CN-121809857-B - Highway loess foundation collapsibility treatment effect evaluation method

CN121809857BCN 121809857 BCN121809857 BCN 121809857BCN-121809857-B

Abstract

The invention relates to the technical field of highway foundation treatment and monitoring, and discloses a highway loess original foundation collapsibility treatment effect evaluation method. The method comprises the steps of establishing an initial model based on engineering data, and dynamically correcting by utilizing real-time monitoring data after construction to generate a collapsible dynamic response model. And constructing a comprehensive evaluation characteristic field by fusing space-time superposition results of the real-time data and the historical exploration data. And carrying out region division and difference calculation on the characteristic field, generating a response difference field and calibrating a potential collapse abnormal region. And iteratively correcting model parameters based on abnormal region characteristics, and introducing virtual load working conditions to simulate the collapsible development process under different loads. And finally, outputting an evaluation result through a visual interaction model. The method realizes the transition from static to dynamic and from current analysis to development prediction of the collapsibility evaluation, and improves the timeliness, accuracy and engineering early warning capability of the evaluation.

Inventors

WANG PING
LI HONGRU
Qiang Chunpeng
LI JIAQI

Assignees

西北有色勘测工程有限责任公司
西安理工大学

Dates

Publication Date: 20260508
Application Date: 20260309

Claims (10)

