G309萊西段危橋改建工程建設(shè)方案研究
發(fā)布時間：2018-12-14 12:17
【摘要】：由于我國公路事業(yè)發(fā)展層次不同,部分國省道上的現(xiàn)役橋梁建于上世紀六七十年代,由于當時建設(shè)水平不高、技術(shù)標準較低、服役年齡較長,且當今重載、超載車輛的增多,給這部分橋梁帶來了使用上的安全隱患。 對舊橋進行改造,一方面可以保證人民群眾的生命財產(chǎn)安全,推動和諧社會建設(shè)的步伐：另一方面可以保持國省道的連續(xù)性,充分發(fā)揮國省道對經(jīng)濟發(fā)展的帶動和促進作用。其中科學、合理、經(jīng)濟的建設(shè)方案是保證舊橋改造成功與否的前提和關(guān)鍵性因素。 本論文選取G309萊西段上的史家莊橋、洙河橋和大沽河橋為研究對象展開對危橋改造建設(shè)方案的研究。其主要研究內(nèi)容如下： (1)用基于定基法的預測原理,從時間序列角度來預測本論文自然增長的交通量。誘增交通量采用定性分析的方法確定。通過預測交通量結(jié)果的分析確認了橋梁改建的必要性； (2)從危橋改造的建設(shè)條件和技術(shù)標準出發(fā),結(jié)合橋梁現(xiàn)有病害分析制定相關(guān)建設(shè)方案,從建設(shè)方案的結(jié)構(gòu)一致性、整體性和工程造價等方面對和建設(shè)方案進行綜合論證; (3)采用“有無對比法”對危橋改造建設(shè)方案的經(jīng)驗效益進行計算分析,來確定所采取建設(shè)方案的國民經(jīng)濟內(nèi)部收益率、經(jīng)濟凈現(xiàn)值、費用效益比和投資回收年限； (4)結(jié)合危橋改造項目實際情況,同時參考一級公路計算模型與系數(shù),制定了危橋改造項目節(jié)能評價的計算模型。 從最終確定的危橋該橋建設(shè)方案來看,方案結(jié)構(gòu)合理、整體性好,國民經(jīng)濟內(nèi)部收益率為12.95%。從敏感性分析結(jié)果表明,效益減少10%同時建設(shè)費用增加10%的不利情況下,國民經(jīng)濟內(nèi)部收益率為9.97%高于8%的社會折現(xiàn)率。建設(shè)期及養(yǎng)護需耗用能源約1208.23噸標準煤,運營期節(jié)約能源約1500噸標準煤。
[Abstract]:Because of the different levels of highway development in China, the active bridges on provincial highways in some countries were built in the 1960s and 1970s. At that time, the construction level was not high, the technical standards were low, the service age was relatively long, and the heavy load and overloaded vehicles were increasing. To this part of the bridge brought safety risks in use. On the one hand, the reconstruction of the old bridge can ensure the safety of the people's life and property and promote the pace of building a harmonious society. On the other hand, it can maintain the continuity of the national provincial road and give full play to the role of the national provincial road in driving and promoting economic development. The scientific, reasonable and economical construction scheme is the premise and key factor to ensure the success of the old bridge reconstruction. In this paper, Shijiazhuang Bridge, Suhe Bridge and Dagu River Bridge in G309 Laixi section are selected as the research objects to study the reconstruction and construction scheme of the dangerous Bridge. The main research contents are as follows: (1) based on the prediction principle of fixed basis method, the natural growth of traffic volume in this paper is predicted from the point of view of time series. The induced traffic volume is determined by qualitative analysis. The necessity of bridge reconstruction is confirmed by analyzing the result of forecasting traffic volume. (2) starting from the construction conditions and technical standards of the reconstruction of the dangerous bridge, combining with the analysis of the existing diseases of the bridge, the relevant construction plans are formulated, and the structural consistency of the construction scheme is considered. The integrality and construction cost of the project are discussed in the aspects of integrality and construction cost. (3) calculating and analyzing the experience benefit of the reconstruction scheme of dangerous bridge by using the method of "with or without comparison", to determine the internal rate of return, the net present value of economy, the ratio of cost to benefit and the years of return of investment; (4) combined with the actual situation of the dangerous bridge reconstruction project and referring to the calculation model and coefficient of the first-grade highway, the calculation model of the energy-saving evaluation of the dangerous bridge reconstruction project is established. From the view of the final construction plan of the dangerous bridge, the structure of the scheme is reasonable, the integrity is good, and the internal rate of return of the national economy is 12.95%. The results of sensitivity analysis show that when the benefit is reduced by 10% and the construction cost is increased by 10%, the internal rate of return of the national economy is 9.97% higher than the social discount rate of 8%. Energy consumption is about 1208.23 tons in construction period and maintenance period, and energy saving in operation period is about 1500 tons standard coal.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.6
本文編號：2378598
[Abstract]:Because of the different levels of highway development in China, the active bridges on provincial highways in some countries were built in the 1960s and 1970s. At that time, the construction level was not high, the technical standards were low, the service age was relatively long, and the heavy load and overloaded vehicles were increasing. To this part of the bridge brought safety risks in use. On the one hand, the reconstruction of the old bridge can ensure the safety of the people's life and property and promote the pace of building a harmonious society. On the other hand, it can maintain the continuity of the national provincial road and give full play to the role of the national provincial road in driving and promoting economic development. The scientific, reasonable and economical construction scheme is the premise and key factor to ensure the success of the old bridge reconstruction. In this paper, Shijiazhuang Bridge, Suhe Bridge and Dagu River Bridge in G309 Laixi section are selected as the research objects to study the reconstruction and construction scheme of the dangerous Bridge. The main research contents are as follows: (1) based on the prediction principle of fixed basis method, the natural growth of traffic volume in this paper is predicted from the point of view of time series. The induced traffic volume is determined by qualitative analysis. The necessity of bridge reconstruction is confirmed by analyzing the result of forecasting traffic volume. (2) starting from the construction conditions and technical standards of the reconstruction of the dangerous bridge, combining with the analysis of the existing diseases of the bridge, the relevant construction plans are formulated, and the structural consistency of the construction scheme is considered. The integrality and construction cost of the project are discussed in the aspects of integrality and construction cost. (3) calculating and analyzing the experience benefit of the reconstruction scheme of dangerous bridge by using the method of "with or without comparison", to determine the internal rate of return, the net present value of economy, the ratio of cost to benefit and the years of return of investment; (4) combined with the actual situation of the dangerous bridge reconstruction project and referring to the calculation model and coefficient of the first-grade highway, the calculation model of the energy-saving evaluation of the dangerous bridge reconstruction project is established. From the view of the final construction plan of the dangerous bridge, the structure of the scheme is reasonable, the integrity is good, and the internal rate of return of the national economy is 12.95%. The results of sensitivity analysis show that when the benefit is reduced by 10% and the construction cost is increased by 10%, the internal rate of return of the national economy is 9.97% higher than the social discount rate of 8%. Energy consumption is about 1208.23 tons in construction period and maintenance period, and energy saving in operation period is about 1500 tons standard coal.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.6
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