發(fā)布時(shí)間：2018-07-28 17:36

【摘要】：海岸滑坡和侵蝕的存在嚴(yán)重影響著管道工程的穩(wěn)定性,根據(jù)多種地球物理勘察手段的識別,查明坦桑尼亞某海灣管道路由區(qū)有海岸滑坡、海岸侵蝕、砂土液化和軟土震陷等不良地質(zhì)作用。結(jié)合地形、地層、海洋水動力條件等因素,對滑動機(jī)理進(jìn)行綜合分析;在分別考慮潮位和不考慮潮位作用下,采用極限平衡理論結(jié)合數(shù)值模擬分析進(jìn)行穩(wěn)定性評價(jià)。研究得出:海岸滑坡是第三層淤泥質(zhì)粉質(zhì)黏土層液化所導(dǎo)致的,是滑坡向海岸后退式(牽引)滑動的結(jié)果�；诨瑒釉蚪o出管道改線和防治措施,對海岸滑坡的定性評價(jià)有很好的補(bǔ)充,為海岸滑坡的整治提供了科學(xué)依據(jù)。
[Abstract]:The existence of coastal landslides and erosion seriously affected the stability of pipeline engineering. Based on the identification of various geophysical survey methods, it was found that there were coastal landslides and coastal erosion in a certain Gulf pipeline routing area in Tanzania. Sand liquefaction and soft soil seismic subsidence and other adverse geological processes. Combined with topography, stratum and marine hydrodynamic conditions, the sliding mechanism is comprehensively analyzed, and the limit equilibrium theory combined with numerical simulation analysis is used to evaluate the stability under the consideration of tidal level and without considering tidal level, respectively. The results show that the landslide is caused by the liquefaction of the third layer of silty clay, and is the result of the landslide sliding back to the coast. Based on the sliding reason, the pipeline line modification and prevention measures are given, which is a good supplement to the qualitative evaluation of coastal landslide and provides a scientific basis for the regulation of coastal landslide.
【作者單位】： 中國科學(xué)院山地災(zāi)害與地表過程重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院水利部成都山地災(zāi)害與環(huán)境研究所;中國科學(xué)院大學(xué);中國石油集團(tuán)工程設(shè)計(jì)有限責(zé)任公司西南分公司;
【基金】：中國科學(xué)院山地災(zāi)害與地表過程重點(diǎn)實(shí)驗(yàn)室、國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)(2013CB733205)資助
【分類號】：P75;P642.22
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本文編號：2151082