The Research Of The Geleshan Tunnel Constructing Dregs's Impact On The Soil Environment

The tunnel is often a controlling project of the railway construction. The abandon dreg from tunnel building make conspicuous impact on the surrounding environment, especially soil environment usually. This text takes tunnel construction of GeLeshan as an example to confirm the primary pollution source and main pollutant of the soil environment around the field where the garage was piled up firstly. Then the author have analysed the change law of space-time of the soil pollutants. The author makes use of index method and the fuzzily synthetical Judge method to assess pollution status of soil system on this basis. The main conclusions are as follows:(1) Study district soil primary pollution source are the abandon dreg and waste water from the GeLeshan tunnel dreg field blowdown ditch.(2) Studing district soil main pollutants include the heavy metal (chromium , lead , zinc) and petroleum , nitric acid root iron, inferior nitric acid root ion, explosive pollutants etc, and the content of pollutants is higher than contrasting pollutants content and regional background value.(3) There is obvious positive correlation between the content of soil and pollutant in the studying area, the pollution would appear compound pollution possibly.(4) The most of pollutants which seep into soil body accumulate on the top layer of the soil by analyzing migration principle vertically. The content of pollution factors reduces gradually with the increase of the depth.(5) The content of soil pollutants in the studying area is tapering off with lasting dreg field blowdown ditching.(6) The soil pollution of the wasteland and farmland where is on the eastern and the western of the GeLeshan tunnel abandon dreg field is more serious than which of the forestland and guard station.The above-mentioned results of study can offer decision for soil environment pollution control of constructing area of the GeLeshan tunnel to consult.