CN-121629911-B - Early warning and feedback method for foundation treatment construction process

CN121629911BCN 121629911 BCN121629911 BCN 121629911BCN-121629911-B

Abstract

The invention discloses an early warning and feedback method of foundation treatment construction process, which relates to the technical field of construction early warning and is used for solving the problem of serious deep energy attenuation caused by shallow overheat sintering, the shallow level and deep level classification is carried out on a heavy plastic region according to the height of a buried depth by carrying out regional remolding on the region to be detected, the temperature of the buried depth soil body of each remolded region is collected in real time in the microwave irradiation process, the temperature rise rate is calculated, and the microwave distribution trend is differentiated based on the average temperature rise rate and the extreme value of the temperature rise rate of the shallow level, and when the local overheat risk is detected, triggering a feedback regulation mechanism, and carrying out self-adaptive adjustment on microwave irradiation power, irradiation rhythm and region irradiation sequence so as to weaken the instantaneous energy absorption intensity of a shallow layer and prolong the time window for energy transfer to a deep layer, and improving the uniformity and reliability of foundation reinforcement through early warning and feedback closed-loop control.

Inventors

SHAO GUIBIN
WAN JINGJING
GAO CHENGHAO
ZHAO LINGZHI
LIU XIANG
LIU QIANG
YU ZELI
WANG BIN
SUN HAIFENG
JIN HONGQIANG
ZHANG JIHUI
LI BO
SUN XIAO
GUO HAOLEI
LI SHUJUN

Assignees

中国市政工程西北设计研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (7)

