石灰稳定土基层路拌法施工施工方案.doc

石灰稳定土基层路拌法施工

    1、材料要求
     土、灰除满足规范要求外，施工中控制点为：
（1） 石灰应符合Ⅲ级以上标准，石灰在使用前10天充分消解
     并过筛（10MM筛孔）；                                               
（2）消石灰存放时间宜控制在2个月以内；
（3）一个作业段内采用土质相同的土（击实标准和灰剂量相同），
     以便对压实度进行准确控制。
    2、准备下承层
    （1）石灰土施工前，应对路槽进行严格验收，验收内容除包括压实度、弯沉、宽度、标高、横坡度、平整度等项目外，还必须进行碾压检验，即在各项指标都合格的路槽上，用18-21T压路机连续碾压2遍，碾压过程中，若发现土过干、表层松散，应适当洒水继续碾压；如土过湿、发生翻浆、软弹现象，应采用挖开晾晒、换土、外掺剂等措施处理。路基必须达到表面平整、坚实，没有松散和软弱点，边沿顺直，路肩平整、整齐。
    （2）按要求设置路面施工控制桩。
   3、备土、铺土
    用于石灰土的土必须符合规范要求，不含树皮、草根等杂物。备土前要用土培好路肩，路肩应同结构层等厚。
    备、铺土分两种方法：
    （1）用汽车直接堆方备土
    按照每平米的松土用量及每车的运土量，用石灰粉标出每车的卸土位置（划出方格），直接整齐地卸土于路槽上。但须注意备土时纵向必须成行，每车的运土量要基本准确，同一作业段内土质基本均匀一致。该方法有利于机械化施工，但备土数量不易准确控制。铺土时，先用推土机大致推土，然后放样用平地机整平，清余补缺，保证厚度一致，表面平整。
   （2）码条备土
    用拖拉机等小型机械备土可采用此方法
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