计算压力注浆土钉峰值摩阻力的理论模型

发布时间：2018-04-18 07:21

本文选题：土钉 + 灌浆压力　；参考：《东南大学学报(自然科学版)》2016年S1期

【摘要】：为研究土钉的峰值摩阻力与一些主要参数的关联性,量化灌浆压力、上覆土压力以及土体剪胀角对土钉峰值摩阻力的影响,首先,利用小孔扩张理论提出土钉周围破坏面与土钉灌浆压力的关联性;其次,根据土体的摩尔破坏理论推导土钉峰值摩阻力与土体破坏面正应力的关系;然后,利用室内试验结果验证提出模型的有效性;最后,根据土钉峰值摩阻力的计算简化模型展开参数研究,深入分析不同参数对土钉峰值摩阻力的影响.参数分析证明:土钉的峰值摩阻力同时受到灌浆压力、上覆土压力以及破坏面距离的相互作用影响,且土钉峰值摩阻力的增加幅度在无注浆压力比存在注浆压力时要快.该模型较为简化且利于设计中进行考虑计算.
[Abstract]:In order to study the relationship between the peak friction of soil nailing and some main parameters, and to quantify the effects of grouting pressure, overlying earth pressure and soil shear expansion angle on the peak frictional resistance of soil nailing, first of all,The relationship between the soil nailing grouting pressure and the failure surface around the soil nailing is presented by using the small hole expansion theory. Secondly, the relationship between the peak friction of soil nailing and the normal stress of the soil failure surface is deduced according to the soil molar failure theory.The validity of the proposed model is verified by laboratory test results. Finally, the parameters of the simplified model are studied based on the calculation of soil nailing peak friction resistance, and the effects of different parameters on soil nailing peak friction resistance are deeply analyzed.Parameter analysis shows that the peak friction of soil nailing is affected by the interaction of grouting pressure, overlying earth pressure and damage surface distance at the same time, and the increase of peak friction resistance of soil nailing is faster than that without grouting pressure.The model is simplified and can be considered in design.
【作者单位】：上海大学土木工程系;中国地震局地质研究所地震动力学国家重点实验室;广东省高等学校结构与风洞重点实验室;香港理工大学土木与环境工程学系;东华大学产业用纺织品教育部工程研究中心;上海勘测设计研究院有限公司;
【基金】：地震动力学国家重点实验室开放基金课题资助项目(LED2013B01) 国家自然科学基金青年科学基金资助项目(41602352) 广东省高等学校结构与风洞重点实验室资助项目(201603)
【分类号】：TU472

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