| The ZhaoTong-DaiBu highway in the west of YuNan province is a transmeridional important backbone of the 213 national highway, and construct things numerously in such projects as the bridge and tunnel, etc.. This high level ground of backbone-Lucky new sections of K307+715-K308+080 existence of the geological disaster (land slideis,landslip) to the construction and run have security and quality hidden danger safely of expressway. Research this thesis to bestow expressway specific geological environment as the background with ZhaoTong-DaiBu expressway K307+715-K308+080 pay house slope to come down for the concrete research object, use limit to be balanced and the FLAC3D numerical analysis value is it appraise method go on comprehensive appraisal to landslide stability to calculate, and put forward to this kind of landslide and have general prevention and cure countermeasure and measure.The geological condition is complicated on the ZhaoTong-DaiBu highway. The slope has excavated and changed the slope body already existing balance state in the side of the construction of the highway, under the influence of in ternal and external motive force factor, such as the little ground form of side slope, slip the surface with bringing the soil a characteristic slipperily, slope recent activity state, torrential rain intensity, trailing edge load situation, river function, comprehensive function of factor, activity of mankind and function, etc. of earthquake, will reduce the intensity and stability of the slope body, thus cause the slope is lost steadily. So for guarantee quality and security of highway engineering, must stability, opposite side of slope carry on full and accurate overall synthesis analyse and appraise at first, and then put forward effectual prevention and cure countermeasure and measure.The balanced law of limit is used for along time, it is a kind of more reliable method. Finite element law apply rock soil all field, project of circle extensively already too, in slope stability analyse respect, compared with traditional balanced method of numerical analysis law, there are one's own strong function and wide development prospect. Each analysis of field in the future is it have to the limited number value trend changing to calculate. Is it pay house actual conditions that slope come down to carry on numerical analysis calculate to combine, combine geological factor come down to cause quantitative datum get objective stability appraisal out of. Comparatively effective administration scheme of proposition that so as to be pointed. At present, mainly have two kinds to the prevention and cure measure of coming down both at home and abroad, one reduces the slippery project measure, and then reduoe heavily, drain off water and renovate such as loading pressing, disappearing instead: Another to is it is it prop up measure of blocking to slip to resist, such as resist slippery retaining wall, is it slip to resist, stock (ask for)strengthen and anchor is it slip one strengthen etc. to resist to ask for. This tent research contents to is it pay house characteristic that slope come down to combine, put forward reasonable effective prevention and cure way in this area is similar to geologically cases mainly, in order to is it synthesize effective side slope protect system, reduce project fabrication cost come down to renovate to form. Slope deep cutting construction question by the soft rock metin expressway to bestowing the ZhaoTong-DaiBu highway, have very important research value. Through pay house stability that slope come down to analyse and prevent and cure countermeasure and research of measure to this section, must there are extensive reference meaning and practical value to the road construction in the development of western regions. |
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