【摘要】：高速鐵路運(yùn)營(yíng)帶來的環(huán)境影響主要包括振動(dòng)污染、噪聲污染和電磁輻射。其中振動(dòng)污染已被認(rèn)定為七大環(huán)境公害之一,成為人們的關(guān)注重點(diǎn)。城際鐵路的修建是為滿足區(qū)域內(nèi)城市間的高密度人群的流動(dòng),其線路走向不可避免的需要穿過人群密集處,因而其帶來的環(huán)境振動(dòng)污染更值得關(guān)注。本文在深入學(xué)習(xí)國(guó)內(nèi)外鐵路交通系統(tǒng)環(huán)境振動(dòng)研究資料的基礎(chǔ)上,對(duì)成灌快鐵橋梁區(qū)段地面環(huán)境振動(dòng)進(jìn)行現(xiàn)場(chǎng)實(shí)測(cè),探究成灌快鐵橋梁區(qū)段的環(huán)境振動(dòng)特性。對(duì)成灌快鐵位于平康村的橋梁區(qū)段A測(cè)點(diǎn)(K31+795)進(jìn)行地面環(huán)境振動(dòng)實(shí)測(cè),分析其振動(dòng)衰減規(guī)律,并擬合衰減公式。再對(duì)平康村橋梁區(qū)段B測(cè)點(diǎn)(K31+745)和路橋過渡段C測(cè)點(diǎn)(K31+700)進(jìn)行對(duì)比測(cè)試,分析不同線路形式對(duì)地面環(huán)境振動(dòng)的影響。通過本文的研究得出以下結(jié)論：1.當(dāng)線路形式、地質(zhì)條件、車輛條件等因素相同時(shí),列車行駛速度成為影響環(huán)境振動(dòng)強(qiáng)度的主要因素。列車行駛速度越快,造成的環(huán)境振動(dòng)強(qiáng)度越大,且高頻振動(dòng)成分越多。2.當(dāng)?shù)孛鏃l件不變時(shí),隨距線路中心線距離的增加,地面環(huán)境振動(dòng)強(qiáng)度不斷衰減。通過Z振級(jí)擬合得到成灌快鐵橋梁區(qū)段環(huán)境振動(dòng)衰減公式,呈指數(shù)形式。隨距離增加,振動(dòng)主頻范圍不斷變窄,近場(chǎng)范圍以高頻為主,但高頻衰減快,遠(yuǎn)場(chǎng)范圍低頻成分比例增大,以15-30Hz的中低頻為主。當(dāng)?shù)孛鏃l件變化時(shí),隨著距線路中心線距離的增加,地面環(huán)境振動(dòng)強(qiáng)度出現(xiàn)反彈衰減現(xiàn)象。3.當(dāng)列車通過橋梁區(qū)段和路橋過渡段時(shí),在路橋過渡段形成的地面環(huán)境振動(dòng)強(qiáng)度明顯高于橋梁區(qū)段,因而認(rèn)為橋梁形式的應(yīng)用對(duì)于減少鐵路系統(tǒng)造成的環(huán)境振動(dòng)更加有利。
[Abstract]:The environmental impact of high-speed railway operation mainly includes vibration pollution, noise pollution and electromagnetic radiation. Vibration pollution has been recognized as one of the seven major environmental hazards, which has become the focus of people's attention. The construction of inter-city railway is to meet the flow of high-density crowd between cities in the region, and its route direction inevitably needs to pass through the crowded area. Therefore, the environmental vibration pollution caused by the inter-city railway is worth paying more attention to. On the basis of studying the research data of environmental vibration of railway transportation system at home and abroad, in this paper, the field measurement of the ground environmental vibration of the bridge section of the irrigated fast railway is carried out, and the environmental vibration characteristics of the section of the bridge of the irrigated fast railway are explored. In this paper, the ground environmental vibration of the bridge section A (K31 795) of the irrigated fast railway in Pingkang Village is measured, and the attenuation law of the vibration is analyzed and the attenuation formula is fitted. Then, the B measurement point (K31 745) of Pingkang village bridge section and the C test point of road bridge transition section (K31 700) are compared and tested, and the influence of different line forms on the ground environmental vibration is analyzed. Through the research in this paper, the following conclusions are drawn: 1. When the lines, geological conditions, vehicle conditions and other factors are the same, the train speed becomes the main factor affecting the environmental vibration intensity. The higher the train speed, the greater the environmental vibration intensity and the more high frequency vibration components. 2. When the ground condition is constant, the vibration intensity of the ground environment decreases with the increase of the distance from the center line of the line. The formula of environmental vibration attenuation is obtained by Z-level fitting, which is in the form of exponential form. With the increase of distance, the main frequency range of vibration becomes narrower, the near-field range is dominated by high frequency, but the high-frequency attenuation is fast, and the proportion of low-frequency components in the far-field range increases, mainly in the medium-low frequency of 15-30Hz. When the ground conditions change, with the increase of distance from the center line of the line, the vibration intensity of the ground environment appears rebound attenuation phenomenon. 3. When the train passes through the bridge section and the road-bridge transition section, the ground environmental vibration intensity formed in the road-bridge transition section is obviously higher than that in the bridge section. Therefore, the application of the bridge form is more favorable for reducing the environmental vibration caused by the railway system.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441.3

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本文編號(hào)：2446689