Study On The Infiltrating Irrigation Technology For The Middle Isolated Grassland Greening In Expressway

At present , the irrigation methods of the middle isolated grassland of the expressway mainly are waterwheel irrigation and manpower irrigation, and the labour intensity, difficulty, is very great. Besides shipping distance is very great and the cost is very high , time and water are used a lot, the working security of the expressway is also not very good . At the same time ,if the redundant water of the flooding infiltrate through the road structure, the road disease will come into being quickly, such as slurrying, Rutting , Surge, transverse comer cracking, Settlement, Chapping and so on ,and the water damage of the road will be formed. With a great applied foreground, the infiltrating irrigation technology is the most suitable and practical method for the irrigation of the green spaces along the line of the expressway, and it will replace the conventional waterwheel irrigation and manpower irrigation in the construction and the management in the future, so the unblock of the road will be enhanced greatly. In the mean time ,once the infiltrating irrigation technology is applied to the irrigation of the vegetation, a great deal of water will be saved , and this can correspond to the idea that we build a society which the resources will be saved greatly, the environment will be friendly, and the development will be sustained.In the aspect of the material of the Seeping-pipe, a great lot of scientists have studied systemically. Presently, this technology can satisfy the development of the infiltrating irrigation basically, and has been spread to a certain extent. However, in the aspect of the design of the infiltration depth, the space between pipes , hydraulic pressure, length of the seeping-pipe, almost all scientists design them empirically and are short of scientifically guidance. Furthermore, this technology has been used only in the domain of the irrigation of the forestry and agriculture. As a whole, the study of the design of the infiltrating irrigation system is at a low grade, so it can't satisfy the development of maintenance of the middle isolated grassland.Therefore, the performance of the waterpower should be experimented systemically, so the law of the current can be studied exactly, and the infiltration depth, the space between pipes, hydraulic pressure, length of the seeping-pipe can be decided reasonably. According to the foregoing, improvement for the infiltrating irrigation techniques can be brought forward, so the technical support can be afforded effectively for the irrigation technique of the middle isolated grassland. Based on the foregoing, through the analyse of the uniformity and the stability of the water infiltrated and association with the experiment of the rubber-based porous pipe as subirrigation lateral, the suitable length of the seeping-pipe, the suitable hydraulic pressure, the suitable infiltration depth, can be decided scientifically, which can change the conventional design method that the suitable length of the seeping-pipe and other parameters has been decided experientially and glancingly. Besides, it will play an important role in optimizing the network of the piles and improving the level of irrigation for the middle isolated grassland of the expressway.