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桂 (林 )—北 (海 )高速公路沿途主要为低山和陡坡丘陵区 ,高边坡、陡边坡隐患较多。地质灾害以崩塌、边坡蠕动、滑坡及路基下陷为主。致灾的内在因素是沿途出露的泥盆系至下二叠统中—薄层页岩、泥岩及砂岩风化较强烈 ,构造裂隙发育 ;外在因素为大量的连续降雨及人工切坡 ,改变了边坡岩石和土体的受力状态 ,使高边坡失稳。主要防治措施为 :(1)对坡角 >35°的斜坡挡土墙进行全面检查 ,薄弱处加固 ;(2 )在已产生蠕动、滑坡的地段采取科学、合理的措施治理。如采用预应力锚索 (杆 )、锚固工程治理边坡 ,用高压施喷、化学灌浆加固处理路面下沉等。对不同的岩土工程条件 ,采用不同的治理措施。
Gui Lin (Lin) - North (sea) highway along the main low hill and steep slope hilly areas, high slope, steep slope hidden more. Geological hazards to collapse, slope creep, landslide and subsidence of the main roadbed. The intrinsic factor of the disaster is that middle Devonian-Lower Permian-thin shale, mudstone and sandstone exposed along the route have strong weathering and tectonic fissures. The external factors are a lot of continuous rainfall and artificial cutting, The slope rock and soil stress state, so that the high slope instability. The main control measures are as follows: (1) A comprehensive inspection of slope retaining walls with a slope angle> 35 ° shall be conducted to reinforce the weak points; (2) Scientific and reasonable measures shall be taken to control the areas where creep and landslides have occurred. Such as the use of prestressed anchor (rod), anchoring engineering slope control, spraying with high pressure, chemical grouting reinforcement pavement sinking. Different geotechnical conditions, using different control measures.