1. The method for evaluating the collapsibility treatment effect of the loess foundation of the highway is characterized by comprising the following steps of: Establishing an initial collapsibility model of the loess foundation of the highway based on engineering geological data of the untreated foundation and preset collapsibility inducement parameters; dynamically correcting the initial collapsibility model according to the processed and constructed field real-time monitoring data to generate a collapsibility dynamic response model; Performing space-time superposition on the on-site real-time monitoring data and the historical exploration data before processing construction to generate a foundation state comparison data set before and after processing; Performing feature fusion on the collapsibility dynamic response model and the foundation state comparison data sets before and after the processing to generate a foundation collapsibility comprehensive evaluation feature field; Performing region division and difference calculation on the foundation collapsibility comprehensive evaluation characteristic field to obtain a collapsibility response difference field; calibrating a potential collapse abnormal region in a loess foundation of the highway according to the collapsible response difference field and a preset threshold condition; Carrying out iterative correction on internal parameters of the collapsible dynamic response model according to the distribution and characteristics of the potential collapse abnormal region, introducing virtual load working conditions into the corrected model, and simulating the collapse development process of the highway loess foundation under different load conditions; And constructing a visual interaction model comprising a collapsible development process, a collapsible response difference field and a potential collapse abnormal region, receiving an evaluation parameter adjustment instruction through the visual interaction model to drive model update, and outputting an updated collapsible evaluation result.
2. The method for evaluating the collapsibility of a highway loess foundation according to claim 1, wherein the establishing an initial collapsibility model of a highway loess foundation comprises the steps of: Acquiring an engineering geological survey report before highway loess original foundation treatment, and extracting soil layer profile information, initial water content information and historical collapse coefficient information in the engineering geological survey report; Setting a collapse causing parameter comprising a water soaking rate, a water soaking range and an additional load, wherein the collapse causing parameter is used for simulating conditions of soaking the foundation in water and externally loading the foundation; And calculating and simulating deformation and stress response of the untreated foundation under different collapsible inducements according to the soil layer profile information, the initial water content information, the historical collapsible coefficient information and the collapsible inducement parameters through foundation soil constitutive relations, and generating an initial collapsible model of the highway loess original foundation, wherein the initial collapsible model is output as a simulation state data set.
3. The method for evaluating the collapsibility treatment effect of a highway loess foundation according to claim 2, wherein the generating a collapsibility dynamic response model comprises the steps of: a sensor network is arranged to monitor the loess foundation of the highway after the construction, and on-site real-time monitoring data comprising real-time water content, soil layer pressure and ground surface settlement are continuously collected; carrying out structural processing on the on-site real-time monitoring data according to the acquisition time and the space position to form a space-time continuous on-site monitoring data set; Inputting the field monitoring dataset into the initial collapsibility model, comparing differences of the simulated state dataset and the field monitoring dataset; and calculating a model correction coefficient based on the difference, dynamically adjusting internal calculation parameters of the initial collapsibility model according to the model correction coefficient, and generating a collapsibility dynamic response model capable of reflecting the actual state of the processed foundation, wherein the collapsibility dynamic response model outputs corrected simulation state data.
4. The method for evaluating the collapsibility of a loess foundation for highway according to claim 1, wherein the generating the pre-and post-processing foundation state comparison data set comprises the steps of: Historical exploration data acquired at the same space coordinate point before construction is called, wherein the historical exploration data comprises exploration point soil sample density, exploration point soil sample pore ratio and initial static sounding resistance; aligning and matching the on-site real-time monitoring data with the historical exploration data according to the same space coordinates; calculating the difference value of each corresponding physical quantity in the field real-time monitoring data and the historical exploration data on the same matched space point to form a difference value data set comprising the water content variation, the density variation and the bearing capacity variation; binding the difference data set with the corresponding space coordinates and time stamps to generate a foundation state comparison data set with space-time attributes before and after processing.
5. The method for evaluating the collapsibility of a highway loess foundation according to claim 1, wherein the generating a comprehensive evaluation characteristic field of foundation collapsibility comprises the steps of: Extracting key state variables in the corrected simulation state data from the collapsibility dynamic response model; Extracting difference data of each physical quantity from the foundation state comparison data set before and after the processing; Performing spatial interpolation calculation on the key state variables and the difference data, and fusing to generate continuous spatial distribution data covering the whole evaluation area; and carrying out standardization and normalization calculation on the continuous space distribution data, and generating a foundation collapsibility comprehensive evaluation characteristic field after eliminating dimension influence, wherein the foundation collapsibility comprehensive evaluation characteristic field is a digital matrix containing multi-dimensional evaluation indexes.
6. The method for evaluating the collapsibility of a road loess foundation according to claim 1, wherein said obtaining a collapsibility-response difference field comprises the steps of: dividing the area covered by the foundation collapsibility comprehensive evaluation characteristic place into a plurality of regular evaluation grid units; Calculating statistical characteristic values of a plurality of dimension evaluation indexes in the foundation collapsibility comprehensive evaluation characteristic field aiming at each evaluation grid unit; Comparing and calculating the statistical characteristic value of each evaluation grid unit with the statistical characteristic value of the adjacent evaluation grid unit to obtain the local difference degree of each evaluation grid unit relative to the neighborhood of the evaluation grid unit; and arranging the local difference degrees of all the evaluation grid units according to the spatial positions to form a collapsibility response difference field of the highway loess foundation.
7. The method for evaluating the collapsibility treatment effect of a highway loess foundation according to claim 1, wherein said calibrating the potential collapsibility anomaly region in the highway loess foundation comprises the steps of: Presetting a threshold condition for judging an abnormal state, wherein the threshold condition comprises a local difference upper limit and a change gradient threshold; comparing the local variance of each location in the collapsible response variance field to the threshold condition; marking all spatial position points of which the local difference degree exceeds the upper limit of the local difference degree or the change amplitude exceeds the change gradient threshold value; and carrying out cluster analysis on the marked space position points, aggregating the marked points which are continuous or adjacent in space into an abnormal region, thereby marking one or more potential collapse abnormal regions, and recording the range and the core parameter of each potential collapse abnormal region.
8. The method for evaluating the collapsibility treatment effect of a highway loess foundation according to claim 1, wherein the iterative correction of the internal parameters of the collapsibility dynamic response model according to the distribution and characteristics of the potential collapsibility anomaly region comprises the steps of: Extracting abnormal characteristic parameters from the core parameters of the potential collapse abnormal region; comparing the abnormal characteristic parameters with output results of the collapsibility dynamic response model in corresponding areas to generate parameter error vectors; According to the parameter error vector, calculating the adjustment quantity of the corresponding soil body constitutive parameters in the collapsibility dynamic response model by adopting a reverse feedback adjustment mechanism; correcting the internal parameters of the collapsible dynamic response model once according to the adjustment quantity to finish an iterative process; Repeating the steps of model calculation, comparison, error vector generation and internal parameter correction until the parameter error vector meets the preset convergence standard, and obtaining the final iterative corrected collapsibility dynamic response model.
9. The method for evaluating the collapsibility of a highway loess foundation according to claim 1, wherein the process of simulating the collapsibility development of a highway loess foundation under different load conditions comprises the steps of: Defining a virtual load working condition in the final iterative corrected collapsibility dynamic response model, wherein the virtual load working condition comprises different load sizes, load distribution forms and loading time histories; inputting the virtual load working condition as a boundary condition into the final iterative corrected collapsibility dynamic response model; operating the final iterative corrected collapsibility dynamic response model, and calculating the data of stress, strain and collapsibility deformation of each point of the foundation along with time change under the virtual load working condition; and recording and outputting the data of the collapse development process of the loess foundation of the highway in the whole simulation time course.
10. The method for evaluating the collapsibility treatment effect of a highway loess foundation according to claim 1, wherein the receiving an evaluation parameter adjustment instruction through the visual interaction model to drive model update and outputting an updated collapsibility evaluation result comprises the steps of: receiving an evaluation parameter adjustment instruction input by a user through an interface provided by the visual interaction model, wherein the evaluation parameter adjustment instruction comprises modification of a collapse causing parameter or a virtual load working condition; Analyzing the evaluation parameter adjustment instruction into an input parameter identifiable by the collapsibility dynamic response model; Loading the analyzed input parameters into the collapsible dynamic response model, replacing the original corresponding parameters, and triggering the model to recalculate; Acquiring updated collapsible development process data, updated collapsible response difference fields and updated potential collapse abnormal region information generated after model recalculation; and dynamically refreshing and displaying all updated highway loess foundation collapsibility evaluation results in the visual interaction model.

