Preparation before construction of vibrating immersed tube gravel pile
Vibration-immersed tube crushed stone pile method is a method that uses vibration-immersed tube to form holes, and adds hard particles to the tube, and forms crushed stone pile to treat the foundation by pulling out the tube and vibration densityLarge diameter vibrating immersed tube rubble pile The pile diameterCan be up to1200mm, pile length can be reached40mThe above.
1,Put the pile location
(1)Prior to construction, the contractor shall be required to draw and review the layout drawings according to the design requirements.
(2)Check the contractor's pile setting out according to the layout drawing to check whether the pile position is correct.
Gravel pile body material according to the source of the situation can be used gravel, gravel and slag and other hard granular materials. The mud content of pile material should not be greater than5%, the particle diameter should be determined according to the power of the pore-forming equipment and related performance parameters and the properties of the foundation soil, and the particle size should not exceed200mm, grain grading should not be single grading.
(1)The vibration sink pipe shall be made of steel pipe, and the upper part shall be assembled by detachable pipe section. The outer diameter shall not be less than the designed pile diameter of the gravel pile, and the wall thickness of the pile pipe shall not be less than the pipe diameter1.5%.And not less than6mm. Before construction, a clear scale is marked on the steel pipe to control the sink depth.
(2)Sink tube boot can be selected tapered or internal valve shape (check valve), should be closed before construction, tapered tube boot cutting effect is better, it is recommended to use as far as possible.
(3)Packing machine is optional0.5-1.5m³The loader and the unloading hopper. The bucket capacity calibration work must be done after the equipment enters the field.
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