广州新电视塔袖阀管双液注浆砂层地基加固技术
  • 作者: 李敏健 邵 泉 胡志桥等
论文摘要
[摘要] 广州新电视塔地下室车道砂层透水性差,在土方开挖中遇到流砂、涌水等现象。经注浆技术比较,选用袖阀管双液化学注浆法对土体进行固化止水。分析了砂土中所注浆液的配合比和注浆压力,对注浆施工流程、机械选用、钻孔布置及钻孔、浆液配制、下管和注浆施工等问题进行详细介绍,对注浆过程注意事项进行探讨。经加固的土体能满足施工要求,坍塌、涌水现象得到控制,地基固化土抗压强度达到10~24MPa。
[关键词] 广州新电视塔; 地基处理; 袖阀管; 双液化学注浆; 砂土; 固化
 
Construction Technology of Sand Foundation Reinforcement with Sleeve Valve
Pipe Double Liquid Grouting of Guangzhou New TV Tower

Abstract:Sand layers under basement lane of Guangzhou New TV Tower have poor permeability, and quicksand and water gush during excavation. After researching different grouting technologies, chemical double liquid grouting with sleeve valve pipe method is selected to solidify the foundation. Mix proportion and grouting pressure of slurry for sand layers are analyzed. Problems during construction are introduced in detail such as construction process, equipments selection, holes arrangement and forming, slurry making and grouting. At the same time, points for attention are discussed. By the reinforcement measures, the soil properties can reach construction requirements, quicksand and water gushing are controlled, and compressive strength of foundation soil is improved to 10~24MPa.
Key words:Guangzhou New TV Tower; foundation treatment; sleeve valve pipe;  chemical double  liquid grouting; sand soil; solidification
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