高海拔嚴(yán)寒地區(qū)石馬公路邊坡植被防護(hù)研究
發(fā)布時(shí)間：2019-01-01 09:50
【摘要】：近年來(lái),隨著我國(guó)西部大開(kāi)發(fā)戰(zhàn)略的實(shí)施,在公路、鐵路、水電等工程建設(shè)中,往往需要開(kāi)挖大量的邊坡,邊坡的開(kāi)挖不僅破壞了原有的植被和淺表部覆蓋層,而且導(dǎo)致大量的次生裸地和嚴(yán)重的水土流失,尤其在高海拔嚴(yán)寒地區(qū)更加劇了植被生態(tài)系統(tǒng)的退化。對(duì)于高海拔嚴(yán)寒地區(qū)邊坡的植被恢復(fù),國(guó)內(nèi)還研究較少。因此,如何快速恢復(fù)高海拔嚴(yán)寒地區(qū)公路開(kāi)挖邊坡的植被生態(tài)環(huán)境并實(shí)現(xiàn)坡面保護(hù)是一個(gè)亟需研究和解決的課題。 本文以石渠至馬尼干戈公路開(kāi)挖邊坡為研究對(duì)象,以巖土工程、植被學(xué)、土壤學(xué)、環(huán)境工程等學(xué)科為指導(dǎo),采用現(xiàn)場(chǎng)調(diào)研和室內(nèi)試驗(yàn)的方法,對(duì)高海拔嚴(yán)寒地區(qū)的土壤特性和適應(yīng)基材進(jìn)行研究,通過(guò)種植試驗(yàn)選取適宜草種,利用數(shù)值軟件模擬植物根系與巖土體相互作用關(guān)系,并從工程地質(zhì)、邊坡穩(wěn)定、環(huán)境工程三個(gè)方面對(duì)高海拔嚴(yán)寒地區(qū)的公路邊坡進(jìn)行植被恢復(fù)設(shè)計(jì),主要獲得了以下研究成果： 1)通過(guò)現(xiàn)場(chǎng)調(diào)研和室內(nèi)試驗(yàn),闡明了石馬公路的土壤特性,并由種植試驗(yàn)提出了高海拔嚴(yán)寒地區(qū)邊坡植被防護(hù)的“草-灌”結(jié)合的建植模式,為該公路的植被恢復(fù)提供了科學(xué)依據(jù)。 2)通過(guò)植被護(hù)坡理論分析得出：植物對(duì)邊坡穩(wěn)定性有影響,通過(guò)莖葉降雨截留,通過(guò)根系對(duì)土體進(jìn)行加固。草本植物主要是通過(guò)根系對(duì)土體進(jìn)行加筋作用,土體的含根量越多,土的抗剪強(qiáng)度越大,承載能力越高；木本植物主要通過(guò)垂直根系與水平根系對(duì)土體進(jìn)行錨固、摩擦作用,主根類(lèi)似全長(zhǎng)粘結(jié)型錨桿,將土體下滑推力傳遞到深層,并將所受的力傳遞到側(cè)根,通過(guò)側(cè)根與土體的摩擦阻力,平衡下滑土體的推力,進(jìn)而對(duì)邊坡穩(wěn)定性起作用。 3)通過(guò)建立4種計(jì)算模型,采用數(shù)值模擬方法探討了植被護(hù)坡的機(jī)理和效果。模擬結(jié)果表明,草本植物的根系與巖土體的相互作用是由于土壤中存在植物根系,邊坡表土層與根系成為根-土復(fù)合體,增加了土體的粘聚力和周邊應(yīng)力,改變了淺層土體的應(yīng)力應(yīng)變狀態(tài),土體中的應(yīng)力水平降低,限制了淺層土體的側(cè)向位移,草本植物根系能明顯增大邊坡表層土體的抗剪強(qiáng)度,增加邊坡的安全系數(shù),邊坡穩(wěn)定性得到提高。木本根系的固土作用主要通過(guò)主根系將表層土體的應(yīng)力傳遞到土體深層,并對(duì)深層土體進(jìn)行錨固,與錨固理論一致,將錨固理論運(yùn)用到根系的固土機(jī)理分析中是可行的。 4)植物根系的固土效應(yīng)主要體現(xiàn)在對(duì)邊坡淺層產(chǎn)生作用,對(duì)深層的土體效果不明顯�！安�-灌”結(jié)合的護(hù)坡方式對(duì)提高邊坡穩(wěn)定性最強(qiáng),草本植物護(hù)坡的方式次之,只有木本植物護(hù)坡的效果最差。 5)通過(guò)對(duì)石馬路典型的土質(zhì)邊坡和巖質(zhì)邊坡進(jìn)行植被恢復(fù)設(shè)計(jì),提出相應(yīng)的施工方法。濕式噴播技術(shù)和綠化基材噴射技術(shù)能夠?qū)κR公路的土質(zhì)邊坡及巖質(zhì)邊坡起到較好的防護(hù)作用,是適用于高海拔嚴(yán)寒地區(qū)公路邊坡的植被防護(hù)技術(shù)。
[Abstract]:In recent years, with the implementation of the strategy of western development in our country, in the construction of highway, railway, hydropower and other projects, a large number of slopes are often required to be excavated. The excavation of the slope not only destroys the original vegetation and shallow overburden. It also leads to a large number of secondary bare land and serious soil erosion, especially in high altitude cold areas, which aggravate the degradation of vegetation ecosystem. There are few researches on vegetation restoration of slope in high altitude cold area. Therefore, how to quickly restore the vegetation ecological environment of highway excavation slope in high altitude cold area and realize slope protection is an urgent task to be studied and solved. In this paper, the excavation slope of the Shiqu to Manigango highway is taken as the research object, the geotechnical engineering, vegetation science, soil science, environmental engineering and other disciplines are taken as the guidance, and the methods of field investigation and indoor test are adopted. The soil characteristics and adaptive substrates in high altitude cold area were studied. The suitable grass species were selected through planting experiment. The interaction between plant root system and rock and soil was simulated by numerical software, and the slope was stable from engineering geology. The vegetation restoration design of highway slope in high altitude cold area is carried out in three aspects of environmental engineering. The main research results are as follows: 1) through field investigation and indoor test, the soil characteristics of Shima highway are expounded. Based on the planting experiment, the "grass irrigation" combined planting model of slope vegetation protection in high altitude cold area is put forward, which provides a scientific basis for the vegetation restoration of the highway. 