CN-121994187-A - Automatic monitoring system and method for stability of wind-blown sand high-fill roadbed

CN121994187ACN 121994187 ACN121994187 ACN 121994187ACN-121994187-A

Abstract

The invention discloses an automatic monitoring system and method for stability of a high-fill roadbed of aeolian sand, belonging to the technical field of roadbed engineering monitoring, comprising a layered settlement monitoring module, a monitoring module and a monitoring module, wherein the layered settlement meter comprises layered settlement meters distributed along the depth direction of the roadbed and is used for measuring settlement amounts of different soil layers in the roadbed; the deep horizontal displacement monitoring module comprises a guide wheel type inclinometer embedded into the roadbed and used for measuring the horizontal displacement of the deep part of the roadbed, a data acquisition module connected with the layered settlement meter and the guide wheel type inclinometer and used for automatically acquiring the settlement and the horizontal displacement according to preset frequency, a communication module connected with the data acquisition module and used for remotely transmitting acquired data, and a data analysis and early warning module used for receiving and storing the data and carrying out stability analysis and early warning. According to the invention, unmanned and continuous monitoring is realized through automatic acquisition and remote transmission, and the long-term safety and durability of the roadbed are improved for the construction of the wind-blown sand high-fill roadbed.

Inventors

CHENG JIANJUN
WAN WEI
YU LIMING
WANG HUI

Assignees

石河子大学

Dates

Publication Date: 20260508
Application Date: 20260213

Claims (10)

1. An automatic monitoring system for stability of a wind-blown sand high-fill roadbed, which is characterized by comprising: The layered settlement monitoring module comprises at least one group of layered settlement meters which are distributed along the depth direction of the roadbed and are used for measuring settlement amounts of different soil layers in the roadbed; The deep horizontal displacement monitoring module comprises at least one group of guide wheel inclinometers embedded into the roadbed and is used for measuring the horizontal displacement of the deep part of the roadbed; The data acquisition module is connected with the layered settlement meter and the guide wheel type inclinometer and is used for automatically acquiring settlement and horizontal displacement according to preset frequency; the communication module is connected with the data acquisition module and is used for remotely transmitting acquired data; And the data analysis and early warning module is used for receiving and storing data and carrying out stability analysis and early warning.
2. The automated monitoring system for stability of a high-fill subgrade with aeolian sand according to claim 1, wherein said layered settlement monitoring module comprises two sets of layered settlement meters symmetrically arranged at the positions of shoulders on both sides of the same cross section of the subgrade, each set comprising at least four monitoring points distributed along the depth.
3. The automated monitoring system for stability of a high-fill subgrade with aeolian sand according to claim 1, further comprising an environmental parameter monitoring module comprising an anemometer and an air hygrothermograph for monitoring wind speed, wind direction, temperature and humidity at the periphery of the subgrade.
4. The automatic monitoring system for the stability of the wind-blown sand high-fill roadbed according to claim 1, wherein the bottom of the guide wheel type inclinometer is integrated with a high-precision micro-motion sensor for continuously monitoring the displacement of the guide wheel type inclinometer in a self micron level.
5. The automatic monitoring system for stability of the wind-blown sand high-fill subgrade according to claim 1, wherein the data analysis and early warning module generates a subgrade stability status report and early warning information by comparing real-time data with a preset threshold or historical change trend.
6. An automatic monitoring method for stability of a aeolian sand high-fill roadbed, which uses the automatic monitoring system for stability of a aeolian sand high-fill roadbed according to any one of claims 1 to 5, and is characterized by comprising the following steps: s1, after roadbed filling is completed, determining point positions at the positions of monitoring section shoulders, and downwards drilling holes to a preset motionless layer; S2, installing a layered settlement meter and a guide wheel type inclinometer, wherein each monitoring point of the layered settlement meter is distributed according to the design depth, the guide wheel type inclinometer is vertically installed along an inclinometer pipe, and the micro-motion sensor at the bottom of the inclinometer pipe is ensured to be in position; s3, connecting and debugging a data acquisition module and a communication module, and setting an automatic acquisition frequency; S4, starting the system, carrying out long-term, continuous and automatic data acquisition and remote transmission, and periodically analyzing the micro-motion sensor data to confirm the reliability of the displacement calculation reference; And S5, analyzing the layered settlement rule and the deep horizontal displacement trend of the roadbed based on the reliable monitoring data, and evaluating the stability of the roadbed.
7. The automated monitoring method for stability of a high-fill subgrade with aeolian sand according to claim 6, characterized in that in step S1, the horizontal intervals of the monitoring points on both sides of the monitoring section are 3-5 meters.
8. The automated monitoring method for stability of a high-fill subgrade with aeolian sand according to claim 6, characterized in that in step S3, the collection frequency of said layered settlement gauge and guide wheel inclinometer is set to 120 minutes/time, and the collection frequency of anemometer and air hygrothermograph is set to 10 minutes/time.
9. The automated monitoring method for stability of a high-fill subgrade with aeolian sand according to claim 6, characterized in that in step S2, when said guide wheel inclinometer is installed, it is ensured that the X positive direction guide slot is consistent with the potential sliding direction of the subgrade or the direction of the center line of the road.
10. The automated monitoring method for stability of a high-fill subgrade with aeolian sand according to claim 6, characterized in that in step S5, the differential settlement of the subgrade is evaluated by analyzing the differential settlement of soil layers of different depths, and the overall slip risk of the subgrade is evaluated by analyzing the cumulative change of deep horizontal displacement with time.

