型钢-混凝土组合旋挖支护桩性能

发布时间：2018-05-15 12:25

本文选题：型钢-混凝土桩 + 旋挖桩　；参考：《土木建筑与环境工程》2015年S2期

【摘要】：型钢-混凝土组合支护桩(劲性桩)是一种在混凝土灌注桩中配置型钢的支护桩体。旋挖钻孔灌注桩是一种被誉为"绿色施工工艺"的桩体施工工艺。将二者有机结合起来,不仅极大提高施工效率,因内置型钢,桩身承载能力也得到加强,在确保基坑开挖时基坑稳定问题的同时也符合绿色环保、产业化施工。本文为研究型钢混凝土组合桩的受力性能,对3个试件分别进行了拟静力试验,考察了劲性桩的承载力、变形能力,并采用ABAQUS软件对3个试件进行了非线性有限元数值分析,分析结果与试验值对比符合程度较好。再对型钢混凝土组合桩与旋挖成桩工艺的组合效果以及其施工流程简要描述,结合二者分析其施工技术与应用并得出其具有良好的社会和经济适用性,可参考利用于相应基坑支护工程中。
[Abstract]:Steel-concrete composite supporting pile (stiffened pile) is a kind of supporting pile body which is equipped with section steel in concrete cast-in-place pile. Rotary digging bored pile is a kind of pile body construction technology known as "green construction technology". The combination of the two methods not only greatly improves the construction efficiency, but also strengthens the bearing capacity of the pile body because of the built-in steel, which not only ensures the stability of the foundation pit during excavation, but also accords with the green environmental protection and industrial construction. In order to study the mechanical behavior of steel reinforced concrete composite piles, quasi-static tests were carried out on three specimens, the bearing capacity and deformation capacity of the stiffened piles were investigated, and the nonlinear finite element numerical analysis of the three specimens was carried out by using ABAQUS software. The comparison between the results of the analysis and the test data is in good agreement. Then the combined effect of SRC composite pile and rotary excavation pile and its construction process are briefly described, and the construction technology and application are analyzed, and the good social and economic applicability is obtained. It can be used in the supporting engineering of foundation pit.
【作者单位】：重庆大学土木工程学院;重庆一建建设集团有限公司;
【基金】：重庆市建设科技计划(20140006)
【分类号】：TU473.1

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