本文選題：線域工程　切入點：植被　出處：《中南大學》2014年碩士論文　論文類型：學位論文

【摘要】：摘要：我國泥石流廣泛發(fā)育且危害嚴重,其對公路、鐵路等線域工程運營安全威脅尤為突出。目前國內外現(xiàn)行規(guī)范中缺乏植被對線域泥石流成因的系統(tǒng)論述,以致沿線生態(tài)防治工程缺乏可靠依據(jù)。本文以廣州至樂昌高速公路為研究區(qū),開展了沿線泥石流致災過程中植被影響的分析與生態(tài)防治措施建議,本文主要工作和研究成果如下： (1)基于樂廣高速公路沿線多條泥石流溝的現(xiàn)場調查及本區(qū)基礎資料的收集,分析了植被在泥石流孕災環(huán)境中的作用,重點探討了植被對泥石流物源和水源約束的抑災作用。 (2)基于已有植被對泥石流形成條件、活動特征的研究成果,通過大瑤山隧道口泥石流災例,進行了植被對泥石流發(fā)展、演化過程中力學性能影響的分析�；谀Σ亮W理論,構建了根系加筋效果的試算方法,并對災例中杉木對泥石流物源加固力的計算。 (3)針對現(xiàn)場調研中松柏樹未受破壞現(xiàn)象,構建了松柏樹對泥石流物源加固作用的plaxis有限元模型,模擬了松柏根系生長方向及樹種間距對物源加固作用的影響,數(shù)值分析結果表明：根系垂直坡面生長效果最佳。同時得到加固效果最佳的松柏間距。 (4)針對泥石流研究區(qū)淺根系竹子成片破壞現(xiàn)象,考慮了風荷載作用,參照路基病害中的翻漿冒泥病害,得到了竹子在臺風暴雨作用下將加速裂縫開展及降雨入滲的破壞機理及對泥石流啟動的促進作用。 (5)分析并總結植被影響下泥石流對橋梁工程致災模式,提出了植被在泥石流爆發(fā)過程中的減災作用及其對泥石流承災鏈的改變作用。針對樂廣高速研究區(qū)泥石流工程實際,提出泥石流生態(tài)防治建議,為泥石流災害防災減災提供了一定理論依據(jù)。
[Abstract]:Abstract: landslides in China are widely developed and serious damage to the highway, railway line, threatening the safety of domain engineering operation is particularly prominent. At home and abroad in the current specification lack of vegetation on the formation of debris flow system on line, the lack of reliable basis that the ecological control project. Based on the Guangzhou Lechang expressway as the research area, carried out the debris flow analysis and ecological control measures in the process of disaster affected, the main work and research results are as follows:
(1) based on the field investigation of several debris flow gullies along the Yue Guang Expressway and the collection of basic data in this area, the role of vegetation in the disaster environment of debris flow is analyzed, and the disaster suppression effect of vegetation on debris flow and source restraint is mainly discussed.
(2)鍩轟簬宸叉湁妞嶈瀵規(guī)償鐭蟲祦褰㈡垚鏉′歡,媧誨姩鐗瑰緛鐨勭爺絀舵垚鏋，

本文編號：1614699