本文關(guān)鍵詞：重慶南山隧道對涂山湖跨線橋的影響研究及安全評估　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 溶洞 水壓力 有限元分析 爆破震動(dòng) 隧道施工

【摘要】：自我國建國以來,經(jīng)濟(jì)迅猛發(fā)展的同時(shí),各城市大幅增長的車流和人流已經(jīng)與相對狹小的城市工件產(chǎn)生了不可調(diào)和的矛盾。因此,我們在城市高速路的設(shè)計(jì)中,為了滿足行車速度的要求,就需要架設(shè)許多的公路橋涵和隧道。特別是在山區(qū),橋隧的架設(shè)對提升城市快速路的服務(wù)水平有著舉足輕重的作用。本文以南山隧道開挖為工程依托,工作重點(diǎn)為:①南山隧道穿越富水區(qū)時(shí),建立隧道,溶洞,橋墩的三維有限元模型,對開挖導(dǎo)致的橋墩下部的溶洞內(nèi)水壓力改變對上覆橋墩影響進(jìn)行數(shù)值模擬,對比與實(shí)測數(shù)值與規(guī)范標(biāo)準(zhǔn),確定水壓力是否是影響橋墩沉降的主要因素,并進(jìn)一步確定結(jié)構(gòu)是否安全;②南山隧道進(jìn)行爆破施工時(shí),有限元模擬和實(shí)測數(shù)據(jù)分析爆破對橋墩柱的影響,對比規(guī)范,評定結(jié)構(gòu)是否安全;通過本文對南山隧道的理論與大量寶貴的監(jiān)測數(shù)據(jù)的研究,針對隧道設(shè)計(jì)和施工的不同階段,得出了相應(yīng)的結(jié)論:①設(shè)計(jì)階段,在水資源豐富的碳酸鹽地域,需按最不利因素進(jìn)行布載,對溶洞內(nèi)的水壓力釋放進(jìn)行數(shù)值模擬,確保既有構(gòu)筑物的安全。②在隧道施工穿越富水層時(shí),光面爆破按照三米的進(jìn)度,深埋隧道的爆破震動(dòng)是不會(huì)對地表既有構(gòu)筑物產(chǎn)生本質(zhì)的影響,震速位移都在規(guī)范范圍內(nèi),結(jié)構(gòu)安全。
[Abstract]:Since the founding of our country, the rapid development of economy at the same time, the large increase of traffic and passenger flow of cities has produced irreconcilable contradiction with the relatively narrow urban workpiece. Therefore, we are in the design of urban highway. In order to meet the requirements of driving speed, it is necessary to set up many highway bridges and tunnels, especially in mountain areas. The erection of bridge and tunnel plays an important role in improving the service level of urban expressway. Based on the excavation of Nanshan Tunnel, this paper focuses on the establishment of tunnels and caves when the South Mountain Tunnel crosses the water-rich area. The three-dimensional finite element model of the pier is used to simulate the influence of the water pressure change in the cavern of the lower part of the pier on the overlying pier, and the comparison with the measured value and the standard of the code is carried out. Determine whether the water pressure is the main factor affecting the settlement of the pier, and further determine whether the structure is safe or not; 2in the blasting construction of Nanshan tunnel, finite element simulation and measured data are used to analyze the influence of blasting on the pier column, and compare the specifications to evaluate whether the structure is safe or not; Based on the study of the theory of Nanshan Tunnel and a lot of valuable monitoring data, the paper draws the corresponding conclusion in the carbonate area of abundant water resources in the design and construction stages of the tunnel. It is necessary to carry out numerical simulation of water pressure release in the cave according to the most disadvantageous factors to ensure the safety of the existing structure .2 when the tunnel construction passes through the water-rich layer the smooth blasting is carried out according to the schedule of three meters. The blasting vibration of the deep buried tunnel will not have any essential influence on the existing structures on the ground, and the displacement of seismic velocity is within the range of specifications, and the structure is safe.
【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】：2015
【分類號】：U456.3

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