一种载体桩的施工方法

Carrier pile construction method

  • Inventors: WANG JIZHONG
  • Assignees: 王继忠
  • Publication Date: September 16, 2015
  • Publication Number: CN-104912061-A

Abstract

本发明的目的在于提供一种载体桩的施工方法,针对桩端所处土层较硬的特性,采用动能直接对桩端土体进行夯实挤密,并通过成孔方式和成桩方式的改进,适应多种地质条件和设计要求变化的需求。为了实现上述目的,本发明的施工方法的步骤为:1)在桩位处通过动力将护筒或者外管沉入至设定深度;2)在护筒或者外管内,利用重锤或者内管的锤击动能,对桩孔底部的土体进行夯击,使桩端土体得到加固挤密;3)反复进行夯击操作,并测量重锤或者内管的数击的贯入度,当贯入度测量值满足设计值时,停止夯击,使桩端下一定深度和范围内的土体被加固密实,形成桩端载体,实现载体桩的等效计算面积Ae;4)进行桩身的施工。
The invention aims to provide a carrier pile construction method. According to the characteristic that the soil layer where the pile end is located is harder, punning and compaction are conducted on the soil body of the pile end directly through kinetic energy, and the requirements of multiple geological conditions and design requirement change are met through the improvement of the pore-forming mode and the pile-forming mode. To achieve the purpose, the construction method includes the steps that 1, a pile casing or an outer tube is sunk into the set depth through power at the pile position; 2, punning is conducted on the soil body at the bottom of a pile hole through the hammering kinetic energy of a heavy hammer or an inner tube in the pile casing or the outer tube, and the soil body of the pile end is reinforced and compacted; 3, punning is conducted repeatedly, the penetration of several times of striking of the heavy hammer or the inner tube is measured, when the penetration measuring value meets the design value, punning is stopped, the soil body, within certain depth and range, below the pile end is reinforced and compacted, a pile end carrier is formed, and the equal calculation area Ae of the carrier pile is achieved; 4, pile body construction is conducted.

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