土工基础

›› 2018, Vol. 32 ›› Issue (1): 4-9.

• 工程实录 • 上一篇    下一篇

地下综合管廊软土地基水泥土搅拌桩处理的优化设计研究

周 恒1，范 翔2，杜 超2，谢德虎3，车鸿博3   

  1. （1.南京市江北新区公共工程建设中心，南京 211800；2.北京市市政工程设计研究总院有限公司，北京 100082；3.东南大学岩土工程研究所，南京 210096）
  • 收稿日期:2017-02-28 修回日期:2017-11-09 出版日期:2018-02-20 发布日期:2018-03-01
  • 作者简介:周 恒（1975-），男，高级工程师，研究方向为市政道路岩土，交通工程。
  • 基金资助:

    国家自然科学基金（41572273）；十二五国家科技支撑计划项目（Q012BAJ01B02）

Soil Mixing Optimization Design of Utility Culverts in Soft Soils

ZHOU Heng1, FAN Xiang2, DU Chao2, XIE Dehu3, CHE Hongbo3   

  1. (1.Construction center of public works in Jiangbei district, Nanjing 211800；
    2.Beijing Municipal Engineering Design & Research Institute Co., Ltd., Beijing 100082；
    3.Institute of Geotechnical Engineering, Southeast University, Nanjing 210096)
  • Received:2017-02-28 Revised:2017-11-09 Online:2018-02-20 Published:2018-03-01

摘要： 建设中的南京市浦口新城核心区综合管廊位于长江漫滩软土地区，管廊基坑地基处理方式以水泥土搅拌桩为主。其中临江路段管廊为双舱结构，现状工况中水泥土搅拌桩桩径D=500 mm，桩心距纵向为1.5 m，横向为1.2 m。以临江路段为例，运用大型三维有限元软件，通过改变桩身模量、桩间距和桩长，在满足综合管廊沉降控制要求的前提下，进行水泥土搅拌桩处理参数的优化，以达到经济效益的目的，并对类似工程具有借鉴意义。

关键词: 综合管廊, 软土地基, 水泥土搅拌桩, 参数优化

Abstract: The Pukou Central Business District (CBD) is in the soft soil zone Yangtze River of alluvium zone. The soilcement mixing column is the major soil improvement method for the combined utility culverts. A doublecell culvert cross section was used in area underneath Linjiang Road. The soilcement mixing column had a diameter of 500 mm, spacing in the longitudinal direction was 1.5 meters and 1.2 meters in the transverse direction. The performance of the soil mixing columns with various column stiffness, spacing and column length were parametric studied through the threedimensional finite element analysis. The soil improvement design for the utility culverts was able to be optimized from these numerical investigations.

Key words: combined utility culverts, soft soils, soilcement mixing columns, design optimizations