土工基础

›› 2016, Vol. 30 ›› Issue (3): 362-364.

• 工程实录 • 上一篇    下一篇

预制方桩锤击沉桩收锤标准控制的探讨

王 伟1,2,3，刘晶晶1,3，宋鹏波1，郝彦鹏1，郑云峰1,3，乔永立1   

  1. （1.河北建设勘察研究院有限公司，石家庄 050031； 2.北京交通大学土木建筑工程学院，北京 100044；
    3.河北省岩土工程技术研究中心，石家庄 050031)
  • 收稿日期:2016-01-31 修回日期:2016-02-25 出版日期:2016-06-20 发布日期:2016-06-21
  • 作者简介:王 伟（1982-），男，硕士研究生，高级工程师，研究方向为岩土工程。

Driving Criteria for Prefabricated Reinforced Concrete Square Piles

WANG Wei1,2,3, LIU Jingjing1,3, SONG Pengbo1, HAO Yanpeng1, ZHENG Yunfeng1,3, QIAO Yongli1   

  1. (1.Hebei Research Institute of Construction and Geotechnical Investigation Co. Ltd., Shijiazhuang 050031;
    2.School of Civil Engineering, Beijing Jiaotong University. Beijing 100044;
    3.Technology Center of Geotechnical Engineering of Hebei Province, Shijiazhuang 050031)
  • Received:2016-01-31 Revised:2016-02-25 Online:2016-06-20 Published:2016-06-21

摘要： 预制方桩锤击沉桩施工过程中，往往以“标高控制为主，贯入度控制为辅”作为收锤标控制标准。然而实际施工时，往往过于强调控制沉桩桩端标高和桩长，致使桩头打裂、桩身打断的情况较多，给工程造成不必要的损失。结合实际工程，根据海力（Hiley）公式推导出贯入度的计算公式，对贯入度进行了动力计算，计算结果有效指导了实际工程施工。

关键词: 预制方桩, 收锤标准, 贯入度, 动力计算

Abstract: In the installation of prefabricated reinforced concrete square pile practice, the driving criteria are usually primarily controlled by the tip elevation and the pile penetration rates are the secondary indices. In the practical engineering, due to the over emphasis of the total penetration length and the elevation, the pile heads are usually cracked and piles might be damaged. This project presents a penetration control formula based on the Hiley Approach. The WEAP analysis was performed and the results were satisfactory.

Key words: Prefabricated Reinforced Concrete Square Piles, Driving Criteria, Pile Penetration Rate, Dynamic Formula