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广州南沙开发区黄阁东二路道路工程路基填筑技术交底.doc

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交底内容:
本工程的路基填筑在软基处理完成后先摊铺30cm厚碎石垫层,再铺一层40型双向土工格栅,接着铺筑20cm厚中粗砂垫层,然后进行吹填砂路基的施工,最后采用粘土进行包边和封顶。具体要求如下:
一、碎石垫层施工
软基处理工程完成经检测合格后,在其上铺30cm厚级配碎石垫层。
1. 准备工作:
(1) 铺筑前,将路床所有浮土、杂物清除干净,并严格整型和压实使其符合设计图纸要求。
(2) 路床表面上的车辙或松软部分和压实不足的地方以及任何不符合规定要求的表面都应翻松、清除或掺填同类材料重新进行整修碾压。
(3) 施工前对路床进行复验,同时保证临时排水设施的完好。
(4) 恢复中线测量:直线段每20~25m设一桩,平曲线每10~15m设一桩。
2. 摊铺:
(1) 分层平行摊铺,每层铺设的宽度,应超出路堤的设计宽度30cm,以保证修整路基边坡后的路堤边缘有足够的压实度。
(2) 采用重型振动压路机碾压时,一层压实厚度不宜超过30cm。根据所配置的压路机械,压实总厚度超过一层压实厚度时应分层摊铺,但每层压实厚度不得小于10cm。
(3) 摊铺必须用经监理工程师批准的机械进行作业,将集料按松铺厚度均匀地摊铺在规定的宽度上。
3. 拌和及整型:
(1) 级配碎石的最大粒径不应超过31.5mm(方孔筛),压碎值不应大于26%。碎石中不应含有粘土块、植物等有害物质,针片状颗粒总含量不应超过20%。
(2) 拌和结束后,其含水量应稍高于最佳含水量,以弥补碾压过程中的水分消耗。
在整型过程中,必须禁止任何车辆通行。                             (转下页)
Cards on the table contents:
The project roadbed construction in soft ground after the completion of the first paving stone cushion 30cm thick, holes and a layer of geogrid 40 type two-way, and then paving 20cm thick in the sand cushion, and then fill sand subgrade construction, and finally carried out by wrapping the clay and capped. Specific requirements are as follows:
First, construction of gravel cushion
After completion of soft ground after passing inspection, be capped 30cm thick graded crushed stone bedding.
1. Preparation:
(1) paving before the road bed all the surface dust, debris cleared away, and strictly cosmetic and compaction to meet the design requirements of the drawings.
(2) Road bed surface rutting or soft parts and compaction deficiencies and does not meet the requirements of any surface should be turned loose, clear or mixed with similar material to re-fill repair RCC.
(3) pre-construction bed LO retesting, while ensuring the integrity of the temporary drainage facilities.
(4) restoration of midline measurement: 20 ~ 25m straight line set up one of each, every 10 ~ 15m horizontal curve set 1.
2. Paving:
(1) hierarchical parallel to paving, the width of each floor laying, should go beyond the design of embankment width 30cm, to ensure the repair of embankment after embankment slope edge of a sufficient degree of compaction.
(2) using heavy vibratory roller compacted, the compacted layer thickness of not more than 30cm. According to the mechanical configuration of the roller compaction the total thickness of the layer should be more than the thickness of a layer of compacted paving, but the thickness of each layer compacted not less than 10cm.
(3) paving must be approved by the supervising engineer for operations of machinery will be loose aggregate thickness being evenly by spreading the required width.
3. Mixing and integer:
(1) maximum size gravel gradation shall not exceed 31.5mm (square hole sieve), crushing the value should not exceed 26%. Stone blocks should not contain clay, plants and other harmful substances, the total content of flat-elongated particles should not exceed 20%.
(2) After mixing, the water content should be slightly higher than the optimum water content, to make up for the water consumption of rolling process.
In the integer, it is necessary to prohibit any vehicle traffic. (Next page)

 

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