1. A pre-warning and feedback method for a foundation treatment construction process is characterized by comprising the following steps: S1, when microwave reinforcement construction is started, carrying out regional remodeling on a foundation region to be detected, collecting the burial depth of each remolded region, and classifying the position features of each remolded region into a shallow level and a deep level according to the burial depth; s2, applying microwave irradiation to the foundation area to be detected, detecting the temperature of the buried soil body of each remolded area, evaluating the microwave distribution trend of the shallow level by combining the position characteristics, and analyzing the thermal failure risk state of the foundation area to be detected based on the microwave distribution trend; s3, judging whether to enter a feedback regulation mechanism according to the thermal failure risk state, accessing a construction database to call current irradiation power when entering the feedback regulation mechanism, and acquiring deep-level thermal diffusion time after the current irradiation power is regulated by utilizing a microwave distribution trend; step S4, setting different cooling intervals based on the heat diffusion time, detecting microwave energy of each remolded area, sequencing each remolded area, and executing pulse microwave irradiation treatment on each remolded area by combining sequencing results and cooling intervals; In step S4, accessing a microwave configuration database to call a basic cooling interval, multiplying the deep heat diffusion time by a preset cooling rate, and superposing the basic cooling interval to obtain a cooling interval of a remolded area; Taking the product result of feedback regulation irradiation power, effective irradiation opening time and preset energy absorption coefficient as microwave energy; The effective irradiation opening time length is the accumulated time length of the microwave generator in an output state and the irradiation end performs microwave irradiation on the plastic-overlapped area; Sequencing the remolded areas according to the descending order of microwave energy, determining the serial numbers corresponding to the remolded areas according to the sequencing result, and carrying out normalization processing on the remolded areas based on the serial numbers to obtain an area energy index; in step S4, the upper limit value and the lower limit value of the effective irradiation opening duration are called through a microwave configuration database, and the target effective irradiation opening duration of the remodelled area is obtained through calculation by combining the area energy index; Taking the cooling interval as the heat dissipation time length between two adjacent microwave irradiation, taking the target effective irradiation opening time length as the pulse opening time of the microwave irradiation, and executing pulse microwave irradiation treatment on each remodelling area.
2. The method for early warning and feedback in a foundation treatment construction process according to claim 1, wherein the method comprises the following steps: In the step S1, when the microwave reinforcement construction is started, carrying out construction unit-level regional remodeling treatment on a foundation region to be detected; The regional remodeling treatment is to divide a foundation region to be measured into a plurality of remolded regions which are independent and can be controlled respectively according to the arrangement mode of the microwave irradiation devices, and each remolded region corresponds to a determined microwave irradiation device; and obtaining corresponding embedded depth height for each remolded area, wherein the embedded depth height is the vertical distance from the microwave irradiation action center point in the remolded area to the ground surface datum plane.
3. The method for early warning and feedback in a foundation treatment construction process according to claim 2, wherein the method comprises the following steps: In step S1, comparing and analyzing the buried depth with a preset level dividing threshold value, wherein the level dividing threshold value is used for representing shallow levels and deep levels of a foundation area to be tested in microwave reinforcement construction, namely boundary positions between a shallow layer dominant energy absorption area and a deep layer effective reinforcement area in the process of transmitting microwave energy from the surface to the inside; When the embedded depth of the remodelling area is smaller than the hierarchical division threshold value, judging that the position features of the remodelling area belong to a shallow level, and marking the remodelling area as a shallow level area; and when the embedded depth of the remodelling area is greater than or equal to the hierarchical division threshold, judging that the position features of the remodelling area belong to a deep hierarchy, and marking the remodelling area as a deep-level area.
4. The method for early warning and feedback in a foundation treatment construction process according to claim 1, wherein the method comprises the following steps: In the step S2, microwave irradiation treatment is applied to the foundation area to be detected, and in the microwave irradiation process, the soil temperature at the position corresponding to the burial depth of each remolded area is continuously detected; calculating the temperature rise rate according to the ratio of the soil temperature difference value of two adjacent samples to the sampling time interval, summarizing the temperature rise rates corresponding to all shallow level areas at the same sampling time, and calculating the average value of the shallow level temperature rise rates to obtain the shallow average temperature rise rate; and calculating the difference between the maximum value and the minimum value of the shallow-level temperature rise rate to serve as the extreme value difference of the temperature rise rate, and jointly forming the microwave distribution trend of the shallow level by the shallow-level average temperature rise rate and the extreme value difference of the temperature rise rate.
5. The method for early warning and feedback in a foundation treatment construction process according to claim 4, wherein the method comprises the following steps: in step S2, analyzing the thermal failure risk state of the foundation area to be detected based on the microwave distribution trend, namely comparing the shallow average temperature rise rate with a preset average temperature rise safety threshold, and judging that the whole microwave energy absorption of the shallow level area is too strong when the shallow average temperature rise rate exceeds the average temperature rise safety threshold, so that the risk of excessive accumulation of energy in the shallow level exists; meanwhile, comparing the temperature rise rate extreme value difference with a preset extreme value difference safety threshold, and judging that microwave energy in the shallow level area is unevenly distributed when the temperature rise rate extreme value difference exceeds the extreme value difference safety threshold, wherein the local area is likely to have energy superposition and cause overheat; And when any judging condition is met, judging the thermal failure risk state of the foundation area to be detected as a local overheat state, and otherwise, judging the thermal failure risk state as a controllable thermal response state.
6. The method for early warning and feedback in a foundation treatment construction process according to claim 1, wherein the method comprises the following steps: In step S3, when the thermal failure risk state is local overheat, determining to enter a feedback regulation mechanism; Accessing a construction database to call the current irradiation power when a feedback regulation mechanism is entered; extracting a temperature rise rate by utilizing a microwave distribution trend, obtaining a temperature rise coefficient after normalizing the temperature rise rate, and regulating the current irradiation power based on the temperature rise coefficient to obtain feedback regulation irradiation power; And acquiring the temperature of the buried soil in the deep-level remodelling area at the effective moment of the feedback regulation irradiation power, taking the temperature as the deep initial temperature, presetting a deep transfer period and dividing the deep transfer period into a plurality of sampling moments.
7. The method for early warning and feedback in a foundation treatment construction process according to claim 6, wherein the method comprises the following steps: in the step S3, collecting the temperature of the buried soil in the deep-level remodelling area at each sampling moment to form a deep temperature sequence which changes with time; In the deep temperature sequence, when the rising amplitude of the temperature of the deep soil body relative to the temperature of the initial soil body reaches a preset deep temperature rise threshold value for the first time, determining the corresponding sampling time as the arrival time of the deep heat; And obtaining the deep heat diffusion time based on the time difference between the arrival time of the deep heat and the effective time of the feedback control irradiation power.

