兰州理工大学学报

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (5): 130-135.

• 建筑科学 • 上一篇    下一篇

考虑冠梁作用的咬合桩变形计算方法

叶帅华*1,2, 张俊1,2, 李德鹏3, 陶晖3   

  1. 1.兰州理工大学 甘肃省土木工程防灾减灾重点实验室, 甘肃 兰州 730050;
    2.兰州理工大学 西部土木工程防灾减灾教育部工程研究中心, 甘肃 兰州 730050;
    3.甘肃建筑职业技术学院, 甘肃 兰州 730050
  • 收稿日期:2022-03-21 发布日期:2025-10-25
  • 通讯作者: 叶帅华(1983-),男,河南巩义人,博士后,教授. Email:yeshuaihua@163.com
  • 基金资助:
    中国科学院“西部之光”人才培养引进计划“青年学者”A类(地方)项目(020119),兰州市人才创新创业项目(2019-RC-52)

Calculation method of secant pile deformation considering the effect of top beam

YE Shuai-hua1,2, ZHANG Jun1,2, LI De-peng3, TAO Hui3   

  1. 1. Key Laboratory of Disaster Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China;
    2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou730050, China;
    3. Gansu Vocational College of Architecture, Lanzhou 730050, China
  • Received:2022-03-21 Published:2025-10-25

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摘要： 针对现阶段咬合桩结构变形计算研究不足的问题,在考虑冠梁作用的基础上,采用p-y曲线法建立咬合桩变形计算模型,推导出计算咬合桩结构变形的公式,并利用有限差分法对计算咬合桩结构变形公式进行求解.依托兰州某深基坑工程案例,将所提算法计算出的结果与PLAXIS 3D有限元软件模拟出的结果进行对比分析.结果表明:在计算咬合桩的变形时,通过刚度等效原理,将咬合桩结构等效为地下连续墙结构计算是可行的;冠梁与咬合桩结构存在协同变形关系,冠梁能够控制咬合桩结构的变形;所提算法计算结果与数值模拟结果虽然趋势相同,但数值存在一定差异,这是由于计算过程中与模拟过程中咬合桩桩底的约束条件及土体的本构关系不同造成的.

关键词: 深基坑, 咬合桩, 变形, 计算方法

Abstract: Aiming at the problem of insufficient research on the deformation calculation of the secant pile at present, on the basis of considering the effect of the top beam, the p-y curve method is used to establish the deformation calculation model of the secant pile, and the formula for calculating the structural deformation of the secant pile is deduced. The finite difference method is used to solve the formula for calculating the deformation of secant pile structure. Based on the case of a deep foundation pit in Lanzhou, the results calculated by the proposed calculation method are compared with the results simulated by the PLAXIS 3D finite element software. The results show that:When calculating the deformation of secant pile, it is feasible to equivalent secant pile structure to underground diaphragm wall structure through stiffness equivalent principle.There is a cooperative deformation relationship between the top beam and the secant pile structure, and the top beam can control the deformation of the secant pile structure.Although the trend of the results calculated by the proposed calculation method is the same as that of the numerical simulation, there are some differences in the numerical value, which is due to the different constraint conditions of the bottom of the secant pile and the constitutive relation of the soil in the process of calculation and simulation.

Key words: deep foundation pit, secant pile, deformation, calculation method

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