【摘要】：我國位于世界兩大地震帶——環(huán)太平洋地震帶與歐亞地震帶之間，地震發(fā)生頻率高，往往造成崩塌、滑坡、泥石流、滾石、開裂等地質(zhì)災(zāi)害，對震區(qū)公路的正常運(yùn)營造成嚴(yán)重影響，經(jīng)濟(jì)損失巨大。 針對汶川地震公路邊坡的破壞狀況，本文在國內(nèi)外相關(guān)資料調(diào)研和工程調(diào)查基礎(chǔ)上，開展了如下工作： （1）通過對我國地震環(huán)境和地震歷史狀況進(jìn)行調(diào)研，分析了地震造成的主要破壞特點(diǎn)以及西部地區(qū)公路邊坡地震安全性狀況。 （2）通過對汶川地震引起的周邊地區(qū)邊坡破壞狀況及其特點(diǎn)的調(diào)查，，研究了余震導(dǎo)致的邊坡破壞特征。 （3）對汶川地震后震區(qū)公路邊坡穩(wěn)定性及地質(zhì)狀況進(jìn)行了調(diào)查研究，其中包括邊坡所處區(qū)的地貌單元，地層結(jié)構(gòu)，巖性特征，巖體風(fēng)化程度，工程地質(zhì)巖組，地質(zhì)構(gòu)造特征，邊坡裂隙、節(jié)理、斷層等結(jié)構(gòu)面，以及邊坡巖體破碎程度等，統(tǒng)計(jì)分析了地震引起的邊坡破壞與地震參數(shù)間的關(guān)系。 （4）在工程調(diào)查與資料分析的基礎(chǔ)上，研究了影響公路邊坡穩(wěn)定性的主要因素，以及公路邊坡的地震破壞機(jī)理。 （5）對西部地區(qū)不同地震烈度帶及地形環(huán)境公路邊坡抗震設(shè)計(jì)技術(shù)、標(biāo)準(zhǔn)進(jìn)行了探討，研究了西部地區(qū)邊坡抗震設(shè)計(jì)參數(shù)的選取方法，提出了公路邊坡的防災(zāi)減災(zāi)對策。 （6）采用擬靜力法和本文方法，分析了典型公路高邊坡抗震穩(wěn)定性狀況，其中本文方法考慮地震力偏角的變化。根據(jù)穩(wěn)定性評價結(jié)果，基于公路邊坡抗震防范對策，提出了典型公路邊坡具體抗震加固措施。
[Abstract]:China is located between the two major seismic zones in the world-the Pacific Rim seismic belt and the Eurasian seismic belt. The frequency of earthquakes is high, which often results in geological disasters such as collapse, landslide, debris flow, rolling stone, cracking and so on. The normal operation of highway in earthquake area is seriously affected and the economic loss is huge. In view of the damage situation of Wenchuan earthquake highway slope, this paper carries out the following work on the basis of domestic and foreign related data and engineering investigation: (1) through the investigation of earthquake environment and earthquake history in China, The main damage characteristics caused by the earthquake and the seismic safety of highway slope in the western region are analyzed. (2) through the investigation of the slope failure situation and its characteristics in the surrounding areas caused by the Wenchuan earthquake, The characteristics of slope failure caused by aftershocks are studied. (3) the stability and geological condition of highway slope in Wenchuan earthquake area are investigated, including the geomorphological unit, stratigraphic structure and lithologic characteristics of the slope. Weathering degree of rock mass, engineering geological rock formation, geological structure characteristics, slope fissures, joints, faults and other structural planes, as well as the degree of rock mass fragmentation, etc. The relationship between earthquake induced slope failure and seismic parameters is analyzed statistically. (4) on the basis of engineering investigation and data analysis, the main factors affecting the stability of highway slope are studied. And the seismic failure mechanism of highway slope. (5) the seismic design technology of highway slope in different seismic intensity zones and topographic environment in western China is discussed, and the selection method of seismic design parameters for slope in western region is studied. The countermeasures for disaster prevention and mitigation of highway slope are put forward. (6) the seismic stability of typical highway high slope is analyzed by using pseudo-static method and this method, in which the variation of seismic force deflection angle is considered in this method. According to the results of stability evaluation, based on the anti-seismic countermeasures of highway slope, the concrete anti-seismic reinforcement measures of typical highway slope are put forward.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.14;P315.9

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