transfer to the deeper layers. Through early warning and feedback closed-loop control, the overheating failure phenomenon in microwave reinforcement construction is effectively suppressed.

[0043] Example 1, such as Figures 1 to 2 As shown, a method for early warning and feedback during foundation treatment construction includes the following steps:

[0044] Step S1: At the start of microwave reinforcement construction, the area to be tested foundation is reshaped, the burial depth of each reshaped area is collected, and the location characteristics of each reshaped area are classified into shallow and deep levels according to the burial depth.

[0045] Step S2: Apply microwave irradiation to the foundation area to be tested, detect the temperature of the buried soil in each remolded area, assess the microwave distribution trend at the shallow level in combination with the location characteristics, and analyze the thermal failure risk status of the foundation area to be tested based on the microwave distribution trend.

[0046] Step S3: Determine whether to enter the feedback control mechanism based on the thermal failure risk status. When the feedback control mechanism is entered, access the construction database to retrieve the current irradiation power, adjust the current irradiation power using the microwave distribution trend, and then collect the deep-level thermal diffusion time.

[0047] Step S4: Set different cooling intervals based on thermal diffusion time, detect the microwave energy of each remodeling region and sort the remodeling regions. Combine the sorting results and cooling intervals to perform pulsed microwave irradiation treatment on each remodeling region.

[0048] The specific implementation is as follows:

[0049] In step S1, at the start of microwave reinforcement construction, the area to be tested foundation is subjected to regional reshaping treatment at the construction unit level.

[0050] Regional reshaping treatment refers to dividing the foundation area to be tested into several independent and controllable reshaping zones according to the arrangement of microwave irradiation devices. Each reshaping zone corresponds to a specific microwave irradiation device, which is used to carry out subsequent irradiation control and status monitoring. Specifically, based on the construction plan and the effective radius of the microwave irradiation device, the foundation area to be tested is divided into a grid, dividing the foundation area to be tested into several reshaping zones of equal volume along the horizontal and vertical directions. The boundary of each reshaping zone is determined by the equidistant dividing lines of adjacent microwave irradiation devices to ensure that each reshaping zone has relatively independent energy input conditions within the microwave energy coverage area.

[0051] After completing the regional reshaping, the corresponding burial depth is obtained for each reshaping area. The burial depth is the vertical distance from the microwave irradiation center point to the ground reference surface within the reshaping area. In the specific data acquisition process, the location of the ground reference surface is first determined; this surface reference surface is the original ground surface of the foundation as determined by surveying before the microwave reinforcement construction begins. Then, based on the installation structure location of the microwave irradiation device, the spatial coordinates of the microwave irradiation center point are determined. Based on this, the burial depth of the corresponding reshaping area is obtained by measuring the vertical distance between the center point and the ground reference surface.

[0052] It should be noted that when the center point of microwave irradiation has a certain spatial distribution range during construction, the burial depth height values ​​of multiple locations within the reshaping area are taken, and the burial depth height values ​​are averaged. The resulting average value is used as the burial depth height of the reshaping area to reduce the impact of local construction errors on subsequent judgment results.

[0053] After obtaining the burial depth parameters of each remodeling area, the burial depth is compared and analyzed with the preset stratification threshold. The stratification threshold is used to characterize the shallow and deep strata of the foundation area to be tested during microwave reinforcement construction, that is, the boundary between the shallow dominant energy absorption zone and the deep effective reinforcement zone during the microwave energy transmission from the surface to the interior.

[0054] When the burial depth of the reconstructed area is less than the hierarchical division threshold, the location characteristics of the reconstructed area are determined to belong to the shallow level, and the reconstructed area is marked as a shallow level area.

[0055] When the burial depth of the reconstructed area is greater than or equal to the hierarchical classification threshold, the location characteristics of the reconstructed area are determined to belong to the deep level, and the reconstructed area is marked as a deep level area.

