不同抗滑桩间距的隧道-滑坡体系中桩体及隧道衬砌结构承载特征研究

李涛; 朱宝龙; 罗波; 王雄; 李馨

doi:10.13204/j.gyjzG20040307

不同抗滑桩间距的隧道-滑坡体系中桩体及隧道衬砌结构承载特征研究

doi: 10.13204/j.gyjzG20040307

李涛¹,
朱宝龙^1,2, ,,
罗波¹,
王雄³,
李馨¹

1. 西南科技大学土木工程与建筑学院, 四川绵阳 621010;
2. 工程材料与结构冲击振动四川省重点实验室, 四川绵阳 621010;
3. 中国建筑西南勘察设计研究院有限公司, 成都 610032

基金项目:

国家自然科学基金项目（41672342）。

详细信息

作者简介:
李涛,男,1993年出生,硕士研究生。

通讯作者:
朱宝龙,1976年出生,博士,教授,zhubaolong@swust.edu.cn。

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- 被引次数: 0
出版历程
- 收稿日期: 2020-04-03
- 网络出版日期: 2021-11-11

STUDY ON LOAD-BEARING CHARACTERISTICS OF PILES AND LINING STRUCTURE FOR TUNNELS IN TUNNEL-LANDSLIDE SYSTEMS WITH DIFFERENT SPACEINGS OF ANTI-SLIDE PILES

LI Tao¹,
ZHU Baolong^{1,2
, ,},
LUO Bo¹,
WANG Xiong³,
LI Xin¹

1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China;
2. Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang 621010, China;
3. China Southwest Architectural Survey and Design Research Institute Ltd, Chengdu 610032, China

摘要

摘要: 根据实际工程建立了1∶100的缩尺模型，分别对采用3种不同桩间距抗滑桩治理的隧道-滑坡体系中的桩体及隧道衬砌结构受力特征展开试验研究，对比分析抗滑桩桩顶位移、隧道位移、隧道土压力在滑坡失稳时的分布情况及桩身、隧道弯矩在分级荷载之下所呈现出的规律性变化和不同间距抗滑桩对于滑坡-隧道体系的支护效果。试验表明：当桩间距由2.08倍桩径增大至4.16、6.24倍桩径时，同等荷载作用时桩顶水平位移、隧道水平位移、桩身土压力、隧道土压力、桩身弯矩、隧道弯矩逐渐增大。但桩间距由4.16倍桩径增大至6.24倍桩径时位移和弯矩的增大幅度远大于桩间距由2.08倍桩径增大至4.16倍桩径时的情况。因此，滑坡推力较小时，可适当增大桩间距；滑坡推力较大时，应减小桩间距，以利于滑坡作用下隧道衬砌结构的安全。但无论滑坡推力的大小，4.16倍桩径抗滑桩桩间距是隧道抗滑移性价比较高的选择。
- 抗滑桩 /
- 间距 /
- 滑坡 /
- 隧道 /
- 衬砌结构 /
- 承载特性
Abstract: According to a practical project, a scale model of 1:100 was constructed, the load-bearing characteristics of anti-silde piles and lining structure for tunnels in the tunnel-landslide system with three kinds of pile spacing were studied, the top displacement of anti-slide piles, tunnel displacement, earth pressure on tunnels in landslides were analyzed. The variable regularities of the moment in pile shafts and tunnels subjected to graded loads and the support effect of anti-slide piles with different spacings for the tunnel-landslide system were observed as well. The experimental results showed as the spacing of anti-slide piles was increased from 2.08 times the length of the pile diameter to 4.16 and 6.24 times,the horizontal displacement of pile tops or tunnels, earth pressure on pile shafts or tunnels,and moment in pile shafts and tunnels gradually increased. As pile spacing was increased from 4.16 times the length of the pile diameter to 6.24 times, the increase of displacement and moment was much larger than that of pile spacing increased from 2.08 times the length of the pile diameter to 4.16 times. Thus, if the thrust of landslides was small, the pile spacing could be promoted properly. When the thrust of landslides was large, the pile spacing should be reduced to beneficially ensured the safety of lining structure for tunnels. Whether it was large or small for thrust, the spacing of anti-slide piles with 4.16 times the length of the pile diameter was a high cost-performance choice for tunnel protection.
- anti-slide pile /
- spacing /
- landslide /
- tunnel /
- lining structure /
- load-bearing characteristic

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参考文献(16)

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