2) through the theoretical analysis of vegetation slope protection, it is concluded that plants have an effect on slope stability, and the soil is strengthened by stem and leaf rainfall, and soil is strengthened by root system. Herbaceous plants mainly strengthen the soil through the root system, the more the soil root content, the greater the shear strength of the soil, the higher the bearing capacity; Woody plants anchor and rub the soil through vertical root and horizontal root. The main root is similar to the full-length bonded anchor, which transfers the sliding thrust of the soil to the deep layer and the force to the lateral root. Through the friction resistance between the lateral root and the soil, the thrust of the sliding soil can be balanced, and then the stability of the slope will be affected. 3) the mechanism and effect of vegetation slope protection are discussed by establishing four kinds of calculation models and using numerical simulation method. The simulation results show that the interaction between herbaceous roots and rock soil is due to the presence of plant roots in the soil, and the slope topsoil and root system become root-soil complex, which increases the cohesion of soil and the surrounding stress. The stress and strain state of the shallow soil is changed, the stress level in the soil is reduced, and the lateral displacement of the shallow soil is limited. The herbaceous root system can obviously increase the shear strength of the surface soil of the slope and increase the safety factor of the slope. The slope stability has been improved. The soil consolidation function of woody root system mainly transfers the stress of the surface soil to the deep soil through the main root system, and anchors the deep soil mass, which is consistent with the anchoring theory. It is feasible to apply the anchoring theory to the analysis of the soil consolidation mechanism of the root system. 4) the soil consolidation effect of plant roots is mainly reflected in the effect on the shallow layer of the slope, but the effect on the deep soil is not obvious. The slope protection combined with "grass and irrigation" is the most effective way to improve slope stability, the herbaceous slope protection is the second, only woody plant is the worst. 5) through the vegetation restoration design of typical soil slope and rock slope of stone road, the corresponding construction method is put forward. The wet spraying technology and the greening base material spraying technology can protect the soil slope and the rock slope of Shima highway, and are suitable for the vegetation protection technology of highway slope in high altitude and severe cold area.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U416.14;U417.1
本文編號(hào)：2397384
[Abstract]:In recent years, with the implementation of the strategy of western development in our country, in the construction of highway, railway, hydropower and other projects, a large number of slopes are often required to be excavated. The excavation of the slope not only destroys the original vegetation and shallow overburden. It also leads to a large number of secondary bare land and serious soil erosion, especially in high altitude cold areas, which aggravate the degradation of vegetation ecosystem. There are few researches on vegetation restoration of slope in high altitude cold area. Therefore, how to quickly restore the vegetation ecological environment of highway excavation slope in high altitude cold area and realize slope protection is an urgent task to be studied and solved. In this paper, the excavation slope of the Shiqu to Manigango highway is taken as the research object, the geotechnical engineering, vegetation science, soil science, environmental engineering and other disciplines are taken as the guidance, and the methods of field investigation and indoor test are adopted. The soil characteristics and adaptive substrates in high altitude cold area were studied. The suitable grass species were selected through planting experiment. The interaction between plant root system and rock and soil was simulated by numerical software, and the slope was stable from engineering geology. The vegetation restoration design of highway slope in high altitude cold area is carried out in three aspects of environmental engineering. The main research results are as follows: 1) through field investigation and indoor test, the soil characteristics of Shima highway are expounded. Based on the planting experiment, the "grass irrigation" combined planting model of slope vegetation protection in high altitude cold area is put forward, which provides a scientific basis for the vegetation restoration of the highway. 