Description

Early warning and feedback method for foundation treatment construction process Technical Field The invention relates to the technical field of construction early warning, in particular to an early warning and feedback method for a foundation treatment construction process. Background Collapsible loess has loose pore structure and sharply reduced strength when meeting water, and is widely used in traffic, municipal administration and energy infrastructure construction, and for the reinforcement treatment of the foundation, the microwave reinforcement technology applies a high-frequency electromagnetic field to the soil body to enable water molecules in the soil body to generate polarization and dielectric loss, so that volume heating, dehydration consolidation and structural densification are realized, and the method is considered to be a novel foundation treatment means with high construction speed, high energy utilization rate and small disturbance to surrounding environment. The prior art has the following defects: At present, the prior art mostly adopts fixed irradiation power and fixed irradiation rhythm to carry out microwave reinforcement construction on a foundation, carries out coarse grain monitoring and empirical regulation and control only based on surface layer or single-point burial depth temperature, lacks regional thermal response monitoring and microwave distribution trend quantitative evaluation mechanisms facing burial depth layering, and is difficult to timely inhibit overheat expansion caused by excessive accumulation of shallow local energy, so that shallow overheat sintering is caused, deep energy attenuation is serious, reinforcement is insufficient, and a recessive collapsible region is formed. Therefore, an early warning and feedback method for the foundation treatment construction process is provided. The above information disclosed in the background section is only for enhancement of understanding of the background of the disclosure and therefore it may include information that does not form the prior art that is already known to a person of ordinary skill in the art. Disclosure of Invention In order to overcome the defects in the prior art, the embodiment of the invention provides an early warning and feedback method for a foundation treatment construction process, which solves the problems in the background art by applying a region remodelling and thermal response monitoring mechanism based on burial depth layering, a microwave distribution trend quantitative evaluation model and a feedback regulation closed-loop control strategy driven by thermal failure risk. In order to achieve the above purpose, the invention provides a method for early warning and feedback in the foundation treatment construction process, which comprises the following steps: S1, when microwave reinforcement construction is started, carrying out regional remodeling on a foundation region to be detected, collecting the burial depth of each remolded region, and classifying the position features of each remolded region into a shallow level and a deep level according to the burial depth; s2, applying microwave irradiation to the foundation area to be detected, detecting the temperature of the buried soil body of each remolded area, evaluating the microwave distribution trend of the shallow level by combining the position characteristics, and analyzing the thermal failure risk state of the foundation area to be detected based on the microwave distribution trend; s3, judging whether to enter a feedback regulation mechanism according to the thermal failure risk state, accessing a construction database to call current irradiation power when entering the feedback regulation mechanism, and acquiring deep-level thermal diffusion time after the current irradiation power is regulated by utilizing a microwave distribution trend; And S4, setting different cooling intervals based on the heat diffusion time, detecting the microwave energy of each remolded area, sequencing each remolded area, and executing pulse microwave irradiation treatment on each remolded area by combining the sequencing result and the cooling intervals. In a preferred embodiment, in step S1, at the beginning of the microwave reinforcement construction, a construction unit-level region remodeling process is performed on the region of the foundation to be measured; The regional remodeling treatment is to divide a foundation region to be measured into a plurality of remolded regions which are independent and can be controlled respectively according to the arrangement mode of the microwave irradiation devices, and each remolded region corresponds to a determined microwave irradiation device; and obtaining corresponding embedded depth height for each remolded area, wherein the embedded depth height is the vertical distance from the microwave irradiation action center point in the remolded area to the ground surface datum plane. In a preferred embodiment, in