【摘要】：京津高鐵是中國第一條高速運(yùn)行的城際鐵路,其安全運(yùn)行對軌道的平順性有著嚴(yán)格的要求。地面沉降,尤其是不均勻地面沉降會引起部分路基和橋梁變形,威脅著高速鐵路的運(yùn)營安全。合成孔徑雷達(dá)干涉測量技術(shù)可以大范圍監(jiān)測地表形變,對高速鐵路沿線地面沉降具有較好的監(jiān)測能力。本文以45景高分辨率Terra SAR-X數(shù)據(jù)為基礎(chǔ),采用PS-In SAR技術(shù)監(jiān)測京津高鐵北京段沿線地面沉降,獲取京津高鐵北京段沿線地面沉降的分布信息,從動靜載荷視角結(jié)合北京地區(qū)地下水、斷裂帶、地質(zhì)條件和含水層系統(tǒng)介質(zhì)等數(shù)據(jù),綜合分析高鐵沿線不均勻地面沉降的原因,為京津高鐵的安全運(yùn)營提供技術(shù)支撐。研究結(jié)果表明:京津高鐵北京段沿線地面沉降發(fā)展在空間上存在一定差異性,北京南站至十里河區(qū)間,年沉降速率小于10 mm/a;至十八里店區(qū)間,年沉降速率在10~40 mm/a范圍內(nèi)浮動;過亦莊站至東石村以東區(qū)間,最大年沉降速率達(dá)到90 mm/a;至永隆村以西,年沉降有所緩解,往東至坨堤村,沉降較為穩(wěn)定,年沉降速率小于10 mm/a。地下水超采是沿線區(qū)域地面沉降的主要因素,動靜載荷共同作用下對地面沉降產(chǎn)生一定的影響,沿線地面沉降一定程度上受到南苑—通縣斷裂帶和舊宮斷裂帶構(gòu)造控制,沉降量較大的路段位于粘土層較厚的大興迭隆起。
[Abstract]:Beijing-Tianjin high-speed railway is the first high-speed intercity railway in China. Land subsidence, especially uneven land subsidence, will cause deformation of some subgrade and bridge, threatening the operation safety of high-speed railway. Synthetic Aperture Radar (SAR) interferometry can be used to monitor the surface deformation in a wide range and has a good ability to monitor the land subsidence along the high-speed railway. Based on 45 high resolution Terra SAR-X data, the ground subsidence along Beijing section of Beijing-Tianjin high-speed railway is monitored by PS-In SAR technology, and the distribution information of ground subsidence along Beijing section of Beijing-Tianjin high-speed railway is obtained. In order to provide technical support for the safe operation of Beijing-Tianjin high-speed railway, the data of fault zone, geological conditions and aquifer system media are analyzed synthetically to analyze the causes of uneven land subsidence along the high-speed rail line. The results show that the land subsidence development along the Beijing section of Beijing-Tianjin high-speed railway is different in space, the annual subsidence rate is less than 10 mm / a from Beijing South Railway Station to the Shili River section, and the annual settlement rate fluctuates in the range of 10 ~ 40 mm/a to Shilidian section. To the east of Dongshi Village, the maximum annual subsidence rate is 90 mm / a, and to the west of Yonglong Village, the annual settlement is alleviated, and to the east to Tuo Dike Village, the settlement is relatively stable, and the annual settlement rate is less than 10 mm / a. Groundwater overmining is the main factor of ground subsidence along the line, and the ground subsidence along the line is controlled to some extent by the structures of the Nanyuan-Tongxian fault zone and the old palace fault zone under the combined action of dynamic and dynamic loads, and the ground subsidence along the line is controlled to a certain extent by the structure of the Nanyuan-Tongxian fault zone. The section with large settlement is located in Daxing uplift with thick clay layer.
【作者單位】： 首都師范大學(xué)水資源安全北京實(shí)驗(yàn)室;首都師范大學(xué)三維信息獲取與應(yīng)用教育部重點(diǎn)實(shí)驗(yàn)室;首都師范大學(xué)城市環(huán)境過程與數(shù)字模擬國家重點(diǎn)實(shí)驗(yàn)室培育基地;
【基金】：國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2017YFB0503803) 國家自然科學(xué)基金項(xiàng)目(41201419、41671417)
【分類號】：P642.26;U238

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