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1、測量放樣錨桿樁施工工藝流程Survey setting anchor pile construction process由于受橋樁空間(最低處凈空2. 0 m)及設備本身高度的限制,復合錨桿樁在施工前,先開挖2 mBecause of the pile space (the lowest clearance 2 m) and their height limit device, composite bolt pile before construction, the 2 m first excavation寬、1. 5 m深的基槽(施工完成后回填混凝土,恢復至原地面高程),以加大操作空間,便于2、施工作業。成孔后豎向錨桿及支撐采用分節連接,每節長2 m,用接駁器連接,地面多余鋼筋待施工完成后截除。1.5 m wide, deep trench (after the completion of construction of concrete, restore to the original ground elevation), in order to increase the operating space, convenient construction operation. After the hole of vertical anchor and supported by the3、 section connection, each section of length 2 m, connected by the connector, ground of excess steel to be after the completion of construction of amputation.(1)施工準備。根據設計要求做好樁位的軸線標記和測量放樣,按樁位施工。為了確保錨桿樁的精確定位,需使用特制的定位器進行定位。(1) the construction preparation. Do the axis marking and measuring the lofting o4、f the pile position according to the design requirements, according to a pile construction. In order to ensure accurate positioning of anchor pile, require special positioner positioning.(2)鉆機夯進。采用sh-1030鉆機(需對其進行局部改造)沖擊、套管跟進成孔。鉆機在設計樁位安裝就位后,檢查沖擊桿是否垂直;然后用150鉆頭開口34m,下127mm套管,螺旋開挖成孔;當套管跟進到設計深度后終孔。(2) in5、to the drill rammer. Using the sh-1030 drilling rig (for local transformation of its impact, follow-up sleeve hole). Rig in the design of pile position after installation, check the impact rod is vertical; then 150 bit opening under 34m, 127mm casing, spiral excavation hole; when the casing to the d6、esigned depth after the final hole(3)復合錨桿制作和安裝。(3) the production and installation of composite bolt.復合錨桿制作。先用3根20螺紋鋼組成一個鋼筋籠。另由12鋼筋圍成一個內徑30 mmProduction of composite bolt. The first 3 Phi 20 steel is composed of a steel cage. The other by phi 12 steel round into a diameter of 30 mm的鋼筋籠隔離環,縱向每米1環與鋼筋及7、定位支撐焊接。定位支撐由18螺紋鋼筋彎成寬40 mm,高200 mm的環行。The reinforcement cage spacer ring, vertical 1 metres per ring and bar and a positioning supporting welding. Positioning is supported by a 18 bar bent into a width of 40 mm, 200 mm ring采用簡易支撐架吊放,人工配合就位。Using simple support dipping, artificial.(4)注漿加固。復合錨桿就位后,拔出鉆8、孔套管準備注漿。注漿采用3根注漿管, 乳化液泵站每根注漿管出口范圍距底端4 m,注漿管直徑為20 mm,出漿孔直徑為4 mm,四孔豎向錯開150 mm。注漿管豎向安裝時,第一根注漿管端不封閉,其他兩根管端封閉,并且第二根注漿管比第一根、第三根短4 m,給第一根管注漿時,第二根、第三根管的出漿孔用漿液隔離塑料膠帶粘貼,防止注漿時封堵出漿孔。注漿采用施壓密注漿,注漿分3次:第1次注漿采用常壓注漿,注漿壓力為0. 40. 6 mpa,孔口溢漿時結束本次注漿,水泥漿水灰比為0. 51;第2次注漿采用中高壓注漿,在第1次注漿完成后1015 h進行,注漿壓力為1. 05mpa,水泥漿水灰比為0. 751;9、第3次注漿壓力為1. 52. 0mpa, 復合土工膜在第2次注漿完成后510 h進行,水泥漿水灰比為0. 751。所有注漿材料采用普通硅酸鹽52. 5級水泥。合錨桿樁是利用錨桿技術及其機理而衍生出的一種新的基礎加固技術,以其工藝簡單、加固效果好、經濟合理等特點。(4) the grouting reinforcement. Composite anchor in place, pull out the borehole casing for grouting. Grouting adopts 3 grouting pipe, each grouting pipe exports from th10、e bottom of the 4 m, the grouting pipe diameter of 20 mm, a slurry outlet hole diameter of 4 mm, four hole of the vertical staggered 150 mm. The grouting pipe vertical installation, the first root grouting pipe end is not closed, the other two ends closed tube, and the second root grouting pipe than11、 the first root, third short 4 m, to the first tube grouting, second root, third root canals with plastic tape pulp slurry isolation to prevent hole, grouting and plugging up grouting hole. Pressure Grouting grouting, grouting is divided into 3 times: first times of common pressure grouting, groutin12、g pressure of 0 40., 6 MPa, orifice grout when the end of the grouting, grout water cement ratio is 0.5 1; second grouting with high pressure grouting in, 1015 in first h after grouting, grouting pressure 1 05mpa, water slurry water-cement ratio of 0.75 1; third grouting pressure was 1 52. 0mpa, 51013、 in second h after grouting, grout water cement ratio is 0.75 1. All the grouting material with ordinary portland cement 52.5 level. Composite anchor pile is a new foundation reinforcement technology using the technology and mechanism of bolt and the derived, with the characteristics of simple process, good reinforcement effect, economic and reasonable.