This study focuses on the development and assessment of an innovative anti-friction agent designed to reduce the extraction force required for H-beams in Soil Mixing Walls (SMW). The composition of the new formula for the anti-friction agent was determined using orthogonal experimental methods: vaseline (25 g), paraffin (300 g), rosin (65 g), polytetrafluoroethylene powder (9.75 g), ZDDP (10 g), benzoic acid (4 g), ammonium polyphosphate (2 g), alcohol ester-12 (1.5 g), and theaflavin (1.5 g). Performance evaluation of the new anti-friction agent is carried out through indoor model tests, on-site tests, and indoor bending experiments. The results indicate that compared to commonly used anti-wear agents in the field (Nanjing site anti-friction agent, Guangzhou site anti-wear agent), the new anti-wear agent can significantly reduce friction, by 16.4 % and 14.2 % respectively. The new material has little impact on the bending performance of composite structures before cement-soil failure, in contrast to the Nanjing anti-friction agent typically used in field applications. During on-site applications, if the H-beam coated with conventional anti-friction agent cannot be pulled out while the H-beamcoated with the new anti-friction agent can, then the cost of piles treated with the new anti-friction agent is reduced by 97 %. If both types of steel coated with anti-friction agents can be pulled out, then the cost of piles treated with the new anti-friction agent increases by 0.9 %.

中文翻译：

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土拌墙H型钢抽出新型减摩剂的研制及性能评价

本研究重点开发和评估一种创新减摩剂，旨在减少土壤混合墙 (SMW) 中 H 型梁所需的拔出力。采用正交实验方法测定了减摩剂新配方的组成：凡士林（25 g）、石蜡（300 g）、松香（65 g）、聚四氟乙烯粉末（9.75 g）、ZDDP（10 g）、苯甲酸(4克)、聚磷酸铵(2克)、醇酯12(1.5克)和茶黄素(1.5克)。通过室内模型试验、现场试验、室内弯曲实验对新型减摩剂进行性能评价。结果表明，与现场常用抗磨剂（南京现场抗磨剂、广州现场抗磨剂）相比，新型抗磨剂可显着降低摩擦，分别降低16.4%和14.2%。与现场应用中通常使用的南京减摩剂相比，这种新材料对水泥土破坏前复合结构的弯曲性能影响很小。现场使用时，如果涂有传统减摩剂的H型钢无法拔出，而涂有新型减摩剂的H型钢可以拔出，则采用新型减摩剂处理的桩成本为减少了 97%。如果两种涂有减摩剂的钢材都能拔出，那么用新型减摩剂处理的桩的成本将增加0.9%。