搅拌水泥土锚杆抗拔变形试验改进研究

›› 2011, Vol. 32 ›› Issue (S1): 78-82.

搅拌水泥土锚杆抗拔变形试验改进研究

刘干斌¹，沈学毅²，苏舟²，陆林龙¹

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

收稿日期:2010-12-13 出版日期:2011-05-15 发布日期:2011-05-16
作者简介:刘干斌，男，1976年生，博士，副教授，主要从事土动力学、岩土与地下工程方面的科研
基金资助:
宁波市重大科研攻关项目资助（No. 2009C50004）。

Improvement test of uplift resistance and deformation of cement-soil mixing anchor

LIU Gan-bin¹, SHEN Xue-yi², SU Zhou², LU Lin-long¹

1. College of Civil Engineering, Ningbo University, Ningbo, Zhejiang 315211, China; 2. Soil Improvement Center, Ningbo University, Ningbo, Zhejiang 315211, China

Received:2010-12-13 Online:2011-05-15 Published:2011-05-16

摘要/Abstract

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 increasing blades and the second grouting are presented to improve uplift resistance of the cement-soil mixing anchor. The setting of the blades is designed and the test is executed firstly; and then the distribution of axial forces along the anchor is tested. The results show that the effect of an anchor with a length of 12 m can play a role of an general cement-soil mixing anchor with a length of 15 m when the blades are added. The blades can help to improve the uplift resistance and decrease the displacement. In addition, the performance of the second grouting is not remarkable when the grouting pressure is low.

Key words: cement-soil mixing anchor, uplift resistance, Agitation blade, Second grouting

中图分类号:

O 347.2

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]. , 2011, 32(S1): 78-82.

LIU Gan-bin, SHEN Xue-yi, SU Zhou, LU Lin-long. Improvement test of uplift resistance and deformation of cement-soil mixing anchor[J]. , 2011, 32(S1): 78-82.

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