本文關(guān)鍵詞：公路邊坡抗震穩(wěn)定性的敏感性因素分析　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 公路邊坡 地震力 敏感度 安全系數(shù)

【摘要】：20世紀(jì)以來，隨著國民經(jīng)濟(jì)的快速增長，我國的交通事業(yè)也得到了迅猛發(fā)展。在高速公路建設(shè)過程中，將會(huì)遇到大量的公路邊坡。然而，公路邊坡的安全性容易受到外界環(huán)境影響。我國是一個(gè)地震多發(fā)國家，邊坡的穩(wěn)定性受到地震力作用，崩塌、失穩(wěn)現(xiàn)象時(shí)有發(fā)生，且地震發(fā)生的隨機(jī)性和不可測(cè)性，，以致在地震作用下邊坡穩(wěn)定性的研究內(nèi)容十分復(fù)雜。為了減少地震作用對(duì)公路邊坡穩(wěn)定性的影響，本文針對(duì)公路邊坡抗震穩(wěn)定性分析中敏感性因素問題，以十天高速公路陜西路段為依托，建立敏感性參數(shù)分析系統(tǒng)，探討各個(gè)影響因素的變化對(duì)公路邊坡穩(wěn)定性的影響，主要工作包括以下幾個(gè)方面： （1）對(duì)國內(nèi)外公路邊坡抗震穩(wěn)定性的相關(guān)資料開展了較系統(tǒng)的調(diào)研和檢索，分析了地質(zhì)構(gòu)造、巖土體結(jié)構(gòu)類型、地層巖性、地形地貌、水文地質(zhì)條件、地震荷載等因素對(duì)公路邊坡抗震穩(wěn)定性的影響。 （2）在國內(nèi)外資料調(diào)研、工程調(diào)查的基礎(chǔ)上，對(duì)公路邊坡滑動(dòng)失穩(wěn)機(jī)理和抗震穩(wěn)定性分析方法開展了較為深入的研究，同時(shí)引入公路邊坡抗震穩(wěn)定性的最小安全系數(shù)計(jì)算方法及所編制的計(jì)算軟件，對(duì)公路邊坡抗震穩(wěn)定性進(jìn)行計(jì)算分析。 （3）基于公路邊坡抗震穩(wěn)定性的最小安全系數(shù)計(jì)算方法及所編制的計(jì)算軟件，建立敏感性參數(shù)分析系統(tǒng)。利用該系統(tǒng)對(duì)公路邊坡中的不同邊坡形態(tài)（直線型、下陡上緩平臺(tái)臺(tái)階型、下緩上陡平臺(tái)臺(tái)階型）進(jìn)行敏感性參數(shù)分析：得出地震作用下公路邊坡安全系數(shù)與各個(gè)影響因素之間的變化規(guī)律、各個(gè)影響因素對(duì)邊坡安全系數(shù)的影響程度（敏感度）。 （4）以十天高速公路陜西路段為依托工程，在對(duì)工程工作區(qū)地震安全評(píng)價(jià)的基礎(chǔ)上，結(jié)合地質(zhì)勘探、巖土參數(shù)取樣試驗(yàn)，選擇了一處典型邊坡工程進(jìn)行敏感性參數(shù)分析，驗(yàn)證本文所得出的敏感性分析方法的準(zhǔn)確性。
[Abstract]:Since 20th century, with the rapid growth of the national economy, China's transportation industry has also been rapid development. In the process of highway construction, there will be a large number of highway slopes. The safety of highway slope is easy to be affected by external environment. China is an earthquake-prone country, the stability of slope is affected by earthquake force, collapse and instability occur from time to time. Because of the randomness and undetectability of earthquake occurrence, the study of slope stability under earthquake is very complicated. In order to reduce the influence of earthquake action on highway slope stability. Aiming at the problem of sensitivity factors in seismic stability analysis of highway slope, a sensitivity parameter analysis system based on Shaanxi section of 10-day expressway is established in this paper. This paper discusses the influence of various influencing factors on the stability of highway slope. The main work includes the following aspects: 1) the relative data of seismic stability of highway slope at home and abroad are systematically investigated and searched, and geological structure, structure type of rock and soil, stratigraphic lithology, topography and geomorphology, hydrogeological conditions are analyzed. The influence of earthquake load and other factors on the seismic stability of highway slope. 2) based on the investigation of domestic and foreign data and engineering investigation, the mechanism of sliding instability and seismic stability analysis method of highway slope are studied deeply. At the same time, the calculation method of minimum safety factor and the calculation software are introduced to calculate and analyze the seismic stability of highway slope. (3) the calculation method of minimum safety factor based on seismic stability of highway slope and the calculation software. The sensitivity parameter analysis system is established. The system is used to analyze the different slope shapes (linear type, steep up and gentle platform step type) in the highway slope. The sensitivity parameter analysis is carried out: the variation law between the safety factor of highway slope and the influencing factors under earthquake action is obtained. The influence of each factor on slope safety factor (sensitivity). On the basis of seismic safety evaluation of the work area of the Shitian Expressway in Shaanxi Province, combined with geological exploration, the geotechnical parameter sampling test is carried out. The sensitivity parameter analysis of a typical slope engineering is carried out to verify the accuracy of the sensitivity analysis method obtained in this paper.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U416.14

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本文編號(hào)：1389664