山區(qū)高墩橋梁建設(shè)期風(fēng)險(xiǎn)評(píng)估
發(fā)布時(shí)間：2019-01-12 17:41
【摘要】：中國(guó)高速公路經(jīng)過(guò)本世紀(jì)第一個(gè)十年的高速發(fā)展,進(jìn)入了新的發(fā)展階段。隨著東部沿海地區(qū)國(guó)家高速公路網(wǎng)絡(luò)建設(shè)基本成型,高速公路的建設(shè)轉(zhuǎn)入國(guó)家中西部地區(qū),進(jìn)入山嶺重丘復(fù)雜的地形區(qū)域。為了跨越復(fù)雜地形地貌,山區(qū)高墩橋梁大量修建,由于山區(qū)特殊地形、地貌、水文、地質(zhì)、氣候條件,使得山區(qū)高墩橋梁施工難度大,建設(shè)周期長(zhǎng),現(xiàn)場(chǎng)隱患多。頻繁發(fā)生的山區(qū)高墩橋梁施工事故,造成了巨大的財(cái)產(chǎn)損失與人員傷亡,引起了國(guó)家相關(guān)部門的高度重視。本文圍繞山區(qū)高墩橋梁建設(shè)期間的風(fēng)險(xiǎn)評(píng)估開展研究,主要成果如下：1.研究了山區(qū)高墩橋梁建設(shè)期風(fēng)險(xiǎn)評(píng)估理論,探討了風(fēng)險(xiǎn)的概念、風(fēng)險(xiǎn)的相關(guān)特征以及風(fēng)險(xiǎn)評(píng)估的基本原理。2.通過(guò)對(duì)各種風(fēng)險(xiǎn)評(píng)估方法進(jìn)行分析研究,探討了層次分析法、加速遺傳算法。針對(duì)層次分析法中判斷矩陣的一致性檢驗(yàn)計(jì)算過(guò)程繁瑣復(fù)雜、遺傳算法中的早熟收斂、后期收斂速度慢及精度差等問題。本文提出了基于加速遺傳算法的層次分析法(AGA-AHP)計(jì)算風(fēng)險(xiǎn)層次模型中各風(fēng)險(xiǎn)因素重要性排序權(quán)值和檢驗(yàn)判斷矩陣的一致性,以此為基礎(chǔ),運(yùn)用模糊數(shù)學(xué)理論形成一個(gè)基于不完整信息的多層次模糊綜合評(píng)價(jià)法,量化各風(fēng)險(xiǎn)因素的風(fēng)險(xiǎn)大小。結(jié)合三種方法的優(yōu)點(diǎn),使整個(gè)風(fēng)險(xiǎn)評(píng)估過(guò)程更為客觀,最大減小風(fēng)險(xiǎn)評(píng)估系統(tǒng)中的人為主觀的影響,同時(shí)直觀表現(xiàn)各風(fēng)險(xiǎn)因素的重要程度,將相應(yīng)的指標(biāo)量化,讓評(píng)估結(jié)果明確。3.將層次分析法、加速遺傳算法、模糊綜合評(píng)價(jià)法三者結(jié)合起來(lái)的綜合風(fēng)險(xiǎn)評(píng)估方法實(shí)際應(yīng)用于山區(qū)橋梁高墩建設(shè)期風(fēng)險(xiǎn)評(píng)估,以廈門至成都國(guó)家高速公路湖南境內(nèi)某特大橋?yàn)楣こ瘫尘斑x取橋墩建設(shè)過(guò)程作為山區(qū)高墩橋梁建設(shè)期風(fēng)險(xiǎn)評(píng)估的專項(xiàng)示例,收集工程相關(guān)信息,分析工程潛在風(fēng)險(xiǎn)因素、進(jìn)行風(fēng)險(xiǎn)識(shí)別,運(yùn)用層次分析法建立風(fēng)險(xiǎn)層次模型,結(jié)合加速遺傳算法計(jì)算風(fēng)險(xiǎn)因素重要性權(quán)值wi及一致性檢驗(yàn),最后結(jié)合模糊理論劃分風(fēng)險(xiǎn)等級(jí)評(píng)價(jià)集,以重要性權(quán)值wi為基礎(chǔ)計(jì)算出各風(fēng)險(xiǎn)因素風(fēng)險(xiǎn)等級(jí)隸屬度P(i),最終確定該大橋高墩建設(shè)期的風(fēng)險(xiǎn)等級(jí)為“四等風(fēng)險(xiǎn)”。其風(fēng)險(xiǎn)評(píng)估結(jié)果證明該綜合評(píng)估方法能有效反映橋墩建設(shè)期間的各風(fēng)險(xiǎn)因素隸屬層次關(guān)系,正確評(píng)估高墩建設(shè)期間的風(fēng)險(xiǎn)狀態(tài),為后續(xù)風(fēng)險(xiǎn)決策提供了理論依據(jù)。同時(shí)也驗(yàn)證了該評(píng)估方法的有效性與實(shí)用性,對(duì)山區(qū)高墩橋梁風(fēng)險(xiǎn)評(píng)估有著實(shí)用意義。
[Abstract]:After the rapid development in the first ten years of this century, the expressway in China has entered a new stage of development. With the formation of the national highway network in the eastern coastal areas, the highway construction has been transferred to the central and western regions of the country, and into the complex terrain area of the mountains and hills. In order to span the complex terrain and geomorphology, a large number of bridges with high piers are built in mountainous areas. Due to the special terrain, geomorphology, hydrology, geology and climate conditions, the construction of high pier bridges in mountainous areas is difficult, the construction period is long, and there are many hidden dangers on the spot. The frequent construction accidents of high-pier bridges in mountainous areas have caused huge property losses and casualties, which have aroused great attention of the relevant departments of the state. This paper focuses on the risk assessment of high pier bridges in mountainous areas. The main results are as follows: 1. This paper studies the theory of risk assessment of high pier bridges in mountainous area, discusses the concept of risk, the related characteristics of risk and the basic principle of risk assessment. 