石灰穩定土基層路拌法施工施工方案.doc

石灰穩定土基層路拌法施工

    1、材料要求
     土、灰除滿足規范要求外，施工中控制點為：
（1） 石灰應符合Ⅲ級以上標準，石灰在使用前10天充分消解
     并過篩（10MM篩孔）；                                               
（2）消石灰存放時間宜控制在2個月以內；
（3）一個作業段內采用土質相同的土（擊實標準和灰劑量相同），
     以便對壓實度進行準確控制。
    2、準備下承層
    （1）石灰土施工前，應對路槽進行嚴格驗收，驗收內容除包括壓實度、彎沉、寬度、標高、橫坡度、平整度等項目外，還必須進行碾壓檢驗，即在各項指標都合格的路槽上，用18-21T壓路機連續碾壓2遍，碾壓過程中，若發現土過干、表層松散，應適當灑水繼續碾壓；如土過濕、發生翻漿、軟彈現象，應采用挖開晾曬、換土、外摻劑等措施處理。路基必須達到表面平整、堅實，沒有松散和軟弱點，邊沿順直，路肩平整、整齊。
    （2）按要求設置路面施工控制樁。
   3、備土、鋪土
    用于石灰土的土必須符合規范要求，不含樹皮、草根等雜物。備土前要用土培好路肩，路肩應同結構層等厚。
    備、鋪土分兩種方法：
    （1）用汽車直接堆方備土
    按照每平米的松土用量及每車的運土量，用石灰粉標出每車的卸土位置（劃出方格），直接整齊地卸土于路槽上。但須注意備土時縱向必須成行，每車的運土量要基本準確，同一作業段內土質基本均勻一致。該方法有利于機械化施工，但備土數量不易準確控制。鋪土時，先用推土機大致推土，然后放樣用平地機整平，清余補缺，保證厚度一致，表面平整。
   （2）碼條備土
    用拖拉機等小型機械備土可采用此方法
Lime Stabilized Soil Mixing grassroots Road Construction

    1, material requirements
     Soil, ash not only meet the specification requirements, construction control points are:
(1) Lime shall meet the above criteria of grade Ⅲ, lime 10 days before using the full digestion
     And sieved (10MM sieve);
(2) lime storage time should be controlled within 2 months;
(3) in paragraph a job with the same soil the soil (compaction standards and the same gray dose),
     In order to accurately control the degree of compaction.
    2, ready to lower course
    (1) Lime ago, should be strictly road tank inspection, acceptance, inter including compaction, deflection, width, elevation, cross slope, roughness and other projects, but also must be rolling test, that is, the indicators are qualified way trough, and with 18-21T roller compacted two consecutive times, rolling process, if found in soil too dry, loose surface, watering should be appropriate to continue rolling; such as soil too wet, place Boiling phenomenon, should be dug drying, changing soil, mixing agent measures to deal with. Subgrade must be smooth surface, solid, not loose and weak points, edge straight, shoulders level, neat.
    (2) The requirements set by the road construction control of pile.
   3, prepare soil, soil Shop
    Soil for lime soil must meet regulatory requirements, without bark, roots and other debris. Prepare soil well before the use of soil culture shoulders, shoulders should be the same layer thickness.
    Equipment, shop soil are two methods:
    (1) direct car pile side soil preparation
    In accordance with the amount per square meter of loose earth, and the amount of each vehicle earth, marked with lime powder and location of each car dump (draw boxes), directly on the road neatly dump tanks. It should be noted when the vertical soil preparation must take place, the amount of each vehicle to the basic accuracy of earth, the same basic work uniform soil paragraph. This method is conducive to mechanized construction, but not easy to control the number of prepared soil. Shop soil, the first broad use of bulldozers bulldozing, and then setting out with a motor grader leveling, clearing more than fill a vacancy, to ensure uniform thickness and smooth surface.
   (2) code shall prepare soil
    Tractors and other small machines can use this method of soil preparation
 

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