土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (3): 268-271.

• 工程实录 • 上一篇    下一篇

深基坑旋喷锚桩支护结构设计及其参数优化研究

席早阳，杨素新，李 跃   

  1. （温州工程勘察院有限公司，浙江温州 325000）
  • 收稿日期:2020-05-07 修回日期:2020-05-20 出版日期:2021-06-25 发布日期:2021-06-25
  • 作者简介:席早阳（1986-），男，硕士，岩土工程师，研究方向为岩土工程。

Optimization Design of Jet Grouted Ground Anchors in the Deep Excavation Supporting System

XI Zaoyang, YANG Suxin, LI Yue   

  1. (Wenzhou Engineering Survey Institute Co. Ltd., Wenzhou 325000)
  • Received:2020-05-07 Revised:2020-05-20 Online:2021-06-25 Published:2021-06-25

摘要： 为解决旋喷锚杆大多采用普通锚杆的设计方法，偏于保守设计造成材料浪费的困难，以某深基坑具体工程实例，通过ABAQUS数值模拟分析开挖对基坑的影响，同时进行旋喷锚杆设计参数的优化分析，得到了旋喷锚杆不同锚杆长度、预应力和锚杆倾角对基坑整体稳定性的影响，并最终得到优化方案为锚杆长度为13 m（第一道），12 m（第二道），锚杆预应力为150 kN，锚杆倾角为15°。所得结论可为今后类似旋喷锚杆支护工程提供借鉴，也可为该型支护结构设计的改进和优化提供新的思路和方法。

关键词: 深基坑, 旋喷锚杆, 设计参数, 数值模拟, 优化设计

Abstract: In a deep excavation supporting system, conventional ground anchor design approach is usually used for the jet grouted ground anchor design. It is recognized that this approach results in the conservative design and waste in the material. This paper presents a numerical analysis using ABAQUS commercial software on the excavation process of a deep excavation project. In the analyses, the design parameters optimization of jet grouted ground anchor is also performed. The effect of the jet grouted ground anchor length, magnitude of prestress and anchor inclination angle of the global stability of the deep excavation is also studied in this paper. The optimized jet grouted ground anchors are as follow: first layer anchor: 13 meters and 12 meters for the second layer with a prestressed forced of 150 kN and inclination angle of 15 degrees. This evaluation provides a case history for the deep excavation supporting structure design in similar conditions.


Key words: Deep Excavation, Jet Grouted Ground Anchors, Design Parameters, Numerical Simulation, Optimized Design

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