湖相沉积土层超长灌注桩承载力数值模拟研究

Study on Numerical Simulation of Bearing Capacity of Super-Long Cast-in-Place Pile in Lacestrine Sedimentary Soil

在施工过程中使用超长钻孔灌注进行支撑时,经常会出现孔壁坍塌、缩颈、桩底沉渣等一系列现象,这些问题往往使得工程不能及时合理地完成,因此针对这一问题,本文结合岳常高速公路TJ-05标段施工实践,对湖相沉积土层超长灌注桩承载力数值进行模拟研究,并对造成该问题的因素进行分析,找出有效解决方案并提出相应的防治措施,也为今后此类问题的处理打下良好基础。

in the course of construction , a series of phenomena , such as wall collapse, neck reduction, pile bottom sediment , etc., often occur when using ultra-long borehole perfusion for support. These problems often make it impossible to complete the project in a timely and reasonable manner. Therefore , aiming at this problem , Based on the construction practice of the TJ-05 standard section of Yuecheng Expressway , the paper simulated the bearing capacity of the Super long perfusion pile in the lake sedimentary layer , analyzed the factors causing the problem , and found out the effective solutions and put forward the corresponding prevention measures. It also provides a good basis for addressing such issues in the future.