2. Through the analysis and research of various risk assessment methods, the analytic hierarchy process (AHP) is discussed to accelerate the genetic algorithm (GA). In order to solve the problems such as complicated calculation process of consistency checking of judgement matrix in AHP, premature convergence in genetic algorithm, slow convergence speed and poor precision in late stage, etc. In this paper, an accelerated genetic algorithm based Analytic hierarchy process (AGA-AHP) is proposed to calculate the consistency of the ranking weight and the test judgment matrix of the importance of each risk factor in the risk hierarchy model. A multi-level fuzzy comprehensive evaluation method based on incomplete information is formed by using fuzzy mathematics theory to quantify the risk of each risk factor. Combined with the advantages of the three methods, the whole process of risk assessment is more objective, and the human subjective influence in the risk assessment system is minimized. At the same time, the importance of each risk factor is intuitively represented, and the corresponding indicators are quantified. Make the assessment clear. 3. The comprehensive risk assessment method, which combines AHP, accelerated genetic algorithm and fuzzy comprehensive evaluation method, is applied to the risk assessment of high pier construction period of mountain bridges. Taking a large bridge in Hunan Province of Xiamen to Chengdu National Expressway as a background, the process of bridge pier construction is selected as a special example for risk assessment of high pier bridges in mountainous area, and relevant information is collected to analyze the potential risk factors of the project. Risk identification, using AHP to establish risk hierarchy model, combining with accelerated genetic algorithm to calculate the weight of risk factor wi and consistency test, finally combined with fuzzy theory to divide the risk rating evaluation set. Based on the importance weight value (wi), the risk grade membership degree of each risk factor is calculated. Finally, the risk grade of the high pier construction period of the bridge is determined to be "fourth grade risk" by P (i),. The result of risk assessment proves that the comprehensive evaluation method can effectively reflect the subordinate relationship of various risk factors during the construction of bridge piers, correctly evaluate the risk state during the construction of high piers, and provide a theoretical basis for subsequent risk decision-making. At the same time, the effectiveness and practicability of the evaluation method are verified, which is of practical significance to the risk assessment of high pier bridges in mountainous areas.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445
本文編號(hào)：2408032
[Abstract]:After the rapid development in the first ten years of this century, the expressway in China has entered a new stage of development. With the formation of the national highway network in the eastern coastal areas, the highway construction has been transferred to the central and western regions of the country, and into the complex terrain area of the mountains and hills. In order to span the complex terrain and geomorphology, a large number of bridges with high piers are built in mountainous areas. Due to the special terrain, geomorphology, hydrology, geology and climate conditions, the construction of high pier bridges in mountainous areas is difficult, the construction period is long, and there are many hidden dangers on the spot. The frequent construction accidents of high-pier bridges in mountainous areas have caused huge property losses and casualties, which have aroused great attention of the relevant departments of the state. This paper focuses on the risk assessment of high pier bridges in mountainous areas. The main results are as follows: 1. This paper studies the theory of risk assessment of high pier bridges in mountainous area, discusses the concept of risk, the related characteristics of risk and the basic principle of risk assessment. 