【摘要】：處于山區(qū)陡坡地段的橋梁樁基礎，由于受地形地勢高差大、地質(zhì)條件復雜多變及不合理施工等因素的影響，在施工期間難免會出現(xiàn)各種工程病害，直接影響工程進度，同時給施工埋下了安全隱患。目前山區(qū)陡坡橋梁樁基礎沒有較規(guī)范的施工標準和安全防護技術，更沒有一套針對陡坡橋梁樁基礎在施工期間的安全評價系統(tǒng)。為此，深入開展陡坡地段橋梁樁基礎在施工期間的安全評價系統(tǒng)研究，具有較強的現(xiàn)實意義。本文主要研究成果為： （1）基于橋梁上部結構安全性及建筑工程施工的安全管理等方面的評價研究，詳細闡述了各種評價方法的基本原理、適用范圍及其優(yōu)缺點，，構建了適合陡坡地段橋梁樁基礎在施工期間的安全評價方法。 （2）對樁基礎在施工期間所出現(xiàn)的各種工程病害現(xiàn)象進行歸納總結，并對其成因進行分析研究，為評價模型指標的選取提供參考依據(jù)。 （3）開展了陡坡地段橋梁樁基礎在施工期間安全評價指標體系和模糊綜合評價模型研究，通過利用層次分析法計算出各指標的權重值，采用模糊數(shù)學理論來構建其安全模糊綜合評價模型。 （4）通過對其安全模糊綜合評價模型進行計算，評價結果與實際工程現(xiàn)場情況相一致，足以說明本評價系統(tǒng)具有一定的合理性和可行性。 （5）根據(jù)評價結果及病害成因分析，提出具有針對性的防治措施，確保了施工進度和施工人員的安全，為處于山區(qū)地段橋梁樁基礎出現(xiàn)的工程病害提供一套適用性防護技術。 本論文成果一方面為山區(qū)陡坡地段橋梁樁基礎的施工提出一種切合實際的安全評價方法；另一方面為在施工期間出現(xiàn)的工程病害提供合理有效的技術依據(jù)，確保工程順利、安全、高效完成，具有一定的工程實用價值和理論意義。
[Abstract]:The bridge pile foundation in the steep slope of mountainous area is affected by the factors such as great difference in topographic height, complex and changeable geological conditions and unreasonable construction. During the construction period, various kinds of engineering diseases will inevitably appear, which will directly affect the progress of the project. At the same time, the safety hidden danger is buried in the construction. At present, there is no standard construction standard and safety protection technology for the pile foundation of steep slope bridge in mountainous area, and there is no safety evaluation system for the pile foundation of steep slope bridge during the construction period. Therefore, it is of great practical significance to study the safety evaluation system of bridge pile foundation in steep slope section during construction. The main research results of this paper are as follows: (1) based on the evaluation research on the safety of bridge superstructure and the safety management of construction, the basic principles, applicable scope, advantages and disadvantages of various evaluation methods are expounded in detail. The safety evaluation method of bridge pile foundation in steep slope section during construction is constructed. (2) summing up the phenomena of various engineering diseases occurring during the construction of pile foundation, and analyzing the causes of its formation, which provides a reference for the selection of evaluation model index. (3) the safety evaluation index system and fuzzy comprehensive evaluation model of bridge pile foundation in steep slope section during construction are studied, and the weight of each index is calculated by using AHP. Fuzzy mathematics theory is used to construct the fuzzy comprehensive evaluation model of safety. (4) through the calculation of its safety fuzzy comprehensive evaluation model, the evaluation results are consistent with the actual engineering situation, which shows that the evaluation system is reasonable and feasible. (5) according to the result of evaluation and the analysis of the cause of the disease, the paper puts forward the corresponding preventive measures to ensure the construction progress and the safety of the construction personnel, and to provide a suit of applicable protection technology for the engineering diseases of the bridge pile foundation in the mountainous area. On the one hand, this paper puts forward a practical safety evaluation method for the construction of bridge pile foundation in steep slope section in mountainous area, on the other hand, it provides a reasonable and effective technical basis for engineering diseases during construction to ensure the smooth construction of the project. It is safe and efficient, and has certain engineering practical value and theoretical significance.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.551

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