[0056] It should be noted that the stratification threshold is set using a quantitative method based on the effective depth of microwave energy. Before construction, the effective thermal response depth of microwaves in the target foundation soil is obtained through field tests based on the operating frequency, rated power, and soil dielectric of the microwave irradiation device used. The effective thermal response depth is defined as the depth at which the soil temperature rise rate first falls below the preset lower limit of temperature rise under continuous irradiation conditions. Subsequently, the effective thermal response depths obtained from multiple sets of tests are statistically processed, and the median value is taken as the stratification threshold.

[0057] Through the above-mentioned process of collecting, calculating and comparing burial depths, objective stratification of each reshaped region in vertical position is achieved, providing a clear and quantifiable basis for subsequent microwave distribution trend assessment and feedback control based on different stratified regions.

[0058] In step S2, after the hierarchical division of the remodeling area's location characteristics is completed, microwave irradiation treatment is applied to the foundation area to be tested. Specifically, according to the microwave reinforcement process parameters preset in the construction database, irradiation commands are issued to the microwave irradiation devices corresponding to each remodeling area. The microwave reinforcement process parameters include the default output power, operating frequency, and continuous irradiation duration. After receiving the irradiation command, each microwave irradiation device enters a stable output state, applying electromagnetic energy to the soil of its corresponding remodeling area in a directional irradiation manner.

[0059] It should be noted that the construction database refers to a data set established before and during microwave foundation reinforcement construction for centralized storage and management of construction control parameters and historical construction information. Specifically, it includes microwave reinforcement process parameters corresponding to the foundation area to be tested, irradiation device operating parameters, regional reshaping division results, and process records of executed construction steps. The construction database uses the reshaping area identifier and irradiation device identifier as indexes to store each process parameter in a structured manner, and provides a consistent and traceable parameter source to the corresponding microwave irradiation device when called.

[0060] During microwave irradiation, the soil temperature at the corresponding burial depth in each remodeling area is continuously monitored. Specifically, the reflected power of the irradiation channel corresponding to each remodeling area is collected in real time through the power monitoring module of the microwave irradiation device. The time series of reflected power is obtained according to the preset sampling period. Since the dielectric constant and dielectric loss factor of collapsible loess change with the increase of soil temperature, the absorption ratio of microwaves in the soil will change accordingly, thus causing synchronous changes in reflected power. Therefore, reflected power is used as a characterization of soil temperature at burial depth.

[0061] Based on this, a mapping relationship between reflected power and soil temperature at burial depth was established using calibration tests before construction. The collected reflected power time series was converted into the corresponding soil temperature time series using the mapping relationship, thereby obtaining the soil temperature of each remolded area over time.

[0062] It should be noted that the power monitoring module refers to a functional module integrated inside the microwave irradiation device, used to monitor the energy transmission status in real time during microwave irradiation.

[0063] Based on the soil temperature at adjacent sampling times, the temperature rise rate of the soil at each remodeling zone is calculated. Specifically, the temperature rise rate is calculated by the ratio of the soil temperature difference between two adjacent samplings to the sampling time interval, which is used to characterize the intensity of microwave energy being absorbed by the soil and converted into heat in the corresponding area.

[0064] After obtaining the temperature rise rate of each remodeling region, and considering the location characteristics of these regions, microwave distribution trend assessment is performed only for the remodeling regions marked as shallow-level regions. Specifically, the temperature rise rates corresponding to all shallow-level regions at the same sampling time are aggregated to construct a shallow-level temperature rise rate distribution set. Based on this set, the average shallow-level temperature rise rate is calculated to obtain the shallow average temperature rise rate, which is used to characterize the overall microwave energy absorption level of the shallow region.

[0065] The shallow average temperature rise rate is used to reflect the overall energy absorption intensity of the shallow area under microwave irradiation, that is, the overall efficiency of microwave energy being absorbed by the soil and converted into heat in the shallow area. The larger the value, the stronger the absorption of microwave energy by the shallow soil, the higher the proportion of energy input undertaken by the shallow area, and the smaller the remaining capacity of microwave energy to be transferred vertically to the deeper layers, thus making it easier to form energy retention and heat accumulation in the shallow layer.

