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Fluid soil for construction backfilling of cast-in-situ bored pile in karst area
The invention relates to the technical field of cast-in-situ bored pile engineering, in particular to fluid soil for construction backfilling of cast-in-situ bored piles in karst areas, which comprises the following components in percentage by mass: 40-70% of dry soil, 16-63% of water, 3-25% of cement, 0.6-4.5% of anhydrous sodium sulphate and 0.6-3.2% of water reducing agent. Different amounts of dry soil, water, cement, anhydrous sodium sulphate and a water reducing agent are mixed to prepare the fluid soil suitable for construction backfilling of the cast-in-situ bored pile in the karst area, the dry soil, the water and the cement are main substances, and sodium sulfate can refine early capillary pores of set cement and also can improve the early strength of the set cement; the water reducing agent has a dispersion effect on cement particles, and can improve the workability of the cement particles and improve the flowability of a concrete mixture. The method is applied to construction backfilling of the cast-in-situ bored pile in the karst area, and the problems that in the construction process of the cast-in-situ bored pile in the karst area, mortar leakage is prone to occurring, and the pile side friction resistance is not easy to estimate when traditional discrete materials such as rubbles and clay are adopted for backfilling of a karst cave section can be solved.
本发明涉及钻孔灌注桩工程技术领域，特别是一种用于岩溶地区钻孔灌注桩施工回填的流态土，以质量百分数计，含有以下成分：干土40~70%、水16~63%、水泥3~25%、元明粉0.6~4.5%、减水剂0.6~3.2%。通过不同量的干土、水、水泥、元明粉和减水剂的混合，制备得到适用于岩溶地区钻孔灌注桩施工回填的流态土，其中干土、水和水泥为主要物质，硫酸钠既能够细化水泥石早期的毛细孔，还能够提高水泥石的早期强度；减水剂对水泥颗粒有分散作用，能改善其工作性，改善混凝土拌合物的流动性。应用于岩溶地区钻孔灌注桩施工回填，可以解决岩溶地区钻孔灌注桩施工过程中溶洞段采用片石+黏土等传统散体材料回填存在的易漏浆和桩侧摩阻力不易估计的问题。
Fluid soil for construction backfilling of cast-in-situ bored pile in karst area
The invention relates to the technical field of cast-in-situ bored pile engineering, in particular to fluid soil for construction backfilling of cast-in-situ bored piles in karst areas, which comprises the following components in percentage by mass: 40-70% of dry soil, 16-63% of water, 3-25% of cement, 0.6-4.5% of anhydrous sodium sulphate and 0.6-3.2% of water reducing agent. Different amounts of dry soil, water, cement, anhydrous sodium sulphate and a water reducing agent are mixed to prepare the fluid soil suitable for construction backfilling of the cast-in-situ bored pile in the karst area, the dry soil, the water and the cement are main substances, and sodium sulfate can refine early capillary pores of set cement and also can improve the early strength of the set cement; the water reducing agent has a dispersion effect on cement particles, and can improve the workability of the cement particles and improve the flowability of a concrete mixture. The method is applied to construction backfilling of the cast-in-situ bored pile in the karst area, and the problems that in the construction process of the cast-in-situ bored pile in the karst area, mortar leakage is prone to occurring, and the pile side friction resistance is not easy to estimate when traditional discrete materials such as rubbles and clay are adopted for backfilling of a karst cave section can be solved.
本发明涉及钻孔灌注桩工程技术领域，特别是一种用于岩溶地区钻孔灌注桩施工回填的流态土，以质量百分数计，含有以下成分：干土40~70%、水16~63%、水泥3~25%、元明粉0.6~4.5%、减水剂0.6~3.2%。通过不同量的干土、水、水泥、元明粉和减水剂的混合，制备得到适用于岩溶地区钻孔灌注桩施工回填的流态土，其中干土、水和水泥为主要物质，硫酸钠既能够细化水泥石早期的毛细孔，还能够提高水泥石的早期强度；减水剂对水泥颗粒有分散作用，能改善其工作性，改善混凝土拌合物的流动性。应用于岩溶地区钻孔灌注桩施工回填，可以解决岩溶地区钻孔灌注桩施工过程中溶洞段采用片石+黏土等传统散体材料回填存在的易漏浆和桩侧摩阻力不易估计的问题。
Fluid soil for construction backfilling of cast-in-situ bored pile in karst area
一种用于岩溶地区钻孔灌注桩施工回填的流态土
ZHENG KEXI (author) / HE TINGQUAN (author) / LI XU (author) / LUO QI (author) / DANG SIYU (author) / LOU MENGLEI (author) / LI HAISHAN (author) / MO YUNFEI (author) / XIONG JINGSONG (author) / LI BING (author)
2024-07-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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