摘要
针对厚覆盖砂卵石岩溶地层桩基施工,采用钢护筒进行护壁,可以有效解决在该类地层中成孔时易发生的孔壁坍塌等事故,有利于降低成本、保证工期和工程质量。实现量化评价厚覆盖砂卵石岩溶地层桩基冲孔中存在的孔壁坍塌及钢护筒下放等问题,并以此提出相对的应对策略,从而提高厚覆盖砂卵石岩溶地层桩基成孔的质量和效率,为同类工程施工积累有效的经验。
For the construction of pile foundations in thick covered sandy gravel karst formations,using steel casing for wall protection can effectively solve accidents such as hole wall collapse that are prone to occur during drilling in such formations,which is beneficial for reducing costs,ensuring construction period,and engineering quality.Realize quantitative evaluation of the problems of hole wall collapse and steel casing lowering in the punching of pile foundations in thick covered sand and gravel karst formations,and propose corresponding response strategies based on this,thereby improving the quality and efficiency of pile foundation drilling in thick covered sand and gravel karst formations,and accumulating effective experience for similar engineering construction.
作者
王明政
Wang Mingzheng(Gansu Wantai Construction Engineering Co.,Ltd.,Lanzhou,China)
出处
《科学技术创新》
2023年第23期104-107,共4页
Scientific and Technological Innovation
关键词
溶洞型桩基
钢护筒跟进法
片石+粘土回填法
注浆
karst cave type pile foundation
Steel casing follow-up method
Rubble+clay backfilling method
Grouting