[0066] Simultaneously, the difference between the maximum and minimum values ​​of the shallow-level temperature rise rate is calculated as the extreme difference of the temperature rise rate, which is used to quantify the spatial non-uniformity of microwave energy in the shallow-level region.

[0067] The extreme difference in temperature rise rate is used to reflect the degree of difference in microwave energy absorption behavior between different remodeling regions in the shallow layer. Its value represents the response difference between the location with the fastest temperature rise and the location with the slowest temperature rise in the shallow layer. The larger the value, the more uneven the microwave field distribution in the shallow layer. Local areas are more likely to be affected by field strength superposition or moisture content differences, resulting in abnormal energy absorption phenomena. This can lead to the formation of overheating concentration areas in local locations, increasing the risk of structural sintering or reinforcement imbalance.

[0068] The shallow average temperature rise rate and the extreme difference in temperature rise rate together constitute the microwave distribution trend at the shallow level. Based on this trend, the thermal failure risk status of the foundation area under test is analyzed. Specifically, the shallow average temperature rise rate is compared with a preset average temperature rise safety threshold. When the shallow average temperature rise rate exceeds this threshold, it is determined that the overall microwave energy absorption in the shallow level is too strong, posing a risk of excessive energy accumulation at the shallow level. Simultaneously, the extreme difference in temperature rise rate is compared with a preset extreme difference safety threshold. When this extreme difference exceeds this threshold, it is determined that the microwave energy distribution within the shallow level is uneven, and localized areas may experience energy superposition, leading to overheating.

[0069] When any of the above judgment conditions are met, the thermal failure risk state of the foundation area to be tested is judged as a local overheating state; when none of the above judgment conditions are met, the thermal failure risk state is judged as a controllable thermal response state.

[0070] It should be noted that, under the same soil type and moisture content conditions, the temperature rise rate curves of shallow soil under different irradiation powers were obtained through pre-tests to identify the maximum stable temperature rise rate corresponding to the absence of surface sintering, sudden increase in strength, or lag in deep temperature rise. Subsequently, the results of multiple tests were statistically processed, and the lower limit of the maximum stable temperature rise rate was taken as the average temperature rise safety threshold. Before construction, a typical area with uniform microwave field distribution and small moisture content differences was selected for benchmark irradiation tests to calculate the extreme difference of temperature rise rate in each remodeling zone of the shallow layer, and this was used as a reference interval under normal uniform energy absorption conditions. Subsequently, the reference interval was corrected based on the field strength fluctuation range of the microwave equipment, and the upper limit of the corrected reference interval was selected as the extreme difference safety threshold.

[0071] In step S3, when the thermal failure risk state is local overheating, it is determined that the feedback control mechanism will be entered.

[0072] When the feedback control mechanism is entered, the current irradiation power is retrieved from the construction database. The current irradiation power is the set power value output by the microwave generator to the irradiation end.

[0073] The temperature rise rate is extracted using the microwave distribution trend. After standardizing the temperature rise rate, a temperature rise coefficient is obtained. Based on the temperature rise coefficient, the current irradiation power is adjusted to obtain the feedback-controlled irradiation power. The calculation formula is as follows: ,in, The coefficient of temperature rise. As a preset adjustment factor, This is the current irradiation power. To provide feedback for regulating irradiation power;

[0074] After the feedback-controlled irradiation power takes effect, the time process of microwave energy transfer to the deep layers is calculated by taking each deep-level remodeling region as an independent calculation object.

[0075] At the moment when the feedback regulation of irradiation power takes effect, the temperature of the buried soil in the deep remodeling area is obtained and used as the deep initiation temperature. The deep transmission cycle is preset and divided into multiple sampling times. The temperature of the buried soil in the deep remodeling area is collected at each sampling time to form a deep temperature sequence that changes over time.

