Multi-data-source roadbed monitoring system and multi-data-source roadbed monitoring evaluation method for saline soil regions

Abstract

The invention discloses a multi-data-source roadbed monitoring system for saline soil regions. The system comprises a micro weather station. The micro weather station mounted in a roadbed site comprises a heat radiation sensor, a wind speed sensor, a rain gauge and a relative humidity meter. A displacement meter, a salt sensor, a volume and moisture content sensor, an accelerometer and an earth pressure sensor, which are buried in a roadbed along the depth direction of the roadbed in a layered mode, are electrically connected with a data acquisition and transmission device mounted in the roadbed site through connection lines. The multi-data-source roadbed monitoring system has the advantages that multi-data sources of the roadbed are acquired by the micro weather station and the data acquisition and transmission device, the acquired data are converted into the soil dynamic modulus, net evaporation rate, salt content and roadbed cumulative deformation before correlation analysis, damageto roads in the saline soil regions, such as pavement frost heaving, roadbed settlement and pavement cracking, are monitored, and the evaluation basis is provided for causes and improvement methods of the damage to roadbeds.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering in transportation engineering and civil engineering, and in particular relates to a multi-data source saline soil subgrade monitoring system and a monitoring and evaluation method thereof. Background technique [0002] A large number of infrastructures built and under construction in Northwest my country are located in inland saline soil areas, and the groundwater is brine with high salinity, mainly consisting of chloride salts and sulfates. In the construction of Lanzhou-Xinjiang Railway, Dunhuang Airport, Lanzhou New District Airport, Xinjiang Hami-Lop Nur Railway, Gansu National Highway 215 and Qinghai National Highway 315, a large number of reports have been made on the salt swelling and subsidence of foundations and subgrades. At present, the treatment of subgrade in saline soil areas mostly adopts the method of replacing the road bed with coarse granular materials, or laying...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a multi-data source saline soil subgrade monitoring system and its monitoring and evaluation method, aiming to solve the problem of road surface muddying, subgrade settlement and pavement problems caused by the prior art in the above background technology after long-term operation of roads in saline soil areas. The cause of cracking and other diseases cannot be systematically monitored and evaluated

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