2. Through the analysis and research of various risk assessment methods, the analytic hierarchy process (AHP) is discussed to accelerate the genetic algorithm (GA). In order to solve the problems such as complicated calculation process of consistency checking of judgement matrix in AHP, premature convergence in genetic algorithm, slow convergence speed and poor precision in late stage, etc. In this paper, an accelerated genetic algorithm based Analytic hierarchy process (AGA-AHP) is proposed to calculate the consistency of the ranking weight and the test judgment matrix of the importance of each risk factor in the risk hierarchy model. A multi-level fuzzy comprehensive evaluation method based on incomplete information is formed by using fuzzy mathematics theory to quantify the risk of each risk factor. Combined with the advantages of the three methods, the whole process of risk assessment is more objective, and the human subjective influence in the risk assessment system is minimized. At the same time, the importance of each risk factor is intuitively represented, and the corresponding indicators are quantified. Make the assessment clear. 3. The comprehensive risk assessment method, which combines AHP, accelerated genetic algorithm and fuzzy comprehensive evaluation method, is applied to the risk assessment of high pier construction period of mountain bridges. Taking a large bridge in Hunan Province of Xiamen to Chengdu National Expressway as a background, the process of bridge pier construction is selected as a special example for risk assessment of high pier bridges in mountainous area, and relevant information is collected to analyze the potential risk factors of the project. Risk identification, using AHP to establish risk hierarchy model, combining with accelerated genetic algorithm to calculate the weight of risk factor wi and consistency test, finally combined with fuzzy theory to divide the risk rating evaluation set. Based on the importance weight value (wi), the risk grade membership degree of each risk factor is calculated. Finally, the risk grade of the high pier construction period of the bridge is determined to be "fourth grade risk" by P (i),. The result of risk assessment proves that the comprehensive evaluation method can effectively reflect the subordinate relationship of various risk factors during the construction of bridge piers, correctly evaluate the risk state during the construction of high piers, and provide a theoretical basis for subsequent risk decision-making. At the same time, the effectiveness and practicability of the evaluation method are verified, which is of practical significance to the risk assessment of high pier bridges in mountainous areas.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 龐彥軍,劉開第;層次分析法一致性檢驗(yàn)不是排序的必要條件[J];河北建筑科技學(xué)院學(xué)報(bào);2002年04期
相關(guān)會(huì)議論文 前1條
1 阮欣;石雪飛;陳艾榮;;風(fēng)險(xiǎn)評(píng)估在橋梁工程中應(yīng)用的綜述與展望[A];中國(guó)公路學(xué)會(huì)橋梁和結(jié)構(gòu)工程分會(huì)2004年全國(guó)橋梁學(xué)術(shù)會(huì)議論文集[C];2004年
，本文編號(hào)：2408032
本文鏈接：http://sikaile.net/kejilunwen/jiaotonggongchenglunwen/2408032.html
最近更新
教材專著
