發(fā)布時間：2018-07-26 12:23

【摘要】：公路工程建設(shè)過程中會產(chǎn)生許多路塹、路堤邊坡,這些邊坡由于防護措施不當(dāng),往往會造成嚴(yán)峻的生態(tài)問題及安全問題,因而為了防止邊坡事故,恢復(fù)因施工導(dǎo)致的生態(tài)環(huán)境失衡,對邊坡進行生態(tài)防護勢在必行,對生態(tài)防護技術(shù)的研究變得迫在眉睫。本文重點對土工布進行研究,土工布作為一種建筑材料,其應(yīng)用非常廣泛。為了達到研究目的,設(shè)計了一種可變角度的室內(nèi)邊坡模擬裝置,該邊坡裝置由面板槽、底座、加勁桿、支撐桿和滑動絲桿螺母機構(gòu)組成,通過調(diào)節(jié)可以模擬邊坡角度在20°～70°之間的邊坡；設(shè)計了一套包括薄膜遮雨系統(tǒng)、降雨系統(tǒng)和穩(wěn)壓控流系統(tǒng)的降雨裝置,可以通過開關(guān)調(diào)節(jié)降雨強度及降雨面積,以滿足試驗降雨要求；開發(fā)了一種具有固土固砂防沖刷作用的土工布邊坡生態(tài)防護結(jié)構(gòu),使用土工布對邊坡進行生態(tài)防護從而達到防雨水沖刷、適合植被綠化的目的。試驗通過對土工布防護結(jié)構(gòu)不同覆蓋寬度、不同間隔距離及是否設(shè)置凸起構(gòu)造進行室內(nèi)試驗研究,分析試驗結(jié)果。選定最佳覆蓋寬度、最優(yōu)間隔距離及構(gòu)造形式,確定最佳工況作為土工布邊坡生態(tài)防護結(jié)構(gòu)的最佳選擇。然后對土工膜生態(tài)防護結(jié)構(gòu)進行研究,對比其與土工布生態(tài)防護機構(gòu)的優(yōu)劣。在室內(nèi)試驗的基礎(chǔ)上,展開對土工布防護結(jié)構(gòu)的室外試驗研究,檢驗了其室外情況下的防護效果。
[Abstract]:Many cutting and embankment slopes will occur in the course of highway engineering construction. These slopes often cause severe ecological problems and safety problems because of improper protective measures, so in order to prevent slope accidents, To restore the ecological environment imbalance caused by construction, it is imperative to carry out ecological protection on slope, and it is urgent to study ecological protection technology. As a kind of building material, geotextile is widely used in this paper. In order to achieve the research purpose, a kind of indoor slope simulation device with variable angle is designed. The slope device consists of a panel slot, a base, a stiffening rod, a supporting rod and a sliding wire rod nut mechanism. The slope with angle between 20 擄and 70 擄can be simulated by adjusting, and a set of rainfall devices including thin film rain shielding system, rainfall system and steady pressure control system are designed, which can adjust rainfall intensity and rainfall area by switch. In order to meet the demand of experimental rainfall, a geotextile slope ecological protection structure with soil consolidation and sand consolidation and scour prevention is developed. The geotextile is used to protect the slope from Rain Water scour, which is suitable for vegetation greening. Through the laboratory research on the different covering width, different spacing distance and whether to set up the raised structure of the geotextile protective structure, the test results are analyzed. The optimum coverage width, the optimal spacing distance and the structure form are selected, and the optimum working condition is determined as the best choice of the ecological protection structure of the geotextile slope. Then the structure of geotextile ecological protection was studied and compared with that of geotextile. On the basis of indoor test, the outdoor test research of geotextile protective structure was carried out, and the protective effect of geotextile protective structure was tested.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U417.1

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本文編號：2146001