论文部分内容阅读
岩溶地质在我国分部广、面积大,在该地质条件下桩基施工面临成孔难度大、极易常塌孔等技术难题,尤其在地下溶洞连通、多层溶洞呈串珠状分布、有流动水等复杂的岩溶地质条件下,成孔非常困难。岩溶地质条件下桩基施工击穿溶洞顶板时,还可能出现埋钻、钻机倾覆、地面塌陷等较严重的事故,对工程建设造成非常不利的影响。本文介绍了复杂岩溶地质条件下钢护筒跟进法桩基施工技术,并结合工程实例对其现场施工控制加以论述。
Karst geology is widely distributed in our country and has a large area. Under the geological conditions, pile foundation construction is faced with technical difficulties such as difficulty in forming a hole and frequent collapse of the hole, especially in underground karst caves, with multi-layered karst beaded distribution and flowing Water and other complex karst geological conditions, into the hole is very difficult. Under the condition of karst geological conditions, when pile foundation construction breaks through the roof of karst cave, more serious accidents such as burying drill, overturning of drilling rig and ground subsidence may occur, which will have a very adverse impact on the construction of the project. In this paper, the pile foundation construction technology of steel tube follow-up method under complex karst geological conditions is introduced, and the on-site construction control is discussed with engineering examples.