A high fill compaction detection and settlement compensation method based on insar technology

Abstract

The invention discloses a high-filling embankment compactness detecting and settlement compensation method based on the InSAR technology. The method includes the following steps that 1, an SAR image of a high-filling embankment in construction is obtained; 2, DEM data of the high-filling embankment in construction is obtained; 3, the compactness of the high-filling embankment in construction is detected; 4, the initial volume and the initial compactness of the formed high-filling embankment are calculated; 5, an SAR image of the formed high-filling embankment in the settlement process is obtained; 6, DEM data of the formed high-filling embankment in the settlement process is obtained; 7, the volume loss and compactness of the formed high-filling embankment in the settlement process are obtained; 8, compensation of the formed high-filling embankment after settlement is conducted. The method is simple in step, the compactness of the high-filling embankment in construction and the volume loss and compactness of the formed high-filling embankment in the settlement process are accurately detected, the relationship between the volume loss of the formed high-filling embankment and the compactness of the high-filling embankment in construction is obtained, and a basis is provided for the compensation of the formed high-filling embankment after settlement.

Description

technical field [0001] The invention belongs to the technical field of high filling engineering detection, and in particular relates to a high filling compaction detection and settlement compensation method based on InSAR technology. Background technique [0002] High fill engineering is a construction project in which the required structures are significantly higher than the surrounding terrain through layered rolling and backfilling in the original slope or valley. The deformation monitoring and compaction detection of high fill engineering are the most Two necessary links to ensure the quality of the project. [0003] At present, the settlement and deformation monitoring of high fill generally adopts on-site leveling survey and GPS survey. On-site leveling survey requires manual work in the field, and the cycle is long and expensive. Although GPS survey solves the problem of long leveling cycle, it still cannot meet the requirements of large-scale monitoring. The monitor...

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Problems solved by technology

Therefore, it is difficult to objectively evaluate the impact of the diversity of fillers and the dispersion of geotechnical parameters on the overall compaction quality of high-fill projects; Or individual filling inspection standards for large-area, large-volume and high-filling engineering compaction inspections will inevitably cause a sharp increase in project costs; at the same time, due to the speed limit of manual inspections, the construction period will be extended and delayed; finally, large-area 1. After the construction of large-volume high-filling is completed, under the long-term self-weight action of the high-filling, the high-filling usually undergoes settlement deformation, the settlement process is long and the settlement is uneven, and the compaction degree of the high-filling also changes during the settlement process. It needs to be further improved, especially for some key and major high fill projects (such as airport high fill), it is very important to compensate the settlement deformation of high fill to meet the engineering design requirements

[0004] From the above content, it can be seen that using the traditional compaction degree detection and settlement deformation monitoring method, due to its inability to avoid its own defects, the compaction degree detection results and settlement deformation monitoring deviate from the actual project, resulting in the compensation of high fill. Large error makes it more difficult to establish the relationship between settlement deformation and compaction degree, which cannot meet the requirements of construction accuracy

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