[0076] The preset deep temperature rise threshold represents the minimum temperature rise required for microwave energy to be effectively transferred to the deep region. Its value can be set according to the thermal response characteristics of collapsible loess.

[0077] In the deep temperature sequence, when the increase in deep soil temperature relative to the initial soil temperature first reaches the preset deep temperature rise threshold, the corresponding sampling time is determined as the time when deep heat arrives.

[0078] Based on the time difference between the arrival time of deep heat and the effective time of feedback-controlled irradiation power, the deep heat diffusion time is obtained, which represents the time required for microwave energy to be effectively transferred from the shallow layer to the deep layer reshaping region under feedback-controlled irradiation power conditions.

[0079] It should be noted that the preset adjustment factor can be set according to the soil type, spatial distribution characteristics of moisture content, and target reinforcement depth of the foundation area to be tested; the preset deep transfer cycle can be set according to the burial depth range of the foundation area to be tested and the microwave irradiation power level; the preset deep temperature rise threshold can be set according to the minimum energy input level required for deep reinforcement and the measurement accuracy of the temperature monitoring system; the standardization processing methods include, but are not limited to, standard linear transformation based on interval scaling, Z-Score standardization method based on statistics, or normalization method based on nonlinear mapping function. The application methods of standardization processing will not be elaborated here.

[0080] By controlling the feedback of microwave distribution trends, the thermal failure risk state of local overheating is mapped to the proportional adjustment of irradiation power. Furthermore, the actual time process of microwave energy transfer to the deeper layers after power adjustment is quantified, which effectively weakens the instantaneous energy absorption intensity in the shallow layers and ensures the continuous transfer of microwave energy to the deeper layers.

[0081] In step S4, a corresponding cooling interval is set based on the deep heat diffusion time. The cooling interval is used to limit the heat dissipation time between two adjacent microwave irradiations.

[0082] The longer the deep heat diffusion time, the longer the cooling interval, in order to ensure the continuity of microwave energy transmission in the vertical direction.

[0083] Access the microwave configuration database to retrieve the basic cooling interval, which is used to limit the basic heat dissipation time between two adjacent microwave irradiations.

[0084] The cooling interval of the remodeling region is obtained by multiplying the deep heat diffusion time by the preset cooling ratio and superimposing the base cooling interval.

[0085] The larger the preset cooling ratio, the more sensitive it is to the deep heat diffusion time, thus inserting a longer heat dissipation window when the deep heat transfer is slow, in order to suppress the accumulation of shallow energy.

[0086] After completing the cooling interval configuration, microwave energy detection processing is performed on each reshaping area, specifically:

[0087] The product of the feedback-controlled irradiation power, the effective irradiation duration, and the preset energy absorption coefficient is taken as the microwave energy.

[0088] Microwave energy reflects the level of energy input obtained by the remodeling zone and absorbed by the soil.

[0089] Among them, the effective irradiation on-time is the cumulative time when the microwave generator is in the output state and the irradiation end irradiates the reshaping area with microwaves, which is obtained by statistics from the on-time log of the microwave generator; the preset energy absorption coefficient reflects the comprehensive transfer efficiency of microwave energy from the irradiation end to the corresponding reshaping area, and can be set in different grades according to the irradiation coverage calibration results before construction or according to the spatial location of the reshaping area.

[0090] The remodeling regions are sorted in descending order of microwave energy. The sequence number of each remodeling region is determined based on the sorting result. The remodeling regions are then normalized based on the sequence number to obtain the region energy index.

[0091] The total number of reshaped regions is taken as the total number of reshaped regions. The difference between the total number of reshaped regions and the sequence number corresponding to the reshaped regions is taken as the numerator, and the total number of reshaped regions is taken as the denominator. The ratio is taken as the region energy index.

[0092] Among them, the remodeling regions ranked higher indicate that they have acquired and absorbed more microwave energy, and have a higher risk of shallow energy accumulation and local overheating, while the remodeling regions ranked lower indicate that their energy absorption level is relatively low or their deep response is insufficient.

