【摘要】 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。更多还原

【Abstract】 There are many low mountains and hills along Guilin\|Beihai expressway and more hidden dangerous high slopes and abrupt slopes.The main geological hazards are collapse,slope creep,landslide and roadbed subsidence.Owing to more intensive weathering of rocks and developing of fissures and cracks in Devonian and lower Permian medium\|thin bedded shale,pelite and sandstone,these geological hazards are easily developed.This is the internal cause.A large number of continuous rainfalls and man\|made dissected slopes have changed the mechanical state of slope rock and soil mass have caused high slopes unstable.This is the external cause.The main control measures are:1)Slope supporting walls must be overall checked and reinforced;2)Scientific and reasonable measures must be adopted to make cure in creeping and sliding areas,for instance, rock bolting and anchoring force are applied to curing slope,high\|pressure shotcrete and bolt support and chemical grouting are applied to reinforcing road surface subsidence.On the different geotechnical engineering conditions the different prevention measures must be adopted.更多还原