土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (1): 9-11.

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某中学基坑工程抗浮设计方案优化分析

董培鑫，杨浩军，阚生雷，张向营   

  1. （北京城建勘测设计研究院有限责任公司，北京 100101；城市轨道交通深基坑岩土工程北京市重点实验室，北京 100101）
  • 收稿日期:2019-05-13 修回日期:2019-05-27 出版日期:2020-04-20 发布日期:2020-04-20
  • 作者简介:董培鑫（1987-），女，博士研究生，工程师，研究方向为岩土工程勘察、设计。

Optimization of Buoyancy Design for the Sports Ground of a Middle School

DONG Peixin, YANG Haojun, KAN Shenglei, ZHANG Xiangying   

  1. (Beijing Urban Construction Exploration & Surveying Design Research Institute Co. Ltd., Beijing 100101;
    Beijing Key Laboratory of Geotechnical Engineering for Deep Excavation of Urban Rail Transit, Beijing 100101)
  • Received:2019-05-13 Revised:2019-05-27 Online:2020-04-20 Published:2020-04-20

摘要： 为解决某中学操场整体抗浮问题，原设计方案采用抗拔桩，但由于受现场条件限制，施工困难无法实施，需进行设计方案优化。依据岩土工程勘察报告资料，考虑现场工程实际情况，按照抗拔承载力等值代换原则，优化方案采用全粘结抗浮锚杆代替抗拔桩，对抗浮锚杆进行计算验证和优化效果分析，得出在满足技术要求的前提下，采用抗浮锚杆不仅能有效解决抗拔桩现场施工困难问题，而且作业效率高、经济效益好。研究结论对相似工程具有一定的借鉴和参考价值。

关键词: 抗浮桩, 抗浮锚杆, 优化设计

Abstract: The piled foundation for the sports ground of a middle school was planned to resist the buoyancy uplift forces. However, construction difficulties were encountered, and the piles could not be installed. This paper presents the construction phase design change of using fully grouted rock anchors to meet the uplift requirements. The rock anchor design considered the sitespecific conditions revealed in the geotechnical investigation report. The total uplift forces determined from the piled foundations are also applied in the rock anchors. The design analysis and the optimization process indicate that the utilization of rock anchors for the buoyancy design can effectively resolve the constructability issues of pile foundation and the rock anchors have the advantages of cost effective and fast construction.

Key words: Tension Piles, Uplift Anchors, Optimization Design

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