| 搅拌水泥土锚杆抗拔变形试验改进研究 |
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| 引用本文： | 刘干斌,沈学毅,苏舟,陆林龙.搅拌水泥土锚杆抗拔变形试验改进研究[J].岩土力学,2011,32(Z1):78-82. |
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| 作者姓名： | 刘干斌 沈学毅 苏舟 陆林龙 |
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| 作者单位： | 1. 宁波大学 建筑工程与环境学院，浙江 宁波 315211；2. 宁波大学地基处理中心，浙江 宁波 315211 |
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| 基金项目： | 宁波市重大科研攻关项目资助(No.2009C50004) |
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| 摘 要： | 搅拌水泥土锚杆能提供较大的承载力,优于同等条件下的土钉,但变形控制性能较支撑形式差。在前期的试验研究和工程应用基础上,分析了搅拌水泥土锚杆的破坏形态及存在的问题,提出增加搅拌叶片和二次注浆以提高搅拌水泥土锚杆抗拔力的改进试验方案。通过搅拌叶片布置设计和抗拔试验,测定锚杆轴力分布,结果表明:增加叶片后12 m长锚杆的效果与15 m普通搅拌水泥土锚杆接近,增加带加劲肋的叶片有助于提高抗拔力、减小变形;二次注浆压力较低条件下对提高搅拌水泥土锚杆的抗拔力和减少变形的作用不大。
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| 关 键 词： | 搅拌水泥土锚杆 抗拔力 搅拌叶片 二次注浆 |
| 收稿时间： | 2010-12-13 |
Improvement test of uplift resistance and deformation of cement-soil mixing anchor |
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| LIU Gan-bin,SHEN Xue-yi,SU Zhou,LU Lin-long.Improvement test of uplift resistance and deformation of cement-soil mixing anchor[J].Rock and Soil Mechanics,2011,32(Z1):78-82. |
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| Authors: | LIU Gan-bin SHEN Xue-yi SU Zhou LU Lin-long |
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| Institution: | 1. College of Civil Engineering, Ningbo University, Ningbo, Zhejiang 315211, China; 2. Soil Improvement Center, Ningbo University, Ningbo, Zhejiang 315211, China |
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| Abstract: | The cement-soil mixing anchor,which can provide a great bearing capacity,is introduced.The effect of the cement-soil mixing anchor is superior to that of the soil nail in the same condition.However,the performance of controlling deformation of the anchor is inferior to that of the supporting brace.Therefore,the fracture morphology and the existing problem in this anchor is analyzed and presented based on the previous experiment and engineering application.Furthermore,the improved experimental schemes of inc... |
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| Keywords: | cement-soil mixing anchor uplift resistance Agitation blade Second grouting |
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