改良土施工的時(shí)候準(zhǔn)備活動：在場地規(guī)劃上合理布置石灰或水泥集中堆放場地；消解作業(yè)場地和過篩設(shè)施要合理布置，遵循先消解先使用原則；做好進(jìn)場石灰進(jìn)場試驗(yàn)，確保進(jìn)場材料合格。

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.

改良土用到的技術(shù)要求：全面開工前，根據(jù)工程土類性質(zhì)和填料性質(zhì)、壓實(shí)機(jī)械條件，分別選擇一定長度的試驗(yàn)區(qū)段進(jìn)行路基填筑試驗(yàn)，以選定與路基填筑、壓實(shí)、檢測有關(guān)的工藝參數(shù)；改良土配合比等施工工藝參數(shù)；確定新的快速試驗(yàn)檢測辦法與已規(guī)定的基本試驗(yàn)檢測之間的相互關(guān)系等，驗(yàn)證和優(yōu)化路基填筑施工作業(yè)指導(dǎo)書，確定施工工藝參數(shù)。

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.

試驗(yàn)段的目的是為取得施工經(jīng)驗(yàn)及相關(guān)參數(shù)，檢驗(yàn)施工機(jī)械組合，根據(jù)壓實(shí)機(jī)械和路堤不同部位的壓實(shí)標(biāo)準(zhǔn)來確定松鋪厚度、混合料土的最佳含水量、達(dá)到設(shè)計(jì)要求密實(shí)度的碾壓遍數(shù)等，以確定最佳的組合方案。將以上資料整理上報(bào)監(jiān)理工程師批準(zhǔn)后，指導(dǎo)此項(xiàng)工程的路基施工。還有就是要熟悉設(shè)計(jì)圖紙及規(guī)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：施工準(zhǔn)備→填筑試驗(yàn)段→確定工藝→驗(yàn)收下承層→測量放樣→集中拌和→運(yùn)輸→填土→攤鋪平整→碾壓→養(yǎng)生→檢驗(yàn)驗(yàn)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：采用穩(wěn)定土拌和設(shè)備在拌和廠集中進(jìn)行拌和，同時(shí)配備碎土設(shè)備消除土壤中的土塊。在拌和設(shè)備內(nèi)拌制改良土混合料時(shí)，應(yīng)拌和均勻，混合料中不應(yīng)含有大于10mm的土塊和未消解石灰顆粒；并使混合料的組成和含水率（要根據(jù)天氣情況調(diào)整拌和時(shí)的含水率與碾壓時(shí)最佳含水率的關(guān)系）達(dá)到規(guī)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.

當(dāng)混合料接近最佳含水率時(shí)，用重型壓路機(jī)在路基全寬內(nèi)碾壓至要求的壓實(shí)密度，碾壓完成后表面應(yīng)無明顯的碾壓輪痕跡。碾壓時(shí)，各區(qū)段交接處應(yīng)相互重疊壓實(shí)，縱向搭接長度不小于2.0m，縱向行與行之間的輪跡重疊不小于40cm，上下兩層填筑接頭應(yīng)錯(cuò)開不小于3.0m。兩作業(yè)區(qū)段之間的銜接處縱向搭接拌和長度不小于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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