随着我国经济建设的高速发展,高层建筑、大型厂房、港口码头、水库坝基、公路桥梁及高速铁路等工程嵌岩灌注桩数量大幅度增加,这些灌注桩孔直径一般都较大,嵌岩深度较深,多数要求嵌入新鲜基岩面一定深度,以确保基桩的承载力和抵御自然灾害的能力。 With the rapid economic development in our country, the number of rock-socketed bored piles in high-rise buildings, large-scale factories, port terminals, reservoir dam foundations, highway bridges and high-speed railways have increased greatly. The bored pile diameters are generally large, Deep, most require the depth of embedding fresh bedrock surface to ensure the bearing capacity of foundation piles and the ability to resist natural disasters.