均质土中钢顶管顶进稳定性的能量法分析

邵光辉; 苏毅; 赵志峰

doi:10.11779/CJGE201608017

均质土中钢顶管顶进稳定性的能量法分析 English Version

南京林业大学土木工程学院,江苏南京210037

基金项目: 住房和城乡建设部科学技术项目（2010-K3-10）; 江苏高校

详细信息

作者简介:
邵光辉（1973- ）,男,博士,副教授,从事城市地下工程、地基处理方面的研究。E-mail: gh_shao@njfu.edu.cn。

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出版历程
- 收稿日期: 2015-07-19
- 发布日期: 2016-08-24

Energy method for stability of steel jacking pipes during construction in uniform soil

School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China

摘要

摘要: 顶管作为一种非开挖技术,越来越多地应用于各种地下管线工程。钢顶管在顶进过程中,如果顶力控制不当,可能发生轴向整体屈曲,从而导致管体结构失稳破坏。针对这一问题,考虑管周土体的约束、管-土摩阻力以及轴线偏差引起的初弯曲等作用,建立并求解了均质土中钢顶管在轴向顶力作用下的能量方程,获得了临界顶力荷载的解析解。然后,从轴线偏差、管周土体地基反力系数、管-土摩阻力方面分析了钢顶管轴向整体稳定系数的变化规律。钢顶管轴向整体稳定系数随长细比增大而减小,轴线偏差显著降低了钢顶管的轴向整体稳定性。顶管周围土体的约束作用增大了钢顶管轴向整体稳定性。管土摩阻力对钢顶管的轴向整体稳定性影响很小,可以忽略不计。均质土中的钢顶管轴向稳定性规律不同于一般的钢结构,临界顶力荷载解析解可以为钢顶管设计提供依据。
- 钢顶管 /
- 轴线偏差 /
- 初弯曲 /
- 整体稳定 /
- 能量法
Abstract: As a trenchless technology, the jacking pipe has been used in more and more underground pipe line projects. The steel jacking pipe may have overall bucking by improper jacking force during construction. Pipe structure will fail by the instability. To deal with this problem, several effects such as constraint of surrounding soil, fraction between soil and pipe and initial bending of pipe are considered. The analytical solution of critical jacking force is deduced by the energy method. The laws for coefficients of stability development are discussed in the aspects of initial bending, coefficient of subgrade reaction of surrounding soil and fraction stress between soil and pipe. The overall stability coefficients decrease with the increasing slenderness for initial bending jacking pipe. The axis line deviation significantly reduces the overall stability. On the other hand, the constraint of surrounding soil strengthens the overall stability. The fraction stress between soil and pipe has little influence on the overall stability and can be ignored. The laws for the overall stability of steel jacking pipes in uniform soil are very different from those for the ordinary steel structural members. The analytical solution of critical jacking force can be used for the design of steel jacking pipes.
- steel jacking pipe /
- axis line deviation /
- initial bending /
- overall stability /
- energy method

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参考文献(12)

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[12]	楼晓明, 吴昊, 黄江枫. 基于 p - y 曲线确定饱和黏性土的地基比例系数[J]. 岩土工程学报, 2012, 34(12): 2206-2212. (LOU Xiao-ming, WU Hao, HUANG Jiang-feng. Determination of slope coefficient of subgrade reaction of saturated clay based on p - y curve[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(12): 2206-2212. (in Chinese)) 《岩土工程学报》征订启事 13 《岩土工程学报》创办于1979年,是我国水利、土木、力学、建筑、水电、振动等六个全国性学会联合主办的学术性科技期刊。由南京水利科学研究院承办,国内外公开发行。主要刊登土力学、岩石力学领域中能代表当今先进理论和实践水平的科学研究和工程实践成果等。报道新理论、新技术、新仪器、新材料的研究和应用。欢迎国家自然科学基金项目及其他重要项目的研究成果向本刊投稿,倡导和鼓励有实践经验的作者撰稿,并优先刊用这些稿件。主要栏目有黄文熙讲座、综述、论文、短文、工程实录、焦点论坛、讨论和简讯等。 14 本刊被《中文核心期刊要目总览》连续多年确认为核心期刊,并在建筑类核心期刊中位于前列;本刊被科技部“中国科技论文统计源期刊”（中国科技核心期刊）及“中国科技论文与引文数据库”收录;本刊被中国科学院“中国科学引文数据库”收录;本刊被“中国知网”全文收录及“中国学术期刊综合评价数据库”收录;本刊被“工程索引Ei Compendex数据库”和“日本科学技术振兴机构数据库JST”等国际数据库收录。本刊网址（www.cgejournal.com）全文发布本刊所有刊载文章。 15 本刊读者对象为土木建筑、水利电力、交通运输、矿山冶金、工程地质等领域中从事岩土工程及相关专业的科研人员、设计人员、施工人员、监理人员和大专院校师生。 16 本刊为月刊,A4开,双栏排版,192页,每月中旬出版,每期定价25元,全年300元。 17 本刊国际标准刊号ISSN 1000-4548,国内统一刊号CN 32-1124/TU,国内发行代号28-62,国外发行代号MO 0520。 18 欢迎广大读者在全国各地邮局订购,也可在编辑部订购（不另收邮费）。编辑部订购地址：南京虎踞关34号《岩土工程学报》编辑部;邮编：210024;联系电话：025-85829534,85829543,85829553,85829556;传真：025-85829555;E-mail: ge@nhri.cn。 19 （本刊编辑部）