抗滑桩裂纹控制荷载结构设计法及工程应用

doi:10.13278/j.cnki.jjuese.201701203

吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (1): 171-178.doi: 10.13278/j.cnki.jjuese.201701203

抗滑桩裂纹控制荷载结构设计法及工程应用

安玉科¹, 吴玮江², 张文³, 姚青青¹, 宋建¹, 张宏宏¹

1. 甘肃省交通规划勘察设计院有限公司, 兰州 730030;
2. 甘肃省科学院地质自然灾害防治研究所, 兰州 730000;
3. 吉林大学建设工程学院, 长春 130026

收稿日期:2016-06-15 出版日期:2017-01-26 发布日期:2017-01-26
作者简介:安玉科(1982),男,高级工程师,博士,主要从事公路地质灾害、滑坡、高边坡及岩体工程研究,E-mail:anyukesony@163.com
基金资助:
国家自然科学基金地区基金项目（41362014）；国家自然基金青年基金项目（41402242）

Crack Control Design Method of Anti-Slide Pile and Engineering Application

An Yuke¹, Wu Weijiang², Zhang Wen³, Yao Qingqing¹, Song Jian¹, Zhang Honghong¹

1. Gansu Province Transportation Planning, Survey Design Institute CO., LTD, Lanzhou 730030, China;
2. Geological Hazards Institute, Gansu Academy of Sciences, Lanzhou 730000, China;
3. Construction Engineering College of Jilin University, Changchun 130026, China

Received:2016-06-15 Online:2017-01-26 Published:2017-01-26
Supported by:
Supported byRegional Fund of National Natural Science Foundation of China(41362014) and Youth Fund of National Natural Science Foundation of China (41402242)

摘要/Abstract

摘要： 抗滑桩与桥梁桩和普通侧向受荷桩结构设计的区别在于,抗滑桩容许“大位移”和“超配筋”。荷载结构计算法采用10 mm为位移容许值,导致抗滑桩工程设计中不能充分发挥“大位移”的抗滑性能。本文结合钢筋混凝土受弯构件力学原理,引入抗滑桩裂缝控制准则,在荷载结构计算法的基础上,用裂纹控制准则替代桩顶水平位移容许值进行抗滑桩设计验算,可最大限度地挖掘抗滑桩的抗滑潜力；推导基于K法的抗滑桩设计验算方法的计算公式,阐述裂纹控制荷载结构法的原理、计算和设计流程；以十堰天水国家高速公路K593+850-K594+070滑坡治理工程为案列,分析了抗滑桩桩顶的水平位移组成和影响因素,并比较了传统设计法与本文阐述方法的优缺点。结果表明：桩顶水平位移主要由锚固段岩土体变形引起,位移由岩土体刚度决定,与桩体设计参数无关,优化桩体设计参数仅能限制由桩身弹塑性变形引起的桩顶水平位移。

关键词: 滑坡设计, 抗滑桩计算方法, 水平位移, 裂纹

Abstract: The structural design difference among anti-slide piles, bridge piles and ordinary lateral loaded piles is that anti-slide piles allowed larger horizontal displacement and more reinforcement than ordinary piles. The load structure calculation method of the anti-slide piles adopt allowable displacement in 10 mm. This way can't fully play resistance capability of a large displacement in the design of anti-slide pile. Using the principles of reinforced concrete flexural members mechanics, the paper introduced of the crack control guidelines. On the basis of the load-structure calculation method, replaced the horizontal displacement control by crack guidelines, it carried out anti-slide piles design checking. This method can be developed to maximize the resistance capacity of anti-slide piles. The formula of anti-slide piles design checking method is derived based on "K" method. And the principle, calculation and design process of the crack control design method of anti-slide are described. Taken the project of the K593+850-K594+070 landslide of the Shiyan-Tianshui highway as an example, the paper analyzed composition and influencing factors of the anti-slide pile with top horizontal,and compared the crack control design method with traditional design methods.

Key words: landslide design, anti-slide piles calculation method, horizontal displacement, crack

中图分类号:

P642.22

安玉科, 吴玮江, 张文, 姚青青, 宋建, 张宏宏. 抗滑桩裂纹控制荷载结构设计法及工程应用[J]. 吉林大学学报(地球科学版), 2017, 47(1): 171-178.

An Yuke, Wu Weijiang, Zhang Wen, Yao Qingqing, Song Jian, Zhang Honghong. Crack Control Design Method of Anti-Slide Pile and Engineering Application[J]. Journal of Jilin University(Earth Science Edition), 2017, 47(1): 171-178.

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抗滑桩裂纹控制荷载结构设计法及工程应用

Crack Control Design Method of Anti-Slide Pile and Engineering Application

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