建筑施工坍塌事故时下经常发生,在建筑业施工事故发生频率中紧次于高空坠落位居第二,因此在深基坑作业前,基坑支护施工是一项很常见也很有效的预防措施。基坑支护型式常见的基坑支护型式主要有:排桩支护,桩撑、桩锚、排桩悬臂;地下连续墙支护,地连墙+支撑;水泥土挡墙;钢板桩:型钢桩横挡板支护,钢板桩支护;土钉墙(喷锚支护);逆作拱墙;放坡; It is not uncommon to find that the collapse of a building is frequent and frequent, and the number of construction accidents falls sharply in the second highest at frequent altitudes. Therefore, it is a common and effective precaution before deep foundation pit construction . The types of foundation pit support types commonly used for foundation pit support are: row pile support, pile support, pile anchor and row pile cantilever; underground continuous wall support and ground wall + support; cement soil retaining wall; steel sheet pile: Steel piles horizontal baffle support, steel sheet pile support; soil nailing wall (spray anchor support); reverse arch wall; grading;