Description

Automatic monitoring system and method for stability of wind-blown sand high-fill roadbed Technical Field The invention belongs to the technical field of roadbed engineering monitoring, and particularly relates to an automatic monitoring system and method for stability of a wind-blown sand high-fill roadbed. Background In highway construction in desert areas, the wind-blown sand high-fill roadbed is easy to generate sedimentation and lateral displacement under the action of load and environmental factors, and the traditional manual periodic measurement mode has the inherent defects of low efficiency, discrete data and incapability of real-time continuous monitoring. The existing automatic monitoring technology can realize continuous data acquisition, but the fixed datum point on which the deep horizontal displacement monitoring depends can generate slow drift which is difficult to detect in a loose sandy foundation for a long time. The potential instability of the standard can cause systematic errors of the monitoring data, cause erroneous judgment, and can not provide an absolute reliable data basis for long-term stability evaluation and early warning of the roadbed. It is highly desirable to provide an automated monitoring system and method for stability of a high-fill subgrade with aeolian sand. Disclosure of Invention In view of the above, the present invention provides an automatic monitoring system and method for stability of a high-fill subgrade by aeolian sand, which are used for solving the above problems. In order to achieve the above purpose, the present invention adopts the following technical scheme: an automated aeolian sand high-fill subgrade stability monitoring system, comprising: The layered settlement monitoring module comprises at least one group of layered settlement meters which are distributed along the depth direction of the roadbed and are used for measuring settlement amounts of different soil layers in the roadbed; The deep horizontal displacement monitoring module comprises at least one group of guide wheel inclinometers embedded into the roadbed and is used for measuring the horizontal displacement of the deep part of the roadbed; The data acquisition module is connected with the layered settlement meter and the guide wheel type inclinometer and is used for automatically acquiring settlement and horizontal displacement according to preset frequency; the communication module is connected with the data acquisition module and is used for remotely transmitting acquired data; And the data analysis and early warning module is used for receiving and storing data and carrying out stability analysis and early warning. Further, the layered settlement monitoring module comprises two groups of layered settlement meters symmetrically distributed at the road shoulder positions at two sides of the same cross section of the roadbed, and each group comprises at least four monitoring points distributed along the depth. Further, the system also comprises an environmental parameter monitoring module, wherein the environmental parameter monitoring module comprises an anemograph and an air hygrothermograph and is used for monitoring the wind speed, the wind direction, the temperature and the humidity around the roadbed. Further, the bottom of the guide wheel type inclinometer is integrated with a high-precision micro-motion sensor for continuously monitoring the self micron-level displacement. Further, the data analysis and early warning module generates a roadbed stability status report and early warning information by comparing real-time data with a preset threshold or historical change trend. The automatic monitoring system for the stability of the aeolian sand high-fill roadbed is characterized by comprising the following steps of: s1, after roadbed filling is completed, determining point positions at the positions of monitoring section shoulders, and downwards drilling holes to a preset motionless layer; S2, installing a layered settlement meter and a guide wheel type inclinometer, wherein each monitoring point of the layered settlement meter is distributed according to the design depth, the guide wheel type inclinometer is vertically installed along an inclinometer pipe, and the micro-motion sensor at the bottom of the inclinometer pipe is ensured to be in position; s3, connecting and debugging a data acquisition module and a communication module, and setting an automatic acquisition frequency; S4, starting the system, carrying out long-term, continuous and automatic data acquisition and remote transmission, and periodically analyzing the micro-motion sensor data to confirm the reliability of the displacement calculation reference; And S5, analyzing the layered settlement rule and the deep horizontal displacement trend of the roadbed based on the reliable monitoring data, and evaluating the stability of the roadbed. Further, in step S1, the horizontal intervals of the monitoring points at two s