模拟边坡土壤虹吸排水试验研究

Study on siphon drainage of simulated slope soil

根据水力学中的虹吸原理,对模拟边坡土壤中的虹吸管过水量进行探究。通过试验与理论相结合推算出直径4 mm的虹吸管的沿程阻力系数,运用该阻力系数计算虹吸管在土壤中过水流量的关系,并进行试验研究。试验结果表明:土壤中埋设虹吸管的过水量随水位差增高而增大,当水位差大于3 m时将不能增加其过水量;土壤中埋设虹吸管的土层深度与管内过水量呈负相关,土层中土壤的渗透性是影响虹吸管过水量的主要因素。

According to the siphon principle in hydraulics,siphon discharge in simulated slope soil is explored. Siphon friction coefficient of 4 mm diameter is calculated by experiment and theory methods. Relationship of discharge between siphon and soil is studied by using the friction coefficient,experiment research is carried on. Test results show that：The discharge of siphon buried in soil is increased with the water level difference. The discharge will not increase when the water level difference is larger than 3 m. The discharge of siphon buried in soil is decreased with the soil depth. Soil permeability is the main factor affecting the discharge of siphon.