[0093] The upper and lower limits of the effective irradiance duration are retrieved from the microwave configuration database, and the target effective irradiance duration for the reshaping region is calculated by combining it with the regional energy index. ,in, This is the upper limit of the effective irradiation duration. This is the lower limit of the effective irradiation duration. This refers to the regional energy index. To reshape the effective irradiation duration of the target area;

[0094] The larger the regional energy index, the shorter the effective irradiation duration of the target; the smaller the regional energy index, the longer the effective irradiation duration of the target.

[0095] The cooling interval is defined as the heat dissipation time between two adjacent microwave irradiations, and the effective irradiation turn-on time of the target is defined as the pulse turn-on time of microwave irradiation. Pulsed microwave irradiation treatment is performed on each reshaping region, thereby achieving the overall synergistic protection of the suppression of shallow energy accumulation and the continuity of deep reinforcement.

[0096] It should be noted that the microwave configuration database is a data set used to store the operating parameters of the microwave generator and the irradiation strategy parameters; the preset cooling ratio can be set according to the target reinforcement depth of the foundation area to be tested and the moisture content range of the collapsible loess.

[0097] Finally, it should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0098] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0099] In this document, the singular forms “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that terms such as “comprising / including” or “having” specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0100] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0101] The above description of the disclosed embodiments will enable those skilled in the art to make or use various modifications to these embodiments. It will be readily apparent to those skilled in the art that the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for early warning and feedback during foundation treatment construction, characterized in that: Includes the following steps: Step S1: At the start of microwave reinforcement construction, the area to be tested foundation is reshaped, the burial depth of each reshaped area is collected, and the location characteristics of each reshaped area are classified into shallow and deep levels according to the burial depth. Step S2: Apply microwave irradiation to the foundation area to be tested, detect the temperature of the buried soil in each remolded area, assess the microwave distribution trend at the shallow level in combination with the location characteristics, and analyze the thermal failure risk status of the foundation area to be tested based on the microwave distribution trend. Step S3: Determine whether to enter the feedback control mechanism based on the thermal failure risk status. When the feedback control mechanism is entered, access the construction database to retrieve the current irradiation power, adjust the current irradiation power using the microwave distribution trend, and then collect the deep-level thermal diffusion time. Step S4: Based on the thermal diffusion time, set different cooling intervals, detect the microwave energy of each remodeling region and sort each remodeling region. Based on the combined sorting results and cooling intervals, perform pulsed microwave irradiation treatment on each remodeling region. In step S4, the microwave configuration database is accessed to retrieve the basic cooling interval, the deep heat diffusion time is multiplied by the preset cooling ratio, and the basic cooling interval is superimposed to obtain the cooling interval of the reshaping region. The product of the feedback-controlled irradiation power, the effective irradiation duration, and the preset energy absorption coefficient is taken as the microwave energy. Among them, the effective irradiation on-time is the cumulative time during which the microwave generator is in the output state and the irradiation end applies microwave irradiation to the reshaping area; The remodeling regions are sorted in descending order of microwave energy. The sequence number of each remodeling region is determined based on the sorting result. The remodeling regions are then normalized based on the sequence number to obtain the region energy index. In step S4, the upper and lower limits of the effective irradiation duration are retrieved from the microwave configuration database, and the target effective irradiation duration of the reshaping region is calculated by combining the regional energy index. The cooling interval is the heat dissipation time between two adjacent microwave irradiations, and the effective irradiation turn-on time of the target is used as the pulse turn-on time of microwave irradiation. Pulsed microwave irradiation treatment is performed on each reshaping region.

2. The early warning and feedback method for foundation treatment construction process according to claim 1, characterized in that: In step S1, at the start of microwave reinforcement construction, the area to be tested foundation is subjected to regional reshaping treatment at the construction unit level. Regional reshaping treatment refers to dividing the ground area to be tested into several independent and controllable reshaping areas according to the arrangement of microwave irradiation devices, with each reshaping area corresponding to a specific microwave irradiation device. For each reshaping area, the corresponding burial depth is obtained. The burial depth is the vertical distance from the center point of microwave irradiation within the reshaping area to the ground reference surface.