2) through the theoretical analysis of vegetation slope protection, it is concluded that plants have an effect on slope stability, and the soil is strengthened by stem and leaf rainfall, and soil is strengthened by root system. Herbaceous plants mainly strengthen the soil through the root system, the more the soil root content, the greater the shear strength of the soil, the higher the bearing capacity; Woody plants anchor and rub the soil through vertical root and horizontal root. The main root is similar to the full-length bonded anchor, which transfers the sliding thrust of the soil to the deep layer and the force to the lateral root. Through the friction resistance between the lateral root and the soil, the thrust of the sliding soil can be balanced, and then the stability of the slope will be affected. 3) the mechanism and effect of vegetation slope protection are discussed by establishing four kinds of calculation models and using numerical simulation method. The simulation results show that the interaction between herbaceous roots and rock soil is due to the presence of plant roots in the soil, and the slope topsoil and root system become root-soil complex, which increases the cohesion of soil and the surrounding stress. The stress and strain state of the shallow soil is changed, the stress level in the soil is reduced, and the lateral displacement of the shallow soil is limited. The herbaceous root system can obviously increase the shear strength of the surface soil of the slope and increase the safety factor of the slope. The slope stability has been improved. The soil consolidation function of woody root system mainly transfers the stress of the surface soil to the deep soil through the main root system, and anchors the deep soil mass, which is consistent with the anchoring theory. It is feasible to apply the anchoring theory to the analysis of the soil consolidation mechanism of the root system. 4) the soil consolidation effect of plant roots is mainly reflected in the effect on the shallow layer of the slope, but the effect on the deep soil is not obvious. The slope protection combined with "grass and irrigation" is the most effective way to improve slope stability, the herbaceous slope protection is the second, only woody plant is the worst. 5) through the vegetation restoration design of typical soil slope and rock slope of stone road, the corresponding construction method is put forward. The wet spraying technology and the greening base material spraying technology can protect the soil slope and the rock slope of Shima highway, and are suitable for the vegetation protection technology of highway slope in high altitude and severe cold area.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U416.14;U417.1
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 趙青生;婁明連;;磁性肥料(誘導(dǎo)磁場(chǎng))對(duì)種子萌發(fā)影響的試驗(yàn)研究[J];安徽大學(xué)學(xué)報(bào)(自然科學(xué)版);1993年04期
2 宋維峰;陳麗華;劉秀萍;;林木根系固土作用數(shù)值分析[J];北京林業(yè)大學(xué)學(xué)報(bào);2006年S2期
3 李建章;李文軍;周文瑞;范東斌;高偉;;脲醛樹(shù)脂固化機(jī)理及其應(yīng)用[J];北京林業(yè)大學(xué)學(xué)報(bào);2007年04期
4 婁明連，婁天紅;磁性肥料應(yīng)用技術(shù)研究[J];磁性材料及器件;1995年01期
5 董世魁,馬金星,蒲小鵬,張起榮,潘臻武;高寒地區(qū)多年生禾草引種生態(tài)適應(yīng)性及混播組合篩選研究[J];草原與草坪;2003年01期
6 盧民安;蔣雙;;生態(tài)護(hù)坡技術(shù)[J];東北水利水電;2009年03期
7 呂春娟;陳麗華;宋恒川;汲文憲;郭峰;;植物根系固坡力學(xué)機(jī)理研究進(jìn)展[J];亞熱帶水土保持;2011年03期
8 符亦強(qiáng);;植被護(hù)坡機(jī)理及其工程應(yīng)用研究[J];湖南交通科技;2011年02期
9 林梅欽;董朝霞;彭勃;李明遠(yuǎn);吳肇亮;;交聯(lián)聚丙烯酰胺微球的形狀與大小及封堵特性研究[J];高分子學(xué)報(bào);2011年01期
10 周輝;范琪;;生態(tài)護(hù)坡中根系的加固機(jī)理與能力分析[J];公路;2006年12期
相關(guān)博士學(xué)位論文 前3條
1 張超波;林木根系固土護(hù)坡力學(xué)基礎(chǔ)研究[D];北京林業(yè)大學(xué);2011年
2 王華;植被護(hù)坡根系固土及坡面侵蝕機(jī)理研究[D];西南交通大學(xué);2010年
3 蓋小剛;林木根系固土力學(xué)特性研究[D];北京林業(yè)大學(xué);2013年
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