ATS电站厂房锚喷支护加固高边坡研究

Study on Anchor Spray Support to Reinforce High-slope of ATS Power Plant

ATS水电站厂址区岸坡自然坡度5°-45°,岩层走向与边坡近平行,基岩主要为泥质砂岩,节理烈隙发育。地形、地质条件和地面厂房的布置,使得厂房后部开挖时形成约90m的高陡边坡。高边坡失稳滑坡、崩塌等将威胁厂房的安全。根据地勘资料和边坡稳定计算,借鉴类似边坡支护措施,采用锚喷支护加固高边坡。岩质边坡设计从锚固出发,力求在有效、安全和经济之间寻求最佳平衡点。另外,由于现场开挖后实际地质情况复杂多变,施工过程中对支护锚杆和锚索进行动态监测,及时调整边坡支护措施。

The natural slope is between 5° and 45° along the bank of the site of ATS power station,direction of the rock strata is nearly parallel to the slope,foundation rocks are major composed of silt sandy rock,and the joint fissures are developed. Layout of the topography,geological conditions and ground plant house made a 90 cm high and steep slope formed at backside of the plant house when excavated,losing steady of the high slope and landslip would danger the safety of the plant house. In accordance with investigated data and slope stability calculation, drawing on the experience of supportive measures similar with the slope,anchor spray supporting was used to reinforce the high slope. Based on anchoring,the rock slope design strived to look for the optimal balance point between effect,safety and economy. In addition,actual geology conditions are complex and changeable due to excavation on site,dynamic monitoring needs to be done for supporting anchor bolt and anchor during the process of construction and to regulate supportive measures of the slope in time.