塑料排水板施工技術交底.doc

塑料排水板施工技術交底
一、 材料
C型塑料排水板截面尺寸100×4.5mm，抗拉強度不小于130N/cm，要有出廠合格證，報監理認可。
二、操作工藝
砂墊層施工經監理認可后，進行施工。
1、放線：按梅花形布置，部位樁長見設計圖L—11，根數見設計圖L-13。           
2、塑料排水板要求穿過淤泥軟土層及軟弱下臥層進入砂層至少0.5m，排水板的最大施工深度按25m控制。插完后排水板伸出砂墊層20cm。
3、 遇魚塘、甘蔗地、溝渠，必須排水晾曬，挖除植物根，鏟平塘梗。
4、 如場地太軟，則在表面鋪荊笆、塑料編織、尼龍編織等土工合成材料后修筑道路，機械進場。
5、 50cm厚砂墊層用中粗砂，含泥量小于5%，干密度不得小于1.6g/cm3,壓實厚度為50cm，砂墊層伸出路堤坡腳外1m，當路堤設計高度大于3.5m時，在砂墊層中加鋪一層單向土工格柵，土工格柵的抗拉強度不小于50KN/m。另外，在與攪拌樁交接處前后各10米長采用雙向土工格柵，其抗拉強度不小于50KN/m。
6、 塑料排水板接長時，必須采用濾膜內芯板平搭接的方式，搭接長度不得小于200mm。
7、 嚴格控制回帶長度，不得超過500mm，否則要在附近補打，回帶的根數應控制在總打設根數的5%以內。
8、 樁長與套管配合要適當，以免淤泥進入。
三、質量標準
塑料排水板施工允許偏差
Construction Technology Details of plastic drainage plate
One, materials
C-section size of plastic drainage plate 100 × 4.5mm, the tensile strength of not less than 130N/cm, have factory certification, accreditation reports supervision.
Second, the operation process
Construction Supervision approved by the sand cushion was conducted after the construction.
1, actinomycetes: by plum-shaped layout, site design pile length, see Figure L-11, root number, see design L-13.
2, plastic drain requirements through mud and soft soil into the soft underlying layer of sand at least 0.5m, the maximum drain depth of construction control by 25m. After drain plug out of sand cushion 20cm.
3, case of fish ponds, sugar cane, the ditch must be dry drainage, excavation of plant roots, stems pingtang shovel.
4, such as the site is too soft, the surface of shops in the Wattle Tree, plastic weaving, knitting and other geosynthetics nylon after the construction of roads, mechanical approach.
5, 50cm thick cushion used in the coarse sand, mud content less than 5%, dry density of not less than 1.6g/cm3, compacted thickness of 50cm, outside foot embankment sand cushion out of 1m, when the embankment design height greater than 3.5m, the increase in the layer of sand cushion in a one-way geogrid, geogrid tensile strength not less than 50KN / m. In addition, with the mixing junction 10 meters before and after the two-way geogrid, the tensile strength of not less than 50KN / m.
6, plastic drainage plate lengthening must apply membrane level within the core board lap of the way, Lap length not less than 200mm.
7, strictly control the back with a length of not more than 500mm, or up to fight in the vicinity, back to the root of the number should be controlled with the total number of Installation root less than 5%.
8, with the pile length and the casing should be appropriate to prevent silt entering.
Third, quality standards
Tolerance of plastic drain board construction
 

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