土工基础

›› 2013, Vol. 27 ›› Issue (3): 108-110.

• 工程实录 • 上一篇    下一篇

布袋注浆桩加筋材料作用试验分析

唐 鑫1，顾湘生2   

  1. （1.西南交通大学地球科学与环境工程学院，成都 610031；2.中铁第四勘察设计院集团有限公司，武汉 430063）
  • 收稿日期:2012-09-12 出版日期:2013-06-20 发布日期:2013-06-26
  • 作者简介:唐鑫（1987-），男，在读硕士研究生，研究方向为土木工程、地质工程等研究。

Role of Steel Reinforcement in the Grouted and Geotextile Tube Reinforced Gravel Columns

TANG Xin1, GU Xiangsheng2   

  1. (1.College of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031;2.China Railway Siyuan Survey and Design Group Co. Ltd., Wuhan 430063)
  • Received:2012-09-12 Online:2013-06-20 Published:2013-06-26

摘要： 通过布袋注浆桩现场工程低应变反射波法试验、钻探取芯无侧限抗压强度试验、单桩竖向静载试验、单桩水平静载试验结果,分析了布袋注浆桩加筋材料对桩体成桩质量、桩体强度、承载力的影响。结果表明，加筋材料对提高成桩质量有积极影响，且引入加筋注浆管简化了施工工艺，加筋材料对桩体的竖向抗压承载力影响较小，但对提高桩体的水平强度作用明显。

关键词: 布袋注浆桩, 加筋材料, 工程试验, 成桩质量, 水平静载

Abstract: There are two types of grouted, geotextile tube reinforced gravel columns: columns with or without steel reinforcement. The role of steel reinforcement is studied throughout the insitu loading tests. A total of eight columns are divided into groups with/without reinforcements for the comparative studies. The test items are: column integrity tests with low stress wave reflection method, unconfined compressive tests on grouted samples cored from the columns as well as vertical and horizontal loading tests on the single columns. The results indicate that the steel reinforcement has a positive influence on the column integrity and the introduction of grouting tubing simplifies the construction procedures. The steel reinforcement has limited impact on the axial capacity, but it has a significant impact on the lateral load resistance.

Key words: Grouted Geotextile Tube Reinforced Gravel Columns, Steel Reinforcements, In-Situ Tests, Column Integrity, Lateral Loading Tests