رفتارسنجی وضعیت آبگذرها و رویه جاده جنگلی غیرآسفالته در شرایط ترافیک مختلف.

Background and Objectives: The construction of a forest road disturbs the natural balance of water flow in the forest area. This balance can be maintained to a large extent by installing culverts and building side channels in different traffic routes. Culverts or drainage structures, as well as the road surface, often reflect anomalies caused by varying traffic intensities on the road surface. These enable a road manager to determine the severity of destruction and timely protection. Materials and Methods: In this study, the static and dynamic anomalies of culverts and surface of forest roads at different traffic levels were investigated in district #1 of Reyhanabad and Pajim of Al-Ghadir Khalil Shahr forestry plans. First, specifications of all culverts (pipe or concrete) including thickness, diameter, length, depth, culvert installation slope and angle, road slope and flow rate of the culvert were measured using a clinometer and tape meter. The discharge rate was calculated by measuring the flow cross-section and flow velocity as a function of hydraulic radius, Manning's coefficient and flow slope. In the section of static anomalies, the health level of culvert in 4 classes and the condition index of unpaved roads (UPCI-unpaved road condition index) were measured. The dynamic anomaly includes the amount of culvert vibration during vehicle passages was calculated using a vibrometer. Results: The results showed that with increasing culvert installation depth and traffic levels, the numerical value of UPCI decreased. The lowest UPCI values were recorded on slopes <5%. Culvert health increased with increasing installation angle. The lowest values of culvert health were measured on slopes < 5%. In general, the lowest level of vibration was measured in the case of unarmored culverts that were installed at a depth of 50-100 cm, with a slope of 5-8% and an angle of 100-120 degrees on road with low traffic. In routes with a traffic intensity of > 4 vehicles per day, the culvert vibration level was estimated at 2.24 Richter while it is estimated at 1.99 Richter on routes with an intensity of < 4 vehicles per day. The culvert reinforcement and depth had a positive effect on the culvert vibration level. [ABSTRACT FROM AUTHOR]