Design Of Water And Soil Conservation In Expressway Construction

Now China attaches great importance to the construction of the highway, highway construction on China’s social and economic development will have a major impact,thus enhancing the construction of highway construction has very important significance. Highway construction can promote the development of transport and transport for economic development plays an important role. Highway construction to accelerate the speed of transport and logistics,driven by local and regional economic development,sharp contradictions between the passenger and cargo links,strengthen exchanges within the region and between different regions, establish nationwide transportation network plays an important role. However,the construction of highway construction and highway has obvious difference,in the process of its construction usually cycle is longer, engineering total line length is far more than ordinary highway,the resulting environmental impact is particularly prominent. Among them,by the highway construction of soil and water loss is the problem of the representative.Highway construction may lead to soil and water loss is due to the slope excavation,excavation,foundation pit excavation,dewatering and drainage etc.earthwork is involved in the process of building,inevitably to the original landform,build base surface or rock layer caused by disturbance,coupled with the construction of waste soil and waste slag,the original surface of large trees,low shrubs,and flowers and plants preparation damage,which may seriously reduce the retention of the original vegetation on water and soil resources, resulting in the erosion of surface,and these are caused by human factors. Especially in the slope excavation and earth,if encountered heavy rain,storm,snow and other inclement weather,will deepen the slope erosion,increase construction around the range of soil and water loss,severe cases may even lead to landslides,landslides,mudslides and harm.In containing viaduct or across the river of highway construction projects,although there are relevant laws and regulations, but in the actual construction process,construction units and construction personnel often produced in the construction of construction waste such as disposable spoil spoil material such as local discharge into the river,the serious will directly lead to clogging up the river,affecting the river normal shipping and flood,even causing floods. The greater the area of soil and water loss,the wider the scope of its impact,the more serious the harm,at present,soil erosion problems in highway construction has become an urgent problem to be solved.To on highway construction process in soil and water loss prevention in advance and effective management to minimize the impact on the surrounding environment,improve water and soil conservation for Expressway plan establishment level,comprehensive system to deploy the highway soil has important and realistic significance to keep working.In order to solve this problem, usually related highway construction units will be combined with the local weather conditions, meteorological condition,hydrogeological condition, the use of the existing professional knowledge of soil and water conservation, follow the high creed of "prevention first, comprehensive control" according to the law of the natural environment, development and evolution,according to the local natural environment take reasonable measures of soil and water conservation. During the construction need at the same time to design, construction and civil engineering construction of soil and water conservation and use, also is what we usually speak of the "three simultaneity" strategy, to ensure that all kinds of artificial soil and water conservation measures and vegetation protection measures play a role, that minimize the impact of engineering on the surrounding ecological environment.This article in view of the environmental problems existing in the construction of highway, Dan expressway as the research object, through the literature research at home and abroad, analyses the reason of bring water loss and soil erosion in thehighway construction, and the theoretical knowledge and actual situation combined with Dan expressway, from the control target, the main research object, the composition of solution, safeguards the concrete scheme of multiple aspects such as design of soil and water conservation.