管桩技术在市政道路施工中的应用分析

• 作 者: 刘剑
• 机 构: 东莞市松山湖公用事业有限公司,
• 出 处: 建材与装饰(中旬刊)
• 发表日期: 2008年07期
• 关键词: 薄壁管桩 管桩 现浇薄壁管桩 软基加固 市政道路 市政道路施工 地基加固 沉桩过程 桩身质量 挤土效应

介绍现浇混凝土薄壁管桩技术以及在某市政道路软基加固中的应用。对现浇薄壁管桩进行了静载试验,桩基容许承载力超过了设计值,满足了工程要求;通过低应变测试分析,检测桩桩身质量完整。通过现场测试沉桩过程中地面水平位移和桩周土压力的变化,发现薄壁管桩侧向挤土效应小,沉桩对周围土体变形影响小。

Introduction of cast - in - place concrete thin - wall pipe pile technology and its application in soft ground reinforcement of a municipal road. The static load test of cast-in-situ thin-walled tubular piles is carried out. The allowable bearing capacity of the pile exceeds the design value, which meets the engineering requirements. Through the low-strain test and analysis, the quality of the pile body is verified. Through on-site testing of the horizontal displacement of the ground and the change of earth pressure around the pile during pile driving, it is found that the lateral squeezing effect of the thin-walled pipe pile is small and the pile driving has little effect on the deformation of the surrounding soil.