本文選題：高速公路 + 橋梁工程��； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：隨著社會(huì)建設(shè)與經(jīng)濟(jì)發(fā)展,越來(lái)越多高速公路需要穿過(guò)采空區(qū)。當(dāng)存在諸多原因,高速公路設(shè)計(jì)路線(xiàn)不能避讓采空區(qū)時(shí),只能在采空區(qū)上方穿過(guò)。煤層采動(dòng)后,會(huì)引起地表的移動(dòng)變形,會(huì)對(duì)高速公路結(jié)構(gòu)物產(chǎn)生一定的影響,威脅結(jié)構(gòu)安全,影響高速公路運(yùn)營(yíng)。根據(jù)采空區(qū)的開(kāi)采情況,可將采空區(qū)分為準(zhǔn)采空區(qū)、新采空區(qū)和老采空區(qū)。其中,準(zhǔn)采空區(qū)是指已經(jīng)設(shè)計(jì)規(guī)劃尚未開(kāi)采的采區(qū),新采空區(qū)是指正在開(kāi)采或停采時(shí)間少于一年的采空區(qū),而老采空區(qū)是指已停止開(kāi)采且停采時(shí)間超過(guò)一年的采空區(qū)。不同采空區(qū)由于開(kāi)采時(shí)間不同,所引起的地表移動(dòng)變形程度也不同。老采空區(qū)由于停采一段時(shí)間,地表移動(dòng)變形不活躍,趨于平穩(wěn);而準(zhǔn)采空區(qū)是由于未來(lái)采動(dòng)所形成,地表移動(dòng)變形尚未發(fā)生,未來(lái)一旦發(fā)生將十分活躍。無(wú)論是針對(duì)于哪種采空區(qū),都要考慮地表移動(dòng)變形對(duì)結(jié)構(gòu)物的影響。對(duì)于未建結(jié)構(gòu),需要充分考慮壓煤采動(dòng)對(duì)地表移動(dòng)變形影響來(lái)進(jìn)行初步設(shè)計(jì)和施工圖設(shè)計(jì);而對(duì)于已建或者新建結(jié)構(gòu),則需要考慮治理采空區(qū)或整改結(jié)構(gòu)物來(lái)使結(jié)構(gòu)物適應(yīng)壓煤采動(dòng)所引起的地表移動(dòng)變形。論文中所依托的工程銅梁到永川高速公路就是既有高速公路穿過(guò)準(zhǔn)采空區(qū),需要對(duì)既有橋梁工程進(jìn)行整改,使其適應(yīng)地表移動(dòng)變形,保證結(jié)構(gòu)安全。論文的主要研究?jī)?nèi)容如下:①基于現(xiàn)場(chǎng)調(diào)研和勘察資料,介紹銅梁到永川高速公路工程的地理位置、地形地貌、水文氣象、地質(zhì)構(gòu)造、壓煤概況與施工現(xiàn)狀;②詳細(xì)論述地表移動(dòng)變形對(duì)橋梁的影響,分析下沉、傾斜、曲率、水平移動(dòng)和水平變形對(duì)高速公路的影響,并判斷哪些指標(biāo)影響顯著。介紹地表移動(dòng)變形的預(yù)計(jì)方法——概率積分法,及其指標(biāo)控制的選取和參數(shù)的選取,并計(jì)算每個(gè)橋梁所預(yù)計(jì)的地表移動(dòng)變形結(jié)果;③采用概率積分法所預(yù)計(jì)的地表移動(dòng)變形值,運(yùn)用Midas有限元分析軟件,計(jì)算既有橋梁上部結(jié)構(gòu)受力在采動(dòng)影響下能否滿(mǎn)足規(guī)范要求,并計(jì)算橋梁下部結(jié)構(gòu)和附屬結(jié)構(gòu)能否適應(yīng)地表移動(dòng)變形,來(lái)分析原設(shè)計(jì)橋梁對(duì)未來(lái)采動(dòng)所引起地表移動(dòng)變形的適應(yīng)能力;④根據(jù)原橋梁適應(yīng)地表移動(dòng)變形能力的分析結(jié)果,針對(duì)簡(jiǎn)支梁、連續(xù)箱梁和先簡(jiǎn)支后結(jié)構(gòu)連續(xù)T梁提出合理的整改方案,使其適應(yīng)地表移動(dòng)變形,并細(xì)化施工過(guò)程與施工工藝;⑤提出橋梁采動(dòng)位移變形監(jiān)測(cè)控制方案,對(duì)受采動(dòng)影響橋梁進(jìn)行監(jiān)控,確保運(yùn)營(yíng)安全;同時(shí),提出各個(gè)部門(mén)協(xié)作機(jī)制,加強(qiáng)部門(mén)間的協(xié)作。
[Abstract]:With social construction and economic development, more and more highways need to pass through goaf. When there are many reasons, the highway design route can not avoid goaf, can only pass above the goaf. After the coal seam is mined, it will cause the surface movement and deformation, will have certain influence on the expressway structure, threaten the structure safety and affect the expressway operation. According to the mining conditions of goaf, goaf can be divided into quasi goaf, new goaf and old goaf. The quasi goaf refers to the goaf which has been designed and planned, the new goaf is the goaf where the mining time is less than one year, and the old goaf is the goaf that has stopped mining and stopped mining for more than one year. Because of different mining time, the surface movement and deformation caused by different goaf are different. Because the old goaf has stopped mining for a period of time, the surface movement deformation is not active and tends to be stable, while the quasi goaf is formed because of the future mining movement, and the surface movement deformation has not occurred yet, once it occurs in the future, it will be very active. No matter which kind of goaf, the influence of surface movement and deformation on structure should be considered. For the unbuilt structure, it is necessary to fully consider the influence of coal mining on the surface movement and deformation to carry out preliminary design and construction drawing design, while for the constructed or newly built structure, Therefore, it is necessary to treat the goaf or to modify the structure to adapt to the surface movement deformation caused by coal mining. The project from Tongliang to Yongchuan Expressway in this paper is to pass through the quasi goaf of the existing expressway. It is necessary to rectify the existing bridge engineering to adapt to the surface movement and deformation and to ensure the safety of the structure. The main contents of this paper are as follows: 1. Based on the field investigation and survey data, this paper introduces the location, topography, hydrometeorology, geological structure, coal compaction and construction status of Tongliang to Yongchuan expressway project. (2) the influence of ground movement and deformation on the bridge is discussed in detail, and the influence of subsidence, inclination, curvature, horizontal movement and horizontal deformation on the expressway is analyzed, and which indexes are judged significantly. This paper introduces the prediction method of surface movement and deformation-probabilistic integral method, the selection of index control and parameter selection, and calculates the predicted surface movement deformation result of each bridge by using probabilistic integral method. The finite element analysis software Midas is used to calculate whether the superstructure of the existing bridge can meet the requirements of the code under the influence of mining, and whether the substructure and subsidiary structure of the bridge can adapt to the ground movement and deformation. To analyze the adaptability of the original designed bridge to the ground movement and deformation caused by the mining movement in the future. According to the analysis results of the original bridge adapting to the surface movement and deformation, the simply supported beam is aimed at. The continuous box girder and the continuous T beam with simple support and then structure are put forward a reasonable rectification scheme to adapt to the ground surface movement and deformation, and the monitoring and control scheme of bridge mining displacement deformation is put forward by refining the construction process and construction technology. Monitoring the bridges affected by mining to ensure the safety of operation, at the same time, put forward the coordination mechanism of various departments to strengthen the cooperation between departments.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U445

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本文編號(hào)：1952893