[1]夏雄,李淋淋,王逸波,等.基坑工程预应力混凝土板桩模型试验研究[J].常州大学学报(自然科学版),2016,(04):64-70.[doi:10.3969/j.issn.2095-0411.2016.04.012]
　XIA Xiong,LI Linlin,WANG Yibo,et al.Experimental Study of Prestressed Sheet Pile in Deep Foundation Pit Engineering[J].Journal of Changzhou University(Natural Science Edition),2016,(04):64-70.[doi:10.3969/j.issn.2095-0411.2016.04.012]
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基坑工程预应力混凝土板桩模型试验研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2016年04期
页码:
64-70
栏目:
出版日期:
2016-07-30

文章信息/Info

Title:
Experimental Study of Prestressed Sheet Pile in Deep Foundation Pit Engineering
作者:
夏雄1; 李淋淋1; 王逸波1; 徐汉东2; 顾荣军2
1. 常州大学 环境与安全工程学院,江苏常州 213164; 2.江苏鼎达建筑新技术有限公司,江苏 常州 213015
Author(s):
XIA Xiong1; LI Linlin1; WANG Yibo1; XU Handong2; GU Rongjun2
1. School of Environment and Safety Engineering of Changzhou University, Changzhou 213164,China; 2. Jiangsu Dingda Construction and New Technology Corporation,Changzhou 213015,China
关键词:
预应力板桩;  基坑;  模型试验;  理正分析
Keywords:
pre-stressedsheet pile;  foundation pit;  model test;  Lizheng analysis
分类号:
TU 473.1
DOI:
10.3969/j.issn.2095-0411.2016.04.012
文献标志码:
A
摘要:
结合常州恐龙园基坑工程,基于预应力板桩支护方案,选取几何相似比1:30,开展基坑土方开挖,坡顶超载共6种工况相似材料模型试验。研究表明:基于9 m深粘土与砂性土互层基坑,桩顶水平位移、土体水平位移及桩身弯矩随着开挖深度和坡顶超载的增大而增大,开挖到预设深度和超载逐渐增大时,基坑变形较大; 开挖完成后正负向最大弯矩出现在开挖深度上下1/3 处; 在3种桩距中,支护结构桩距过大会出现土体绕流,桩距过小又会增加施工成本,因此在考虑基坑变形控制、成本控制的情况下,宜选择桩距为4倍单桩宽度。通过理正软件进行各工况计算,验证模型试验结果正确性。
Abstract:
This study was combined with Changzhou Dinosaur Garden foundation pit engineering, by selecting the physical model with geometric similarity ratio 1:30 based on the support scheme of pre-stressed sheet pile. And the similar material simulation tests were carried out for 6 kinds of operating conditions about excavation of foundation pit and slope overloading. The results show that horizontal displacement of pile top, soil and the moment of the pile increase with the excavation depth or the surcharge increase in the 9 m deep foundation pit of clay and sandy soil. The position of maximum displacement of soil is related to the depth of excavation, which generally appears in the pit bottom upper. The position of maximum moment of the pile is related to the excavation depth,which appears at 1/3 depth up and under the excavation surface, the slopeloading only affects the moment value. In three kinds of pile spacing, horizontal displacement of pile top with the pile spacing increases, and then decrease. And the horizontal displacement of soil and the moment of the pile have same law with the changes of pile spacing. The optimization of the pile spacing is four times of single pile width when considering the effect of support and economic benefits. Furthermore, the calculation results of operating conditions through Lizheng analysis software revifies the reliability of the results through the model test.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-12-24。基金项目:常州市科技局城市建设影响下地面沉降灾害评估与防灾技术研究基金(CE20135038); 江苏鼎达深大基坑新型支挡结构体系与工程应用研究基金(KYH1202162)。作者简介:夏雄(1972—),男,四川成都人,博士,副教授,主要从事环境岩土教学和科研工作。
更新日期/Last Update: 2016-08-30