砂樁施工方案.doc
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砂樁施工
A． 施工方法
a. 恢復中線，放出路段的邊線樁，清理平整作業現場。做好排水系統，保證路基內的水被擠出后能迅速的排出路基。
b. 測繪布設樁位平面圖，準確放出樁位并編號。
c. 將裝有振動器的多功能打樁架在孔位就位，將裝有樁尖的鋼管對準孔位定位。
d. 起動振動器，使鋼管下沉到要求深度后上拔0.5—1.0m，清除樁尖真空吸力，并張開活瓣。
e. 提起振動器和樁帽，從鋼管上口交替入水、砂，同時徐徐提管敲擊，使砂加速下落，并不斷投料使之形成樁柱。
f. 灌砂數量和提管速度要緊密配合，通過計算確定每分鐘灌砂數量和提管高度，保證砂樁連續、密實。
g. 移動樁機，平整砂樁頂地面，鋪筑砂墊層。
B． 工藝流程框圖
主要機械設備：沉管機，發電機，自卸汽車，裝載機。
①施工機具：采用振動打樁機，下部裝活辨鋼樁靴的樁管成樁。
②施工工藝：
整平原地面→機具定位→加料壓密→拔管→機具移位。
Sand Pile
A. Construction Method
a. recovery center line, let the sideline section piles, clean smooth operation site. Good drainage system to ensure the roadbed out of the water is discharged quickly after the roadbed.
b. Pile Layout Plan mapping, accurate release Pile and number.
c. will be equipped with multi-function vibrator hole piling frame in place, will be aligned with the steel pipe pile tip positioning holes.
d. starting vibrator to sink to the required depth of pipe uplift after the 0.5-1.0m, clear the pile tip vacuum suction, and the open valve.
e. bring vibrator and pile caps, turn into the water from the pipe catchy, sand, and slowly put pipe tap to speed up the whereabouts of the sand, and continue to feed to the formation of piles.
f. sand filling the volume and raise the speed to work closely with management, determined by calculating the amount of sand per minute irrigation and provide height, and to ensure continuous sand pile, dense.
g. mobile pile driver, pile top floor flat sand, paving sand cushion.
B. Process Diagram
Main machinery and equipment: immersed tube, generators, dump truck, loader.
① Construction machinery: The vibratory hammer, the lower part of steel pile installation activities identified boots pile pipe pile.
② Construction Technology:
The whole plain of the ground → machinery compaction → Location → feeding → equipment shift extubation.