Tunnel Portal District Key Technology Research of Soil and Water Conservation
|School||Chongqing Jiaotong University|
|Course||Bridge and Tunnel Engineering|
|Keywords||Tunnel Portal area Soil erosion Soil and Water Conservation Ecologicalprotection|
China’s increasingly serious soil erosion has become a serious problem. China at a reasonable utilization, protection, improvement of water resources, as well as soil and water conservation has made considerable achievements. However, due to the unreasonable production and development, the inevitable human activities and other factors, the new soil erosion further intensified.Part of the Soil and Water Conservation of the tunnel is a road construction Soil and Water Conservation, Soil and Water Conservation of the tunnel portal area necessary to comply with the general principles of the highway Soil and Water Conservation, but also to meet features of Portal soil erosion. The main conclusions are as follows:(1) Through the Tunnel Portal Survey soil erosion, soil erosion on the tunnel portal area classification, understanding soil erosion hazards. And analyze and summarize its erosion mechanism, influencing factors for soil and water conservation study provides a theoretical basis.(2) According to the main tunnel portal area engineering, construction site, construction of access roads spoil ground and the different characteristics of the four regions, summed discusses the appropriate conservation measures. Special settings for drainage ditches, slopes different stages of development support measures put forward its own analysis suggests.(3) through a comparative analysis of existing ecological slope protection technology, will be divided into vegetation and soil improvement combined form, vegetation, and the combination of two forms of engineering measures and clarify various protective technology features and applicability. To object element method based on the theory established Portal ecological slope protection system evaluation system, including the proposed anti-pullout force, shear strength and other16-hole door slope ecological protection system evaluation, and establishes the evaluation grade standards.(4) for the blessing eggplant Road Tunnel engineering solutions, covering other aspects of the situation and earthwork balance was evaluated, analyzed its main engineering functions with soil and water conservation measures, and proposed improvement measures.