土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (6): 896-898.

• 工程实录 • 上一篇    下一篇

泡沫混凝土在临河桩基溶洞中的应用实践

舒智华，王定军   

  1. (中建国际工程有限公司，合肥 230601）  
  • 收稿日期:2023-03-06 修回日期:2023-03-13 出版日期:2024-12-31 发布日期:2024-12-20
  • 作者简介:舒智华（1986-），男，高级工程师，研究方向为岩土工程、综合交通枢纽、桥梁结构等。

Application of Foamed Concrete in Karst Rock Cavity at the Riverside Pile Foundation

SHU Zhihua， WANG Dingjun   

  1. (Zhongjian International Engineering Co. Ltd., Hefei 230601)
  • Received:2023-03-06 Revised:2023-03-13 Online:2024-12-31 Published:2024-12-20

摘要： 临河浅埋桩基岩溶地质条件复杂，埋深较浅、岩溶错综交织，桩基施工前进行详细的地勘，并进行水下轻质泡沫混凝土的技术研究，生产采用泡沫与水泥砂浆充分搅拌混和的内部含有气泡的轻质泡沫混凝土。运用工程钻机进行引孔至岩溶底部并埋设泡沫混凝土灌注管，通过灌注管灌注水下轻质泡沫混凝土，有效指导了桩基溶洞的顺利填充。在填充前，利用勘测技术对桩基溶洞位置进行一桩一孔施工勘察确定深度、大小。施工中泡沫混凝土良好的流动性、填充自密实性、提前稳定溶洞，提升施工效率，减少了每根溶洞桩基施工时间。

关键词: 岩溶, 临河浅埋桩基, 水下泡沫混凝土, 技术研究, 液压潜孔钻

Abstract: The karst geological conditions of a shallowly buried pile foundation at the riverside are complicated, and the karst rock cavities are well developed. Before the pile installation, a detailed geological and geotechnical investigations are performed, and the technical research of underwater lightweight foamed concrete is also carried out. The lightweight foamed concrete is produced by the fully mixing foam agent and the cement mortar. Finally, an engineering drill is used to set up the pilot hole to the bottom of the karst rock cavity. The foamed concrete pouring pipe is buried and the underwater lightweight foamed concrete is poured through the this buried pipe.

Key words: Karst, Shallow Embedded Pile Foundation at Riverside, Underwater Foamed Concrete, Technical Research, Hydraulic Down Hole Drilling

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