本文選題：橡膠輪胎散體樁　切入點(diǎn)：復(fù)合地基　出處：《沈陽建筑大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年06期 　論文類型：期刊論文

【摘要】：目的分析橡膠輪胎散體材料樁(RGP)群樁的承載性能,為橡膠輪胎散體樁復(fù)合地基的實(shí)際應(yīng)用提供設(shè)計(jì)參數(shù).方法通過ABAQUS有限元軟件建立樁土三維有限元模型,研究不同樁長、樁徑、樁間距及褥墊層厚度等對(duì)橡膠輪胎散體樁群樁承載性能的影響,得到載荷-位移、樁身應(yīng)力等關(guān)系曲線.結(jié)果 RGP樁復(fù)合地基的沉降隨樁長的增加而減小,但存在有效樁長.隨著樁間距的增加,RGP樁復(fù)合地基的承載力、樁頂應(yīng)力和樁身最大應(yīng)力增加,樁土應(yīng)力比先增大后減小.隨著樁徑的增加和褥墊層厚度的增加,RGP樁復(fù)合地基的承載力均呈增加趨勢(shì),樁土應(yīng)力比減小.樁徑的增加在提高復(fù)合地基置換率的同時(shí)也使得橡膠輪胎的環(huán)箍能力降低,所以RGP樁復(fù)合地基設(shè)計(jì)時(shí)應(yīng)綜合考慮樁土承載能力和橡膠輪胎的環(huán)箍作用.結(jié)論合理調(diào)節(jié)樁長、樁徑、樁間距、褥墊層厚度等參數(shù)會(huì)促進(jìn)樁土協(xié)同作用的發(fā)揮,進(jìn)而改善RGP樁復(fù)合地基的承載能力.
[Abstract]:Objective to analyze the bearing capacity of rubber tire bulk pile group piles, and to provide design parameters for the practical application of rubber tire bulk pile composite foundation. Methods Three-dimensional finite element model of pile soil was established by ABAQUS finite element software, and different pile lengths were studied. The influence of pile diameter, pile spacing and cushion thickness on the bearing capacity of rubber tire pile group pile group is obtained. The load-displacement and pile body stress curves are obtained. Results the settlement of RGP pile composite foundation decreases with the increase of pile length. But there is effective pile length. With the increase of pile spacing, the bearing capacity of RGP pile composite foundation increases, the pile top stress and the maximum pile body stress increase. With the increase of pile diameter and the thickness of cushion, the bearing capacity of RGP pile composite foundation is increasing. The increase of pile diameter not only increases the replacement rate of composite foundation, but also reduces the hoop capacity of rubber tire. Therefore, the bearing capacity of pile and soil and the ring and hoop of rubber tire should be considered in the design of RGP pile composite foundation. Conclusion reasonable adjustment of pile length, pile diameter, pile spacing and cushion thickness will promote the synergistic effect of pile and soil. Then the bearing capacity of RGP pile composite foundation is improved.
【作者單位】： 沈陽建筑大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51578348) 遼寧省“百千萬人才工程”項(xiàng)目(2015-57)
【分類號(hào)】：TU473.1

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