改良土施工的时候准备活动：在场地规划上合理布置石灰或水泥集中堆放场地；消解作业场地和过筛设施要合理布置，遵循先消解先使用原则；做好进场石灰进场试验，确保进场材料合格。

Preparation activities for soil improvement construction: Reasonably arrange lime or cement storage areas in site planning; The disposal site and screening facilities should be arranged reasonably, following the principle of disposal first, use first; Conduct a lime entry test to ensure that the incoming materials are qualified.

改良土用到的技术要求：全面开工前，根据工程土类性质和填料性质、压实机械条件，分别选择一定长度的试验区段进行路基填筑试验，以选定与路基填筑、压实、检测有关的工艺参数；改良土配合比等施工工艺参数；确定新的快速试验检测办法与已规定的基本试验检测之间的相互关系等，验证和优化路基填筑施工作业指导书，确定施工工艺参数。

Technical requirements for improving soil: Before the comprehensive commencement of construction, a certain length of test section should be selected for roadbed filling tests based on the properties of the engineering soil and filling materials, as well as the compaction machinery conditions, to select the process parameters related to roadbed filling, compaction, and testing; Improved soil mix ratio and other construction process parameters; Determine the interrelationship between the new rapid testing method and the prescribed basic testing method, verify and optimize the construction operation manual for roadbed filling, and determine the construction process parameters.

试验段的目的是为取得施工经验及相关参数，检验施工机械组合，根据压实机械和路堤不同部位的压实标准来确定松铺厚度、混合料土的最佳含水量、达到设计要求密实度的碾压遍数等，以确定最佳的组合方案。将以上资料整理上报监理工程师批准后，指导此项工程的路基施工。还有就是要熟悉设计图纸及规范要求。

The purpose of the experimental section is to obtain construction experience and relevant parameters, test the combination of construction machinery, determine the thickness of loose paving, the optimal moisture content of the mixed soil, and the number of rolling passes to achieve the design required compactness based on the compaction standards of different parts of the compaction machinery and embankment, in order to determine the optimal combination scheme. After organizing and submitting the above information to the supervising engineer for approval, guide the roadbed construction of this project. Also, it is necessary to be familiar with the design drawings and specification requirements.

改良土施工的程序：施工准备→填筑试验段→确定工艺→验收下承层→测量放样→集中拌和→运输→填土→摊铺平整→碾压→养生→检验验收

The procedure for improving soil construction: construction preparation → filling test section → determination of process → acceptance of sub layer → measurement and layout → centralized mixing → transportation → filling → paving and leveling → compaction → curing → inspection and acceptance

改良土混合料：采用稳定土拌和设备在拌和厂集中进行拌和，同时配备碎土设备消除土壤中的土块。在拌和设备内拌制改良土混合料时，应拌和均匀，混合料中不应含有大于10mm的土块和未消解石灰颗粒；并使混合料的组成和含水率（要根据天气情况调整拌和时的含水率与碾压时最佳含水率的关系）达到规定的要求。

Improved soil mixture: Stable soil mixing equipment is used for centralized mixing in the mixing plant, and soil crushing equipment is equipped to eliminate soil lumps in the soil. When mixing improved soil mixture in the mixing equipment, it should be mixed evenly, and the mixture should not contain soil blocks larger than 10mm and undissolved lime particles; And ensure that the composition and moisture content of the mixture (the relationship between the moisture content during mixing and the optimal moisture content during rolling should be adjusted according to weather conditions) meet the specified requirements.

当混合料接近最佳含水率时，用重型压路机在路基全宽内碾压至要求的压实密度，碾压完成后表面应无明显的碾压轮痕迹。碾压时，各区段交接处应相互重叠压实，纵向搭接长度不小于2.0m，纵向行与行之间的轮迹重叠不小于40cm，上下两层填筑接头应错开不小于3.0m。两作业区段之间的衔接处纵向搭接拌和长度不小于2.0m。

When the mixture approaches the optimal moisture content, use a heavy-duty roller to compact the entire width of the roadbed to the required compaction density. After compaction, there should be no obvious roller marks on the surface. When rolling, the junctions of each section should overlap and compact with each other, with a longitudinal overlap length of not less than 2.0m. The overlap of wheel tracks between longitudinal rows should not be less than 40cm. The joints between the upper and lower layers of filling should be staggered by not less than 3.0m. The longitudinal overlap mixing length at the junction between two operating sections should not be less than 2.0m.

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