本文選題：路基滑坡 + 數(shù)值模擬��； 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：本文針對大足區(qū)寶頂石刻景區(qū)環(huán)線公路K11-K12段破壞型路基滑坡的穩(wěn)定性分析及整治措施為研究背景,采用定性分析、定量分析及數(shù)值模擬等手段對該高填方路基滑坡的穩(wěn)定性問題進(jìn)行分析評價并提出切實可行的整治措施。本文的主要研究內(nèi)容有:1.通過對工程現(xiàn)場的實地勘察,分析研究該滑坡區(qū)的地質(zhì)特征和環(huán)境條件,并現(xiàn)場取樣通過土工試驗得到巖土物理力學(xué)參數(shù),為該高填方路基滑坡的穩(wěn)定性的正確分析和整治方案的合理選擇提供了必要的、準(zhǔn)確的計算參數(shù)。2.通過研究該高填方路基滑坡體的基本形態(tài)特征和應(yīng)力-應(yīng)變特性,分析其滑坡基本原因,初步評價滑坡破壞機理和滑坡穩(wěn)定性。3.采用極限平衡法定量分析該滑坡分別在天然條件下和20年一遇降雨工況下的應(yīng)力應(yīng)變特征,并通過計算安全系數(shù)來進(jìn)行穩(wěn)定性分析評價。4.采用嚴(yán)格地Morgenstern-Price法并借助巖土結(jié)構(gòu)穩(wěn)定性分析通用軟件SLOPE/W建立邊坡地質(zhì)模型及數(shù)值計算模型,分析該滑坡在天然條件下和20年一遇降雨工況下的應(yīng)力特征與應(yīng)變特征,并計算最危險滑動面及最小安全系數(shù),最后進(jìn)行穩(wěn)定性分析及評價。5.對極限平衡法分析成果和數(shù)值模擬結(jié)果進(jìn)行整理研究,并根據(jù)滑坡所在工程條件與穩(wěn)定性現(xiàn)狀,遵循滑坡治理的原則,根據(jù)該滑坡破壞模式和寶頂路K11-K12段線路的特點,滑坡治理方案采用“抗滑樁+格構(gòu)植草護(hù)坡+截排水工程”。1-1′剖面為控制性剖面,在道路靠山側(cè)進(jìn)行抗滑樁支擋工程布置,2-2′剖面、3-3′剖面均為控制性剖面,結(jié)合道路線型進(jìn)行抗滑樁支擋工程布置。對滑坡側(cè)壁及后緣的不穩(wěn)定巖土體應(yīng)進(jìn)行清除,人工清除坡面之后,澆筑鋼筋混凝土格構(gòu)梁,種植草皮護(hù)坡;在滑坡邊界外側(cè)合理位置設(shè)置截水溝,對滑坡體上的拉張裂縫,應(yīng)采用覆蓋或者混凝土填實措施,防止地表水由張拉裂縫進(jìn)入滑體內(nèi)。坡腳截排水溝均應(yīng)設(shè)沉降縫,縫內(nèi)填瀝青瑪蹄脂油膏,溝內(nèi)壁用水泥砂漿勾縫。坡底排水溝與道路排水溝結(jié)合。6.經(jīng)過整治的邊坡安全系數(shù)滿足穩(wěn)定性要求,因此,采取該邊坡工程治理措施能夠有效應(yīng)對滑坡變形或失穩(wěn)對公路帶來的災(zāi)害隱患。
[Abstract]:Based on the research background of stability analysis and treatment measures of damaged subgrade landslide in K11-K12 section of circular road of Baoding stone carving scenic spot in Dazu district, qualitative analysis is adopted in this paper. The stability of the high embankment landslide is analyzed and evaluated by means of quantitative analysis and numerical simulation. The main content of this paper is: 1. The geological characteristics and environmental conditions of the landslide area are analyzed and studied by field investigation on the site of the project, and the geotechnical physical and mechanical parameters are obtained through geotechnical tests. It provides the necessary and accurate calculation parameter. 2 for the correct analysis of the stability of the high embankment landslide and the reasonable selection of the remediation scheme. By studying the basic morphological characteristics and stress-strain characteristics of the high embankment landslide, the basic causes of the landslide are analyzed, and the failure mechanism and stability of the landslide are preliminarily evaluated. The limit equilibrium method is used to analyze the stress-strain characteristics of the landslide under natural conditions and once in 20 years, respectively, and the safety factor is calculated to evaluate the stability of the landslide. The slope geological model and numerical calculation model are established by using the strict Morgenstern-Price method and the general software SLOPE/W for the stability analysis of rock and soil structure. The stress and strain characteristics of the landslide under natural conditions and once in 20 years rainfall are analyzed. The most dangerous sliding surface and the minimum safety factor are calculated. Finally, the stability analysis and evaluation are carried out. The analysis results and numerical simulation results of limit equilibrium method are analyzed and studied. According to the conditions and stability of the landslide, the principle of landslide treatment is followed, according to the failure mode of the landslide and the characteristics of the K11-K12 section of Baoding Road. The landslide control scheme adopts the section of "anti-slide pile grid planting grass slope protection and drainage engineering". The section of "1-1 'section" is the control section, and the layout of anti-slide pile supporting works on the side of the road to the mountain is all controlled section, the 2-2' section and the section "3-3 'section are all controlled sections." Combined with road alignment, anti-slide pile retaining engineering arrangement is carried out. The unstable rock and soil mass of the side wall and back edge of the landslide should be cleared, after the slope surface is cleared manually, the reinforced concrete lattice beam should be put into place to plant sod to protect the slope, and the reasonable position on the outside of the landslide boundary should be set up in the intercepting ditch to make the tension crack on the landslide body. Cover or concrete fill measures should be used to prevent surface water from tensile cracks into the slip body. At the foot of the slope, the sewer should be set up with settlement joint, the joint should be filled with asphalt maleate ointment, and the inner wall of the ditch should be hooked with cement mortar. Slope bottom drain and road drainage combined. 6. The safety factor of the treated slope can meet the requirements of stability. Therefore, adopting the slope engineering treatment measures can effectively deal with the hazards caused by the landslide deformation or instability on the highway.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.1

【參考文獻(xiàn)】

中國期刊全文數(shù)據(jù)庫 前7條

1 王來貴,黃潤秋;邊坡變形系統(tǒng)失穩(wěn)控制因素研究[J];地質(zhì)災(zāi)害與環(huán)境保護(hù);1997年02期

2 孫建華,王建華;我國地質(zhì)災(zāi)害防治工作綜述[J];西部探礦工程;1998年03期

3 戴自航;抗滑樁滑坡推力和樁前滑體抗力分布規(guī)律的研究[J];巖石力學(xué)與工程學(xué)報;2002年04期

4 趙尚毅,鄭穎人,時衛(wèi)民,王敬林;用有限元強度折減法求邊坡穩(wěn)定安全系數(shù)[J];巖土工程學(xué)報;2002年03期

5 李秀珍,許強,黃潤秋,湯明高;滑坡預(yù)報判據(jù)研究[J];中國地質(zhì)災(zāi)害與防治學(xué)報;2003年04期

6 王恭先;滑坡防治工程措施的國內(nèi)外現(xiàn)狀[J];中國地質(zhì)災(zāi)害與防治學(xué)報;1998年01期

7 羅麗娟;趙法鎖;;滑坡防治工程措施研究現(xiàn)狀與應(yīng)用綜述[J];自然災(zāi)害學(xué)報;2009年04期

，

本文編號：1962490