3. The early warning and feedback method for foundation treatment construction process according to claim 2, characterized in that: In step S1, the burial depth is compared and analyzed with the preset layer division threshold. The layer division threshold is used to characterize the shallow and deep layers of the foundation area to be tested during microwave reinforcement construction, that is, the boundary between the shallow dominant energy absorption zone and the deep effective reinforcement zone during the microwave energy transmission from the surface to the inside. When the burial depth of the reconstructed area is less than the hierarchical division threshold, the location characteristics of the reconstructed area are determined to belong to the shallow level, and the reconstructed area is marked as a shallow level area. When the burial depth of the reconstructed area is greater than or equal to the hierarchical classification threshold, the location characteristics of the reconstructed area are determined to belong to the deep level, and the reconstructed area is marked as a deep level area.

4. The early warning and feedback method for foundation treatment construction process according to claim 1, characterized in that: In step S2, microwave irradiation is applied to the foundation area to be tested. During the microwave irradiation process, the soil temperature at the corresponding burial depth of each remolded area is continuously monitored. The temperature rise rate is calculated by the ratio of the soil temperature difference between two adjacent samples to the sampling time interval. The temperature rise rates of all shallow-level areas at the same sampling time are summarized, and the average shallow-level temperature rise rate is calculated to obtain the shallow average temperature rise rate. The difference between the maximum and minimum temperature rise rates in the shallow layer is calculated as the extreme difference of temperature rise rates. The average temperature rise rate in the shallow layer and the extreme difference of temperature rise rates together constitute the microwave distribution trend in the shallow layer.

5. The early warning and feedback method for foundation treatment construction process according to claim 4, characterized in that: In step S2, the thermal failure risk status of the foundation area under test is analyzed based on the microwave distribution trend: the average temperature rise rate of the shallow layer is compared with the preset average temperature rise safety threshold. When the average temperature rise rate of the shallow layer exceeds the average temperature rise safety threshold, it is determined that the overall microwave energy absorption of the shallow layer is too strong, and there is a risk of excessive energy accumulation in the shallow layer. At the same time, the extreme difference of temperature rise rate is compared with the preset extreme difference safety threshold. When the extreme difference of temperature rise rate exceeds the extreme difference safety threshold, it is determined that the microwave energy distribution in the shallow layer area is uneven, and energy superposition may occur in local areas, causing overheating. When any of the judgment conditions are met, the thermal failure risk state of the foundation area to be tested is judged as a local overheating state. Conversely, the thermal failure risk state is determined to be a controllable thermal response state.

6. The early warning and feedback method for foundation treatment construction process according to claim 1, characterized in that: In step S3, when the thermal failure risk state is local overheating, it is determined that the feedback control mechanism will be entered. When the feedback control mechanism is activated, the current irradiation power is retrieved from the construction database. The temperature rise rate is extracted by utilizing the microwave distribution trend. After standardizing the temperature rise rate, the temperature rise coefficient is obtained. The current irradiation power is adjusted based on the temperature rise coefficient to obtain the feedback-controlled irradiation power. At the moment when the feedback regulation of irradiation power takes effect, the temperature of the buried soil in the deep remodeling area is obtained and used as the deep initiation temperature. The deep transmission cycle is preset and divided into multiple sampling times.

7. The early warning and feedback method for foundation treatment construction process according to claim 6, characterized in that: In step S3, the temperature of the buried soil in the deep remodeling area is collected at each sampling time to form a deep temperature sequence that varies with time. In the deep temperature sequence, when the increase in deep soil temperature relative to the initial soil temperature first reaches the preset deep temperature rise threshold, the corresponding sampling time is determined as the time when deep heat arrives. The deep thermal diffusion time is obtained based on the time difference between the arrival time of deep heat and the effective time of feedback-controlled irradiation power.

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