Seepage Field Analysis Of Slope Drainage By Interfering

Landslide is a common geological disasters, rainfall is the main factor which ca u-ses the water table rise and induce landslides. Therefore timely to reduce the water t able will be great significance to improve the stability of the slope, the current slope d r-ainage measures are as follows:underground drainage holes, horizontal drainage hoi es, sump pump, surface drains and drainage ditch blind, the main problem of these d rainage measures are list as follows:(1) slope drainage measures require a higher en vironment, often lack of many favorable topography conditions, all of these disadvant a-ges are resulting in difficult to ensure the effectiveness of drainage;(2) surface dra inage and shallow drainage that in order to improve slope stability is poor;(3) the co st of the construction of underground drainage tunnel is high,at the same time the pro cess of construction is complexity;(4) sump pump needs power and recurrent mana gement. Based on the above problems of drainage patterns, the paper proposed the us-e of a siphon drainage which is a free power method.By drilling downward inclined d eep holes into slope, keeping inclined hole orifice and bottom at relative height of les s than9m, leading ou-t the siphon drainage pipe from the bottom of the inclined hole, meanwhile preservin-g the siphon drainage pipe inlet and outlet on the same elevatio n, when the slope water table level rises, it can promptly drain away water. This meth od can achieve very g-ood effect when used on deep drainage, it can also be used to s olve large-scale landslides and ensure the low cost of the engineering with the purpos e keeping the stability of slope, also the governance process does not involve the exca vation of earth, the operation is simple, and drainage control measures is reliable and adaptable, drainage process are without power and recurring management.The paper is based on the research of groundwater level distribution which is a chieved by the siphon drainag,firstly we use analytical method as a preliminary study toget the groundwater infiltration curve after siphon drainage, secondly by using Matl ab programming for solving discreted equations of motion of groundwater, resulting i n a distributed groundwater head value and the infiltration curve in the researched are a. By studying the different positions and inclination, the distribution of groundwater infiltration curve after siphon drainage,we can find a better location and inclination fo r the siphon drainage hole,which provide a reference for practical siphon drainage eng ineering. Based on the above research,this paper also propose short-term and long-ter m drainage holes, which also offer a reference to the actual project selection. Single drainage hole is less in the actual project engineering because of its disadvantage.so th e paper pay more attention on the research of the drainage spacing which can greatly i nfluence the drainage effect under three different conditions, after the researching we get the reasonable well spacing which meet the standards of economic rational and rel iable. Finaly this paper study about the infiltration curves and drainage effect after dra inage in confined aquifer groundwater, and then get a more satisfactory drainage posit ion.Although siphon drainage technology have been used at home and abroad, but t he distribution of the water table and stability analysis after the siphon drainage is not enough and lack of a lots of theories, so it will be necessary to give a depth study on s iphon drainage, sought to successfully apply siphon drainage technology which is the free power method to get rid of deep groundwater to the actual project, it will be good for the construction of the motherland.