橋梁鉆孔樁施工工藝2wps格式.doc

1、施工準備
 （1）首先確定鉆孔樁位，修通旱地位置便道，為施工機具、材料運送提供便利。
 本合同段部分橋梁墩身樁基礎位于水中，施工時在施工位置筑島填筑砂礫，島面高出施工期水位1.5m，并整平夯實。如圖,2-1所示。
 （2）平面樁位測量放樣
 用全站儀或經緯儀進行放樣，放樣時對全橋樁位進行一次放樣。放樣結束后利用各樁位相互間距離進行鋼尺測距復核，并對計算數據采用另外程序進行計算復核。測量中誤差≤10mm，并報請監理工程師復核無誤后埋設護樁，護樁埋設在鉆孔樁縱、橫軸方向，四個方向每邊埋設兩個護樁，第一個護樁距護筒邊200cm，第二個護樁距第一個護樁距離≥600cm。
 2、泥漿制備
采用鋼制泥漿槽儲漿，選用優質膨潤土造漿，泥漿比重控制在1.1～1.4范圍。試驗泥漿的全部性能指標，并在鉆進中定

1, construction preparation
 (1) First, determine the place bored piles, repair location through dry pavement, as construction machinery, materials to facilitate delivery.
 Some paragraphs of this contract bridge piers in the water piles, the construction of filling in the gravel island construction building location, construction of the island surface of the water level above the 1.5m, and level the compaction. Figure 2-1 shows.
 (2) measurement of surface Pile Layout
 Setting out with a total station or theodolite, when setting out to conduct a full bridge Pile Layout. Setting out after the use of the distance between pile-bit ranging review of steel rule, and the calculated data calculated by other review procedures. Measurement error of ≤ 10mm, report to review and correct supervision engineers were laid after the piles, bored piles piles buried in the longitudinal and transverse direction, the four directions laid two piles on each side, the first piles away from the casing edge 200cm , the second piles piles away from the first distance ≥ 600cm.
 2, slurry preparation
Pulp slurry storage tank with steel, use high-quality bentonite mud, mud GDP 1.1 to 1.4 range. Performance testing of all mud, and drilling will

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