Description

Highway loess foundation collapsibility treatment effect evaluation method Technical Field The invention relates to the technical field of highway foundation treatment and monitoring, in particular to a highway loess original foundation collapsibility treatment effect evaluation method. Background In highway construction, the problem of collapsibility of loess foundation is a key factor affecting engineering safety. The currently commonly used collapsibility evaluation method is generally used for establishing a static model based on engineering geological exploration data before construction, and performing post-hoc comparison evaluation through spot test means such as on-site sampling detection or static sounding. The method depends on exploration parameters of fixed time and position, continuous change information of the foundation state after construction cannot be effectively incorporated, the assessment conclusion is delayed from the actual progress of engineering, and the actual effect of the treatment measures is difficult to accurately reflect. The prior art scheme has the defects of staticization and discretization. The static model can not be updated along with the actual change of the foundation property, and the evaluation result is disjointed with the engineering dynamic development process. The traditional method is independent of data comparison and experience judgment of limited detection points to divide abnormal areas, and lacks an objective and quantitative recognition mechanism based on multi-source data fusion and space difference calculation. The evaluation process is usually stopped at the current description, and predictive analysis of the wet collapse development process under different load conditions cannot be realized, so that the identification of the potential risk area is inaccurate, and the long-term stability of the treatment effect is difficult to scientifically predict. The method has the core problem of converting the wet-holding processing effect evaluation from static and discrete post judgment into dynamic, continuous and predictive procedural evaluation. The key is to construct an analysis model which can be fused with real-time monitoring data and dynamically updated, and form a risk early warning mechanism based on data difference identification and virtual load simulation. Disclosure of Invention The invention aims to provide a method for evaluating the collapsibility treatment effect of a highway loess foundation, which aims to solve the problems in the prior art. In order to achieve the above object, the present invention provides a method for evaluating a collapsible treatment effect of a loess foundation of a highway, the method comprising: Establishing an initial collapsibility model of the loess foundation of the highway based on engineering geological data of the untreated foundation and preset collapsibility inducement parameters; dynamically correcting the initial collapsibility model according to the processed and constructed field real-time monitoring data to generate a collapsibility dynamic response model; Performing space-time superposition on the on-site real-time monitoring data and the historical exploration data before processing construction to generate a foundation state comparison data set before and after processing; Performing feature fusion on the collapsibility dynamic response model and the foundation state comparison data sets before and after the processing to generate a foundation collapsibility comprehensive evaluation feature field; Performing region division and difference calculation on the foundation collapsibility comprehensive evaluation characteristic field to obtain a collapsibility response difference field; calibrating a potential collapse abnormal region in a loess foundation of the highway according to the collapsible response difference field and a preset threshold condition; Carrying out iterative correction on internal parameters of the collapsible dynamic response model according to the distribution and characteristics of the potential collapse abnormal region, introducing virtual load working conditions into the corrected model, and simulating the collapse development process of the highway loess foundation under different load conditions; And constructing a visual interaction model comprising a collapsible development process, a collapsible response difference field and a potential collapse abnormal region, receiving an evaluation parameter adjustment instruction through the visual interaction model to drive model update, and outputting an updated collapsible evaluation result. Preferably, the establishing the initial collapsibility model of the highway loess foundation comprises the following steps: Acquiring an engineering geological survey report before highway loess original foundation treatment, and extracting soil layer profile information, initial water content information and historical collapse coefficient i